New process for fume desulfurization

A new process and flue gas technology, applied in the separation of dispersed particles, chemical instruments and methods, separation methods, etc., can solve the problems of dust pollution, high operating costs, large investment in fixed facilities, etc., and achieve no dust pollution and low equipment investment. , The effect of avoiding salt mud pollution

Inactive Publication Date: 2003-07-16
SHANDONG HAIHUA GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the use of a large amount of high-quality lime in this method, and the lime solution prepared with lime is highly corrosive, the investment in fixed facilities is large, the operating cost is high, and dust pollution is likely to occur.

Method used

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  • New process for fume desulfurization
  • New process for fume desulfurization

Examples

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Embodiment 1

[0015] As shown in the accompanying drawings, the preferred embodiment of the present invention is implemented in the self-contained thermal power plant of the soda ash plant, because the soda ash plant is usually built on the seaside and has abundant seawater and salt mud resources. The desulfurization liquid is prepared by mixing the salt sludge produced by the soda ash factory with the seawater in a volume ratio of 1:2, and then the seawater and the desulfurization liquid are simultaneously pumped to the desulfurization tower in a volume ratio of 1:2. The flue gas in the desulfurization tower is inhaled for reaction, the liquid-gas ratio is controlled at about 1.5 liters / m3, and the reaction time is about 4 seconds. Finally, the reacted mortar water is directly pumped to the ash yard through a mortar pump.

[0016] The method firstly dilutes the salt mud with sea water, increases the fluidity of the salt mud, makes full use of the abundant sea water resources, and reduces t...

Embodiment 2

[0018] The desulfurization liquid is prepared by mixing the salt mud and seawater produced by the soda ash factory after producing soda ash in a volume ratio of 1:2.5, and then pumping the seawater and the desulfurization liquid into the desulfurization tower in a volume ratio of 1:1.5 at the same time. The flue gas in the desulfurization tower is inhaled for reaction, the liquid-gas ratio is controlled at about 1.0 liters / m3, and the reaction time is about 3 seconds. Finally, the reacted mortar water is directly pumped to the ash yard through a mortar pump.

Embodiment 3

[0020] The desulfurization liquid is made by mixing the salt mud and seawater produced by the soda ash factory after producing soda ash in a volume ratio of 1:1.5, and then pumping the seawater and the desulfurization liquid into the desulfurization tower in a volume ratio of 1:2.5 at the same time. The flue gas in the desulfurization tower is inhaled for reaction, the liquid-gas ratio is controlled to be about 1.3 liters / m3, and the reaction time is about 3 seconds. Finally, the reacted mortar water is directly pumped to the ash yard through a mortar pump.

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Abstract

A process for desulfurizing fume features that a mixture of seawater and salt mud is used as desulfurizing liquid, which is then pumped into the desulfurizing tower, where it reacts on fume, and the resultant ash sludging water is directly pumped to an ash field.

Description

technical field [0001] The invention relates to a desulfurization process for coal-fired flue gas. Background technique [0002] When coal is burned, a large amount of SO is produced 2 , SO 2 has become a major air pollutant. At present, the method of controlling coal-fired flue gas pollution is mainly to use lime liquor to react with flue gas to achieve the purpose of desulfurization and dust removal. However, this method uses a large amount of high-quality lime, and the lime liquid prepared with lime is highly corrosive, so the investment in fixed facilities is large, the operating cost is high, and dust pollution is easily generated. On the other hand, the production of basic chemical products such as soda ash requires a lot of energy, which usually comes from self-contained thermal power plants. Coal-fired flue gas desulfurization and dust removal are also an important task for environmental protection in these self-contained thermal power plants. The soda ash factor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/50B01D53/80
Inventor 侯云华顾强冯立信赵卫国
Owner SHANDONG HAIHUA GRP CO LTD
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