Filter type concentrator

Abstract

To provide a filter-type concentrator capable of adjusting a concentration of a target object after concentration (after separation).SOLUTION: A filter-type concentrator 100 includes: a housing 1 into which a target object P is loaded; a filter 2 arranged inside the housing 1 in an inclined position and filtering the target object P; and an angle adjustment mechanism 3 capable of changing an inclination angle θ of the filter 2.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a filter-type concentrator, and more particularly to a filter-type concentrator equipped with a filter for filtering a material to be treated. [Background technology]

[0002] BACKGROUND ART Conventionally, a filter type concentrator equipped with a filter for filtering a material to be treated is known (see, for example, Patent Document 1).

[0003] The above-mentioned Patent Document 1 discloses a solid-liquid separation device including a separation unit having a filter for filtering the material to be treated and a tray for supporting the filter. The filter is arranged at an angle. The separation unit of Patent Document 1 is configured so that the material to be treated is introduced onto the filter, thereby separating the material into a liquid that passes through the filter and a solid that slides down the filter. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 2018-138284 Summary of the Invention [Problem to be solved by the invention]

[0005] Here, the separation unit of Patent Document 1 simply separates solids and liquids by passing the liquid through an inclined filter, and has the problem that it is not possible to adjust the concentration of the material to be treated after concentration (after separation).

[0006] This invention has been made to solve the above-mentioned problems, and one object of this invention is to provide a filter-type concentrator that is capable of adjusting the concentration of the material to be treated after concentration (separation).

[0007] In order to achieve the above object, a filter-type concentrator according to a first aspect of the present invention comprises a housing into which a material to be treated is introduced, a filter disposed in an inclined state inside the housing and filtering the material to be treated, and an angle adjustment mechanism capable of changing the inclination angle of the filter; a sludge input section that is detachable from the housing, that is inclined downward so that the filter side is lower, and that has an inclined surface that allows the material to be treated to flow into the filter; Equipped with The sludge input section is configured to be movable horizontally. .

[0008] As described above, the filter-type concentrator according to the first aspect of the present invention includes a filter for filtering the material to be treated and an angle adjustment mechanism for changing the filter's inclination angle. By reducing the inclination angle, the force exerted by gravity on the material to be treated along the filter can be reduced, thereby lengthening the time the material takes to pass over the filter and increasing the filtration rate (the amount of liquid removed from the material). This increases the proportion of solids in the material, and the concentration of the material, or the proportion of solids in the material, becomes higher (concentrated) compared to before filtration. Furthermore, by increasing the inclination angle, the force exerted by gravity on the material to be treated along the filter can be increased, thereby shortening the time the material takes to pass over the filter, thereby reducing the filtration rate compared to when the inclination angle is small. This reduces the amount of water removed from the material to be treated, thereby reducing the concentration of the material compared to when the inclination angle is small. As a result, the concentration of the material after concentration (separation) can be adjusted.

[0009] In the filter-type concentrator according to the first aspect of the present invention, the angle adjustment mechanism preferably includes a pivot shaft that rotatably supports the filter. With this configuration, the inclination angle of the filter can be easily changed by rotating the filter about the pivot shaft.

[0010] In this case, the angle adjustment mechanism preferably includes a filter holding member provided in the housing, which rotates about a rotation center axis to change the tilt angle of the filter and holds the filter at the changed tilt angle, and a holding member attachment portion provided in the housing for attaching the filter holding member to the housing. With this configuration, the filter holding member and the holding member attachment portion can adjust the tilt angle of the filter relative to the housing and hold the filter at a predetermined angle relative to the housing.

[0011] In the filter-type concentrator according to the first aspect, the holder mounting portion preferably has a plurality of holder mounting holes arranged in an arc shape around the rotation central axis. With this configuration, the filter can be rotated around the rotation central axis by changing the positions at which the filter holders are attached to the plurality of holder mounting holes arranged in an arc shape around the rotation central axis, making it even easier to change the tilt angle of the filter.

[0012] In the filter-type concentrator according to the first aspect, the housing preferably includes a sludge discharge section disposed below the housing for discharging sludge, which is the filtered material to be treated, and the rotation axis is disposed on the sludge discharge section side of the filter. With this configuration, it is possible to prevent the lower end of the filter from moving significantly away from the sludge discharge section disposed below the filter when the filter is rotated.

[0013] In the filter-type concentrator according to the first aspect, preferably, The sludge input section The sludge inlet section is configured to change the direction of the material flowing into the housing toward the filter, and the mounting position of the filter on the housing can be changed according to the change in the inclination angle of the filter. With this configuration, the mounting position of the sludge inlet section can be changed according to the change in the inclination angle of the filter, so that the position of the filter to which the material is supplied as the filter rotates can be prevented from changing significantly.

[0014] In this case, the housing preferably further includes a plurality of sludge inlet mounting holes aligned in the rotation direction of the filter, for fixing the sludge inlet to the housing. With this configuration, the position of the sludge inlet can be easily adjusted by adjusting the position of the sludge inlet mounting holes to which the sludge inlet is fixed.

[0015] The filter-type concentrator according to the above aspect preferably includes a flow meter that measures the amount of filtrate discharged through the filter, and a control unit that is configured to determine whether the filter is clogged based on the amount of filtrate discharged detected by the flow meter. With this configuration, the control unit determines that the filter is clogged, and then notifies the user of the clogged filter, allowing the user to take action to clear the clog, such as by cleaning the filter.

[0016] In this case, the control unit is preferably configured to control cleaning of the filter when it is determined that the filter is clogged. With this configuration, when the filter is clogged, the control unit automatically cleans the filter, so that the filter clog can be quickly resolved.

[0017] In the filter-type concentrator according to the first aspect, preferably, a flow meter that measures the amount of filtrate discharged through the filter; and a control unit that is configured to determine whether the filter is clogged based on the amount of filtrate discharged detected by the flow meter, The angle adjustment mechanism further includes a drive source that rotates the filter around the rotation center axis and a rotating member that abuts against the filter, and the control unit is configured to rotate the filter using the rotating member to adjust the tilt angle of the filter when it is determined that the filter is clogged. With this configuration, the control unit automatically increases the tilt angle of the filter, thereby increasing the speed at which the material passes over the filter, thereby speeding up the concentration process. Furthermore, the control unit automatically decreases the tilt angle of the filter, thereby slowing the speed at which the material passes over the filter, thereby increasing the time for concentration process and enabling sufficient filtration even in a clogged state.

[0018] In the filter-type concentrator according to the first aspect, the filter preferably includes a wedge wire. By using a wedge wire that has better dewatering properties and is less prone to clogging than other filters, the concentration of the material to be treated can be increased and the number of cleaning cycles can be reduced. Furthermore, because the wedge wire is easier to clean than other filters, even if the filter does clog, the clog can be easily cleared.

[0019] In the filter-type concentrator according to the first aspect, the main body of the filter-type concentrator is preferably installed upstream of the dehydrator, with the discharge outlet for the material being located above the inlet for the material being treated of the dehydrator, and configured to supply the concentrated material to the dehydrator from the discharge outlet through the inlet for the material being treated. With this configuration, the material being concentrated in the filter-type concentrator can be supplied to the dehydrator by dropping it into the inlet for the material being treated of the dehydrator. Furthermore, by installing the filter-type concentrator upstream of the dehydrator, the concentration process and dehydration process can be performed as a series of processes, allowing the material to be dehydrated efficiently.

[0020] A filter-type concentrator according to a second aspect of the present invention comprises a frame body arranged in an inclined state and into which the material to be treated is introduced, a filter arranged inside the frame body and filtering the material to be treated, and an angle adjustment mechanism including a rotation center shaft that rotatably supports the frame body and that can change the tilt angle of the filter together with the frame body, wherein the angle adjustment mechanism includes a rotation part that is provided on the rear side of the frame body opposite to the inlet through which the material to be treated is introduced, extends from the frame body to the rear side, and is rotatable in the vertical direction, and a rotation part holding member that is attached to the lower side of the frame body via the rotation center shaft, extends from the frame body toward the rear side, and is provided with a plurality of grooves or a plurality of notches for holding the rotation part, and is configured so that the tilt angle of the filter together with the frame body can be changed depending on the position of the rotation part holding member that holds the rotation part, The frame has an inlet through which the material to be treated is introduced, and the inlet is disposed on the opposite side of the filter from the angle adjustment mechanism, and is disposed on the surface of the filter through which the material to be treated flows. .

[0021] In the filter-type concentrator according to the second aspect of the present invention, as described above, the angle adjustment mechanism includes a pivoting unit provided on the rear side of the frame opposite the inlet through which the material is introduced, extending from the frame toward the rear side and rotatable in the vertical direction, and a pivoting unit holder attached to the lower side of the frame via a pivot axis, extending from the frame toward the rear side, and having multiple grooves or notches for holding the pivoting unit. The tilt angle of the filter, along with the frame, is changed depending on the position of the pivoting unit holder that holds the pivoting unit. Because the pivoting unit and the pivoting unit holder are located outside the frame, the user can rotate the pivoting unit while checking the tilt angles of the frame and filter to any desired tilt angle. Furthermore, reducing the tilt angle reduces the force exerted by gravity on the material along the filter, thereby lengthening the time the material takes to pass over the filter and increasing the filtration rate (the amount of liquid removed from the material). This increases the proportion of solids in the entire material, and the concentration of the material, which is the proportion of solids in the entire material, becomes higher (concentrated) compared to before filtration. Furthermore, by increasing the inclination angle, the force with which the material is pushed along the filter by gravity can be increased, shortening the time it takes for the material to pass over the filter and reducing the amount of filtration compared to when the inclination angle is small. This reduces the amount of water removed from the material, making it possible to reduce the concentration of the material compared to when the inclination angle is small. As a result, the concentration of the material after concentration (separation) can be adjusted. [Effects of the Invention]

[0022] According to the present invention, as described above, it is possible to provide a filter type concentrator that is capable of adjusting the concentration of the material to be treated after concentration (after separation). [Brief explanation of the drawings]

[0023] [Figure 1]1 is a diagram showing a system for treating an object to be treated using a filter-type concentrator according to a first embodiment. [Figure 2] 1 is a diagram showing a filter-type concentrator according to a first embodiment. FIG. [Figure 3] 3 is a cross-sectional view of the filter-type concentrator of FIG. 2 taken along line 90-90. [Figure 4] FIG. 4A is a plan view of a wedge wire according to a first embodiment, and FIG. 4B is a cross-sectional view taken along line 80-80 in FIG. 4A. [Figure 5] 1A and 1B are views showing a filter holding member according to a first embodiment. [Figure 6] 6A is a perspective view showing a filter held by a filter holding member according to the first embodiment, and FIG. 6B is a view taken along line 70-70 in FIG. 6A. [Figure 7] FIG. 7A is a perspective view of the sludge input section, and FIG. 7B is a side view of the sludge input section. [Figure 8] FIG. 10 is a diagram for explaining the flow of material to be treated introduced into a sludge introduction section. [Figure 9] 10A and 10B are diagrams for explaining adjustment of the tilt angle of a filter. [Figure 10] 1 is a graph showing the relationship between the inclination angle of the filter, the concentrated sludge concentration, and the filtration amount. [Figure 11] FIG. 10 is a schematic diagram of a filter-type concentrator according to a second embodiment. [Figure 12] FIG. 10 is a view showing a rotating member according to a second embodiment. [Figure 13] FIG. 10 is a perspective view of a filter-type concentrator according to a third embodiment, as viewed from the front side. [Figure 14] FIG. 10 is a perspective view of a filter-type concentrator according to a third embodiment, as viewed from the rear side. [Figure 15] FIG. 2 is a diagram for explaining the flow of the workpiece. [Figure 16] 10A and 10B are diagrams showing a rotary member according to a modified example. DETAILED DESCRIPTION OF THE INVENTION

[0024] [First embodiment] (Configuration of filter type concentrator) A filter-type concentrator 100 according to a first embodiment will be described with reference to FIGS.

[0025] As shown in FIG. 1, the filter-type concentrator 100 (the main body of the filter-type concentrator 100) is installed upstream of the dehydrator 120. The filter-type concentrator 100 is used to concentrate the material P to be treated in advance to reduce the water content before the material P is dehydrated in the dehydrator 120. The material P to be treated is, for example, sludge. The main body of the filter-type concentrator 100 refers to the portion excluding accessories such as piping attached to the housing 1 of the filter-type concentrator 100. By concentrating the material P to be treated, the filter-type concentrator 100 reduces the load on the operation of the dehydrator 120 and reduces the mass of waste, thereby contributing to energy conservation and the achievement of the SDGs (Sustainable Development Goals).

[0026] In the filter-type concentrator 100, the sludge discharge section 4 for the material P to be treated is located above the material inlet 20 of the dehydrator 120. The filter-type concentrator 100 supplies the concentrated material P to the dehydrator 120 from the sludge discharge section 4 through the material inlet 20 of the dehydrator 120. The dehydrator 120 may be a multi-disk dehydrator or a screw dehydrator. Pipes may be connected between the filter-type concentrator 100 and the dehydrator 120. The sludge discharge section 4 is an example of the "material outlet" recited in the claims. The water separated from the filter-type concentrator 100 and the water separated by the dehydrator 120 are discharged into a drainage tank 150. The treated water discharged into the drainage tank 150 is treated, for example, by chemical treatment (e.g., chemical treatment, ozone treatment, etc.).

[0027] The filter-type concentrator 100 is supplied with the material P to be treated that has been flocculated in the flocculation mixing tank 130. The flocculation mixing tank 130 is a tank to which the material P to be treated is supplied from the material tank 140, and which flocculates the sludge by adding and mixing chemicals (polymer flocculant and inorganic flocculant).

[0028] (Configuration of filter type concentrator) As shown in FIG. 2, the filter-type concentrator 100 has a shape that combines a rectangular parallelepiped housing 1 and a sludge discharge unit 4 that tapers downward. As shown in FIG. 3, the filter-type concentrator 100 includes the housing 1, a filter 2, an angle adjustment mechanism 3, a sludge discharge unit 4, a sludge input unit 5, a control unit 6, and a flow meter 7. In this specification, the vertical direction is defined as the Z direction. The direction connecting the front side (the side where the sludge discharge unit 4 is arranged relative to the filter 2) and the back side, which is perpendicular to the Z direction, (depth direction) is defined as the X direction. The left-right direction perpendicular to the Z direction and the X direction is defined as the Y direction.

[0029] The housing 1 has a sludge input section 5 attached to its upper end and a sludge discharge section 4 attached to its lower end. The side of the housing 1 includes a plurality of sludge input section mounting holes 11 arranged in the rotation direction of the filter 2, for fixing the sludge input section 5. The side of the housing 1 also has a holding member mounting hole 33a. The front of the housing 1 is also provided with an openable door 12 for checking the state of the filter 2 inside.

[0030] As shown in FIG. 3, a filter 2 and an angle adjustment mechanism 3 for adjusting the tilt angle θ of the filter 2 are arranged inside the housing 1.

[0031] The filter 2 is used to concentrate the material P to be treated. The filter 2 is placed in an inclined state within the housing 1. The inclined state refers to being inclined with respect to the bottom surface of the housing 1 (in the X direction). The material P to be treated supplied to the filter-type concentrator 100 is filtered by the filter 2, and the material P to be treated is concentrated. Specifically, the material P is filtered as it passes through the X1 side surface of the filter 2, as indicated by the solid arrow. The concentrated material P to be treated is discharged to the outside via the sludge discharge section 4. The filtrate is discharged to the X2 side (back side) of the filter 2, as indicated by the dashed arrow. The filtrate is discharged to the outside of the filter-type concentrator 100 via a pipe 40 provided at the bottom of the housing 1.

[0032] The filter 2 is configured to be washable. The control unit 6 controls the washing unit 13 to wash the filter 2 by spraying water from the front side of the filter 2. Washing may be performed at a predetermined timing (time interval), or when the control unit 6 determines that the filter 2 is clogged. The washing timing may be set by the user, or may be synchronized with the washing timing of the dehydrator 120 (see FIG. 1). If the washing timing is synchronized with the washing timing of the dehydrator 120, a washing valve may be shared, or may be provided separately. The washing unit 13 may be installed internally or inserted from the outside.

[0033] As shown in Fig. 4, the filter 2 is a wedge wire, which is made up of inverted triangular wires arranged at equal intervals.

[0034] 3, the angle adjustment mechanism 3 is configured to be able to change the tilt angle θ of the filter 2. The angle adjustment mechanism 3 includes a rotation center shaft 31 that rotatably supports the filter 2, a filter holding member 32, and a holding member attachment portion 33.

[0035] The pivot shaft 31 is configured to rotatably attach the filter holding member 32 to the housing 1. This allows the filter 2 to be rotatably supported via the filter holding member 32. The pivot shaft 31 is, for example, a shaft. The pivot shaft 31 is attached to holes on the Z2 side and the X1 side of the filter holding member 32.

[0036] The filter holding member 32 is provided in the housing 1. As shown in FIGS. 5 and 6, the filter holding member 32 is a pair of members to which the filter 2 is detachably attached. The filter holding member 32 has the same size as the filter 2 in the longitudinal direction (Z direction) and is disposed on a side of the filter 2. The filter 2 is fixed to the filter holding member 32 while being pressed by a fixing member 30 such as a bolt. The filter holding member 32 rotates around the rotation center axis to change the inclination angle θ of the filter 2 and holds the filter 2 at the changed inclination angle θ. Specifically, the filter holding member 32 rotates around the rotation center axis and is fixed to the housing 1 at a predetermined position via a holding member attachment portion 33, thereby changing the inclination angle θ of the filter 2. Note that FIG. 6(A) shows a simplified representation of the filter 2. The inclination angle θ is an angle of inclination with respect to a horizontal plane. In the first embodiment, it is an angle of inclination with respect to the bottom surface of the housing 1. A partition member 32b is attached to the X2 side of the Z2 side end of the filter holding member 32, preventing the filtrate from flowing into the sludge discharge section 4 along the surface (X2 side surface) of the filter 2 opposite to the surface to which the material P to be treated is supplied. One end of the partition member 32b is attached to the filter holding member 32, and the other end is attached to the housing 1. The partition member 32b is made of a material that can follow the rotation of the filter holding member 32, such as rubber.

[0037] 3, the holding member mounting portion 33 is provided on the housing 1 and is used to mount the filter holding member 32 to the housing 1. The holding member mounting portion 33 has a plurality of holding member mounting holes 33a arranged in an arc shape centered on the rotation central axis 31. The holding member mounting holes 33a and the mounting portion 32a of the filter holding member 32 are fixed in a aligned state. The fixing method is, for example, by using screws, bolts, etc.

[0038] As shown in FIG. 7, the sludge input unit 5 is configured to be detachable from the housing 1. Specifically, the sludge input unit 5 is fixed in a state in which the sludge input unit mounting hole 11 overlaps with the hole 53 on the side of the sludge input unit 5. The mounting position of the sludge input unit 5 on the housing 1 can be changed in accordance with a change in the tilt angle θ of the filter 2. Specifically, the mounting position of the sludge input unit 5 relative to the housing 1 can be changed by changing the position of the sludge input unit mounting hole 11 that fixes the sludge input unit 5 to the housing 1. Because the hole 53 is an elongated hole extending in the X direction, after the position of the sludge input unit mounting hole 11 has been determined, the position can be adjusted in the X direction.

[0039] The sludge input section 5 has an inclined surface 51 that slopes downward so that the filter 2 side is lower, and a wall portion 52 that surrounds the inclined surface 51 from the left and right (Y direction) and from the side opposite the filter 2 side (the direction from X1 to X2). Specifically, the inclined surface 51 is the bottom surface, and the wall portion 52 is the both side surfaces and the back surface. As shown by the arrows, when the material P to be treated is supplied toward the wall portion 52, the material P flows downward along the inclined surface 51 in a radially spreading state. As a result, the material P is supplied near the upper end of the filter 2 and also radially spreads from the upper end to the lower end of the filter 2, allowing the material P to be supplied over a wide range in the width direction (Y direction) of the filter 2.

[0040] 8, the sludge input section 5 is configured to be able to change the direction of the material P flowing into the housing 1 toward the filter 2. The material P is filtered as it passes through the filter 2 and is discharged to the outside via the sludge discharge section 4.

[0041] The control unit 6 controls the operation of the filter-type concentrator main body. The control unit 6 includes a CPU (Central Processing Unit) and memory. The control unit 6 is configured to determine whether the filter 2 is clogged based on the difference between the amount of material P fed into the housing 1 and the amount of filtrate discharged detected by the flow meter 7.

[0042] Furthermore, the control unit 6 is configured to perform control to start cleaning of the filter 2 based on the determination that clogging has occurred in the filter 2. Specifically, in addition to the motor-operated valve for cleaning the dehydrator main body, a motor-operated valve for cleaning the filter 2 of the filter-type concentrator 200 is provided, and the control unit 6 adjusts the on state (open state) and off state (closed state) of the motor-operated valve to clean the filter 2.

[0043] The flow meter 7 measures the discharge amount of the filtrate filtered by the filter 2. The flow meter 7 is provided in a pipe 40 through which the filtrate flows.

[0044] (Detection of blockage) The control unit 6 pre-stores the amount of filtrate discharge predicted from the tilt angle θ of the filter 2, the amount of material P introduced into the housing 1, and the type of material P. The control unit 6 acquires the flow rate measurement results from the flow meter 7 and compares the amount of filtrate discharge detected by the flow meter 7 with the expected amount of filtrate discharge. Specifically, if the difference between the amount of filtrate discharge predicted from the amount of material P introduced into the housing 1 minus the amount of filtrate discharge detected by the flow meter 7 is within a predetermined range (the same or within an error range), it is determined that the filter 2 is not clogged. On the other hand, if the difference between the amount of filtrate discharge predicted from the amount of material P introduced into the housing 1 minus the amount of filtrate discharge detected by the flow meter 7 is large, it can be said that the amount of filtrate is small, and therefore it is determined that the filter 2 is clogged. In this case, the control unit 6 may be configured to perform control to notify an error. It should be noted that the difference obtained by subtracting the amount of filtrate discharged detected by the flow meter 7 from the amount of filtrate discharged predicted from the amount of material P put into the housing 1 may be a negative value if more filtrate is discharged than expected. In this case, it is considered that the difference falls within the error range, but if it exceeds the error range, it is considered that some kind of error other than clogging of the filter 2 has occurred. In this case, the control unit 6 may be configured to perform control to notify of the error.

[0045] (Change of tilt angle) The change in the inclination angle θ will be described with reference to FIG. 9. The inclination angle θ of the filter 2 is, for example, 30 degrees or more, preferably 50 degrees or more. The inclination angle θ of the filter 2 is set, for example, to 80 degrees or less. In FIG. 9, the force exerted by gravity toward the inclined surface is indicated by a dashed arrow, with the arrow length increasing as the force increases. In FIG. 9(B), where the inclination angle θ is larger than in FIG. 9(A), the force pushing the workpiece P along the inclined surface is greater than in FIG. 9(A). Therefore, as the inclination angle θ of the filter 2 increases, the force pushing the workpiece P downward along the inclined surface increases, causing the workpiece P to move faster across the surface of the filter 2. This shortens the time it takes for the workpiece P to pass over the surface of the filter 2, reducing the amount of filtration. As a result, the concentration of the workpiece P decreases. For example, when concentrating a workpiece P that is prone to clogging the filter 2, the inclination angle θ of the filter 2 is set larger than when concentrating a workpiece P that is less likely to clog the filter 2. On the other hand, in FIG. 9(A), where the inclination angle θ is smaller than in FIG. 9(B), the force pushing the workpiece P along the inclined surface is smaller than in FIG. 9(B). Therefore, as the inclination angle θ of the filter 2 becomes smaller, the force pushing the workpiece P downward along the inclined surface becomes smaller, and the workpiece P moves more slowly across the surface of the filter 2. As a result, the time it takes for the workpiece P to pass over the surface of the filter 2 becomes longer, and the amount of filtration increases. Therefore, when treating a workpiece P with a high moisture content, for example, if it is desired to increase the amount of filtration and increase the concentration of the workpiece P, the inclination angle θ of the filter 2 is set to be small.

[0046] The procedure for changing the inclination angle θ of the filter 2 will be described. The fixing member that fixes the holding member mounting hole 33a and the mounting portion 32a of the filter holding member 32 is removed. Then, the filter holding member 32 is rotated about the rotation center shaft 31 to change the inclination angle θ. After changing the inclination angle θ, the holding member mounting hole 33a and the mounting portion 32a of the filter holding member 32 are aligned and fixed with the fixing member. Furthermore, when changing the inclination angle θ of the filter 2, the position of the sludge input section 5 is changed. The fixed state between the sludge input section 5 and the housing 1 is released, and the sludge input section 5 is fixed in a position where the material to be treated P can be supplied to the filter 2, aligning the inclination angle θ with the position of the filter 2 after the change.

[0047] FIG. 10 is a graph showing the relationship between the inclination angle θ of the filter 2 and the concentrated sludge concentration and filtration volume. The concentration treatment was performed without clogging of the filter 2. The bar graph shows the filtration volume for each inclination angle θ of the filter 2, and the line graph shows the concentration of the filtered material P for each inclination angle θ of the filter 2. The horizontal axis of the graph plots the sludge supply volume per minute (l / min), and the vertical axis plots the concentrated sludge concentration (%) in the line graph and the filtration volume (l / min) in the bar graph. Furthermore, the TS (total solids), which is the weight ratio of the substances remaining when the material P is evaporated and solidified, was 1.0%, and the VTS (volatile total solids), which is the weight ratio of the amount of substances volatilized when the evaporation residue is heated at 600°C, was 96.4%.

[0048] When the inclination angle θ of Filter 2 was 55 degrees, if the sludge supply rate was 6.6 (l / min), the filtration rate was 5.4 (l / min) and the concentrated sludge concentration was 6.5 (%). When the inclination angle θ of Filter 2 was 55 degrees, if the sludge supply rate was 10.5 (l / min), the filtration rate was 8.2 (l / min) and the concentrated sludge concentration was 5.4%. When the inclination angle θ of Filter 2 was 55 degrees, if the sludge supply rate was 20.9 (l / min), the filtration rate was 16.2 (l / min) and the concentrated sludge concentration was 5.4%.

[0049] When the inclination angle θ of Filter 2 was 65 degrees, and the sludge supply rate was 6.6 (l / min), the filtration rate was 4.2 (l / min) and the concentrated sludge concentration was 3.7 (%). When the inclination angle θ of Filter 2 was 65 degrees, and the sludge supply rate was 10.5 (l / min), the filtration rate was 6.6 (l / min) and the concentrated sludge concentration was 3.7%. When the inclination angle θ of Filter 2 was 65 degrees, and the sludge supply rate was 20.9 (l / min), the filtration rate was 14.2 (l / min) and the concentrated sludge concentration was 3.8%.

[0050] When the inclination angle θ of Filter 2 was 75 degrees, if the sludge supply rate was 6.6 (l / min), the filtration rate was 4.0 (l / min) and the concentrated sludge concentration was 3.0 (%). When the inclination angle θ of Filter 2 was 75 degrees, if the sludge supply rate was 10.5 (l / min), the filtration rate was 7.2 (l / min) and the concentrated sludge concentration was 3.2%. When the inclination angle θ of Filter 2 was 75 degrees, if the sludge supply rate was 20.9 (l / min), the filtration rate was 13.8 (l / min) and the concentrated sludge concentration was 3.2%.

[0051] From the above results, it can be seen that if the inclination angle θ of the filter 2 is reduced, the filtration amount increases and the concentrated sludge concentration increases even if the supply amount of the material to be treated P is the same. It can also be seen that if the inclination angle θ of the filter 2 is the same, the filtration amount increases by increasing the sludge supply amount.

[0052] (Effects of the first embodiment) In the first embodiment, the following effects can be obtained.

[0053] In the first embodiment, as described above, the filter-type concentrator 100 includes a housing 1 into which the material P is introduced, a filter 2 disposed at an angle inside the housing 1 and filtering the material P, and an angle adjustment mechanism 3 capable of changing the inclination angle θ of the filter 2. By reducing the inclination angle θ, the force exerted by gravity on the material P along the filter 2 can be reduced, thereby lengthening the time the material P takes to pass over the filter 2 and increasing the filtration rate (the amount of liquid removed from the material P). This increases the proportion of solids in the material P as a whole, and the concentration of the material P, which is the proportion of solids in the material P as a whole, becomes higher (concentrated) than before filtration. Furthermore, by increasing the inclination angle θ, the force exerted by gravity on the material P along the filter 2 can be increased, thereby shortening the time the material P takes to pass over the filter 2, thereby reducing the filtration rate compared to when the inclination angle θ is small. This reduces the amount of moisture removed from the material P, thereby reducing the concentration of the material P compared to when the inclination angle θ is small. As a result, the concentration of the material P to be treated after concentration (after separation) can be adjusted.

[0054] In the first embodiment, as described above, the angle adjustment mechanism 3 includes the rotation center shaft 31 that rotatably supports the filter 2. This makes it possible to easily change the tilt angle θ of the filter 2 by rotating the filter 2 around the rotation center shaft 31.

[0055] In the first embodiment, as described above, the angle adjustment mechanism 3 is provided inside the housing 1, rotates around the rotation center axis to change the tilt angle θ of the filter 2, and includes a filter holding member 32 that holds the filter 2 at the changed tilt angle θ, and a holding member attachment portion 33 that is provided in the housing 1 and that attaches the filter holding member 32 to the housing 1. This makes it possible to adjust the tilt angle θ of the filter 2 relative to the housing 1 by the filter holding member 32 and the holding member attachment portion 33, and to hold the filter 2 at a predetermined angle.

[0056] In the first embodiment, as described above, the holding member mounting portion 33 has a plurality of holding member mounting holes 33a arranged in an arc shape around the rotation central axis 31. This allows the filter 2 to be rotated around the rotation central axis 31 by changing the position at which the filter holding member 32 is mounted in the plurality of holding member mounting holes 33a arranged in an arc shape around the rotation central axis 31, making it possible to change the tilt angle θ of the filter 2 even more easily.

[0057] In the first embodiment, as described above, the housing 1 includes the sludge discharge unit 4 that is disposed below the housing 1 and that discharges sludge, which is the filtered material to be treated P, and the rotation center shaft 31 is disposed on the sludge discharge unit 4 side of the filter 2. This allows the sludge discharge unit 4 to be disposed below the filter 2, and also prevents the lower end of the filter 2 from moving too far away from the sludge discharge unit 4 disposed below the filter 2 when the filter 2 is rotated.

[0058] As described above, the first embodiment further includes a sludge input unit 5 that is detachable from the housing 1, configured to change the inflow direction of the material P to be treated flowing into the housing 1 toward the filter 2, and whose mounting position on the housing 1 can be changed in accordance with changes in the inclination angle θ of the filter 2. This allows the mounting position of the sludge input unit 5 to be changed in accordance with changes in the inclination angle θ of the filter 2, thereby preventing a large change in the position of the filter 2 to which the material P to be treated is supplied as the filter 2 rotates.

[0059] In the first embodiment, as described above, the housing 1 is arranged to be aligned in the rotation direction of the filter 2 and further includes a plurality of sludge input unit mounting holes 11 for fixing the sludge input unit 5 to the housing 1. This makes it possible to easily adjust the position of the sludge input unit 5 by adjusting the position of the sludge input unit mounting holes 11 to which the sludge input unit 5 is fixed.

[0060] As described above, the first embodiment includes the flow meter 7 that measures the amount of filtrate discharged through the filter 2, and the control unit 6 that is configured to determine whether the filter 2 is clogged based on the amount of filtrate discharged detected by the flow meter 7. In this way, when the control unit 6 determines that the filter 2 is clogged, for example, the control unit 6 notifies the user of the clogged filter 2, allowing the user to take action to clear the clog, such as cleaning the filter 2.

[0061] In the first embodiment, as described above, the control unit 6 is configured to perform control to start cleaning of the filter 2 based on the determination that clogging has occurred in the filter 2. As a result, when clogging occurs in the filter 2, the control unit 6 automatically cleans the filter 2, so that the clogging of the filter 2 can be quickly resolved.

[0062] In the first embodiment, as described above, the filter 2 includes a wedge wire. This allows for better dewatering properties and less clogging than other filters 2, and by using a wedge wire, it is possible to increase the concentration of the material P to be treated and reduce the number of times it needs to be cleaned. Furthermore, because the wedge wire is easier to clean than other filters 2, even if the filter 2 does become clogged, the clog can be easily cleared.

[0063] In the first embodiment, as described above, the main body of the filter-type concentrator 100 is installed upstream of the dehydrator 120, the sludge discharge section 4 is located above the material inlet 20 of the dehydrator 120, and the concentrated material P is supplied from the sludge discharge section 4 to the dehydrator 120 via the material inlet 20. This allows the material P concentrated in the filter-type concentrator 100 to be supplied to the dehydrator 120 by dropping it into the material inlet 20 of the dehydrator 120. Furthermore, by installing the filter-type concentrator 100 upstream of the dehydrator 120, the concentration process and dehydration process can be performed as an integrated process, thereby enabling the material P to be dehydrated efficiently.

[0064] [Second embodiment] Next, a second embodiment of the present invention will be described with reference to Figures 11 and 12. Unlike the first embodiment, this second embodiment describes an example in which the control unit 6 controls the angle adjustment mechanism 3. Note that the same components as those in the first embodiment are denoted by the same reference numerals in the figures, and their description will be omitted.

[0065] As shown in FIG. 11 , in the second embodiment, the angle adjustment mechanism 3 includes a rotating member 34 and a drive source 34a that rotates the filter 2 around the rotation center axis. The rotating member 34 includes an abutment member 34b that abuts against the filter 2. The drive source 34a is a motor. The abutment member 34b is an electric cylinder. The electric cylinder is attached to the Z2-side surface of the filter holding member 32, and the filter holding member 32 rotates by extending and contracting the electric cylinder in the vertical direction (Z direction). This changes the inclination angle θ of the filter 2. The inclination angle θ is the angle of inclination with respect to the horizontal plane, and in the second embodiment, it is the angle of inclination with respect to the bottom surface of the housing 1.

[0066] The control unit 6 is configured to control the rotating member 34 to adjust the inclination angle θ of the filter 2. As the inclination angle θ increases, the material P passes through the filter 2 faster, resulting in a lower concentration and less clogging of the filter 2. On the other hand, as the inclination angle θ decreases, the material P passes through the filter 2 more slowly, resulting in a higher concentration and more easily clogging.

[0067] One example of the control by the control unit 6 to control the rotating member 34 to adjust the inclination angle θ of the filter 2 is control to adjust the inclination angle θ depending on the material P to be treated. For example, in the case of a material P that is prone to clogging, the control unit 6 controls the rotating member 34 to increase the inclination angle θ. Another example of the control by the control unit 6 to control the rotating member 34 to adjust the inclination angle θ of the filter 2 is to adjust the inclination angle θ depending on the dehydrator 120 attached downstream of the filter-type concentrator 200. For example, if sufficient concentration is desired in terms of the processing capacity or operating time of the dehydrator 120, the control unit 6 controls the rotating member 34 to decrease the inclination angle θ. Another example of the control by the control unit 6 to control the rotating member 34 to adjust the inclination angle θ of the filter 2 is to adjust the inclination angle θ to adjust the timing of cleaning. For example, if it is desired to reduce the number of cleanings, the control unit 6 controls the rotating member 34 to increase the inclination angle θ and make the filter less likely to clog. The filter-type concentrator 200 is configured so that the control unit 6 performs at least one of these controls.

[0068] When clogging of the filter 2 occurs, the control unit 6 controls the rotating member 34 to increase the inclination angle of the filter 2. This allows the material P to be quickly sent to the sludge discharge unit 4, thereby quickly carrying out the concentration treatment.

[0069] The other configurations of the second embodiment are the same as those of the first embodiment.

[0070] (Effects of the second embodiment) In the second embodiment, the following effects can be obtained.

[0071] In the second embodiment, as described above, the filter-type concentrator 200 includes a housing 1 into which the material P is introduced, a filter 2 disposed at an angle inside the housing 1 and filtering the material P, and an angle adjustment mechanism 3 capable of changing the inclination angle θ of the filter 2. By reducing the inclination angle θ, the force exerted by gravity on the material P along the filter 2 can be reduced, thereby lengthening the time the material P takes to pass over the filter 2 and increasing the filtration rate (the amount of liquid removed from the material P). This increases the proportion of solids in the material P as a whole, and the concentration of the material P, which is the proportion of solids in the material P as a whole, becomes higher (concentrated) than before filtration. Furthermore, by increasing the inclination angle θ, the force exerted by gravity on the material P along the filter 2 can be increased, thereby shortening the time the material P takes to pass over the filter 2, thereby reducing the filtration rate compared to when the inclination angle θ is small. This reduces the amount of water removed from the material P, thereby reducing the concentration of the material P compared to when the inclination angle θ is small. As a result, the concentration of the material P to be treated after concentration (after separation) can be adjusted.

[0072] Furthermore, in the second embodiment, as described above, the apparatus includes a flowmeter 7 that measures the discharge amount of filtrate filtered by the filter 2 and a control unit 6 that is configured to determine whether the filter 2 is clogged based on the discharge amount of filtrate detected by the flowmeter 7. The angle adjustment mechanism 3 further includes a drive source 34a that rotates the filter 2 about the rotation center axis and a rotating member 34 that abuts against the filter 2. When the control unit 6 determines that the filter 2 is clogged, the control unit 6 rotates the filter 2 using the rotating member 34 to adjust the inclination angle θ of the filter 2. As a result, when the control unit 6 automatically increases the inclination angle θ of the filter 2, the speed at which the material P passes over the filter 2 increases, thereby speeding up the concentration process. Furthermore, when the control unit 6 automatically decreases the inclination angle θ of the filter 2, the speed at which the material P passes over the filter 2 decreases, thereby increasing the time for the concentration process and enabling sufficient filtration even in a clogged state.

[0073] Other effects of the second embodiment are the same as those of the first embodiment.

[0074] [Third embodiment] Next, a third embodiment of the present invention will be described with reference to Figures 13 to 15. In this third embodiment, unlike the first embodiment, an example will be described in which the filter 2 is provided in the frame 10 rather than in the housing 1. Note that the same components as those in the first embodiment are denoted by the same reference numerals in the drawings, and their description will be omitted.

[0075] As shown in FIG. 13, a filter-type concentrator 300 according to the third embodiment of the present invention includes a frame 10, a filter 2, and an angle adjustment mechanism 3.

[0076] Unlike the housing 1, the frame 10 has an open front. A filter 2 is placed inside the frame 10. The frame 10 is placed in an inclined state, and by changing the inclination angle θ of the frame 10, the inclination angle θ of the filter 2 is changed. The concentrated material P to be treated is discharged from the front side (X1 side) of the frame 10 across the filter 2, and the filtrate is discharged from the back side (X2 side) of the filter 2.

[0077] An inlet 50, through which the material to be treated P is introduced, is attached to the top of the front side (X1 side) of the frame 10. An angle adjustment mechanism 3 is provided on the back side (X2 side) of the frame 10. The inlet 50 has a cylindrical shape.

[0078] 14, the angle adjustment mechanism 3 includes a rotating part 35 and a rotating part holding member 36. The rotating part 35 is provided on the rear side (X2 side) of the frame 10, opposite the inlet 50 through which the workpiece P is inserted. The rotating part 35 extends from the frame 10 to the rear side (X2 side) and is configured to be rotatable in the vertical direction. A shaft 35a is provided at the tip of the rotating part 35, extending in a direction (Y direction) perpendicular to the direction in which the rotating part holding member 36 extends.

[0079] The pivoting portion holding member 36 is attached to the lower side of the frame 10 via the pivot axis 31 and extends from the frame 10 toward the rear side (X2 side). The pivoting portion holding member 36 is provided with a plurality of notches 37 for holding the pivoting portion 35. The plurality of notches 37 of the pivoting portion holding member 36 open upward (toward the Z1 side) and are arranged at predetermined intervals. The inclination angle θ of the filter 2 as well as the frame 10 is changed by inserting the shaft 35a of the pivoting portion 35 into the notches 37. The pivoting portion holding member 36 is provided with a rotatable cover member 38 that covers the notches 37. The shaft 35a is fixed while sandwiched between the cover member 38 and the notch 37. The inclination angle θ can be reduced by changing the notch 37 into which the shaft 35a of the pivoting portion 35 is inserted to the notch 37 on the rear side (X2 side). In addition, the inclination angle θ can be increased by changing the notch 37 into which the shaft 35a of the rotating part 35 is inserted to the notch 37 on the front side (X1 side). In the third embodiment, the inclination angle θ is the inclination angle with respect to the horizontal plane.

[0080] As shown in FIG. 15, the material P to be treated introduced into the frame 10 is stored in a sludge storage section 18 that is provided within the frame 10 and has an arc-shaped cross section. The material P overflows from the sludge storage section 18, supplying the material P to the filter 2. The material P supplied to the filter 2 moves in the vertical direction (Z direction) along the filter 2. The material P is filtered while moving along the filter 2. The filtrate filtered from the material P is discharged from a sludge discharge section 4 provided below the filter 2 on the rear side (X2 side), as indicated by the dashed arrow. The filtered material P is discharged to the outside from the lower side of the frame 10 on the front side (Z1 side) of the filter 2, as indicated by the solid arrow.

[0081] The other configurations of the third embodiment are the same as those of the first embodiment.

[0082] (Effects of the third embodiment) In the third embodiment, the following effects can be obtained.

[0083] In the third embodiment, as described above, the angle adjustment mechanism 3 includes a pivoting unit 35 provided on the rear side of the frame 10 opposite the inlet 50 through which the workpiece P is introduced, extending from the frame 10 toward the rear side and rotatable in the vertical direction, and a pivoting unit holding member 36 attached to the lower side of the frame 10 via the pivot center shaft 31, extending from the frame 10 toward the rear side, and having a plurality of grooves or a plurality of notches 37 for holding the pivoting unit 35. The tilt angle θ of the filter 2, together with the frame 10, is changed depending on the position of the pivoting unit holding member 36 that holds the pivoting unit 35. As a result, the pivoting unit 35 and the pivoting unit holding member 36 are located outside the frame 10, and the user can rotate the pivoting unit 35 while checking the tilt angles θ of the frame 10 and the filter 2, thereby changing the tilt angle θ of the frame 10 and the filter 2 to any desired tilt angle θ. Furthermore, by reducing the inclination angle θ, the force with which the material P is pushed along the filter 2 by gravity can be reduced, thereby lengthening the time the material P passes over the filter 2 and increasing the amount of filtration. This increases the proportion of solids in the entire material P, and the concentration of the material P, which is the proportion of solids in the entire material P, becomes higher (concentrated) compared to before filtration. Furthermore, by increasing the inclination angle θ, the force with which the material P is pushed along the filter 2 by gravity can be increased, thereby shortening the time the material P passes over the filter 2 and reducing the amount of filtration compared to when the inclination angle θ is small. This reduces the amount of water removed from the material P, and therefore the concentration of the material P can be reduced compared to when the inclination angle θ is small. As a result, the concentration of the material P after concentration (separation) can be adjusted.

[0084] Other effects of the third embodiment are the same as those of the first embodiment.

[0085] (Variation) The embodiments disclosed herein should be considered to be illustrative and not restrictive in all respects. The scope of the present invention is defined by the claims rather than the above description of the embodiments, and further includes all modifications (variations) within the meaning and scope of the claims.

[0086] For example, in the first to third embodiments, the filter concentrator is provided upstream of the dehydrator, but the present invention is not limited to this. For example, the filter concentrator may be provided upstream of a treatment device that performs a process other than dehydration, such as methane fermentation.

[0087] In addition, in the first to third embodiments, the filter-type concentrator is positioned above the dehydrator, but the present invention is not limited to this. For example, the filter-type concentrator may be positioned at the same height as the dehydrator or below the dehydrator. In this case, the filter-type concentrator may be provided with a pump that pumps up the material concentrated in the filter-type concentrator, and the pump may supply the material to the dehydrator.

[0088] In addition, in the first to third embodiments, an example was shown in which a door was provided on the front surface of the housing, but the present invention is not limited to this. In the present invention, a door may not be provided, or a transparent window that cannot be opened or closed may be provided instead of the door. The door and window may also be provided on the back or side surface of the housing.

[0089] Furthermore, in the first to third embodiments, examples have been shown in which the filter is cleaned from the front side, but the present invention is not limited to this. In the present invention, the filter may be cleaned from the back side.

[0090] In the first to third embodiments, the control unit cleans the filter when it determines that the filter is clogged, but the present invention is not limited to this. The present invention may be configured to provide an operation unit so that the user can clean the filter at any time.

[0091] Furthermore, in the first to third embodiments, examples have been shown in which the filter is a wedge wire, but the present invention is not limited to this. In the present invention, the filter may be a punched metal.

[0092] In the second embodiment, the contact member is an electric cylinder, but the present invention is not limited to this. In the present invention, the contact member may be a servo motor or a stepping motor, as shown in Fig. 16.

[0093] In the second embodiment, the control unit increases the tilt angle when the filter becomes clogged, but the present invention is not limited to this. In the present invention, the control unit may be configured to both increase the tilt angle and clean the filter. In this case, the control unit may be configured to control the rotating member to return the tilt angle of the filter to the original angle after cleaning the filter.

[0094] In the second embodiment, the control unit increases the tilt angle when the filter is clogged, but the present invention is not limited to this. In the present invention, the control unit may decrease the tilt angle and increase the time of the concentration process to achieve a predetermined concentration.

[0095] In the third embodiment, the rotating portion holding member has a plurality of notches for holding the rotating portion, but the present invention is not limited to this. In the present invention, the rotating portion holding member may have a plurality of grooves for holding the rotating portion.

[0096] In addition, in the third embodiment, the inlet has a cylindrical shape, but the present invention is not limited to this. In the present invention, the inlet may have the same configuration as the sludge inlet of the first embodiment. [Explanation of symbols]

[0097] 1 chassis 2. Filters 3 Angle adjustment mechanism 4 Sludge discharge section 5, 50 Sludge input section 6 Control Unit 7 Flowmeter 10 Frame 11 Sludge inlet mounting hole 31 Rotational axis 32 Filter holding member 33 Retaining member mounting portion 33a Retaining member mounting hole 34 Rotating member 34a Drive source 35 Rotating part 36 Rotating portion holding member 50 Inlet 100, 200, 300 filter type concentrator 120 Dehydrator

Claims

1. a housing into which the object to be treated is placed; a filter disposed in an inclined state inside the housing and filtering the object to be treated; an angle adjustment mechanism capable of changing the tilt angle of the filter; a sludge input section that is detachable from the housing, inclined downward so that the filter side is lower, and has an inclined surface that allows the material to be treated to flow into the filter; A filter-type concentrator, wherein the sludge input section is configured to be movable in a horizontal direction.

2. The filter-type concentrator according to claim 1 , wherein the angle adjustment mechanism includes a pivot shaft that rotatably supports the filter.

3. The filter-type concentrator of claim 2, wherein the angle adjustment mechanism includes a filter holding member provided within the housing, which changes the inclination angle of the filter by rotating around the rotation center axis, and which holds the filter at the changed inclination angle, and a holding member mounting portion provided in the housing for attaching the filter holding member to the housing.

4. 4. The filter-type concentrator according to claim 3, wherein the holder mounting portion has a plurality of holder mounting holes arranged in an arc shape around the central axis of rotation.

5. the housing includes a sludge discharge unit disposed below the housing for discharging sludge, which is the filtered material to be treated; The filter-type concentrator according to any one of claims 2 to 4, wherein the rotation center shaft is disposed on the sludge discharge portion side of the filter.

6. A filter-type concentrator as described in any one of claims 1 to 5, wherein the sludge input section is configured to change the direction of the inflow of the material to be treated flowing into the housing toward the filter, and the mounting position at which the filter is attached to the housing can be changed in accordance with changes in the inclination angle of the filter.

7. The filter-type concentrator according to claim 6, wherein the housing further includes a plurality of sludge inlet mounting holes arranged in a rotation direction of the filter, for fixing the sludge inlet to the housing.

8. a flow meter for measuring the amount of filtrate discharged through the filter; 3. The filter-type concentrator according to claim 1, further comprising: a control unit configured to determine whether the filter has become clogged based on the amount of filtrate discharged detected by the flow meter.

9. The filter-type concentrator according to claim 8 , wherein the control unit is configured to control cleaning of the filter based on the determination that the filter is clogged.

10. A flow meter that measures the discharge amount of the filtrate filtered by the filter; a control unit configured to determine whether the filter is clogged based on the amount of filtrate discharged detected by the flow meter; the angle adjustment mechanism further includes a drive source that rotates the filter around the rotation center axis, and a rotating member that abuts against the filter, The filter-type concentrator according to claim 2, wherein the control unit is configured to rotate the filter using the rotating member to adjust the inclination angle of the filter when it determines that the filter is clogged.

11. The filter concentrator according to any one of claims 1 to 10, wherein the filter includes a wedge wire.

12. A filter-type concentrator according to any one of claims 1 to 11, wherein the main body of the filter-type concentrator is installed in a stage preceding the dehydrator, the discharge outlet of the material to be treated is located above the material inlet of the dehydrator, and the concentrated material to be treated is supplied from the discharge outlet to the dehydrator via the material inlet.

13. a frame disposed in an inclined state and into which the material to be treated is introduced; a filter disposed inside the frame and filtering the object to be treated; an angle adjustment mechanism including a rotation center shaft that rotatably supports the frame body and that can change the tilt angle of the filter together with the frame body, The angle adjustment mechanism includes a rotating part that is provided on the rear side of the frame body opposite to the input port through which the workpiece is input, extends from the frame body to the rear side, and is rotatable in the vertical direction, and a rotating part holding member that is attached to the lower side of the frame body via the rotation center shaft, extends from the frame body toward the rear side, and is provided with a plurality of grooves or a plurality of notches for holding the rotating part, The tilt angle of the filter together with the frame is changed depending on the position of the pivoting portion holding member that holds the pivoting portion, The frame has an inlet through which the object to be treated is introduced, A filter-type concentrator, wherein the inlet is located on the opposite side of the filter from the angle adjustment mechanism and on the side of the filter through which the material to be treated flows.

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