Dimethyl formamide effluent gases recovering and processing method for dry method synthetic leather

A technology for recovery of dimethylformamide and waste gas, applied in separation methods, chemical instruments and methods, separation of dispersed particles, etc., can solve problems of biochemical oxygen consumption, chemical oxygen consumption and increased nitrogen content, water quality deterioration, DMF The market price is expensive and other issues, to achieve the effect of protecting human health, improving water quality, and social benefits

Inactive Publication Date: 2006-07-19
ZHEJIANG HEXIN NEW MATERIAL CO LTD
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Problems solved by technology

In the water, it will lead to increased biochemical oxygen consumption, chemical oxygen consumption and nitrogen content, which will rapidly deteriorate the water quality; moreover, the market

Method used

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  • Dimethyl formamide effluent gases recovering and processing method for dry method synthetic leather

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Example Embodiment

[0011] The present invention will be described in detail below in conjunction with the accompanying drawings: the present invention uses a new domestic wire mesh filler with a large specific surface area, a high plate height, a small pressure drop and other comprehensive performances to replace imported ones, and its separation effect is better; The solid outer spiral nozzle has better atomization and distribution uniformity, ensuring a larger contact area and more effective contact time for gas-liquid contact; improving the exhaust mist collection structure; designing and manufacturing high-efficiency liquid distributors; designing and manufacturing Suitable packing absorption tower.

[0012] According to the dry production process requirements, set the performance parameters of the fan, select the first-class listed company's high-efficiency frequency conversion energy-saving fan 1, and send the dimethylformamide production waste gas 2 into the filler consisting of at least one ...

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Abstract

The invention discloses a waste gas recovery disposal method of dry synthetic leather DMF, which comprises the following steps: sending the DMF waste gas in the feeding tower with at least one grade of counter current absorption structure and one grade of fog-receiving structure through variable-frequency energy-saving fan; draining the qualified waste gas from one side of feeding tower and DMF solution from the other side. The feeding tower is composed of two-grade water counter current absorption structure and two-grade fog-receiving structure. The DMF waste gas is absorbed by one-grade spray and sent to two-grade water counter current absorption after cooling, which is drained when the gas reaches the standard. The invention displays simple technological flow path, convenient usage and stable operation, which can realize complete-automatic artificial intelligent control to improve the economical benefit.

Description

technical field [0001] The invention relates to a method for recovering and treating waste gas produced by dry-process synthetic leather dimethylformamide. Background technique [0002] A large amount of organic waste gas will be produced in the dry production process of PU leather, and its main component is dimethylformamide, referred to as DMF. If the waste gas is not treated, it will pollute the air environment and endanger human health if it is discharged into the workshop and factory area. . At present, dry production waste gas treatment and DMF recovery are still blank in China, but there have been research reports in the world since the mid-1990s, and they have been put into operation, and the waste gas treatment effect is good. [0003] From the perspective of resource recovery or not, exhaust gas treatment can be divided into recovery method and decomposition and disposal method, generally including condensation method, adsorption method, absorption method, catalyt...

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Application Information

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IPC IPC(8): B01D53/18
Inventor 赵舜华
Owner ZHEJIANG HEXIN NEW MATERIAL CO LTD
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