Processing method of acid gas

A treatment method and acid gas technology, applied in combustion methods, separation methods, chemical instruments and methods, etc., can solve the problems of excess gypsum products, low desulfurization efficiency, ammonia escape, etc., so as to reduce operating costs and difficulties, and realize recycling. , the effect of simplifying the processing flow
CN102198365AInactive Publication Date: 2011-09-28BEIJING FUNGHAN ENG CONSULTING
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
BEIJING FUNGHAN ENG CONSULTING
Publication Date
2011-09-28
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a processing method of acid gas, comprising the steps of: burning the acid gas; reacting the burned acid gas with oxygenous gas to obtain the acid gas containing SO3 and SO2; reacting the acid gas containing SO3 and SO2 with water to obtain sulphuric acid and sulphurous acid, and conveying tail gas downstream for processing; and directly recovering the sulphuric acid and the sulphurous acid, or returning to the step of burning the acid gas. The technical scheme provided by the invention is simple to operate; by use of the technical scheme, the acid gas can be effectively purified, the sulfur recovery rate is increased, the processing procedure of the acid gas is simplified, and the operation difficulty is reduced; and the processing method of the acid gas is suitable for large-scale application.
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Description

technical field

[0001] The invention relates to a treatment method for acid gas, in particular to a 2 S and / or SO 2 A treatment method for recovering sulfur and purifying acid gas. Background technique

[0002] At present, the treatment of Claus process tail gas may contain SO 2 The method of acid gas mainly includes alkali washing method. Alkaline washing solution generally uses a certain concentration of Ca(OH) 2 or ammonia, the SO 2 Absorbed with lye, and then oxidized to generate sulfate.

[0003] The above method has large investment, complicated control and operation, and Ca(OH) 2 To absorb and generate calcium sulfite, it needs to be oxidized to generate gypsum, which has low desulfurization efficiency, excess gypsum products, long process and complicated equipment. In the industry, CaO is generally used to make Ca(OH) after grinding and other processes, through the preparation of slurry, multi-stage filtration and dilution. 2 Alkali washing solution, the calc...

Claims

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