JP2019042685A - Solid-liquid separation device - Google Patents

Abstract

An object of the present invention is to suppress clogging of solid components of an object to be treated while suppressing an increase in time required for solid-liquid separation processing even when the load degree of the laminated rotary filter is large, and low water content The present invention provides a solid-liquid separation device capable of continuously discharging the solid components of the material to be treated.
A solid-liquid separation device (100) includes a rotary shaft (31) and a plurality of filter pieces stacked along the rotary shaft (31), and a laminated rotary filter (3) having a filtration groove (S) formed between the filter pieces. , A motor 2 for driving the rotation shaft 31 to rotate, an inverter 22 for detecting the degree of load of the laminated rotary filter 3, and a control unit 8 for controlling the number of rotations of the laminated rotary filter 3. The control unit 8 is configured to perform control to increase the number of rotations of the laminated rotary filter 3 when the load degree detected by the inverter 22 is equal to or greater than the first threshold value.
[Selected figure] Figure 9

Description

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

  DESCRIPTION OF RELATED ART Conventionally, the solid-liquid separation apparatus provided with a lamination | stacking rotary filter body is known (for example, refer patent document 1).

  Patent Document 1 discloses a rotary filter (laminated rotary filter) including a rotary shaft and a plurality of disks stacked along the rotary shaft, a motor for driving the rotary shaft to rotate, and a torque of the rotary shaft. There is disclosed a sludge dewatering apparatus (solid-liquid separation apparatus) including torque detection means for detecting a value and rotation control means for controlling the number of rotations of the rotary filter. In the sludge dewatering treatment apparatus of Patent Document 1, the rotation control means performs control to reduce the number of rotations of the rotary filter body in order to achieve smooth sludge treatment operation when the torque value exceeds the torque upper limit value. Is configured.

Japanese Patent Application Publication No. 2002-035798

  However, in the sludge dewatering treatment apparatus (solid-liquid separation apparatus) of Patent Document 1, when the torque value (the degree of load of the laminated rotary filter) exceeds the torque upper limit value (the degree of load upper limit value), Since the rotation speed is reduced, there is a disadvantage that the discharge of the solid component of the dewatered sludge is delayed. In addition, when the torque value for rotating the rotary filter body exceeds the torque upper limit value, the conveyance resistance of the solid component of the sludge becomes large, and there is a disadvantage that it becomes easy to be blocked. For this reason, when the load degree of the laminated rotary filter is large, the time required for the solid-liquid separation process becomes long, and there is a problem that the solid component of the sludge tends to be clogged.

  The present invention has been made to solve the above-described problems, and one object of the present invention is to solve the time required for solid-liquid separation even when the degree of loading of the laminated rotary filter is large. A solid-liquid separation device capable of continuously discharging solid components of an object to be treated having a low water content while suppressing inhibition of lengthening and suppressing clogging by the solid component of the object to be treated It is.

  In order to achieve the above object, the solid-liquid separation device in one aspect of the present invention includes a rotating shaft and a plurality of filter pieces stacked along the rotating shaft, and a filtering groove is formed between the filter pieces. It comprises: a laminated rotary filter body, a motor for driving the rotary shaft to rotate, a load detection unit for detecting the degree of load of the laminated rotary filter body, and a control unit for controlling the number of rotations of the laminated rotary filter body The unit is configured to perform control to increase the number of rotations of the laminated rotary filter when the degree of load detected by the load detection unit is equal to or greater than the first threshold value.

  In the solid-liquid separation device according to one aspect of the present invention, as described above, when the load degree detected by the load detection unit is equal to or higher than the first threshold value, control is performed to increase the number of rotations of the laminated rotary filter. Provide a control unit. As a result, when the solid-liquid separation process proceeds, the transport resistance increases, and when the degree of load increases, the number of rotations of the laminated rotary filter can be increased, so that the laminated rotary filter is clogged. The solid components of the object to be treated can be discharged rapidly in advance. In addition, if the first threshold is set to a load degree that is likely to be clogged by the solid component of the object if the processing proceeds as it is, the solid component is obtained when the load degree is equal to or higher than the first threshold. Can be prevented from being clogged by the solid component of the object to be treated. As a result, even when the loading degree of the laminated rotary filter is large, it is possible to suppress the clogging by the solid component of the object to be treated while suppressing the increase of the time required for the solid-liquid separation treatment. It is possible to continuously discharge the solid component of the water content treated material.

  In the solid-liquid separator according to the above aspect, preferably, the stacked rotary filters are arranged in a plurality of upper and lower rows toward the solid discharge port so as to send solid components of the stock solution to be supplied to the solid discharge port. And includes a first laminated rotary filter disposed on the solid outlet side and a second laminated rotary filter disposed on the undiluted solution supply port side to which the stock solution is supplied, and the control unit During normal operation of liquid separation, the first laminated rotary filter is rotated at a rotation speed smaller than that of the second laminated rotary filter, and the load degree of the first laminated rotary filter detected by the load detection unit When the threshold value is equal to or greater than the first threshold value, control is performed to increase the rotational speed of the first laminated rotary filter body during normal operation. According to this structure, the moisture of the object to be treated can be filtered by the second laminated rotary filter during the normal operation of solid-liquid separation, and the subject to which the water is filtered by the first laminated rotary filter. The processed material can be squeezed and dehydrated. In addition, when the loading degree is equal to or more than the first threshold value, the sufficiently dewatered object can be discharged quickly by setting the rotation speed of the first laminated rotary filter to be larger than that during normal operation. While being possible, it can control effectively blocking with the solid component of the dehydrated processed material.

  In this case, preferably, when the load degree of the first laminated rotary filter body detected by the load detection unit is equal to or greater than the first threshold value, the control unit performs the second laminated number of revolutions of the first laminated rotary filter body. It is configured to perform control so as to be approximately equal to the number of rotations of the rotary rotor. According to this structure, the rotational speed of the first laminated rotary filter can be made as large as the rotational speed of the second laminated rotary filter. It is possible to reduce the difference between the amount of the object to be processed sent to the laminated rotary filter and the amount of the object to be discharged from the first laminated rotary filter. As a result, the solid component of the object to be treated can be prevented from being further compressed (dehydrated) in the first laminated rotary filter, so that the blockage by the solid component of the object to be treated is effectively suppressed. be able to.

  Preferably, in the configuration in which the laminated rotary filter includes the first laminated rotary filter and the second laminated rotary filter, a plurality of first laminated rotary filters are provided, and the load detection unit is The control unit is provided for each of the plurality of first laminated rotary filters, and the control unit is configured to control at least one of the loading degrees of the plurality of first laminated rotary filters detected by the load detection unit. In the case of one or more threshold values, control is performed to increase the number of rotations of all the first laminated rotary filters. According to this structure, even when the load is concentrated on a part of the first laminated rotary filters, the solid components of the object to be treated can be increased by increasing the number of rotations of all the first laminated rotary filters. Since it can be discharged quickly, the load on the first laminated rotating filter can be reduced quickly.

  In this case, preferably, the control unit determines that at least one of the loading degrees of the plurality of first laminated rotary filters is greater than or equal to the first threshold value and the rotational speeds of all the first laminated rotary filters are Is increased, the number of rotations of the first laminated rotary filter is returned to the original value when all the load degrees of the plurality of first laminated rotary filters detected by the load detection unit are less than the first threshold value It is configured to perform control. According to this structure, it is possible to prevent the number of rotations of the first laminated rotary filter from being returned to the original state even though the load degree of a part of the first laminated rotary filter is large. .

  In the solid-liquid separation device according to the above aspect, preferably, the control unit is configured to detect the load after a predetermined time has elapsed when the load degree is equal to or greater than the first threshold and the rotational speed of the laminated rotary filter is increased. When the load degree detected by the above is less than the first threshold value, control is performed to restore the rotational speed of the laminated rotary filter. According to this structure, it is possible to prevent the operation from being continued in the state where the number of rotations of the laminated rotary filter is increased, so that the object to be treated is discharged in an insufficient state. It can be suppressed.

  In the solid-liquid separation device according to the above aspect, preferably, the control unit rotates the laminated rotary filter when the load degree detected by the load detection unit is equal to or higher than a second threshold that is greater than the first threshold. Is configured to perform control to stop the According to this structure, the rotation of the laminated rotary filter can be stopped when the load degree becomes larger than the first threshold value and becomes equal to or higher than the second threshold value. It is possible to suppress deformation of the rotating shaft and the respective filter pieces due to the continuation of the operation in a state of being further increased.

  In the solid-liquid separation device according to the above aspect, preferably, the control unit increases the number of revolutions of the laminated rotary filter when the load degree detected by the load detection unit is equal to or higher than the first threshold value. It is configured to perform control to reduce the supply amount of. According to this structure, the amount of the object to be treated flowing into the laminated rotary filter can be reduced, and the amount of the object to be discharged from the laminated rotary filter can be increased. It is possible to reduce the amount of the processing object staying in the laminated rotary filter. As a result, the transport resistance can be effectively reduced, so that the degree of load can be effectively reduced.

  In the solid-liquid separation device according to the above aspect, preferably, the filter pieces include a large diameter disk filter piece, a small diameter disk filter piece, and a medium diameter disk filter piece, and the adjacent medium diameter disk filters are included. A large diameter disc filter piece or a small diameter disc filter piece is arranged swingably between the pieces, and the medium diameter disc filter pieces form a filtration groove between the adjacent medium diameter disc filter pieces. For this purpose, the large diameter disc filter piece is disposed so as to enter into the filtration groove of the laminated rotary filter body adjacent to the solid component feeding direction, having a convex portion in contact with the adjacent medium diameter disc filter piece. The medium diameter disc filter pieces are made of resin. 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, the weight of the laminated rotary filter can be reduced as compared with the case where the medium-diameter disk filter pieces are formed of metal. Thereby, even when the number of stacked filter pieces is increased to increase the size, it is possible to suppress an increase in load applied to the rotation shaft. And, by combining the configuration of such a filter piece and the configuration of the solid-liquid separation device according to the above-described one aspect, in the solid-liquid separation device capable of suppressing an increase in load applied to the rotation shaft, It is possible to suppress clogging by the solid component of the object while suppressing an increase in the time required for the solid-liquid separation treatment.

  In the solid-liquid separation device according to the aforementioned aspect, preferably, the load detection unit is configured to detect a supply power value of an inverter that controls the frequency of AC power supplied to the motor as a load degree. According to this structure, it is possible to detect the degree of load using the supplied power value detection unit generally provided in the inverter, and therefore, it is not necessary to provide a detection unit such as a sensor separately from the inverter. Thereby, an increase in the number of parts can be suppressed. Further, the load degree can be easily obtained by detecting the power supply value of the inverter.

  According to the present invention, as described above, even when the load degree of the laminated rotary filter is large, the solid component of the object to be treated is clogged while suppressing an increase in the time required for the solid-liquid separation treatment. The solid component of the low moisture content material to be treated can be continuously discharged.

It is side surface sectional drawing of the solid-liquid separator by one Embodiment of this invention. It is a side view of the solid-liquid separation device by one embodiment of the present invention. It is front sectional drawing of the solid-liquid separator by one Embodiment of this invention. It is the block diagram showing the control composition of the solid-liquid separation device by one embodiment of the present invention. It is the enlarged plan view which showed the adjacent state of the lamination | stacking rotary filter of the solid-liquid separation apparatus by one Embodiment of this invention. It is the disassembled perspective view which showed the medium diameter disc filter piece, the small diameter disc filter piece, and the large diameter disc filter piece of the lamination | stacking rotary filter of the solid-liquid separator by one Embodiment of this invention. It is the side view which showed the medium-diameter disc filter piece of the lamination | stacking rotary filter of the solid-liquid separator by one Embodiment of this invention. It is the elements on larger scale of the lamination | stacking rotary filter of the solid-liquid separation apparatus by one Embodiment of this invention. It is a flowchart for demonstrating the rotation speed control processing by the control part of the solid-liquid separation apparatus by one Embodiment of this invention. It is a flowchart for demonstrating the rotation speed control processing by the control part of the solid-liquid separator according to the modification of one embodiment of the present invention.

  Hereinafter, embodiments of the present invention will be described based on the drawings.

(Configuration of solid-liquid separation device)
A solid-liquid separator 100 according to an embodiment of the present invention will be described with reference to FIGS. 1 to 8. As shown in FIGS. 1 and 2, the solid-liquid separation device 100 according to one embodiment of the present invention includes a treatment tank 1, a plurality of motors 2, a plurality of stacked rotary filters 3, and a stock solution supply port 4. , A solid outlet 5, a liquid outlet 6, and a water level sensor 7. In addition, as shown in FIG. 4, the solid-liquid separation device 100 is provided with a control unit 8 and a power supply 9. Further, as shown in FIG. 1, the solid-liquid separator 100 is configured to be supplied with the stock solution from a stock solution supply port 4 provided in 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 (water). Further, the solid-liquid separator 100 is configured to discharge the separated liquid component from the liquid outlet 6 provided in the lower part of the processing tank 1. The solid-liquid separator 100 is also configured to discharge the separated solid component from the solid outlet 5 provided at the upper side of the processing tank 1.

  A plurality of laminated rotary filters 3 are arranged in two rows in the upper and lower rows toward the solid discharge port 5 so as to send the solid components of the stock solution to be supplied to the solid discharge port 5. Specifically, the laminated rotary filter body 3 has eight laminated rotary filter bodies 3a, 3b, 3c, 3d, 3e, 3f and 3h in the lower row, and the laminated rotary filter bodies 3i, 3j in the upper row , 3k, 3l, 3m and 6n in total of 14 are provided. Of the fourteen laminated rotary filters 3, four of the stacked rotary filters 3g, 3h, 3m and 3n are disposed on the solid discharge port 5 side (X2 direction side). Further, among the 14 laminated rotary filters 3, 10 of the laminated rotary filters 3a to 3f and 3i to 3l are disposed on the stock solution supply port 4 side (X1 direction side). In the dewatering process, the laminated rotary filters 3g, 3h, 3m and 3n are rotated at low speed. For example, the laminated rotary filters 3g, 3h, 3m and 3n are rotated at a rotational speed of about 0.25 rpm to 1 rpm. In the dewatering process, the laminated rotary filters 3a to 3f and 3i to 3l are rotated at high speed. For example, the laminated rotary filters 3a to 3f and 3i to 3l are rotated at a rotational speed of about 0.75 rpm to about 1.5 rpm. The laminated rotary filters 3g, 3h, 3m and 3n are examples of the "first laminated rotary filter" in the claims, and the laminated rotary filters 3a to 3f and 3i to 3l are patents. It is an example of the "2nd lamination | stacking rotary filter body" of a claim.

  The distance between the upper and lower stacked rotary filters 3i to 3n and the lower stacked rotary filters 3c to 3h in the vertical direction (Z direction) is from the undiluted solution supply port 4 side toward the solid discharge port 5 side Therefore, it is configured to be narrow. As a result, the volume of the object to be treated to which dehydration processing is applied is gradually reduced as going from the stock solution supply port 4 side to the solid discharge port 5 side. Thus, the laminated rotary filters 3a to 3f and 3i to 3l rotated at high speed and the laminated rotary filters 3g, 3h, 3m and 3n rotated at low speed, and the solid discharge port from the stock solution supply port 4 side An upper row of stacked rotary filters 3i to 3n and a lower row of stacked rotary filters 3c to 3h configured to be narrowed toward the 5 side, and a flapper 51 provided in a solid outlet 5 described later The pressure adjusting portion 52 is configured to retain the solid component of the object to be treated toward the solid discharge port 5 side, and to discharge the solid component of the object to be treated having a low water content. That is, the difference between the rotational speeds of the laminated rotary filters 3a to 3f and 3i to 3l on the upstream side and the laminated rotary filters 3g, 3h, 3m and 3n on the downstream side, and the upper and lower laminates toward the downstream side. The squeezing force applied to the object to be treated is gradually increased from the upstream side to the downstream side by the gradually narrowing of the distance between the rotary filters 3 and the flapper 51.

  The lower layers of stacked rotary filters 3a to 3h are arranged at predetermined intervals, and are configured to transport solid components by rotating in the same direction (clockwise in FIG. 1). ing. Further, the upper row of stacked rotary filters 3i to 3n are disposed at a predetermined interval, and rotate in the same direction (counterclockwise in FIG. 1) to transport the solid components. It is configured.

  Moreover, the liquid component of a to-be-processed object is filtered by the lamination | stacking rotary filter bodies 3a-3f and 3i-3l arrange | positioned at the undiluted | stock solution supply port 4 side. Specifically, the liquid component is filtered by gravity from the filtration grooves of the laminated rotary filters 3a to 3f. Thereby, the moisture content of the object to be treated is lowered. Further, the object to be treated is pressed from the vertical direction and dehydrated by the laminated rotary filters 3g, 3h, 3m and 3n arranged on the solid discharge port 5 side. As a result, the moisture content of the object to be treated is further reduced.

  As shown in FIG. 2 and FIG. 3, the motor 2 is provided at one end (Y1 direction side end) in the axial direction (Y direction) of the rotary shaft 31 of each of the plurality of laminated rotary filters 3 There is. The motor 2 is configured to rotationally drive the rotating shaft 31. Specifically, the motor 2 is configured to rotate the rotation shaft 31 of the laminated rotary filter 3 via the reduction gear 21. The reduction gear 21 decelerates the output of the motor 2 and transmits it to the rotating shaft 31 at a reduction ratio of about 1/1200, for example.

  The motor 2 is connected to an inverter 22 as shown in FIG. Further, the motor 2 is configured to be rotationally driven by the power supplied via the inverter 22. The inverter 22 is configured to convert the frequency, the current value, and the voltage value of the power supplied from the power supply 9. The inverter 22 is also configured to control the frequency of AC power supplied to the motor 2. Thereby, it is possible to control the number of rotations of the laminated rotary filter 3. Further, the inverter 22 can detect the supplied power value as the load degree. In addition, the control unit 8 is connected to the plurality of inverters 22. The controller 8 is configured to control the inverter 22 to supply the electric power from the power supply 9 to each motor 2. The inverter 22 is an example of the “load detection unit” in the claims.

  Further, as shown in FIG. 2, the motor 2 is provided in each of the laminated rotary filters 3g, 3h, 3m and 3n disposed on the solid discharge port 5 side. In addition, the motor 2 is provided one by one for each of the laminated rotary filters 3a to 3f, 3i and 3j disposed on the side of the stock solution supply port 4 and the motor 2 is provided to the laminated rotary filters 3k and 3l. Are provided one for each. Specifically, two stacked rotary filters 3 adjacent to each other in the X direction are rotationally driven by the chain 23 in conjunction.

  Further, as shown in FIG. 4, one inverter 22 is provided for each motor 2 for rotating the laminated rotary filters 3g, 3h, 3m and 3n arranged on the solid discharge port 5 side. . Further, a common inverter 22 is provided for each of the motors 2 for rotating the laminated rotary filters 3a to 3f and 3i to 3l arranged on the side of the stock solution supply port 4.

  The laminated rotary filter 3 includes a plurality of filter pieces stacked along the rotation axis 31, as shown in FIG.

  More specifically, as shown in FIGS. 5 and 6, the laminated rotary filter 3 includes a plurality of medium-diameter disc filter pieces 301, a plurality of small-diameter disc filter pieces 302, and a plurality of large-diameter disc filters. It contains three types of filter strips with strip 303. The medium diameter disc filter piece 301 is made of, for example, a resin material. The small diameter disc filter piece 302 and the large diameter disc filter piece 303 are made of, for example, a metal material.

  The medium diameter disc filter piece 301, the small diameter disc filter piece 302, and the large diameter disc filter piece 303 all have an annular shape. That is, the medium diameter disc filter piece 301, the small diameter disc filter piece 302 and the large diameter disc filter piece 303 all have the through hole 304 through which the rotating shaft 31 is inserted. The medium diameter disc filter piece 301, the small diameter disc filter piece 302 and the large diameter disc filter piece 303 are all fitted to the rotary shaft 31 through the through holes 304. Therefore, the medium diameter disc filter piece 301, the small diameter disc filter piece 302, and the large diameter disc filter piece 303 do not move substantially in the direction intersecting the axial direction (Y direction) of the rotation shaft 31. It is configured.

  The laminated rotary filter 3 has the medium diameter disc filter piece 301, the small diameter disc filter piece 302 and the large diameter disc filter piece in a state where the rotary shaft 31 is inserted into the through hole 304 so as to surround the rotary shaft 31. A multiplate structure 303 is alternately stacked in the Y direction. A plurality of medium-diameter disc filter pieces 301, small-diameter disc filter pieces 302 and large-diameter disc filter pieces 303 are provided in one laminated rotary filter 3, respectively.

  The plurality of medium-diameter disc filter pieces 301 are provided to be arranged at predetermined intervals in the Y direction. The laminated rotary filter 3 is configured by alternately arranging (laminating) a large diameter disc filter piece 303 and a small diameter disc filter piece 302 between a plurality of medium diameter disc filter pieces 301 arranged in the Y direction. ing. In short, the laminated rotary filter 3 has the medium diameter disc filter pieces 301, the large diameter disc filter pieces 303, the medium diameter disc filter pieces 301, and the small diameter disc filter pieces 302 in the Y direction. Are repeatedly arranged (stacked). Alternatively, the filter pieces may be repeatedly arranged (laminated) in the order of the medium diameter disc filter piece 301, the small diameter disc filter piece 302, the medium diameter disc filter piece 301, and the large diameter disc filter piece 303.

  The medium-diameter disc filter piece 301 is provided on a disc-shaped plate-like portion 301a, a plurality of (four) convex portions 301b provided on one surface of the plate-like portion 301a, and the other surface of the plate-like portion 301a. A plurality of (four) convex portions 301 c are provided.

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

  As shown in FIG. 7, the convex portion 301 c only slightly protrudes from the other surface of the plate-like portion 301 a, and in fact, is located substantially on the same plane as the other surface of the plate-like portion 301 a (Approximately flush). Further, the amount d2 of protrusion of the convex portion 301c from the other surface is extremely smaller than the amount d1 of protrusion of the convex portion 301b from the one surface (d1 >> d2). In each of the drawings, the protrusion amount d2 of the protrusion 301c is illustrated to be larger than the actual protrusion amount for convenience of description.

  The medium diameter disc filter piece 301 brings the convex part 301 b into contact with the convex part 301 c of the other medium diameter disc filter piece 301 adjacent to one side in the Y direction, and the convex part 301 c is made the other in the Y direction. It is laminated | stacked in the state which the convex part 301b of the other medium diameter disc filter piece 301 adjacent to the side was made to contact. Therefore, the plate-like portion 301a of the medium-diameter disk filter piece 301 is separated from the plate-like portion 301a of the other adjacent medium-diameter disk filter piece 301 by the gap (d1 + d2). That is, the plate-like portion 301a of the medium-diameter disc filter piece 301 is separated from the plate-like portions 301a of the other adjacent medium-diameter disc filter pieces 301 by the total of the protrusion amounts of the convex portion 301b and the convex portion 301c. ing.

  Also, between the two adjacent medium-diameter disc filter pieces 301 (plate-like portion 301a), a filtration groove S (see FIG. 8) of a gap (d1 + d2) is formed by the convex portion 301b and the convex portion 301c. .

  As shown in FIG. 6, the small diameter disc filter piece 302 generally has a disc shape. Further, the small diameter disc filter pieces 302 are arranged at equal pitch intervals in the circumferential direction, and have a plurality of (four) notched portions 302 a cut out from the outer edge toward the center of the small diameter disc filter pieces 302. ing. The plurality of notch portions 302 a are provided at positions overlapping with the convex portions 301 b and the convex portions 301 c of the medium-diameter disk filter piece 301 when viewed in the Y direction. Further, the notch portion 302a is configured to engage with the convex portion 301b. The small-diameter disc filter piece 302 is disposed between two adjacent medium-diameter disc filter pieces 301 (plate-like portion 301 a) in a state in which the notch portion 302 a is engaged with the convex portion 301 b of the medium-diameter disc filter piece 301. Is located in

  As shown in FIG. 8, the thickness d3 of the small diameter disc filter piece 302 is smaller than the gap (d1 + d2) between the two adjacent medium diameter disc filter pieces 301 (plate-like portions 301a). Therefore, between the adjacent two medium-diameter disk filter pieces 301 (plate-like portion 301a) and the small-diameter disk filter pieces 302, a filtrate water discharge groove G1 of a gap (d1 + d2-d3) is formed. .

  That is, in the portion of the filtration groove S between the two adjacent medium diameter disc filter pieces 301 excluding the small diameter disc filter piece 302, the filtrate water outflow groove G1 of the gap (d1 + d2-d3) is formed. For this reason, the small diameter disc filter piece 302 is configured to be capable of swinging within a swinging range α in the Y direction in which the filtering groove S is formed. In the solid-liquid separation device 100, the small diameter disc filter piece 302 swings with the rotation of the rotary shaft 31, and it rotates while rubbing the side surface of the medium diameter disc filter piece 301. Can be suppressed. That is, the solid-liquid separator 100 can self-clean the filtrate water outflow groove G1 (filtration groove S). Further, the filtrate water outflow groove G1 is configured to filter the object to be treated by passing the liquid component contained in the object to be treated.

  As shown in FIG. 6, the large diameter disc filter piece 303 has a disc shape. Further, the large diameter disc filter pieces 303 are disposed at positions separated by a predetermined distance from the center of the large diameter disc filter pieces 303, and a plurality of (four) penetrations disposed at equal pitch intervals in the circumferential direction It has a hole 303a. The plurality of through holes 303 a are provided at positions overlapping with the convex portions 301 b and the convex portions 301 c of the medium diameter disc filter piece 301 when viewed in the Y direction. The through hole 303 a is configured to be fitted to the convex portion 301 b and the convex portion 301 c of the medium diameter disc filter piece 301. Further, the large diameter disc filter piece 303 has two adjacent medium diameter disc filter pieces 301 (plate-like portions) in a state in which the convex portion 301 b of the medium diameter disc filter piece 301 is fitted in the through hole 303 a. 301a) are disposed between.

  As shown in FIG. 8, the thickness d4 of the large diameter disc filter piece 303 is smaller than the gap (d1 + d2) between the adjacent medium diameter disc filter pieces 301 (plate-like portion 301a). Therefore, between the adjacent two medium-diameter disk filter pieces 301 (plate-like portion 301a) and the large-diameter disk filter pieces 303, a filtrate water discharge groove G2 of a gap (d1 + d2-d4) is formed. There is.

  That is, in the portion of the filtration groove S between the two adjacent medium diameter disc filter pieces 301 except the large diameter disc filter piece 303, the filtrate water outflow groove G2 of the gap (d1 + d2-d4) is formed. For this reason, the large-diameter disk filter piece 303 is configured to be able to swing in a swing range β in the Y direction in which the filtration groove S is formed. In the solid-liquid separator 100, the large diameter disc filter piece 303 swings with the rotation of the rotary shaft 31 and rotates while rubbing the side surface of the medium diameter disc filter piece 301. The clogging of S) can be suppressed. That is, the solid-liquid separator 100 can self-clean the filtrate water outflow groove G2 (filtration groove S). Moreover, the filtrate water outflow groove G2 is configured to filter the object to be treated by passing the liquid component contained in the object to be treated.

  As shown in FIG. 5, the large diameter disc filter piece 303 of the laminated rotary filter 3 in the upper row (lower row) and the large diameter disc of the laminated rotary filter 3 in the other adjacent upper row (lower row) The filter pieces 303 are alternately arranged so as to overlap each other in the Y direction. That is, 2 of the large diameter disc filter pieces 303 of the laminated rotary filter body 3 of the upper row (lower row) sandwich the small diameter disc filter pieces 302 of the laminated rotary filter body 3 of another adjacent upper row (lower row). It is arranged to bite between two medium diameter disc filter pieces 301. Further, the medium diameter disc filter piece 301 of the laminated rotary filter body 3 in the upper row (lower row) and the medium diameter disc filter piece 301 of the adjacent other upper row (lower row) laminated rotary filter body 3 are In the Y direction, they are provided in substantially the same range (position).

  As shown in FIG. 1, the solid discharge port 5 is provided with a flapper 51 and a pressure adjustment unit 52. The flapper 51 is configured to exert pressure on solid components of the object to be treated by the solid-liquid separation device 100. The pressure adjustment unit 52 is configured to adjust the pressure exerted by the flapper 51.

  The water level sensor 7 is provided in the upper part inside the solid-liquid separation device 100. Further, the water level sensor 7 is provided above (in the Z1 direction) the laminated rotary filter 3 (3i) disposed in the uppermost stream of the upper row. The water level sensor 7 includes a sensor 71 and a sensor 72. The sensor 71 detects a low water level, and the sensor 72 detects a water level higher than the sensor 71.

  The control unit 8 is configured to control the number of revolutions of the motor 2 by controlling the inverter 22 as shown in FIG. 4. The control unit 8 includes a circuit board and is configured to perform control by hardware control.

  The inverter 22 can transmit information of drive power as a load degree to the control unit 8 when power of a frequency controlled by the control unit 8 is supplied to the motor 2. That is, the inverter 22 is configured to be able to detect the degree of load of the laminated rotary filter 3. Specifically, the inverter 22 transmits information on drive power to the control unit 8 based on a plurality of threshold values. The inverter 22 transmits information on drive power to the control unit 8 when the drive power (load degree) is equal to or higher than the first threshold. Further, the inverter 22 transmits information of drive power to the control unit 8 when the drive power (load degree) is equal to or greater than a second threshold which is larger than the first threshold. The first threshold and the second threshold can be set by the user. For example, the first threshold value is set to a driving power (loading degree) that is likely to be clogged by the solid component of the object if the processing proceeds as it is. In other words, the first threshold still has time to cause blockage, and by taking measures at this stage, it is set to drive power (load degree) that can prevent blockage in advance. Further, the second threshold value is set to drive power (loading degree) at which the solid component of the object to be treated is clogged and the possibility of breakage of the laminated rotary filter 3 to be rotated is increased.

  Here, in the present embodiment, the control unit 8 is configured to perform control to increase the number of rotations of the laminated rotary filter 3 when the load degree detected by the inverter 22 is equal to or greater than the first threshold value. There is. Specifically, the controller 8 controls the laminated rotary filters 3g, 3h, 3m and 3n during the normal operation of solid-liquid separation, and the rotation speed is smaller than that of the laminated rotary filters 3a to 3f and 3i to 3l. Perform control to rotate at. In addition, when the load degree of the laminated rotary filters 3g, 3h, 3m and 3n detected by the inverter 22 is equal to or more than the first threshold value, the control unit 8 sets the laminated rotary filters 3g, 3h, 3m and 3n. Control is performed to increase the rotational speed more than during normal operation.

  In addition, when the load degree of the laminated rotary filters 3g, 3h, 3m and 3n detected by the inverter 22 is equal to or more than the first threshold value, the control unit 8 sets the laminated rotary filters 3g, 3h, 3m and 3n. Control is performed such that the number of rotations is made approximately equal to the number of rotations of the laminated rotary filters 3a to 3f and 3i to 3l.

  In addition, the control unit 8 controls all stacked rotations when at least one of the loading degrees of the stacked rotary filters 3g, 3h, 3m and 3n detected by the inverter 22 is equal to or higher than the first threshold value. Control is performed to increase the rotational speeds of the filters 3g, 3h, 3m and 3n.

  In addition, the control unit 8 determines that at least one of the loading degrees of the stacked rotary filters 3g, 3h, 3m, and 3n is equal to or greater than the first threshold value, and all the stacked rotary filters 3g, 3h, 3m. When the load degrees of all of the plurality of laminated rotary filters 3g, 3h, 3m and 3n detected by the inverter 22 are less than the first threshold value, the laminated rotary filter 3g, It is configured to perform control to restore the rotational speeds of 3h, 3m and 3n.

  Further, when the load degree is equal to or more than the first threshold value and the rotation speed of the laminated rotary filter 3 is increased, the control unit 8 determines that the load degree detected by the inverter 22 is the first threshold value after a predetermined time has elapsed. In the case of less than, it is comprised so that control which reverses the rotation speed of the lamination | stacking rotary filter 3 may be performed. For example, the control unit 8 increases the number of revolutions of the laminated rotary filter 3 and after one minute, when the load degree detected by the inverter 22 is less than the first threshold value, It is comprised so that control which resets rotation speed may be performed.

  Further, when the load degree detected by the inverter 22 is equal to or more than the first threshold value, the control unit 8 performs control to increase the number of rotations of the laminated rotary filter 3 and to decrease the supply amount of the stock solution. It is configured.

  In addition, the control unit 8 is configured to perform control to stop the rotation of the laminated rotary filter when the load degree detected by the inverter 22 is equal to or higher than a second threshold that is larger than the first threshold. .

(Speed control process)
Next, with reference to FIG. 9, the rotation speed control processing by the control unit 8 will be described.

  In step S1 of FIG. 9, it is determined whether the load degree is equal to or greater than a first threshold. Specifically, it is determined whether or not at least one load degree of the stacked rotary filters 3g, 3h, 3m and 3n is equal to or greater than a first threshold value. If the load degree is less than the first threshold, the determination in step S1 is repeated. If the load degree is equal to or greater than the first threshold value, the process proceeds to step S2.

  In step S2, it is determined whether the load degree is equal to or greater than a second threshold. Specifically, it is determined whether or not at least one load degree among the laminated rotary filters 3g, 3h, 3m, and 3n is equal to or greater than a second threshold that is greater than the first threshold. If the load degree is less than the second threshold, the process proceeds to step S3. That is, if at least one load degree among the laminated rotary filters 3g, 3h, 3m and 3n is greater than or equal to the first threshold and less than the second threshold, the process proceeds to step S3. If the load degree is equal to or higher than the second threshold, the process proceeds to step S7.

  In step S3, the rotational speeds of the laminated rotary filters 3g, 3h, 3m and 3n are increased. Specifically, the number of rotations of the laminated rotary filters 3g, 3h, 3m and 3n is increased to be approximately equal to that of the laminated rotary filters 3a to 3f and 3i to 3l. Further, the supply amount of the stock solution supplied from the stock solution supply port 4 is reduced. In step S4, in a state where the rotational speeds of the laminated rotary filters 3g, 3h, 3m and 3n are increased, the process waits for a predetermined time. For example, it waits for 1 minute to pass while the rotational speed of the laminated rotary filters 3g, 3h, 3m and 3n is increased.

  In step S5, it is determined whether the load degree is less than the first threshold. Specifically, it is determined whether the load degree of all of the laminated rotary filters 3g, 3h, 3m and 3n is less than the first threshold value. If at least one load degree among the laminated rotary filters 3g, 3h, 3m and 3n is equal to or greater than the first threshold value, the determination in step S5 is repeated. If all the load degrees of the laminated rotary filters 3g, 3h, 3m and 3n are less than the first threshold value, the process proceeds to step S6.

  In step S6, the rotational speeds of the laminated rotary filters 3g, 3h, 3m and 3n are returned to the original. Further, the supply amount of the stock solution supplied from the stock solution supply port 4 is returned to the original. Thereafter, the process returns to step S1. When it is determined in step S2 that the load degree is equal to or higher than the second threshold value, the rotation of the laminated rotary filter bodies 3a to 3n is stopped in step S7. Also, the supply of the stock solution from the stock solution supply port 4 is stopped. Thereafter, the rotation speed control process is ended. In addition, at the stage where the processing of step S3 to step S5 is being performed, the second threshold value at which at least one load degree of the stacked rotary filters 3g, 3h, 3m and 3n is larger than the first threshold value If it is determined that the above is true, the process proceeds to step S7.

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

  In the present embodiment, as described above, when the load degree detected by the inverter 22 is equal to or higher than the first threshold value, the control unit 8 is provided to perform control to increase the number of rotations of the laminated rotary filter 3. As a result, when the transfer resistance increases due to the progress of the solid-liquid separation process and the degree of load increases, the number of rotations of the laminated rotary filter 3 can be increased, so that solid components of the object to be treated can be obtained. It can be discharged quickly. In addition, if the first threshold is set to a load degree that is likely to be clogged by the solid component of the object if the processing proceeds as it is, the solid component is obtained when the load degree is equal to or higher than the first threshold. Can be prevented in advance from being clogged by the solid components of the object to be treated. As a result, even when the load degree of the laminated rotary filter 3 is large, it is suppressed that the time required for the solid-liquid separation process becomes long, and the clogging by the solid component of the object is suppressed. The solid component of the low moisture content material to be treated can be discharged continuously. In addition, since the first threshold is drive power (loading degree) that is likely to be clogged by the solid component of the object if the processing proceeds as it is, the solid of the object at the first threshold is Since it is considered that the water content of the component is sufficiently lowered, when the load degree above the first threshold is detected, the number of revolutions of the laminated rotary filter 3 is increased to make the solid component of the object to be treated Even if the water is discharged quickly, the solid component of the low moisture content material can be discharged continuously. Immediately after increasing the number of revolutions of the laminated rotary filter 3, after a certain amount of solid component of the material to be treated having a low moisture content is discharged, solid component of the material to be treated having a slightly high moisture content can be discharged There is sex. However, since the time for detecting the load degree of the laminated rotary filter 3 is set as short as possible after increasing the number of rotations of the laminated rotary filter 3, the return to the normal operation can be completed as soon as possible. It is configured to be as short as possible the time during which the solid component of the material to be treated with a slightly high water content may be discharged.

  Further, in the present embodiment, as described above, the laminated rotary filters 3g, 3h, 3m and 3n disposed on the solid outlet 5 side and the laminates disposed on the undiluted solution feed port 4 side to which the undiluted solution is supplied. The rotary rotary bodies 3a to 3f and 3i to 3l are provided, and the control unit 8 controls the laminated rotary rotary bodies 3g to 3n during the normal operation of solid-liquid separation. When rotating at a rotation speed smaller than 3f and 3i to 3l and when the load degree of the laminated rotary filter 3g, 3h, 3m and 3n detected by the inverter 22 is equal to or more than the first threshold value, the laminated rotary filter Control is performed to increase the rotational speeds of 3g, 3h, 3m and 3n more than during normal operation. Thus, during normal operation of solid-liquid separation, the moisture of the object to be treated can be filtered by the laminated rotary filters 3a to 3f and 3i to 3l, and by the laminated rotary filters 3g, 3h, 3m and 3n It is possible to squeeze and dehydrate the material to which the water is filtered. In addition, when the load degree is equal to or more than the first threshold, the rotation speed of the laminated rotary filters 3g, 3h, 3m and 3n is made larger than that in the normal operation, so that the sufficiently dehydrated object can be rapidly It is possible to effectively prevent the clogging by the solid component of the dehydrated object to be treated.

  Further, in the present embodiment, as described above, when the load degree of the stacked rotary filters 3g, 3h, 3m and 3n detected by the inverter 22 by the controller 22 is equal to or more than the first threshold, the stacked rotation is Control is performed to make the rotational speeds of the filters 3g, 3h, 3m and 3n substantially equal to the rotational speeds of the laminated rotary filters 3a to 3f and 3i to 3l. Thereby, the rotational speeds of the laminated rotary filters 3g, 3h, 3m and 3n can be made as large as the rotational speeds of the laminated rotary filters 3a to 3f and 3i to 3l. The amounts of objects to be processed sent from the bodies 3a to 3f and 3i to 3l to the laminated rotary filters 3g, 3h, 3m and 3n, and the objects to be treated discharged from the laminated rotary filters 3g, 3h, 3m and 3n The difference with the amount of can be reduced. As a result, the solid components of the object to be treated can be prevented from being further compressed (dehydrated) in the laminated rotary filters 3g, 3h, 3m and 3n, and therefore clogging by the solid components of the object to be treated can be avoided. It can be effectively suppressed.

  Further, in the present embodiment, as described above, at least one of the load degrees of the plurality of stacked rotary filter bodies 3g, 3h, 3m and 3n detected by the inverter 22 is the first When the threshold value is exceeded, control is performed to increase the number of revolutions of all the laminated rotary filters 3g, 3h, 3m and 3n. As a result, even when the load is concentrated on some of the laminated rotary filters 3g, 3h, 3m and 3n, the rotational speed of all the laminated rotary filters 3g, 3h, 3m and 3n is increased. Since the solid components of the processed material can be discharged quickly, the load applied to the laminated rotary filters 3g, 3h, 3m and 3n can be quickly reduced.

  Further, in the present embodiment, as described above, at least one of the loading degrees of the plurality of stacked rotary filters 3g, 3h, 3m and 3n is greater than or equal to the first threshold value. When the rotational speeds of all the laminated rotary filters 3g, 3h, 3m and 3n are increased, all the load degrees of the plurality of laminated rotary filters 3g, 3h, 3m and 3n detected by the load detection unit are the first When it is less than the threshold value, control is performed to restore the rotational speeds of the laminated rotary filters 3g, 3h, 3m and 3n. Thereby, the rotational speeds of the laminated rotary filters 3g, 3h, 3m and 3n return to the original although the load degree of some laminated rotary filters 3g, 3h, 3m and 3n is large. You can prevent that.

  Further, in the present embodiment, as described above, when the control unit 8 sets the load degree to the first threshold value or more and increases the number of rotations of the laminated rotary filter, detection is performed by the inverter 22 after a predetermined time has elapsed. When the load degree is less than the first threshold value, control is performed to restore the rotational speed of the laminated rotary filter 3. As a result, it is possible to suppress the continuation of the operation in a state where the rotational speed of the laminated rotary filter 3 is increased, so suppressing discharge of the object to be treated in an insufficient state. Can.

  Further, in the present embodiment, as described above, when the load degree detected by the inverter 22 is equal to or greater than the second threshold value, which is greater than the first threshold value, the control unit 8 rotates the laminated rotary filter 3. Configure to perform control to stop. As a result, when the load degree becomes larger than the first threshold and becomes equal to or larger than the second threshold, the rotation of the laminated rotary filter 3 can be stopped, so the load degree becomes larger. It is possible that the rotary shaft 31 and each filter piece (the medium-diameter disc filter piece 301, the small-diameter disc filter piece 302, the large-diameter disc filter piece 303) are deformed due to the operation being continued in a steady state. It can be suppressed.

  Further, in the present embodiment, as described above, when the load degree detected by the inverter 22 is equal to or greater than the first threshold value, the control unit 8 increases the number of rotations of the laminated rotary filter 3 and Control is performed to reduce the supply amount. As a result, the amount of objects to be treated flowing into the laminated rotary filter 3 can be reduced, and the amount of objects to be treated discharged from the laminated rotary filter 3 can be increased. The amount of the processing object staying in the rotary filter 3 can be reduced. As a result, the transport resistance can be effectively reduced, so that the degree of load can be effectively reduced.

  Moreover, in the present embodiment, as described above, the filter pieces include the large diameter disk filter piece 303, the small diameter disk filter piece 302, and the medium diameter disk filter piece 301. A large diameter disk filter piece 303 or a small diameter disk filter piece 302 is arranged swingably between the adjacent medium diameter disk filter pieces 301. In order to form the filtering groove S between the adjacent medium-diameter disc filter pieces 301, the medium-diameter disc filter pieces 301 are provided with projections 301b and 301c that abut on the adjacent medium-diameter disc filter pieces 301. The large diameter disc filter piece 303 is disposed so as to enter into the filtration groove of the laminated rotary filter 3 adjacent to the solid component feeding direction. The medium diameter disc filter piece 301 is formed of resin. Thereby, it is possible to suppress clogging of the filtration groove S due to the swing of the large diameter disc filter piece 303 and the small diameter disc filter piece 302. Further, the weight of the laminated rotary filter body 3 can be reduced as compared with the case where the medium-diameter disc filter piece 301 is formed of metal. Thereby, even when the number of stacked filter pieces is increased to increase the size, it is possible to suppress an increase in load applied to the rotating shaft 31. Then, by combining the configuration of such a filter piece and the configuration of the solid-liquid separation device 100 according to the above-described one aspect, a solid-liquid separation device capable of suppressing an increase in load applied to the rotating shaft 31 In 100, it is possible to suppress clogging by the solid component of the object while suppressing an increase in time required for the solid-liquid separation process.

  Further, in the present embodiment, as described above, the power supply value of the inverter 22 that controls the frequency of the AC power supplied to the motor 2 is detected as the load degree. As a result, the degree of load can be detected using the power supply value detection unit generally provided in the inverter, so it is not necessary to provide a detection unit such as a sensor separately from the inverter 22. Thereby, an increase in the number of parts can be suppressed. Further, the load degree can be easily obtained by detecting the power supply value of the inverter 22.

(Modification)
It should be understood that the embodiments disclosed herein are illustrative and non-restrictive in every respect. The scope of the present invention is indicated not by the description of the embodiments described above but by the claims, and further includes all modifications (modifications) within the meaning and scope equivalent to the claims.

  For example, in the above embodiment, the control unit includes the circuit board, and the hardware configuration is used to perform control. However, the present invention is not limited to this. In the present invention, the control unit may include a processor such as a CPU, and the processor may be operated by software to perform control.

  In the above embodiment, the rotation speed of the laminated rotary filter is increased when the load degree is equal to or higher than the first threshold value, and the rotation speed of the laminated rotary filter is increased when the load degree is equal to or higher than the second threshold value. Although the example which performs control to stop H is shown, the present invention is not limited to this. In the present invention, the control unit is controlled to reversely rotate the laminated rotary filter when the load degree detected by the load detection unit is greater than the first threshold and equal to or greater than the third threshold which is smaller than the second threshold. May be configured to As a result, when the loading degree is equal to or higher than the third threshold value, which is greater than the first threshold value, the solid component of the object to be treated can be loosened by reverse rotation of the laminated rotary filter body. It is possible to facilitate the discharge of solid components.

  For example, the control unit may perform the rotational speed control process shown in FIG. In step S11 of FIG. 10, it is determined whether the load degree is equal to or greater than a first threshold. Specifically, it is determined whether or not at least one load degree of the stacked rotary filters 3g, 3h, 3m and 3n is equal to or greater than a first threshold value. If the load degree is less than the first threshold, the determination in step S11 is repeated. If the load degree is equal to or greater than the first threshold value, the process proceeds to step S12.

  In step S12, it is determined whether the load degree is equal to or greater than a third threshold which is greater than the first threshold and smaller than the second threshold. Specifically, it is determined whether at least one load degree among the laminated rotary filters 3g, 3h, 3m and 3n is equal to or higher than a third threshold value. If the load degree is less than the third threshold, the process proceeds to step S13. That is, if the load degrees of all of the laminated rotary filters 3g, 3h, 3m and 3n are less than the third threshold value, the process proceeds to step S13. If at least one load degree among the laminated rotary filters 3g, 3h, 3m and 3n is equal to or higher than the third threshold value, the process proceeds to step S17.

  In step S13, the number of rotations of the laminated rotary filter 3 is increased. Specifically, the number of rotations of the laminated rotary filters 3g, 3h, 3m and 3n is increased to be approximately equal to that of the laminated rotary filters 3a to 3f and 3i to 3l. Further, the supply amount of the stock solution supplied from the stock solution supply port 4 is reduced. In step S14, the process waits for a predetermined time while increasing the rotational speed of the laminated rotary filters 3g, 3h, 3m and 3n. For example, it waits for 1 minute to pass while the rotational speed of the laminated rotary filters 3g, 3h, 3m and 3n is increased.

  In step S15, it is determined whether the load degree is less than the first threshold. Specifically, it is determined whether the load degree of all of the laminated rotary filters 3g, 3h, 3m and 3n is less than the first threshold value. If at least one load degree among the laminated rotary filters 3g, 3h, 3m and 3n is equal to or greater than the first threshold value, the determination in step S15 is repeated. If all the load degrees of the laminated rotary filters 3g, 3h, 3m and 3n are less than the first threshold value, the process proceeds to step S16.

  In step S16, the rotational speeds of the laminated rotary filters 3g, 3h, 3m and 3n are returned to the original. Further, the supply amount of the stock solution supplied from the stock solution supply port 4 is returned to the original. Thereafter, the process returns to step S11. In addition, at the stage where the processing in step S13 to step S15 is performed, the second threshold value in which at least one load degree among the stacked rotary filter bodies 3g, 3h, 3m and 3n is larger than the first threshold value If it is determined that the above is true, the process proceeds to step S21.

  When it is determined in step S12 that the load degree is equal to or higher than the third threshold, it is determined in step S17 whether the load degree is equal to or higher than a second threshold that is larger than the first threshold. Specifically, it is determined whether or not at least one load degree of the laminated rotary filters 3g, 3h, 3m and 3n is equal to or greater than a second threshold value. If the load degree is less than the second threshold, the process proceeds to step S18. That is, if the load degrees of all of the laminated rotary filters 3g, 3h, 3m and 3n are less than the second threshold value, the process proceeds to step S18. Further, if at least one load degree among the laminated rotary filters 3g, 3h, 3m and 3n is equal to or higher than the second threshold value, the process proceeds to step S21.

  In step S18, the laminated rotary filters 3a to 3n are reversely rotated. That is, all the laminated rotary filters 3 are reversely rotated. Specifically, the laminated rotary filter body 3 is reversely rotated for a predetermined time, and thereafter, the laminated rotary filter body 3 is repeatedly rotated forward for a predetermined time a predetermined number of times. For example, the laminated rotary filter 3 is rotationally driven by switching between reverse rotation and forward rotation every 10 seconds. Although the predetermined number of times of repeating the reverse rotation and the forward rotation varies depending on the properties of the object to be treated, it is approximately 2 to 3 times. At the time of reverse rotation and forward rotation, it is desirable to increase the number of rotations of the laminated rotary filters 3g, 3h, 3m and 3n to be substantially equal to that of the laminated rotary filters 3a to 3f and 3i to 3l. . However, the rotational speeds of the laminated rotary filters 3g, 3h, 3m and 3n in the forward rotation may be set to low speed rotation as in normal operation. In addition, the rotational speeds of the laminated rotary filters 3g, 3h, 3m and 3n in the reverse rotation may be set as low as that in the normal operation. Further, the supply amount of the stock solution supplied from the stock solution supply port 4 is reduced. In the forward rotation, the object to be treated is sent from the undiluted solution supply port 4 side to the solid discharge port 5 side. Moreover, in reverse rotation, a to-be-processed object is sent to the undiluted | stock solution supply port 4 side from the solid discharge port 5 side. Thereafter, the process proceeds to step S19.

  In step S19, it is determined whether the load degree is less than a third threshold. Specifically, it is determined whether the load degree of all of the laminated rotary filters 3g, 3h, 3m and 3n is less than the third threshold value. If at least one load degree among the laminated rotary filters 3g, 3h, 3m and 3n is equal to or higher than the third threshold value, the determination in step S19 is repeated. If all the load degrees of the laminated rotary filters 3g, 3h, 3m and 3n are less than the third threshold value, the process proceeds to step S20.

  In step S20, the rotational direction of the laminated rotary filters 3a to 3n is returned to the original. That is, the laminated rotary filters 3a to 3n are forwardly rotated. Thereafter, the process returns to step S11. That is, at least one load degree of the laminated rotary filters 3g, 3h, 3m and 3n is equal to or higher than the third threshold value, and the laminated rotary filter 3 is alternately driven in reverse rotation and forward rotation. In this case, after the rotational direction is returned to the original state, it is determined in step S11 whether the load degree has become smaller than the first threshold value. If the load degree is equal to or higher than the first threshold value, the process proceeds to step S13 through step S12, and the rotation speed of the laminated rotary filter 3 is increased. On the other hand, when the load degree is less than the first threshold, the determination of step S11 is repeated. That is, the normal operation is returned, and the rotational speeds of the laminated rotary filters 3a to 3n are returned to the original. Further, the supply amount of the stock solution supplied from the stock solution supply port 4 is returned to the original. In addition, at the stage where the processing of step S13 to step S15 and step S18 to step S19 is performed, at least one load degree of the laminated rotary filter bodies 3g, 3h, 3m and 3n is the third threshold. If it is determined that the second threshold value is greater than the value, the process proceeds to step S21.

  When it is determined in step S17 that the load degree is equal to or higher than the second threshold value, the rotation of the laminated rotary filter bodies 3a to 3n is stopped in step S21. Also, the supply of the stock solution from the stock solution supply port 4 is stopped. Thereafter, the rotation speed control process is ended.

  Further, in the present invention, the control unit is configured to perform control to reversely rotate the laminated rotary filter when the load degree detected by the load detection unit is equal to or more than a third threshold value smaller than the first threshold value. You may That is, when the load detection unit detects the load degree equal to or higher than the third threshold smaller than the first threshold, the control unit repeats reverse rotation and forward rotation every 10 seconds of the laminated rotary filter. Take control. The control unit performs control to increase the number of rotations of the laminated rotary filter when the degree of load is equal to or greater than the first threshold value, which is larger than the third threshold value.

  Moreover, although the example of the structure which detects a load degree with an inverter was shown in the said embodiment, this invention is not limited to this. In the present invention, the degree of load may be detected by means other than the inverter. For example, a sensor may be provided separately from the inverter to detect the current value to detect the degree of load. Alternatively, a torque sensor may be provided to detect the torque of the laminated rotary filter as the load degree. In addition, a strain sensor may be provided to detect strain of the rotation shaft or the like as the load degree. Further, a pressure sensor may be provided to detect the pressure of the object to be processed sent by the laminated rotary filter as the load degree.

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

  Moreover, in the said embodiment, although the example which formed the convex part in the one surface and the other surface of a medium diameter disc filter piece was shown, respectively, this invention is not limited to this. In the present invention, the convex portion may be formed on only one of the one surface and the other surface of the medium diameter disc filter piece.

  In the above embodiment, when the load degree is equal to or higher than the first threshold value and the rotational speed of the laminated rotary filter is increased, the load degree detected by the load detection unit after the predetermined time has elapsed is the first threshold value. In the case of less than, although the example of the structure which performs control which resets the rotation speed of a lamination | stacking rotary filter body was shown, this invention is not limited to this. In the present invention, when the load degree is equal to or more than the first threshold and the rotational speed of the laminated rotary filter is increased, the load degree detected by the load detection unit is smaller than the first threshold and less than the fourth threshold In such a case, control may be performed to restore the rotational speed of the laminated rotary filter.

  Moreover, although the example which arrange | positioned the motor only to one side of the axial direction of a rotating shaft was shown in the said embodiment, this invention is not limited to this. In the present invention, the motors may be alternately arranged on one side and the other side in the axial direction of the rotating shaft. Also, the motor may be disposed on both the one side and the other side in the axial direction of the rotating shaft.

  Moreover, although the example of the structure which rotationally drives a some 2nd laminated | stacked rotary rotor by a common motor was shown in the said embodiment, this invention is not limited to this. In the present invention, a motor may be provided to each of the second laminated rotary filters to drive them to rotate.

  Moreover, in the said embodiment, although the example of the structure which provides an inverter with respect to several 1st lamination | stacking rotary filtration bodies was shown, respectively, this invention is not limited to this. In the present invention, a common inverter may be provided for each of the plurality of first laminated rotating filters at a predetermined number.

  Moreover, in the said embodiment, although the example of the structure which provides a common inverter with respect to several 2nd lamination | stacking rotary filtration bodies was shown, this invention is not limited to this. In the present invention, an inverter may be provided for each of the plurality of second laminated rotary filters.

  In the above embodiment, when the load degree detected by the load detection unit is equal to or greater than the first threshold value, control is performed to increase the number of revolutions of the laminated rotary filter and to decrease the supply amount of the stock solution. Although an example is shown, the present invention is not limited to this. In the present invention, when the load degree detected by the load detection unit is equal to or higher than the first threshold value, control may be performed to stop the supply of the stock solution, or even if the supply amount of the stock solution is continued without changing it. Good.

  Further, in the present invention, when the load degree detected by the load detection unit is equal to or more than the first threshold value, the pressure adjustment unit is adjusted in the flapper opening direction to reduce the pressure acting on the object to be processed. It is also good.

  In the above embodiment, for convenience of explanation, the processing operation of the control unit has been described using a flow-driven flow chart in which processing is sequentially performed along the processing flow, but the present invention is not limited to this. In the present invention, the processing operation of the control unit may be performed by event-driven (event-driven) processing that executes processing on an event-by-event basis. In this case, the operation may be completely event driven, or the combination of event driving and flow driving may be performed.

2 motor 3 laminated rotary filter 3a, 3b, 3c, 3d, 3e, 3f, 3i, 3j, 3k, 3l laminated rotary filter (second laminated rotary filter)
3g, 3h, 3m, 3n stacked rotating filter (first stacked rotating filter)
4 Undiluted solution supply port 5 Solid outlet 8 Control section 22 Inverter (load detection section)
31 Rotary shaft 100 Solid-liquid separation device 301 Medium diameter disc filter piece (filter piece)
301b, 301c convex part 302 small diameter disc filter piece (filter piece)
303 Large diameter disc filter pieces
310 2nd rotary shaft S filter groove

Claims (10)

With the rotation axis,
A laminated rotary filter including a plurality of filter pieces stacked along the rotation axis, and a filter groove formed between the filter pieces;
A motor that rotationally drives the rotating shaft;
A load detection unit that detects a load degree of the laminated rotary filter;
A controller for controlling the number of rotations of the laminated rotary filter;
The solid-liquid separation device, wherein the control unit is configured to perform control to increase the number of rotations of the laminated rotary filter when the load degree detected by the load detection unit is equal to or higher than a first threshold value. . The stacked rotary filters are disposed in two rows in the upper and lower rows toward the solid outlet so as to send the solid component of the undiluted solution to be supplied to the solid outlet, and are disposed on the solid outlet side. A first laminated rotary filter body, and a second laminated rotary filter body disposed on the side of a stock solution supply port to which the stock solution is supplied,
The control unit rotates the first laminated rotary filter at a rotation speed smaller than that of the second laminated rotary filter during the normal operation of solid-liquid separation and detects the load detected by the load detector. When the load degree of the first laminated rotary filter is equal to or more than the first threshold value, control is performed to increase the number of revolutions of the first laminated rotary filter than during normal operation. The solid-liquid separator according to claim 1.   When the load degree of the first laminated rotary filter body detected by the load detection unit is equal to or more than the first threshold value, the control unit controls the number of rotations of the first laminated rotary filter body to the second laminated layer. The solid-liquid separation device according to claim 2, wherein the control is performed to make the rotational speed of the rotary filter substantially equal to that of the rotary filter. A plurality of first laminated rotary filters are provided,
The load detection unit is provided to each of the plurality of first laminated rotary filters,
The control unit is configured to perform all of the first laminations when at least one load degree of the load degrees of the plurality of first laminated rotary filters detected by the load detection unit is equal to or more than the first threshold. The solid-liquid separation device according to claim 2 or 3, wherein the control is performed to increase the number of rotations of the second rotary filter.   The control unit is configured to increase the number of rotations of all the first laminated rotary filters so that at least one of the load degrees of the plurality of first laminated rotary filters is greater than or equal to the first threshold. In the case where the load detection unit detects that the load degrees of all of the plurality of first laminated rotary filters detected by the load detection unit are less than the first threshold value, the number of rotations of the first laminated rotary filter is used as the original. The solid-liquid separation device according to claim 4, which is configured to perform control to return to.   When the load degree is equal to or more than the first threshold value and the rotation speed of the laminated rotary filter is increased, the control unit causes the load degree detected by the load detection unit to be the first value after a predetermined time has elapsed. The solid-liquid separation device according to any one of claims 1 to 5, wherein control is performed to restore the rotational speed of the laminated rotary filter when the number is less than the threshold value.   The control unit is configured to perform control to stop the rotation of the laminated rotary filter when the degree of load detected by the load detection unit is equal to or greater than a second threshold value that is greater than the first threshold value. The solid-liquid separator according to any one of claims 1 to 6, wherein   The control unit performs control to increase the number of revolutions of the laminated rotary filter and to decrease the supply amount of the stock solution when the load degree detected by the load detection unit is equal to or higher than the first threshold value. The solid-liquid separator according to any one of claims 1 to 7, wherein The filter piece includes a large diameter disc filter piece, a small diameter disc filter piece, and a medium diameter disc filter piece,
Between the adjacent medium-diameter disc filter pieces, the large-diameter disc filter piece or the small-diameter disc filter piece is disposed so as to be able to swing.
The medium diameter disc filter piece has a convex portion that abuts on the adjacent medium diameter disc filter piece to form the filtration groove between the adjacent medium diameter disc filter pieces,
The large-diameter disk filter pieces are disposed so as to enter the filtration grooves of the laminated rotary filter adjacent to the solid component feeding direction,
The solid-liquid separation device according to any one of claims 1 to 8, wherein the medium diameter disc filter piece is formed of a resin.   10. The solid-state imaging device according to claim 1, wherein the load detection unit is configured to detect, as a load degree, a supply power value of an inverter that controls a frequency of AC power supplied to the motor. Liquid separation device.

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