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Method of producing sulfuric acid using ammonic acid method to concentrate low concentration sulfur dioxide gas

A technology for the production of sulfur dioxide and gas, which is applied in chemical instruments and methods, inorganic chemistry, sulfur compounds, etc., and can solve the problems of inability to adopt two-rotation and two-suction process and large investment.

Inactive Publication Date: 2004-02-18
叶树滋
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the problem of reaction heat balance, the two-transformation and two-absorption process usually requires that the concentration of sulfur dioxide entering the conversion equipment should be greater than 7%. The lower the concentration, the greater the investment in conversion equipment. Turn to the two-suction process

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  • Method of producing sulfuric acid using ammonic acid method to concentrate low concentration sulfur dioxide gas
  • Method of producing sulfuric acid using ammonic acid method to concentrate low concentration sulfur dioxide gas
  • Method of producing sulfuric acid using ammonic acid method to concentrate low concentration sulfur dioxide gas

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Embodiment Construction

[0020] Such as figure 1 Shown, the amino acid method of the present invention enriches low-concentration sulfur dioxide gas to produce sulfuric acid method, is to extract out a part in the low-concentration sulfur dioxide gas according to calculation and enter ammonia absorption and concentrated sulfur dioxide generation device, the thick sulfur dioxide that draws and initial low-concentration sulfur dioxide The gas is mixed into 8% sulfur dioxide gas, and then passed into the purification equipment of the sulfuric acid plant, and then produced according to the two-turn and two-suction requirements of the pyrite sulfuric acid plant.

[0021] Low-concentration sulfur dioxide means that the content of sulfur dioxide is less than 4%. The raw material used to absorb low-concentration sulfur dioxide is ammonia water or ammonium bicarbonate aqueous solution.

[0022] The present invention will be further described below with the specific implementation method of producing sulfuric a...

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Abstract

A process for preparing sulfuric acid by ammonia-acid method to concentrate the low-concentration SO2 gas includes pumping part of low-concentration SO2 gas into an ammonia absorbing and high-concentration Co2 generating equipment, mixing the resultant high-concentration SO2 with original low-concentration SO2, adding to purifying unit, and conventional preparing sulfuric acid from troilite. Its advantage is less investment.

Description

technical field [0001] The invention relates to a method for producing sulfuric acid by using an acid method to enrich low-concentration sulfur dioxide gas. Background technique [0002] Sulfuric acid is an important industrial raw material, known as the "mother of industry", its output marks the national strength of a country. The raw materials for producing sulfuric acid mainly include sulfur, pyrite and non-ferrous metal smelting flue gas containing sulfur dioxide. When sulfuric acid and pyrite are used to produce sulfuric acid, they must be burned to produce about 8-9% sulfur dioxide gas and then processed into sulfuric acid. In the smelting process of non-ferrous metal ore, sulfur dioxide-containing gas is produced by-product, commonly known as smelting flue gas. The production of sulfuric acid creates the following two problems: [0003] 1. Due to the reduction of sulfur dioxide concentration, when the sulfuric acid output is the same, if smelting flue gas is to be ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B17/74C01B17/76
Inventor 叶树滋
Owner 叶树滋