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NMP tower type recovery system

A recovery system and tower technology, applied in the field of NMP recovery, can solve the problems of raw material waste, environmental pollution, etc., and achieve the effect of simple and convenient control and low failure rate

Inactive Publication Date: 2020-11-03
刘德国
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

If NMP is not recycled, it will not only cause environmental pollution, but also cause a lot of waste of raw materials, so recycling NMP is an important part of the green battery production process that affects environmental protection

Method used

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Embodiment Construction

[0014] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0015] combined with figure 1 , figure 2 , a kind of NMP tower type recovery system, it comprises high tower treatment room 1, and described high tower treatment room 1 is provided with exhaust gas adsorption unit, gas-liquid separation unit sequentially from bottom to top, described high tower treatment room 1 inner side and An inlet 2 is connected near the lower end, and the inlet 2 is connected with an air pipe 3, and the other end of the air pipe 3 is connected with a fan 4. pool 6, the high tower processing chamber 1 is provided with a waste liquid spraying device 7 higher than the inlet 2, and the high tower processing chamber 1 is provided with a demister 8 higher than the waste liquid spraying device 7, and the gas The liquid separation section includes a gas-liquid separator 9, and the high tower processing chamber 1 is set to two, and the gas sep...

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Abstract

The invention relates to an NMP tower type recovery system, wherein a waste gas adsorption unit and a gas-liquid separation unit are sequentially arranged in a high-tower treatment chamber from bottomto top; an inlet is formed in the inner side face of the high-tower treatment chamber and is close to the lower end in a communicating mode, an air pipe is arranged at the inlet in a communicating mode, and a draught fan is arranged at the other end of the air pipe in a communicating mode; the waste gas adsorption unit comprises waste liquid pool arranged on bottom surface in high tower treatmentchamber; the waste liquid spraying equipment is arranged in the high-tower treatment chamber and higher than the inlet, a demister is arranged in the high-tower treatment chamber and higher than thewaste liquid spraying equipment, the gas-liquid separation section comprises two gas-liquid separators, and gas separated by the gas-liquid separators is matched and communicated with the inlet of theother high-tower treatment chamber through a pipeline. The waste liquid spraying equipment of one high-tower treatment chamber is communicated with a waste liquid tank in a matched manner, one side surface in the waste liquid spraying equipment is communicated with a pure water supplementing pipe, and gas in the other high-tower treatment chamber is provided with an exhaust fan. The system has the advantages of being simple in structure and efficient in recovery.

Description

technical field [0001] The invention relates to the technical field of NMP recovery, in particular to an NMP tower recovery system. Background technique [0002] N-Methyl-2-pyrrolidone (1-methyl-2-pyrrolidone, NMP for short), colorless transparent liquid, boiling point 204°C, flash point 95°C, low viscosity, slight ammonia smell, chemical and thermal stability Good, high polarity, low volatility, miscible with water in any ratio and so on. NMP is the main component of exhaust gas emitted from the production of lithium-ion batteries. It is a toxic gas with a content of 0.06% to 0.5%. If NMP is not recycled, it will not only cause environmental pollution, but also cause a lot of waste of raw materials. Therefore, recycling and processing NMP is an important part of the green battery production process that affects environmental protection. Contents of the invention [0003] The technical problem to be solved by the present invention is to solve the above problems and provi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/14C07D207/267
CPCB01D53/1418B01D53/1487B01D53/1493B01D2252/103C07D207/267
Inventor 刘德国
Owner 刘德国
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