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Additive capable of simultaneous desulphurization and demercuration and preparation method thereof

An additive and mercury removal technology, which is applied in separation methods, chemical instruments and methods, and separation of dispersed particles, can solve the problems of failure to significantly improve flue gas mercury removal efficiency, failure to popularize and apply, and high price of adsorbents. Desulfurization and mercury removal efficiency, good economic and social benefits, and the effect of enhancing mercury removal capacity

Active Publication Date: 2013-06-12
GUANGDONG ELECTRIC POWER SCI RES INST ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, in the flue gas treatment of power plants, mercury removal agent and desulfurization agent are used alone. The use of desulfurization agent can achieve higher desulfurization efficiency, especially the application of current desulfurization additives can effectively improve the limestone activity of the system and improve the scaling of the system. The problem of clogging, the desulfurization rate is as high as 99%, but it fails to significantly improve the efficiency of mercury removal from flue gas. The use of mercury removal agent alone can effectively improve the efficiency of mercury removal from flue gas, but the high price of the adsorbent itself leads to high operating costs, which cannot be promoted
Therefore, the current demercurants and desulfurizers are not able to solve the problems of fouling and clogging of WFGD systems and low mercury removal efficiency.

Method used

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  • Additive capable of simultaneous desulphurization and demercuration and preparation method thereof

Examples

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Effect test

Embodiment 1

[0020] Sodium benzoate, iron sulfate, adipic acid and o-phthalaldehyde are mixed according to a certain weight ratio, wherein, sodium benzoate is 40wt%, iron sulfate is 20wt%, adipic acid is 30wt%, and o-phthalaldehyde is 10wt%. Add water and stir to mix, heat in a water bath at 60°C with constant stirring to fully dissolve each component to obtain a composite solution, dry at 105°C for 24 hours, and cool to room temperature to obtain a desulfurization and mercury removal additive.

Embodiment 2

[0022] Sodium benzoate, iron sulfate, adipic acid and o-phthalaldehyde are mixed according to a certain weight ratio, wherein, sodium benzoate is 35wt%, iron sulfate is 22wt%, adipic acid is 32wt%, and o-phthalaldehyde is 11wt%. Add water and stir to mix, heat in a water bath at 60°C and keep stirring to fully dissolve each component to obtain a composite solution, dry at 105°C for 12 hours, and cool to room temperature to obtain a desulfurization and mercury removal additive.

Embodiment 3

[0024] Sodium benzoate, iron sulfate, adipic acid and o-phthalaldehyde are mixed according to a certain weight ratio, wherein, sodium benzoate is 42wt%, iron sulfate is 22wt%, adipic acid is 28wt%, and o-phthalaldehyde is 8wt%. Add water and stir to mix, heat in a water bath at 60°C with constant stirring to fully dissolve each component to obtain a composite solution, dry at 105°C for 20 hours, and cool to room temperature to obtain a desulfurization and mercury removal additive.

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Abstract

The invention discloses an additive capable of simultaneous desulphurization and demercuration. The additive comprises sodium benzoate, ferric sulfate, adipic acid and ortho-phthalaldehyde. The invention further discloses a preparation method for the additive capable of simultaneous desulphurization and demercuration. The additive can realize simultaneous desulphurization and demercuration, has high desulphurization and demercuration efficiency and has the advantages of improvement of activity of limestone, capacity of preventing fouling and blocking of a WFGD system and reduction of system energy loss.

Description

technical field [0001] The invention relates to an additive for desulfurization and mercury removal, in particular to an additive for simultaneous desulfurization and mercury removal. The invention also relates to a preparation method of the additive. Background technique [0002] The control of flue gas pollutants in coal-fired power plants has always been an important issue for power environmental protection. At present, the application of flue gas desulfurization, denitrification and dust collectors can make the flue gas basically meet the existing pollutant emission standards. Due to the characteristics of high desulfurization efficiency and wide applicability of wet desulfurization technology, more than 90% of coal-fired power plants in my country adopt wet limestone-gypsum (WFGD) for flue gas desulfurization. Mercury has serious physiological toxicity. The "Emission Standard of Air Pollutants for Thermal Power Plants" (GB 13223-2011) issued by my country in 2011 clear...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/80B01D53/50B01D53/64
Inventor 盘思伟唐念陈思维胡将军李丽赵宁
Owner GUANGDONG ELECTRIC POWER SCI RES INST ENERGY TECH CO LTD
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