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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 the fields of sulfur compounds, separation methods, inorganic chemistry, etc., can solve the problems of sulfuric acid storage and transportation difficulties, small utilization radius, secondary pollution, etc., to alleviate the shortage of sulfur resources, the vast Market prospects and the effect of reducing foreign dependence

Active Publication Date: 2019-03-22
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. SO2 reacts with calcium / magnesium-based desulfurization slurry to generate calcium / magnesium sulfite, and an oxidation inhibitor is added into the desulfurization slurry to inhibit oxidation of the calcium / magnesium sulfite into calcium / magnesium sulfate. Forhigh-concentration SO2 flue gas produced by roasting of the calcium / magnesium sulfite, the reduction reaction directly occurs at high temperature to reduce the flue gas into elemental sulfur vapor, and then the elemental sulfur vapor is recovered by a sulfur recovery device after being subjected to processes of dust removal, cooling and fine dust removal to obtain sulfur; calcium / magnesium oxideserving as a desulfurizing agent is returned to a 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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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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