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Alkali-water desulphurization dust removal technology

A desulfurization and dust removal, process technology technology, applied in separation methods, chemical instruments and methods, use of liquid separation agents, etc., can solve the problems of reduced desulfurization effect, increased operating costs, and equipment can not operate normally, and achieves long gas-liquid contact time. , Not easy to scale and block, to ensure the effect of long-term operation

Inactive Publication Date: 2016-10-05
吴剑华
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The operation results show that the fouling of the tower wall and internal parts of the desulfurization tower, nozzle clogging, and equipment wear have not been well resolved. As a result, as the operating time increases, the desulfurization effect gradually decreases, and the operating cost increases. In severe cases, the equipment cannot operate normally.

Method used

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  • Alkali-water desulphurization dust removal technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The desulfurization and dust removal device used in Example 1 includes: gas-gas heat exchanger (1), tubular desulfurization reactor (2), gas-liquid separation and desulfurization tower (3), tubular oxidation reactor (4), oxidation gas-liquid Separator (5), chimney (6), connecting pipelines and intermediate tanks between equipment, gas delivery device, liquid delivery device, control and display instruments and accessories. Among them, the tubular desulfurization reactor (2) and the tubular oxidation reactor (4) are composed of straight pipes and curved pipes, the straight pipe part is a commercially available static mixer, and the curved pipe is an empty pipe; the gas-liquid separation and desulfurization tower (3 ), the upper and middle parts are equipped with demisters and multi-layer nozzles for atomizing the second desulfurizing agent, and the lower part is a gas-liquid separation space; a tubular desulfurization reactor (2) and a gas-liquid separation and desulfuriz...

Embodiment 2

[0028] Example 2 is basically the same as Example 1, except that the first desulfurizing agent used in this example is magnesium hydroxide slurry.

Embodiment 3

[0030] Example 3 is basically the same as Example 1, except that the tubular desulfurization reactor is equipped with chemical fillers.

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Abstract

The invention relates to an alkali-water desulphurization dust removal technology, and relates to a wet-method environment-friendly treatment technology for sulfur-containing smoke. The alkali-water desulphurization dust removal technology comprises the following steps: performing primary desulphurization dust removal by taking a sulfur-containing solution as a first desulphurization agent, performing the secondary desulphurization dust removal by adopting the water as a second desulphurization agent, performing the primary desulphurization dust removal in a tubular reaction device, and performing the secondary desulphurization dust removal in a tower-type device; and enabling the desulphurized dust-removed sulphite-containing mixed solution to enter an independent tubular oxidation reactor, and performing the oxidation reaction to obtain a sulfate mixed solution. By adopting the alkali-water desulphurization dust removal technology, the technical defects of the traditional wet-method desulphurization technology that a spray nozzle is blocked by scales formed on the inner wall and components in the desulphurization tower can be overcome, and the long-term operation of the device can be guaranteed; the equipment investment is low, the operation expense is low, the operation flexibility is high, the absorption, neutralization and oxidation are thoroughly carried out, and the desulphurization efficiency is high.

Description

technical field [0001] The invention relates to a flue gas desulfurization and dust removal technology, in particular to a wet flue gas desulfurization and dust removal technology with alkali participation. Background technique [0002] Wet flue gas desulfurization is currently the most widely used desulfurization technology at home and abroad. Its process generally includes flue gas pretreatment, absorption, neutralization, oxidation, oxidation solution treatment, demisting, purified gas reheating, by-product concentration and treatment, etc. . The most important equipment for wet desulfurization is the desulfurization unit, and tower equipment is the most widely used at home and abroad. The operation results show that the fouling of the tower wall and internal parts of the desulfurization tower, nozzle clogging, and equipment wear have not been well resolved. As a result, as the operating time increases, the desulfurization effect gradually decreases, and the operating co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/75B01D53/80B01D53/78B01D53/50B01D47/12
CPCB01D53/75B01D47/12B01D53/501B01D53/507B01D2251/402B01D2251/404
Inventor 吴剑华
Owner 吴剑华
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