JP2017144391A - Solid-liquid separation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a solid-liquid separation device which can efficiently discharge a discharged material from a solid discharge port.SOLUTION: A solid-liquid separation device 100 is provided with: a plurality of rotating bodies 3 which are arranged in two upper and lower rows and each includes a rotation shaft 31 and a laminated rotational filtering body 30 which has a plurality of filtering pieces 32-34 laminated along a shaft direction of the rotation shaft 31 and has a filter groove between the filtering pieces 32-34; a treatment tank 1 including a solid discharge port 2c which discharges a discharged material containing a solid component of a raw liquid delivered by the rotating bodies 3 and a pair of side plates 1a arranged opposite to each other on both end sides in the shaft direction of the rotating bodies 3; and low-friction surface parts 9 which are respectively arranged on inder side surfaces 101a, opposite to each other, of the pair of side plates 1a, and have a friction coefficient to the discharged material delivered by the rotating bodies 3 lower than that of the side plates.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a solid-liquid separator, and more particularly, to a solid-liquid separator provided with a laminated rotary filter.

  2. Description of the Related Art Conventionally, a solid-liquid separation device including a laminated rotary filter is known (see, for example, Patent Document 1).

  In Patent Document 1, a rotating body including a rotating shaft and a laminated rotating filter body having a plurality of filter pieces, a treatment tank including a pair of side plates disposed at both ends of the rotating body, and a solid discharge port And a solid-liquid separation device including a pressurizing plate that pressurizes the discharge discharged from the solid discharge port. The pressure plate is formed in a flat plate shape extending in the axial direction of the rotation shaft. In addition, the axial direction of the rotating shaft is orthogonal to the feeding direction of the discharged matter.

Japanese Patent Laid-Open No. 10-137795

  However, in the conventional solid-liquid separation device such as the above-mentioned Patent Document 1, when the solid-liquid separation processing is performed on the object having poor slip property and discharged, the shaft contacts with the pair of side plates of the processing tank, Due to the frictional force (brake) applied to the discharge material on the outer side in the direction, compared with the central portion sandwiched between the vicinity portions of the pair of side plates, the solid discharge ports in the vicinity of the pair of side plates It is thought that there is an inconvenience that the amount of discharged waste is reduced. For this reason, since discharge | emission material is not discharged | emitted equally in the axial direction of a solid discharge port, there exists a problem that discharge | emission material is not discharged | emitted efficiently from a solid discharge port.

  The present invention has been made to solve the above-described problems, and one object of the present invention is to provide a solid-liquid separation device that can efficiently discharge discharged matter from a solid discharge port. That is.

  A solid-liquid separation device according to one aspect of the present invention includes a rotary shaft and a multi-layer rotary filter having a plurality of filter pieces stacked along the axial direction of the rotary shaft, and a filtration groove formed between the filter pieces. A rotating body arranged in two upper and lower rows, a solid discharge port for discharging discharge containing solid components of the stock solution sent by the rotating body, and both ends of the rotating body in the axial direction. A treatment tank including a pair of side plates disposed so as to face each other, and a low friction surface portion provided on inner surfaces facing each other of the pair of side plates, and having a lower friction coefficient with respect to the discharge material sent by the rotating body than the side plates; Is provided.

  In the solid-liquid separation device according to one aspect of the present invention, as described above, the friction coefficient with respect to the discharged matter that is disposed on the mutually opposing inner surfaces of the pair of side plates of the processing tank and is sent by the rotating body is lower than that of the side plates. Provide a low friction surface. Thereby, since the low friction surface part is provided between the discharged material and the pair of side plates, the frictional force (brake) applied to the discharged material from the side surface side as compared with the case where the discharged material and the pair of side plates are in contact with each other. Therefore, it is possible to suppress an increase in the difference in resistance applied between the inside and outside (side plate side) of the discharged matter. As a result, the discharge can be discharged evenly in the axial direction of the solid discharge port, so that the discharge can be efficiently discharged from the solid discharge port.

  In the solid-liquid separation device according to the above aspect, preferably, the low friction surface portion overlaps a region between a plurality of rotating bodies arranged in two upper and lower rows when viewed from the axial direction on the inner surfaces of the pair of side plates. At the same time, it is provided at a position in contact with the discharged material sent by the rotating body. If comprised in this way, since the low friction surface part is provided in the part which the discharge | emission material of the inner surface of a side plate contacts, the frictional force added to discharge | emission material can be reduced effectively.

  In the solid-liquid separation device according to the above aspect, the low friction surface portion is preferably provided at a position in contact with the axial end portion of the discharged material between the most downstream rotating body and the solid discharge port. If comprised in this way, the discharge | exhaust will be extruded when the motive power from a rotary body adds with respect to discharge | emission from back, and it is a position where the influence of the frictional force from a side plate becomes large, and the most downstream rotator and solid. Since the low friction surface portion is provided at a position in contact with the axial end portion of the discharged material between the discharge port, the frictional force applied to the discharged material can be effectively reduced.

  In the solid-liquid separator according to the above aspect, the low friction surface portion is preferably formed as a coating layer covering the inner surface of the side plate. If comprised in this way, a low friction surface part can be easily formed only by coating with respect to a side plate.

  In the solid-liquid separator according to the above aspect, preferably, the low friction surface portion is constituted by a plate material disposed on the inner surface of the side plate. If comprised in this way, since the low friction surface part is comprised by the member different from a side plate, when a low friction surface part deteriorates, the function of a low friction surface part can be recovered by replacing | exchanging board | plate materials. it can. Thereby, the low friction surface part excellent in maintainability can be provided.

  In the solid-liquid separation device according to the above aspect, the side plate is preferably made of stainless steel, and the low friction surface portion is made of a material having a lower friction coefficient than stainless steel. If comprised in this way, the frictional force added to discharge | emission can be effectively reduced by the low friction surface part whose friction coefficient is lower than stainless steel.

  In this case, preferably, the low friction surface portion is formed of a resin material containing fluorine. If comprised in this way, since the water contained in discharge | emission can be repelled with the resin material containing a fluorine, the frictional force added to discharge | emission can be reduced more effectively.

  ADVANTAGE OF THE INVENTION According to this invention, the solid-liquid separation apparatus which can discharge | emit discharge efficiently from a solid discharge port as mentioned above can be provided.

It is sectional drawing of the side surface of the solid-liquid separator by 1st Embodiment of this invention. It is a side view of the solid-liquid separation device by a 1st embodiment of the present invention. FIG. 4 is a cross-sectional view taken along line 400-400 in FIG. 2. It is the enlarged plan view which showed the adjacent state of the laminated | stacked rotary filter body of the solid-liquid separator by 1st Embodiment of this invention. It is an enlarged side view of the laminated rotary filter body of the solid-liquid separator according to the first embodiment of the present invention. It is an enlarged front view of the principal part of the laminated | stacked rotary filter body of the solid-liquid separator by 1st Embodiment of this invention. FIG. 4 is a partial enlarged view of a P1 portion shown in FIG. 3. It is a typical side view for demonstrating the position in which the low friction surface part of 1st Embodiment of this invention is provided. It is a typical side view for demonstrating the position in which the low friction surface part of 2nd Embodiment of this invention is provided. It is sectional drawing from the front side of the solid-liquid separator by 3rd Embodiment of this invention. It is the elements on larger scale of the P2 part shown in FIG.

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

[First Embodiment]
As shown in FIG. 1, the solid-liquid separator 100 includes a processing tank 1, a stock solution supply port 2a, a liquid discharge port 2b, a solid discharge port 2c, a plurality of rotating bodies 3, and a plurality of motors 4 (see FIG. 1). 2), a seal member 5, a sludge scraping plate 6, a discharge chute 7, a pressurizing portion 8, and a low friction surface portion 9. Further, the solid-liquid separation device 100 is configured such that the stock solution is supplied from the stock solution supply port 2 a provided in the upper part of the processing tank 1. The solid-liquid separator 100 is configured to separate the supplied stock solution into a solid component and a liquid component (moisture). Further, the solid-liquid separation device 100 is configured to discharge the separated liquid component from a liquid discharge port 2 b provided in the lower part of the processing tank 1. Further, the solid-liquid separation device 100 is configured to discharge the discharged material containing the solid components of the stock solution sent by the rotating body 3 from the solid discharge port 2 c provided at the upper side of the processing tank 1.

  The processing tank 1 has a rectangular parallelepiped shape. Moreover, the processing tank 1 is arrange | positioned at the stock solution supply port 2a side (X1 direction side) of a pair of side plate 1a arrange | positioned at the both ends (Y1 direction side and Y2 direction side) of the rotary body 3, and a pair of side plate 1a. And a front plate 1c disposed on the solid discharge port 2c side (X2 direction side) of the pair of side plates 1a. The pair of side plates 1a is made of stainless steel. In FIG. 1, the inner surfaces 101a of the pair of side plates 1a cannot be directly seen by the low friction surface portion 9, and therefore, the inner surfaces 101a (the pair of side plates 1a) are illustrated by broken line leader lines.

  Here, in the following description, the direction from the rear plate 1b to the front plate 1c is defined as the front direction (X2 direction), and the opposite direction is defined as the rear direction (X1 direction). A direction perpendicular to the front-rear direction (X direction) and the up-down direction (Z direction) is defined as a width direction (Y direction).

  As shown in FIG. 1, the rotating body 3 includes a laminated rotating filter body 30 and a rotating shaft 31.

  The plurality of laminated rotary filter bodies 30 are arranged in two rows in the upper and lower directions toward the solid discharge port 2c so as to send the solid components of the supplied stock solution to the solid discharge port 2c. Specifically, the laminated rotary filter bodies 30 are provided so that a total of 10 pieces in the lower row, 6 in the lower row and 4 in the upper row are arranged vertically. The vertical (Z direction) spacing between the upper layered rotary filter bodies 30 and the lower layered rotary filter bodies 30 is from the stock solution supply port 2a side (X1 direction side) to the solid discharge port 2c side (X2). It is configured to become narrower toward the direction side. Further, the upper and lower rows of laminated rotary filter bodies 30 are arranged so as to incline obliquely upward from the stock solution supply port 2a side (X1 direction side) toward the solid discharge port 2c side (X2 direction side). ing.

  Further, the six laminated rotary filter bodies 30 in the lower row are arranged at a predetermined interval, and are configured to convey solid components by rotating in the same direction (clockwise in FIG. 1). Has been. Further, the four stacked rotary filter bodies 30 in the upper row are arranged at a predetermined interval so as to convey solid components by rotating in the same direction (counterclockwise in FIG. 1). It is configured.

  As shown in FIG. 3, the stacked rotary filter body 30 includes a plurality of filter pieces stacked along the rotation shaft 31. Specifically, as shown in FIGS. 4 to 6, the laminated rotary filter body 30 includes a plurality of medium-diameter disk filter pieces 32, a plurality of small-diameter disk filter pieces 33, and a plurality of large-diameter disk filter pieces. 34. The rotating shaft 31 is disposed so as to extend in the width direction (Y direction). Further, a small diameter disc filter piece 33, a medium diameter disc filter piece 32, a large diameter disc filter piece 34 and a medium diameter disc filter piece 32 are laminated on the rotary shaft 31 in this order. That is, between the adjacent medium-diameter disc filter pieces 32, the large-diameter disc filter pieces 34 and the small-diameter disc filter pieces 33 are alternately arranged, and the filter pieces are laminated. And the said order is repeated and several filter pieces are laminated | stacked. The medium-diameter disc filter piece 32, the small-diameter disc filter piece 33, and the large-diameter disc filter piece 34 are examples of the “filter piece” in the claims.

  Further, a filtration groove S is formed between adjacent medium-diameter disc filter pieces 32. Specifically, the medium-diameter disc filter piece 32 is provided with a convex portion 32a that abuts on another medium-diameter disc filter piece 32 adjacent in the axial direction (Y direction). And the filtration groove | channel S is formed between the medium diameter disc filter pieces 32 separated by the convex part 32a. Further, as shown in FIG. 5, four convex portions 32a are arranged at equal intervals (90 degree intervals) along the circumferential direction. Moreover, the convex part 32a is comprised so that it may be inserted in the notch part 33a of the small diameter disc filter piece 33, or the hole 34a of the large diameter disc filter piece 34, as shown in FIG. 5 and FIG. A rotating shaft 31 is inserted into the shaft hole 32 a of the medium diameter disc filter piece 32, the shaft hole 33 b of the small diameter disc filter piece 33, and the shaft hole 34 b of the large diameter disc filter piece 34. One end side (Y1 direction side) and the other end side (Y2 direction side) of the rotating shaft 31 are rotatably supported by a bearing 35 (see FIG. 3).

  The small-diameter disc filter piece 33 is disposed so as to be swingable in the filtration groove S between the adjacent medium-diameter disc filter pieces 32. Further, a filtrate outflow groove G is formed in a portion of the filtration groove S between the adjacent medium diameter disk filter pieces 32 excluding the small diameter disk filter piece 33. The large-diameter disk filter piece 34 is disposed so as to be swingable in the filtration groove S between the adjacent medium-diameter disk filter pieces 32. If comprised in this way, it can suppress that a filtration groove is clogged by rocking | fluctuation of a large diameter disc filter piece and a small diameter disc filter piece. Further, a filtrate outflow groove G is formed in a portion of the filtration groove S between the adjacent medium diameter disk filter pieces 32 excluding the large diameter disk filter piece 34. The liquid components in the stock solution are filtered through these drainage grooves G.

  Further, as shown in FIG. 4, the large-diameter disc filter piece 34 is arranged so as to enter the filtration groove S of the laminated rotary filter body 30 adjacent in the direction (X direction and Z direction) in which the solid component is sent. ing. That is, in the adjacent laminated rotary filter body 30, the position where the large-diameter disk filter piece 34 is arranged in the filtration groove S and the position where the small-diameter disk filter piece 33 are arranged face each other. Has been placed. And the large diameter disc filter piece 34 is comprised so that it may enter in the filtration groove | channel S in which the small diameter disc filter piece 33 of the adjacent laminated rotary filter body 30 is arrange | positioned, and scrapes off a solid component. .

  The medium diameter disc filter piece 32 is made of resin. The small diameter disc filter piece 33 and the large diameter disc filter piece 34 are made of metal.

  As shown in FIGS. 2 and 3, the motor 4 is provided at one end portion in the axial direction (Y direction) of the rotation shaft 31 of each of the plurality of laminated rotary filter bodies 30. Further, the motor 4 is provided for each of a plurality (ten) of the laminated rotating filter bodies 30 (for each rotating body 3). Further, the motor 4 is configured to rotationally drive the rotary shaft 31 via a speed reducer (not shown). As shown in FIGS. 2 and 3, a plurality (ten) of motors 4 may be arranged only on one side in the axial direction (Y1 direction side or Y2 direction side), or on both sides in the axial direction ( You may arrange | position in the Y1 direction side and the Y2 direction side. Further, when a plurality (10) of motors 4 are arranged on both sides in the axial direction (Y1 direction side and Y2 direction side), a plurality of (10) motors 4 are arranged on one side (Y1 direction side) in the axial direction. And it is preferable to arrange alternately on the other side (Y2 direction side).

  As shown in FIG. 1, one seal member 5 is provided between the rear plate 1b (surface on the X1 direction side) of the processing tank 1 and the laminated rotary filter body 30 disposed on the rear plate 1b side of the lower row. Has been placed. The sealing member 5 is configured to seal between the lower row and the laminated rotary filter body 30 on the most rear plate 1b side. Thereby, the seal member 5 is configured to prevent the undiluted solution from flowing out to the liquid discharge port 2b as it is.

  One sludge scraping plate 6 is disposed between the front plate 1c (surface on the X2 direction side) of the processing tank 1 and the laminated rotary filter body 30 disposed on the front plate 1c side of the lower row. One sludge scraping plate 6 is also disposed between the front plate 1c of the treatment tank 1 and the laminated rotary filter 30 disposed on the upper row of the front plate 1c. That is, one sludge scraping plate 6 is disposed on each of the lower row side and the upper row side of the laminated rotary filter 30. The sludge scraping plate 6 on the lower row side is directly fixed to the front plate 1 c of the processing tank 1. Further, the sludge scraping plate 6 on the lower row side is fixed to the front plate 1 c of the processing tank 1 via the mounting plate 60. Further, the sludge scraping plate 6 is configured to scrape and remove the solid matter clogged between the laminated rotary filter bodies 30 arranged on the front plate 1c side.

  As shown in FIG. 1, the discharge chute 7 is provided in the solid discharge port 2 c and constitutes a discharge path for the discharge discharged from the processing tank 1. The discharge chute 7 includes a pair of horizontal plates 70 (only one horizontal plate 70 on the Y1 direction side is shown in FIG. 1) and a bottom plate 71 facing each other in the axial direction (Y direction).

  The horizontal plate 70 is attached to each of the pair of side plates 1a of the processing tank 1, and is disposed to face each other in the axial direction (Y direction). In addition, the space | interval in the axial direction of a pair of horizontal plate 70 is comprised so that it may become slightly larger than the space | interval in the axial direction of a pair of side plate 1a of the processing tank 1. FIG. For example, the distance between the pair of horizontal plates 70 is about 530 mm, and the distance between the pair of side plates 1 a of the processing tank 1 is about 500 mm. Accordingly, the pair of horizontal plates 70 is configured to suppress a large frictional force from acting on the discharged matter discharged from the processing tank 1 into the discharge chute 7. That is, the discharge can be smoothly discharged from the discharge chute 7.

  The bottom plate 71 is inclined obliquely downward and forward. For this reason, the discharge chute 7 is configured to discharge the discharged material obliquely downward (forward in the discharge direction, A1 direction).

  As shown in FIG. 1, the pressing unit 8 includes a pressing plate 81 and a pressing member 82.

  The pressure plate 81 is a single plate member. The pressure plate 81 is made of a metal such as stainless steel. The pressure plate 81 is provided in the solid discharge port 2c. The pressure plate 81 is disposed inside the discharge chute 7 and is rotatably attached to a rotation shaft 81 a provided on the attachment plate 60. The rotation shaft 81 a is provided on the pressure plate 81. The axial direction of the rotating shaft 81 a is substantially parallel to the axial direction (Y direction) of the rotating shaft 31 of the rotating body 3. Further, the pressurizing plate 81 is configured to give resistance by pressurizing the discharged matter on the bottom plate 71 of the discharge chute 7 from the upper side (Z1 direction side). Moreover, the pressurizing plate 81 is configured to apply pressure to the discharged matter uniformly from above in the axial direction (width direction, Y direction).

  The pressing member 82 is disposed so as to be in contact with the surface (upper surface) opposite to the side in contact with the discharged material, and is configured to press the pressure plate 81 toward the discharged material. A plurality of pressing members 82 are arranged at predetermined intervals in the axial direction (Y direction).

  As shown in FIGS. 3 and 7, the low friction surface portion 9 is provided on each of the inner surfaces 101 a facing each other of the pair of side plates 1 a of the treatment tank 1. Moreover, the low friction surface part 9 is provided in the whole region of the inner surface 101a, as shown in FIG. Therefore, the low-friction surface portion 9 overlaps at least a region between the rotating bodies 3 arranged in two upper and lower rows when viewed from the axial direction (Y direction) of the pair of inner surfaces 101a. Is provided at a position (a position surrounded by a broken line indicated by a reference sign Q1) that comes into contact with the discharged product. Further, the low friction surface portion 9 is at least at a position (a position surrounded by a broken line indicated by a reference sign Q2) in contact with an axial end portion of the discharged material between the most downstream rotating body 3 and the solid discharge port 2c. Is provided. In FIG. 8, the range in which the low friction surface portion 9 is provided with respect to the side plate 1a on the Y2 direction side (not shown directly by the low friction surface portion 9 and shown by a broken lead line) is indicated by hatching.

  The low friction surface portion 9 has a lower coefficient of friction than the side plate 1a with respect to the discharged material sent by the rotating body. That is, the low friction surface portion 9 is formed of a material having a lower friction coefficient than stainless steel (the pair of side plates 1a). For example, the low friction surface portion 9 is formed from a resin material containing a fluororesin. As a specific example, the low friction surface portion 9 is formed as a coating layer that covers the inner surface 101a by applying a Teflon (registered trademark) process to the inner surface 101a of the side plate 1a.

(Effect of 1st Embodiment)
In the first embodiment, the following effects can be obtained.

  In the first embodiment, as described above, the low friction coefficient that is disposed on the mutually facing inner surfaces 101a of the pair of side plates 1a of the processing tank 1 and that has a lower friction coefficient than the side plates 1a with respect to the discharged material sent by the rotating body 3. A surface portion 9 is provided. Thereby, since the low friction surface part 9 is provided between discharge | emission material and a pair of side plate 1a, compared with the case where discharge | emission material and a pair of side plate 1a contact, the frictional force applied to discharge | emission material from the side surface side Since (brake) can be made small, it can suppress that the difference of the resistance force added to the inner side and the outer side (side plate 1a side) of discharge becomes large. As a result, since the discharged materials can be discharged evenly in the axial direction of the solid discharge port 2c, the discharged materials can be discharged efficiently from the solid discharge port 2c.

  Further, in the first embodiment, as described above, the low friction surface portion 9 between the rotating bodies 3 arranged in a plurality of two rows in the upper and lower sides when viewed from the axial direction on the inner surface 101a of the pair of side plates 1a. It overlaps with the area and is provided at a position where it comes into contact with the discharge sent by the rotating body 3. Thereby, since the low friction surface part 9 is provided in the part which the discharge | emission thing of the inner surface 101a of the side plate 1a contacts, the frictional force added to discharge | emission can be reduced effectively.

  Moreover, in 1st Embodiment, as mentioned above, the low friction surface part 9 is provided in the position which contacts the edge part of the axial direction of the discharge between the rotary body 3 and the solid discharge port 2c of the most downstream. As a result, when the power from the rotating body 3 is applied to the discharged material from the rear, the discharged material is pushed out, and the rotating body 3 and the solid exhaust at the most downstream position where the influence of the frictional force from the side plate 1a is increased. Since the low friction surface part 9 is provided in the position which contacts the edge part of the discharged material between the outlet 2c in the axial direction, the frictional force applied to the discharged material can be effectively reduced.

  Moreover, in 1st Embodiment, as mentioned above, the low friction surface part 9 is formed as a coating layer which covers the inner surface 101a of the side plate 1a. Thereby, the low friction surface part 9 can be easily formed only by coating with respect to the side plate 1a.

  In the first embodiment, as described above, the side plate 1a is formed of stainless steel, and the low friction surface portion 9 is formed of a material having a lower friction coefficient than stainless steel. Thereby, the frictional force applied to the discharge can be effectively reduced by the low friction surface portion 9 having a friction coefficient lower than that of stainless steel.

  In the first embodiment, as described above, the low friction surface portion 9 is formed from a resin material containing fluorine. Thereby, since the water contained in discharge | emission can be repelled with the resin material containing a fluorine, the frictional force added to discharge | emission can be reduced more effectively.

[Second Embodiment]
Next, a second embodiment of the present invention will be described with reference to FIG. In the second embodiment, unlike the first embodiment in which the low friction surface portion 9 is provided on the entire inner surface 101a of the side plate 1a, an example in which the low friction surface portion 9a is provided on a part of the inner surface 101a of the side plate 1a. explain. In addition, since the solid-liquid separator of 2nd Embodiment is the same as that of 1st Embodiment except the low friction surface part 9a, below, the low friction surface part 9a is demonstrated.

  As shown in FIG. 9, the solid-liquid separation device 200 according to the second embodiment includes a low friction surface portion 9a.

  The low friction surface portions 9 a are respectively provided on the inner surfaces 101 a facing each other of the pair of side plates 1 a of the treatment tank 1. The low friction surface portion 9a is provided in the vicinity of a rotating body that is disposed to face two upper and lower rows of the inner surface 101a. Specifically, the low friction surface portion 9a overlaps with a region between the plurality of upper and lower rotary bodies 3 arranged in two upper and lower rows when viewed from the axial direction (Y direction) of the pair of inner surfaces 101a. Is provided at a position (a position surrounded by a broken line indicated by a reference sign Q1) that comes into contact with the discharged product. Moreover, the low friction surface part 9a is provided in the position (position enclosed with the broken line shown with the code | symbol Q2) which contacts the edge part of the axial direction of the discharge between the rotary body 3 and the solid discharge port 2c on the most downstream side. ing. Moreover, the low friction surface part 9a is provided in the position which overlaps with the rotary body 3 arrange | positioned facing two upper and lower rows seeing from an axial direction (Y direction) among a pair of inner surface 101a. In addition, in FIG. 9, the range in which the low friction surface part 9a is provided with respect to the side plate 1a on the Y2 direction side is indicated by hatching.

(Effect of 2nd Embodiment)
In the second embodiment, the following effects can be obtained.

  In the second embodiment, as in the first embodiment, the friction coefficient for the discharge material disposed on the inner surfaces 101a facing each other of the pair of side plates 1a of the treatment tank 1 and sent by the rotating body 3 is greater than that of the side plates 1a. A low friction surface portion 9a is also provided. Thereby, the discharge can be efficiently discharged from the solid discharge port 2c.

[Third Embodiment]
Next, a third embodiment of the present invention will be described with reference to FIGS. In the third embodiment, unlike the first embodiment in which the low friction surface portion 9 is configured by a coating layer that covers the inner surface 101a of the side plate 1a, an example in which the low friction surface portion 9b is configured by a plate material will be described. In addition, since the solid-liquid separation apparatus of 3rd Embodiment is the same as that of 1st Embodiment except the low friction surface part 9b, below, the low friction surface part 9b is demonstrated.

  As shown in FIG. 10, the solid-liquid separation device 300 according to the third embodiment includes a low friction surface portion 9b.

  As shown in FIGS. 10 and 11, the low friction surface portion 9 b is configured by a plate material (including a sheet shape) disposed on the inner surface 101 a of the side plate 1 a. The low friction surface portion 9b is in contact with the inner surface 101a of the side plate 1a. Moreover, the low friction surface part 9 is provided in the position which overlaps with the whole region of the inner surface 101a of the side plate 1a when seen from the axial direction (Y direction). The low friction surface portion 9b is made of Teflon.

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

  In the third embodiment, as in the first embodiment, the friction coefficient with respect to the discharge material disposed on the mutually opposing inner surfaces 101a of the pair of side plates 1a of the treatment tank 1 and fed by the rotating body 3 is greater than that of the side plates 1a. Low friction surface portion 9b is provided. Thereby, the discharge can be efficiently discharged from the solid discharge port 2c.

  Moreover, in 3rd Embodiment, as mentioned above, the low friction surface part 9b is comprised with the board | plate material arrange | positioned at the inner surface 101a of the side plate 1a. Thereby, since the low friction surface portion 9b is constituted by a member different from the side plate 1a, when the low friction surface portion 9b is deteriorated, the function of the low friction surface portion 9b can be recovered by replacing the plate material. it can. Thereby, the low friction surface part 9b excellent in maintainability can be provided. The low friction surface portion 9b is configured to be removable and replaceable.

(Modification)
The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is shown not by the above description of the embodiment but by the scope of claims for patent, and further includes all modifications (modifications) within the meaning and scope equivalent to the scope of claims for patent.

  For example, in the first and third embodiments, the low friction surface portion is provided at a position overlapping the entire area of the side plate when viewed from the axial direction, and in the second embodiment, the low friction surface portion is vertically Although the example provided in the vicinity of the rotating bodies arranged to face each other in two rows is shown, the present invention is not limited to this. In this invention, you may provide a low friction surface part only in the position which contacts the edge part of the axial direction of the discharge | emission material between the most downstream rotary body and a solid discharge port. In addition, the low friction surface portion overlaps with the region between the plurality of rotating bodies arranged in two upper and lower rows as viewed from the axial direction on the inner surface of the side plate, and is in a position where it comes into contact with the discharge material sent by the rotating body. May be provided only.

  Moreover, in the said 1st-3rd embodiment, although the example which formed the low friction surface part from the resin material containing a fluorine was shown, this invention is not limited to this. In the present invention, the low friction surface portion may be formed from other than a resin material containing fluorine. For example, the low friction surface portion may be formed from a resin material having self-lubricating properties such as MC nylon (registered trademark).

  Moreover, although the example which provided the low friction surface part only in the side plate was shown in the said 1st-3rd embodiment, this invention is not limited to this. In the present invention, in addition to the side plate, a low friction surface portion may be provided in addition to the side plate. For example, in addition to the side plate, a low friction portion may be provided on the inner surface of the discharge chute.

  Moreover, although the example which provided the press member which presses a pressurization board was shown in the said 1st-3rd embodiment, this invention is not limited to this. In the present invention, it is not necessary to provide a pressing member that presses the pressure plate. In this case, the pressurizing plate may be configured to pressurize the discharged matter by its own weight, for example.

  Moreover, in the said 1st-3rd embodiment, the structure in which the filter piece of a laminated | stacked rotary filter body contains three types of filter pieces, a large diameter disc filter piece, a small diameter disc filter piece, and a medium diameter disc filter piece. However, the present invention is not limited to this. In the present invention, the filter pieces of the laminated rotary filter body may be a combination other than the three types. For example, two or less types of filter pieces may be combined and stacked, or four or more types of filter pieces may be combined and stacked.

  Moreover, in the said 1st-3rd embodiment, although the medium diameter disc filter piece of the laminated | stacked rotary filter body showed the example of the structure formed with resin, this invention is not limited to this. In the present invention, the medium-diameter disc filter piece may be formed of a material other than resin.

  In the first embodiment, the end side portion is configured such that the axial width gradually increases from the rotation shaft side toward the front in the discharge direction of the discharged matter. Not limited to this. In this invention, it is not necessary to comprise an end side part so that the width of an axial direction may become large gradually as it goes to the discharge direction front of discharge | emission material from the rotating shaft side. For example, the axial width of the end portion may be constant.

DESCRIPTION OF SYMBOLS 1 Treatment tank 1a Side plate 2c Solid discharge port 3 Rotating body 9, 9a, 9b Low friction surface part 30 Laminated rotating filter body 31 Rotating shaft 32 Medium diameter disc filter piece (filter piece)
33 Small-diameter disc filter pieces (filter pieces)
34 Large-diameter disc filter pieces (filter pieces)
100, 200, 300 Solid-liquid separator 101a Inner surface

Claims (7)

Each including a rotary shaft and a plurality of laminated rotary filter bodies each having a plurality of filter pieces stacked along the axial direction of the rotary shaft and having a filtration groove formed between the filter pieces. A rotating body to be arranged;
A solid discharge port through which discharge containing solid components of the stock solution sent by the rotating body is discharged;
A treatment tank including a pair of side plates disposed so as to oppose each other on both end sides in the axial direction of the rotating body;
A solid-liquid separation device comprising: a low friction surface portion provided on inner surfaces facing each other of the pair of side plates and having a friction coefficient with respect to the discharged material sent by the rotating body lower than that of the side plates.   The low friction surface portion overlaps an area between the plurality of upper and lower rotating bodies arranged in the two upper and lower rows when viewed from the axial direction, of the inner surfaces of the pair of side plates, and is sent by the rotating body The solid-liquid separation device according to claim 1, wherein the solid-liquid separation device is provided at a position in contact with the discharged matter.   The said low friction surface part is provided in the position which contacts the edge part of the said axial direction of the said discharge | emission thing between the said rotary body and the solid discharge port of the most downstream. Liquid separation device.   The solid-liquid separator according to claim 1, wherein the low friction surface portion is formed as a coating layer that covers the inner surface of the side plate.   The solid-liquid separator according to any one of claims 1 to 3, wherein the low friction surface portion is configured by a plate material disposed on the inner surface of the side plate. The side plate is made of stainless steel,
The solid-liquid separator according to any one of claims 1 to 5, wherein the low friction surface portion is formed of a material having a lower friction coefficient than the stainless steel.   The solid-liquid separation device according to claim 6, wherein the low friction surface portion is formed of a resin material containing fluorine.

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