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CN-224220757-U - NMP solution purification device for lithium battery production

CN224220757UCN 224220757 UCN224220757 UCN 224220757UCN-224220757-U

Abstract

The utility model discloses an NMP solution purifying device for lithium battery production, which comprises a distillation tank, wherein a top cover is arranged at the top of the distillation tank, a steam outlet pipe is arranged on the top cover, a heat exchange pipe which extends into the bottom of an inner cavity of the distillation tank and is spiral is arranged on the top cover through a fixing frame, a first hot water inlet pipe and a first hot water outlet pipe which are connected with the two end parts of the heat exchange pipe are arranged on the top cover, a feeding pipe is arranged on the top cover, a jacket is arranged at the outer side of the distillation tank, an interlayer is formed between the jacket and the outer wall provided with the distillation tank, and a plurality of second hot water inlet pipes and second hot water outlet pipes which are communicated with the interlayer are arranged on the jacket.

Inventors

  • ZHANG ZHIHENG
  • ZHANG QIANYU
  • LIU YUHUA

Assignees

  • 天津市汇筑恒升科技有限公司

Dates

Publication Date
20260512
Application Date
20250514

Claims (6)

  1. 1. The NMP solution purification device for lithium battery production is characterized by comprising a distillation tank (1), wherein a top cover (2) is arranged at the top of the distillation tank (1), a steam outlet pipe (3) is arranged on the top cover (2), a heat exchange pipe (4) which stretches into the bottom of an inner cavity of the distillation tank (1) and is spiral is arranged on the top cover (2) through a fixing frame, a first hot water inlet pipe (5) and a first hot water outlet pipe (6) which are connected with two end parts of the heat exchange pipe (4) are arranged on the top cover (2), a feed pipe (8) is arranged on the top cover (2), a jacket (9) is arranged on the outer side of the distillation tank (1), an interlayer (10) is formed between the jacket (9) and the outer wall provided with the distillation tank (1), a plurality of second hot water inlet pipes (11) and second hot water outlet pipes (12) which are communicated with the interlayer (10) are arranged on the jacket, the first hot water inlet pipe (5), the first hot water outlet pipe (6), the second hot water inlet pipes (11) and the second hot water inlet pipes (12) are connected with a heat insulation pipe (13) through a heat insulation pipe (13) and a circulating machine (1), and a water path mechanism (19) is formed between the jacket and the circulating machine and the bottom of the circulating machine.
  2. 2. The NMP solution purification device for lithium battery production according to claim 1, wherein the inner wall of the distillation tank (1) and the outer wall of the heat exchange tube (4) are coated with an anti-corrosion coating.
  3. 3. The NMP solution purification device for lithium battery production according to claim 1, wherein the first hot water inlet pipe (5) and the second hot water inlet pipe are respectively provided with an inlet water temperature sensor (16), and the first hot water outlet pipe (6) and the second hot water outlet pipe are respectively provided with an outlet water temperature sensor (17).
  4. 4. The NMP solution purification device for lithium battery production according to claim 1, wherein a sealing ring is arranged between the distillation pot (1) and the top cover (2), and a vacuum gauge (18) for detecting the internal vacuum degree of the distillation pot (1) is arranged on the top cover (2).
  5. 5. The NMP solution purification device for lithium battery production according to claim 1, wherein the shaftless turbulent flow mechanism (19) comprises a guide pipe (20) which is arranged at the bottom of the distillation tank (1) in an inclined mode, a piston block (21) which moves along the inner cavity of the guide pipe (20) is arranged in the guide pipe (20), a sealing layer (22) for sealing the joint between the piston block (21) and the guide pipe (20) is arranged on the periphery of the piston block (21), and an electric push rod (23) which drives the piston block to reciprocate is arranged at the bottom of the distillation tank (1).
  6. 6. The NMP solution purification device for lithium battery production according to claim 5, characterized in that the end of said conduit (20) is provided with a flow guide (24).

Description

NMP solution purification device for lithium battery production Technical Field The utility model relates to the technical field related to NMP solution purification, in particular to an NMP solution purification device for lithium battery production. Background NMP (N-methyl pyrrolidone) is colorless transparent oily liquid, has little amine smell, has a melting point of-24.4 ℃ and a boiling point of 203 ℃, has a flash point of 95 ℃, has low volatility and high thermal stability and chemical stability, and is widely used in the lithium battery manufacturing industry. The existing NMP solution purification process adopts reduced pressure distillation to purify, so that the existing distillation tank is heated in an electric heating mode, the added temperature is uncontrollable, local heating temperature is easily caused to be too high, thermal decomposition is easily generated in the reduced pressure distillation process to form other products, and the existing distillation tank adopts a mechanical shaft to stir, so that the pressure relief phenomenon is easily generated at the sealing part of the mechanical shaft in the reduced pressure distillation process. Disclosure of utility model In order to solve the defects in the prior art, the utility model provides an NMP solution purifying device for lithium battery production. In order to solve the technical problems, the utility model provides the following technical scheme: The utility model discloses an NMP solution purification device for lithium battery production, which comprises a distillation tank, wherein a top cover is arranged at the top of the distillation tank, a steam outlet pipe is arranged on the top cover, a heat exchange pipe which extends into the bottom of an inner cavity of the distillation tank and is spiral is arranged on the top cover through a fixing frame, a first hot water inlet pipe and a first hot water outlet pipe which are connected with the end parts of two ends of the heat exchange pipe are arranged on the top cover, a feeding pipe is arranged on the top cover, a jacket is arranged on the outer side of the distillation tank, an interlayer is formed between the jacket and the outer wall of the distillation tank, a plurality of second hot water inlet pipes and second hot water outlet pipes which are communicated with the interlayer are arranged on the jacket, the first hot water inlet pipes, the first hot water outlet pipes and the second hot water inlet pipes are connected with a hot water circulation machine through heat insulation pipes, and a shaftless turbulent flow mechanism is arranged at the bottom of the distillation tank. As a preferable technical scheme of the utility model, the inner wall of the distillation tank and the outer wall of the heat exchange tube are coated with anti-corrosion coatings. As a preferable technical scheme of the utility model, the first hot water inlet pipe and the second hot water inlet pipe are respectively provided with a water inlet temperature sensor, and the first hot water outlet pipe and the second hot water outlet pipe are respectively provided with a water outlet temperature sensor. As a preferable technical scheme of the utility model, a sealing ring is arranged between the distillation tank and the top cover, and a vacuum gauge for detecting the internal vacuum degree of the distillation tank is arranged on the top cover. As a preferable technical scheme of the utility model, the shaftless turbulent flow mechanism comprises a guide pipe which is arranged at the bottom of the distillation tank in an inclined way, a piston block which moves along the inner cavity of the guide pipe is arranged in the guide pipe, a sealing layer which seals the joint between the piston block and the guide pipe is arranged on the periphery of the piston block, and an electric push rod which drives the piston block to reciprocate is arranged at the bottom of the distillation tank. As a preferable technical scheme of the utility model, the end part of the conduit is provided with a flow guiding pipe. The beneficial effects of the utility model are as follows: 1. This kind of NMP solution purification device for lithium cell production is through installing the heat exchange tube that stretches into the retort inner chamber bottom and be the heliciform that stretch into through the mount on the top cap, be equipped with on the top cap with heat exchange tube's both ends end connection first hot water advance pipe and first hot water exit tube, thereby play the effect of heating through letting in circulating hot water in the heat exchange tube like this, and circulating hot water's temperature convenient control, can not produce big undulant, and can not cause the pyrolysis because of local heating excessively, and the heat exchange tube is integrated on the top cap so conveniently dismantle and wash, wherein the heliciform heat exchange tube of spiral setting has great heat transfer area, form the interme