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System and method for preparing denitrifying agent ClO2 from desulfurization byproducts

A technology for desulfurization by-products and by-products, applied in separation methods, chemical instruments and methods, gas treatment, etc., can solve the problems of difficult by-products and high production costs, and achieve low cost, reduced production costs, and reduced production costs Effect

Active Publication Date: 2020-08-25
CHINESE RES ACAD OF ENVIRONMENTAL SCI
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  • Abstract
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  • Claims
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Problems solved by technology

[0016] The object of the invention is to solve the problem of ClO in flue gas denitrification engineering application 2 Problems of high preparation cost and difficult to handle by-products

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  • System and method for preparing denitrifying agent ClO2 from desulfurization byproducts

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Embodiment Construction

[0039] The following is attached figure 1 The technical solution of the present invention is described in detail.

[0040] Such as figure 1 Shown, this embodiment provides a kind of desulfurization by-product preparation denitrification oxidizing agent ClO 2 The system includes a desulfurization tower 1, a concentration pool 2, a desulfurization slurry storage tank 3, a sodium chlorate solution storage tank 4, a chlorine dioxide generator 5, a chlorine dioxide absorption device 6, an automatic control device 7, and by-product recovery Device 8 and spray denitrification tower 9;

[0041] Among them, the flue gas and the ammonia desulfurization stock solution undergo an absorption reaction in the desulfurization tower 1, and the absorbed desulfurization slurry is concentrated in the concentration pool 2, and stored in the desulfurization slurry storage tank 3 after concentration;

[0042] The desulfurization slurry storage tank 3 is connected to the chlorine dioxide generator...

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Abstract

The system comprises a system for preparing a denitrifying agent ClO2 from desulfurization byproducts. The system comprises a desulfurization tower (1), a concentration tank (2), a desulfurization slurry storage tank (3), a sodium chlorate solution storage tank (4), a chlorine dioxide generator (5), a chlorine dioxide absorption device (6), an automatic control device (7), a byproduct recovery device (8) and a spraying denitration tower (9). The invention also discloses a method for preparing a denitrfying agent ClO2 from desulfurization byproducts. According to the system and the method, theproblem that an ammonia desulphurization byproduct (NH4) 2SO3 is difficult to oxidize and treat is solved, and meanwhile, the invention also provides a preparation method of the denitration agent ClO2by organically combining ammonia desulphurization and oxidation denitration; and the method is low in cost and can recycle the byproducts.

Description

technical field [0001] The invention belongs to the field of industrial air pollution control, and in particular relates to a method of using ammonium sulfite, a by-product of ammonia desulfurization, as a reducing agent to prepare denitrification oxidant ClO 2 Methods. Background technique [0002] Sulfur dioxide (SO 2 ) and nitrogen oxides (NO x ) is the main air pollutant and the main factor affecting air quality, while SO in the air 2 and NOx are also one of the important causes of smog, so the removal of SO in flue gas 2 and NOx urgently. [0003] Ammonia desulfurization process has become the main desulfurization technology because of its advantages of fast desulfurization speed, high efficiency and high economic value of desulfurization products. Ammonia desulfurization is the use of ammonia water to absorb SO in flue gas 2 Gas, first acid-base neutralization reaction, namely ammonia and SO 2 The reaction produces ammonium sulfite, which is a high-efficiency, l...

Claims

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Application Information

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IPC IPC(8): C01B11/02B01D53/76B01D53/56
CPCB01D53/56B01D53/76B01D2251/108B01D2258/0283C01B11/025
Inventor 张艳平张凡何学娟黄家玉王洪昌张浩王相凤王红梅石应杰王凡田刚谭玉玲龙红艳
Owner CHINESE RES ACAD OF ENVIRONMENTAL SCI