JP6628632B2 - Solid-liquid separation device - Google Patents

Description

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

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

  Patent Document 1 discloses a rotating body including a rotating shaft, a laminated rotating filter body having a plurality of filter pieces, a processing tank including a pair of side plates disposed at both ends of the rotating body, and a solid discharge port. And a pressurizing plate for pressurizing the discharge discharged from the solid discharge port are disclosed. The pressure plate is formed in a flat plate shape extending in the axial direction of the rotation shaft. Note that the axial direction of the rotating shaft is orthogonal to the direction in which the waste is fed.

JP-A-10-137795

  However, in the conventional solid-liquid separation device as described in Patent Document 1, when a solid-liquid separation process is performed on an object having poor slippage and discharged, the discharged material comes into contact with a pair of side plates of the processing tank, thereby causing a problem. Due to the frictional force (brake) applied to the discharge material in the outer side in the direction, compared with the central portion sandwiched between the pair of side plates, the portion near the pair of side plates has a solid discharge port. It is considered that there is an inconvenience that the amount of discharged waste is reduced. For this reason, there is a problem that the discharged material is not discharged efficiently from the solid discharge port because the discharged material is not uniformly discharged in the axial direction of the 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 capable of efficiently discharging a discharge from a solid discharge port. That is.

A solid-liquid separation device according to one aspect of the present invention has a rotating shaft and a plurality of filter pieces stacked along an axial direction of the rotating shaft, and a stacked rotary filter having a filtration groove formed between the filter pieces. Body, each of which includes a plurality of rotating bodies arranged in upper and lower two rows, a solid discharge port through which a discharge containing a solid component of the undiluted solution sent by the rotating body is discharged, and A processing tank including a pair of side plates arranged to face each other, and a processing tank including a pair of side plates extending in a direction perpendicular to the axial direction are provided only on a pair of inner surfaces facing each other, respectively, for a discharge sent by a rotating body. A low friction surface portion having a lower coefficient of friction than the side plates.

  In the solid-liquid separation device according to one aspect of the present invention, as described above, each of the pair of side plates of the processing tank is disposed on the opposing inner surfaces, and has a lower coefficient of friction with respect to the discharge sent by the rotating body than the side plates. A low friction surface is provided. Thus, a low friction surface portion is provided between the discharged material and the pair of side plates, so that a frictional force (brake) applied to the discharged material from the side surface side as compared with a case where the discharged material contacts the pair of side plates. Can be reduced, so that a difference in resistance force applied between the inside and the outside (side plate side) of the discharge can be suppressed from increasing. As a result, the discharge can be uniformly discharged 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 one aspect, preferably, the low friction surface portion overlaps a region between a plurality of rotating bodies arranged in two rows in the upper and lower rows when viewed from the axial direction, of the inner surfaces of the pair of side plates. In addition, it is provided at a position where it comes into contact with the discharge sent by the rotating body. According to this structure, since the low friction surface portion is provided at a portion of the inner surface of the side plate where the waste comes into contact, the frictional force applied to the waste can be effectively reduced.

  In the solid-liquid separation device according to the one aspect, the low friction surface portion is preferably provided at a position in contact with an axial end of the discharged material between the most downstream rotating body and the solid discharge port. With this configuration, the waste is pushed out by the power from the rotating body being applied to the waste from behind, and the lowermost rotating body and the solid are located at a position where the influence of the frictional force from the side plate is increased. Since the low friction surface portion is provided at a position in contact with the end of the discharge in the axial direction between the discharge port and the discharge port, the frictional force applied to the discharge can be effectively reduced.

  In the solid-liquid separation device according to the one aspect, preferably, the low-friction surface portion is formed as a coating layer covering an inner surface of the side plate. With this configuration, the low friction surface portion can be easily formed only by coating the side plate.

  In the solid-liquid separation device according to the one aspect, preferably, the low friction surface portion is made of a plate material arranged on an inner surface of the side plate. With this configuration, since the low friction surface portion is formed by a member different from the side plate, when the low friction surface portion is deteriorated, the function of the low friction surface portion can be restored by replacing the plate material. it can. Thereby, a low friction surface portion excellent in maintainability can be provided.

  In the solid-liquid separation device according to the one aspect, preferably, the side plate is formed of stainless steel, and the low friction surface portion is formed of a material having a lower friction coefficient than stainless steel. According to this structure, the frictional force applied to the discharge can be effectively reduced by the low friction surface portion having a lower friction coefficient than stainless steel.

  In this case, preferably, the low friction surface portion is formed from a resin material containing fluorine. According to this structure, the fluorine-containing resin material can repel water contained in the effluent, so that the frictional force applied to the effluent can be reduced more effectively.

  According to the present invention, as described above, it is possible to provide a solid-liquid separation device capable of efficiently discharging discharged matter from a solid discharge port.

It is a sectional view of a side of a solid-liquid separation device by a 1st embodiment of the present invention. 1 is a side view of a solid-liquid separation device according to a first embodiment of the present invention. FIG. 3 is a sectional view taken along the line 400-400 in FIG. 2. FIG. 2 is an enlarged plan view showing an adjacent state of the stacked rotary filter of the solid-liquid separation device according to the first embodiment of the present invention. FIG. 2 is an enlarged side view of the laminated rotary filter of the solid-liquid separation device according to the first embodiment of the present invention. FIG. 2 is an enlarged front view of a main part of the laminated rotary filter of the solid-liquid separation device according to the first embodiment of the present invention. FIG. 4 is a partially enlarged view of a P1 part shown in FIG. 3. It is a typical side view for explaining the position where the low friction surface part of a 1st embodiment of the present invention is provided. It is a typical side view for explaining the position where the low friction surface part of a 2nd embodiment of the present invention is provided. It is sectional drawing from the front side of the solid-liquid separation apparatus 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 separation device 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 section 8, and a low friction surface section 9. Further, the solid-liquid separation device 100 is configured so that the stock solution is supplied from a stock solution supply port 2a provided in the upper part of the processing tank 1. Further, the solid-liquid separation device 100 is configured to separate the supplied undiluted 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 2b provided in a lower part of the processing tank 1. Further, the solid-liquid separation device 100 is configured to discharge the waste containing the solid component of the undiluted solution sent by the rotating body 3 from a solid discharge port 2c provided at the upper side of the processing tank 1.

  The processing tank 1 has a rectangular parallelepiped shape. Further, the processing tank 1 is disposed on a pair of side plates 1a arranged on both end sides (Y1 direction side and Y2 direction side) of the rotating body 3, and on the undiluted solution supply port 2a side (X1 direction side) of the pair of side plates 1a. And a front plate 1c arranged on the solid discharge port 2c side (X2 direction side) of the pair of side plates 1a. The pair of side plates 1a are formed of stainless steel. In FIG. 1, since the inner surfaces 101a of the pair of side plates 1a are not directly visible due to the low friction surface portion 9, the inner surfaces 101a (the pair of side plates 1a) are shown by broken lines.

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

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

  The stacked rotary filter 30 is arranged in a plurality of upper and lower rows toward the solid discharge port 2c so as to send the solid component of the supplied stock solution to the solid discharge port 2c. Specifically, the laminated rotary filter 30 is provided so that a total of ten, six in the lower row and four in the upper row, are arranged vertically. The interval between the upper row of the stacked rotary filter bodies 30 and the lower row of the stacked rotary filter bodies 30 in the vertical direction (Z direction) is determined from the stock solution supply port 2a side (X1 direction side) to the solid discharge port 2c side (X2 (Direction side). Further, the upper and lower stacked rotary filters 30 are arranged so as to be inclined obliquely upward from the stock solution supply port 2a side (X1 direction side) to the solid discharge port 2c side (X2 direction side). ing.

  The six stacked rotary filters 30 in the lower row are arranged at predetermined intervals, and are configured to convey solid components by rotating in the same direction (clockwise in FIG. 1). Have been. The four stacked rotary filters 30 in the upper row are arranged at a predetermined interval, and rotate in the same direction (counterclockwise in FIG. 1) to convey the solid component. Is configured.

  As shown in FIG. 3, the stacked rotary filter 30 includes a plurality of filter pieces stacked along a rotation axis 31. Specifically, as shown in FIGS. 4 to 6, the laminated rotary filter 30 includes a plurality of medium-diameter disc filters 32, a plurality of small-diameter disc filters 33, and a plurality of large-diameter disc filters. 34. The rotation shaft 31 is arranged to extend in the width direction (Y direction). On the rotating shaft 31, a small-diameter disc filter 33, a medium-diameter disc filter 32, a large-diameter disc filter 34, and a medium-diameter disc filter 32 are laminated 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 stacked. Then, a plurality of filter pieces are laminated by repeating the above order. 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.

  In addition, 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 comes into contact with another medium-diameter disc filter piece 32 adjacent in the axial direction (Y direction). Then, a filtration groove S is formed between the medium-diameter disc filter pieces 32 separated by the projections 32a. As shown in FIG. 5, four convex portions 32a are arranged at equal intervals (90-degree intervals) along the circumferential direction. As shown in FIGS. 5 and 6, the convex portion 32 a is configured to be inserted into the cutout portion 33 a of the small-diameter disc filter piece 33 or the hole 34 a of the large-diameter disc filter piece 34. The rotating shaft 31 is inserted into the shaft hole 32 a of the medium-diameter disc filter 32, the shaft hole 33 b of the small-diameter disc filter 33, and the shaft hole 34 b of the large-diameter disc filter 34. One end side (Y1 direction side) and the other end side (Y2 direction side) of the rotating shaft 31 are rotatably supported by bearings 35 (see FIG. 3).

  The small-diameter disc filter 33 is swingably disposed in the filtration groove S between the adjacent medium-diameter disc filters 32. In addition, a filtered water outflow groove G is formed in a portion of the filtration groove S between the adjacent medium diameter disk filter pieces 32 except for the small diameter disk filter piece 33. The large-diameter disc filter piece 34 is swingably disposed in the filtration groove S between the adjacent medium-diameter disc filter pieces 32. With this configuration, it is possible to suppress the filtering groove from being clogged by the swinging of the large-diameter disc filter and the small-diameter disc filter. In addition, a filtration water outflow groove G is formed in a portion of the filtration groove S between the adjacent medium diameter disk filter pieces 32 except for the large diameter disk filter piece 34. The liquid component in the undiluted solution is filtered through these drain water outflow grooves G.

  In addition, as shown in FIG. 4, the large-diameter disc filter piece 34 is disposed so as to enter the filtration groove S of the laminated rotary filter body 30 adjacent to the solid component sending direction (X direction and Z direction). ing. That is, the adjacent laminated rotary filter 30 is arranged such that the position where the large-diameter disc filter 34 is disposed in the filtration groove S and the position where the small-diameter disc filter 33 are disposed face each other. Are located. The large-diameter disc filter 34 is configured to enter the filtration groove S in which the small-diameter disc filter 33 of the adjacent rotary filter body 30 is disposed, and scrape off the solid component. .

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

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

  As shown in FIG. 1, one sealing member 5 is provided between the rear plate 1 b (the surface in the X1 direction side) of the processing tank 1 and the laminated rotary filter 30 arranged on the rear plate 1 b side of the lower row. Are located. The seal member 5 is configured to seal a gap between the lowermost row of the stacked rotary filter bodies 30 on the rear plate 1b side. Thus, the seal member 5 is configured to prevent the undiluted solution from flowing out to the liquid outlet 2b as it is.

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

  As shown in FIG. 1, the discharge chute 7 is provided at the solid discharge port 2c, and constitutes a discharge path for the discharge discharged from the processing tank 1. Further, 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) facing in the axial direction (Y direction), and a bottom plate 71.

  The horizontal plates 70 are attached to each of the pair of side plates 1a of the processing tank 1, and are arranged to face each other in the axial direction (Y direction). The interval in the axial direction between the pair of horizontal plates 70 is configured to be slightly larger than the interval in the axial direction between the pair of side plates 1 a of the processing tank 1. For example, the distance between the pair of horizontal plates 70 is about 530 mm, and the distance between the pair of side plates 1a of the processing tank 1 is about 500 mm. Thus, the pair of horizontal plates 70 is configured to suppress a large frictional force from acting on the discharge discharged from the processing tank 1 into the discharge chute 7. That is, the discharge chute 7 is configured to be able to discharge the discharge smoothly.

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

  The pressing unit 8 includes a pressing plate 81 and a pressing member 82 as shown in FIG.

  The pressure plate 81 is one plate-shaped member. The pressure plate 81 is made of metal such as stainless steel. The pressure plate 81 is provided at the solid discharge port 2c. The pressing plate 81 is arranged inside the discharge chute 7 and is rotatably attached to a rotating shaft 81 a provided on the mounting plate 60. The rotation shaft 81a is provided on the pressing plate 81. The axial direction of the rotating shaft 81a is substantially parallel to the axial direction (Y direction) of the rotating shaft 31 of the rotating body 3. The pressure plate 81 is configured to apply resistance to the discharged material on the bottom plate 71 of the discharge chute 7 from above (Z1 direction side). Further, the pressing plate 81 is configured to apply pressure to the discharged material from above evenly in the axial direction (width direction, Y direction).

  The pressing member 82 is arranged 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 pressing 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 portions 9 are respectively provided on the inner surfaces 101 a of the pair of side plates 1 a of the processing tank 1 that face each other. As shown in FIG. 8, the low friction surface portion 9 is provided over the entire inner surface 101a. Therefore, the low friction surface portion 9 overlaps at least the region between the rotating bodies 3 arranged in a plurality of upper and lower two rows when viewed from the axial direction (Y direction) of the pair of inner surfaces 101a, and the rotating body 3 (A position surrounded by a broken line indicated by reference numeral Q1). Further, the low friction surface portion 9 is at least at a position (a position surrounded by a broken line indicated by reference numeral Q2) in contact with an axial end portion of the discharged matter 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 (shown by a broken line drawn because it is not directly visible by the low friction surface portion 9) is indicated by hatching.

  The low friction surface portion 9 has a lower coefficient of friction with respect to the discharge sent by the rotating body than the side plate 1a. That is, the low friction surface portion 9 is made 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 subjecting the inner surface 101a of the side plate 1a to Teflon (registered trademark) processing.

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

  In the first embodiment, as described above, a low friction coefficient is lower than that of the side plates 1a, which are disposed on the inner surfaces 101a of the pair of side plates 1a of the processing tank 1 that face each other and that are lower than the side plates 1a. A surface portion 9 is provided. Thus, since the low friction surface portion 9 is provided between the discharged material and the pair of side plates 1a, the frictional force applied to the discharged material from the side surface side as compared with the case where the discharged material contacts the pair of side plates 1a. Since the (brake) can be reduced, it is possible to suppress an increase in the difference in resistance applied between the inside and the outside (the side plate 1a side) of the discharge. As a result, the discharge can be uniformly discharged in the axial direction of the solid discharge port 2c, so that the discharge can be efficiently discharged from the solid discharge port 2c.

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

  In the first embodiment, as described above, the low friction surface portion 9 is provided at a position in contact with the axial end of the discharged material between the most downstream rotating body 3 and the solid discharge port 2c. As a result, when the power from the rotating body 3 is applied to the discharged matter from the rear, the discharged matter is pushed out, and the lowermost rotating body 3 and the solid waste discharging position where the influence of the frictional force from the side plate 1a is increased. Since the low friction surface portion 9 is provided at a position in contact with the axial end of the discharge between the outlet 2c, the frictional force applied to the discharge can be effectively reduced.

  In the first embodiment, as described above, the low friction surface portion 9 is formed as a coating layer that covers the inner surface 101a of the side plate 1a. Thereby, the low friction surface portion 9 can be easily formed only by coating 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 lower friction coefficient than stainless steel.

  Further, in the first embodiment, as described above, the low friction surface portion 9 is formed from a resin material containing fluorine. Thereby, the water contained in the effluent can be repelled by the resin material containing fluorine, so that the frictional force applied to the effluent 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. The solid-liquid separation device of the second embodiment has the same configuration as that of the first embodiment except for the low friction surface portion 9a, and therefore, the low friction surface portion 9a will be described below.

  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 9a are provided on inner surfaces 101a of the pair of side plates 1a of the processing bath 1 that face each other. The low friction surface portion 9a is provided in the vicinity of a rotating body that is disposed opposite to the upper and lower two rows of the inner surface 101a. More specifically, the low friction surface portion 9a overlaps with a region between a plurality of rotating bodies 3 arranged in a plurality of upper and lower rows, when viewed from the axial direction (Y direction), of the pair of inner surfaces 101a. (A position surrounded by a broken line indicated by reference numeral Q1). Further, the low friction surface portion 9a is provided at a position (a position surrounded by a broken line indicated by reference numeral Q2) in contact with an axial end of the discharged material between the most downstream rotating body 3 and the solid discharge port 2c. ing. Further, the low friction surface portion 9a is provided at a position of the pair of inner surfaces 101a that overlaps with the rotating body 3 that is disposed opposite to the upper and lower two rows when viewed from the axial direction (Y direction). In FIG. 9, the range in which the low friction surface portion 9a is provided for the side plate 1a on the Y2 direction side is indicated by hatching.

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

  In the second embodiment, similarly to the first embodiment, the pair of side plates 1a of the processing tank 1 are arranged on the inner surfaces 101a facing each other, and the coefficient of friction with respect to the discharge sent by the rotating body 3 is higher than that of the side plates 1a. Low friction surface portion 9a is provided. Thereby, the discharged material 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 formed 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 formed by a plate material will be described. The solid-liquid separation device of the third embodiment has the same configuration as that of the first embodiment except for the low friction surface portion 9b, and therefore, the low friction surface portion 9b will be described below.

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

  As shown in FIGS. 10 and 11, the low friction surface portion 9b is made of a plate (including a sheet) disposed on the inner surface 101a of the side plate 1a. The low friction surface portion 9b is in contact with the inner surface 101a of the side plate 1a. Further, the low friction surface portion 9 is provided at a position overlapping the entire area of the inner surface 101a of the side plate 1a when viewed from the axial direction (Y direction). Note that the low friction surface portion 9b is formed of Teflon.

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

  In the third embodiment, similarly to the first embodiment, the pair of side plates 1a of the processing tank 1 are disposed on the inner surfaces 101a facing each other, and the coefficient of friction with respect to the discharge sent by the rotating body 3 is higher than that of the side plates 1a. Low friction surface portion 9b is provided. Thereby, the discharged material can be efficiently discharged from the solid discharge port 2c.

  In the third embodiment, as described above, the low friction surface portion 9b is made of the plate material disposed on the inner surface 101a of the side plate 1a. As a result, the low friction surface portion 9b is constituted by a member different from the side plate 1a. Therefore, when the low friction surface portion 9b deteriorates, the function of the low friction surface portion 9b can be restored by replacing the plate material. it can. Thereby, it is possible to provide the low friction surface portion 9b having excellent maintainability. Note that the low friction surface portion 9b is configured to be removable and replaceable.

(Modification)
It should be noted that the embodiments disclosed this time are illustrative in all aspects and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description of the embodiments, and includes all modifications (modifications) within the scope and meaning equivalent to the terms of the claims.

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

  Further, in the first to third embodiments, the example in which the low friction surface portion is formed from the fluorine-containing resin material has been described, but the present invention is not limited to this. In the present invention, the low friction surface portion may be formed from a material other than the fluorine-containing resin material. For example, the low friction surface portion may be formed from a self-lubricating resin material such as MC nylon (registered trademark).

  Further, in the first to third embodiments, the example in which the low friction surface portion is provided only on the side plate has been described, but the present invention is not limited to this. In the present invention, in addition to the side plate, a low friction surface portion may be provided other than the side plate. For example, a low friction portion may be provided on the inner surface of the discharge chute in addition to the side plate.

  In the first to third embodiments, the example in which the pressing member that presses the pressing plate is provided has been described, but the present invention is not limited to this. In the present invention, it is not necessary to provide a pressing member for pressing the pressing plate. In this case, for example, the pressure plate may be configured to press the discharge by its own weight.

  In the first to third embodiments, the filter piece of the laminated rotary filter body includes three types of filter pieces: a large-diameter disc filter, a small-diameter disc filter, and a medium-diameter disc filter. However, the present invention is not limited to this. In the present invention, the filter pieces of the laminated rotary filter body may be combinations other than three types. For example, two or less types of filter pieces may be combined and laminated, or four or more types of filter pieces may be combined and laminated.

  Further, in the first to third embodiments, the example of the configuration in which the medium-diameter disc filter piece of the laminated rotary filter body is formed of the resin has been described, but the present invention is not limited to this. In the present invention, the medium-diameter disc filter may be formed of a material other than the resin.

  Further, in the first embodiment, an example is described in which the end portion is configured such that the width in the axial direction gradually increases from the rotation shaft side toward the front in the discharge direction of the discharged material. Not limited to this. In the present invention, the end portion does not have to be configured such that the width in the axial direction gradually increases from the rotation shaft side toward the front in the discharge direction of the discharge. For example, the axial width of the end portion may be constant.

DESCRIPTION OF SYMBOLS 1 Processing 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 disk filter piece (filter piece)
33 small diameter disc filter (filter)
34 Large Diameter Disc Filter (Filter Piece)
100, 200, 300 Solid-liquid separator 101a Inner surface

Claims (7)

A rotary shaft, including a plurality of filter pieces stacked along the axial direction of the rotary shaft, each including a stacked rotary filter body in which a filtration groove is formed between the filter pieces; A rotating body to be arranged,
A solid discharge outlet from which a discharge containing a solid component of the undiluted solution sent by the rotating body is discharged,
A treatment tank including a pair of side plates arranged to face each other at both ends in the axial direction of the rotating body,
A low friction surface portion, which is provided only on a pair of inner surfaces facing each other of the pair of side plates extending in a direction perpendicular to the axial direction, and has a lower coefficient of friction for the discharged material sent by the rotating body than the side plates. A solid-liquid separation device.   The low friction surface portion overlaps with an area between the plurality of rotating bodies arranged in the upper and lower two rows, as 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 separator according to claim 1, wherein the solid-liquid separator is provided at a position where the solid-liquid separator contacts the discharged material.   3. The solid according to claim 1, wherein the low-friction surface portion is provided at a position in contact with the axial end of the discharged material between the most downstream rotating body and the solid discharge port. 4. Liquid separation device.   The solid-liquid separation device according to any one of claims 1 to 3, wherein the low friction surface portion is formed as a coating layer covering the inner surface of the side plate.   The solid-liquid separation device according to any one of claims 1 to 3, wherein the low friction surface portion is formed of a plate material disposed on the inner surface of the side plate. The side plate is formed of stainless steel,
The solid-liquid separation device 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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