JP6905405B2 - 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 separation device including a laminated rotary filter body is known (see, for example, Patent Document 1).

The above-mentioned Patent Document 1 discloses a solid-liquid separation device including a rotating body type dehydration unit. The rotating body type dehydrating unit has a rotating shaft and a laminated rotating filter body arranged along the axial direction of the rotating shaft and having a filtration groove formed therein, and includes a plurality of rotating bodies arranged in two upper and lower rows. , It is configured to dehydrate the object to be treated.

Japanese Unexamined Patent Publication No. 2005-7327

However, in the solid-liquid separation device as in Patent Document 1, in order to reduce the water content of the discharged object (dehydrated cake), it is necessary to rotate the rotating body at a relatively low speed, and the efficiency of discharge is high. There is an inconvenience that it gets worse. On the other hand, if the rotating body is rotated at a relatively high speed for efficient discharge, the dehydration treatment becomes insufficient and the water content becomes high. Therefore, in the solid-liquid separation device, there is a problem that it is difficult to efficiently discharge the object to be treated and to reduce the water content of the object to be treated at the same time.

The present invention has been made to solve the above-mentioned problems, and one object of the present invention is to reduce the water content of the object to be treated and to efficiently discharge the object to be treated. To provide a solid-liquid separation device and a solid-liquid separation system.

In order to achieve the above object, the solid-liquid separator in the first aspect of the present invention has a first rotation shaft, and a screw and a screw that feed the supplied object to be processed with the rotation of the first rotation shaft. A screw-type concentrating part that is arranged so as to surround the surface and has a first filtration groove formed therein, and concentrates an object to be processed, a second rotating shaft, and an axial direction of the second rotating shaft. Includes a plurality of rotating bodies arranged in two rows above and below, having a laminated rotating filter body arranged along and having a second filtration groove formed therein, connected to a screw-type concentrator, and concentrated by a screw-type concentrator. It is provided with a rotating body-type dehydration section for dehydrating the processed object, and further includes a connection section for connecting the screw-type concentration section and the rotary body-type dehydration section. It is provided below . The concentration treatment is a treatment for reducing the water content of the object to be treated to a predetermined water content while maintaining the fluidity of the object to be treated. 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.

In the solid-liquid separation device according to the first aspect of the present invention, as described above, the screw-type concentrating unit including the screw and the laminated filter body on which the first filtration groove is formed and concentrating the object to be processed is laminated. A rotary body type dehydration unit including a rotating body having a rotary filter body, connected to a screw type concentration unit, and dehydrating an object to be processed concentrated by the screw type concentration unit is provided. As a result, the solid-liquid separation treatment can be performed in two steps by the screw type concentrating part and the rotating body type dehydrating part, as compared with the case where the solid-liquid separation treatment is performed in one step only by the rotating body type dehydrating part as in the conventional case. Therefore, even if the rotation of the screw and the rotation of the rotating body are increased, the water content of the object to be treated can be reduced. As a result, the solid-liquid separation device can reduce the water content of the object to be treated and efficiently discharge the object to be treated. In addition, by using a screw type concentrating part in the previous stage, the water content of the object to be treated is moderately reduced by the concentration treatment instead of the dehydration treatment, and the object to be treated is supplied to the rotating body type dehydrating part while maintaining fluidity. Therefore, the dehydration treatment can be effectively performed without clogging the rotating body type dehydration portion with the object to be processed.

In the solid-liquid separation device according to the first aspect, preferably, the connecting portion that connects the screw type concentrating unit and the rotating body type dehydrating unit and delivers the object to be processed between the screw type concentrating unit and the rotating body type dehydrating unit is , It is provided in the vicinity of the lower row most upstream side rotating body arranged in the uppermost stream of the lower row among the plurality of rotating bodies, and above the lower row most upstream side rotating body. With this configuration, the connection part that delivers the object to be processed is provided in the vicinity of the lower row most upstream side rotating body arranged in the uppermost stream of the lower row, so that the screw type concentration is performed even when the water level in the rotating body type dehydration part is low. Since the portion can be kept in a full state, it can be pushed into the screw-type concentrating portion to cover the water head, and the concentrating treatment can be performed more efficiently. Further, since the object to be processed can be supplied (charged) to the rotary dehydrator from a relatively low height position, unlike the case where the object to be processed is supplied to the rotary dehydrator from a relatively high height position. Since the impact applied to the object to be processed when the object to be processed is supplied to the rotating body type dehydration unit via the connection portion can be suppressed, it is possible to prevent the flocs in the object to be processed from collapsing due to the impact. can.

In this case, preferably, the rotating body type dehydration part includes a water level gauge provided above the uppermost stream side rotating body, and the connecting part is provided below the water level gauge. With this configuration, the object to be processed can be directly supplied from the screw-type concentrating unit to the object to be processed inside the rotating body-type dehydrating unit via the connecting portion. 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 by dropping, the impact applied to the object to be processed can be further suppressed. As a result, it is possible to further suppress the collapse of the flocs in the object to be treated.

In a configuration in which the connecting portion is provided in the vicinity of the uppermost stream side rotating body in the lower row and above the uppermost flowing side rotating body in the lower row, the connecting portion is preferably in the upper row of the plurality of rotating bodies. It is provided below the uppermost stream rotating body arranged at the uppermost stream. With this configuration, the connecting portion is provided at a height position between the upper row most upstream rotating body and the lower row most upstream rotating body, so that the object to be processed can be rotated between the upper row rotating body and the lower row rotating body from the connecting portion. It can be supplied toward the body. As a result, a force for pushing the object to be processed can be applied between the rotating body in the upper row and the rotating body in the lower row. As a result, the object to be processed can be effectively conveyed in the rotating body type dehydration unit.

In a configuration in which the connecting portion is provided in the vicinity of the lower row most upstream side rotating body, preferably, the rotating body type dehydrating portion is between the side wall where the connecting portion is provided and the side wall and the lower row most upstream side rotating body. The lower end of the connecting portion is arranged at substantially the same height as the end portion of the plate-shaped member on the connecting portion side, including the plate-shaped member arranged so as to fill the gap. With this configuration, the gap between the side wall and the lower row uppermost stream side rotating body can be filled with the plate-shaped member, so that the object to be processed is not dehydrated and the side wall and the lower row uppermost stream side rotating body are formed. It is possible to suppress the outflow from between.

In the solid-liquid separation device according to the first aspect, preferably, the screw of the screw type concentrating part is configured to rotate at a higher rotation speed than the rotating body of the rotating body type dehydrating part. Because of this configuration, the screw-type concentrator mainly performs gravity filtration, and the rotary dehydration unit mainly performs squeeze filtration that requires a larger torque than gravity filtration. With the above configuration, the rotating body of the rotating body type dehydrating unit can be rotated at a relatively low speed to perform the dehydration treatment, so that a large torque can be easily generated in the rotating body, and the rotating body can be squeezed and filtered. Dehydration treatment can be reliably performed.

In the solid-liquid separation device according to the first aspect, preferably, the filtrate receiving portion for receiving the filtrate that has passed through the first filtration groove of the screw type concentrating portion and the filtrate receiving portion are provided separately and are of a rotating body type. A tank that integrally includes a storage unit that stores the filtrate that has passed through the second filtration groove of the dehydration unit is further provided, and the object to be processed stored in the storage unit is returned to the previous stage of the screw type concentration unit. It is configured in. With this configuration, it is possible to receive a relatively clear filtrate having a low solid content at the filtrate receiving portion and discharge it to the outside of the apparatus, and to store a relatively dirty filtrate having a high solid content 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. Further, as compared with the filtrate discharged from the screw type concentrating section, the contaminated filtrate discharged from the rotating body type dehydration section and containing a large amount of solid components is recirculated, so that the object to be treated can be reliably treated. ..

In the solid-liquid separation device according to the first aspect, preferably, the screw type concentrator has a discharge port for discharging the object to be processed from the side of the rotary body type dehydration part to the inside along the axial direction of the first rotation axis. include. With this configuration, the object to be processed can be discharged in the axial direction of the first rotating shaft by the discharge port, so that a force pushing in the axial direction is applied to the object to be processed inside the rotating body type dehydration section. Can be done. As a result, the object to be processed can be effectively conveyed in the rotating body type dehydration unit.

The solid-liquid separation system in the second aspect of the present invention has a first 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 first rotation shaft. 1 A screw-type concentrator that includes a laminated filter body in which a filtration groove is formed and concentrates an object to be processed, a second rotation shaft, and a second filtration shaft arranged along the axial direction of the second rotation shaft. It contains a plurality of rotating bodies arranged in two upper and lower rows having a laminated rotating filter having a groove formed therein, and is connected to a screw type concentrator to dehydrate an object to be processed concentrated by the screw type concentrator. The rotary body type dehydrator to be performed, the filtrate receiving part for receiving the filtrate passing through the first filtration groove of the screw type concentrator, and the filtrate receiving part are provided separately, and the second filtration groove of the rotary body type dehydrator is provided. A tank that integrally includes a storage unit that stores the filtrate that has passed through the filter, and the object to be processed are supplied from the tank, and the solid components of the supplied object to be processed are aggregated and flocculated, and the object to be processed is made It is provided with a mixing tank for supplying to the screw type concentrator, further provided with a connection portion for connecting the screw type concentrator and the rotary dehydrator, and the connection portion is provided below the solid discharge port of the rotary dehydrator. Is .

In the solid-liquid separation system according to the second aspect of the present invention, as described above, a screw-type concentrating unit that includes a screw and a laminated filter body on which the first filtration groove is formed and concentrates the object to be processed is laminated. A rotary body type dehydration unit including a rotating body having a rotary filter body, connected to a screw type concentration unit, and dehydrating an object to be processed concentrated by the screw type concentration unit is provided. As a result, the solid-liquid separation treatment can be performed in two steps by the screw type concentrating part and the rotating body type dehydrating part, as compared with the case where the solid-liquid separation treatment is performed in one step only by the rotating body type dehydrating part as in the conventional case. Therefore, even if the rotation of the screw and the rotation of the rotating body are increased, the water content of the object to be treated can be reduced. As a result, the solid-liquid separation device can obtain a solid-liquid separation system capable of lowering the water content of the object to be treated and efficiently discharging the object to be treated. In addition, by using a screw type concentrating part in the previous stage, the water content of the object to be treated is moderately reduced by the concentration treatment instead of the dehydration treatment, and the object to be treated is supplied to the rotating body type dehydrating part while maintaining fluidity. Therefore, the dehydration treatment can be effectively performed without clogging the rotating body type dehydration portion with the object to be processed.

According to the present invention, as described above, it is possible to provide a solid-liquid separation device and a solid-liquid separation system capable of lowering the water content of the object to be treated and efficiently discharging the object to be treated.

It is the schematic which showed the solid-liquid separation system provided with the solid-liquid separation apparatus by one Embodiment of this invention. It is an enlarged view of the main part of the screw type enrichment part by one Embodiment of this invention. It is a top view which showed the screw type concentration part and the rotary body type dehydration part by one Embodiment of this invention. It is sectional drawing of the side surface which showed the rotating body type dehydration part by one Embodiment of this invention. It is a side view which showed the rotating body type dehydration part by one Embodiment of this invention. FIG. 5 is a cross-sectional view taken 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 one 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 one 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 one Embodiment of this invention. It is a partially enlarged view of the H part of FIG.

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

(Structure of solid-liquid separation system)
An embodiment of the present invention will be described with reference to FIGS. 1 to 10. As shown in FIG. 1, the solid-liquid separation system 100 according to an 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 treated 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.

Specifically, the solid-liquid separation system 100 is configured so that the screw-type concentrating unit 2, which will be 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 which will be described later and is connected to the screw type concentration unit 2. Details will be described later. The gravitational filtration is, for example, a filtration in which the liquid content is squeezed through a small gap or the like, and the solid component and the liquid content are separated by the gravity acting on the liquid content of the object to be treated. Further, the squeeze filtration is a filtration in which a liquid content is squeezed out from the object to be processed by pressurizing (squeezing) the object to be processed. 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 concentration treatment is a treatment for reducing the agglomerated 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. be. The water content of the object to be treated supplied from the agglomerating portion 100b to the screw type concentrating portion 2 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. In the dehydration treatment, the water content of the object to be treated is reduced to, for example, about 70 to about 88%.

(Structure of solid-liquid separator)
Next, the configuration of the solid-liquid separation device 100a will be described with reference to FIGS. 1 to 10.

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. It is provided with a part 5. The screw-type concentrating unit 2 is mainly configured to separate the relatively clear filtrate discharged to the outside of the apparatus from the object to be processed by performing the concentration treatment of the object to be processed. The rotating body type dehydration unit 3 mainly performs the dehydration treatment of the object to be concentrated by the screw type concentration unit 2, so that the relatively dirty filtrate stored in the tank 1 and the filtrate are discharged to the outside of the apparatus. It is configured to separate from the object to be treated (dehydrated cake).

Here, the screw type concentrating unit 2 and the rotating body type dehydrating unit 3 are provided side by side in the horizontal direction. Hereinafter, the direction in which the screw type concentrating unit 2 and the rotating body type dehydrating unit 3 are lined up will be described as the A direction, and the direction in which the screw type concentrating unit 2 and the rotating body type dehydrating unit 3 are aligned will be described as the vertical direction (Z direction) and the direction intersecting the A direction as the B direction.

The tank 1 integrally includes a storage unit 10 and a filtrate receiving unit 11. The storage unit 10 and the filtrate receiving unit 11 are configured to overlap each other in a plan view (viewed from above). Further, the tank 1 is provided with a side wall 3a arranged between the screw type concentrating unit 2 and the rotating body type dehydrating unit 3. The storage portion 10 and the filtrate receiving portion 11 are separated by the side wall 3a. That is, the storage unit 10 and the filtrate receiving unit 11 are configured so that the object to be processed is not directly delivered to each other. Further, in the tank 1, a screw type concentrating unit 2 and a rotating body type dehydrating unit 3 are installed above. Therefore, the screw type concentrating part 2 and the rotating body type dehydrating part 3 are integrally provided via the tank 1.

The storage unit 10 is configured to receive the object to be processed from the object storage tank T and store the object to be processed. Further, the storage unit 10 is configured to store the filtrate that has passed through the second filtration groove S2 (see FIG. 10) described later in the rotary dehydration unit 3. That is, the storage unit 10 is configured to store the filtrate (liquid component of the object to be treated) obtained by the dehydration treatment in the rotary dehydration unit 3.

The storage unit 10 is provided with a stirring pump 10a and a supply pump 10b. The stirring pump 10a supplies the object to be processed supplied to the storage unit 10 from the object storage tank T and the screw type concentration unit 2 and the inorganic coagulant supplied to the storage unit 10 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. Further, the supply pump 10b is configured to supply (return) the aggregated object to be processed, which is stored in the storage unit 10, to the agglomerating unit 100b provided in the front stage of the screw type concentrating unit 2.

The filtrate receiving unit 11 is configured to receive the filtrate that has passed through the first filtration groove S1 (see FIG. 2) described later in the screw type concentrating unit 2. That is, the filtrate receiving unit 11 is configured to receive the relatively clear filtrate (object to be treated) obtained by the concentration treatment in the screw type concentrating unit 2. Further, the filtrate receiving portion 11 is provided with a filtrate discharge port 11a. The filtrate receiving portion 11 is inclined in an oblique direction toward the filtrate discharge port 11a so that the filtrate discharge port 11a side is lowered.

(Screw type concentrator)
As shown in FIG. 1, the screw type concentrating unit 2 is connected to the screw type concentrating unit supply port 20 to which the object to be processed is supplied from the agglomerating unit 100b (mixing tank 6 described later) and the subsequent stage of the screw type concentrating unit 2. A screw-type concentrating unit discharge port 21 for discharging (supplying) an object to be processed is included in the rotating body-type dehydrating unit 3. The screw-type concentrator discharge port 21 is an example of a “discharge port” within the scope of the claims.

The screw-type concentrating unit discharge port 21 connects the screw-type concentrating unit 2 and the rotating body-type dehydrating unit 3, and transfers the object to be processed between the screw-type concentrating unit 2 and the rotating body-type dehydrating unit 3. It is provided inside. The connecting portion 9 is an annular flat portion in which the screw type concentrating portion 2 and the rotating body type dehydrating portion 3 are in contact with each other. The screw-type concentrating unit discharge port 21 is a through hole provided inside the connecting portion 9 and connecting the internal region of the screw-type concentrating unit 2 and the internal region of the rotating body-type dehydrating unit 3. Further, the screw-type concentrating unit 2 puts the object to be processed into the rotating body-type dehydrating unit 3 along the axial direction (A direction) of the first rotating shaft 22a, which will be described later, via the screw-type concentrating unit discharge port 21. It is configured to discharge from the side. That is, the screw type concentrating unit 2 does not have a back pressure plate, and the object to be processed is compressed by a back pressure plate provided near one end of the screw on the discharge port side like a general screw type dehydrator, and is lowered. It does not discharge to. The axial direction (A direction) of the first rotation shaft 22a is a substantially horizontal direction.

As shown in FIG. 2, the screw type concentrating unit 2 includes a screw 22, a laminated filter body 23 having a plurality of movable plates 23a and a plurality of fixing plates 23b, a first motor 24 (see FIG. 1), and an outside. The frame 25 and the like are included. Both the movable plate 23a and the fixed plate 23b (laminated filter body 23) have an annular shape. That is, the movable plate 23a and the fixed plate 23b have a circular through hole 230 at the center.

The screw 22 is configured to be inserted through the through hole 230. Further, the screw 22 has a first rotation shaft 22a and a blade portion 22b. Further, the screw 22 is configured to rotate with the rotation of the first motor 24. Further, the screw 22 is configured to send the object to be processed supplied from the screw type concentrating unit supply port 20 to the rotating body type dehydration unit 3 (see FIG. 1) as the first rotating shaft 22a rotates. Further, the screw 22 (first rotating shaft 22a) extends in the direction (A direction) in which the screw type concentrating unit 2 and the rotating body type dehydrating unit 3 are aligned.

The blade portion 22b is provided on the side surface of the first rotating shaft 22a. Further, the blade portion 22b extends spirally along the axial direction (A direction) of the first rotation shaft 22a. Further, the blade portions 22b are formed by one continuous blade, and are formed so that the pitches of the first rotating shaft 22a in the axial direction (A direction) are substantially equal. Further, the laminated filter body 23 has a multi-plate structure in which the movable plate 23a and the fixing plate 23b are alternately laminated in the A direction in a state where the screw 22 is inserted into the through hole 230 so as to surround the screw 22. is doing.

Further, the plurality of fixing plates 23b each have a screw hole 231a into which the spacer 231b is screwed, in addition to the through hole 230 through which the screw 22 is inserted. Then, the spacer 231b is configured to hold a gap D1 in the A direction between the fixing plates 23b adjacent to each other by being screwed into the screw hole 231a. As a result, a first filtration groove S1 having a gap D1 is formed between the adjacent fixing plates 23b. In FIG. 2, only one set of a plurality of spacers 231b and a plurality of screw holes 231a provided continuously in the A direction is shown, but in reality, a plurality of sets are provided in the circumferential direction of the fixing plate 23b. ing.

The thickness D2 of the movable plate 23a in the A direction is smaller than the gap D1. Therefore, a filter water outflow groove G1 in the gap (D1-D2) is formed in the portion of the first filtration groove S1 between the adjacent fixing plates 23b except for the movable plate 23a. That is, the filter water outflow groove G1 is a gap portion between the two movable plates 23a arranged adjacent to each other in the A direction and the fixing plate 23b. Therefore, the movable plate 23a is configured to be swingable in the axial direction (A direction) of the first rotating shaft 22a. The gap (D1-D2) is the total of the gap on one side of the movable plate 23a in the A direction and the gap on the other side.

The outer frame 25 is configured to fix the plurality of fixing plates 23b to each other. Specifically, the outer frame 25 is arranged in contact with the outer peripheral ends of the plurality of fixing plates 23b. Further, the outer frame 25 extends along the axial direction (A direction) of the first rotation shaft 22a. Further, a plurality (for example, three) contact portions of the outer frame 25 with the fixing plate 23b are provided in the circumferential direction of the fixing plate 23b (only one contact portion is shown in FIG. 2). The plurality of fixing plates 23b are configured to maintain a laminated state with the movable plate 23a by being fixed to the outer frame 25. Further, the movable plate 23a always moves in the circumferential direction and the radial direction of the first rotation shaft 22a of the screw 22 as the inner peripheral surface forming the through hole 230 abuts on the outer peripheral portion of the screw 22 and the screw 22 rotates. It is configured to be. As described above, in the screw type concentrating unit 2, the filter water outflow groove G1 (first filtration groove S1) is clogged by constantly moving the movable plate 23a in the first filtration groove S1 by the rotation of the screw 22. Can be suppressed. That is, the screw type concentrating unit 2 can self-clean the filter water outflow groove G1 (first filtration groove S1).

The screw type concentrator 2 is configured to rotate the screw 22 at a faster rotation speed as compared with a general screw type dehydrator. As a specific example, the rotation speed of a general screw type dehydrator is 1 to 5 rotations per minute, whereas the screw type concentrator 2 has a rotation speed of 10 to 50 rotations per minute, which is about 10 times higher. It is configured to rotate 22. Further, the screw 22 of the screw type concentrating unit 2 is configured to rotate at a rotation speed faster than that of the rotating body 30 of the rotating body type dehydrating unit 3, which will be described later.

Further, as compared with a general screw type dehydrator, the screw type concentrating unit 2 is not provided with a back pressure plate, and the blade portions 22b are configured at an equal pitch, so that the internal pressure during the concentrating process is performed. Is small. Therefore, the screw type concentrating unit 2 has a simple structure such that the thickness of each component is thinner and the number of each component is smaller than that of the screw type dehydrator. In short, the screw type concentrator 2 does not have a structure as robust as the screw type dehydrator. Further, the screw-type concentrator 2 has a length of the laminated filter body 23 in the stacking direction (A direction) of about one-third to one-half as compared with a general screw-type dehydrator. It is configured to be.

The first motor 24 is provided at an end portion of the first rotating shaft 22a on the opposite side (upstream side) of the rotating body type dehydration portion 3 side. Specifically, as described above, unlike the general screw type dehydrator, the screw type concentrator 2 has substantially equal pitches in the axial direction (A direction) of the blade parts 22b, and has a relatively water content ( It is configured to process an object to be treated with high fluidity). Therefore, the screw type concentrator 2 can rotate the screw 22 with a smaller torque than the screw type dehydrator. Further, in consideration of the arrangement space of the first motor 24 in addition to the torque, the first motor 24 of the screw type concentrating unit 2 is different from the motor of the screw type dehydrator, and the rotating body type dehydration of the first rotating shaft 22a is performed. It is provided at the end on the opposite side (upstream side) from the portion 3 side.

As shown in FIG. 3, a plurality (two) of screw type concentrating units 2 are provided. Further, the plurality of screw type concentrating units 2 are arranged side by side in parallel with the axial direction (B direction) of the second rotating shaft 310, which will be described later, of the rotating body type dehydrating unit 3.

(Rotating body type dehydration part)
As shown in FIG. 4, the rotating body type dehydrating unit 3 includes a side wall 3a, a plurality of rotating bodies 30, a plurality of second motors 31 (see FIG. 5), a baffle plate 32, a sludge scraping plate 33, and the like. It is equipped with a discharge chute 34 and a water level gauge 35. The baffle plate 32 is an example of a "plate-shaped member" within the scope of the claims.

The side wall 3a is a plate-shaped member extending in directions orthogonal to the A direction (vertical direction and B direction). Further, the side wall 3a is provided at the end of the rotating body type dehydration part 3 on the screw type concentration part 2 side. Further, the side wall 3a is provided with a connecting portion 9 for connecting the rotating body type dehydrating portion 3 and the screw type concentrating portion 2.

The rotating body 30 includes a laminated rotating filter body 300 and a second rotating shaft 310 extending in the B direction inserted through the laminated rotating filter body 300.

A plurality of stacked rotary filters 300 are arranged in two rows above and below toward the solid discharge port E so as to send the object to be processed to the solid discharge port E. Specifically, the six stacked rotating filters 300 in the lower row are arranged at predetermined intervals, and rotate in the same direction (clockwise in FIG. 1) to solidify the object to be processed. It is configured to send to the outlet E. Further, the four stacked rotating filters 300 in the upper row are arranged at predetermined intervals, and are arranged in opposite directions (counterclockwise in FIG. 1) to the stacked rotating filters 300 in the lower row. It is configured to send the object to be processed to the solid discharge port E by rotating.

As shown in FIGS. 6 and 7, the stacked rotary filter body 300 includes a plurality of filter pieces stacked along the second rotation axis 310.

Specifically, as shown in FIG. 8, 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 disc filter piece 301 is formed of, for example, a resin material. The small-diameter disk filter piece 302 and the large-diameter disk filter piece 303 are formed of, for example, a metal material.

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 second 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 second rotating shaft 310 via the through hole 304. Therefore, the medium-diameter disk filter piece 301, the small-diameter disk filter piece 302, and the large-diameter disk filter piece 303 do not substantially move in the direction intersecting the axial direction (B direction) of the second rotation shaft 310. It is configured as follows.

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 second rotating shaft 310 is inserted into the through hole 304 so as to surround the second rotating shaft 310. It has a multi-plate structure in which disk strips 303 are alternately laminated in the B direction. A plurality of medium-diameter disk filter pieces 301, small-diameter disk filter pieces 302, and large-diameter disk filter pieces 303 are provided on the stacked rotating filter body 300 of one rotating body 30, respectively.

The plurality of medium-diameter disc filter pieces 301 are provided so as to be arranged at predetermined intervals in the B 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 B 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 B direction. Are repeatedly arranged (laminated) to form a structure. Alternatively, each filter piece 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.

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 B 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. 9, 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 B direction, and the convex portion 301c is brought into contact with the other convex portion 301c in the B 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.

Further, a second filtration groove S2 (see FIG. 10) having a gap (d1 + d2) is formed between the two adjacent medium-diameter disc filter pieces 301 (plate-shaped portion 301a) by the convex portion 301b and the convex portion 301c. ing.

As shown in FIG. 8, 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) notches 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 overlapping the convex portions 301b and the convex portions 301c of the medium-diameter disc filter piece 301 in the B direction. Further, the cutout portion 302a is configured to engage with the convex portion 301b. The small-diameter disc filter piece 302 is formed between 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. Is located in.

As shown in FIG. 10, 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. ..

That is, a filter water outflow groove G21 having a gap (d1 + d2-d3) is formed in a portion of the second filtration groove S2 between two adjacent medium-diameter disk filter pieces 301 except for the small-diameter disk filter piece 302. .. Therefore, the small-diameter disk filter piece 302 is configured to be swingable in the swing range α in the B direction in which the second 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 second rotating shaft 310 and rotates while rubbing the side surface of the medium-diameter disk filter piece 301. 2 It is possible to suppress clogging of the filtration groove S2). That is, the rotating body type dehydration unit 3 can self-clean the filter water outflow groove G21 (second 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.

As shown in FIG. 8, 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 B 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 portions) 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 301a).

As shown in FIG. 10, 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. There is.

That is, a filter water outflow groove G22 having a gap (d1 + d2-d4) is formed in a portion of the second filtration groove S2 between two adjacent medium-diameter disk filter pieces 301 except for the large-diameter disk filter piece 303. There is. Therefore, the large-diameter disc filter piece 303 is configured to be swingable in the swing range β in the B direction in which the second 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 second 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 second filtration groove S2). That is, the rotating body type dehydration unit 3 can self-clean the filter water outflow groove G22 (second 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.

The rotating body type dehydrating unit 3 is configured to rotate the second motor 31 (second rotating shaft 310) at a faster rotation speed as compared with a general rotating body type dehydrating device. As a specific example, while the rotation speed of a general rotating body type dehydrator is 0.5 rotations per minute, the rotating body type dehydrating unit 3 has a second motor at a rotation speed of about 1 rotation per minute, which is about twice as high. It is configured to rotate 31 (second rotation shaft 310).

As shown in FIG. 7, the large-diameter disk frame 303 of the rotating body 30 in the upper row (lower row) and the large-diameter disk frame 303 of the rotating body 30 in the other upper row (lower row) adjacent to each other are They are arranged alternately so as to overlap each other in the B direction. That is, the large-diameter disk filter piece 303 of the rotating body 30 in the upper row (lower row) sandwiches the small-diameter disk filter piece 302 of the rotating body 30 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 30 in the upper row (lower row) and the medium-diameter disk frame 301 of the rotating body 30 in the other adjacent upper row (lower row) are approximately omitted in the B direction. It is provided in the same range (position).

As shown in FIG. 6, the second motor 31 is provided at one end in the axial direction (B direction) of each of the second rotating shafts 310 of the plurality of stacked rotary filter bodies 300. Further, the second motor 31 is provided for each of a plurality of (10) stacked rotating filters 300 (every rotating body 30). Further, instead of providing the second motor 31 for each laminated rotary filter body 300, the second motor 31 is provided in some of the laminated rotary filter bodies 300, and the laminated rotary filter without the second motor 31 is provided. It may be configured to transmit power to the body 300 by a chain or the like.

As shown in FIG. 1, the baffle plate 32 is arranged between the side wall 3a that separates the screw type concentrating part 2 and the rotating body type dehydrating part 3 of the tank 1 and the rotating body 130 arranged at the uppermost stream in the lower row. ing. Further, the baffle plate 32 is arranged so as to fill a gap between the side wall 3a and the rotating body 130. The rotating body 130 is an example of the "lower row most upstream rotating body" in the claims.

The sludge scraping plate 33 is provided on each of the most downstream rotating body 30 in the lower row and the most downstream rotating body 30 in the upper row, and is clogged between the laminated rotating filters 300 of the rotating bodies 30. It is configured to scrape and remove solids.

As shown in FIG. 3, the discharge chute 34 is provided in the solid discharge port E (see FIG. 1) and constitutes a discharge path for the discharge discharged from the rotating body type dehydration unit 3. Further, the discharge chute 34 includes a pair of horizontal plates 34a facing the first rotating shaft 22a in the axial direction (B direction) and a bottom plate 34b connecting the lower ends of the pair of horizontal plates 34a.

As shown in FIG. 1, the water level gauge 35 is provided on the inner upper surface of the rotating body type dehydration unit 3. Further, the water level gauge 35 is provided above (Z1 direction) the rotating body 131 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 35, 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 131 is an example of the "upper row most upstream rotating body" in the claims.

The storage unit coagulant supply unit 4 is configured to supply the inorganic coagulant to the object to be treated supplied to the storage unit 10. Further, 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 is arranged at the uppermost stream in the lower row of the rotating body type dehydrating unit 3 with respect to the object to be processed discharged from the screw type concentrating unit discharge port 21 of the screw type concentrating unit 2. It is configured to supply from above the rotating body 130. 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 30.

(Arrangement of connection part between screw type concentrating part and rotating body type dehydrating part)
As shown in FIG. 4, the connecting portion 9 is provided in the vicinity of the rotating body 130 arranged in the uppermost stream of the lower row among the plurality of rotating bodies 30 described later in the rotating body type dehydration unit 3. Further, the connecting portion 9 is provided above the rotating body 130 (in the Z1 direction).

Further, the connecting portion 9 is provided below the water level gauge 35 of the rotating body type dehydrating portion 3 (in the Z2 direction). Further, the connecting portion 9 is provided below (Z2 direction) the rotating body 131 arranged at the uppermost stream of the upper row among the plurality of rotating bodies 30. That is, the connecting portion 9 is provided between the rotating body 131 arranged in the uppermost stream in the upper row and the rotating body 130 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 unit 2 extends in the substantially horizontal direction (A direction), the screw type concentrating unit 2 is processed toward between the rotating body 131 and the rotating body 130. It is configured to supply (discharge (load)) the object to be processed to the rotating body type dehydration unit 3 by pushing the object.

Further, the lower end 9a of the connecting portion 9 is arranged at substantially the same height as the end portion 32a on the connecting portion 9 side of the baffle plate 32.

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

The aggregating section 100b includes a mixing tank 6, a mixing tank aggregating agent supply section 7, and an impeller 8. The mixing tank 6 is configured so that the object to be processed is supplied from the storage portion 10 of the solid-liquid separation device 100a. Further, the mixing tank 6 includes a mixing tank discharge port 6a that discharges the object to be processed by overflowing and supplies the object to be processed to the screw type concentrating unit 2. The mixing tank coagulant supply unit 7 is configured to supply the polymer coagulant to the mixing tank 6. The impeller 8 is arranged in the mixing tank 6. Further, the impeller 8 is provided with a third motor 8a as a drive source. The impeller 8 is configured to aggregate the object to be treated (increase the concentration of the solid component (flock)) by stirring the object to be treated supplied to the mixing tank 6 and the polymer coagulant. There is.

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

In the present embodiment, as described above, the screw type concentrating unit 2 including the screw 22 and the laminated filter body 23 on which the first filtration groove S1 is formed and concentrating the object to be processed, and the laminated rotary filter 300 A rotating body type dehydrating unit 3 is provided, which includes a rotating body 30 having a screw, and is connected to the screw type concentrating unit 2 to dehydrate the object to be processed concentrated by the screw type concentrating unit 2. As a result, the solid-liquid separation process is performed in two steps by the screw type concentrating unit 2 and the rotating body type dehydration unit 3, as compared with the case where the solid-liquid separation process is performed in one step only by the rotary body type dehydration unit 3 as in the conventional case. Therefore, even if the rotation of the screw 22 and the rotation of the rotating body 30 are increased, the water content of the object to be treated can be reduced. As a result, the solid-liquid separation device 100a can reduce the water content of the object to be treated and efficiently discharge the object to be treated. Further, by using the screw type concentrating unit 2 in the previous stage, the water content of the object to be treated is moderately reduced by the concentration treatment instead of the dehydration treatment, and the object to be processed is transferred to the rotating body type dehydration unit 3 while maintaining fluidity. Since it can be supplied, the dehydration treatment can be effectively performed without clogging the rotating body type dehydration unit 3 with the object to be processed.

Further, in the present embodiment, as described above, the screw type concentrating unit 2 and the rotating body type dehydration unit 3 are connected, and the object to be processed is delivered between the screw type concentrating unit 2 and the rotating body type dehydration unit 3. The portion 9 is provided near the rotating body 130 arranged in the uppermost stream of the lower row among the plurality of rotating bodies 30, and above the rotating body 130. As a result, the connecting portion 9 for delivering the object to be processed is provided in the vicinity of the rotating body 130 arranged at the uppermost stream in the lower row, so that the screw type concentrating unit 2 is filled with water even when the water level in the rotating body type dehydration unit 3 is low. Since the state can be maintained, it is possible to push the screw type concentrating unit 2 into the water head and perform the concentrating process more efficiently. Further, the object to be processed can be supplied (charged) to the rotating body type dehydration unit 3 from a relatively low height position. As a result, unlike the case where the object to be processed is supplied to the rotating body type dehydrating unit 3 from a relatively high height position, the object to be processed is processed when the object to be processed is supplied to the rotating body type dehydrating unit 3 via the connecting portion 9. Since the impact applied to the object can be suppressed, it is possible to prevent the flocs in the object to be processed from collapsing due to the impact.

Further, in the present embodiment, as described above, the rotating body type dehydration unit 3 is provided with the water level gauge 35 arranged above the rotating body 130, and the connecting portion 9 is arranged below the water level meter 35. As a result, the object to be processed can be directly supplied from the screw type concentrating unit 2 to the object to be processed inside the rotating body type dehydration unit 3 via the connecting portion 9. 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 further suppress the collapse of the flocs in the object to be treated.

Further, in the present embodiment, as described above, the connecting portion 9 is provided below the rotating body 131 arranged in the uppermost stream of the upper row of the plurality of rotating bodies. As a result, the connecting portion 9 is provided at a height position between the rotating body 131 and the rotating body 130, so that the object to be processed is placed between the rotating body 30 in the upper row and the rotating body 30 in the lower row from the connecting portion 9. Can be supplied towards. As a result, a force for pushing the object to be processed can be applied between the rotating body 30 in the upper row and the rotating body 30 in the lower row. As a result, the object to be processed can be effectively conveyed in the rotating body type dehydration unit 3.

Further, in the present embodiment, as described above, the rotating body type dehydration unit 3 is arranged so as to fill the gap between the side wall 3a provided with the connecting portion 9 and the side wall 3a and the rotating body 130. And is provided, and the lower end 9a of the connecting portion 9 is arranged at a position substantially the same height as the end portion 32a on the connecting portion 9 side of the baffle plate 32. As a result, the gap between the side wall 3a and the rotating body 130 can be filled by the baffle plate 32, so that the object to be processed is prevented from flowing out from between the side wall 3a and the rotating body 130 without being dehydrated. can do.

Further, in the present embodiment, as described above, the screw 22 of the screw type concentrating unit 2 is configured to rotate at a rotation speed faster than that of the rotating body 30 of the rotating body type dehydrating unit 3. Here, the screw type concentrating unit 2 mainly performs gravitational filtration, and the rotating body type dehydrating unit 3 mainly performs squeezing filtration that requires a larger torque than the gravitational filtration. Then, with the above configuration, the dehydration process can be performed by rotating the rotating body 30 of the rotating body type dehydrating unit 3 at a relatively low speed, so that a large torque can be easily generated in the rotating body 30. It is possible to reliably perform dehydration treatment by squeezing and filtering.

Further, in the present embodiment, as described above, the filtrate receiving portion 11 for receiving the filtrate passing through the first filtration groove S1 of the screw type concentrating portion 2 and the filtrate receiving portion 11 are separated and arranged. A tank 1 is provided that integrally includes a storage unit 10 for storing the filtrate that has passed through the second filtration groove S2 of the rotary body type dehydration unit 3, and the object to be processed stored in the storage unit 10 is collected in the screw type concentration unit 2. The solid-liquid separation device 100a is configured so as to be returned to the previous stage of the above. As a result, the relatively clear filtrate having a low solid content is received by the filtrate receiving unit 11 and discharged to the outside of the apparatus, and the relatively dirty filtrate having a high solid content can be stored in the storage portion 10. Further, the apparatus configuration can be simplified as compared with the case where the filtrate receiving unit 11 and the storage unit 10 are separated. Further, as compared with the filtrate discharged from the screw type concentrating section 2, the dirty filtrate discharged from the rotating body dehydrating section 3 and containing a large amount of solid components is recirculated to reliably treat the object to be treated. Can be done.

Further, in the present embodiment, as described above, the screw type concentrating unit 2 discharges the object to be processed from the side of the rotating body type dehydrating unit 3 to the inside along the axial direction of the first rotating shaft 22a. The concentrator discharge port 21 is provided. As a result, the object to be processed can be discharged in the axial direction of the first rotating shaft 22a by the screw type concentrating unit discharge port 21, so that a force pushing in the axial direction is applied to the object to be processed inside the rotating body type dehydrating unit 3. Can act. As a result, the object to be processed can be effectively conveyed in the rotating body type dehydration unit 3.

(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 above embodiment, an example in which two screw-type concentrators (screw-type concentrators) are provided has been shown, but the present invention is not limited to this. In the present invention, one or three or more screw type concentrators (screw type concentrator) may be provided.

Further, in the above-described embodiment, an example in which the first rotation axis of the screw type concentrator (screw type concentrator) is arranged substantially horizontally is shown, but the present invention is not limited to this. In the present invention, the first rotation axis of the screw type concentrator (screw type concentrator) may be inclined and arranged.

Further, in the above-described embodiment, an example in which the height position of the connecting portion is arranged in the vicinity of the most upstream rotating body in the lower row is shown, but the present invention is not limited to this. In the present invention, if the object to be processed is properly supplied between the rotating body in the upper row and the rotating body in the lower row, the height position of the connecting portion is not in the vicinity of the most upstream rotating body in the lower row. You may.

Further, in the above embodiment, an example in which the medium-diameter disk filter piece is formed so that the amount of protrusion of the convex portion on one surface of the medium-diameter disk filter piece and the amount of protrusion of the convex portion on the other surface are different from each other. However, the present invention is not limited to this. In the present invention, the medium-diameter disc filter piece may be formed so that the amount of protrusion of the convex portion on one surface of the medium-diameter disk filter piece and the amount of protrusion of the convex portion on the other surface are the same as each other. ..

Further, in the above-described embodiment, an example in which convex portions are formed on one surface and the other surface of the medium-diameter disk filter piece is shown, but the present invention is not limited to this. In the present invention, a convex portion may be formed on only one surface of the medium-diameter disk filter piece and one of the other surfaces.

Further, in the above-described embodiment, an example in which a water level gauge is provided in the rotating body type dehydration unit is shown, but the present invention is not limited to this. In the present invention, it is not necessary to provide a water level gauge in the rotating body type dehydration unit.

Further, in the above-described embodiment, an example is shown in which the object to be processed stored in the tank is returned (recirculated) to the screw type concentrator (screw type concentrator). Not exclusively. In the present invention, the object to be processed stored in the tank does not have to be returned to the screw type concentrator (screw type concentrator).

Further, in the above embodiment, an example is shown in which the second motor of the rotating body type dehydrating unit (rotary body type dehydrating device) is arranged only on one side in the axial direction of the second rotating shaft, but the present invention is not limited to this. .. In the present invention, the second motors of the rotating body type dehydrating unit (rotary body type dehydrating device) may be alternately arranged on one side and the other side in the axial direction of the second rotating shaft.

Further, in the above-described embodiment, an example is shown in which a polymer flocculant or an inorganic flocculant is supplied to the rotating dehydrator, but the present invention is not limited to this. In the present invention, the polymer flocculant or the inorganic flocculant may be supplied to the subsequent stage (downstream) of the screw type concentrator. In this way, the polymer flocculant or the inorganic flocculant is supplied to the rear stage of the screw type concentrating part and / or the front stage of the rotary body type dehydration part (above the rotating body arranged in the uppermost stream in the lower row of the rotary body type dehydration part). By configuring the screw-type concentrator, for example, the screw-type concentrator will inject the coagulant again into the object to be treated whose fluidity has been lowered to a predetermined content. Compared to the one in which the coagulant is injected in the previous stage, the chances of contact between the solid particles of the suspended sewage and the coagulant particles can be increased, and the coagulation treatment can be performed more effectively. Has been done.

1 Tank 2 Screw type concentrator (screw type concentrator)
3 Rotating body type dehydrator (rotary body type dehydrator)
3a Side wall 6 Mixing tank 9 Connection part 9a Lower end 10 Storage part 11 Filtrate receiving part 21 Screw type concentrating part Discharge port (discharge port)
22 Screw 22a 1st rotating shaft 23 Laminated filter body 30 Rotating body 32 Baffle plate (plate-shaped member)
32a End 35 Water level gauge 100 Solid-liquid separation system 100a Solid-liquid separation device 130 Rotating body (lower row most upstream rotating body)
131 Rotating body (upper row most upstream rotating body)
300 Laminated rotating filter body 310 2nd rotating shaft S1 1st filtration groove S2 2nd filtration groove

Claims (9)

A screw having a first rotation shaft and feeding the supplied object to be processed with the rotation of the first rotation shaft, and a laminated filter body arranged so as to surround the screw and having a first filtration groove formed therein. A screw-type concentrator that concentrates the object to be treated, including
Includes a plurality of rotating bodies arranged in two upper and lower rows having a second rotating shaft and a laminated rotating filter body arranged along the axial direction of the second rotating shaft and having a second filtration groove formed therein. A rotary body type dehydration unit connected to the screw type concentration unit and dehydrating the object to be processed concentrated by the screw type concentration unit .
Further provided with a connecting portion for connecting the screw type concentrating unit and the rotating body type dehydrating unit.
The connection portion is a solid-liquid separation device provided below the solid discharge port of the rotary body type dehydration portion. Connected to the screw concentrator unit and said rotator type dewatering unit, the connecting portion to pass an object to be processed between said screw concentrator unit and the rotating member type dewatering unit, out under the column of the plurality of rotating bodies The solid-liquid separator according to claim 1, which is provided in the vicinity of the lower row most upstream side rotating body arranged in the uppermost stream of the above and above the lower row most upstream side rotating body. The rotary body type dehydration unit includes a water level gauge provided above the uppermost stream side rotary body in the lower row.
The solid-liquid separation device according to claim 2, wherein the connection portion is provided below the water level gauge. The solid-liquid separation device according to claim 3, wherein the connecting portion is provided below the uppermost stream rotating body arranged in the uppermost stream of the plurality of rotating bodies. The rotating body type dehydrating part includes a side wall provided with the connecting part and a plate-shaped member arranged so as to fill a gap between the side wall and the lower row most upstream side rotating body.
The solid-liquid separation device according to any one of claims 2 to 4, wherein the lower end of the connecting portion is arranged at a position substantially the same height as the end portion of the plate-shaped member on the connecting portion side. The solid-liquid separation according to any one of claims 1 to 5, wherein the screw of the screw-type concentrating unit is configured to rotate at a rotation speed faster than that of the rotating body of the rotating body-type dehydrating unit. Device. The filtrate receiving portion that receives the filtrate that has passed through the first filtration groove of the screw type concentrating portion and the filtrate receiving portion are provided separately and pass through the second filtration groove of the rotary body type dehydration portion. Further equipped with a tank that integrally includes a storage unit for storing the filtrate,
The solid-liquid separation device according to any one of claims 1 to 6, wherein the object to be processed stored in the storage unit is configured to be returned to the screw type concentration unit. Any one of claims 1 to 7, wherein the screw-type concentrating unit includes a discharge port for discharging an object to be processed from the side of the rotating body-type dehydrating unit to the inside along the axial direction of the first rotating shaft. The solid-liquid separator according to the section. A screw having a first rotation shaft and feeding the supplied object to be processed with the rotation of the first rotation shaft, and a laminated filter body arranged so as to surround the screw and having a first filtration groove formed therein. A screw-type concentrator that concentrates the object to be processed, including
Includes a plurality of rotating bodies arranged in two upper and lower rows having a second rotating shaft and a laminated rotating filter body arranged along the axial direction of the second rotating shaft and having a second filtration groove formed therein. , A rotary body type dehydrator connected to the screw type concentrator and dehydrating the object to be processed concentrated by the screw type concentrator.
The filtrate receiving portion that receives the filtrate that has passed through the first filtration groove of the screw type concentrator and the filtrate receiving portion are separated from each other and pass through the second filtration groove of the rotary dehydrator. A tank that integrally contains a storage unit that stores the filtrate,
An object to be processed is supplied from the tank, and the solid components of the supplied object to be processed are aggregated and flocculated, and an admixture tank for supplying the object to be processed to the screw type concentrator is provided .
Further provided with a connection portion for connecting the screw type concentrator and the rotary body type dehydrator.
The connection portion is a solid-liquid separation system provided below the solid discharge port of the rotary dehydrator.

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