Sulfur-loaded cocoanut active charcoal flue gas demercuration adsorbent and preparation method

A coconut shell activated carbon and adsorbent technology, which is applied in the field of sulfur-loaded coconut shell activated carbon flue gas mercury removal adsorbent and its preparation, can solve the problems that the flue gas concentration cannot be reached, and achieve fast speed, good desorption, strong desorption The effect of deactivation

Inactive Publication Date: 2017-10-03
ANHUI HANSHAN COUNTY TIANSHUN ENVIRONMENTAL PROTECTION EQUIP
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Problems solved by technology

With the gradual improvement of national environmental protection requirements, the concentration of flue gas emitted by the current sintering process will not meet the future national environmental protection emission standards, so it is necessary to further study low-concentration mercury flue gas treatment methods

Method used

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Embodiment Construction

[0016] A sulfur-loaded coconut shell activated carbon flue gas mercury removal adsorbent is characterized in that it adopts microwave heating technology, uses coconut shell activated carbon prepared by sodium sulfide chemical activation method as the matrix, and uses elemental sulfur to modify the coconut shell activated carbon to make sulfur-loaded Coconut Shell Activated Charcoal.

[0017] The preparation method of described a kind of sulfur-loaded coconut shell activated carbon flue gas mercury removal adsorbent is characterized in that, comprises the following steps:

[0018] (1) Dry and crush the coconut shell into particles with a length of 4-8mm, add a certain proportion of sodium sulfide aqueous solution with a mass fraction of 2% to impregnate and modify, filter and dry;

[0019] (2) Put the above materials into a microwave device, take them out after microwave heating for 10-15 minutes, and obtain coconut shell activated carbon;

[0020] (3) Crumble and screen the c...

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Abstract

The invention discloses a sulfur-loaded cocoanut active charcoal flue gas demercuration adsorbent and a preparation method. According to the sulfur-loaded cocoanut active charcoal flue gas demercuration adsorbent disclosed by the invention, waste coconut shell is utilized as a raw material, a full-novel thermal energy heating technology of microwave heating is utilized to enable dipolar molecules in the material to move in high frequency, and meanwhile, the inside and the outside of the material are heated and charred to obtain cocoanut active charcoal; compared with a traditional heating method, the active charcoal preparation method disclosed by the invention has quick speed, low energy consumption and high efficiency; then the prepared active charcoal and sulfur are activated and modified by microwave; on one hand, elemental sulfur can be loaded on the active surface; on the other hand, after microwave heating, the surface is rough and in a convex-concave shape, holes become slits extending inwards, and flue gas adsorption is greatly facilitated. The demercuration adsorbent prepared by the preparation method disclosed by the invention has high porosity and strong adsorption, not only has stronger removing effect on mercury in the flue gas, but also has better removing and adsorbing effects on heavy metal of Pb, cadmium and the like in the flue gas.

Description

technical field [0001] The invention relates to the technical field of flue gas demercuration, in particular to a sulfur-loaded coconut shell activated carbon flue gas mercury removal adsorbent and a preparation method. Background technique [0002] Mercury and its compounds as secondary dust, SO x , NO x The fourth largest pollutant after that has received more and more attention. Activated carbon flue gas injection is considered to be the most promising practical flue gas mercury removal technology, and it has been applied in municipal solid waste incineration plants. [0003] The mercury content in coal-fired flue gas is low, and the composition is complex. In addition to nitrogen, it also contains SO 2 , NO, HCl and other components, and change with the change of coal type, combustion mode, operating load and other conditions. The interaction between these components and the chemical reaction with mercury have a great influence on the mercury removal efficiency of ac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30B01D53/02
CPCB01D53/02B01J20/02B01J20/045B01J20/20B01J20/3078B01D2258/0283B01D2257/60B01D2257/602
Inventor 钟华梁明张兵
Owner ANHUI HANSHAN COUNTY TIANSHUN ENVIRONMENTAL PROTECTION EQUIP
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