A coating machine NMP recovery device

Abstract

The utility model provides a kind of coating machine NMP recovery equipment, it is related to NMP solution recovery technical field, the coating machine NMP recovery equipment, including recovery tank, the inside fixedly connected with mounting bracket of recovery tank, the inside fixedly connected with activated carbon adsorption net of mounting bracket, this coating machine NMP recovery equipment is sent waste gas to recovery tank by air inlet pipe, NMP in waste gas is absorbed by activated carbon adsorption net, first water pump is started by controller, and cold water is sent to water pipe and shower head, cold water is sprayed by shower head, NMP in waste gas and activated carbon adsorption net is adsorbed, NMP is brought into the bottom of recovery tank, residual waste gas is sent to gas-liquid separator and is gas-liquid separated by first gas pipe, second water pump is started, and the liquid containing NMP in recovery tank and the liquid separated in gas-liquid separator are sent to distiller, distiller is started, and water is evaporated, to obtain NMP solution, improve recovery efficiency.

Description

Technical Field

[0001] This utility model relates to a recycling device, specifically an NMP recycling device for a coating machine, belonging to the field of NMP solution recycling technology. Background Technology

[0002] NMP is a polar solvent used in lithium battery production to dissolve or swell PVDE and to dilute slurry. During the manufacturing process of lithium battery electrodes, the coating machine generates high-temperature NMP waste gas. Solvents such as water are usually used to purify the waste gas by absorbing the harmful NMP in the waste gas, thereby meeting the emission standards.

[0003] Chinese patent publication number "CN220071204U" discloses "An NMP recovery device for a coating machine". This application includes: a cooling pool, one end of which is connected to a gas-liquid separator, and the upper end of one side of the gas-liquid separator is connected to a connecting gas pipe. When high-temperature exhaust gas enters the cooling pool, it will be cooled by the water in the cooling pool.

[0004] This patent relies solely on cold water in a cooling pool to recover NMP from the exhaust gas. However, the high-temperature gas accumulates above the cooling pool, resulting in a limited contact area with the cold water. This leads to low NMP adsorption and recovery efficiency and requires a large amount of water, further reducing the recovery efficiency.

[0005] Therefore, a coating machine NMP recovery device is proposed here. Utility Model Content

[0006] The purpose of this invention is to provide a coating machine NMP recovery device to solve the above-mentioned problems, thereby addressing the issue of low adsorption and recovery efficiency of NMP in the prior art.

[0007] This utility model is achieved through the following technical solution: a coating machine NMP recovery device.

[0008] Preferably, the device includes a recycling bin, an installation frame is fixedly connected to the inner side of the recycling bin, an activated carbon adsorption mesh is fixedly connected to the inner side of the installation frame, and a guide plate is fixedly connected to the inner side of the recycling bin.

[0009] Preferably, a partition is fixedly connected to the inner side of the recycling bin, a through groove is opened on the inner side of the partition, a nozzle is fixedly connected to the inner side of the through groove, and a water pipe is fixedly connected to the top of the nozzle.

[0010] Preferably, a gas-liquid separator is provided on the right side of the recovery box. A three-way valve is fixedly connected to the output end of the gas-liquid separator. A recovery pipe is fixedly connected to the output end of the three-way valve. A second water pump is fixedly connected to the end of the recovery pipe. A distiller is provided in front of the second water pump. The output end of the second water pump is connected to the distiller. A liquid outlet pipe is connected to the top of the distiller. A filter box is provided on the right side of the gas-liquid separator. A filter cylinder is fixedly connected to the inner side of the filter box. A first filter plate is fixedly connected to the inner side of the filter box. A second filter plate is fixedly connected to the inner side of the filter box.

[0011] Preferably, a water tank is fixedly connected to the top of the recycling bin, and a first water pump is fixedly connected to the inner side of the water tank. The water pipe passes through the inner cavity of the recycling bin and extends into the inner cavity of the water tank. The first water pump is used to deliver cold water to the water pipe and the nozzle.

[0012] Preferably, an air inlet pipe is connected to the outside of the recovery box, a first air supply pipe is connected between the outside of the recovery box and the outside of the gas-liquid separator, a delivery pipe is connected to the outside of the recovery box, the delivery pipe is connected to the three-way valve, and a support frame is fixedly connected to the outside of the gas-liquid separator. The first air supply pipe is used to deliver waste gas, and the support frame is used to support the gas-liquid separator.

[0013] Preferably, a second gas supply pipe is connected between the gas-liquid separator and the outer side of the filter box, and the second gas supply pipe is connected to the filter cylinder. An exhaust pipe is fixedly connected to the outer side of the filter box. Both the outer side of the recovery box and the outer side of the filter box are rotatably connected to a door via hinges. A handle is fixedly connected to the outer side of the door. The second gas supply pipe is used to transport waste gas, the exhaust pipe is used to discharge the filtered waste gas, the door is used to open and close the recovery box, and the handle is used to push and pull to rotate the door.

[0014] Preferably, a controller is embedded in the outside of the recycling bin. The controller is electrically connected to the first water pump, the gas-liquid separator, the second water pump, and the distiller via wires. The controller is used to facilitate centralized control of the first water pump, the gas-liquid separator, the second water pump, and the distiller by the staff.

[0015] This utility model provides an NMP recovery device for a coating machine, which has the following beneficial effects:

[0016] 1. This coating machine NMP recovery equipment delivers waste gas into the recovery tank through an inlet pipe. The activated carbon adsorption mesh absorbs the NMP in the waste gas. A controller activates a first water pump to deliver cold water to the water pipes and nozzles. The cold water sprayed through the nozzles adsorbs the NMP in the waste gas and the activated carbon adsorption mesh, carrying the NMP to the bottom of the recovery tank. The remaining waste gas is then transported to a gas-liquid separator through a first gas delivery pipe for gas-liquid separation. A second water pump is activated to transport the NMP-containing liquid in the recovery tank and the liquid separated in the gas-liquid separator to a distiller. The distiller evaporates the water, yielding an NMP solution, thus improving recovery efficiency.

[0017] 2. The coating machine NMP recovery equipment separates the waste gas from the NMP solution through a gas-liquid separator. The waste gas is then transported to the filter box through a second gas supply pipe. The waste gas undergoes preliminary filtration through the filter cartridge. After filtration, the gas undergoes secondary filtration through the first and second filter plates. The filtered gas is then discharged through the exhaust pipe. Through multiple layers and multiple filtrations, impurities and harmful substances in the gas are reduced, thus improving environmental friendliness. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a cross-sectional view of the recycling bin of this utility model;

[0020] Figure 3 This is an exploded structural diagram of the partition of this utility model;

[0021] Figure 4 This is an enlarged view of the gas-liquid separator structure of this utility model;

[0022] Figure 5 This is a cross-sectional structural diagram of the filter box of this utility model.

[0023] [Explanation of Key Component Symbols]

[0024] 1. Recycling bin; 101. Mounting frame; 102. Activated carbon adsorption mesh; 103. Guide plate;

[0025] 2. Partition; 201. Through groove; 202. Sprayer head; 203. Water pipe;

[0026] 3. Water tank; 301. First water pump; 302. Air inlet pipe; 303. First air delivery pipe; 304. Delivery pipe;

[0027] 4. Gas-liquid separator; 401. Three-way valve; 402. Recovery pipe; 403. Second water pump; 404. Support frame; 405. Second gas delivery pipe;

[0028] 5. Dispenser; 501. Dispensing pipe;

[0029] 6. Filter box; 601. Filter cartridge; 602. First filter plate; 603. Second filter plate; 604. Exhaust pipe;

[0030] 7. Box door; 701. Handle;

[0031] 8. Controller. Detailed Implementation

[0032] This utility model embodiment provides a coating machine NMP recovery device.

[0033] Please see Figure 1 and Figure 2 The system includes a recycling bin 1, an installation frame 101 fixedly connected to the inside of the recycling bin 1, an activated carbon adsorption net 102 fixedly connected to the inside of the installation frame 101, and a guide plate 103 fixedly connected to the inside of the recycling bin 1.

[0034] Please refer to it again. Figure 1 , Figure 2 and Figure 3 A partition 2 is fixedly connected to the inner side of the recycling bin 1. A through groove 201 is opened on the inner side of the partition 2. A nozzle 202 is fixedly connected to the inner side of the through groove 201. A water pipe 203 is fixedly connected to the top of the nozzle 202. A water tank 3 is fixedly connected to the top of the recycling bin 1. A first water pump 301 is fixedly connected to the inner side of the water tank 3. The first water pump 301 is model 2DK-20. The water pipe 203 passes through the inner cavity of the recycling bin 1 and extends into the inner cavity of the water tank 3. A controller 8 is embedded in the outer side of the recycling bin 1. The controller 8 is electrically connected to the first water pump 301, the gas-liquid separator 4, the second water pump 403, and the distiller 5 via wires. The controller 8 is model ADAM-5510M. Waste gas is fed into the recovery tank 1 through pipe 302. NMP in the waste gas is absorbed by the activated carbon adsorption net 102. The controller 8 starts the first water pump 301 to deliver cold water into the water pipe 203 and the nozzle 202. The cold water is sprayed through the nozzle 202 to adsorb NMP in the waste gas and the activated carbon adsorption net 102, bringing NMP to the bottom of the recovery tank 1. The remaining waste gas is transported to the gas-liquid separator 4 through the first gas supply pipe 303 for gas-liquid separation. The second water pump 403 is started to transport the liquid containing NMP in the recovery tank 1 and the liquid separated in the gas-liquid separator 4 to the distiller 5. The distiller 5 is started to evaporate the water, thereby obtaining an NMP solution, which improves the recovery efficiency.

[0035] Please refer to it again. Figure 1 , Figure 4 and Figure 5A gas-liquid separator 4, model TYAF-1, is installed on the right side of the recovery tank 1. A three-way valve 401 is fixedly connected to the output end of the gas-liquid separator 4. A recovery pipe 402 is fixedly connected to the output end of the three-way valve 401. A second water pump 403, model 2DK-20, is fixedly connected to the end of the recovery pipe 402. A distiller 5, model LD500-5, is installed in front of the second water pump 403. The output end of the second water pump 403 is connected to the distiller 5. A liquid outlet pipe 501 is connected to the top of the distiller 5. A filter box 6 is installed on the right side of the gas-liquid separator 4. A filter cylinder 601 is fixedly connected to the inside of the filter box 6. A first filter plate 602 and a second filter plate 603 are fixedly connected to the inside of the filter box 6. An air inlet pipe 302 is connected to the outside of the recovery tank 1. A third air inlet pipe 302 is connected between the outside of the recovery tank 1 and the outside of the gas-liquid separator 4. A gas supply pipe 303 is connected to the outside of the recovery box 1 via a delivery pipe 304, which is connected to a three-way valve 401. A support frame 404 is fixedly connected to the outside of the gas-liquid separator 4. A second gas supply pipe 405 is connected between the outside of the gas-liquid separator 4 and the outside of the filter box 6, and the second gas supply pipe 405 is connected to the filter cartridge 601. An exhaust pipe 604 is fixedly connected to the outside of the filter box 6. Both the recovery box 1 and the filter box 6 are hinged to have a door 7, and a handle 701 is fixedly connected to the outside of the door 7. The gas-liquid separator 4 separates the waste gas from the NMP solution, and the waste gas is delivered to the filter box 6 via the second gas supply pipe 405. The waste gas undergoes preliminary filtration through the filter cartridge 601, and then undergoes secondary filtration through the first filter plate 602 and the second filter plate 603. The filtered gas is then discharged through the exhaust pipe 604. Through multiple layers of filtration, impurities and harmful substances in the gas are reduced, improving environmental friendliness.

[0036] In use, this invention works as follows: waste gas is supplied to the recovery tank 1 through the air inlet pipe 302, and NMP in the waste gas is absorbed by the activated carbon adsorption net 102. The controller 8 starts the first water pump 301 to supply cold water to the water pipe 203 and the nozzle 202. The cold water is sprayed through the nozzle 202 to adsorb NMP in the waste gas and the activated carbon adsorption net 102, bringing NMP to the bottom of the recovery tank 1. The remaining waste gas is then transported to the gas-liquid separator 4 through the first air supply pipe 303 for gas-liquid separation. The second water pump 403 is started to transport the liquid containing NMP in the recovery tank 1 and the liquid separated in the gas-liquid separator 4 to the distiller 5. The distiller 5 is started to evaporate the water, thereby obtaining an NMP solution.

[0037] Working principle: The waste gas is separated from the NMP solution by the gas-liquid separator 4. The waste gas is then transported to the filter box 6 through the second gas supply pipe 405. The waste gas undergoes preliminary filtration through the filter cylinder 601. After filtration, the gas undergoes secondary filtration through the first filter plate 602 and the second filter plate 603. The filtered gas is then discharged through the exhaust pipe 604. Through multiple layers of filtration, impurities and harmful substances in the gas are reduced.

[0038] It should be noted that the first water pump 301, gas-liquid separator 4, second water pump 403, distiller 5, and controller 8 mentioned in the text are all existing technologies. The principle of the first water pump 301 and the second water pump 403 is as follows: they include a motor and an impeller. The motor inside the pump body drives the impeller to rotate, thereby converting the power into the power of the liquid, thus generating the force of flow and transporting the liquid from the low-pressure area to the high-pressure area. The principle of the gas-liquid separator 4 is to use the density difference between gas and liquid and the fluid dynamics effect to achieve the separation of gas and liquid by setting a special structure or problem. The principle of the distiller 5 is based on the boiling point of each component in the liquid mixture. The different boiling points allow for the separation and purification of substances by heating to evaporate low-boiling-point components and then cooling the steam to recondense it into a liquid. The principle of controller 8 is as follows: it includes a PLC and a memory. Specifically, when the PLC is running, it performs a periodic cyclic scan according to the instruction step number or address number, based on the program that the user has programmed according to the control requirements and stored in the user program memory. If there is no jump instruction, it executes the user program sequentially from the first instruction until the program ends, and then returns to the first instruction to start the next round of scanning. During each scan, it also performs tasks such as sampling the input signals and refreshing the output status.

[0039] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A coating machine NMP recycling device, comprising a recycling bin (1), wherein a mounting bracket (101) is fixedly connected to the inner side of the recycling bin (1), characterized in that: An activated carbon adsorption net (102) is fixedly connected to the inner side of the mounting frame (101), and a guide plate (103) is fixedly connected to the inner side of the recycling box (1). The recycling bin (1) is fixedly connected to a partition (2), and the partition (2) has a through groove (201) on its inner side. A nozzle (202) is fixedly connected to the inner side of the through groove (201), and a water pipe (203) is fixedly connected to the top of the nozzle (202).

2. The NMP recovery equipment for a coating machine according to claim 1, characterized in that: A gas-liquid separator (4) is provided on the right side of the recovery box (1). A three-way valve (401) is fixedly connected to the output end of the gas-liquid separator (4). A recovery pipe (402) is fixedly connected to the output end of the three-way valve (401). A second water pump (403) is fixedly connected to the end of the recovery pipe (402). A distiller (5) is provided in front of the second water pump (403). The output end of the second water pump (403) is connected to the distiller (5). A liquid outlet pipe (501) is connected to the top of the distiller (5). A filter box (6) is provided on the right side of the gas-liquid separator (4). A filter cylinder (601) is fixedly connected to the inside of the filter box (6). A first filter plate (602) is fixedly connected to the inside of the filter box (6). A second filter plate (603) is fixedly connected to the inside of the filter box (6).

3. The coating machine NMP recovery equipment according to claim 2, characterized in that: A water tank (3) is fixedly connected to the top of the recycling bin (1), and a first water pump (301) is fixedly connected to the inside of the water tank (3). The water pipe (203) passes through the inner cavity of the recycling bin (1) and extends into the inner cavity of the water tank (3).

4. The coating machine NMP recovery equipment according to claim 2, characterized in that: An air inlet pipe (302) is connected to the outside of the recovery box (1), a first air supply pipe (303) is connected between the outside of the recovery box (1) and the outside of the gas-liquid separator (4), a delivery pipe (304) is connected to the outside of the recovery box (1), the delivery pipe (304) is connected to the three-way valve (401), and a support frame (404) is fixedly connected to the outside of the gas-liquid separator (4).

5. The coating machine NMP recovery equipment according to claim 2, characterized in that: A second gas supply pipe (405) is connected between the outer side of the gas-liquid separator (4) and the filter box (6). The second gas supply pipe (405) is connected to the filter cylinder (601). An exhaust pipe (604) is fixedly connected to the outer side of the filter box (6). Both the outer side of the recovery box (1) and the filter box (6) are rotatably connected to a door (7) via a hinge. A handle (701) is fixedly connected to the outer side of the door (7).

6. The coating machine NMP recovery equipment according to claim 3, characterized in that: The outer side of the recycling bin (1) is embedded with a controller (8), which is electrically connected to the first water pump (301), the gas-liquid separator (4), the second water pump (403) and the distiller (5) via wires.

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