Filter washing device and filtration washing method using the same

Abstract

To provide a filtration washing apparatus capable of recovering a solid by performing filtration without damaging a filter for recycling metals used in industry.SOLUTION: Problems can be solved by a filtration washing apparatus comprising: a filtration vessel 1 having a filtrate discharge part 12 discharging the filtrate of a supplied object O to be treated and a slurry discharge part discharging slurry where a dispersion liquid is added to the residue of the object O to be treated; a filter 2 disposed so as to divide the inside of the filtration vessel 1; an agitator 3 having agitation blades 31 positioning at a side supplied with the object O to be treated in the filtration vessel 1 divided by the filter 2; and a slurry sending pump discharging the slurry from the filtration vessel 1.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a filtration device used for recovering precious metals such as gold, platinum, and silver, other metals, and other useful solids, and a filtration method using the same.

Background Art

[0002] Among the solids used in industries such as precious metals such as gold, platinum, and silver, rare metals such as titanium, nickel, and cobalt, and other metals such as palladium, copper, lead, aluminum, and zinc, and other useful solids, the amount produced is small, or a large amount of energy is consumed during mining or refining, or harmful waste is generated. Therefore, after being circulated in the market as products, etc., they are extracted from the products and reused through processes such as filtration.

[0003] For example, Patent Document 1 discloses a series of processes for taking out solids in a raw material slurry by a filtration and drying device 10 that filters a raw material slurry in a container to generate a wet cake containing powder particles, discharges the filtrate through a filter cloth 22 and a filter plate 21 under pressure or reduced pressure, and then washes the cake by displacement washing or agitation washing to remove foreign substances in the cake. Note that the reference numerals in this paragraph are the reference numerals in Patent Document 1.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, in the filtration drying apparatus of Patent Document 1, in order to improve the filtration efficiency, after the raw material slurry is introduced and filtered, and after a certain period of time has elapsed, the stirring blade is lowered below the surface of the cake and rotated to perform an operation of extending the surface. However, a large shearing force is applied between the cake and the filter cloth, which may break the filter cloth and cause the cake to leak out.

[0006] Therefore, in the present invention, in order to reuse solids used in industries such as precious metals such as gold, platinum, and silver, rare metals such as titanium, nickel, and cobalt, other metals such as palladium, copper, lead, aluminum, and zinc, and other useful solids, it is an object of the present invention to provide a filtration and washing apparatus that can perform filtration without damaging a filtration filter such as a filter cloth and recover the solids, and a filtration and washing method using the same.

Means for Solving the Problems

[0007] 〔1〕That is, Containing at least one solid selected from precious metals, rare metals, palladium, copper, lead, aluminum, and zinc Send the object to be treated (O) into the filtration container (1) for the first filtration. Add a cleaning liquid (WL) to the residue of the object to be treated (O) for cleaning, and perform the second filtration. Discharge the slurry (S) obtained by adding the dispersion liquid (AS) to the residue of the object to be treated (O). A filtrate discharge section (12) for discharging the filtrate obtained by filtering the supplied fluidized object to be treated (O), a filtration container (1) having a slurry discharge section (13) for discharging a slurry (S) in which a dispersion liquid (AS) is added to the residue of the object to be treated (O), a filtration filter (2) disposed so as to partition the inside of the filtration container (1), a stirrer (3) having a stirring blade (31) located on the side where the object to be treated (O) is supplied within the filtration container (1) partitioned by the filtration filter (2), and a slurry feed pump (SP) for discharging the slurry (S) from the filtration container (1). The Send the object to be treated (O) into the filtration container (1) for the first filtration. Add a cleaning liquid (WL) to the residue of the object to be treated (O) for cleaning, and perform the second filtration. Discharge the slurry (S) obtained by adding the dispersion liquid (AS) to the residue of the object to be treated (O). (O) Add a cleaning liquid (WL) to the residue and clean, perform the second filtration, and discharge the slurry (S) obtained by adding the dispersion liquid (AS) to the residue of the object to be treated ( O) A control device (4) for performing control A filtration and washing apparatus, characterized by comprising the above.

[0009] 〔 2And a workpiece feed pump (OP) for feeding the workpiece (O) from the workpiece container (5) for storing the workpiece (O) into the filtration container (1), a filtrate feed pump (FP) that communicates with the filtrate discharge section (12) and feeds the filtrate into the filtrate container (6), a cleaning liquid feed pump (WP) for feeding the cleaning liquid (WL) from the cleaning liquid container (7) for storing the cleaning liquid (WL) to the side of the filtration container (1) where the workpiece (O) is fed, and a dispersion liquid feed pump (AP) for feeding the dispersion liquid (AS) from the dispersion liquid container (9) for storing the dispersion liquid (AS) to the side of the filtration container (1) where the workpiece (O) is fed. characterized by comprising the above In [1] filtration and cleaning device described.

[0010] 3 And a first filtration step of filtering the workpiece (O) supplied to the filtration container (1) with the filtration filter (2), a cleaning liquid feed step of adding the cleaning liquid (WL) to the residue of the workpiece (O) after the first filtration step, a cleaning step of cleaning the residue of the workpiece (O) by rotation of the stirring blade (31) after the cleaning liquid feed step, a second filtration step of filtering the cleaning liquid (WL) after the cleaning step, a dispersion liquid feed step of adding the dispersion liquid (AS) to the residue of the workpiece (O) after the second filtration step, and a slurry discharge step of discharging the slurry (S) after the dispersion liquid feed step, characterized by comprising the above [1] Or the above [2] A filtration and cleaning method using the filtration and cleaning device described in the above.

[0011] 4 And in the slurry discharge step, characterized by rotating the stirring blade (31), the above 3 filtration and cleaning method using the filtration and cleaning device described.

Advantages of the Invention

[0012] ​​According to the filtration and washing device and method of the present invention, in order to reuse solids used in industries such as precious metals such as gold, platinum, and silver, rare metals such as titanium, nickel, and cobalt, and other metals such as palladium, copper, lead, aluminum, and zinc, and other useful solids, filtration can be performed without damaging a filtration filter such as a filter cloth, and the solids can be recovered.

Brief Description of the Drawings

[0013]

Figure 1

Figure 2

Figure 3

Figure 4

Embodiments for Carrying Out the Invention

[0014] Hereinafter, embodiments of the filtration and washing device according to the present invention will be described in detail with reference to the accompanying drawings. The embodiments described below are preferred specific examples for carrying out the present invention, and thus various technical limitations are imposed. However, the present invention is not limited to this form unless otherwise specified in the following description.

[0015] As shown in FIGS. 1 to 4, the filtration and washing device includes a filtration container 1, a filtration filter 2, a stirrer 3, a control device 4, a container 5 for the object to be treated, a container 6 for the filtrate, a container 7 for washing, a container 8 for the waste washing liquid, a container 9 for the dispersion liquid, a slurry container ST, a slurry feed pump SP, etc. It is a device that discharges the useful solid as a slurry S after washing the object to be treated O in which useful solids such as metals and liquid substances are mixed and have fluidity. In each drawing, the control device 4 is simply shown, but as will be described later, it is electrically connected to various members to be controlled by wire or wirelessly.

[0016] The filtration container 1 is a member having a workpiece supply unit 11 that supplies a workpiece O having fluidity, a filtrate discharge unit 12 that discharges filtrate by filtration, and a slurry discharge unit 13 that discharges a slurry S in which a dispersion liquid AS is added to the residue of the workpiece O. The filtration container 1 has a can shape with a circular or polygonal cross section, and can filter the workpiece O using a filtration filter 2 described later disposed inside. At the upper part of the filtration container 1, a workpiece supply unit 11 that supplies the workpiece O, a filtrate discharge unit 12 that discharges the filtrate, and a slurry discharge unit 13 that discharges a slurry S in which a dispersion liquid AS is added to the residue of the workpiece O are respectively disposed. The workpiece O contains solids used in industries such as precious metals such as gold, platinum, and silver, rare metals such as titanium, nickel, and cobalt, other metals such as palladium, copper, lead, aluminum, and zinc, and other useful solids. For example, it is a crude product having fluidity that has been recovered after decomposition and extraction from these products after being circulated in the market as household appliances and the like. The workpiece O is washed, filtered, etc., discharged from the filtration container 1 as a slurry S, and the solids such as the metal contained therein are further recovered using other devices and the like. In the present embodiment, the filtration container 1 has a workpiece supply unit 11 that supplies the workpiece O. However, in other embodiments, the workpiece O may be supplied into the filtration container 1 by other containers or instruments such as a bucket or a hose through the opening at the upper part of the filtration container 1 without providing the workpiece supply unit 11.

[0017] The object to be processed supply unit 11 for supplying the object to be processed O is a pipe for feeding the object to be processed O from the container 5 for the object to be processed that stores the object to be processed O through the liquid feed pump OP for the object to be processed, and is arranged to discharge into the filtration container 1 from the upper part of the filtration container 1. The filtrate discharge unit 12 is a pipe for feeding the filtrate filtered by the filtration filter 2 to the filtrate container 6 through the filtrate liquid feed pump FP, and is arranged at the lower part of the filtration container 1 and below the filtration filter 2. The slurry discharge unit 13 is a pipe for feeding the slurry S to the slurry container ST through the slurry liquid feed pump SP, and has an opening in the filtration container 1 above the filtration filter 2 and in the vicinity of the filtration filter 2.

[0018] The cleaning liquid supply unit 14 is a pipe for feeding the cleaning liquid WL from the cleaning liquid container 7 that stores the cleaning liquid WL through the cleaning liquid liquid feed pump WP, and is arranged to discharge into the filtration container 1 from the upper part of the filtration container 1. The dispersion liquid supply unit 15 is a pipe for feeding the dispersion liquid AS from the dispersion liquid container 9 that stores the dispersion liquid AS through the dispersion liquid liquid feed pump AP, and is arranged to discharge into the filtration container 1 from the upper part of the filtration container 1.

[0019] The filtration filter 2 is a member arranged inside the filtration container 1 to partition the inside of the filtration container 1 between the object to be processed supply unit 11 and the filtrate discharge unit 12. By performing separation such as solid-liquid separation of the object to be processed O or adding the cleaning liquid WL for cleaning and then performing solid-liquid separation, impurities adhering to the solid matter contained in the object to be processed O can be removed. Specifically, the filtration filter 2 is preferably a porous member made of an organic substance such as filter cloth, filter paper, or filter membrane for solid-liquid separation, and further preferably has a thickness of 100 μm to 2 mm.

[0020] The stirrer 3 is a member having a stirring blade 31 located inside the filtration container 1 partitioned by the filtration filter 2 and on the side where the object to be treated O is supplied. In the present embodiment, the stirring blade 31 is located between the object to be treated supply section 11 and the filtration filter 2. By rotating the stirring blade 31, in the cleaning step of sending the cleaning liquid WL into the filtration container 1 after the first filtration step to clean the residue of the object to be treated O, the cleaning efficiency can be improved, and in the slurry discharge step, the residue of the object to be treated O and the dispersion liquid AS after the second filtration step can be mixed approximately uniformly to form a suspension state, and further maintain that state, etc., so that the cleaning step and the slurry discharge step can be carried out smoothly. Note that the stirrer 3 rotationally drives the stirring blade 31 by electric power supplied from an external power source (not shown). Also, the stirring blade 31 is shown as two blades in the present embodiment, but in other embodiments, it can be one blade or a plurality of three or more blades as long as the filtration step and the cleaning step can be carried out smoothly.

[0021] The control device 4 performs first control to operate the workpiece liquid supply pump OP to supply the workpiece O in the workpiece container 5 into the filtration container 1, operates the filtrate liquid supply pump FP, operates the suction force of the filtrate liquid supply pump FP or a decompression device (not shown), and performs second control to perform the first filtration to separate the workpiece O into solid matter and liquid matter by the pressure difference between the upper and lower parts of the filtration filter 2 generated by the decompression device, operates the cleaning liquid supply pump WP to supply the cleaning liquid WL in the cleaning liquid container 7 into the filtration container 1, adds the cleaning liquid WL to the residue of the workpiece O, and performs third control to operate the stirrer 3 to perform cleaning, operates the filtrate liquid supply pump FP, operates the suction force of the filtrate liquid supply pump FP or a decompression device (not shown), and performs fourth control to perform the second filtration to separate the residue of the workpiece O and the cleaning liquid WL into solid matter and liquid matter by the pressure difference between the upper and lower parts of the filtration filter 2 generated by the decompression device, and then performs fifth control to operate the slurry liquid supply pump SP to discharge the slurry S obtained by adding the dispersion liquid AS to the residue of the workpiece O to the slurry container ST, etc. It is a member that undertakes functions such as the control of various operations. Further, the control device 4 is electrically connected to the workpiece liquid supply pump OP, the filtrate liquid supply pump FP, a decompression device (not shown), the cleaning liquid supply pump WP, the stirrer 3, the slurry liquid supply pump SP, etc., and controls the operation timing of each device. By the control device 4, the solid-liquid separation of the workpiece O, the cleaning and discharge of the residue after filtration can be automatically performed.

[0022] Specifically, the control device 4 is preferably a part of the device constituting the computer and is mounted as a part of the central processing unit as a semiconductor integrated circuit. The control device 4 is combined with an input device, an output device, a storage device, an arithmetic device, etc. (not shown), and using the application software stored in the storage device, enables the operator to monitor the situations such as the first control to the fifth control, and preferably enables the operator to manually switch the controls such as the first control to the fifth control in case of emergency.

[0023] The container 5 for the object to be processed is a container for storing the object to be processed O. The container 5 for the object to be processed has a can shape with a circular or polygonal cross-section, and in order to feed the object to be processed O stored therein to the object to be processed liquid feed pump OP, a pipe is provided that continues from the lower part inside the container 5 for the object to be processed to the object to be processed liquid feed pump OP.

[0024] The container 6 for filtrate is a container for storing the filtrate obtained by filtering the object to be processed O with the filter 2. The container 6 for filtrate has a can shape with a circular or polygonal cross-section, and a pipe is provided that is connected to feed the filtrate from the filtrate liquid feed pump FP connected to the filtrate discharge part 12 of the filtration container 1 to the container 6 for filtrate.

[0025] The container 7 for cleaning is a container for storing the cleaning liquid WL. The cleaning liquid WL is a liquid agent for removing impurities adhering to useful substances such as metals contained in the object to be processed O. For example, when the object to be processed O contains platinum, a basic aqueous solution such as an aqueous ammonium chloride solution or an acidic aqueous solution such as hydrochloric acid can be used. The container 7 for cleaning has a can shape with a circular or polygonal cross-section, and in order to feed the cleaning liquid WL stored therein to the cleaning liquid feed pump WP, a pipe is provided that continues from the lower part inside the container 7 for cleaning to the cleaning liquid feed pump WP.

[0026] The waste cleaning liquid container 8 is a container for storing the waste cleaning liquid filtered by the filtration filter 2 after the cleaning liquid WL is sent to the filtration container 1 for cleaning. The waste cleaning liquid container 8 is in the shape of a can with a circular or polygonal cross-section, and is provided with a pipe connected to send the waste cleaning liquid from the filtrate discharge part 12 of the filtration container 1 to the waste cleaning liquid container 8. When discharging the filtrate and the waste cleaning liquid after cleaning, a branch valve is provided on the downstream side of the filtrate feed pump FP to branch and send the filtrate to the filtrate container 6 and the waste cleaning liquid to the waste cleaning liquid container 8 respectively, so that the filtrate discharge part 12 can be used for both purposes. Also, a branch valve is provided between the filtrate discharge part 12 and the filtrate feed pump FP. Different from the filtrate feed pump FP, a waste cleaning liquid feed pump capable of discharging the filtered cleaning liquid WL is connected, and the waste cleaning liquid container 8 is provided on the downstream side thereof, so that the waste cleaning liquid can be sent to the waste cleaning liquid container 8. Or, a discharge port for the waste cleaning liquid different from the filtrate discharge part 12 is provided in the filtration container 1, and the waste cleaning liquid can be sucked by the waste cleaning liquid feed pump and sent to the waste cleaning liquid container 8.

[0027] The dispersion liquid container 9 is a container for storing the dispersion liquid AS. The dispersion liquid container 9 is in the shape of a can with a circular or polygonal cross-section, and is provided with a pipe continuing from the lower part inside the dispersion liquid container 9 to the dispersion liquid feed pump AP to send the dispersion liquid AS stored inside to the dispersion liquid feed pump AP. After performing a cleaning step of cleaning the residue of the object to be treated O after the first filtration step of filtering the object to be treated O with the cleaning liquid WL, and then after the second filtration step of filtering the cleaning liquid WL, since the residue of the object to be treated O is in a solid state, the dispersion liquid AS is a liquid medium for making a slurry S and sending it to the slurry container ST. The dispersion liquid AS can be variously used as long as it is a liquid at room temperature such as 25°C. For example, water or organic solvents such as toluene, hexane, ethyl acetate, acetone, ethanol, and methanol are preferred, and those containing a solute may also be used. For example, a basic aqueous solution such as an aqueous ammonium chloride solution, an acidic aqueous solution such as hydrochloric acid, or even a liquid such as industrial water can be used as the dispersion liquid AS. By selecting such a dispersion liquid AS, the residue of the object to be treated O after the second filtration step can be sent to and stored in the slurry container ST as a liquid substance called the slurry S.

[0028] The slurry container ST is a container for storing the slurry S obtained by mixing the dispersion liquid AS with the object to be treated O after the second filtration step. The slurry container ST has a can shape with a circular or polygonal cross-section, and is provided with a pipe connected to the slurry feed pump SP connected to the slurry discharge part 13 of the filtration container 1 for feeding the slurry from the slurry feed pump SP to the slurry container ST.

[0029] Next, a series of operation procedures of an embodiment when all the operations of washing the object to be treated O containing useful solids such as metal and having fluidity and discharging it from the filtration container 1 as the slurry S are automated for the filtration and washing apparatus of the present invention will be described.

[0030] First, upon receiving an instruction to start operation from the control device 4, the object to be treated feed pump OP feeds the object to be treated O to the filtration container 1 through the object to be treated supply part 11, and continues feeding until the liquid level detection sensor or the like provided at the lower part of the object to be treated container 5 and electrically connected to the control device 4 no longer detects the object to be treated O, or until the liquid level detection sensor or the like provided at the upper part of the filtration container 1 and electrically connected to the control device 4 detects the object to be treated O. Then, as shown in FIG. 1, when the filtrate feed pump FP connected to the filtration container 1 and electrically connected to the control device 4 receives an instruction to start operation from the control device 4 and operates, the lower part of the filtration filter 2 in the filtration container 1 is sucked, so that the supplied object to be treated O is filtered by the filtration filter 2. Thus, the step of filtering the object to be treated O supplied to the filtration container 1 by the filtration filter 2 is the first filtration step. When the internal volume of the filtration container 1 is relatively small, etc., it may be controlled to repeat a plurality of times such as executing the first filtration step again after the first filtration step.

[0031] Then, as shown in FIG. 1, during the first filtration step, the filtrate feed pump FP feeds the filtrate filtered by the filtration filter 2 to the filtrate container 6 through the filtrate discharge part 12.

[0032] After the completion of the first filtration step, upon receiving an instruction to start operation from the control device 4, the cleaning liquid feed pump WP feeds the cleaning liquid WL into the filtration container 1 via the cleaning liquid supply unit 14, and continues to feed the cleaning liquid WL until it is no longer detected by a liquid level detection sensor or the like provided at the lower part of the cleaning liquid container 7 and electrically connected to the control device 4, or until the cleaning liquid WL is detected by a liquid level detection sensor or the like provided at the upper part of the filtration container 1 and electrically connected to the control device 4. Thus, the step of adding the cleaning liquid WL to the residue of the object O to be processed after the first filtration step is the cleaning liquid feeding step.

[0033] Then, as shown in FIG. 2, upon receiving an instruction to start operation from the control device 4, the stirrer 3 rotates the stirring blade 31 to stir and mix the residue of the object O to be processed after the first filtration step and the cleaning liquid WL for a predetermined time to clean the residue of the object O to be processed. Thus, the step of cleaning the residue of the object O to be processed by rotating the stirring blade 31 after the cleaning liquid feeding step is the cleaning step.

[0034] Then, as shown in FIG. 3, after the completion of the cleaning step, when the filtrate feed pump FP operates upon receiving an instruction to start operation from the control device 4, the lower part of the filtration filter 2 in the filtration container 1 is suctioned, so that the residue of the object O to be processed after the first filtration step and the cleaning liquid WL are filtered by the filtration filter 2. Thus, the step of filtering the waste cleaning liquid after cleaning after the cleaning step is the second filtration step.

[0035] Then, as shown in FIG. 3, during the second filtration step, the filtrate feed pump FP feeds the filtered waste cleaning liquid into the waste cleaning liquid container 8 via the filtrate discharge unit 12, the filtrate feed pump FP, and a branch valve (not shown). In addition, when the internal volume of the filtration container 1 is relatively small, etc., it may be controlled to repeat the cleaning step and the second filtration step a plurality of times, such as executing them again after the second filtration step.

[0036] Then, upon receiving an instruction to start operation from the control device 4, the aqueous solvent liquid feed pump AP feeds the dispersion liquid AS to the filtration container 1 via the dispersion liquid supply unit 15, and continues feeding until the liquid level detection sensor or the like provided at the lower part of the dispersion liquid container 9 and electrically connected to the control device 4 no longer detects the dispersion liquid AS, or until the liquid level detection sensor or the like provided at the upper part of the filtration container 1 and electrically connected to the control device 4 detects the dispersion liquid AS. In this way, the step of adding the dispersion liquid AS to the residue of the object to be treated O after the second filtration step is the dispersion liquid feeding step.

[0037] Then, as shown in FIG. 4, after the completion of the dispersion liquid feeding step, upon receiving an instruction to start operation from the control device 4, the slurry liquid feed pump SP feeds the slurry S, which is a mixture of the residue of the object to be treated O after the second filtration step and the dispersion liquid AS, to the slurry container ST via the slurry discharge unit 13. In this way, the step of creating and discharging the slurry S after the dispersion liquid feeding step is the slurry discharging step. Also, in the slurry discharging step, in order to approximately uniformly mix the residue of the object to be treated O after the second filtration step and the dispersion liquid AS to form a suspension state, etc., after the dispersion liquid AS is fed to the filtration container 1, upon receiving an instruction to start operation from the control device 4, it is preferable that the stirrer 3 operates to rotate the stirring blade 31. By rotating the stirring blade 31 after the dispersion liquid AS is fed to the filtration container 1 in this way, the useful solids contained in the residue of the object to be treated O after the second filtration step can be recovered as the slurry S without damaging the filtration filter 2 such as the filter cloth, and an approximately uniform mixed suspension state can be maintained so that the slurry S does not separate during the feeding of the slurry S to the slurry container ST. Incidentally, after the slurry discharging step, when the internal volume of the filtration container 1 is relatively small, or when it is determined that the discharge of the slurry S is not sufficient using sensors such as an image sensor or an ultrasonic sensor provided above the filtration filter 2 in the filtration container 1, it is preferable that the control device 4 can repeat a plurality of times such as executing the dispersion liquid feeding step and the slurry discharging step again.

[0038] In this way, using the filtration and cleaning device of the present invention, a series of operations can be performed to clean the object to be treated O containing useful solids such as metals and having fluidity, and discharge it from the filtration container 1 as a slurry S.

Explanation of Signs

[0039] 1 ··· Filtration container 11 ··· Object to be treated supply section 12 ··· Filtrate discharge section 13 ··· Slurry discharge section 14 ··· Cleaning liquid supply section 15 ··· Dispersion liquid supply section 2 ··· Filtration filter 3 ··· Stirrer 31 ··· Stirring blade 4 ··· Control device 5 ··· Container for object to be treated 6 ··· Container for filtrate 7 ··· Container for cleaning liquid 8 ··· Container for waste cleaning liquid 9 ··· Container for dispersion liquid ST ··· Container for slurry O ··· Object to be treated S ··· Slurry OP ··· Object to be treated liquid transfer pump FP ··· Filtrate liquid transfer pump SP ··· Slurry liquid transfer pump WP ··· Cleaning liquid transfer pump AP ··· Dispersion liquid transfer pump WL ··· Cleaning liquid AS ··· Dispersion liquid

Claims

1. A filtration vessel (1) having a filtrate discharge section (12) for discharging a filtrate obtained by filtering a fluid material (O) containing at least one solid material selected from precious metals, rare metals, palladium, copper, lead, aluminum, and zinc, and a slurry discharge section (13) for discharging a slurry (S) in which a dispersion liquid (AS) is added to the residue of the material (O), a filtration filter (2) arranged to partition the inside of the filtration vessel (1); an agitator (3) having an agitating blade (31) located in the filtering vessel (1) separated by the filtering filter (2) on the side to which the material (O) is supplied; a slurry delivery pump (SP) for discharging the slurry (S) from the filtration vessel (1); A control device (4) that controls the following: sending the object (O) to be treated into the filtration vessel (1), performing a first filtration, adding a washing liquid (WL) to the residue of the object (O) to wash it, performing a second filtration, and discharging the slurry (S) obtained by adding the dispersion liquid (AS) to the residue of the object (O); A filtration and cleaning device comprising:

2. a treatment object liquid delivery pump (OP) for delivering the treatment object (O) from a treatment object container (5) for storing the treatment object (O) into the filtration container (1); a filtrate delivery pump (FP) communicating with the filtrate discharge portion (12) and delivering the filtrate to a filtrate container (6); a cleaning liquid delivery pump (WP) for delivering the cleaning liquid (WL) from a cleaning liquid container (7) for storing the cleaning liquid (WL) to a side of the filtration container (1) to which the object to be treated (O) is delivered; a dispersion liquid delivery pump (AP) for delivering the dispersion liquid (AS) from a dispersion liquid container (9) for storing the dispersion liquid (AS) to a side of the filtration container (1) to which the object to be treated (O) is delivered; The filtering and cleaning device according to claim 1, further comprising:

3. a first filtration step of filtering the material (O) supplied to the filtering vessel (1) with the filtering filter (2); a cleaning liquid supplying step of adding the cleaning liquid (WL) to the residue of the object to be treated (O) after the first filtration step; a washing step of washing residues of the object to be treated (O) by rotating the stirring blade (31) after the washing liquid sending step; a second filtration step of filtering the cleaning liquid (WL) after the cleaning step; a dispersion liquid delivery step of adding the dispersion liquid (AS) to the residue of the object to be treated (O) after the second filtration step; The filtration and washing method using the filtration and washing device according to claim 1 or 2, further comprising a slurry discharge step of discharging the slurry (S) after the dispersion liquid delivery step.

4. The filtration and washing method using the filtration and washing device according to claim 3, characterized in that in the slurry discharging step, the stirring blade (31) is rotated.

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