JP6920929B2 - Solid-liquid separation device and solid-liquid separation system - Google Patents

Description

The present invention relates to a solid-liquid separation device, and more particularly to a solid-liquid separation device and a solid-liquid separation system including a laminated rotary filter body.

Conventionally, a solid-liquid separator having a plurality of rotating bodies is known (see, for example, Patent Document 1).

Patent Document 1 discloses a solid-liquid separation device including a plurality of rotating bodies. Each of the plurality of rotating bodies includes a filter body and is arranged in two rows above and below. The solid-liquid separator is configured to discharge the filtrate below the rotating bodies in the lower row by filtering the object to be processed by a plurality of rotating bodies.

Japanese Unexamined Patent Publication No. 2008-12442

However, in the solid-liquid separation device as in Patent Document 1, a relatively clear filtrate having a small amount of solid components discharged from the upstream side of the solid-liquid separation device and a solid component discharged from the downstream side of the solid-liquid separation device. There is a problem that the filtrate is mixed with a relatively turbid filtrate. The size of the upstream range for discharging a relatively clear filtrate having a small amount of solid components and the downstream range for discharging a relatively turbid filtrate having a large amount of solid components varies depending on the properties of the object to be treated.

The present invention has been made to solve the above-mentioned problems, and one object of the present invention is to make a relatively clear filtrate and a relatively turbid filtrate even when the properties of the object to be treated change. It is to provide a solid-liquid separation apparatus and a solid-liquid separation system capable of separating from a liquid.

In order to achieve the above object, the solid-liquid separator in the first aspect of the present invention is arranged along the first rotation axis and the axial direction of the first rotation axis, and is a first filtration groove through which the filtrate is passed. It has a laminated rotating filter body in which The rotary body type dehydration unit includes a filtrate receiving portion that can change the range of receiving the filtrate that has passed through the first filtration groove in the direction along the moving direction of the object to be processed.

In the solid-liquid separator according to the first aspect of the present invention, as described above, the rotating body-type dehydrating section and the rotating body-type dehydrating section are arranged below the rotating body and in a direction along the moving direction of the object to be processed of the rotating body-type dehydrating section. , A filtrate receiving portion that can change the range of receiving the filtrate that has passed through the first filtration groove is provided. As a result, the range of receiving the filtrate can be changed to the upstream side and the downstream side of the rotary dehydration section, so that the filtrate discharged from the rotary dehydration section can be adjusted while adjusting the range of receiving the filtrate. It can be separated into a filtrate received by the filtrate receiving portion and a filtrate discharged to the outside of the filtrate receiving portion. Therefore, even when the properties of the object to be treated change, the relatively clear filtrate and the relatively turbid filtrate can be separated.

In the solid-liquid separator according to the first aspect, preferably, the filtrate receiving portion moves in the direction along the moving direction of the object to be processed of the rotating body type dehydrating part from the most upstream position of the rotating body type dehydrating part. It is configured so that the range of receiving the filtrate can be changed within the range up to the most downstream position of the rotary dehydrator, or it can be moved to the external retracted position of the lower region where the filtrate from the rotary dehydrator falls. .. With this configuration, the range in which the filtrate receiving portion receives the relatively clear filtrate can be changed by moving the filtrate receiving portion.

The solid-liquid separator according to the first aspect preferably has a second rotation shaft, and is arranged so as to surround the screw and the screw that feeds the supplied object to be processed with the rotation of the second rotation shaft. and a laminated filter body second filtering grooves are formed for passing the liquid, connected to the upstream side of the rotating rotary body type dewatering unit, further comprising a screw concentrator unit for concentrating of the object, receiving filtrate The portion is provided so as to be movable so as to straddle the lower region where the filtrate from the rotating body type dehydration portion falls and the lower region where the filtrate from the screw type concentrating portion falls. With this configuration, the object to be processed can be concentrated by the screw-type concentrating unit in the front stage (upstream side) of the rotating body-type dehydrating unit, so that the rotation speed of the screw-type concentrating unit and the rotating body-type dehydrating unit can be improved. The amount of the object to be treated by the solid-liquid separator can be increased, and the water content of the object to be processed can be effectively reduced.

The solid-liquid separation device according to the first aspect preferably further includes a discharge section for discharging the filtrate that has passed through the second filtration groove of the screw-type concentration section to the outside, and the filtrate receiving section includes a rotary dehydration section and a rotary body type dehydration section. The filtrate received from at least one of the screw type concentrators is discharged to the discharge part. With this configuration, the discharge section discharges the filtrate discharged from the screw-type concentrating section and the filtrate discharged from the rotary dehydrator section and received by the filtrate receiving section to the outside of the solid-liquid separator. Can be done.

In the solid-liquid separation device according to the first aspect, preferably, the filtrate receiving portion, the discharging portion, the discharging portion and the filtrate receiving portion are provided separately, and the rotary body type on the downstream side of the filtrate receiving portion is provided. A tank that integrally includes a storage section for storing the filtrate that has passed through the first filtration groove of the dehydration section is further provided. With this configuration, it is possible to receive the relatively clear filtrate at the filtrate receiving portion and discharge it from the discharge portion to the outside of the apparatus, and to store the relatively turbid filtrate in the storage portion. Further, the apparatus configuration can be simplified as compared with the case where the filtrate receiving portion and the storage portion are separated. In addition, unlike the relatively clear filtrate discharged from the screw-type concentrating section, the relatively turbid filtrate discharged from the rotary dehydration section and stored in the storage section is recirculated to ensure the object to be treated. It becomes possible to process.

In the solid-liquid separation device according to the first aspect, preferably, the filtrate receiving portion is provided with a discharge port which is arranged above the discharging portion and discharges the filtrate received from the rotating body type dehydrating portion to the discharging portion. The filtrate receiving portion includes an inner surface that is inclined so that the discharge port side is lowered, and is configured to move in a substantially horizontal direction within a range in which the discharge port and the discharge portion overlap in the vertical direction. With this configuration, the filtrate received on the inner surface of the filtrate receiving portion can be flowed toward the discharge port. Further, since the discharge port is always located above (directly above) the discharge part, the filtrate discharged from the discharge port can be reliably discharged to the discharge part.

The solid-liquid separation device according to the first aspect preferably includes a guide member that supports the filtrate receiving portion and extends in the moving direction of the filtrate receiving portion. With this configuration, the guide member can easily move the filtrate receiving portion in the direction along the moving direction of the object to be processed of the rotating body type dehydration portion.

The solid-liquid separation system according to the second aspect of the present invention is a laminated rotary filter which is arranged along the axial direction of the first rotation axis and the first rotation axis and has a first filtration groove through which the filtrate is passed. A rotary dehydrator having a body and including a plurality of rotating bodies arranged in two rows above and below to dehydrate the object to be processed, and a second rotating shaft having a second rotating shaft to supply the supplied object to be processed. Includes a screw that is fed as the rotating shaft rotates and a laminated filter that is arranged so as to surround the screw and has a second filtration groove through which the filtrate passes, and is connected to the upstream of the rotary dehydrator and covered. A range that receives the filtrate that has passed through the first filtration groove in the direction along the moving direction of the object to be processed of the screw type concentrator that concentrates the processed material and the rotary body type dehydrator that is arranged below the rotating body. The filtrate receiving part and the filtrate receiving part are separated from each other, and a storage part for storing the filtrate that has passed through the first filtration groove of the rotary dehydrator on the downstream side of the filtrate receiving part. It is provided with a tank containing, and a mixing tank in which the object to be processed is supplied from the storage unit, the solid components of the supplied object to be processed are aggregated and flocculated, and the object to be processed is supplied to the screw type concentrator. ..

In the solid-liquid separation system according to the second aspect of the present invention, as described above, the rotating body dehydrator and the rotating body are arranged below the rotating body in a direction along the moving direction of the object to be processed of the rotating body dehydrating device. , A filtrate receiving portion that can change the range of receiving the filtrate that has passed through the first filtration groove is provided. As a result, the range of receiving the filtrate can be changed to the upstream side and the downstream side of the rotary dehydrator, so that the filtrate discharged from the rotary dehydrator can be adjusted while adjusting the range of receiving the filtrate. It can be separated into a filtrate received by the filtrate receiving portion and a filtrate discharged to the storage portion. Therefore, it is possible to obtain a solid-liquid separation system capable of separating a relatively clear filtrate and a relatively turbid filtrate even when the properties of the object to be treated change.

According to the present invention, as described above, a solid-liquid separator and a solid-liquid separation capable of separating a relatively clear filtrate and a relatively turbid filtrate even when the properties of the object to be treated change. The system can be provided.

It is the schematic which showed the solid-liquid separation system provided with the solid-liquid separation apparatus by 1st Embodiment of this invention. It is a perspective view which showed the solid-liquid separation apparatus by 1st Embodiment of this invention. It is a perspective view which showed the guide member of the tank of the solid-liquid separation apparatus by 1st Embodiment of this invention, and the filtrate receiving member located in the non-retracted position. It is a perspective view which showed the guide member of the tank of the solid-liquid separation apparatus by 1st Embodiment of this invention, and the filtrate receiving member located in the retracted position. It is sectional drawing of the schematic side view which showed the solid-liquid separation apparatus by 1st Embodiment of this invention. It is an enlarged view of the main part of the screw type enrichment part by 1st Embodiment of this invention. It is a perspective view which showed the spacer of the screw type concentration part by 1st Embodiment of this invention. It is sectional drawing of the side view which showed the rotating body type dehydration part by 1st Embodiment of this invention. It is a side view which showed the rotating body type dehydration part by 1st Embodiment of this invention. It is sectional drawing along the line 400-400 of FIG. It is an enlarged plan view which showed the adjacent state of the laminated rotary filter body of the rotary body type dehydration part by 1st Embodiment of this invention. It is an exploded perspective view which showed the medium-diameter disk filter piece, the small-diameter disk filter piece, and the large-diameter disk filter piece of the laminated rotary filter piece of the rotary body type dehydration part by 1st Embodiment of this invention. It is a side view which showed the medium-diameter disk filter piece of the laminated rotary filter body of the rotary body type dehydration part by 1st Embodiment of this invention. It is a partially enlarged view of the H part of FIG. It is sectional drawing of the schematic side view which showed the solid-liquid separation apparatus by 2nd Embodiment of this invention. It is a perspective view which showed the filtrate receiving member of the solid-liquid separation apparatus by the modification of 1st and 2nd Embodiment of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[First Embodiment]
The first embodiment of the present invention will be described with reference to FIGS. 1 to 14.

(Structure of solid-liquid separation system)
As shown in FIG. 1, the solid-liquid separation system 100 according to the first embodiment of the present invention includes a solid-liquid separation device 100a and an agglutinating portion 100b.

The solid-liquid separation system 100 receives an object to be treated such as sludge from an external object storage tank T to be processed, supplies the coagulant in a plurality of times (three times), and stirs the object to be processed to coagulate the object to be treated. It is configured to do. Further, the solid-liquid separation system 100 is configured to discharge an object to be treated (dehydrated cake) having a small water content by performing a concentration treatment and a dehydration treatment on the aggregated object to be treated. The solid-liquid separation device 100a is configured to supply a polymer flocculant or an inorganic flocculant to the rotating body type dehydration unit 3.

The solid-liquid separation system 100 is configured so that the screw-type concentrating unit 2 described later mainly performs a concentrating process by gravity filtration. After that, the solid-liquid separation system 100 is configured to perform dehydration treatment mainly by squeeze filtration in a rotary body type dehydration unit 3 to be described later to which a screw type concentration unit 2 is connected from the upstream side. The screw-type concentrator 2 is an example of a "screw-type concentrator" within the scope of the claims. The rotary dehydrator 3 is an example of a "rotary dehydrator" within the scope of the claims.

The gravitational filtration is, for example, a filtration in which a liquid component (filter solution) is squeezed through a small gap or the like, and the solid component and the liquid component are separated by the gravity acting on the liquid content of the object to be treated. Filtration. Further, the squeeze filtration is a filtration in which a liquid component is squeezed out from the object to be processed by pressurizing (squeezing) the object to be processed.

The object to be treated is a mixture of water (liquid component) and a solid component. For example, the object to be treated is sludge. Concentration treatment reduces the water content of the aggregated object to be treated to a predetermined water content (for example, about 94 to about 98%, more preferably about 96%) while maintaining the fluidity of the object to be treated. It is a process to make it. In the screw type concentrating unit 2, the object to be treated is supplied by overflow from the aggregating unit 100b (mixing tank 7 described later) that performs the aggregating treatment in the stage prior to the solid-liquid separation treatment. The water content of the object to be treated supplied from the agglomerated portion 100b is, for example, about 98.0 to about 99.5%. Further, the dehydration treatment is a treatment in which the fluidity of the object to be treated is lost to reduce the volume of the object to be treated, and the water content is further lowered as compared with the concentration treatment. By the dehydration treatment, the water content of the object to be treated is reduced to, for example, about 70 to about 88%. The dehydrated object is discharged from the rotating body type dehydration unit 3 as a dehydrated cake (not shown).

Here, the screw type concentrating unit 2 and the rotating body type dehydrating unit 3 are provided so as to be arranged in the horizontal direction. In the following, the direction in which the screw type concentrating unit 2 and the rotating body type dehydrating unit 3 are lined up in the horizontal direction is defined as the X direction, and the direction orthogonal to the X direction in the horizontal direction is defined as the Y direction. Further, the vertical direction will be described as the Z direction. Further, of the X directions, the direction from the screw type concentrating unit 2 to the rotating body type dehydrating unit 3 is the X1 direction, and the opposite direction is the X2 direction.

(Structure of solid-liquid separator)
Next, the configuration of the solid-liquid separation device 100a will be described with reference to FIGS. 1 to 14.

As shown in FIG. 1, the solid-liquid separator 100a includes a tank (service tank) 1, a screw-type concentrating unit 2, a rotating body-type dehydrating unit 3, a storage unit coagulant supply unit 4, and a rotating body coagulant supply. A portion 5 and a connecting member 6 are provided. The screw-type concentrating unit 2 mainly contains a relatively clear (containing a small amount of solid components) filtrate discharged to the outside of the apparatus (below the apparatus) by concentrating the object to be processed, and the substrate. It is configured to separate from the processed material. The rotary body type dehydration unit 3 is mainly subjected to the dehydration treatment of the object to be concentrated by the screw type concentration unit 2, so that the filter is relatively turbid (a large amount of solid components are contained) stored in the tank 1. It is configured to separate the liquid and the object to be treated (dehydrated cake) discharged to the outside of the device.

<Tank configuration>
As shown in FIG. 1, a screw type concentrating unit 2 and a rotating body type dehydrating unit 3 are installed directly above the tank 1. The screw type concentrating part 2 and the rotating body type dehydrating part 3 are integrally provided via the tank 1.

The tank 1 includes a box body 10 having a filtrate storage portion 10a, a guide member 11, a filtrate receiving member 12, and a discharging member 13. The filtrate receiving member 12 is configured to be manually movable in the X direction (arrangement can be changed) along the guide member 11. Details of the movement of the filtrate receiving member 12 will be described later. The filtrate receiving member 12 includes a filtrate receiving portion 121, a discharge port 122 provided in the filtrate receiving portion 121, and a pair of supported portions 123. The discharge member 13 is an example of a "discharge unit" within the scope of the claims.

<Composition of the box>
As shown in FIG. 2, the box body 10 generally has a hollow rectangular parallelepiped shape with the X direction as the longitudinal direction. Inside the box body 10, a guide member 11 (see FIG. 3), a filtrate receiving member 12, and a discharging member 13 are arranged. In FIG. 2, the guide member 11 is not shown for convenience of explanation.

On the upper surface of the box body 10, at least, a range that overlaps with the housing 31 described later of the rotary dehydration unit 3 in the vertical direction and a range that overlaps with the laminated filter body 23 described later of the screw type concentrating unit 2 in the vertical direction. An upper opening 10b is provided over the entire area. The upper opening 10b communicates with the lower end opening 31d (see FIG. 1) of the housing 31, which will be described later. The screw type concentrating part 2 and the rotating body type dehydrating part 3 are configured to discharge the filtrate into the box body 10 through the upper opening 10b.

The box body 10 is provided with a lid (not shown) that can be opened and closed on the upper surface or the side surface so that the user can hold the filtrate receiving member 12 when moving the filtrate receiving member 12. Has been done.

The box body 10 has a storage unit 10a for storing a relatively turbid filtrate (a filtrate containing a large amount of solid components) discharged from the downstream side of the rotary dehydration portion 3 at the inner bottom portion. The storage portion 10a is arranged so as to overlap the filtrate receiving portion 121 in the vertical direction (Z direction). The storage portion 10a is provided separately from the discharge member 13 and the filtrate receiving portion 121, and is configured so that the object to be processed is not directly delivered to each other.

As shown in FIG. 1, the storage unit 10a is configured to store the filtrate that has passed through the first filtration groove S2 (see FIG. 14) described later in the rotary dehydration unit 3. That is, the storage unit 10a is configured to store the filtrate obtained by the dehydration treatment in the rotary dehydration unit 3. Further, the storage unit 10a is configured to receive the object to be processed from the object storage tank T and store the object to be processed.

The storage unit 10a is provided with a stirring pump 10c and a supply pump 10d.

The stirring pump 10c is supplied to the storage unit 10a from the object to be processed (including the filtrate) supplied from the object storage tank T and the screw type concentration unit 2, and to the storage unit 10a from the storage unit coagulant supply unit 4. It is configured to agglomerate the object to be treated (increase the concentration of the solid component (flock)) by stirring with the inorganic flocculant.

The supply pump 10d is configured to be stored in the storage unit 10a and supply (return) the aggregated object to be processed to the agglomeration unit 100b provided on the upstream side (previous stage side) of the screw type concentrating unit 2.

<Structure of guide member>
The guide member 11 shown in FIG. 3 has a pair of configurations that are fixedly attached to a pair of inner side surfaces 10e of the box body 10 facing in the Y direction. The pair of guide members 11 are arranged at the same height position. The guide member 11 may not be directly attached to the inner side surface 10e, but may be fixedly attached to a reinforcing member (not shown) of the box body 10 such as a pillar. In FIG. 3, only one of the pair of inner side surfaces 10e is shown.

As shown in FIGS. 3 and 4, the pair of guide members 11 are configured to support the filtrate receiving member 12 (a pair of supported portions 123 of the filtrate receiving member 12, which will be described later) from below. In short, the pair of guide members 11 is a portion on which the filtrate receiving member 12 is placed. The guide member 11 extends in the moving direction (X direction) of the filtrate receiving member 12 (filter liquid receiving portion 121).

Specifically, each of the pair of guide members 11 includes a support portion 111, a downstream regulation portion 112, and an upstream regulation portion 113, respectively.

The support portion 111 extends in the X direction and has a flat plate shape with the vertical direction as the thickness direction. The support portion 111 is configured to come into contact with the filtrate receiving member 12 (a pair of supported portions 123 of the filtrate receiving member 12, which will be described later) from below.

The downstream side regulating portion 112 is formed so as to project upward from the X1 direction end portion (downstream side end portion) of the support portion 111. The downstream side regulating unit 112 has a function of defining the range of movement of the filtrate receiving member 12 to the downstream side by restricting the movement of the filtrate receiving member 12 by contact in the X direction.

The upstream side regulating portion 113 is formed so as to project upward from the X2 direction end portion (upstream side end portion) of the support portion 111. The upstream side regulating unit 113 has a function of defining the range of movement of the filtrate receiving member 12 to the upstream side by restricting the movement of the filtrate receiving member 12 by contact in the X direction.

The range of movement of the filtrate receiving member 12 (the filtrate receiving portion 121 described later) in the X direction is the casing of the rotating body type dehydrating portion 3 when focusing on the downstream end portion of the filtrate receiving member 12 (the filtrate receiving portion 121). This is the range between the position directly below the body 31 and the intermediate position (see FIG. 2) described later.

Focusing on the upstream end of the filtrate receiving portion 121, the moving range of the filtrate receiving portion 121 in the X direction is directly below the housing 31 of the rotating body type dehydrating unit 3 and the housing 31 of the rotating body type dehydrating unit 3. It is a range with a predetermined position on the X2 direction side directly below.

As shown in FIG. 3, in the Y direction, the distance D1 between the pair of support portions 111 (guide members 11) is set between the pair of opposite edge portions 131 and 132 of the upper opening 130 of the filtrate receiving member 12, which will be described later. The interval between them is larger than D2 (D1> D2).

In the Y direction, the distance D1 between the pair of support portions 111 (guide members 11) is smaller than the distance D3 between the outer ends of the pair of supported parts 123 of the filtrate receiving member 12 (D1 <D3). ..

When the arrangement of the filtrate receiving member 12 is changed, the downstream regulating portion 112 comes into contact with the filtrate receiving member 12 (the end portion of the supported portion 123 in the X1 direction) from the downstream side (X1 direction side), whereby the filter is filtered. It is configured to restrict the movement of the liquid receiving member 12 to the downstream side (X1 direction side).

As shown in FIG. 5, the downstream end of the filtrate receiving portion 121 is located at an intermediate position in the X direction of the housing 31 of the rotating body type dehydrating portion 3 in a state of being in contact with the downstream regulating portion 112. .. The intermediate position is a position in the X direction, and is an intermediate position between the side wall 31b on the X1 side (downstream side) of the housing 31 and the side wall 31a on the X2 side (upstream side) of the housing 31. be. That is, the intermediate position is a position separated from the side wall 31b and the side wall 31a by an interval L1 equal to the X direction, respectively.

As shown in FIG. 4, when the arrangement of the filtrate receiving member 12 is changed, the upstream side regulating portion 113 receives the filtrate receiving member 12 (the end portion of the supported portion 123 in the X2 direction) from the upstream side (X2 direction side). It is configured to restrict the movement of the filtrate receiving member 12 to the upstream side (X2 direction side) by abutting against. The position of the filtrate receiving member 12 is in the retracted position, which will be described later, in a state of being in contact with the upstream side regulating portion 113.

When the size of the filtrate receiving portion 121 in the X direction is L2 and the size of the supported portion 123 in the X direction is L3, the upstream regulating portion 113 is larger than the downstream regulating portion 112 in the X direction. It is arranged at a position on the X2 direction side by a distance (L2 + L3). That is, the size of the guide member 11 in the X direction is (L2 + L3).

<Structure of filtrate receiving member>
As shown in FIG. 4, the filtrate receiving member 12 is arranged below the rotating body 32 (see FIG. 1) of the rotating body type dehydrating unit 3 described later, and is arranged in the moving direction of the object to be processed of the rotating body type dehydrating unit 3. The range of receiving the filtrate that has passed through the first filtration groove S2, which will be described later, of the rotating body type dehydrating unit 3 can be changed in the direction along the line. Details will be described later.

The direction along the moving direction of the object to be processed of the rotary body type dehydration unit 3 is the horizontal direction in which the screw type concentration unit 2 and the rotary body type dehydration unit 3 are aligned (X direction).

As described above, the filtrate receiving member 12 includes the filtrate receiving portion 121, the discharge port 122, and the pair of supported portions 123.

The filtrate receiving portion 121 generally has a shape in which the horizontal cross-sectional shape becomes smaller toward the bottom. Specifically, the filtrate receiving portion 121 generally has a hollow quadrangular pyramid shape with a top located below. The filtrate receiving portion 121 is arranged so as to be sandwiched between the pair of supporting portions 111.

The filtrate receiving portion 121 has a rectangular upper opening 130 at the upper portion. The upper opening 130 is formed by a pair of edge portions 131 and 132 extending in the X direction and facing each other in the Y direction, and a pair of edge portions 133 and 134 extending in the Y direction and facing each other in the X direction. Has been done. The edge portion 133 is located on the X1 direction side of the edge portion 134.

The pair of edge portions 133 and 134 facing in the X direction are arranged at the end portion in the X1 direction and the end portion in the X2 direction of the filtrate receiving portion 121, respectively. Therefore, the distance between the pair of edge portions 133 and 134 is equal to the size L2 of the filtrate receiving portion 121 in the X direction.

As shown in FIG. 2, the size of the filtrate receiving portion 121 in the X direction is approximately equal to the distance L1 in the X direction from the side wall 31b (side wall 31a) of the housing 31 to the intermediate position of the housing 31 (L2). L2 = L1).

As shown in FIG. 4, the filtrate receiving portion 121 has an inner surface 121d that is inclined so that the discharge port 122 side is lowered. The filtrate receiving portion 121 is configured to receive the filtrate on the inner surface 121d.

The discharge port 122 is formed so as to project diagonally downward on the X2 direction side from the lower end of the filtrate receiving portion 121.

The filtrate receiving member 12 is provided with a through hole 124 between the discharge port 122 and the filtrate receiving portion 121. The filtrate receiving member 12 causes the filtrate received by the filtrate receiving portion 121 (inner surface 121d) to flow to the discharge port 122 through the through hole 124, and the filtrate is discharged diagonally downward from the discharge port 122 in the X2 direction. It is configured to discharge.

As shown in FIG. 2, the discharge port 122 is arranged above the discharge member 13. The discharge port 122 is configured to discharge the filtrate received from at least one of the rotating body type dehydration unit 3 and the screw type concentration unit 2 to the discharge member 13.

As shown in FIG. 4, the pair of supported portions 123 are provided so as to project outward in the Y direction from the pair of edge portions 131 and 132 facing in the Y direction, respectively. Further, each of the pair of supported portions 123 extends in the horizontal direction and has a flat rectangular flat plate shape with the X direction as the longitudinal direction. The pair of supported portions 123 are respectively configured to be placed and supported on the pair of support portions 111 (guide members 11).

As shown in FIG. 5, the filtrate receiving portion 121 moves in the direction (X direction) along the moving direction of the object to be processed of the rotating body type dehydrating part 3 from the most upstream position of the rotating body type dehydrating part 3. The range to receive the filtrate is changed within the range up to the intermediate position of the rotary dehydrator 3, or the filtrate can be moved to an external retracted position in the lower region where the filtrate from the rotary dehydrator 3 falls. ..

The retracted position is the position of the filtrate receiving member 12 when the filtrate receiving member 12 retracts to the outside of the lower region where the filtrate from the rotary dehydrator 3 falls. The retracted position is a position when the filtrate receiving member 12 moves most toward the X2 direction. The filtrate receiving member 12 located at the retracted position is located directly below the screw type concentrating unit 2, and receives the filtrate only from the screw type concentrating unit 2. Further, at the retracted position, the end portions of the pair of supported portions 123 in the X2 direction are in contact with the upstream regulating portion 113. Further, in the retracted position, the downstream end portion (X1 direction end portion) (edge portion 133) of the filtrate receiving member 12 is located directly below the side wall 31a of the housing 31.

In the following, the position of the filtrate receiving member 12 located on the X1 direction side (downstream side) from the retracted position will be referred to as a non-evacuated position. In short, the position of the filtrate receiving member 12 excluding the retracted position is set as the non-evacuated position.

The downstream end (X1 direction end) (X1 direction edge 133) of the filtrate receiving member 12 located at the non-evacuated position is located on the X1 direction side of the side wall 31a of the housing 31. There is. Further, when the filtrate receiving member 12 moves most toward the X2 direction, the downstream end portion of the filtrate receiving member 12 is arranged at an intermediate position in the X direction of the housing 31 of the rotating body type dehydration section 3.

The filtrate receiving member 12 located at the non-retracted position has a filtrate receiving member in a lower region where the filtrate from the rotating body type dehydration unit 3 falls and a lower region where the filtrate from the screw type concentrating unit 2 falls. It is provided so as to be movable so as to straddle the twelve.

The filtrate receiving member 12 located at the non-evacuated position is configured to continuously expand the range of receiving the filtrate from the rotating body type dehydrating unit 3 by moving to the downstream side (X1 direction). On the other hand, the filtrate receiving member 12 located at the non-retracted position is in a range of receiving the filtrate from the rotary dehydrator 3 by moving upstream (in the X2 direction) (moving toward the retracted position). Is configured to be continuously reduced.

The maximum range for receiving the filtrate is the range between the position directly below the side wall 31a of the housing 31 located at the most upstream position of the rotating body type dehydrating unit 3 and the intermediate position of the housing 31 in the X direction. Become. Further, the range of receiving the filtrate is the minimum (excluding the case where it becomes zero), and in the X direction, directly below the side wall 31a of the housing 31 located at the most upstream position of the rotating body type dehydration unit 3 (the most upstream position). It is in the vicinity.

At the position of the filtrate receiving member 12 on the most downstream side of the non-evacuated positions, the upstream end portion (X2 direction end portion) (X2 direction side edge portion 134) of the filtrate receiving member 12 is the side wall of the housing 31. It is located directly below 31a.

The pair of supported portions 123 are configured to arrange the filtrate receiving member 12 at the most movable downstream position by bringing the downstream end portion into contact with the downstream regulating portion 112 of the guide member 11. There is. Further, the pair of supported portions 123 are arranged at the most movable position (evacuation position) where the filtrate receiving member 12 can be moved by bringing the upstream side end portion into contact with the upstream side regulating portion 113 of the guide member 11. It is configured to do.

As shown in FIG. 1, the filtrate receiving portion 121 (filter liquid receiving member 12) is configured to move in the substantially horizontal direction (X direction) within a range in which the discharge port 122 and the discharge member 13 overlap in the vertical direction. Has been done.

Here, the screw type concentrating unit 2 is configured to discharge the filtrate directly to the discharge member 13 or indirectly via the filtrate receiving member 12. The rotary body type dehydration unit 3 is configured to directly discharge the filtrate to the storage portion 10a when the filtrate receiving member 12 is located at the retracted position.

On the downstream side of the rotating body type dehydrating section 3, when the filtrate receiving member 12 is located in the non-retracted position (when at least a part of the filtrate receiving member 12 is located in the lower region of the rotating body type dehydrating section 3), the filtrate It is configured to directly discharge the filtrate from the downstream side of the rotary dehydrating unit 3 to the storage unit 10a without passing through the receiving member 12. At the same time, when the filtrate receiving member 12 is located in the non-retracted position, the upstream side of the rotating body type dehydrating unit 3 is sent to the discharge member 13 via the filtrate receiving member 12 from the upstream side of the rotating body type dehydrating unit 3. Is configured to discharge.

<Structure of discharge member>
The discharge member 13 is arranged diagonally downward on the X2 direction side of the filtrate receiving portion 121. Further, the discharge member 13 overlaps at least the entire laminated filter body 23 of the screw type concentration unit 2 described later so that the filtrate discharged from the screw type concentration unit 2 can be received in the vertical direction. It is placed in position.

The discharge member 13 has a discharge path 13a for discharging the filtrate to the outside of the solid-liquid separation device 100a (tank 1), and an inclined portion 13b having an inner surface inclined toward the discharge path 13a.

The filtrate discharged from the discharge passage 13a is a relatively clear filtrate. Therefore, the filtrate discharged from the discharge passage 13a has a light load applied in the subsequent water treatment step (disinfection or the like).

(Structure of screw type concentrator)
As shown in FIG. 1, the screw type concentrating unit 2 includes a supply member 21 including an inflow port 21a of an object to be processed, a screw 22, a laminated filter body 23, an outer frame 24, and a motor 25. ing.

The screw type concentrator 2 generally has an elongated shape extending in a straight line. The screw type concentrating unit 2 is arranged so as to be inclined diagonally upward toward the downstream side (X1 direction side). That is, the screw type concentrating unit 2 is configured to be positioned upward as it approaches the rotating body type dehydrating unit 3. As an example, the screw type concentrating unit 2 is inclined at a predetermined inclination angle (for example, 30 degrees) with respect to the horizontal plane. By arranging the screw-type concentrating unit 2 in an inclined manner in this way, the residence time of the object to be processed inside the screw-type concentrating unit 2 is lengthened, and gravity filtration of the object to be processed in the screw-type concentrating unit 2 is more effective. Can be done. Further, the screw type concentrating unit 2 extends in the X direction in a plan view. Hereinafter, the extending direction of the screw type concentrating unit 2 will be described as the A direction. Further, the direction toward the downstream side of the A direction will be referred to as the A1 direction, and the opposite direction will be referred to as the A2 direction.

The screw 22 includes a rod-shaped second rotating shaft 22a extending linearly. The second rotating shaft 22a extends in the same direction (A direction) as the screw type concentrating unit 2. That is, the second rotation shaft 22a is arranged so as to be inclined diagonally upward toward the downstream side (X1 direction side).

<Structure of supply member>
As shown in FIG. 1, the supply member 21 is a hollow tubular member. The supply member 21 is provided with an inflow port 21a at the upper end. A part of the screw 22 is arranged inside the supply member 21. A motor 25 is arranged adjacent to the supply member 21 on the A2 direction side.

<Structure of screw>
As shown in FIG. 1, the screw 22 includes a second rotating shaft 22a and a blade portion 22b. The second rotating shaft 22a penetrates the supply member 21 in the A direction and is connected to the motor 25 at the end in the A2 direction. The screw 22 is configured to send the object to be processed supplied from the inflow port 21a in the A1 direction (rotary body type dehydration unit 3 side).

The blade portion 22b is provided on the outer peripheral surface of the second rotating shaft 22a. Further, the blade portion 22b extends spirally in the axial direction (A direction) of the second rotating shaft 22a. Further, the blade portions 22b are formed by one continuous blade, and are formed so that the pitches of the second rotating shaft 22a in the axial direction (A direction) are substantially equal. The screw 22 may be composed of a plurality of divided blades.

<Structure of laminated filter body>
As shown in FIG. 1, the laminated filter body 23 has a tubular shape in which the screw 22 is arranged inside so as to surround the screw 22 as a whole and extends in the A direction.

As shown in FIG. 6, the laminated filter body 23 includes a plurality of fixing plates 26, a plurality of spacers 27, and a plurality of movable plates 28, and the fixing plate 26 and the movable plate 28 are in the A direction. It has a laminated structure in which it is laminated alternately.

<Structure of fixing plate>
As shown in FIG. 6, the fixing plate 26 has an annular shape extending in a direction substantially orthogonal to the A direction. That is, the fixing plate 26 has a circular through hole 26a that penetrates the fixing plate 26 in the A direction at the center. The fixing plate 26 is fixed by an outer frame 24 that comes into contact with a plurality of locations on the outer edge of the fixing plate 26 so as not to move.

A screw 22 is passed through the through hole 26a. The through hole 26a has a predetermined size so that the fixing plate 26 does not come into contact with the rotating screw 22. That is, the inner peripheral radius of the through hole 26a is larger than the distance from the rotation center axis α of the screw 22 to the outermost edge portion of the blade portion 22b (the portion of the blade portion 22b most distant from the second rotation shaft 22a). ..

The fixing plate 26 has a screw hole 26b in the vicinity of the outer edge portion, which penetrates the fixing plate 26 in the A direction and to which the spacer 27 is attached. A plurality of screw holes 26b are provided with respect to one fixing plate 26 at predetermined intervals in the radial direction.

<Spacer configuration>
As shown in FIG. 7, the spacer 27 has a male screw portion 27a extending in the A direction and a pillar-shaped main body portion 27b supporting one end of the male screw portion 27a from the A1 direction side. The main body 27b has a thickness t1 in the A direction.

As shown in FIG. 6, the spacer 27 is attached to the screw hole 26b from one surface side (A1 direction side) of the fixing plate 26. On the end surface of the spacer 27 on the A1 direction side, another fixing plate 26 different from the fixing plate 26 to which the spacer 27 is attached is arranged in a contact state. That is, the spacer 27 has a function of separating two fixing plates 26 adjacent to each other in the A direction by a gap t1 from each other.

<Composition of movable plate>
As shown in FIG. 6, the movable plate 28 has an annular shape extending in a direction substantially orthogonal to the A direction. That is, the movable plate 28 has a circular through hole 28a that penetrates the fixed plate 26 in the A direction at the center.

A screw 22 is passed through the through hole 28a. The through hole 28a has a predetermined size so that the movable plate 28 can come into contact with the rotating screw 22. That is, the inner peripheral radius of the through hole 28a is smaller than the distance from the rotation center axis α of the screw 22 to the outermost edge portion of the blade portion 22b (the portion of the blade portion 22b most distant from the second rotation shaft 22a). .. Further, the movable plate 28 is arranged between two fixing plates 26 adjacent to each other in the A direction. Further, the thickness t2 of the movable plate 28 in the A direction is smaller than the distance t1 between the two fixing plates 26 adjacent to each other in the A direction (thickness t1 of the main body portion 27b (see FIG. 7) of the spacer 27). Further, unlike the fixing plate 26, the movable plate 28 is configured to be movable without being fixed by the outer frame 24 (see FIG. 1).

Specifically, the movable plate 28 is moved (rotated) by the blade portion 22b in a state orthogonal to the A direction and eccentric in the direction away from the rotation center axis α as the screw 22 rotates, and the movable plate 28 is moved (rotated). It is configured to be moved (swinged) in the A direction by the blade portion 22b between the two fixing plates 26 sandwiching the 28.

<Structure of filtration groove and filter water outflow groove>
As shown in FIG. 6, a second filtration groove S1 having a gap t1 is formed between the adjacent fixing plates 26 by the spacer 27. Further, in the A direction, a filter water outflow groove G1 having a gap (t1-t2) is formed in a portion of the second filtration groove S1 between the adjacent fixing plates 26 except for the movable plate 28. The filter water outflow groove G1 is a gap portion between two fixing plates 26 arranged adjacent to each other in the A direction and a movable plate 28.

The screw type concentrating unit 2 is configured to separate the liquid component from the object to be treated by rotating the screw 22 to pass the filtrate through the second filtration groove S1 (filter water outflow groove G1). There is. At this time, the screw type concentrating unit 2 is configured to be able to continuously move the movable plate 28 between the two fixing plates 26 by rotating the screw 22. Therefore, clogging of the filter water outflow groove G1 (second filtration groove S1) can be suppressed. That is, the screw type concentrating unit 2 is configured to self-clean the filter water outflow groove G1 (second filtration groove S1).

<Structure of outer frame>
As shown in FIG. 1, the outer frame 24 has a skeleton structure that surrounds the laminated filter body 23 from the outside. The outer frame 24 fixes each of the fixing plates 26 constituting the laminated filter body 23 to each other by contacting a plurality of locations in the circumferential direction of the outer edge portion of the fixing plate 26.

(Structure of connecting member)
As shown in FIG. 1, the connecting member 6 is arranged between the screw type concentrating unit 2 and the rotating body type dehydrating unit 3, and connects the screw type concentrating unit 2 and the rotating body type dehydrating unit 3.

Specifically, the connecting member 6 includes an outer frame 24 of the screw-type concentrating unit 2 arranged on the A2 direction side and a side wall 31a of the housing 31 of the rotating body-type dehydrating unit 3 arranged on the A1 direction side, which will be described later. You are connected. The connecting member 6 connects the screw-type concentrating unit 2 and the rotating body-type dehydrating unit 3 in a state where the screw-type concentrating unit 2 is inclined obliquely upward toward the downstream side (X1 direction side). The lower end of the opening 6c of the end portion 6b on the A1 direction side of the connecting member 6 is provided above the lower end of the inflow port 21a of the object to be processed to the screw type concentrating part 2, and the rotating body type dehydrating part 3 is dehydrated. It is provided below the lower end of the discharge port 31c of the completed object to be processed (dehydrated cake).

The connecting member 6 has a tubular shape extending in the same direction (A direction) as the screw type concentrating unit 2. The connecting member 6 communicates with the internal region of the laminated filter body 23 of the screw type concentrating unit 2 through the opening 6a at the end on the A2 direction side. Further, the connecting member 6 communicates with the internal region of the housing 31 of the rotating body type dehydrating portion 3 through the opening 6c at the end portion on the A1 direction side. Further, the connecting member 6 is configured to supply (discharge) the object to be processed to the inside of the housing 31 of the rotating body type dehydration unit 3 through the opening 6c.

(Arrangement of connecting members between the screw type concentrating part and the rotating body type dehydrating part)
As shown in FIG. 8, the connecting member 6 is provided in the vicinity of the rotating body 32 arranged in the uppermost stream of the lower row among the plurality of rotating bodies 32 described later in the rotating body type dehydration unit 3. Further, the connecting member 6 is provided above the rotating body 32 (in the Z1 direction). With this configuration, the screw-type concentrating unit 2 can be kept in a full state even when the water level in the rotating body-type dehydrating unit 3 is low. Concentration processing can be performed. Further, since the screw type concentrating unit 2 is arranged at an angle, it is configured so that the inside of the screw type concentrating part 2 can be easily kept in a full state as compared with the case where the screw type concentrating part 2 is arranged horizontally. ing.

Further, the connecting member 6 is provided below the water level gauge 37 of the rotating body type dehydration unit 3 (in the Z2 direction). Further, the connecting member 6 is provided below (Z2 direction) the rotating body 32 arranged in the uppermost stream of the upper row among the plurality of rotating bodies 32. That is, the connecting member 6 is provided between the rotating body 32 arranged in the uppermost stream in the upper row and the rotating body 32 arranged in the uppermost stream in the lower row in the vertical direction (Z direction). Further, since the first rotating shaft 22a of the screw type concentrating part 2 extends in an oblique direction (A direction) so that the rotating body type dehydrating part 3 side (X1 direction side) becomes higher, the screw type concentrating part 2 is , The object to be processed is pushed into the rotating body 32 arranged in the uppermost stream in the lower row and the rotating body 32 arranged in the uppermost stream in the upper row, and the rotating body type dehydration unit 3 is processed. It is configured to supply (discharge (input)) goods. As a result, the object to be processed can be directly supplied from the screw type concentrating unit 2 to the inside of the rotating body type dehydrating unit 3 via the connecting member 6. As a result, unlike the case where the object to be processed is supplied from a high position into the object to be processed inside the rotating body type dehydration unit 3 by dropping, the impact applied to the object to be processed can be further suppressed. As a result, it is possible to prevent the flocs in the object to be processed from collapsing.

(Structure of rotating body type dehydration part)
As shown in FIG. 4, the rotating body type dehydrating unit 3 includes a housing 31 including side walls 31a and 31b, a plurality of rotating bodies 32, a plurality of motors 33 (see FIG. 5), a baffle plate 34, and sludge scraping. It is provided with a take plate 35, a discharge chute 36, and a water level gauge 37.

The housing 31 is a box-shaped member provided so as to surround the plurality of rotating bodies 32, and the open lower end opening 31d is connected to the upper opening 10b of the box body 10 of the tank 1. As described above, the connecting member 6 is connected (attached) to the side wall 31a on the X2 direction side of the housing 31. The side wall 31b on the X1 direction side of the housing 31 is provided with a discharge port 31c for the object to be treated (dehydrated cake). The side walls 31a and 31b are plate-shaped members that are arranged at both ends of the housing 31 in the X direction and extend in directions orthogonal to the X direction (Z direction and Y direction).

<Structure of rotating body>
The rotating body 32 includes a laminated rotating filter body 300 and a first rotating shaft 310 inserted through the laminated rotating filter body 300 and extending in the Y direction.

A plurality of stacked rotary filters 300 are arranged in two rows above and below toward the discharge port 31c so as to send the object to be processed to the discharge port 31c. Specifically, the laminated rotary filter bodies 300 in the lower row are arranged at predetermined intervals, and rotate in the same direction (clockwise in FIG. 1) to deliver the object to be processed to the discharge port 31c. It is configured to send. Further, the laminated rotary filter body 300 in the upper row rotates in the opposite direction (counterclockwise direction in FIG. 1) to the laminated rotary filter body 300 in the lower row, thereby sending the object to be processed to the discharge port 31c. It is configured as follows.

As a whole, the plurality of rotating bodies 32 are arranged so as to incline upward toward the downstream side. That is, the path of the object to be processed formed by the plurality of rotating bodies 32 (the region between the rotating bodies 32 in the upper row and the rotating bodies 32 in the lower row) is configured to incline upward as it goes downstream. Has been done. Further, the path of the object to be processed formed by the plurality of rotating bodies 32 is configured to gradually narrow in width toward the downstream.

As shown in FIGS. 10 and 11, the stacked rotary filter body 300 includes a plurality of filter pieces stacked along the first rotation axis 310.

Specifically, as shown in FIG. 12, the laminated rotary filter body 300 includes a plurality of medium-diameter disk filter pieces 301, a plurality of small-diameter disk filter pieces 302, and a plurality of large-diameter disk filter pieces 303. Contains 3 types of filter pieces.

The medium-diameter disk filter piece 301, the small-diameter disk filter piece 302, and the large-diameter disk filter piece 303 all have an annular shape. That is, the medium-diameter disk filter piece 301, the small-diameter disk filter piece 302, and the large-diameter disk filter piece 303 all have a through hole 304 through which the first rotation shaft 310 is inserted. Further, the medium-diameter disk filter piece 301, the small-diameter disk filter piece 302, and the large-diameter disk filter piece 303 are all fitted to the first rotating shaft 310 via the through hole 304.

The laminated rotary filter body 300 has a medium-diameter disk filter piece 301, a small-diameter disk filter piece 302, and a large diameter in a state where the first rotary shaft 310 is inserted into the through hole 304 so as to surround the first rotary shaft 310. It has a multi-plate structure in which disk strips 303 are alternately laminated in the Y direction.

The laminated rotary filter body 300 is configured by alternately arranging (laminating) a large-diameter disk filter piece 303 and a small-diameter disk filter piece 302 between a plurality of medium-diameter disk filter pieces 301 arranged in the Y direction. ing. In short, in the laminated rotary filter body 300, each filter piece is in the order of medium-diameter disk filter piece 301, large-diameter disk filter piece 303, medium-diameter disk filter piece 301, and small-diameter disk filter piece 302 in the Y direction. Are repeatedly arranged (laminated) to form a structure. Alternatively, each of the filter pieces may be repeatedly arranged (laminated) in the order of the medium-diameter disk filter piece 301, the small-diameter disk filter piece 302, the medium-diameter disk filter piece 301, and the large-diameter disk filter piece 303.

<Composition of medium-diameter disc filter pieces>
The medium-diameter disc filter piece 301 is provided on one surface of a disk-shaped plate-shaped portion 301a, a plurality of (four) convex portions 301b provided on one surface of the plate-shaped portion 301a, and the other surface of the plate-shaped portion 301a. It has a plurality of (4) convex portions 301c.

The plurality of convex portions 301b are arranged at positions separated from the center of the medium-diameter disc filter piece 301 by a predetermined distance, and are arranged at equal pitch intervals in the circumferential direction of the medium-diameter disk filter piece 301. The plurality of convex portions 301c are provided at positions overlapping the convex portions 301b in the Y direction. Further, the amount of protrusion d1 from one surface of the convex portion 301b is larger than the thickness d3 of the small-diameter disk filter piece 302 and the thickness d4 of the large-diameter disk filter piece 303 (d1> d3, d1> d4).

As shown in FIG. 13, the convex portion 301c only slightly protrudes from the other surface of the plate-shaped portion 301a, and is actually located substantially on the same surface as the other surface of the plate-shaped portion 301a. (It is almost flush). Further, the amount of protrusion d2 of the convex portion 301c from the other surface is extremely smaller than the amount of protrusion d1 of the convex portion 301b from one surface (d1 >> d2). In each figure, for convenience of explanation, the protrusion amount d2 of the convex portion 301c is shown larger than the actual protrusion amount.

In the medium-diameter disc filter piece 301, the convex portion 301b is brought into contact with the convex portion 301c of another medium-diameter disc filter piece 301 adjacent to one direction side in the Y direction, and the convex portion 301c is brought into contact with the other convex portion 301c in the Y direction. It is laminated in a state of being in contact with the convex portion 301b of another medium-diameter disc filter piece 301 adjacent to the side. Therefore, the plate-shaped portion 301a of the medium-diameter disc filter piece 301 is separated from the plate-shaped portion 301a of the other adjacent medium-diameter disc filter pieces 301 by a gap (d1 + d2). That is, the plate-shaped portion 301a of the medium-diameter disc filter piece 301 is separated from the plate-shaped portion 301a of the other adjacent medium-diameter disc filter pieces 301 by the total amount of protrusion of the convex portion 301b and the convex portion 301c. ing.

As shown in FIG. 14, between two adjacent medium-diameter disc filter pieces 301 (plate-shaped portion 301a), a first filtration groove S2 having a gap (d1 + d2) is formed by the convex portion 301b and the convex portion 301c. It is formed.

<Composition of small-diameter disc filter pieces>
As shown in FIG. 12, the small-diameter disc filter piece 302 generally has a disc shape. Further, the small-diameter disc filter pieces 302 are arranged at equal pitch intervals in the circumferential direction, and have a plurality of (4) cutout portions 302a notched from the outer edge portion toward the center of the small-diameter disc filter pieces 302. ing. The plurality of cutout portions 302a are provided at positions that overlap the convex portions 301b and the convex portions 301c of the medium-diameter disc filter piece 301 in the Y direction. Further, the cutout portion 302a is configured to engage with the convex portion 301b. The small-diameter disc filter piece 302 has two adjacent medium-diameter disc filter pieces 301 (plate-shaped portion 301a) in a state where the cutout portion 302a is engaged with the convex portion 301b of the medium-diameter disc filter piece 301. It is placed in between.

As shown in FIG. 14, the thickness d3 of the small-diameter disk filter piece 302 is smaller than the gap (d1 + d2) between two adjacent medium-diameter disk filter pieces 301 (plate-shaped portion 301a). Therefore, a filter water outflow groove G21 having a gap (d1 + d2-d3) is formed between the two adjacent medium-diameter disk filter pieces 301 (plate-shaped portion 301a) and the small-diameter disk filter piece 302. There is.

That is, a filter water outflow groove G21 having a gap (d1 + d2-d3) is formed in a portion of the first filtration groove S2 between two adjacent medium-diameter disk filter pieces 301 except for the small-diameter disk filter piece 302. There is. Therefore, the small-diameter disk filter piece 302 is configured to be swingable in the swing range β in the Y direction in which the first filtration groove S2 is formed. In the rotary body type dehydration unit 3, the small-diameter disk filter piece 302 swings with the rotation of the first rotation shaft 310 and rotates while rubbing the side surface of the medium-diameter disk filter piece 301. It is possible to suppress clogging of 1 filtration groove S2). That is, the rotating body type dehydration unit 3 can self-clean the filter water outflow groove G21 (first filtration groove S2). Further, the filter water outflow groove G21 is configured to filter the object to be treated by passing the liquid component contained in the object to be treated.

<Composition of large-diameter disc filter pieces>
As shown in FIG. 12, the large-diameter disk filter piece 303 has a disk shape. Further, the large-diameter disc filter pieces 303 are arranged at positions separated from the center of the large-diameter disk filter pieces 303 by a predetermined distance, and a plurality (4 pieces) of penetrations arranged at equal pitch intervals in the circumferential direction. It has a hole 303a.

The plurality of through holes 303a are provided at positions that overlap the convex portions 301b and the convex portions 301c of the medium-diameter disc filter piece 301 in the Y direction. Further, the through hole 303a is configured to fit into the convex portion 301b and the convex portion 301c of the medium-diameter disc filter piece 301. Further, the large-diameter disc filter piece 303 has two adjacent medium-diameter disc filter pieces 301 (plate-shaped) in a state where the convex portion 301b of the medium-diameter disc filter piece 301 is fitted into the through hole 303a. It is arranged between the portions 301a).

As shown in FIG. 14, the thickness d4 of the large-diameter disk filter piece 303 is smaller than the gap (d1 + d2) of the adjacent medium-diameter disk filter pieces 301 (plate-shaped portion 301a). Therefore, a filter water outflow groove G22 having a gap (d1 + d2-d4) is formed between the two adjacent medium-diameter disk filter pieces 301 (plate-shaped portion 301a) and the large-diameter disk filter piece 303. ing.

That is, a filter water outflow groove G22 having a gap (d1 + d2-d4) is formed in a portion of the first filtration groove S2 between two adjacent medium-diameter disk filter pieces 301 except for the large-diameter disk filter piece 303. ing. Therefore, the large-diameter disk filter piece 303 is configured to be swingable in the swing range γ in the Y direction in which the first filtration groove S2 is formed. In the rotary body type dehydration unit 3, the large-diameter disk filter piece 303 swings with the rotation of the first rotating shaft 310, and rotates while rubbing the side surface of the medium-diameter disk filter piece 301. It is possible to suppress clogging of the first filtration groove S2). That is, the rotating body type dehydration unit 3 can self-clean the filter water outflow groove G22 (first filtration groove S2). Further, the filter water outflow groove G22 is configured to filter the object to be treated by passing the liquid component contained in the object to be treated.

Since the object to be processed can be concentrated by the screw type concentrating unit 2, the rotating body type dehydrating unit 3 has a motor 33 (first rotation) at a faster rotation speed than a general rotating body type dehydrating device. It is configured to rotate the shaft 310). As a specific example, while the rotation speed of a general rotary dehydrator is 0.5 revolutions per minute, the rotary dehydrator 3 has a rotation speed of about twice that of the motor 33 (1 revolution per minute). The first rotation shaft 310) is configured to rotate.

As shown in FIG. 11, the large-diameter disk frame 303 of the rotating body 32 in the upper row (lower row) and the large-diameter disk frame 303 of the rotating body 32 in the other adjacent upper row (lower row) are They are arranged alternately so as to overlap each other in the Y direction. That is, the large-diameter disk filter piece 303 of the rotating body 32 in the upper row (lower row) is two medium-diameter disks sandwiching the small-diameter disk frame 302 of the rotating body 32 in the other upper row (lower row) adjacent to each other. It is arranged so as to bite between the pieces 301. Further, the medium-diameter disk filter piece 301 of the rotating body 32 in the upper row (lower row) and the medium-diameter disk filter piece 301 of the rotating body 32 in the other adjacent upper row (lower row) are approximately abbreviated in the Y direction. It is provided in the same range (position).

As shown in FIG. 10, the motor 33 is provided at one end in the axial direction (Y direction) of each of the first rotating shafts 310 of the plurality of stacked rotary filters 300. Further, the motors 33 are provided for each of a plurality of (10) stacked rotating filters 300 (for each rotating body 32). In addition, instead of providing a motor 33 for each stacked rotary filter body 300, a motor 33 is provided in some of the laminated rotary filter bodies 300, and a chain or the like is provided on the laminated rotary filter body 300 in which the motor 33 is not provided. It may be configured to transmit power.

As shown in FIG. 1, the baffle plate 34 is arranged between the side wall 31a that separates the screw type concentrating part 2 and the rotating body type dehydrating part 3 of the tank 1 and the rotating body 32 arranged at the uppermost stream in the lower row. ing. Further, the baffle plate 34 is arranged so as to fill a gap between the side wall 31a and the rotating body 32.

One sludge scraping plate 35 is provided for each of the most downstream rotating body 32 in the lower row and the most downstream rotating body 32 in the upper row, and the sludge scraping plate 35 is clogged between the laminated rotating filter bodies 300 of the rotating bodies 32. It is configured to scrape and remove solids. The discharge chute 36 is provided in the discharge port 31c of the housing 31, and constitutes a discharge path for the discharge discharged from the rotating body type dehydration unit 3.

As shown in FIG. 1, the water level gauge 37 is provided on the inner upper surface of the rotating body type dehydration unit 3. Further, the water level gauge 37 is provided above (Z1 direction) the rotating body 32 arranged at the uppermost stream in the upper row. When the solid-liquid separation system 100 detects the water level inside the rotary dehydrator 3 by the water level gauge 37, the solid-liquid separation system 100 transfers the screw to the screw concentrator 2 so that the water level inside the rotary dehydrator 3 does not rise. It is configured to stop the supply of the object to be processed.

The rotating body coagulant supply unit 5 is configured to supply a polymer coagulant or an inorganic coagulant to the object to be treated concentrated by the screw type concentrator 2. Specifically, the rotating body coagulant supply unit 5 supplies the object to be processed discharged from the screw type concentrating unit 2 from above the rotating body 32 arranged in the uppermost stream in the lower row of the rotating body dehydrating unit 3. It is configured to do. The polymer flocculant or the inorganic flocculant supplied to the rotating body dehydrating section 3 by the rotating body coagulant supply unit 5 is stirred with the object to be treated by the rotating body 32.

(Structure of agglutinating part)
Next, the configuration of the agglutinating portion 100b will be described with reference to FIG.

The aggregating section 100b includes a mixing tank 7, a mixing tank aggregating agent supply section 8, and an impeller 9. The mixing tank 7 is configured so that the object to be processed is supplied from the storage portion 10a of the solid-liquid separation device 100a. Further, the mixing tank 7 includes an overflow port 7a for discharging the object to be processed by overflow and supplying the object to be processed to the screw type concentrating unit 2. The mixing tank coagulant supply unit 8 is configured to supply the polymer coagulant to the mixing tank 7. The impeller 9 is arranged in the mixing tank 7. Further, the impeller 9 is provided with a motor 9a as a drive source. The impeller 9 is configured to agitate the object to be treated and the polymer flocculant supplied to the mixing tank 7 to aggregate the object to be treated (increase the concentration of the solid component (flock)). ..

(Effect of the first embodiment)
In the first embodiment, the following effects can be obtained.

In the first embodiment, as described above, the rotating body type dehydration unit 3 and the first filtration groove are arranged below the rotating body 32 and in the direction along the moving direction of the object to be processed of the rotating body type dehydration unit 3. A filtrate receiving portion 121 that can change the range of receiving the filtrate that has passed through S2 is provided. As a result, the range of receiving the filtrate can be changed to the upstream side and the downstream side of the rotary body type dehydration unit 3, so that the filtrate discharged from the rotary body type dehydration unit 3 can be adjusted while adjusting the range of receiving the filtrate. Can be separated into a filtrate received by the filtrate receiving portion 121 and a filtrate discharged to the storage portion 10a. Therefore, even when the properties of the object to be treated change, the relatively clear filtrate and the relatively turbid filtrate can be separated.

Further, in the first embodiment, as described above, the filtrate receiving portion 121 is moved in the direction along the moving direction of the object to be processed of the rotating body type dehydrating part 3, so that the uppermost stream of the rotating body type dehydrating part 3 is reached. The range for receiving the filtrate is changed in the range from the position to the intermediate position of the rotary dehydrator 3, or the filtrate can be moved to an external retracted position in the lower region where the filtrate from the rotary dehydrator 3 falls. .. By moving the filtrate receiving portion 121 in this way, the range in which the filtrate receiving portion 121 receives the relatively clear filtrate can be changed.

Further, in the first embodiment, as described above, the screw 22 having the second rotation shaft 22a and sending the supplied object to be processed with the rotation of the second rotation shaft 22a and the screw 22 are arranged so as to surround the screw 22. A screw-type concentrating unit 2 that includes a laminated filter body 23 on which a second filtration groove S1 is formed through which the filtrate is passed, is connected to the rotating body-type dehydration unit 3 from the upstream side, and concentrates the object to be processed. The filtrate receiving portion 121 is provided so as to be movable so as to straddle the lower region where the filtrate from the rotating body type dehydration portion 3 falls and the lower region where the filtrate from the screw type concentrating portion 2 falls. As a result, the object to be processed can be concentrated by the screw-type concentrating unit 2 in the front stage (upstream side) of the rotating body-type dehydrating unit 3, so that the rotational speeds of the screw-type concentrating unit 2 and the rotating body-type dehydrating unit 2 are improved. The amount of the object to be treated by the solid-liquid separator 100a can be increased, and the water content of the object to be processed can be effectively reduced.

Further, in the first embodiment, as described above, the discharge member 13 for discharging the filtrate that has passed through the second filtration groove S1 of the screw type concentrating unit 2 to the outside is provided, and the filtrate receiving portion 121 is dehydrated by the rotary body type. The filtrate received from at least one of the section 3 and the screw type concentrating section 2 is discharged to the discharge member 13. As a result, the discharge member 13 discharges the filtrate discharged from the screw type concentrating unit 2 and the filtrate discharged from the rotary dehydration unit 3 and received by the filtrate receiving unit 121 to the outside of the solid-liquid separation device 100a. be able to.

Further, in the first embodiment, as described above, the filtrate receiving portion 121, the discharging member 13, the discharging member 13 and the filtrate receiving portion 121 are separated and arranged, and are downstream from the filtrate receiving portion 121. A tank 1 is provided that integrally includes a storage unit 10a for storing the filtrate that has passed through the first filtration groove S2 of the rotating body type dehydration unit 3 on the side. As a result, the relatively clear filtrate can be received by the filtrate receiving portion 121 and discharged from the discharge member 13 to the outside of the apparatus, and the relatively turbid filtrate can be stored in the storage portion 10a. Further, the apparatus configuration can be simplified as compared with the case where the filtrate receiving portion 121 and the storage portion 10a are separated. Further, unlike the relatively clear filtrate discharged from the screw-type concentrating section 2, the relatively turbid filtrate discharged from the rotary dehydration section 3 and stored in the storage section is recirculated to recirculate the workpiece. It is possible to process reliably.

Further, in the first embodiment, as described above, the filtrate is arranged above the discharge member 13 in the filtrate receiving portion 121, and the filtrate received from the rotating body type dehydration portion 3 is discharged to the discharge member 13. The filtrate receiving portion 121 is configured to include an inner surface 135 that is inclined so that the discharge port 122 side is lowered, and to move in a substantially horizontal direction within a range in which the discharge port 122 and the discharge member 13 overlap in the vertical direction. do. As a result, the filtrate received on the inner surface 135 of the filtrate receiving portion 121 can flow toward the discharge port 122. Further, since the discharge port 122 is always located above (directly above) the discharge member 13, the filtrate discharged from the discharge port 122 can be reliably discharged to the discharge member 13.

Further, in the first embodiment, as described above, the filtrate receiving portion 121 is supported, and the guide member 11 extending in the moving direction of the filtrate receiving portion 121 is provided. As a result, the guide member 11 can easily move the filtrate receiving portion 121 in the direction along the moving direction of the object to be processed of the rotating body type dehydrating portion 3.

[Second Embodiment]
Next, a second embodiment of the present invention will be described with reference to FIG. In the second embodiment, unlike the first embodiment in which the solid-liquid separation device 100a includes the screw type concentrating unit 2 and the rotary body type dehydration unit 3, the solid-liquid separation device 200a includes the rotary body type dehydration unit 3. In addition, an example in which the screw type concentrating unit 2 is not provided will be described.

As shown in FIG. 15, the solid-liquid separation device 200a of the second embodiment includes a tank 201 and a rotating body type dehydration unit 3. The solid-liquid separating device 200a of the second embodiment does not include the screw type concentrating unit 2 like the solid-liquid separating device 100a of the first embodiment.

The tank 201 includes a guide member 211.

When the filtrate receiving member 12 comes into contact with the downstream regulating portion 112 of the guide member 211 (when the filtrate receiving member 12 moves most toward the X1 direction), the filtrate receiving member 12 is located at the downstream end portion (X1). Four rotating bodies 32 in the upper and lower rows are located on the X1 direction side of the edge portion 133) on the direction side. The filtrate receiving member 12 is configured to receive the filtrate at the most upstream position of the rotating body type dehydrating unit 3 regardless of the position.

In FIG. 15, when the filtrate receiving member 12 comes into contact with the downstream regulating portion 112 of the guide member 211, the X-direction position of the downstream end portion of the filtrate receiving member 12 is shown by the line P1.

When the filtrate receiving member 12 comes into contact with the upstream side regulating portion 113 of the guide member 211 (when the filtrate receiving member 12 moves most toward the X2 direction), the filtrate receiving member 12 has a downstream end portion (edge). The rotating bodies 32 arranged in two upper and lower rows are located on the X1 direction side of the portion 133), and are arranged only in the lower row on the X2 direction side of the downstream end portion (X1 direction end portion) (edge portion 133). The rotating body 32 to be formed is located.

In FIG. 15, when the filtrate receiving member 12 comes into contact with the upstream side regulating portion 113 of the guide member 211, the X direction position of the downstream end portion of the filtrate receiving member 12 is shown by the line P2.

(Effect of the second embodiment)
In the second embodiment, the following effects can be obtained.

In the second embodiment, similarly to the first embodiment, the rotating body type dehydration unit 3 and the rotating body type dehydration unit 3 are arranged below the rotating body 32, and in a direction along the moving direction of the object to be processed of the rotating body type dehydration unit 3. A filtrate receiving portion 121 that can change the range of receiving the filtrate that has passed through the first filtration groove S2 is provided. As a result, even when the properties of the object to be treated change, the filtrate receiving portion 121 can be moved to separate the relatively clear filtrate and the relatively turbid filtrate.

(Modification example)
It should be noted that the embodiments disclosed this time are exemplary in all respects and are not considered to be restrictive. The scope of the present invention is shown by the scope of claims rather than the description of the above-described embodiment, and further includes all modifications (modifications) within the meaning and scope equivalent to the scope of claims.

For example, in the first and second embodiments, the discharge port of the filtrate receiving member is formed so as to be narrowed in the width direction (Y direction), but the present invention is not limited to this. In the present invention, as in the modified examples of the first real and the second embodiment shown in FIG. 16, the discharge port 322 of the filtrate receiving member 312 has substantially the same width (size in the Y direction) as the inclined inner surface 135. It may be formed. That is, the filtrate receiving member 312 is provided with the inclined inner surface 135, the pair of side surfaces 136 extending upward from both ends of the inclined inner surface 135 in the Y direction, and the pair of supported portions 123 provided at the upper ends of the pair of side surfaces 136, respectively. It may be formed by. The shape of the filtrate receiving member is not limited to that shown in the first embodiment, the second embodiment, and the modified example, and the first filtration is performed in the direction along the moving direction of the object to be processed of the rotary dehydrator. If the range for receiving the filtrate that has passed through the groove can be changed, the filtrate receiving member may be formed in a shape different from that of the first embodiment, the second embodiment, and the modified example.

For example, in the first and second embodiments, the example in which the filtrate receiving portion is configured to be manually moved has been shown, but the present invention is not limited to this. In the present invention, the filtrate receiving portion may be provided with a driving portion so as to move mechanically. In this case, for example, a measuring device for measuring the water content of the filtrate discharged from the rotating body dehydrating part is provided in the rotating body dehydrating part, and the filtrate receiving part is determined by the driving unit based on the measurement result of the measuring device. You may move it to a position.

Further, in the first and second embodiments, the example in which the filtrate receiving portion is configured to move in the horizontal direction is shown, but the present invention is not limited to this. In the present invention, the filtrate receiving portion may be configured to move in an oblique direction.

Further, in the first and second embodiments, an example is shown in which the range for receiving the filtrate is changed by moving the filtrate receiving portion, but the present invention is not limited to this. In the present invention, for example, the filtrate receiving portion may be configured to be expandable and contractible, and the filtrate receiving portion may be expanded and contracted to change the range of receiving the filtrate.

Further, in the first and second embodiments, an example is shown in which the filtrate receiving portion is configured to receive the filtrate on the upstream side of the rotary dehydration portion, but the present invention is not limited to this. In the present invention, the filtrate receiving portion may be configured to receive the filtrate on the downstream side of the rotary dehydration portion.

Further, in the first embodiment, the example in which the filtrate receiving portion is configured to be movable to the retracted position is shown, but the present invention is not limited to this. In the present invention, the filtrate receiving portion may be provided so as to straddle the lower region where the filtrate from the rotating body type dehydration portion falls and the lower region where the filtrate from the screw type concentrating portion falls.

Further, in the first embodiment, the filtrate receiving portion is moved in the direction along the moving direction of the object to be processed of the rotating body type dehydrating part, so that the rotating body type dehydrating part is moved from the most upstream position of the rotating body type dehydrating part. An example has been shown in which the range for receiving the filtrate can be changed within the range up to the intermediate position (the intermediate position in the X direction of the housing of the rotating body type dehydrator), but the present invention is not limited to this. In the present invention, for example, by moving the filtrate receiving portion in the direction along the moving direction of the object to be processed of the rotating body type dehydrating part, the position from the most upstream position of the rotating body type dehydrating part to the most downstream position of the rotating body type dehydrating part. The range for receiving the filtrate may be changed within the range up to.

Further, in the first and second embodiments, an example is shown in which the guide members are configured as a pair (two) of supporting the filtrate receiving portions from both sides of the filtrate receiving portion. Not exclusively. In the present invention, for example, the guide member may be one structure that supports the guide member from below the filtrate receiving portion.

Further, in the first and second embodiments, the filtrate discharged from the rotary dehydrator is stored in a tank and returned (recirculated) to the screw concentrator (screw concentrator) via the mixing tank. However, the present invention is not limited to this. In the present invention, it is not necessary to provide a tank. If a tank is not provided, the object to be processed can be pumped directly from the object storage tank to the coagulation tank, and the filtrate discharged from the rotating dehydrator is pumped to the object storage tank. Correspond by sending by.

Further, in the first and second embodiments, the example in which the motor of the rotating body type dehydration unit is arranged only on one side in the axial direction of the first rotating shaft is shown, but the present invention is not limited to this. In the present invention, the motors of the rotating body type dehydrating unit may be alternately arranged on one side and the other side in the axial direction of the first rotating shaft.

Further, in the first and second embodiments, an example in which the screw type concentrating portion is arranged in an inclined manner is shown, but the present invention is not limited to this. In the present invention, the screw type concentrator may be arranged horizontally.

Further, in the first and second embodiments, an example in which the screw type concentrating part and the rotating body type dehydrating part are connected via a connecting member is shown, but the present invention is not limited to this. In the present invention, the screw type concentrating part and the rotating body type dehydrating part may be directly connected without using a connecting member.

1,201 tank 2 screw type concentrator (screw type concentrator)
3 Rotating body type dehydrator (rotary body type dehydrator)
10a Reservoir 11, 211 Guide member 13 Discharge member (Discharge unit)
22a 2nd rotating shaft 22b screw 23 laminated filter body 32 rotating body 100a solid-liquid separator 121 filtrate receiving part 122 discharge port 135 inner surface 300 laminated rotating filter body 310 1st rotating shaft S1 2nd filtration groove S2 1st filtration groove

Claims (8)

It has a first rotating shaft and a laminated rotating filter body arranged along the axial direction of the first rotating shaft and having a first filtration groove through which the filtrate passes, and is arranged in two rows above and below. A rotating body type dehydration unit that includes a plurality of rotating bodies and dehydrates the object to be processed,
A filtrate receiving portion which is arranged below the rotating body and can change the range of receiving the filtrate passing through the first filtration groove in the direction along the moving direction of the object to be processed of the rotating body type dehydration portion. A solid-liquid separator. The filtrate receiving portion moves in a direction along the moving direction of the object to be processed of the rotating body type dehydrating part, from the most upstream position of the rotating body type dehydrating part to the most downstream position of the rotating body type dehydrating part. The first aspect of claim 1, wherein the range for receiving the filtrate is changed within the range, or the filtrate is movable to a retracted position outside the lower region where the filtrate from the rotary dehydrator falls. Solid-liquid separator. A screw having a second rotation shaft and sending the supplied object to be processed with the rotation of the second rotation shaft, and a second filtration groove arranged so as to surround the screw and allowing the filtrate to pass through were formed. and a laminated filter body is connected to the upstream side of the pre-Symbol rotator type dewatering unit, further comprising a screw concentrator unit for concentrating the object to be processed,
The filtrate receiving portion is provided so as to be movable so as to straddle a lower region where the filtrate from the rotating body type dehydration portion falls and a lower region where the filtrate from the screw type concentrating portion falls. The solid-liquid separator according to claim 1 or 2. A discharge section for discharging the filtrate that has passed through the second filtration groove of the screw type concentration section to the outside is further provided.
The solid-liquid separation device according to claim 3, wherein the filtrate receiving portion is configured to discharge the filtrate received from at least one of the rotating body type dehydrating portion and the screw type concentrating portion to the discharging portion. The filtrate receiving portion, the discharging portion, the discharging portion, and the filtrate receiving portion are separated from each other, and the first filtration groove of the rotating body type dehydration portion on the downstream side of the filtrate receiving portion. The solid-liquid separation device according to claim 4, further comprising a tank that integrally includes a storage unit that stores the filtrate that has passed through the filter medium. The filtrate receiving portion is provided with a discharge port which is arranged above the discharging portion and discharges the filtrate received from the rotating body type dehydrating portion to the discharging portion.
The filtrate receiving portion includes an inner surface that is inclined so that the discharge port side is lowered, and is configured to move in a substantially horizontal direction within a range in which the discharge port and the discharge portion overlap in the vertical direction. The solid-liquid separator according to claim 4 or 5. The solid-liquid separation device according to any one of claims 2 to 6, further comprising a guide member that supports the filtrate receiving portion and extends in the moving direction of the filtrate receiving portion. It has a first rotating shaft and a laminated rotating filter body arranged along the axial direction of the first rotating shaft and having a first filtration groove through which the filtrate passes, and is arranged in two rows above and below. A rotating body type dehydrator that includes multiple rotating bodies and dehydrates the object to be processed,
A screw having a second rotation shaft and sending the supplied object to be processed with the rotation of the second rotation shaft, and a second filtration groove arranged so as to surround the screw and allowing the filtrate to pass through were formed. A screw type concentrator including a laminated filter body, which is connected to the upstream of the rotary body type dehydrator and concentrates the object to be processed, and a screw type concentrator.
A filtrate receiving portion which is arranged below the rotating body and can change the range of receiving the filtrate passing through the first filtration groove in the direction along the moving direction of the object to be processed of the rotating body type dehydrator. A storage unit that is separated from the filtrate receiving portion and stores the filtrate that has passed through the first filtration groove of the rotating body type dehydrator on the downstream side of the filtrate receiving portion is integrally provided. Including tank and
The solid-liquid separation is provided with a mixing tank in which the object to be processed is supplied from the storage unit, the solid components of the supplied object to be processed are aggregated and flocculated, and the object to be processed is supplied to the screw type concentrator. system.

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