Calcium/magnesium-based wet desulfurization and calcium/magnesium sulfite resource utilization system and process

A calcium sulfite and wet desulfurization technology, which is applied in sulfur compounds, separation methods, inorganic chemistry, etc., can solve the problems of small utilization radius, difficulty in storage and transportation of sulfuric acid, and secondary pollution, so as to reduce external dependence and alleviate Shortage of sulfur resources and the effect of resource utilization

Active Publication Date: 2021-05-28
SHANDONG UNIV
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Problems solved by technology

However, the high concentration of SO produced in the magnesium oxide regeneration stage in the current magnesium desulfurization process 2 The gas is used to make sulfuric acid
[0004] Sulfuric acid is difficult to store and transport, and its valuable utilization radius is small. If there is no suitable acid-using enterprise nearby, the sulfuric acid produced will be stored for a long time, which will cause secondary pollution

Method used

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  • Calcium/magnesium-based wet desulfurization and calcium/magnesium sulfite resource utilization system and process

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Embodiment Construction

[0040] It should be pointed out that the following detailed description is exemplary and is intended to provide further explanation to the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0041] It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and / or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and / or combinations thereof.

[0042] Such as figure 1 As shown, the calcium / magnesium-based wet desulfurization and calcium / magnesium sulf...

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Abstract

The invention discloses a calcium / magnesium-based wet desulfurization and calcium / magnesium sulfite resource utilization system and process. SO 2 React with calcium / magnesium-based desulfurization slurry to generate calcium / magnesium sulfite, and add oxidation inhibitors to the desulfurization slurry to inhibit the oxidation of calcium / magnesium sulfite to calcium / magnesium sulfate. For high concentrations of SO produced by calcium / magnesium sulfite roasting 2 The flue gas undergoes a reduction reaction at high temperature and is directly reduced to elemental sulfur vapor. After dust removal, temperature reduction, and fine dust removal processes, sulfur is recovered by the sulfur recovery device. Calcium / magnesium oxide is used as a desulfurizer and returned to the desulfurization tower for recycling.

Description

technical field [0001] The invention belongs to the field of resource utilization of desulfurization solid waste, and in particular relates to a calcium / magnesium-based wet desulfurization and calcium / magnesium sulfite resource utilization system and process. Background technique [0002] With the continuous improvement of my country's environmental protection requirements, the sulfur-containing flue gas discharged from coal-fired power plants, steel plants, etc. needs to be equipped with flue gas desulfurization devices, of which wet-type desulfurization units based on limestone-gypsum method account for about 85% of the total installed capacity . Although the limestone-gypsum desulfurization technology has the advantages of high desulfurization efficiency and stable operation, the problem that this desulfurization method is inconsistent with China's energy conservation, emission reduction, circular economy, and sustainable development policies has become increasingly promin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/80B01D53/50B01D53/96C01B17/04
CPCB01D53/502B01D53/80B01D53/96B01D2251/402B01D2251/404B01D2251/604B01D2258/0283C01B17/0482
Inventor 马春元夏霄崔琳张立强赵希强李军冯太张世珍
Owner SHANDONG UNIV
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