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Oxidative acid dust-separation desulfurate denitration technology

A desulfurization, denitrification, and sulfur dioxide technology, which is applied in chemical instruments and methods, dispersed particle separation, separation methods, etc., can solve the problems of high initial investment and operation management costs, complex and huge systems, and difficult to handle, and achieves capital construction costs and operating costs. Reduced, simplified process flow, easy-to-handle effects

Inactive Publication Date: 2003-04-30
樊金鑫
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  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

At present, the flue gas desulfurization and dust removal technology of coal-fired furnaces, regardless of dry method or wet method, has complex and huge systems, high initial investment and operation management costs, and many products after dust removal and desulfurization are difficult to deal with, causing secondary pollution and other problems.

Method used

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Examples

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Embodiment Construction

[0032] Below in conjunction with embodiment the utility model is further described in detail:

[0033] The flue gas discharged from the coal-fired kiln is first treated with water spraying to cool down and remove dust, so that the sulfur dioxide and nitrogen monoxide in the flue gas can be dissolved in the washing water to the maximum extent under low temperature conditions.

[0034] SO 2 Soluble in water, the following reversible reactions occur:

[0035] --(1)

[0036] It can be known from (1) that to accelerate and increase SO 2 In order to improve the desulfurization efficiency by dissolving in the washing water, it is necessary to remove the hydrogen ions (H + ) and sulfite ion (SO 3 2- ) to break this balance.

[0037] We know that there are a lot of metal oxides in the fly ash produced by coal-fired boilers. Statistics of some coal types show that fly ash contains an average of 26% aluminum oxide, 7.2% iron oxide, 8.06% calcium oxide, 1.85% magnesium oxide,...

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PUM

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Abstract

An acidic oxidizing process for removing dust, sulfur and nitrogen from the fume of coal-burning furnace features that the fume is cooled and dusted by showering water and the SO2 and NO are dissolved in water, the oxygen is aerated in the water to increase its acidity, and in acidic condition, the metallic oxides in fume are dissolved in water and decomposed into ions to adsorb, dissolve and complex the SO2 and NO in fume, so removing dust, sulfur and nitrogen.

Description

technical field [0001] The invention relates to a dust removal, desulfurization and denitrification technology applied to flue gas of a coal-fired kiln—an oxidative acidic ash-dissolving dust removal desulfurization and denitrification technology. Background technique [0002] The acid-base neutralization method is widely used in the flue gas desulfurization and dust removal technology of coal-fired furnaces. General wet desulfurization, the first is SO 2 Soluble in water, the following reversible reactions occur: [0003] <chemistry num="005"> <chem file="01133328_cml001.xml" / > < / chemistry> --(1) [0004] It can be known from (1) that to accelerate and increase SO 2 Dissolving in washing water to improve desulfurization efficiency, the only feasible way is to remove hydrogen ions (H + ) and sulfite ion (SO 3 2- ) to break this balance. Acid-base neutralization desulfurization is to use alkali to remove H in water + , which reacts as: [0005] ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/78
Inventor 樊金鑫
Owner 樊金鑫
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