Near-zero-emission productization recovery method and system for cleaning nitrogen-rich organic tail gas of electrolyte equipment

Abstract

The invention belongs to the technical field of tail gas treatment, and particularly relates to a near-zero-emission productization recovery method and system for cleaning nitrogen-rich organic tail gas of electrolyte equipment. The near-zero emission recovery method provided by the invention comprises the following steps: mixing electrolyte equipment cleaning nitrogen-rich organic tail gas and recycle gas of a recovery system, and then carrying out first membrane separation to obtain first-stage retentate gas and first-stage permeate gas; condensing the first-stage permeate gas to obtain condensed gas and condensed liquid, wherein the condensation temperature is greater than or equal to 25 DEG C; and subjecting the condensed gas to second membrane separation, and obtaining second-stage retentate gas and second-stage permeate gas, wherein the second-stage permeate gas is circulation gas. According to the near-zero emission recovery method provided by the invention, nitrogen in the organic tail gas can be recovered under the condition of room temperature, so that the nitrogen meets the requirement of purge gas for cyclic utilization, meanwhile, grease in the organic tail gas is recovered as a cleaning agent for cyclic utilization, and low-cost near-zero-emission productization recovery and cyclic utilization of the electrolyte equipment cleaning nitrogen-rich organic tail gas are realized.

Description

technical field

[0001] The invention belongs to the technical field of tail gas treatment, and in particular relates to a near-zero-emission product recovery method and system for cleaning nitrogen-rich organic tail gas by electrolyte equipment. Background technique

[0002] With the rapid development of the new energy battery industry, the demand for battery electrolyte has increased on a large scale. The demand for devices for producing electrolyte and electrolyte barrels for packaging electrolyte has also increased. The electrolyte has extremely high requirements on the quality of the production equipment and the electrolyte barrel, and the impurity requirement is at the level of parts per million (ie ppm level). Therefore, in order to achieve the purpose of recycling the electrolyte production device and the electrolyte tank while ensuring the quality of the electrolyte, the electrolyte production device and the electrolyte tank must be cleaned to reduce the impurity co...

Examples

Embodiment 1

[0082] Select porosity 60~80%, the porous polysquintimide of 0.3~0.6um and polycarbonate are support membrane; Use fluorine-containing polysiloxane (molecular weight M w =300000~600000) and solvent ethyl acetate, prepare a coating solution with a concentration of 15%, add a crosslinking agent hydrogen-containing silicone oil and a catalyst platinum complex to it, the concentrations are 2wt% and 0.15wt%, and stir evenly After that, let it stand until there are no bubbles by visual inspection.

[0083] The film liquid is coated on the porous polysquintimide and the polycarbonate support film respectively by one-step roller coating method; the crosslinking temperature of the oven is controlled at 70-80°C, and the first film is obtained by heating and curing until dry without residual solvent. Separation membrane for membrane separation and second membrane separation;

[0084] use figure 1 In the system shown, the electrolyte tank 1 is cleaned with nitrogen-rich organic tail gas...

Embodiment 2

[0089] Select porosity 60~80%, the porous polysquintimide of 0.3~0.6um and polycarbonate are support membrane; Use fluorine-containing polysiloxane (molecular weight M w =300000~600000) and solvent ethyl acetate, prepare a coating solution with a concentration of 15%, add a crosslinking agent hydrogen-containing silicone oil and a catalyst platinum complex to it, the concentrations are 2wt% and 0.15wt%, and stir evenly After that, let it stand until there are no bubbles by visual inspection.

[0090] The film solution is coated on the porous polyimide and polycarbonate support film respectively by one-step roller coating method; the crosslinking temperature of the oven is controlled at 70-80 °C, and the first film is obtained by heating and curing until dry without residual solvent. Separation membrane for membrane separation and second membrane separation;

[0091] use figure 1 In the system shown, the electrolyte tank 1 is cleaned with nitrogen-rich organic tail gas (40°C,...

technical field

[0001] The invention belongs to the technical field of tail gas treatment, and in particular relates to a near-zero-emission product recovery method and system for cleaning nitrogen-rich organic tail gas by electrolyte equipment. Background technique

[0002] With the rapid development of the new energy battery industry, the demand for battery electrolyte has increased on a large scale. The demand for devices for producing electrolyte and electrolyte barrels for packaging electrolyte has also increased. The electrolyte has extremely high requirements on the quality of the production equipment and the electrolyte barrel, and the impurity requirement is at the level of parts per million (ie ppm level). Therefore, in order to achieve the purpose of recycling the electrolyte production device and the electrolyte tank while ensuring the quality of the electrolyte, the electrolyte production device and the electrolyte tank must be cleaned to reduce the impurity co...

Examples

Embodiment 1

[0082] Select porosity 60~80%, the porous polysquintimide of 0.3~0.6um and polycarbonate are support membrane; Use fluorine-containing polysiloxane (molecular weight M w =300000~600000) and solvent ethyl acetate, prepare a coating solution with a concentration of 15%, add a crosslinking agent hydrogen-containing silicone oil and a catalyst platinum complex to it, the concentrations are 2wt% and 0.15wt%, and stir evenly After that, let it stand until there are no bubbles by visual inspection.

[0083] The film liquid is coated on the porous polysquintimide and the polycarbonate support film respectively by one-step roller coating method; the crosslinking temperature of the oven is controlled at 70-80°C, and the first film is obtained by heating and curing until dry without residual solvent. Separation membrane for membrane separation and second membrane separation;

[0084] use figure 1 In the system shown, the electrolyte tank 1 is cleaned with nitrogen-rich organic tail gas...

Embodiment 2

[0089] Select porosity 60~80%, the porous polysquintimide of 0.3~0.6um and polycarbonate are support membrane; Use fluorine-containing polysiloxane (molecular weight M w =300000~600000) and solvent ethyl acetate, prepare a coating solution with a concentration of 15%, add a crosslinking agent hydrogen-containing silicone oil and a catalyst platinum complex to it, the concentrations are 2wt% and 0.15wt%, and stir evenly After that, let it stand until there are no bubbles by visual inspection.

[0090] The film solution is coated on the porous polyimide and polycarbonate support film respectively by one-step roller coating method; the crosslinking temperature of the oven is controlled at 70-80 °C, and the first film is obtained by heating and curing until dry without residual solvent. Separation membrane for membrane separation and second membrane separation;

[0091] use figure 1 In the system shown, the electrolyte tank 1 is cleaned with nitrogen-rich organic tail gas (40°C,...

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