Demercuration absorption liquid

An absorption liquid and mercury removal technology, applied in the field of mercury removal absorption liquid, can solve the problems of complex absorption liquid composition, influence on mercury removal efficiency, environmental pollution, etc., and achieve easy post-processing, high mercury removal efficiency and wide liquid path Effect

Inactive Publication Date: 2014-06-25
HUANENG POWER INT INC +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above absorbing liquid can remove Hg in the flue gas 0 , but because the absorbing liquid contains a large amount of highly oxidizing inorganic salts or ions, when oxidizing and absorbing Hg 0 During the process, a large amount of reducing inorganic salts or ions will be generated, which will lead to the complexity of the absorption liquid composition during the mercury removal process and affect the mercury removal efficiency
At the same time, it is inconvenient to deal with the waste liquid after the absorption, which is easy to cause environmental pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] The mercury removal absorbing liquid of the present invention is formed by mixing 1-butyl-3-methylimidazole chloride and hydrogen peroxide, wherein the mass ratio of imidazole ionic liquid to hydrogen peroxide is 9:10.

[0016] The volume concentration of the hydrogen peroxide is 37%.

[0017] The preparation process of the chlorinated 1-butyl-3-methylimidazole is as follows: take a certain amount of 1-methylimidazole and 1-chlorobutane, then pack the 1-methylimidazole and 1-chlorobutane Put it into a three-necked flask with a reflux condenser, stir evenly, heat up to 80°C, and maintain it for 36 hours to make it react to obtain 1-butyl-3-methylimidazole chloride, wherein 1-methylimidazole and The molar ratio of 1-chlorobutane is 1 ∶ 1.

[0018] by N 2 , O 2 , SO 2 , and the Hg produced by the mercury permeation tube 0 Composition of simulated flue gas, in the range of room temperature to 55 ° C, the removal efficiency of the obtained absorption liquid for zero-va...

Embodiment 2

[0020] The mercury removal absorbing liquid of the present invention is formed by mixing 1-butyl-3-methylimidazole chloride and hydrogen peroxide, wherein the mass ratio of imidazole ionic liquid to hydrogen peroxide is 9:20.

[0021] The volume concentration of the hydrogen peroxide is 37%.

[0022] The preparation process of the chlorinated 1-butyl-3-methylimidazole is as follows: take a certain amount of 1-methylimidazole and 1-chlorobutane, then pack the 1-methylimidazole and 1-chlorobutane Put it into a three-necked flask with a reflux condenser, stir evenly, heat up to 80°C, and maintain it for 36 hours to make it react to obtain 1-butyl-3-methylimidazole chloride, wherein 1-methylimidazole and The molar ratio of 1-chlorobutane is 1 ∶ 1.

[0023] by N 2 , O 2 , SO 2 , and the Hg produced by the mercury permeation tube 0 Composition of simulated flue gas, in the range of room temperature to 55 ° C, the removal efficiency of the obtained absorption liquid for zero-va...

Embodiment 3

[0025] The mercury removal absorption liquid is characterized in that the mercury removal absorption liquid is formed by mixing 1-butyl-3-methylimidazole bromide and hydrogen peroxide, wherein the mass ratio of imidazole ionic liquid to hydrogen peroxide is 10:20.

[0026] The volume concentration of the hydrogen peroxide is 37%.

[0027] The preparation process of the brominated 1-butyl-3-methylimidazole body is as follows: a certain amount of 1-methylimidazole and 1-bromobutane are weighed, and then 1-methylimidazole and 1-bromobutane Put it into a three-necked flask with a reflux condenser, stir evenly, then raise the temperature to 80°C, and keep it for 36 hours to allow it to react to obtain 1-butyl-3-methylimidazole bromide, in which 1-methyl The molar ratio of imidazole to 1-bromobutane is 1 ∶ 1.

[0028] by N 2 , O 2 , SO 2 , and the Hg produced by the mercury permeation tube 0 Composition of simulated flue gas, in the range of room temperature to 55 ° C, the rem...

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PUM

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Abstract

The invention discloses a demercuration absorption liquid, wherein the demercuration absorption liquid is formed by mixing imidazolium ionic liquids and hydrogen peroxide with the mass ratio of 9: (10-20). The absorption liquid is high in efficiency, and has no pollution.

Description

technical field [0001] The invention belongs to the technical field of electric power environmental protection, and in particular relates to a mercury removal absorbing liquid. Background technique [0002] In recent years, coal-burning mercury pollution has been recognized as another major pollution problem after coal-burning sulfur pollution, which has attracted widespread attention from all over the world. Mercury removal from power plant flue gas has become a research hotspot in the field of power environmental protection. [0003] There are three main forms of mercury in flue gas: particulate mercury, divalent ion mercury and zero-valent mercury (Hg 0 ). Particulate mercury can be removed in the dedusting unit, and divalent ion mercury can be removed in the wet desulfurization unit. due to Hg 0 Volatile, insoluble in water, difficult to be captured by conventional air pollutant control equipment, therefore, Hg 0 The removal of mercury has become the focus and diffi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/77B01D53/64
Inventor 程广文张强
Owner HUANENG POWER INT INC
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