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Synthesis method for elemental mercury sorbent

A synthesis method and adsorbent technology, applied in the field of energy and the environment, can solve the problems of lack of mercury control methods and technologies, and achieve the effects of easy operation, simple synthesis, and no harm to the environment

Active Publication Date: 2010-02-10
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there is still a lack of feasible mercury control methods and technologies in China

Method used

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  • Synthesis method for elemental mercury sorbent

Examples

Experimental program
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Effect test

example 1

[0021] The solvent is: deionized water

[0022] The modifier is: copper chloride

[0023] Copper chloride: attapulgite 1:3

[0024] Copper Chloride 7.9%

[0025] Measure 10g of copper chloride in the reactor, add 750ml of deionized water into the reactor and stir until it is completely dissolved, slowly add 30g of attapulgite of 325 mesh under constant stirring, vigorously stir for 2 hours at room temperature, filter, and the filtered The solid was dried at 70° C. for 10 hours and ground to 200 mesh to obtain an elemental mercury adsorbent modified by copper chloride attapulgite. The mass content of copper chloride in the elemental mercury adsorbent was measured to be 7.9%.

[0026] The adsorbent of the present invention is applied to the removal of elemental mercury in the tail gas of the power plant as follows: spray the adsorbent powder into the electrostatic precipitator or the bag filter, adjust the injection amount of the adsorbent according to the content of mercury i...

example 2～6

[0028] Examples 2-6 were prepared using the preparation method described in Example 1 according to the proportioning in the following table.

[0029]

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PUM

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Abstract

The invention discloses a synthesis method for an elemental mercury sorbent, comprising the steps that: a solvent and a modifying agent are added into a reactor, 20-50 meshes of attapulgite powder isadded subsequent to the dissolution of agents, 0.04-0.1 kg. of attapulgite are added into the solvent per liter, the mass ratio of the added modifying agent to the attapulgite is 1:3-1:50, and filtration and drying are implemented after uniform mixing, wherein, the solvent is deionized water, acetone, methanol or ethanol; the modifying agent is any one of the group consisting of copper chloride, sodium chlorate, potassium bromide, potassium iodide, calcium thioglycolate, cysteine, glutathione, dimercaptopyridine and 3-mercaptopropyltrimethoxysilane. The sorbent synthesized according to the method is natural mine, which is low in price, easy in acquirement and free from generating secondary pollution to environment and causing no influence on economical efficiency of fly ash in power plant;the used modifying agent is nontoxic and harmless, the synthesis for the sorbent is simple and easily operated, and the sorbent is obvious in removing elemental mercury and can reduce the concentration of the elemental mercury in smoke from coal-fired power plant by over 90% to be thereby harmless to environment during the production.

Description

technical field [0001] The invention belongs to the field of energy and environment, and specifically relates to a mercury adsorbent, which can remove elemental mercury in various mercury-containing tail gases, and is especially suitable for mercury removal in coal-fired power plants and garbage incineration plants without affecting fly ash use. Background technique [0002] Mercury is listed as a global pollutant by the United Nations Environment Program. It is the only chemical substance that has an impact on a global scale except for greenhouse gases. It has become one of the environmental pollutants of global concern. The combustion of fossil fuels is one of the main sources of mercury environmental pollution. Coal-fired mercury pollution has been recognized worldwide as another major pollution problem after coal-fired sulfur pollution in recent years, especially the control of mercury emissions from coal-fired power stations has become a hot spot in international resea...

Claims

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Application Information

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IPC IPC(8): B01J20/12B01J20/22B01J20/30B01D53/02B01D53/64
Inventor 张军营丁峰赵永椿郑楚光
Owner HUAZHONG UNIV OF SCI & TECH
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