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Forced oxidizing method and its device for smoke desulfurizing intermediate product-calcium sulfite

A technology of calcium sulfite and forced oxidation, applied in chemical instruments and methods, calcium/strontium/barium sulfite, separation methods, etc., can solve problems such as easy to be blocked by scaling, complex structure, high cost, etc. Reasonable position layout, sufficient forced oxidation, guaranteed effect

Active Publication Date: 2005-03-02
BEIJING GUODIAN LONGYUAN ENVIRONMENTAL ENG
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Problems solved by technology

[0003] The purpose of this utility model is to provide a method and device for forced oxidation of calcium sulfite, an intermediate product of flue gas desulfurization, to solve the problem of complex structure, high power consumption, high cost and easy to be blocked by scaling in existing forced oxidation devices. technical problem

Method used

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  • Forced oxidizing method and its device for smoke desulfurizing intermediate product-calcium sulfite
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  • Forced oxidizing method and its device for smoke desulfurizing intermediate product-calcium sulfite

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Embodiment Construction

[0026] For an implementation example, see the attached figure 1 , the bottom of the absorption tower 1 is a gypsum slurry pool 4, and the upper part is a reaction section. In the reaction section, the slurry is fully contacted with the flue gas through the spray system 2, and then demisted by the demister 3 to absorb sulfur dioxide in the flue gas. And react to generate calcium sulfite. The absorption tower is equipped with 2-3 sets of air spray guns 5, the air spray guns are inserted under the liquid surface of the slurry pool, and the hot air is blown into the slurry pool below the liquid surface through the oxidation air inlet 7, and the calcium sulfite in the slurry is fully oxidized by the oxygen in the air to form Dihydrate gypsum that can be dehydrated and comprehensively utilized. The side entry agitator 6 is fixed between the inner wall of the absorption tower 1 and the air spray gun 5 at an angle of 3°-30° to the horizontal direction. The output of the whole system...

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Abstract

The present invention provides forced oxidizing method and apparatus for calcium sulfite as the intermediate produce of desulfurizing fume. There are gypsum slurry pond in the bottom of the absorbing tower for desulfurizing reaction and storing slurry, oxidizing air generator outside the slurry pond and connected to two or three air spraying guns around the absorbing tower; air spraying guns inserted obliquely into the gypsum slurry to blow air into the slurry pond, and side stirrers between each of the air spraying gun outlets and the pond wall. The present invention has the advantages of simple and reasonable technological arrangement, low power consumption, full forced oxidation, etc.

Description

(1) Technical field [0001] The invention relates to a forced oxidation method of calcium sulfite in a wet flue gas desulfurization process of a thermal power plant and a device thereof. (2) Background technology [0002] Power plants and industrial boilers usually use fossil fuels such as coal and oil. Since these fossil fuels generally contain sulfur, harmful substances such as sulfur dioxide will be produced during the combustion process. In order to remove sulfur dioxide in boiler flue gas, limestone-gypsum wet flue gas desulfurization devices are widely used in large-scale power plant boilers. After the slurry in the slurry tank of the absorption tower absorbs sulfur dioxide in the flue gas, an intermediate product-calcium sulfite is first generated. , and then oxidize calcium sulfite with a large amount of oxygen to generate gypsum (calcium sulfate dihydrate) that can be comprehensively utilized. The forced oxidation method of existing calcium sulfite is as the inventi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/50B01D53/80C01F11/46C01F11/48
Inventor 刘汉强赵禹刘波陈玉乐
Owner BEIJING GUODIAN LONGYUAN ENVIRONMENTAL ENG
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