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Chlorination section byproduct hydrogen chloride gas absorption and purification acid-forming system and process

A technology for purifying hydrogen chloride gas and tail gas, which is applied in gas treatment, chemical instruments and methods, membrane technology, etc., can solve the problems of high energy consumption, large equipment investment, low economic benefits, etc., and achieves large amount of hydrochloric acid and high dechlorination efficiency. , the effect of good economic benefits

Active Publication Date: 2020-06-26
杭州东日节能技术有限公司
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Problems solved by technology

In the above process, the equipment investment is large, the energy consumption is high, and the economic benefit is low

Method used

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  • Chlorination section byproduct hydrogen chloride gas absorption and purification acid-forming system and process
  • Chlorination section byproduct hydrogen chloride gas absorption and purification acid-forming system and process

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Embodiment Construction

[0035] In order to further understand the content of the present invention, the present invention is described in detail in conjunction with examples, and the following examples are used to illustrate the present invention, but are not used to limit the scope of the present invention.

[0036] like figure 1 and figure 2 As shown, the present embodiment relates to a system for absorbing and purifying by-product hydrogen chloride gas in the chlorine generation section into an acid system, which is used to process the hydrogen chloride gas generated in the chlorination reactor 13, which includes interconnected tail gas purification into acid system, dechlorination The washing device and the analysis and concentration device, the tail gas purification into acid system includes a washing tank 1, a cooler 2, a falling film absorber 3 and a first absorption tower 4 connected in sequence, and the dechlorination washing device includes a sequential connection steam heater 6, dechlori...

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Abstract

The invention relates to a chlorination section byproduct hydrogen chloride gas absorption and purification acid-forming system and process. The system comprises: a tail gas purification acid-formingdevice, which is used for absorbing byproduct hydrogen chloride gas into 31-33wt% hydrochloric acid containing free chlorine; a dechlorination washing device, which is used for dechlorinating the hydrochloric acid containing free chlorine to obtain 30-31wt% dechlorinated hydrochloric acid; and a desorption concentration device, which is used for desorbing one part of dechlorinated hydrochloric acid into hydrogen chloride gas, and performing absorption with the other part of dechlorinated hydrochloric acid to obtain 31-32wt% industrial-grade hydrochloric acid; wherein the tail gas purificationacid-forming device, the dechlorination washing device and the desorption concentration device are sequentially communicated. According to the invention, hydrogen chloride-containing waste gas generated by reaction in a chlorination reaction kettle can be absorbed and purified into industrial hydrochloric acid, so that the waste gas can be recycled, and the concept of energy conservation and environmental protection is met.

Description

technical field [0001] The invention belongs to the field of environmental protection treatment, and in particular relates to a system and process for absorbing and purifying hydrogen chloride gas, a by-product of a chlorination process section, into acid. Background technique [0002] Hydrochloric acid is an aqueous solution of hydrogen chloride gas, which has strong acidity and is extremely volatile. Concentrated hydrochloric acid forms a white acid mist with a pungent smell in the air. It is generally used as a solvent, corrosive agent, and organic synthesis catalyst. leather industry. At present, the absorption of hydrogen chloride gas mainly adopts: adiabatic absorption tower (packed tower) and membrane absorber. The disadvantage is that the absorption efficiency of hydrogen chloride is low. In addition, the adiabatic absorption tower is prone to tower flooding and partial flow. The membrane absorber adopts the absorption tube. The liquid film formed by the absorption ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/14B01D53/18
CPCB01D53/1418B01D53/1406B01D53/1425B01D53/1456B01D53/18B01D2257/2045
Inventor 童新洋仇晓丰徐林波姜思炜邱鹭
Owner 杭州东日节能技术有限公司
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