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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

Inactive Publication Date: 2011-09-28
BEIJING FUNGHAN ENG CONSULTING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The above method has large investment, complicated control and operation, and Ca(OH) 2 Absorption to generate calcium sulfite requires oxidation 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 calcium sulfite oxidation process needs to be blown into air, and the atomizing nozzle equipment is easy to be blocked; the absorption with ammonia water needs to be oxidized to generate (NH 4 ) 2 SO 4 In the method of sulfate etc., the absorption tower circulation liquid volume is very large, and the tower diameter is thick, and in order to obtain (NH 4 ) 2 SO 4 Sulfate, etc., need to blow a large amount of air to force oxidation of sulfite and bisulfite, etc., the reaction speed is slow, and the use of ammonia water as the absorption liquid is easy to cause ammonia escape

Method used

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  • Processing method of acid gas
  • Processing method of acid gas
  • Processing method of acid gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] like figure 1 As shown, the acid gas 1 at about 40°C and the oxygen-containing gas from 9, such as air or pure oxygen, enter the sulfur production combustion furnace 2 for combustion, and after recovering part of the sulfur, the gas enters the secondary Claus converter 3 for further sulfur production. Recycling, Claus tail gas and hot air from 11 are incinerated in the incinerator 4, first preheated to 350°C, and then incinerated, the incineration temperature is 1100-1350°C, and the sulfur compounds are converted into SO 2 , including SO 2 Acid gas mixed with hot air from 11 enters SO 2 Go to SO 3 Converter 5 to achieve SO 2 to SO 3 conversion, in converter 5, the acid gas and the O in the hot air from 11 2 The reaction produces SO 3 , O 2 The dosage is based on the O in the acid gas discharged from the incinerator tail gas 2 and SO 2 The amount and concentration of oxygen, together with conventional techniques, can determine the theoretical amount of oxygen, t...

Embodiment 2

[0069] like figure 1 As shown, the acid gas 1 is incinerated in the incinerator 4 with the hot air from 11 without any sulfur recovery step. It is preheated at 400°C before incineration. The incineration temperature is 1100-1350°C, and the sulfur compounds are converted into SO 2 , including SO 2 Acid gas mixed with hot air from 11 enters SO 2 Convert SO 3 Converter 5 to achieve SO 2 to SO 3 conversion, in the converter 5, the acid gas and the O in the hot air from 11 2 The reaction produces SO 3 , O 2 The dosage is based on the O in the acid gas discharged from the incinerator tail gas 2 and SO 2 The amount and concentration of oxygen, together with conventional techniques, can determine the theoretical amount of oxygen, the actual excess of oxygen is about 15% by volume, SO 2 Go to SO 3 The catalyst adopts platinum catalyst metal platinum, and the space velocity is 4500h -1 , the reaction temperature is 400°C.

[0070] The SO containing 3 The gas enters the acid...

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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.

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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Application Information

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IPC IPC(8): B01D53/48B01D53/78B01D53/86F23G7/06C01B17/04
CPCB01D53/8615B01D53/002C01B17/775B01D2255/20723B01D2251/11C01B17/0404C01B17/0456
Inventor 王威宋夕平王伟
Owner BEIJING FUNGHAN ENG CONSULTING
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