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Novel filler for recycling water-soluble solvents

A water-soluble solvent and a new type of technology, applied in the field of waste recycling, can solve the problems of limiting industrial waste gas treatment at near atmospheric pressure, high tower pressure drop, uneven wetting of the contact surface, etc., to increase the effective surface area, improve efficiency, increase The effect of large circulation channels

Inactive Publication Date: 2017-08-08
CHANGZHOU UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The invention provides a new type of filler for water-soluble solvent recovery, which solves the technical problem of high tower pressure drop and uneven wet contact surface in the prior art, which limits the treatment of industrial waste gas at near atmospheric pressure

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] The embodiment of the present invention provides a new type of filler for water-soluble solvent recovery, which has a hydrophilic surface, and the components of the hydrophilic surface are hydrophilic groups with anionic surfactants, cationic surfactants Hydrophilic groups, compounds of one or more groups in the hydrophilic groups of nonionic surfactants composed of oxygen-containing groups.

[0017] Among them, the hydrophilic surface can be obtained through the adjustment of the composition, the adjustment of the surface micro-topography, or the joint adjustment of the surface composition and the surface micro-topography.

[0018] The hydrophilic groups of anionic surfactants include carboxylic acid groups, sulfonic acid groups, sulfuric acid groups and phosphoric acid groups; the hydrophilic groups of cationic surfactants include amino groups and quaternary ammonium groups; Hydrophilic group ether group, hydroxyl group, aldehyde group, carbonyl group, block polyether...

Embodiment 2

[0030] Using 304 stainless steel orifice plate θ ring packing as the substrate, a layer of alumina surface layer is prepared on the surface of the packing by dipping coating and high temperature sintering method. The specific process is as follows: 304 stainless steel orifice plate θ ring packing is impregnated with alumina slurry ( 5 μm average particle size, 10% mass concentration), take out the slurry and dry it in the air, and then sinter and shape it at 800°C to 1300°C to obtain a filler with a particle accumulation morphology and a hydrophilic layer on the surface.

[0031] The filler is used as NMP waste gas absorption filler, and under the same gas velocity and liquid flow rate, the pressure drop is basically the same, but the efficiency of the filler is increased by more than 10%.

Embodiment 3

[0033] The honeycomb ceramic structured packing is used as the matrix, and the surface of the packing is modified by sulfonation method. The specific process is as follows: soak the honeycomb ceramic structured packing in 30% sulfuric acid solution, heat up to boiling, keep for 3 hours, and then cool down naturally After reaching room temperature, the packing is taken out, rinsed with pure water until neutral, and dried to obtain a honeycomb ceramic structured packing with a surface layer modified by a sulfonic acid hydrophilic group.

[0034] The filler is used as NMP waste gas absorption filler, and under the same gas velocity and liquid flow condition, the pressure drop drops by more than 5%, and the efficiency of the filler increases by more than 15%.

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Abstract

The invention relates to the field of waste recycling, and discloses a novel filler for recycling water-soluble solvents and relates to a novel filler. The filler has a functional hydrophilic surface, so that the filler surface can be fully wetted and liquid can be fully spread on the filler surface while a gas-liquid flow channel is built. The filler with the functional hydrophilic surface has the characteristics of low pressure drop of filling layer and high efficiency, can be used as a core component in the process of recycling the water-soluble solvents and is especially applicable to tower equipment for treating waste gas generated by producing lithium ion batteries and recycling NMP (n-methyl-pyrrolidone).

Description

technical field [0001] The invention relates to the field of waste recycling, in particular to a novel filler used for recycling water-soluble solvents. Background technique [0002] N-Methylpyrrolidone (NMP) can be miscible with water, alcohol, ether, ester, ketone, halogenated hydrocarbon and aromatic hydrocarbon. It has the characteristics of high boiling point, strong solvency and non-flammability. non-polar solvents. In the production of lithium-ion batteries, NMP is used as a solvent for positive electrode slurry (a mixture of nickel-cobalt lithium manganese oxide, conductive carbon black, solvent NMP, and binder PVDF). After the positive electrode is coated on the surface of the substrate, it is necessary to remove the NMP organic solvent by drying and baking, and a large amount of NMP waste gas will be generated at this time. In recent years, with the rapid development of mobile equipment, the supporting lithium battery industry has been vigorously developed, and t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J19/30B01D46/30
CPCB01J19/30B01D46/003B01D46/30B01J2219/304B01J2219/30408B01J2219/30416
Inventor 王龙耀朱俊王岚
Owner CHANGZHOU UNIV