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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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AI Technical Summary

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 price of DMF is also relatively expensive. Due to the consideration of safety, there is an urgent need to develop and develop an effective DMF waste gas recovery and treatment method in China.

Method used

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

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Embodiment Construction

[0011] The present invention will be described in detail below in conjunction with the accompanying drawings: the present invention adopts domestically produced new wire mesh fillers with superior overall performance such as large specific surface area, high plate height, and small pressure drop to replace imported ones, and its separation effect is better; The solid outer spiral nozzle has better atomization degree and distribution uniformity, which ensures a larger contact area and more effective contact time for gas-liquid contact; improves the exhaust gas collection structure; designs and manufactures high-efficiency liquid distributors; designs and manufactures The corresponding packed absorption tower.

[0012] According to the requirements of the dry production process, set the performance parameters of the fan, select a high-efficiency frequency conversion and energy-saving fan 1 of a first-class listed company, and send the waste gas 2 produced by dimethylformamide int...

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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...

Claims

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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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