JP3522702B2 - Screw press filter - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a screw press type in which a screw inserted into a generally cylindrical filter body is rotated to convey a processed material supplied from one end side to the other end side while filtering the processed material. The present invention relates to a filter device, and more particularly to a screw press type filter device provided with a cleaning means for injecting a cleaning liquid on the outer periphery of the filter body.

[0002]

2. Description of the Related Art As a screw press type filtering device equipped with this type of cleaning means, for example, a cleaning pipe having an annular shape slightly larger than this filtering body is provided on the outer periphery of a cylindrical filtering body as the cleaning means. , Nozzles for injecting a cleaning liquid are provided on the inner circumference of the cleaning pipe at intervals in the circumferential direction,
It has been proposed to make this cleaning pipe movable in the direction of the rotation axis of the screw, and to move the cleaning pipe while injecting the cleaning liquid from the nozzle so as to clean the outer circumference of the filter body over its entire length. ing. Further, instead of moving the cleaning pipe in this way, by rotating the screw in the direction opposite to the rotation direction at the time of filtration, the filter body and the screw can be engaged and disengaged so that the filter body rotates. It has also been proposed to clean the outer circumference of the filter body over the entire circumference while fixing the cleaning tube as the cleaning means.

[0003]

Here, FIG. 9 shows the former one of these, the cleaning pipe M as a cleaning means for injecting the cleaning liquid L from the nozzle K, and the outer periphery of the filter body N to be cleaned by the cleaning pipe M. The cleaning liquid L sprayed from the nozzle K of this kind is usually in the shape of a cone, that is, the center line of the nozzle K, as shown in FIG. It is common to inject in a conical shape centered on. However, when the cleaning liquid L is sprayed in a cone shape in this manner, the supply amount and the supply pressure of the cleaning liquid L are relatively high around the center line of the cone, while the supply amount and the supply pressure are small on the outer peripheral side of the cone. Therefore, the cleaning liquid L does not sufficiently spread to the intermediate portion corresponding to between the nozzles K adjacent to each other in the circumferential direction of the cleaning pipe M on the outer periphery of the filter body N, so that the cleaning pipe is moved in the rotation axis direction of the screw. However, there is a possibility that deposits and the like may remain on the outer periphery of the filter body N along the intermediate portion. This is also the case when the latter washing tube is fixed and the filter body is rotated.

The present invention has been made under such a background, and the cleaning means can be moved with respect to the filter body as described above, or conversely, the filter body can be rotated with respect to the cleaning means. It is an object of the present invention to provide a screw press type filtration device capable of reliably removing deposits by uniformly cleaning the entire outer periphery of the filter body.

[0005]

SUMMARY OF THE INVENTION In order to solve the above problems and achieve such an object, the present invention provides a screw which is rotatably inserted into the inner periphery of a cylindrical filter body. A processed product supplied between one end side of the filter body and the filter body, while being conveyed to the other end side by rotation of the screw, is a screw press type filtration device for filtering by the filter body, A large number of webs are
Each of the wires is in the direction of the rotation axis of the screw.
Extend and filter each other in the circumferential direction of the filter.
While arranged side by side, a cleaning means for cleaning the filter body by injecting a cleaning liquid toward the filter body is arranged on the outer periphery of the filter body, and the cleaning means and the above a filter body in the circumferential direction of the relative said filter body and move <br/> rotatably, the cleaning liquid, toward a circumferential direction of the filter body
No a flat and plane-like Te, characterized in that sprayed toward the the filtration body.

Therefore, in the screw press type filtering device constructed as described above, even if the supply amount and the supply pressure of the cleaning liquid to the individual nozzles are the same, the injection area is small due to the flatness of the cleaning liquid, and conversely. Since the supply pressure to the outer periphery of the filter body and the supply amount per unit area are large, it is possible to spray a sufficient amount and pressure of the cleaning liquid onto the outer periphery of the filter body even at the end portion ejected in a plane. Further, such a flattening direction of the cleaning liquid is directed in the relative movement direction between the filter body and the cleaning means, that is, in the circumferential direction of the filter body when the filter body rotates with respect to the cleaning pipe as described above. As the filter body and the cleaning means move relative to each other, the cleaning liquid jetted in a plane also moves relative to the filter body in a state where the width direction thereof intersects the relative movement direction. The entire outer circumference of the filter body is uniformly and surely washed. The relative movement between the filter body and the cleaning means is, in addition to the case described above, for example, as in the embodiment of the present invention described below, so as to extend in the rotation axis direction of the screw on the outer periphery of the filter body. The cleaning pipe provided in the above may be rotatable in the circumferential direction of the filter body. Further, particularly when the cleaning means itself moves relative to the filter body as described above, the cleaning means is provided between the cleaning means and a supply source for supplying the cleaning liquid to the cleaning means. If the connecting pipe capable of following the relative movement of the cleaning means with respect to the filter body is provided, the cleaning liquid can be reliably supplied from the supply source to the cleaning means regardless of the moving position of the cleaning means.

[0007]

1 to 6 show an embodiment of the present invention. In the screw press type filtration device of the present embodiment, a horizontally long box-shaped casing 2 is placed on a pedestal 1 and the inside thereof serves as a filtration chamber 3.
The screw 4 is arranged in the filtration chamber 3 with its rotation axis O being horizontal. This screw 4 has the above-mentioned axis O
A screw blade 4B is spirally formed on the outer periphery of the screw shaft 4A around the center of the screw shaft 4A.
It is rotatably supported by bearings 5 and 5 protruding from A and 2B, and at one end side (the left side in FIGS. 1 and 2) of the screw 4, the screw blades 4B together with the screw blades 4B are formed through holes formed in the outer wall 2A. The shaft 4A is projected, and the periphery thereof is covered by a bottomed cylindrical cover 2C. In addition, the other end of the screw 4 (see FIG. 1,
A gear 4C is attached to an end portion of a screw shaft 4A supported by a bearing 5 (on the right side in FIG. 2), and a drive device 6 such as a motor arranged at a lower side portion of the gantry 1 is connected via a chain 7 to this chain. By being connected to the wheel 4C, the screw 4 is rotatable around the axis O and conveys the processed material supplied from one end side to the other end side.

In this embodiment, both the twist angle and the outer diameter of the screw blade 4B are constant,
The outer diameter of the screw shaft 4A is gradually increased from one end side to the other end side, and the space between the screw blades 4B adjacent to each other in the axis O direction on the outer periphery of the screw shaft 4A is a processed product. The other end side is made smaller than the one end side in accordance with the water content. However, instead of changing the outer diameter of the screw shaft 4A so as to increase on the other end side,
The outer diameter of the screw shaft 4A is kept constant, and the pitch of the screw blades 4B is reduced toward the other end side to reduce the above space on the other end side, or in combination, the other end of the screw shaft 4A By increasing the outer diameter and decreasing the pitch of the screw blades 4B, the space may be reduced on the other end side in accordance with the water content of the treated material.

On the other hand, the screw 4 is provided in the filtration chamber 3.
Partition walls 8A and 8B having holes through which the screw 4 is inserted are provided in accordance with the positions of the substantially central portion in the direction of the axis O and the other end of the portion where the screw blades 4B are provided. By the partition walls 8A and 8B, the inside of the filtration chamber 3 is, in order from the one end side to the other end side, the first filtration chamber 3A between the outer wall 2A on one end side of the casing 2 and the partition wall 8A on one end side. It is divided into a plurality of filtration chambers with a second filtration chamber 3B between the partition wall 8A and the partition wall 8B on the other end side, and a partition wall 8B on the other end side of this second filtration chamber 3B and a partition wall 8B on the other end side. A portion between the outer wall 2B and the outer wall 2B is a cake discharge chamber 3C. It should be noted that a filtrate outlet 9A for collectively discharging the filtrate filtered in both the filtration chambers 3A and 3B is provided at the bottom of the first and second filtration chambers 3A and 3B, and the bottom of the cake discharge chamber 3C is provided. Is provided with a cake outlet 9B.

Further, these first and second filtration chambers 3A,
In 3B, a filter body 10 having a substantially cylindrical shape is provided with the above-mentioned axis O.
The screw 4 is arranged in this direction.
Is inserted into the inner periphery of the filter, and the processed product is dehydrated and filtered by the filter 10 while being conveyed from one end to the other end by the screw 4. Here, in this embodiment, the first filtration chamber 3A has a substantially cylindrical shape having an inner diameter slightly larger than the outer diameter of the screw blades 4B of the screw 4 and extending in the direction of the axis O. The filter body 10A
While the central axis is arranged so as to coincide with the axis O,
In the second filtration chamber 3B, the length in the direction of the individual axis O is the first
Second annular filter body 1 shorter than the filter body 10A of FIG.
A plurality of 0Bs are arranged so that their central axes are oriented in the axis O direction and are arranged in the axis O direction.

Each of these filter bodies 10A and 10B has a large number of wedge wires 11 between a pair of annular plate-shaped flanges provided at both ends in the central axis direction.
However, the filtration section 12 for filtering the above-mentioned processed material is formed in the body peripheral portion by being attached with the side having a tapered cross section facing the outer peripheral side and being installed with an extremely small filtration interval therebetween. However, in the first filter body 10A, as shown in FIGS. 5 and 6, the wedge wires 11 ... Are arranged so as to extend in the central axis direction of the filter body 10A, that is, in the axis O direction. On the other hand, in the second filter body 10B, a large number of ring-shaped wedge wires 11 are arranged in the central axis direction of the second filter body 10B via a support rod or the like connecting both flanges, that is, The first and second filter bodies 10A and 10B have different filtration intervals formed in the filter section 12.

Of these, the first filter body 10A disposed in the first filter chamber has the partition wall around the hole formed in the outer wall 2A at one end of the filter chamber 3 and through which the screw 4 projects. The outer wall 2A and the partition wall 8A are fixedly arranged so as to extend to 8A.
A supply pipe 13 for supplying a processed material is connected between the screw 4 and the filter body 10 to the cover 2C provided in A. On the other hand, in the second filtration chamber 3B, the axis O
A plurality of flat plate-shaped fixed bodies 14 each having a hole through which the screw 4 is inserted are formed in the center between the second filter bodies 10B, 10B that are adjacent to each other in the direction. Are attached to the mounting shafts 15 ... Of and are fixed perpendicular to the axis O and parallel to each other, so that
Of the filter bodies 10B, 10B are slidably attached to the above-mentioned flanges, and the second filter bodies 10B ... And the fixed bodies 14 ... Are arranged alternately in the axis O direction. The screw 4 has these second filter bodies 10B ...
And the hole of the fixed body 14 is inserted in the inner circumference.

Further, in the present embodiment, in the second filtration chamber 3B, a plurality of second filtration bodies 10B ... And fixed bodies 14 ... Of the camshafts 16 ... Are crossed at equal intervals in the circumferential direction and parallel to the axis O, and a chain wheel 16A attached to the other end side is provided above the drive device 6 for driving the camshaft 16. It is rotatably supported by being connected to another drive device 17 by a chain 18, and a cam 16B which can slidably contact the outer circumference of the flange of each of the second filter bodies 10B. ... are attached, and these cam shafts 16 ... Are rotated while the phases of the cams 16B ... Are matched with one second filter body 10B. The second filter bodies 10B are rotatably supported over the entire circumference in the circumferential direction of the screw 4 independently of each other about the central axes thereof, and the central axes of the second filter bodies 10B. It is eccentrically rotated with respect to the axis O while being kept parallel to O. Moreover, the phases of the cams 16B ... Provided on the camshaft 16 are sequentially shifted toward the axis O with a predetermined phase difference, whereby the eccentric state of the central axis is adjacent to the axis O. The second filter bodies 10B ... That are different from each other are made different from each other.

The inner diameter of the second filter body 10B is
In this embodiment, the inner diameter of the first filter body 10A is made larger than that of the first filter body 10A, and the second filter body 10B is eccentric to the inner periphery of the screw blade 4B. Fixed body 1 within the range where it does not interfere
No. 4 protrudes toward the inner peripheral side of the hole, while the inner peripheral portion is separated from the outer periphery of the screw blade 4B so as to recede toward the outer peripheral side of the hole. Further, in the above-mentioned filter portion 12 of the second filter body 10B, the size of the filter gap between the wedge wires 11 ...
It is made smaller than the filtration gap of the filtration part 12 of the filtration body 10A.

Further, in this embodiment, the first,
1st, 2nd in which the 2nd filter body 10A, 10B ... was arrange | positioned
In each of the filtration chambers 3A and 3B, the filtration bodies 10A, 10B ...
Cleaning pipes 19 and 20 for cleaning the filter bodies 10A, 10B ... by injecting a cleaning liquid (cleaning water) L toward the pipes are provided as cleaning means so as to extend in the direction of the rotation axis O of the screw 4. Cage, of which the first filtration chamber 3
The cleaning pipe 19 disposed at A is rotatable in the circumferential direction of the filter body 10 (first filter body 10A), and is movable relative to the first filter body 10A. Has been done. Therefore, the relative movement direction of the filter body 10 (first filter body 10A) and the cleaning means (cleaning tube 19) in the present embodiment is the circumferential direction around the axis O.

In this embodiment, the cleaning pipe 19 is a straight pipe having a circular tubular shape made of a metal material having sufficient rigidity such as stainless steel, and is parallel to the axis O. Further, it is rotatably arranged while maintaining this parallel state, and a large number of nozzles 19 are provided on the outer periphery thereof.
A ... are arranged in series at equal intervals in the direction of the axis O, and regardless of the rotational position of the cleaning pipe 19, the nozzle holes are always opened toward the axis O in a cross section orthogonal to the axis O. It is provided in. Further, in the present embodiment, a plurality of such cleaning tubes 19 (three in the present embodiment) are provided on the outer periphery of the first filter body 10A, at equal intervals in the circumferential direction, that is, 120 ° each about the axis O. The cleaning pipes 19 are arranged so as to be displaced in the circumferential direction, and the cleaning pipes 19 ... Have a central angle of 120 ° centered on the axis O, that is, a range in which the outer periphery of the first filter body 10A is equally divided in the circumferential direction. Reciprocating rotation is possible integrally with each other within an arcuate range.

Here, in order to integrally rotate the cleaning pipes 19 in the circumferential direction of the first filter body 10A in this manner, in the present embodiment, the outer periphery of the first filter body 10A is arranged. , A pair of annular mounting members 21 and 21 centered on the rotation axis O of the screw 4 are provided near both ends of the first filter body 10A, and these mounting members 21 and 21 are provided.
A tooth surface 21A of a gear is formed on the outer circumference of the outer circumference of the outer wall 2A on both sides of the lower part of the first filter chamber 3A near both ends of the first filter body 10A. A support means 22 in which a driven gear 22B that meshes with the tooth surface 21A is rotatably attached to the tip of a support shaft 22A that protrudes from the partition wall 8A into the first filtration chamber 3A in parallel with the axis O. And a drive shaft 23B which is connected to a drive device 23A such as a motor and can be rotatably driven in the upper part of the first filtration chamber 3A.
And a drive gear 2 that extends over the drive shaft 23B and meshes with the tooth surface 21A of the mounting members 21 and 21.
3C is attached and drive means 23 is provided.
The cleaning pipes 19 ... Are connected to the nozzles 21A.
Are attached to the inner peripheries of the attachment members 21 and 21 with respect to the axis O at equal intervals in the circumferential direction, and the support means 22 ...
As the mounting members 21 and 21 rotatably supported by the driving means 23 are reciprocally rotated in the range of 120 °, the mounting members 21 and 21 are also reciprocally rotatable in the range of 120 ° about the axis O.

Further, in this embodiment, an annular water guiding pipe 24 centering on the axis O is also disposed in the middle of the pair of mounting members 21 and 21 in the direction of the axis O, and each washing pipe 19 is provided. .. are connected to the water guide pipe 24 at their central portions so that the interiors of the water pipes communicate with each other. Therefore, the water pipe 24 also serves as the cleaning pipe 19 ...
It is reciprocally rotatable around the axis O in a range of 120 ° integrally with the Nos. 1 and 21. And, in this water conduit 24, FIG.
Further, as shown in FIG. 4, both ends thereof are rotatable about axes P, Q, R parallel to the axis O and are fluid-tightly connected to each other, which are so-called swivel joint structures (in this embodiment, a plurality of swivel joints are used). One end of the connecting pipe 25 (one end of the elbow pipe 25A) composed of the elbow pipes 25A and 25B, and the other end (elbow pipe 25
The other end B) is a supply pipe 2 connected to a cleaning liquid supply source (not shown) for supplying the cleaning liquid toward the cleaning pipes 19 ...
Connected to 6. The water guide pipe 24, the connection pipe 25, and the supply pipe 26 are also made of a metal material having sufficient rigidity such as stainless steel in the present embodiment, like the cleaning pipes 19 ...

That is, in the connecting pipe 25, the bent one end of the elbow pipe 25A having a substantially "U" shape is provided at the tip of the connecting pipe 24A projecting from the water guiding pipe 24 in parallel with the axis O. The elbow pipe P is coaxially connected to each other about the axis P so as to be rotatable and liquid-tight, and the other end of the elbow pipe 25A is L-shaped with both ends bent in opposite directions. The bent one end of 25B is connected to the axis Q coaxially with each other so as to be rotatable around the axis Q and is liquid-tightly connected, and the other bent end of the elbow pipe 25B is connected to the supply pipe 26.
The tip end portion 26A oriented parallel to the axis O is coaxially connected with the axis R and rotatable around the axis R and is fluid-tightly connected. Therefore, the connection pipe 2 connected in this way and interposed between the water conduit 24 and the supply pipe 26.
As shown in FIG. 4, reference numeral 5 indicates a reciprocating rotation of the connecting pipe 24A while the elbow pipes 25A and 25B are bent at least within the reciprocating rotation range S of the connecting pipe 24A accompanying the reciprocating rotation of the water guiding pipe 24. It is possible to follow.

Further, in this embodiment, the cleaning pipe 19 is used.
6, the cleaning liquid L sprayed from the nozzle 19A is flat and flat in the circumferential direction of the first filter body 10A, that is, the filter body 10 (first filter body 10A) and the cleaning means ( It is configured to be jetted onto the first filter body 10A in a flat shape that is flat in the relative movement direction with respect to the cleaning pipe 19), and in particular, the cleaning pipe 19 ... Is made parallel to the rotation axis O of the screw 4. Accordingly, the flat surface T formed by the flattened cleaning liquid L also extends in the plane direction including the substantially axis O, or in the plane direction inclined at an extremely small angle of about 5 to 10 ° with respect to this. It is designed to extend. In addition, in order to eject the cleaning liquid L in a flat shape that is flat in the circumferential direction in this way, the injection hole of the nozzle 19A is also the first.
The flat surface T is formed on the inner peripheral surface of a general injection hole having a flattened shape in the circumferential direction of the filter body 10A, or a concave conical shape.
A groove may be formed along the line. Then, the cleaning liquid L jetted from such a nozzle 19A has an axis O
Adjacent nozzles 1 spread in a triangular shape in the direction
9A ... The first filter body 10 has its ends overlapped with each other.
It is injected onto the outer peripheral surface of A so as to be continuous in the direction of the axis O. On the other hand, in contrast to the rotatable cleaning pipes 19 ... Which are disposed in the first filtration chamber 3A, the cleaning pipes 20 disposed in the second filtration chamber 3B have the outer peripheral surface thereof. A pair of cleaning pipes 20, 20 provided with a large number of nozzles are provided on both sides of the upper portion of the second filter body 10B in parallel with the partition line 8A, parallel to the axis O.
It is configured to be bridged between 8B, the cleaning pipe 19 ...
It is fixed to these partition walls 8A and 8B without rotating like this.

In the cake discharge chamber 3C next to the first and second filtration chambers 3A and 3B in which the cleaning pipes 19 and 20 are thus provided, the screw shaft 4A of the screw 4 is installed in the cake discharge chamber 3C. The sleeve 27 has an annular shape and is fitted to the extended portion so as to be movable back and forth in the direction of the axis O. The sleeve 27 has an outer diameter larger than the inner diameter of the hole formed in the partition wall 8B for discharging the filtered cake while the screw 4 is inserted, and the tip end surface of the annular shape is the outer circumference. Screw shaft 4 toward the side
The taper surface is formed so as to be inclined toward the other end side of A. Further, on the other end side of the sleeve 27,
A piston rod of an air cylinder 28 attached to the outer wall 2B is connected, and the piston rod appears and disappears toward the one end side in parallel with the axis O and the sleeve 2
By advancing and retracting 7, the gap between the sleeve 27 and the hole of the partition wall 8B can be appropriately set to adjust the amount of cake discharged from the hole.

Thus, in the screw press type filtering device thus constructed, the cleaning liquid L jetted from the nozzle 19A of the cleaning pipe 19 as the cleaning means is shown in FIG.
Since it is not a cone (cone) shape ejected from the general nozzle K shown in FIG. 2 but a flat surface shape that is flat in the circumferential direction of the first filter body 10A as described above, Even if the supply amount and the supply pressure of the cleaning liquid L are the same, the injection area of the outer periphery of the first filter body 10A to the filter portion 12 is small by the amount of being flattened in the circumferential direction.
The supply amount and supply pressure per unit area for Therefore, a sufficiently large amount and high pressure of the cleaning liquid L can be sprayed onto the filtering unit 12 even at both ends of the cleaning liquid L which is spread in a triangular shape along the plane T in the direction of the axis O. L is a nozzle 1 provided in the cleaning pipe 19.
While stacking its ends from 9A ... and continuing in the direction of the axis O,
By rotating the cleaning tube 19 in the circumferential direction of the first filter body 10A and moving relative to the first filter body 10A, the first filter body 1A is rotated.
The filter part 12 on the outer periphery of 0A is evenly and surely cleaned in the direction of the axis O and in the circumferential direction.
It is possible to remove the adhered matter that has adhered to the filter unit 12.

On the other hand, in this embodiment, the first filtration chamber 3A
The cleaning pipe 19 serving as the above-mentioned cleaning means is provided so as to extend in the direction of the rotation axis O of the screw 4 as described above, and the outer periphery of the first filter body 10A is rotatable in the circumferential direction. Therefore, compared to the conventional one that fixes the washing pipe and rotates the filter body, the filter body requires much higher strength and rigidity, and the filter body can be engaged and disengaged in forward and reverse rotation of the screw. The filter body 10 (first
The filter body 10A) can be washed. Further, for a conventional cleaning pipe that moves in the rotation axis direction of the screw, the cleaning pipe 19 may be moved in the entire circumferential direction that is shorter than the entire length of the first filter body 10A. The cleaning time required to clean the entire outer peripheral surface of the filter body 10A can be shortened, and therefore, efficient cleaning can be achieved with the simple structure as described above.

Further, in this embodiment, a plurality of (three) cleaning pipes 19 ... Are arranged at equal intervals in the circumferential direction on the outer periphery of the first filter body 10A, and these cleaning pipes 19 ... Since the first filter body 10A can be integrally reciprocally rotated within a range in which the outer circumference of the first filter body 10A is equally divided (three divisions), even if the entire circumference of the first filter body 10A is washed, individual washing is possible. The pipe 19 is required to rotate only within this equally divided range, so that the cleaning time can be further shortened, and more efficient cleaning can be promoted. Further, in particular, in order to integrally rotate the plurality of cleaning pipes 19 ...
In the present embodiment, on the outer periphery of the first filter body 10A,
An annular mounting member 2 centered on the axis O of the screw 4
1, 21 and supporting means 22 for rotatably supporting these mounting members 21, 21 about the axis O, and the mounting member 2.
Drive means 23 for rotating the Nos. 1 and 21 about the axis O is provided, and the cleaning pipes 19 ... Are attached to the attachment members 21, 21 rotated by this drive means.
It is possible to surely rotate the cleaning pipes 19 around the axis O while maintaining the state in which the cleaning pipes 19 are evenly spaced in the circumferential direction.

Further, in this way, the cleaning pipes 19 ... Are rotatable and relatively movable with respect to the filter body 10 (first filter body 10A), so that in the present embodiment, these cleaning pipes are cleaned. The pipes 19 are connected to an annular water guiding pipe 24, and between the connecting pipe 24A of the water guiding pipe 24 and the tip portion 26A of the cleaning liquid L supply pipe 26, the rotation axis O of the screw 4 is connected. A plurality of elbow pipes 25 which are rotatable around parallel axes P, Q, R and are fluid-tightly connected to each other.
A connecting pipe 25 composed of A and 25B is interposed, and while the elbow pipes 25A and 25B rotate about axes P, Q, and R, the connecting pipe 25 bends and follows the rotation of the water guiding pipe 24. Then, the cleaning liquid L from the above-mentioned source is surely supplied to the cleaning pipe 19 ...
Can be supplied to. Therefore, according to the present embodiment, it becomes possible to stably inject the cleaning liquid L with a high supply pressure and a large supply amount as described above from the nozzles 19A provided in the cleaning pipe 19. The outer periphery of 10 (first filter body 10A) can be washed more reliably.

Moreover, in this embodiment, the cleaning pipe 19 is used.
... and a connection pipe 25 interposed between the cleaning liquid L supply source
Is constituted by the elbow pipes 25A and 25B as described above. However, in this respect, for example, when the filtering device is relatively small and the supply pressure of the cleaning liquid L from the supply source is not so high, such a connecting pipe 2 is used.
It is possible to use a flexible tube such as a rubber tube in place of No. 5, but when the supply pressure becomes high, such a rubber tube or the like may be ruptured, whereas such an elbow tube 25A, 25B. According to the filtering device of the present embodiment in which the connecting pipe 25 made up of the cleaning pipe 19 and the supply source is interposed, the elbow pipes 25A and 25B can be made of a highly rigid metal material or the like. Therefore, it is possible to stably and reliably supply the cleaning liquid L regardless of whether the supply pressure is low or high.

Further, in the filter body 10 of the present embodiment, not only in the first filter body 10A but also in the second filter body 10 described above, the filter portion 12 formed in the body peripheral portion has a large number of wedge wires. 11 ... are attached with their cross-section tapering sides facing toward the outer peripheral side with a very small filtration interval between them, so that the solid content in the processed material conveyed in the filter body 10 is the filtration interval. Leaking from the filter body 1
0 Even if it adheres to the outer circumference, the distance between adjacent wedge wires 11 ...
The advantage that such deposits can be easily removed is obtained. Then, in the first filter body 10A, the filter portion 12
Are arranged so that the plurality of wedge wires 11 extend in the direction of the axis O and are arranged side by side in the circumferential direction at the above-mentioned filtration intervals, while the plurality of wedge wires 11 ... Since the cleaning liquid L to be cleaned will clean the filtering portion 12 while moving in the circumferential direction, the cleaning liquid L is sprayed straight toward the wedge wires 11 widely opened to the outer peripheral side as shown in FIG. As described above, it is possible to directly blow off the deposit that is easily removed as described above, and it is possible to achieve more efficient and reliable cleaning.

In this embodiment, the first filtration chamber 3A
Although the cleaning pipe 20 is left fixed in the second filtration chamber 3B next to the above, the cleaning pipe 20 may be similarly rotated in this second filtration chamber 3B. However, each of the second filter bodies 10B ... In the second filter chamber 3B is rotatably supported over the entire circumference in the circumferential direction as described above, and the second filter body 10B. Since it is rotated by contact with the conveyed processing object, the cleaning liquid L sprayed from the cleaning pipes 20, 20 fixed as in this embodiment can perform sufficiently efficient cleaning. Even when the cleaning pipe 20 is rotatable as described above, or even when the cleaning pipe 20 is fixed and the second filter 10B is rotated to clean the entire circumference thereof, the filter 10 ( The second filter body 10B ...) and the cleaning means (cleaning pipe 20) move in relative directions such that the first filter body 10A in the first filter chamber 3A and the cleaning pipe 1
Since it is in the circumferential direction of the second filter bodies 10B ... As in the case of No. 9, if the cleaning liquid jetted from the cleaning pipe 20 is made flat in the circumferential direction, the cleaning in the first filtration chamber 3A The same effect can be obtained.

Further, in the present embodiment, the cleaning pipes 19 and 20 are arranged on the outer periphery of the filter body 10 so as to extend in the direction of the axis O of the screw 4 as described above.
The case where the 20 and the filter body 10 are movable relative to each other in the circumferential direction about the axis O, that is, can be relatively rotated, has been described. For example, the filtration including the former cleaning means of the present invention described above. As applied to the apparatus, as in the second embodiment shown in FIG. 7, an annular cleaning pipe 31 having a size larger than this is arranged around the outer periphery of the filter body 10 around the axis O, and the cleaning pipe 31 is Can be moved in the direction of the axis O,
The cleaning liquid L is supplied from the nozzle provided on the inner circumference of the cleaning pipe 31,
Alternatively, the injection may be performed as a flat planar shape in the relative movement direction of the filter body 10 and the cleaning pipe 31, that is, the rotation axis O direction of the screw 4. Further, as in the third embodiment shown in FIG. 8, the present invention is applied to the filtration device having the latter conventional cleaning means described above, and the filter body 10 is rotationally driven by engaging reverse rotation of the screw. In addition to the above, the cleaning pipe 32 may be fixedly provided so as to extend in the direction of the axis O, and the planar cleaning liquid L may be jetted from a nozzle provided on the outer periphery of the cleaning pipe 32. Since the relative movement direction between the cleaning pipe 32 and the cleaning pipe 32 is the same as that in the embodiment shown in FIGS. 1 to 6, the cleaning liquid L may be flat in the circumferential direction of the filter body 10.

[0030]

As described above, according to the present invention,
By making the cleaning liquid sprayed from the cleaning means flat in the direction of relative movement with the filter body, that is, when the filter body and the cleaning means relatively move in the circumferential direction of the filter body, they are flattened in this circumferential direction. By making it flat, it is possible to spray a cleaning liquid with a sufficient supply pressure and supply amount on the outer periphery of the filter even at its end, which makes it possible to clean the entire filter evenly. Thus, the attached matter can be surely removed. Further, particularly when the cleaning means itself moves, a connecting pipe capable of following the relative movement of the cleaning means is interposed between the cleaning means and the supply source of the cleaning liquid, so that the moving position of the cleaning means can be improved. Regardless, the cleaning liquid can be reliably supplied to the cleaning means.

[Brief description of drawings]

FIG. 1 is a side sectional view showing an embodiment of the present invention.

FIG. 2 is a plan view of the embodiment shown in FIG.

FIG. 3 is a sectional view taken along line XX in FIGS. 1 and 2.

FIG. 4 is a sectional view taken along the line YY in FIGS. 1 and 2.

FIG. 5 is a perspective view showing the inside of the first filtration chamber 3A of the embodiment shown in FIG. 1 (however, the screw 4 is not shown).

FIG. 6 is a ZZ sectional view in FIG.

FIG. 7 is a perspective view showing a second embodiment of the present invention.

FIG. 8 is a perspective view showing a third embodiment of the present invention.

FIG. 9 is a diagram showing a case where the cleaning liquid L is sprayed in a cone shape.

[Explanation of symbols]

3 filtration chambers 3A First filtration room 3B Second filtration chamber 4 screws 10 Filter 10A First filter body 10B Second filter body 11 wedge wire 12 Filter 19, 20, 31, 32 Cleaning tube 21 Mounting member 22 Supporting means 23 Drive means 24 water conduit 25 Connection pipe 25A, 25B elbow tube 26 Supply pipe O screw 4 rotation axis P, Q, R Axis parallel to O L cleaning liquid T A flat surface along which the cleaning liquid L is flat

Front Page Continuation (72) Inventor Ken Abe 2-17-15 Tsukushima, Chuo-ku, Tokyo Within Tsukishima Kikai Co., Ltd. (56) Reference JP 2000-334600 (JP, A) JP 11-207110 ( JP, A) JP-A-6-292997 (JP, A) Actual development Sho 63-11198 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) B01D 29/25 B01D 29/62 B30B 9/14

Claims (2)

(57) [Claims] 1. A screw is rotatably inserted into an inner circumference of a cylindrical filter body, and a processed material supplied from one end side of the screw to the filter body is fed to the other end by rotation of the screw. while transporting the side, a screw press type filtration apparatus for filtering by the filter body, the filter body
A number of wedge wires are attached to the circumference of the waist.
Extending in the direction of the rotation axis of the crow,
They are arranged side by side with a filtration interval in the circumferential direction.
On the other hand, on the outer periphery of the filter body, a cleaning means for cleaning the filter body by injecting a cleaning liquid toward the filter body is provided, and the cleaning means and the filter body are relatively disposed. The screw press is configured to be movable in the circumferential direction of the filter body, and the cleaning liquid is jetted toward the filter body in a flat planar shape in the circumferential direction of the filter body. Type filtration device. 2. A connecting pipe capable of following the relative movement of the cleaning means with respect to the filter body is interposed between the cleaning means and a supply source for supplying the cleaning liquid to the cleaning means. The screw press type filter device according to claim 1.