KR102634957B1 - Apparatus and method for cleaning precursor for secondary battery of vertical filter press - Google Patents

Abstract

The present invention includes a raw material tank 10 in which raw materials are accommodated, a vertical filter press 11 connected to the raw material tank 10 and supplied with raw materials from the raw material tank 10, and an inside of the vertical filter press 11. A filter cloth pressing plate 15 is provided to filter the slurry contained in the raw material supplied from the raw material tank 10, and is provided between the raw material tank 10 and the filter cloth pressing plate 15, the raw material tank A pump unit (20) that supplies the raw material contained in (10) to the filter cloth press plate (15), is connected to the filter cloth press plate (15) and supplies press water for pressing the slurry to the filter cloth press plate (15). A supply compressed water tank 25, a drying unit 40 provided on the other side of the filter cloth pressing plate 15 and drying the raw material filtered by the filter cloth pressing plate 15 with air or nitrogen, the drying unit An air tank 45 is connected to (40) and supplies air or nitrogen for drying raw materials to the drying unit 40, and is provided between the filter cloth pressing plate 15 and the drying unit 40, A washing unit 30 that washes the raw materials filtered by the filter cloth pressing plate 15 or the raw materials dried by the drying unit 40, is connected to the washing unit 30, and is provided to the washing unit 30. A caustic soda tank 35 that supplies caustic soda for washing raw materials, is provided on the other side of the caustic soda tank 35, and is connected to the washing unit 30 to wash the raw materials in the washing unit 30. a washing water tank 50 for supplying pure water, a cold/temperature conditioner 55 connected to the raw material tank 10 and supplying cold air for cooling the raw material or warm air for heating the raw material to the raw material tank 10 ) and an air compressor 60 connected to the air tank 45 and supplying air or nitrogen to the air tank 45, and the washing water tank 50 can maintain the temperature of pure water at a constant level. It has a constant temperature function, and the filter cloth pressing plate 15 is characterized by including a filter cloth 16, which is a fiber for filtering the slurry suspended in the raw material.

Description

Vertical filter press precursor cleaning apparatus and method for secondary battery {Apparatus and method for cleaning precursor for secondary battery of vertical filter press}

The present invention relates to a precursor cleaning device and method for a vertical filter press secondary battery, and more specifically, to primary filtering using a filter plate pressing plate, primary drying using air or nitrogen, primary washing using caustic soda, and filter plate pressing plate. The precursor that becomes the basic material of the cathode material is sequentially processed through secondary filtering, secondary drying with air or nitrogen, secondary washing with pure water, tertiary filtration using a filter plate compression plate, and tertiary drying with air or nitrogen. It relates to a precursor cleaning device and method for a vertical filter press secondary battery that can clean and stably clean the precursor.

Secondary batteries are considered the industry that will succeed the semiconductor legend. In the global market excluding China, domestic companies' secondary battery market share was 53%, more than half. The status of batteries is expanding beyond battery cells to the entire secondary battery ecosystem, including materials and equipment. While the production of electric vehicles is expected to explode to 54 million units in 2030, the competition for battery supremacy is expected to become increasingly fierce.

When a specific substance is created through a chemical reaction, a precursor refers to the substance at the stage immediately before the final substance is created. Precursors are the basic materials for making cathode materials in secondary batteries and are considered a key material that plays a decisive role in increasing capacity and lifespan.

The precursor is created through a chemical reaction in a metal solution containing nickel, cobalt, manganese, and aluminum, followed by precipitation, washing, and drying. The metal components mainly used in the precursor are nickel, which determines energy density, cobalt and manganese, which improve stability, and aluminum, which improves output. The capacity of the battery affects the driving range of the electric vehicle, energy density affects the output of the electric vehicle, stability affects the battery's ability to control accidents such as fire, and lifespan affects the period of use of the battery.

Anode material is a key material that determines the capacity and voltage that determines battery performance and is one of the four major battery materials: anode material, cathode material, electrolyte, and separator. The cathode material is produced by mixing lithium hydroxide with a fine powder precursor and then performing plastic processing. The anode material is again used as a core material of secondary batteries along with the cathode material, separator, and electrolyte, and is used as batteries for electric vehicles, portable electronic devices, and home appliances.

Cathode materials account for approximately 40% of the battery cost, and precursors account for approximately 65 to 70% of the cost of the cathode materials.

However, in the existing precursor washing process, the filtering, washing, and drying processes are not systematically repeated, so there is a problem in that it is difficult to cleanly and stably wash the precursor.

In addition, in the existing precursor washing process, it is difficult to recover the washing water used in the washing process, which increases the amount of washing water used, leading to a sharp increase in production costs.

In addition, in the existing precursor washing process, the filtering, washing, and drying processes are not automatically performed, so there is a problem that the productivity of the precursor washing process may be reduced.

KR 10-1883406 B1

The present invention was developed to solve the above problems, and the purpose of the present invention is to provide primary filtering using a filter plate pressing plate, primary drying using air or nitrogen, primary washing using caustic soda, and filtering using a filter plate pressing plate. The precursor that becomes the basic material of the cathode material is sequentially processed through secondary filtering, secondary drying with air or nitrogen, secondary washing with pure water, tertiary filtration using a filter plate compression plate, and tertiary drying with air or nitrogen. The aim is to provide a precursor cleaning device and method for a vertical filter press secondary battery that can be cleaned, cleanly, and stably.

In addition, the object of the present invention is to recover the compressed water used in the filtering process and the caustic soda or pure water used in the cleaning process, respectively, thereby reducing the production cost by reducing the amount of pressed water, caustic soda, and pure water used. The object is to provide a precursor cleaning device and method for a filter press secondary battery.

In addition, the purpose of the present invention is to automatically perform the primary filtering, primary drying, primary washing, secondary filtering, secondary drying, secondary washing, tertiary filtering, and tertiary drying processes, thereby increasing the productivity of the precursor. The aim is to provide a precursor cleaning device and method for a vertical filter press secondary battery that can be dramatically improved.

In order to solve the above technical problems, the precursor washing device for a vertical filter press secondary battery according to the present invention includes a raw material tank 10 in which raw materials are received, and is connected to the raw material tank 10, and the raw material tank 10 ), a vertical filter press 11 to which raw materials are supplied, a filter cloth pressing plate 15 provided inside the vertical filter press 11 to filter the slurry contained in the raw materials supplied from the raw material tank 10, A pump unit 20 provided between the raw material tank 10 and the filter cloth pressing plate 15 to supply the raw material contained in the raw material tank 10 to the filter cloth pressing plate 15, the filter cloth pressing plate ( A compressed water tank 25 is connected to the filter fabric compression plate 15 and supplies compressed water for compressing the slurry to the filter fabric compression plate 15, and is provided on the other side of the filter fabric compression plate 15, and the filter fabric compression plate 15 ), a drying unit 40 that dries the filtered raw materials with air or nitrogen, an air tank connected to the drying unit 40 and supplying air or nitrogen for drying the raw materials to the drying unit 40 ( 45), provided between the filter cloth pressing plate 15 and the drying unit 40, to wash the raw materials filtered by the filter cloth pressing plate 15 or the raw materials dried by the drying unit 40. A unit 30, a caustic soda tank 35 connected to the washing unit 30 and supplying caustic soda for washing raw materials to the washing unit 30, is provided on the other side of the caustic soda tank 35. A washing water tank 50 is connected to the washing unit 30 and supplies pure water for washing raw materials to the washing unit 30, and is connected to the raw material tank 10, and the raw material tank 10 ) and an air compressor connected to the air tank 45 and supplying air or nitrogen to the air tank 45 ( 60), wherein the washing water tank 50 has a constant temperature function capable of maintaining a constant temperature of pure water, and the filter cloth pressing plate 15 is a filter cloth 16, which is a fiber for filtering the slurry suspended in the raw material. ) is characterized in that it includes.

In addition, a first raw material supply line (A1) is connected to the output side of the raw material tank 10 and the input side of the pump unit 20, respectively, and moves the raw material discharged from the raw material tank 10 to the pump unit 20. ), a second raw material supply line that is connected to the output side of the pump unit 20 and the input side of the filter cloth pressing plate 15, and moves the raw material discharged from the pump unit 20 to the filter cloth pressing plate 15 ( A2), the first raw material discharge is connected to the output side of the filter cloth pressing plate 15 and the input side of the raw material tank 10, so that the raw material discharged from the filter cloth pressing plate 15 moves to the raw material tank 10 Line A3, a pressed water supply line connected to the output side of the pressed water tank 25 and the filter cloth pressing plate 15, and supplying the pressed water discharged from the pressed water tank 25 to the filter cloth pressing plate 15. (B1), a pressed water recovery line connected to the input side of the filter cloth pressing plate 15 and the pressed water tank 25, respectively, and recovering the pressed water discharged from the filter cloth pressing plate 15 to the pressed water tank 25 ( B2), connected to the output side of the caustic soda tank 35, a caustic soda supply line (C1) through which the caustic soda discharged from the caustic soda tank 35 moves, connected to the output side of the washing water tank 50 The washing water supply line (C2) through which the washing water discharged from the washing water tank 50 moves, the caustic soda supply line (C1), the washing water supply line (C2), and the input side of the washing unit 30, respectively. A first washing water supply line (C3), which is connected and moves the caustic soda that has passed through the caustic soda supply line (C1) or the washing water that has passed through the washing water supply line (C2) to the washing unit 30. 1 are respectively connected to the washing water supply line (C3) and the input side of the filter cloth pressing plate 15, so that the caustic soda or washing water passing through the first washing water supply line (C3) moves to the input side of the filter cloth pressing plate 15. The second washing water supply line (C4) is connected to the output side of the air tank 45 and the input side of the drying unit 40, so that the air discharged from the air tank 45 moves to the drying unit 40. The first air supply line (E1) is connected to the output side of the air tank 45 and the input side of the filter cloth pressing plate 15, so that the air discharged from the air tank 45 is directed to the filter cloth pressing plate 15. It is characterized in that it further includes a moving second air supply line (E2).

In addition, a first ball valve (PV1) provided on the second raw material supply line (A2) and configured to be opened and closed, a second ball valve provided on the second washing water supply line (C4) and configured to be opened and closed. (PV2), a third ball valve (PV3) provided on the second air supply line (E2) and configured to be open and closed, the output side of the filter cloth pressing plate (15) on the first raw material discharge line (A3), and A fourth ball valve PV4 is provided to be spaced apart from the input side of the raw material tank 10 on the first raw material discharge line A3 and is configured to be open and closed. A ball valve (PV6) is provided on the pressed water supply line (B1) to be spaced apart from the filter cloth pressing plate (15), and an eighth ball valve (PV8) is formed to be openable and closed, and is installed on the pressed water recovery line (B2). A 9th ball valve (PV9), which is provided and formed to be openable and closed, on the first washing water supply line (C3), and a 10th ball valve (PV10), which is provided and formed to be openable and closed, on the caustic soda supply line (C1) An 11th ball valve (PV11) provided on and capable of being opened and closed, a 12th ball valve (PV12) provided on the cleaning water supply line (C2) and formed to be openable and closed, and a first air supply line (E1) It is characterized in that it further includes a controller 70 that controls the opening and closing of the fifteenth ball valve (PV15) provided on the top and configured to be open and closed, respectively, and the plurality of ball valves.

In addition, it is connected to the washing unit 30 and is connected to a wastewater tank 65 that accommodates the wastewater discharged from the washing unit 30, and is connected to the input side of the washing unit 30 and the wastewater tank 65, respectively, The wastewater discharged from the washing unit 30 is connected to the first wastewater discharge line (D1), the first raw material discharge line (A3), and the first wastewater discharge line (D1) moving to the wastewater tank 65, respectively. Thus, the wastewater discharged from the first raw material discharge line moves to the first wastewater discharge line (D1), the second wastewater discharge line (D2), the second raw material supply line (A2), and the first wastewater discharge line ( A third wastewater discharge line (D3), which is respectively connected to D1), through which wastewater discharged from the second raw material supply line (A2) moves to the first wastewater discharge line (D1), and a second wastewater discharge line (D2) ) is connected to a first air discharge line (E3) through which air passing through the second wastewater discharge line (D2) is discharged to the outside, is provided on the second wastewater discharge line (D2), and is formed to be openable and closed. A fifth ball valve (PV5), which is provided on the first air discharge line (E3) and a thirteenth ball valve (PV13) that can be opened and closed, is provided on the third wastewater discharge line (D3), A fourteenth ball valve (PV14) that can be opened and closed, a first measuring device provided on the first raw material discharge line (A3) and measuring the turbidity and refraction of the raw material moving through the first raw material discharge line (A3). (66), a second measuring device 67 provided on the second wastewater discharge line (D2) and measuring the PH concentration and ionic conductivity of the wastewater moving through the second wastewater discharge line (D2), respectively. 1 A machine provided on the air discharge line (E3) to remove moisture contained in the air passing through the first air discharge line (E3) and a water film present on the inner wall of the first air discharge line (E3). It is characterized in that it further includes a separator (68).

In addition, the filter cloth 16 is first cleaned with pure water and air, and in the raw material tank 10, after the filter cloth 16 is first cleaned, the raw materials and pure water are respectively introduced at a preset standard ratio. After mixing, the pump unit 20 supplies the raw material contained in the raw material tank 10 to the filter cloth pressing plate 15, and the filter cloth pressing plate 15 supplies the raw material supplied from the raw material tank 10. The slurry contained in the raw materials is first filtered for 45 to 55 seconds under a pressure condition of 0.3 to 0.4 MPa, and the drying unit 40 filters the primarily filtered raw materials for 30 to 60 seconds under a pressure condition of 0.7 to 0.8 MPa. Primary drying is performed with air or nitrogen, and the washing unit 30 first cleans the primary dried raw materials with caustic soda for 2 to 3 minutes under a pressure condition of 0.3 to 0.4 MPa, and the filter cloth pressing plate 15 Secondarily filters the slurry contained in the firstly washed raw materials for 50 to 60 seconds under a pressure condition of 0.3 to 0.4 MPa, and the drying unit 40 filters the secondarily filtered raw materials under a pressure condition of 0.7 to 0.8 MPa. Secondary drying is performed with air or nitrogen for 50 to 70 seconds, and the washing unit 30 secondarily washes the secondarily dried raw materials with pure water for 6 to 8 minutes under a pressure condition of 0.4 to 0.6 MPa. The temperature is set to 20 to 75°C during the secondary washing, and the filter cloth pressing plate 15 presses the slurry contained in the raw material washed secondarily by the washing unit 30 for 8 times under a pressure condition of 1.2 to 1.4 MPa. It is filtered three times for ~12 minutes, and the drying unit 40 dries the thirdly filtered raw material with air or nitrogen for 100 to 140 seconds under a pressure condition of 0.7 to 0.8 MPa, and the filter cloth 16 is After the third drying, it is characterized by a second cleaning treatment with pure water and air.

In addition, the controller 70 operates the twelfth ball valve PV12 and The second ball valve (PV2) is controlled to open and the tenth ball valve (PV10) is closed, and the controller (70) controls the filter cloth (16) accommodated in the air tank (45) during primary cleaning. The third ball valve (PV3) is opened and the fifteenth ball valve (PV15) is controlled to be closed so that air can be supplied to the filter cloth pressing plate 15, and the controller 70 controls the filter cloth 16 ) After the first cleaning, the first ball valve (PV1) is controlled to open so that the raw material contained in the raw material tank 10 can be supplied to the filter cloth pressing plate 15, and the controller 70 controls the first During filtering, the eighth ball valve (PV8) is controlled to be opened so that the pressed water contained in the pressed water tank 25 can be supplied to the filter cloth pressing plate 15, and the controller 70 is controlled to open during the first filtering. , the ninth ball valve (PV9) is controlled to open so that the pressed water that has passed through the filter cloth pressing plate (15) can be recovered into the pressed water tank (25), and the controller (70) operates during primary filtering, The fourth ball valve (PV4) and the sixth ball valve (PV6) are each opened so that the raw material that has passed through the filter cloth pressing plate (15) can be recovered into the raw material tank (10), and the fifth ball valve ( PV5) is controlled to be closed, and the controller 70 closes the fifteenth ball valve (PV15) so that air or nitrogen contained in the air tank 45 can be supplied to the drying unit 40 during primary drying. is opened and the third ball valve (PV3) is controlled to be closed, and the controller 70 controls the caustic soda contained in the caustic soda tank 35 to be supplied to the cleaning unit 30 during the first washing. The 11th ball valve (PV11) and the 10th valve are respectively controlled to open and the 12th ball valve (PV12) is controlled to close.

In addition, during secondary filtering, the controller 70 controls the eighth ball valve PV8 to be opened so that the pressed water contained in the pressed water tank 25 can be supplied to the filter cloth pressing plate 15, During secondary drying, the controller 70 opens the fifteenth ball valve (PV15) so that the air or nitrogen contained in the air tank 45 can be supplied to the drying unit 40, and the third ball valve The valve PV3 is controlled to be closed, and the controller 70 closes the twelfth ball valve PV12 so that the pure water contained in the washing water tank 50 can be supplied to the washing unit 30 during secondary washing. ) and the 10th valve are controlled to open and the 11th ball valve (PV11) is closed, respectively, and the controller 70 controls the PH concentration of the wastewater measured by the second meter 67 after the secondary washing. And, if the ionic conductivity falls within a preset standard PH concentration range and a standard ionic conductivity range, respectively, it is determined that the secondary cleaning is complete.

In addition, during the third filtering, the controller 70 controls the eighth ball valve PV8 to be opened so that the pressed water contained in the pressed water tank 25 can be supplied to the filter cloth pressing plate 15, During the third drying, the controller 70 opens the fifteenth ball valve (PV15) so that the air or nitrogen contained in the air tank 45 can be supplied to the drying unit 40, and the third ball valve The valve PV3 is controlled to be closed, and the controller 70 is configured to supply the pure water contained in the washing water tank 50 to the filter cloth pressing plate 15 during secondary cleaning of the filter cloth 16. The twelfth ball valve (PV12) and the second ball valve (PV2) are controlled to open and the tenth ball valve (PV10) is closed, respectively, and the controller (70) performs secondary cleaning of the filter cloth (16), The third ball valve (PV3) is opened and the fifteenth Q ball valve (PV15) is controlled to be closed so that the air contained in the air tank (45) can be supplied to the filter cloth pressing plate (15). Do it as

The method of cleaning precursors for vertical filter press secondary batteries according to the present invention includes a first step of checking air, nitrogen, caustic soda, pure water, and pressed water in advance, a second step of opening the filter cloth pressing plate 15, and a second step of opening the filter cloth press plate 15. A third step in which (16) is first cleaned with pure water and air, a fourth step in which the filter cloth pressing plate 15 is closed, and the raw material contained in the raw material tank 10 is transferred to the filter cloth pressing plate 15. A sixth step, a drying section, in which the filter cloth pressing plate 15 first filters the slurry contained in the raw materials supplied in the fifth step for 45 to 55 seconds under a pressure condition of 0.3 to 0.4 MPa. (40) is the seventh step of first drying the raw material filtered in the sixth step with air or nitrogen for 30 to 60 seconds under a pressure condition of 0.7 to 0.8 MPa, and the washing unit 30 is the seventh step. In the 8th step, the first dried raw material is first washed with caustic soda for 2 to 3 minutes under a pressure of 0.3 to 0.4 MPa, and the filter cloth pressing plate 15 is applied to the firstly washed raw material in the 8th step. A ninth step of secondarily filtering the contained slurry for 50 to 60 seconds under a pressure condition of 0.3 to 0.4 MPa, and the drying unit 40 filters the raw material secondarily filtered in the ninth step under a pressure condition of 0.7 to 0.8 MPa. A 10th step of secondarily drying with air or nitrogen for 50 to 70 seconds, the washing unit 30 dries the raw material secondarily dried in the 10th step with pure water for 6 to 8 minutes at a pressure of 0.4 to 0.6 MPa. In the 11th step of second washing, the filter cloth pressing plate 15 thirdly filters the slurry contained in the raw material washed secondarily in the 11th step for 8 to 12 minutes under a pressure condition of 1.2 to 1.4 MPa. Step 12, the drying unit 40 dries the raw material filtered thirdly in the twelfth step with air or nitrogen for 100 to 140 seconds under a pressure condition of 0.7 to 0.8 MPa, third step, the filter cloth pressing plate. It includes a 14th step in which (15) is opened and a 15th step in which the filter cloth 16 is secondarily cleaned with pure water and air, and in the 11th step, the temperature of the pure water is set to 20 to 75 ° C. It is characterized by being

In addition, in the third step, the controller 70 operates the twelfth ball valve (PV12) and the second ball valve (PV2) so that the pure water contained in the washing water tank (50) can be supplied to the filter cloth pressing plate (15). Step 3-1, which controls each to open and close the tenth ball valve (PV10), and the controller (70) controls the air contained in the air tank (45) to be supplied to the filter cloth pressing plate (15). It includes a 3-2 step of controlling the 3 ball valve (PV3) to open and the 15th ball valve (PV15) to close, and the 5th step is to control the raw material and pure water in the raw material tank 10 to be preset. In step 5-1 of mixing after each input at a standard ratio, the controller 70 uses a first ball valve (PV1) so that the raw materials contained in the raw material tank 10 can be supplied to the filter cloth pressing plate 15. A 5-2 step is controlled to open and a 5-3 step in which the pump unit 20 supplies the raw material contained in the raw material tank 10 to the filter cloth pressing plate 15, and the 6th step A 6-1 step in which the controller 70 controls the eighth ball valve PV8 to be opened so that the pressed water contained in the pressed water tank 25 can be supplied to the filter cloth pressing plate 15, the controller ( A 6-2 step in which 70) controls the ninth ball valve (PV9) to be opened so that the pressed water that has passed through the filter cloth pressing plate (15) can be recovered into the pressed water tank (25) and the controller (70) The fourth ball valve (PV4) and the sixth ball valve (PV6) are each opened so that the raw material that has passed through the filter cloth pressing plate (15) can be recovered into the raw material tank (10), and the fifth ball valve (PV5) ) includes a 6-3 step of controlling to close, and the 7th step is to control the controller 70 to supply the air or nitrogen contained in the air tank 45 to the drying unit 40. 15 It includes a 7-1 step of controlling the ball valve (PV15) to open and the third ball valve (PV3) to close, and the 8th step is to control the controller 70 to open the caustic soda tank 35. The 8th control valve controls the 11th ball valve PV11 and the 10th ball valve PV10 to be opened and the 12th ball valve PV12 to be closed so that the contained caustic soda can be supplied to the washing unit 30. -Step 1, wherein the ninth step is to operate the eighth ball valve (PV8) so that the controller 70 can supply the pressed water contained in the pressed water tank 25 to the filter cloth pressing plate 15. In the 9-1st step of controlling to open, the controller 70 opens the ninth ball valve (PV9) so that the pressed water that has passed through the filter cloth pressing plate 15 can be recovered into the pressed water tank 25. In step 9-2, the controller 70 controls the fourth ball valve (PV4) and the sixth ball so that the raw material that has passed through the filter cloth pressing plate (15) can be recovered into the raw material tank (10). It includes a 9-3 step of controlling the valve PV6 to be opened and the fifth ball valve PV5 to be closed, and the 10th step is to control the controller 70 to be stored in the air tank 45. A step 10-1 of controlling the fifteenth ball valve (PV15) to be opened and the third ball valve (PV3) to be closed so that air or nitrogen can be supplied to the drying unit (40), In the 11th step, the controller 70 opens the 12th ball valve PV12 and the 10th valve, respectively, so that the pure water contained in the washing water tank 50 can be supplied to the washing unit 30, and the Step 11-1 of controlling the 11th ball valve (PV11) to close, and the controller 70 determines the pH concentration and ion conductivity of the wastewater measured by the second measuring device 67 in a preset reference PH concentration section and If each falls within the standard ion conductivity range, it includes a step 11-2 of determining that the secondary washing is completed, and the twelfth step is a step where the controller 70 determines that the pressed water contained in the pressed water tank 25 is the filter cloth. In the 12-1 step of controlling the eighth ball valve (PV8) to be opened so that it can be supplied to the pressing plate 15, the controller 70 determines that the pressed water that has passed through the filter cloth pressing plate 15 is the pressed water. Step 12-2 of controlling the ninth ball valve (PV9) to be opened so that it can be returned to the tank 25, and the controller 70 controls the raw material that has passed through the filter cloth pressing plate 15 to be stored in the raw material tank ( A 12-3 step of controlling the fourth ball valve (PV4) and the sixth ball valve (PV6) to be opened and the fifth ball valve (PV5) to be closed so that they can be recovered by 10), In the 13th step, the controller 70 opens the 15th ball valve PV15 so that the air or nitrogen contained in the air tank 45 can be supplied to the drying unit 40, and the third ball valve PV15 is opened. It includes a 13-1 step of controlling the valve PV3 to be closed, and the 15th step is to control the controller 70 to supply the pure water contained in the washing water tank 50 to the filter cloth pressing plate 15. Step 15-1 of controlling the twelfth ball valve (PV12) and the second ball valve (PV2) to be opened and the tenth ball valve (PV10) to be closed, respectively, and the controller 70 to control the air Step 15-2 of controlling the third ball valve (PV3) to be opened and the fifteenth ball valve (PV15) to be closed so that the air contained in the tank (45) can be supplied to the filter cloth pressing plate (15). It is characterized by including.

The apparatus and method for cleaning precursors for vertical filter press secondary batteries according to the present invention include primary filtering using a filter plate pressing plate, primary drying using air or nitrogen, primary washing using caustic soda, and secondary filtering using a filter plate pressing plate. , the precursor, which is the basic material of the cathode material, can be sequentially washed through secondary drying with air or nitrogen, secondary washing with pure water, tertiary filtering with a filter plate compression plate, and tertiary drying with air or nitrogen. , It has the effect of cleaning the precursor cleanly and stably.

In addition, the precursor cleaning device and method for a vertical filter press secondary battery according to the present invention can recover the pressed water used in the filtering process and the caustic soda or pure water used in the washing process, respectively, so that the pressed water, caustic soda, and pure water can be recovered. It has the effect of reducing production costs by lowering usage.

In addition, the precursor cleaning device and method for a vertical filter press secondary battery according to the present invention include primary filtering, primary drying, primary washing, secondary filtering, secondary drying, secondary washing, tertiary filtering, and tertiary drying processes. can be carried out automatically, which has the effect of dramatically improving the productivity of the precursor.

1 is a configuration diagram of a vertical filter press precursor cleaning device for secondary batteries according to the present invention.
Figure 2 is a schematic diagram of a precursor washing device for a vertical filter press secondary battery according to the present invention.
Figure 3 is a flow chart for steps S100 to S800 in the vertical filter press precursor cleaning method according to the present invention.
Figure 4 is a flow chart for steps S900 to S1500 in the vertical filter press precursor cleaning method according to the present invention.

Figure 1 is a configuration diagram of a precursor cleaning device 5 for a vertical filter press secondary battery according to the present invention.

Referring to Figure 1, the vertical filter press secondary battery precursor washing device 5 according to the present invention includes a raw material tank 10, a vertical filter press 11, a filter cloth pressing plate 15, a pump unit 20, and a pressing unit. Water tank 25, washing unit 30, caustic soda tank 35, drying unit 40, air tank 45, washing water tank 50, hot and cold conditioner 55 (not shown), and air compressor It consists of (60) (not shown).

First, raw materials are accommodated in the raw material tank 10. At this time, at least one raw material tank 10 may be provided.

And, the vertical filter press 11 is connected to the raw material tank 10, and raw materials are supplied from the raw material tank 10.

In addition, the filter cloth pressing plate 15 is provided inside the vertical filter press 11 to filter the slurry contained in the raw material supplied from the raw material tank 10.

In addition, the pump unit 20 is provided between the raw material tank 10 and the filter cloth pressing plate 15, and supplies the raw material contained in the raw material tank 10 to the filter cloth pressing plate 15.

In addition, the pressed water tank 25 is connected to the filter cloth pressing plate 15 and supplies pressed water for pressing the slurry to the filter cloth pressing plate 15.

In addition, the drying unit 40 is provided on the other side of the filter cloth pressing plate 15, and dries the raw material filtered by the filter cloth pressing plate 15 with air or nitrogen.

Additionally, the air tank 45 is connected to the drying unit 40 and supplies air for drying raw materials to the drying unit 40.

In addition, the washing unit 30 is provided between the filter cloth pressing plate 15 and the drying unit 40 to filter the raw materials filtered by the filter cloth pressing plate 15 or dried by the drying unit 40. Wash the raw materials.

In addition, the caustic soda tank 35 is connected to the washing unit 30 and supplies caustic soda for washing raw materials to the washing unit 30. At this time, caustic soda refers to sodium hydroxide (NaOH), an alkaline substance that is a colorless, odorless, transparent liquid.

Additionally, the washing water tank 50 is provided on the other side of the caustic soda tank 35 and is connected to the washing unit 30 to supply pure water for washing raw materials to the washing unit 30.

In addition, the hot and cold conditioner 55 is connected to the raw material tank 10 and supplies cold air for cooling the raw material or warm air for heating the raw material to the raw material tank 10.

And, the air compressor 60 is connected to the air tank 45 and supplies air or nitrogen to the air tank 45.

Meanwhile, the washing water tank 50 may have a constant temperature function that can maintain the temperature of pure water at a constant level.

In addition, the filter cloth pressing plate 15 may be configured to include a filter cloth 16, which is a fiber for filtering the slurry suspended in the raw material.

Meanwhile, the vertical filter press secondary battery precursor washing device 5 according to the present invention includes a first raw material supply line (A1), a second raw material supply line (A2), a first raw material discharge line (A3), and a compressed water supply line. (B1), compressed water recovery line (B2), caustic soda supply line (C1), washing water supply line (C2), first washing water supply line (C3), second washing water supply line (C4), first air supply It further includes a line (E1) and a second air supply line (E2).

First, the first raw material supply line (A1) is connected to the output side of the raw material tank 10 and the input side of the pump unit 20, so that the raw material discharged from the raw material tank 10 is supplied to the pump unit 20. It becomes a passageway for movement.

In addition, the second raw material supply line (A2) is connected to the output side of the pump unit 20 and the input side of the filter cloth pressing plate 15, so that the raw material discharged from the pump unit 20 is connected to the filter cloth pressing plate 15. It becomes a passageway to move to.

In addition, the first raw material discharge line (A3) is connected to the output side of the filter cloth pressing plate 15 and the input side of the raw material tank 10, so that the raw material discharged from the filter cloth pressing plate 15 is supplied to the raw material tank 10. ) becomes a passageway to

In addition, the pressed water supply line (B1) is connected to the output side of the pressed water tank 25 and the filter cloth pressing plate 15, respectively, so that the pressed water discharged from the pressed water tank 25 is supplied to the filter cloth pressing plate 15. It becomes a passageway.

In addition, the pressed water recovery line (B2) is connected to the input side of the filter cloth pressing plate 15 and the pressed water tank 25, respectively, so that the pressed water discharged from the filter cloth pressing plate 15 is recovered into the pressed water tank 25. It becomes a passageway.

Additionally, the caustic soda supply line C1 is connected to the output side of the caustic soda tank 35 and becomes a passage through which the caustic soda discharged from the caustic soda tank 35 moves.

Additionally, the washing water supply line C2 is connected to the output side of the washing water tank 50 and becomes a passage through which the washing water discharged from the washing water tank 50 moves.

In addition, the first washing water supply line (C3) is connected to the caustic soda supply line (C1), the washing water supply line (C2), and the input side of the washing unit 30, respectively, and passes through the caustic soda supply line (C1). It becomes a passage through which caustic soda or washing water passing through the washing water supply line (C2) moves to the washing unit (30).

In addition, the second washing water supply line (C4) is connected to the first washing water supply line (C3) and the input side of the filter cloth pressing plate (15), respectively, so that the caustic soda or washing water passing through the first washing water supply line (C3) It becomes a passage through which water moves to the input side of the filter cloth pressing plate (15).

In addition, the first air supply line (E1) is connected to the output side of the air tank 45 and the input side of the drying unit 40, so that the air discharged from the air tank 45 flows to the drying unit 40. It becomes a passageway for movement.

In addition, the second air supply line (E2) is connected to the output side of the air tank 45 and the input side of the filter cloth pressing plate 15, so that the air discharged from the air tank 45 is connected to the filter cloth pressing plate 15. ) becomes a passageway to

Meanwhile, the vertical filter press secondary battery precursor cleaning device 5 according to the present invention includes a first ball valve (PV1), a second ball valve (PV2), a third ball valve (PV3), and a fourth ball valve (PV4). , the 6th ball valve (PV6), the 8th ball valve (PV8), the 9th ball valve (PV9), the 10th ball valve (PV10), the 11th ball valve (PV11), the 12th ball valve (PV12), and the 15th ball valve. It further includes a ball valve (PV15).

First, the first ball valve PV1 is provided on the second raw material supply line A2 and is configured to be open and closed.

Additionally, the second ball valve PV2 is provided on the second washing water supply line C4 and is configured to be open and closed.

Additionally, the third ball valve PV3 is provided on the second air supply line E2 and is configured to be open and closed.

In addition, the fourth ball valve PV4 is provided on the first raw material discharge line A3 to be spaced apart from the output side of the filter cloth pressing plate 15 and is configured to be open and closed.

In addition, the sixth ball valve PV6 is provided on the first raw material discharge line A3 to be spaced apart from the input side of the raw material tank 10 and is configured to be open and closed.

In addition, the eighth ball valve (PV8) is provided on the pressed water supply line (B1) to be spaced apart from the filter cloth pressing plate (15) and is configured to be open and closed.

In addition, the ninth ball valve (PV9) is provided on the compressed water recovery line (B2) and is configured to be open and closed.

Additionally, the tenth ball valve (PV10) is provided on the first washing water supply line (C3) and is configured to be open and closed.

And, the 11th ball valve (PV11) is provided on the caustic soda supply line (C1) and is configured to be open and close.

Additionally, the twelfth ball valve PV12 is provided on the cleaning water supply line C2 and is configured to be open and closed.

Additionally, the fifteenth ball valve (PV15) is provided on the first air supply line (E1) and is configured to be open and closed.

Additionally, the controller 70 controls the opening and closing of each ball valve.

On the other hand, the vertical filter press secondary battery precursor cleaning device 5 according to the present invention includes a wastewater tank 65, a first wastewater discharge line (D1), a second wastewater discharge line (D2), and a third wastewater discharge line (D3). ), 1st air discharge line (E3), 5th ball valve (PV5), 13th ball valve (PV13), 14th ball valve (PV14), 1st measuring instrument (66), 2nd measuring instrument (67) and the nose It may further include a separator 68.

First, the wastewater tank 65 is connected to the washing unit 30 to accommodate the wastewater discharged from the washing unit 30.

In addition, the first wastewater discharge line (D1) is connected to the input side of the washing unit 30 and the wastewater tank 65, respectively, so that the wastewater discharged from the washing unit 30 moves to the wastewater tank 65. It becomes a passage.

And, the second wastewater discharge line (D2) is connected to the first raw material discharge line (A3) and the first wastewater discharge line (D1), respectively, so that the wastewater discharged from the first raw material discharge line discharges the first wastewater. It becomes a passage to the line (D1).

And, the third wastewater discharge line (D3) is connected to the second raw material supply line (A2) and the first wastewater discharge line (D1), respectively, so that the wastewater discharged from the second raw material supply line (A2) is connected to the second raw material supply line (A2). 1 It becomes a passage to the wastewater discharge line (D1).

In addition, the first air discharge line (E3) is connected to the second wastewater discharge line (D2) and becomes a passage through which air passing through the second wastewater discharge line (D2) is discharged to the outside.

Additionally, the fifth ball valve (PV5) is provided on the second wastewater discharge line (D2) and is configured to be open and closed.

Additionally, the thirteenth ball valve (PV13) is provided on the first air discharge line (E3) and is configured to be open and closed.

In addition, the fourteenth ball valve (PV14) is provided on the third wastewater discharge line (D3) and is configured to be open and closed.

In addition, the first measuring instrument 66 is provided on the first raw material discharge line (A3) and measures the turbidity and refraction of the raw material moving through the first raw material discharge line (A3), respectively.

In addition, the second measuring device 67 is provided on the second wastewater discharge line (D2) and measures the PH concentration and ionic conductivity of the wastewater moving through the second wastewater discharge line (D2), respectively.

In addition, the water separator 68 is provided on the first air discharge line (E3) to remove moisture contained in the air passing through the first air discharge line (E3) and the moisture contained in the air passing through the first air discharge line (E3). Remove each water film present on the inner wall.

Figure 2 is a schematic diagram of a precursor washing device 5 for a vertical filter press secondary battery according to the present invention.

Referring to Figure 2, air, nitrogen, caustic soda, pure water, and compressed water are each checked in advance.

After that, the filter cloth pressing plate 15 is opened.

After that, the filter cloth 16 is first cleaned with pure water and air.

After the filter cloth pressing plate 15 is first cleaned, the filter cloth pressing plate 15 is closed.

Thereafter, in the raw material tank 10, after the filter cloth 16 is first cleaned, the raw materials and pure water are respectively added at a preset standard ratio and then mixed. At this time, the reference ratio may change depending on the type of precursor. Here, the waste water is discharged to the waste water tank (65).

And, the pump unit 20 supplies the raw material contained in the raw material tank 10 to the filter cloth pressing plate 15. At this time, the circulation time of the raw material by the pump unit 20 may be determined by a timer or a turbidity meter.

In addition, the filter cloth pressing plate 15 primarily filters the slurry contained in the raw material supplied from the raw material tank 10 for 45 to 55 seconds under a pressure condition of 0.3 to 0.4 MPa. At this time, wastewater is discharged to the wastewater tank 65.

In addition, the drying unit 40 first dries the primarily filtered raw materials with air or nitrogen for 30 to 60 seconds under a pressure condition of 0.7 to 0.8 MPa. At this time, air or nitrogen is discharged through the water separator (68).

In addition, the washing unit 30 first cleans the dried raw materials with caustic soda for 2 to 3 minutes under a pressure condition of 0.3 to 0.4 MPa. At this time, wastewater is discharged to the wastewater tank 65.

In addition, the filter cloth pressing plate 15 secondarily filters the slurry contained in the firstly washed raw materials for 50 to 60 seconds under a pressure condition of 0.3 to 0.4 MPa. At this time, wastewater is discharged to the wastewater tank 65.

In addition, the drying unit 40 secondarily dries the secondarily filtered raw materials with air or nitrogen for 50 to 70 seconds under a pressure condition of 0.7 to 0.8 MPa. At this time, air or nitrogen is discharged through the water separator (68).

In addition, the washing unit 30 washes the secondarily dried raw materials with pure water for 6 to 8 minutes under a pressure condition of 0.4 to 0.6 MPa. At this time, wastewater is discharged to the wastewater tank 65.

In addition, whether the secondary washing by the washing unit 30 is completed can be determined through the PH concentration and ionic conductivity of the wastewater measured by the second measuring device 67. During secondary washing, the temperature of the pure water is set to 20-75°C.

In addition, the filter cloth pressing plate 15 thirdly filters the slurry contained in the raw material washed secondarily by the washing unit 30 for 8 to 12 minutes under a pressure condition of 1.2 to 1.4 MPa. At this time, wastewater is discharged to the wastewater tank 65.

In addition, the drying unit 40 dries the thirdly filtered raw material three times with air or nitrogen for 100 to 140 seconds under a pressure condition of 0.7 to 0.8 MPa. At this time, air or nitrogen is discharged through the water separator (68).

And, the filter cloth pressing plate 15 is opened after the third drying.

And, after the filter cloth 16 is dried a third time, it is cleaned a second time with pure water and air. At this time, wastewater is discharged to the wastewater tank 65.

Meanwhile, the controller 70 operates the twelfth ball valve PV12 and The second ball valve (PV2) is controlled to be opened and the tenth ball valve (PV10) is controlled to be closed.

In addition, during primary cleaning of the filter cloth 16, the controller 70 opens the third ball valve PV3 so that the air contained in the air tank 45 can be supplied to the filter cloth pressing plate 15. and the fifteenth ball valve (PV15) is controlled to close.

In addition, after the first cleaning of the filter cloth 16, the controller 70 opens the first ball valve PV1 so that the raw material contained in the raw material tank 10 can be supplied to the filter cloth pressing plate 15. Control as much as possible.

Also, during primary filtering, the controller 70 controls the eighth ball valve PV8 to be opened so that the pressed water contained in the pressed water tank 25 can be supplied to the filter cloth pressing plate 15.

Also, during primary filtering, the controller 70 controls the ninth ball valve PV9 to be opened so that the pressed water that has passed through the filter cloth pressing plate 15 can be returned to the pressed water tank 25. .

In addition, the controller 70 operates the fourth ball valve (PV4) and the sixth ball valve (PV4) so that the raw material that has passed through the filter cloth pressing plate (15) can be recovered to the raw material tank (10) during primary filtering. PV6) is controlled to open and the fifth ball valve PV5 is controlled to close.

In addition, during primary drying, the controller 70 opens the 15th ball valve PV15 so that the air or nitrogen contained in the air tank 45 can be supplied to the drying unit 40, and 3 Control the ball valve (PV3) to close.

In addition, the controller 70 operates the 11th ball valve PV11 and the 10th valve, respectively, so that the caustic soda contained in the caustic soda tank 35 can be supplied to the cleaning unit 30 during the first cleaning. It is opened, and the twelfth ball valve (PV12) is controlled to be closed.

Also, during secondary filtering, the controller 70 controls the eighth ball valve PV8 to be opened so that the pressed water contained in the pressed water tank 25 can be supplied to the filter cloth pressing plate 15.

In addition, during secondary filtering, the controller 70 controls the ninth ball valve PV9 to be opened so that the pressed water that has passed through the filter cloth pressing plate 15 can be recovered into the pressed water tank 25. .

In addition, the controller 70 operates the fourth ball valve (PV4) and the sixth ball valve (PV4) so that the raw material that has passed through the filter cloth pressing plate (15) can be recovered to the raw material tank (10) during secondary filtering. PV6) is controlled to open and the fifth ball valve PV5 is controlled to close.

In addition, during secondary drying, the controller 70 opens the fifteenth ball valve PV15 so that the air or nitrogen contained in the air tank 45 can be supplied to the drying unit 40, and the 3 Control the ball valve (PV3) to close.

In addition, during secondary washing, the controller 70 opens the twelfth ball valve (PV12) and the tenth valve, respectively, so that the pure water contained in the washing water tank 50 can be supplied to the washing unit 30. And the 11th ball valve (PV11) is controlled to close.

Meanwhile, the controller 70 performs 2 if the PH concentration and ion conductivity of the wastewater measured by the second measuring device 67 fall within the preset standard PH concentration range and standard ion conductivity range, respectively, after the secondary washing. It is judged that the car washing is complete.

In addition, during the third filtering, the controller 70 controls the eighth ball valve PV8 to be opened so that the pressed water contained in the pressed water tank 25 can be supplied to the filter cloth pressing plate 15.

In addition, the controller 70 controls the ninth ball valve PV9 to be opened so that the pressed water that has passed through the filter cloth pressing plate 15 can be recovered into the pressed water tank 25 during the third filtering. .

In addition, the controller 70 operates the fourth ball valve (PV4) and the sixth ball valve (PV4) so that the raw material that has passed through the filter cloth pressing plate (15) can be recovered to the raw material tank (10) during the third filtering. PV6) is controlled to open and the fifth ball valve PV5 is controlled to close.

In addition, during the third drying, the controller 70 opens the fifteenth ball valve PV15 so that the air or nitrogen contained in the air tank 45 can be supplied to the drying unit 40, and the 3 Control the ball valve (PV3) to close.

In addition, the controller 70 operates the twelfth ball valve PV12 and The second ball valve (PV2) is controlled to be opened and the tenth ball valve (PV10) is controlled to be closed.

In addition, the controller 70 opens the third ball valve PV3 so that the air contained in the air tank 45 can be supplied to the filter cloth pressing plate 15 during secondary cleaning of the filter cloth 16. and the fifteenth ball valve (PV15) is controlled to close.

Meanwhile, the method of cleaning the precursor for the vertical filter press 11 secondary battery according to the present invention is as follows.

Figure 3 is a flowchart for steps S100 to S800 in the method of washing precursors for a vertical filter press 11 secondary battery according to the present invention.

Referring to Figure 3, air, nitrogen, caustic soda, pure water, and compressed water are each checked in advance (S100).

After that, the filter cloth pressing plate 15 is opened (S200).

Afterwards, the filter cloth 16 is first cleaned with pure water and air (S300).

After that, the filter cloth pressing plate 15 is closed (S400).

After that, the raw material contained in the raw material tank 10 is supplied to the filter cloth pressing plate 15 (S500).

After that, the filter cloth pressing plate 15 first filters the slurry contained in the supplied raw material for 45 to 55 seconds under a pressure condition of 0.3 to 0.4 MPa (S600).

At this time, wastewater is discharged to the wastewater tank 65.

After that, the drying unit 40 first dries the raw material filtered in step S600 with air or nitrogen for 30 to 60 seconds under a pressure condition of 0.7 to 0.8 MPa. (S700) At this time, air or nitrogen is used. It is discharged through the water separator (68).

Afterwards, the washing unit 30 first cleans the raw material primarily dried in step S700 with caustic soda for 2 to 3 minutes under a pressure condition of 0.3 to 0.4 MPa (S800). At this time, the waste water is discharged into the waste water tank (S800). 65) is discharged.

Figure 4 is a flowchart for steps S900 to S1500 in the method for cleaning precursors for a vertical filter press 11 secondary battery according to the present invention.

Referring to FIG. 4, the filter cloth pressing plate 15 secondarily filters the slurry contained in the raw material washed first in step S800 for 50 to 60 seconds under a pressure condition of 0.3 to 0.4 MPa (S900). , the wastewater is discharged to the wastewater tank (65).

Afterwards, the drying unit 40 secondarily dries the raw material filtered secondarily in step S900 with air or nitrogen for 50 to 70 seconds under a pressure condition of 0.7 to 0.8 MPa. (S1000) At this time, air or nitrogen is used. is discharged through the water separator (68).

After that, the washing unit 30 washes the raw material secondarily dried in step S1000 with pure water for 6 to 8 minutes under a pressure condition of 0.4 to 0.6 MPa (S1100). At this time, the waste water is stored in the waste water tank (S1100). 65) is discharged. In addition, whether the secondary washing by the washing unit 30 is completed can be determined through the PH concentration and ionic conductivity of the wastewater measured by the second measuring device 67. During secondary washing, the temperature of the pure water is set to 20-75°C.

Afterwards, the filter cloth pressing plate 15 filters the slurry contained in the raw material washed secondarily in step S1100 a third time for 8 to 12 minutes under a pressure condition of 1.2 to 1.4 MPa. (S1200) At this time, the wastewater is It is discharged to the waste water tank (65).

Afterwards, the drying unit 40 dries the raw material filtered three times in step S1200 with air or nitrogen for 100 to 140 seconds under a pressure condition of 0.7 to 0.8 MPa. (S1300) At this time, air or nitrogen is used. is discharged through the water separator (68).

After that, the filter cloth pressing plate 15 is opened (S1400).

After that, the filter cloth 16 is cleaned twice with pure water and air (S1500). At this time, the wastewater is discharged to the wastewater tank 65.

Meanwhile, step S300 in which the filter cloth 16 is first cleaned is as follows.

First, the controller 70 opens the twelfth ball valve PV12 and the second ball valve PV2, respectively, so that the pure water contained in the washing water tank 50 can be supplied to the filter cloth pressing plate 15, and the twelfth ball valve PV12 and the second ball valve PV2 are opened, respectively. 10 Control the ball valve (PV10) to close. (S301)

Afterwards, the controller 70 opens the third ball valve PV3 and closes the fifteenth ball valve PV15 so that the air contained in the air tank 45 can be supplied to the filter cloth pressing plate 15. Control as much as possible. (S302)

Meanwhile, step S500 in which the raw material contained in the raw material tank 10 is supplied to the filter cloth pressing plate 15 is as follows.

First, in the raw material tank 10, raw materials and pure water are each added at a preset standard ratio and then mixed (S501). At this time, the standard ratio can be changed depending on the type of precursor. Here, the waste water is discharged to the waste water tank (65).

Afterwards, the controller 70 controls the first ball valve PV1 to be opened so that the raw material contained in the raw material tank 10 can be supplied to the filter cloth pressing plate 15 (S502).

After that, the pump unit 20 supplies the raw material contained in the raw material tank 10 to the filter cloth pressing plate 15 (S503). At this time, the circulation time of the raw material by the pump unit 20 is determined by a timer ( Timer) or turbidimeter.

Meanwhile, step S600 in which the filter cloth pressing plate 15 first filters the slurry contained in the raw materials is as follows.

First, the controller 70 controls the eighth ball valve PV8 to be opened so that the pressed water contained in the pressed water tank 25 can be supplied to the filter cloth pressing plate 15. (S601)

Afterwards, the controller 70 controls the ninth ball valve PV9 to be opened so that the pressed water that has passed through the filter cloth pressing plate 15 can be returned to the pressed water tank 25. (S602)

After that, the controller 70 opens the fourth ball valve (PV4) and the sixth ball valve (PV6), respectively, so that the raw material that has passed through the filter cloth pressing plate (15) can be recovered into the raw material tank (10). and the fifth ball valve (PV5) is controlled to close (S603).

Meanwhile, step S700 of the drying unit 40 and the filter cloth pressing plate 15 is as follows.

First, the controller 70 opens the 15th ball valve PV15 so that the air or nitrogen contained in the air tank 45 can be supplied to the drying unit 40, and the third ball valve PV3 ) is controlled to be closed (S701)

Meanwhile, step S800, in which the washing unit 30 first cleans the raw materials, is as follows.

First, the controller 70 opens the 11th ball valve PV11 and the 10th valve, respectively, so that the caustic soda contained in the caustic soda tank 35 can be supplied to the cleaning unit 30, and the 12th ball valve PV11 opens. Control the ball valve (PV12) to close (S801)

Meanwhile, step S900 in which the filter cloth pressing plate 15 secondarily filters the slurry contained in the raw materials is as follows.

First, the controller 70 controls the eighth ball valve PV8 to be opened so that the pressed water contained in the pressed water tank 25 can be supplied to the filter cloth pressing plate 15. (S901)

Afterwards, the controller 70 controls the ninth ball valve PV9 to be opened so that the pressed water that has passed through the filter cloth pressing plate 15 can be returned to the pressed water tank 25. (S902)

After that, the controller 70 operates the fourth ball valve (PV4) and the sixth ball valve (PV6) so that the raw material that has passed through the filter cloth pressing plate (15) can be recovered to the raw material tank (10). It is opened, and the fifth ball valve (PV5) is controlled to be closed (S903).

Meanwhile, step S1000, in which the drying unit 40 secondarily dries the raw materials, is as follows.

First, the controller 70 opens the 15th ball valve PV15 so that the air or nitrogen contained in the air tank 45 can be supplied to the drying unit 40, and the third ball valve PV3 ) is controlled to be closed. (S1001)

Meanwhile, step S1100, in which the washing unit 30 secondarily washes the raw materials, is as follows.

First, the controller 70 opens the twelfth ball valve (PV12) and the tenth valve, respectively, so that the pure water contained in the washing water tank 50 can be supplied to the washing unit 30, and the eleventh ball valve (PV12) is opened. Control the ball valve (PV11) to close. (S1101)

In addition, the controller 70 determines that the secondary cleaning is complete when the PH concentration and ionic conductivity of the wastewater measured by the second measuring device 67 fall within the preset standard PH concentration range and standard ionic conductivity range, respectively. (S1102)

Meanwhile, step S1200, in which the filter cloth pressing plate 15 thirdly filters the slurry contained in the raw materials, is as follows.

First, the controller 70 controls the eighth ball valve PV8 to be opened so that the pressed water contained in the pressed water tank 25 can be supplied to the filter cloth pressing plate 15. (S1201)

Afterwards, the controller 70 controls the ninth ball valve PV9 to be opened so that the pressed water that has passed through the filter cloth pressing plate 15 can be returned to the pressed water tank 25. (S1202)

After that, the controller 70 operates the fourth ball valve (PV4) and the sixth ball valve (PV6) so that the raw material that has passed through the filter cloth pressing plate (15) can be recovered to the raw material tank (10). It is opened and the fifth ball valve (PV5) is controlled to close (S1203).

Meanwhile, step S1300, in which the drying unit 40 dries the raw material three times, is as follows.

First, the controller 70 opens the 15th ball valve PV15 so that the air or nitrogen contained in the air tank 45 can be supplied to the drying unit 40, and the third ball valve PV3 ) is controlled to be closed. (S1301)

Meanwhile, step S1500 in which the filter cloth 16 is secondarily cleaned is as follows.

First, the controller 70 opens the twelfth ball valve PV12 and the second ball valve PV2, respectively, so that the pure water contained in the washing water tank 50 can be supplied to the filter cloth pressing plate 15. and the tenth ball valve (PV10) is controlled to close (S1501).

Afterwards, the controller 70 opens the third ball valve PV3 so that the air contained in the air tank 45 can be supplied to the filter cloth pressing plate 15, and the fifteenth ball valve PV15 ) is controlled to be closed (S1502)

The vertical filter press secondary battery precursor cleaning device (5) and method according to the present invention include primary filtering by a filter plate pressing plate, primary drying by air or nitrogen, primary washing by caustic soda, and filter plate pressing plate. Sequentially cleaning the precursor, which is the basic material of the cathode material, through secondary filtration, secondary drying with air or nitrogen, secondary washing with pure water, tertiary filtration using a filter plate compression plate, and tertiary drying with air or nitrogen. This has the effect of cleaning the precursor cleanly and stably.

In addition, the precursor washing device 5 and method for a vertical filter press secondary battery according to the present invention can recover the pressed water used in the filtering process, the caustic soda used in the washing process, or pure water, respectively, so that the pressed water and caustic soda It has the effect of reducing production costs by lowering the amount of pure water used.

In addition, the precursor cleaning device (5) and method for a vertical filter press secondary battery according to the present invention can be used for primary filtering, primary drying, primary washing, secondary filtering, secondary drying, secondary washing, tertiary filtering, 3 The tea drying process can be carried out automatically, which has the effect of dramatically improving the productivity of the precursor.

5: Vertical filter press secondary battery precursor washing device
10: Raw material tank 11: Vertical filter press
15: Filter cloth pressing plate 16: Filter cloth
20: pump unit 25: compressed water tank
30: Washing unit 35: Caustic soda tank
40: air drying unit 45: air tank
50: Washing water tank 55: Hot and cold conditioner
60: air compressor 65: waste water tank
66: first instrument 67: second instrument
68: Water separator 70: Controller
A1: First raw material supply line A2: Second raw material supply line
A3: First raw material discharge line B1: Pressed water supply line
B2: Pressed water recovery line C1: Caustic soda supply line
C2: Washing water supply line C3: First washing water supply line
C4: Second washing water supply line D1: First wastewater discharge line
D2: Second wastewater discharge line D3: Third wastewater discharge line
E1: 1st air supply line E2: 2nd air supply line
E3: 1st air discharge line PV1: 1st ball valve
PV2: 2nd ball valve PV3: 3rd ball valve
PV4: 4th ball valve PV5: 5th ball valve
PV6: 6th ball valve PV7: 7th ball valve
PV8: 8th ball valve PV9: 9th ball valve
PV10: No. 10 ball valve PV11: No. 11 ball valve
PV12: No. 12 ball valve PV13: No. 13 ball valve
PV14: No. 14 ball valve PV15: No. 15 ball valve

Claims (10)

A raw material tank (10) in which raw materials are accommodated;
A vertical filter press (11) connected to the raw material tank (10) and supplied with raw materials from the raw material tank (10);
A filter cloth pressing plate (15) provided inside the vertical filter press (11) to filter the slurry contained in the raw material supplied from the raw material tank (10);
A pump unit (20) provided between the raw material tank (10) and the filter cloth pressing plate (15) to supply the raw material contained in the raw material tank (10) to the filter cloth pressing plate (15);
A pressed water tank (25) connected to the filter cloth pressing plate (15) and supplying pressed water for pressing the slurry to the filter cloth pressing plate (15);
A drying unit 40 provided on the other side of the filter cloth pressing plate 15 to dry the raw material filtered by the filter cloth pressing plate 15 with air or nitrogen;
An air tank 45 connected to the drying unit 40 and supplying air or nitrogen for drying raw materials to the drying unit 40;
A washing unit 30 is provided between the filter cloth pressing plate 15 and the drying unit 40 and washes the raw materials filtered by the filter cloth pressing plate 15 or the raw materials dried by the drying unit 40. );
A caustic soda tank 35 connected to the washing unit 30 and supplying caustic soda for washing raw materials to the washing unit 30;
a washing water tank 50 provided on the other side of the caustic soda tank 35, connected to the washing unit 30, and supplying pure water for washing raw materials to the washing unit 30;
A cold/temperature conditioner (55) connected to the raw material tank (10) and supplying cold air for cooling the raw material or warm air for heating the raw material to the raw material tank (10); and
An air compressor 60 connected to the air tank 45 and supplying air or nitrogen to the air tank 45,
The washing water tank 50 has a constant temperature function that can maintain the temperature of pure water at a constant level,
The filter cloth pressing plate (15) is
A vertical filter press secondary battery precursor washing device comprising a filter cloth (16), which is a fiber for filtering the slurry suspended in the raw material. According to clause 1,
A first raw material supply line (A1) connected to the output side of the raw material tank 10 and the input side of the pump unit 20, respectively, through which the raw material discharged from the raw material tank 10 moves to the pump unit 20;
A second raw material supply line (A2) connected to the output side of the pump unit 20 and the input side of the filter cloth pressing plate 15, respectively, through which the raw material discharged from the pump unit 20 moves to the filter cloth pressing plate 15. ;
A first raw material discharge line (A3) is connected to the output side of the filter cloth pressing plate 15 and the input side of the raw material tank 10, respectively, and moves the raw material discharged from the filter cloth pressing plate 15 to the raw material tank 10. );
A pressed water supply line (B1) connected to the output side of the pressed water tank 25 and the filter cloth pressing plate 15, respectively, through which the pressed water discharged from the pressed water tank 25 is supplied to the filter cloth pressing plate 15;
A pressed water recovery line (B2) connected to the input side of the filter cloth pressing plate 15 and the pressed water tank 25, respectively, and recovering the pressed water discharged from the filter cloth pressing plate 15 to the pressed water tank 25;
A caustic soda supply line (C1) connected to the output side of the caustic soda tank 35, through which the caustic soda discharged from the caustic soda tank 35 moves;
a washing water supply line (C2) connected to the output side of the washing water tank 50, through which the washing water discharged from the washing water tank 50 moves;
The caustic soda supply line (C1), the cleaning water supply line (C2), and the input side of the washing unit 30 are each connected to each other, and the caustic soda or the cleaning water supply line (C2) passing through the caustic soda supply line (C1) ) a first washing water supply line (C3) through which the washing water passing through moves to the washing unit 30;
They are each connected to the input side of the first washing water supply line (C3) and the filter cloth pressing plate 15, so that caustic soda or washing water passing through the first washing water supply line (C3) is supplied to the input side of the filter cloth pressing plate 15. A moving second washing water supply line (C4);
A first air supply line (E1) connected to the output side of the air tank 45 and the input side of the drying unit 40, respectively, through which the air discharged from the air tank 45 moves to the drying unit 40; and
A second air supply line (E2) is connected to the output side of the air tank 45 and the input side of the filter cloth pressing plate 15, respectively, and moves the air discharged from the air tank 45 to the filter cloth pressing plate 15. ); Vertical filter press precursor washing device for secondary battery, characterized in that it further comprises. According to clause 1,
A first ball valve (PV1) provided on the second raw material supply line (A2) and configured to be open and closed;
A second ball valve (PV2) provided on the second washing water supply line (C4) and configured to be open and closed;
A third ball valve (PV3) provided on the second air supply line (E2) and configured to be open and closed;
a fourth ball valve (PV4) provided on the first raw material discharge line (A3) to be spaced apart from the output side of the filter cloth pressing plate (15) and configured to be open and closed;
a sixth ball valve (PV6) provided on the first raw material discharge line (A3) to be spaced apart from the input side of the raw material tank (10) and configured to be open and closed;
An eighth ball valve (PV8) is provided on the pressed water supply line (B1) to be spaced apart from the filter cloth pressing plate (15) and is configured to be open and closed;
A ninth ball valve (PV9) provided on the compressed water recovery line (B2) and configured to be open and closed;
A tenth ball valve (PV10) provided on the first washing water supply line (C3) and configured to be open and closed;
An 11th ball valve (PV11) provided on the caustic soda supply line (C1) and configured to be open and closed;
A twelfth ball valve (PV12) provided on the washing water supply line (C2) and configured to be open and closed;
A fifteenth ball valve (PV15) provided on the first air supply line (E1) and configured to be open and closed; and
A vertical filter press secondary battery precursor cleaning device further comprising a controller 70 that controls the opening and closing of a plurality of ball valves, respectively. According to clause 1,
A wastewater tank 65 connected to the washing unit 30 and containing wastewater discharged from the washing unit 30;
A first wastewater discharge line (D1) connected to the input side of the washing unit 30 and the wastewater tank 65, respectively, through which wastewater discharged from the washing unit 30 moves to the wastewater tank 65;
A second wastewater discharge is connected to the first raw material discharge line (A3) and the first wastewater discharge line (D1), respectively, so that the wastewater discharged from the first raw material discharge line moves to the first wastewater discharge line (D1). line(D2);
A second raw material supply line (A2) and the first wastewater discharge line (D1) are connected to each other, and the wastewater discharged from the second raw material supply line (A2) moves to the first wastewater discharge line (D1). 3 Wastewater discharge line (D3);
A first air discharge line (E3) connected to the second wastewater discharge line (D2), through which air passing through the second wastewater discharge line (D2) is discharged to the outside;
A fifth ball valve (PV5) provided on the second wastewater discharge line (D2) and configured to be open and closed;
A thirteenth ball valve (PV13) provided on the first air discharge line (E3) and configured to be open and closed;
A fourteenth ball valve (PV14) provided on the third wastewater discharge line (D3) and configured to be open and closed;
A first measuring device (66) provided on the first raw material discharge line (A3) to measure the turbidity and refractive index of the raw material moving through the first raw material discharge line (A3);
A second measuring device (67) provided on the second wastewater discharge line (D2) to measure the PH concentration and ionic conductivity of the wastewater moving through the second wastewater discharge line (D2), respectively; and
It is provided on the first air discharge line (E3) to remove moisture contained in the air passing through the first air discharge line (E3) and a water film present on the inner wall of the first air discharge line (E3). A vertical filter press secondary battery precursor washing device, further comprising a water separator (68). According to clause 1,
The filter cloth (16) is
First cleaned with pure water and air,
In the raw material tank 10
After the filter cloth 16 is first cleaned, the raw materials and pure water are respectively added at a preset standard ratio and then mixed,
The pump unit 20 is
Supplying the raw material contained in the raw material tank 10 to the filter cloth pressing plate 15,
The filter cloth pressing plate (15) is
The slurry contained in the raw materials supplied from the raw material tank 10 is first filtered for 45 to 55 seconds under a pressure condition of 0.3 to 0.4 MPa,
The drying unit 40 is
The first filtered raw materials are first dried with air or nitrogen for 30 to 60 seconds under a pressure condition of 0.7 to 0.8 MPa.
The washing unit 30 is
The dried raw materials are first washed with caustic soda for 2 to 3 minutes under a pressure of 0.3 to 0.4 MPa.
The filter cloth pressing plate (15) is
The slurry contained in the first washed raw materials is secondarily filtered for 50 to 60 seconds under a pressure condition of 0.3 to 0.4 MPa.
The drying unit 40 is
The secondarily filtered raw materials are secondarily dried with air or nitrogen for 50 to 70 seconds at a pressure of 0.7 to 0.8 MPa.
The washing unit 30 is
The secondarily dried raw materials are washed twice with pure water for 6 to 8 minutes at a pressure of 0.4 to 0.6 MPa.
The temperature of the pure water is
During the second washing, the temperature is set to 20~75℃,
The filter cloth pressing plate (15) is
The slurry contained in the raw materials washed secondarily by the washing unit 30 is filtered thirdly for 8 to 12 minutes under a pressure condition of 1.2 to 1.4 MPa,
The drying unit 40 is
The thirdly filtered raw material is dried three times with air or nitrogen for 100 to 140 seconds at a pressure of 0.7 to 0.8 MPa.
The filter cloth (16) is
A vertical filter press precursor cleaning device for secondary batteries, characterized in that it is cleaned twice with pure water and air after the third drying. According to clause 3,
The controller 70 is
During primary cleaning of the filter cloth (16), the twelfth ball valve (PV12) and the second ball valve (PV2) are operated so that the pure water contained in the washing water tank (50) can be supplied to the filter cloth pressing plate (15). Each is opened and the tenth ball valve (PV10) is controlled to be closed,
The controller 70 is
During the first cleaning of the filter cloth (16), the third ball valve (PV3) is opened so that the air contained in the air tank (45) can be supplied to the filter cloth pressing plate (15), and the fifteenth ball valve ( PV15) is controlled to be closed,
The controller 70 is
After the first cleaning of the filter cloth (16), the first ball valve (PV1) is controlled to be opened so that the raw material contained in the raw material tank (10) can be supplied to the filter cloth pressing plate (15),
The controller 70 is
During primary filtering, the eighth ball valve (PV8) is controlled to open so that the pressed water contained in the pressed water tank (25) can be supplied to the filter cloth pressing plate (15),
The controller 70 is
During primary filtering, the ninth ball valve (PV9) is controlled to open so that the pressed water that has passed through the filter cloth pressing plate (15) can be recovered into the pressed water tank (25),
The controller 70 is
During primary filtering, the fourth ball valve (PV4) and the sixth ball valve (PV6) are each opened so that the raw material that has passed through the filter cloth pressing plate (15) can be recovered into the raw material tank (10), and the fourth ball valve (PV4) and sixth ball valve (PV6) are respectively opened. 5 Control the ball valve (PV5) to close,
The controller 70 is
During primary drying, the 15th ball valve (PV15) is opened and the third ball valve (PV3) is closed so that the air or nitrogen contained in the air tank 45 can be supplied to the drying unit 40. Control as much as possible,
The controller 70 is
During the first cleaning, the 11th ball valve (PV11) and the 10th valve are each opened so that the caustic soda contained in the caustic soda tank 35 can be supplied to the cleaning unit 30, and the 12th ball valve A precursor cleaning device for a vertical filter press secondary battery, characterized in that (PV12) is controlled to be closed. According to clause 6,
The controller 70 is
During secondary filtering, the eighth ball valve (PV8) is controlled to open so that the pressed water contained in the pressed water tank (25) can be supplied to the filter cloth pressing plate (15),
The controller 70 is
During secondary drying, the fifteenth ball valve (PV15) is opened and the third ball valve (PV3) is closed so that the air or nitrogen contained in the air tank (45) can be supplied to the drying unit (40). Control as much as possible,
The controller 70 is
During the secondary washing, the 12th ball valve (PV12) and the 10th valve are each opened so that the pure water contained in the washing water tank 50 can be supplied to the washing unit 30, and the 11th ball valve (PV12) PV11) is controlled to be closed,
The controller 70 is
After the secondary cleaning, if the PH concentration and ionic conductivity of the wastewater measured by the second measuring device 67 fall within the preset standard PH concentration range and standard ionic conductivity range, respectively, the secondary cleaning is determined to be complete. A vertical filter press precursor cleaning device for secondary batteries. According to clause 7,
The controller 70 is
During the third filtering, the eighth ball valve (PV8) is controlled to open so that the pressed water contained in the pressed water tank (25) can be supplied to the filter cloth pressing plate (15),
The controller 70 is
During the third drying, the fifteenth ball valve (PV15) is opened and the third ball valve (PV3) is closed so that the air or nitrogen contained in the air tank (45) can be supplied to the drying unit (40). Control as much as possible,
The controller 70 is
During secondary cleaning of the filter cloth (16), the twelfth ball valve (PV12) and the second ball valve (PV2) are operated so that pure water contained in the washing water tank (50) can be supplied to the filter cloth pressing plate (15). Each is opened and the tenth ball valve (PV10) is controlled to be closed,
The controller 70 is
During secondary cleaning of the filter cloth (16), the third ball valve (PV3) is opened so that the air contained in the air tank (45) can be supplied to the filter cloth pressing plate (15), and the fifteenth ball valve ( A precursor cleaning device for a vertical filter press secondary battery, characterized in that PV15) is controlled to be closed. The first step of checking air, nitrogen, caustic soda, pure water, and compressed water in advance;
A second step in which the filter cloth pressing plate 15 is opened;
A third step in which the filter cloth 16 is first cleaned with pure water and air;
A fourth step in which the filter cloth pressing plate 15 is closed;
A fifth step in which the raw material contained in the raw material tank 10 is supplied to the filter cloth pressing plate 15;
A sixth step in which the filter cloth pressing plate 15 first filters the slurry contained in the raw materials supplied in the fifth step for 45 to 55 seconds under a pressure condition of 0.3 to 0.4 MPa;
A seventh step in which the drying unit 40 first dries the raw material primarily filtered in the sixth step with air or nitrogen for 30 to 60 seconds under a pressure condition of 0.7 to 0.8 MPa;
An eighth step in which the washing unit 30 first washes the raw material primarily dried in the seventh step with caustic soda for 2 to 3 minutes under a pressure condition of 0.3 to 0.4 MPa;
A ninth step in which the filter cloth pressing plate 15 secondarily filters the slurry contained in the raw material washed first in the eighth step for 50 to 60 seconds under a pressure condition of 0.3 to 0.4 MPa;
A tenth step in which the drying unit 40 secondarily dries the raw material filtered secondarily in the ninth step with air or nitrogen for 50 to 70 seconds under a pressure condition of 0.7 to 0.8 MPa;
An 11th step in which the washing unit 30 secondarily washes the raw materials secondarily dried in the 10th step with pure water for 6 to 8 minutes under a pressure condition of 0.4 to 0.6 MPa;
A twelfth step in which the filter cloth pressing plate (15) thirdly filters the slurry contained in the raw material washed secondarily in the eleventh step for 8 to 12 minutes under a pressure condition of 1.2 to 1.4 MPa;
A 13th step in which the drying unit 40 dries the raw material thirdly filtered in the 12th step with air or nitrogen for 100 to 140 seconds under a pressure condition of 0.7 to 0.8 MPa;
A 14th step in which the filter cloth pressing plate 15 is opened; and
A 15th step in which the filter cloth 16 is secondarily cleaned with pure water and air,
In the 11th step above,
A method of washing a precursor for a vertical filter press (11) secondary battery, characterized in that the temperature of the pure water is set to 20 to 75 ° C. According to clause 9,
The third step is
The controller 70 opens the 12th ball valve PV12 and the 2nd ball valve PV2, respectively, so that the pure water contained in the washing water tank 50 can be supplied to the filter cloth pressing plate 15, and the 10th ball valve Step 3-1 of controlling the valve (PV10) to close; and
The controller 70 controls the third ball valve PV3 to open and the fifteenth ball valve PV15 to close so that the air contained in the air tank 45 can be supplied to the filter cloth pressing plate 15. Including step 3-2;
The fifth step is
Step 5-1 in which raw materials and pure water are each added to the raw material tank 10 at a preset standard ratio and then mixed;
A 5-2 step in which the controller 70 controls the first ball valve PV1 to be opened so that the raw material contained in the raw material tank 10 can be supplied to the filter cloth pressing plate 15; and
It includes a 5-3 step in which the pump unit 20 supplies the raw material contained in the raw material tank 10 to the filter cloth pressing plate 15,
The sixth step is
A 6-1 step in which the controller 70 controls the eighth ball valve PV8 to be opened so that the pressed water contained in the pressed water tank 25 can be supplied to the filter cloth pressing plate 15;
A 6-2 step in which the controller (70) controls the ninth ball valve (PV9) to be opened so that the pressed water that has passed through the filter cloth pressing plate (15) can be recovered into the pressed water tank (25); and
The controller 70 opens the fourth ball valve PV4 and the sixth ball valve PV6, respectively, so that the raw material that has passed through the filter cloth pressing plate 15 can be recovered into the raw material tank 10. It includes a 6-3 step of controlling the ball valve PV5 to close,
The 7th step is
The controller 70 opens the fifteenth ball valve PV15 and closes the third ball valve PV3 so that air or nitrogen contained in the air tank 45 can be supplied to the drying unit 40. It includes a 7-1 step of controlling as much as possible,
The 8th step is
The controller 70 opens the 11th ball valve PV11 and the 10th ball valve PV10, respectively, so that the caustic soda contained in the caustic soda tank 35 can be supplied to the washing unit 30. It includes a step 8-1 of controlling the twelfth ball valve (PV12) to close,
The 9th step is
A 9-1 step in which the controller 70 controls the eighth ball valve PV8 to be opened so that the pressed water contained in the pressed water tank 25 can be supplied to the filter cloth pressing plate 15;
A 9-2 step in which the controller (70) controls the ninth ball valve (PV9) to be opened so that the pressed water that has passed through the filter cloth pressing plate (15) can be recovered into the pressed water tank (25); and
The controller 70 opens the fourth ball valve (PV4) and the sixth ball valve (PV6), respectively, so that the raw material that has passed through the filter cloth pressing plate (15) can be recovered into the raw material tank (10), It includes a 9-3 step of controlling the fifth ball valve (PV5) to close,
The 10th step is
The controller 70 opens the fifteenth ball valve (PV15) so that the air or nitrogen contained in the air tank (45) can be supplied to the drying unit (40), and the third ball valve (PV3) opens. It includes a 10-1 step of controlling to close,
The 11th step is
The controller 70 opens the twelfth ball valve (PV12) and the tenth valve, respectively, so that the pure water contained in the washing water tank 50 can be supplied to the washing unit 30, and the eleventh ball valve Step 11-1 of controlling (PV11) to be closed; and
The controller 70 determines that the secondary cleaning is complete when the PH concentration and ionic conductivity of the wastewater measured by the second meter 67 fall within the preset standard PH concentration range and standard ionic conductivity range, respectively. Including step 11-2;
The 12th step is
A 12-1 step in which the controller (70) controls the eighth ball valve (PV8) to be opened so that the pressed water contained in the pressed water tank (25) can be supplied to the filter cloth pressing plate (15);
A 12-2 step in which the controller (70) controls the ninth ball valve (PV9) to be opened so that the pressed water that has passed through the filter cloth pressing plate (15) can be recovered into the pressed water tank (25); and
The controller 70 opens the fourth ball valve (PV4) and the sixth ball valve (PV6), respectively, so that the raw material that has passed through the filter cloth pressing plate (15) can be recovered into the raw material tank (10), A 12-3 step of controlling the fifth ball valve (PV5) to close,
The 13th step is
The controller 70 opens the fifteenth ball valve (PV15) so that the air or nitrogen contained in the air tank (45) can be supplied to the drying unit (40), and the third ball valve (PV3) opens. It includes a 13-1 step of controlling it to be closed,
The 15th step is
The controller 70 opens the twelfth ball valve PV12 and the second ball valve PV2, respectively, so that pure water contained in the washing water tank 50 can be supplied to the filter cloth pressing plate 15, Step 15-1 of controlling the tenth ball valve (PV10) to close; and
The controller 70 opens the third ball valve PV3 and closes the fifteenth ball valve PV15 so that the air contained in the air tank 45 can be supplied to the filter cloth pressing plate 15. A method of cleaning a precursor for a vertical filter press (11) secondary battery, comprising a step 15-2 of controlling the control to be possible.