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Method of treating sulfur-containing tail gas

A treatment method and a technology for tail gas, which are applied in separation methods, chemical instruments and methods, and dispersed particle separation, etc., can solve the problems of difficult recovery and treatment of by-products, low efficiency of desulfurization technology, and low economic value, and achieve good economic benefits. and social benefits, avoid dealing with problems, and absorb good effects

Inactive Publication Date: 2013-04-03
GUIZHOU KAILIN GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a treatment method for sulfur-containing tail gas, which solves the problems of low efficiency, high processing cost, difficult recovery and treatment of by-products, low economic value, and easy pollution caused by the current desulfurization technology for treating sulfur-containing tail gas.

Method used

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Examples

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Effect test

Embodiment 1

[0036] Mix 1Kg of iodine element with a particle size of 200 mesh and 20Kg of water to prepare a washing liquid, place it in a circulating washing tank, and pass through the lower end of the circulating washing tank with a temperature of 40 ° C and SO 2 The gas with a content of 1500mg / L is washed countercurrently under the action of the circulating washing pump. After washing, the gas is detected by SO 2 The content is 8mg / L.

Embodiment 2

[0038] Fully stir and mix 20Kg of iodine elemental substance with a particle size of 250 mesh and 280Kg of water to prepare a washing liquid, put the washing liquid into the circulating washing tank, and pass SO into the circulating washing tank 2 The gas with a content of 2400mg / L is circulated and washed in the tank under the action of the circulating washing pump, and the exhaust gas after washing is detected by SO 2 The content is 8mg / L.

Embodiment 3

[0040] 25Kg of iodine element with a particle size of 200 mesh and 270Kg of water are fully stirred and mixed evenly to prepare a washing liquid, which is mixed with SO in a circulating washing tank 2The gas with a content of 2400mg / L is countercurrently washed, and at the same time, hydrogen peroxide is passed into the circulating washing tank at a rate of 1.5Kg per hour, and the exhaust gas after washing is analyzed for SO 2 The content is 5mg / L.

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Abstract

The invention discloses a method of treating sulfur-containing tail gas, which mainly comprises the following steps of: (1) crushing elemental iodine to the particle size of above 200 meshes, and preparing a mixed liquor by using water; (2) putting the prepared iodine mixed liquor into a circulation washing tank; (3) introducing the sulfur-containing tail gas into a washing system, and carrying out reaction to obtain a mixed solution; (4) introducing hydrogen peroxide into the mixed solution so that the mixed solution turns into a mixed liquor of the elemental iodine, hydrogen iodine and sulfuric acid, and putting the mixed liquor into an iodine regeneration tank after the sulfuric acid reaches a certain concentration; (5) adding the hydrogen peroxide into the iodine regeneration tank to produce the elemental iodine and the sulfuric acid; and (6) filtering and separating the elemental iodine and sulfuric acid, and recycling the elemental iodine and sulfuric acid. With the adoption of the method, the washing efficiency is high, the washing cost is low, the treatment efficiency of the sulfur-containing tail gas is good, sulfur dioxide is directly transformed into sulfuric acid after treatment, a by-product does not exist, and economic and social benefits are good.

Description

technical field [0001] The invention relates to a treatment method for sulfur-containing tail gas, which belongs to the technical field of chemical industry. Background technique [0002] In the prior art, the production of sulfuric acid mostly adopts the two-turn-two-suction process. The content of sulfur dioxide in the tail gas of this process is high, and the normal value is 700-960mg / m 3 , serious environmental pollution. my country's sulfur dioxide emission standard for sulfuric acid tail gas was once implemented in accordance with the "Comprehensive Emission Standard for Air Pollution" GB16297-1996. Enterprises must further reduce the sulfur dioxide in the tail gas. For this reason, the Ministry of Environmental Protection and the General Administration of Quality Supervision, Inspection and Quarantine jointly promulgated the "Sulfuric Acid Industrial Pollution Discharge Standard" GB26132-2010, which was implemented on March 1, 2011. This standard reduces the standar...

Claims

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Application Information

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IPC IPC(8): B01D53/79B01D53/50B01D53/96
Inventor 徐魁穆劲魏发展杨龙廖吉星
Owner GUIZHOU KAILIN GRP CO LTD
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