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Mercury removal method for flue gas

A technology of flue gas and mercury removal agent, which is applied in the field of flue gas mercury removal, and can solve the problems such as the adverse effect of hydrogen sulfide on the conversion process of sulfuric acid system

Active Publication Date: 2021-05-07
CHINA ENFI ENGINEERING CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0029] The main purpose of the present invention is to provide a method for removing mercury from flue gas, so as to solve the problem in the prior art that using sodium sulfide as a mercury removing agent is easy to generate excessive hydrogen sulfide and cause adverse effects on the conversion process of sulfuric acid system

Method used

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  • Mercury removal method for flue gas
  • Mercury removal method for flue gas
  • Mercury removal method for flue gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071]The mercaler mercaler of this embodiment includes the following steps:

[0072]Single tabular mercury in flue gas 80mg / nm3, Moisture in the flue gas is close to saturation, composite amarant adopts Na2S and NA2S2O3And the mixed solution is configured with water, the mass concentration of the compound divided by the mercury in the solution is 4%, and a high pressure injector is provided in the mercury reactor, and the flue gas is transferred into the reactor, and the flow rate is 1.5 m / s. The composite ammurne is inserted into the high pressure injector and is in contact with the flue gas. The injection pressure is 0.2 MPa, and the reaction temperature of the smoke ammiacal is 23 ° C.

Embodiment 2

[0074]The difference between the mercury mercury and the first embodiment provided in this example is:

[0075]The mass concentration of the compound divided by the mercury containing the compound divider is 5%.

Embodiment 3

[0077]The difference between the mercury mercury and the first embodiment provided in this example is:

[0078]The mass concentration of the compound divided by the mercury in a mixed solution containing a composite amarant agent is 25%.

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Abstract

The invention provides a method for removing mercury from flue gas. The mercury removal method includes the following steps: using a mercury removal agent to perform mercury removal treatment on the flue gas. During the mercury removal treatment process, the mercury removal agent reacts with sulfur dioxide in the flue gas to form sulfur element, and the sulfur element in the flue gas is treated. HG. The highly dispersed and highly active sulfur element produced during the reaction between the above-mentioned mercury removal agent and sulfur dioxide in the flue gas can more effectively react with the gaseous mercury in the flue gas to form mercury sulfide to be removed from the system, and the reaction formed Excess elemental sulfur can also be discharged from the system along with the product mercury sulfide. In this way, not only is it beneficial to remove mercury from the flue gas, but the existence of excess sulfur element also avoids the excessive concentration of hydrogen sulfide, thereby avoiding the negative impact of excessive concentration of hydrogen sulfide on the subsequent sulfuric acid system.

Description

Technical field[0001]The present invention relates to the field of smoke and mercury, in particular, to a mercury division of flue gas.Background technique[0002]At present, the use of smoke and mercury mercury, sodium sulfide, sodium sulfide, selenium filtration method, sulfuric acid washing method, potassium iodide, ozone method, SCR method, etc. are used for different flue gas conditions. Among them, the chloride method, iodine complex-electrolysis, sulfuric acid washing method, sulfur sulfide method are used in colored smelting. The main application characteristics of the main flue gas divide the mercury method are as follows:[0003]1 Chloride: also known as Boliden-Norzink deharmification method, the earliest to China is Boliden. This method is used to remove zero-carcurms in gaseous gases in the flue gas, can produce mercury or electrolysis. These two products are not stable enough, and they cannot be treated as ultimate products, and they must be further processed into other pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/79B01D53/64B01D53/50
CPCB01D53/502B01D53/507B01D53/64B01D53/79B01D2251/304B01D2251/404B01D2251/60B01D2251/608B01D2257/602B01D2258/0283
Inventor 王姣赵凯杜士帽马小乐
Owner CHINA ENFI ENGINEERING CORPORATION
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