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Device and method for preparing biomass carbon-based demercuration adsorbents

A biomass carbon and preparation device technology, applied in separation methods, chemical instruments and methods, and other chemical processes, can solve the problems of shortening biomass carbon-based mercury removal adsorbents, difficult large-scale production, and large heat consumption. Achieve the effects of improving practicability and economy, efficient removal, and optimizing overall performance

Inactive Publication Date: 2014-09-17
NANJING NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the defects of the prior art, the present invention proposes a fixed-bed biomass carbon-based mercury removal adsorbent preparation device, which integrates biomass pyrolysis, modifier solution impregnation and water vapor activation in a set of devices, thereby It effectively shortens the preparation process of biomass carbon-based mercury removal adsorbent, improves the production efficiency of mercury removal adsorbent, and solves the problems of large heat consumption, low yield, long cycle and Problems such as difficulty in large-scale production

Method used

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  • Device and method for preparing biomass carbon-based demercuration adsorbents
  • Device and method for preparing biomass carbon-based demercuration adsorbents

Examples

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Embodiment 1

[0035] A method for preparing a biomass carbon-based mercury-removing adsorbent. In this embodiment, peanut shells (PS) are used as raw materials, which are air-dried, crushed and sieved to produce peanut shell particles with a particle size of less than 1 mm.

[0036] Take by weighing about 50g peanut shell particle raw material and add to feeding bin 6, in N 2 Under the atmosphere, the temperature of the fixed bed body 2 was raised to 600°C, and then the feeding valve 5 was opened, and the raw material of peanut shell particles was quickly added into the fixed bed, and pyrolyzed for 10 min; Into N 2 , and use a telescopic rake to loosen the pyrolysis of the peanut shells, allow to cool to room temperature, turn off N 2 ; If it is taken out and dried (90°C) and crushed to less than 0.5 mm, the required peanut shell pyrolysis coke (PS600) can be obtained.

[0037] Turn on the constant flow pump 16, deliver the 3% KI modifier solution to the atomizing spray gun 18, and spray ...

Embodiment 2

[0040] The peanut shell pyrolysis coke (PS600), peanut shell impregnated coke (PS600-3%KI) and peanut shell steam activated coke (PS600-3%KI-A) obtained in Example 1 were selected for use in a fixed bed mercury adsorption test device To test its mercury adsorption performance. In the experiment, use N 2 To simulate flue gas, the total flow rate is 2 L / min, and the initial concentration of mercury is 30.2 μg / m 3 , the adsorption temperature is 140 °C, the adsorption time is 160 min, the adsorbent loading is 300 mg, and the superficial velocity is 19108 h -1 . The test results show that the unit mercury adsorption capacity of peanut shell steam activated coke (PS600-3%KI-A) and peanut shell impregnated coke (PS600-3%KI) in Example 1 are 29.14 μg / g and 27.42 μg / g respectively , which are 4.47 times and 4.22 times that of peanut shell pyrolysis (PS600), respectively.

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Abstract

The invention discloses a device and a method for preparing biomass carbon-based demercuration adsorbents. The device comprises a static bed system, a modifier solution supplying system, a vapor and nitrogen supplying system, a loading system, a draining system, a tail gas purifying system and corresponding connecting pipelines. According to the method, different types of biomass carbon-based demercuration adsorbents are prepared by virtue of processing processes of themolysis, modifier solution dipping, vapor activation and the like; by reasonably integrating the processes of the biomass themolysis, the modifier solution dipping and the vapor activation, the preparation processes of the biomass carbon-based demercuration adsorbents are effectively shortened, the production efficiencies of the demercuration adsorbents are improved, the problems of high heat consumption, low yield, long cycle, difficulty in realizing of large scale-production and the like in the preparation processes of the biomass carbon-based demercuration adsorbents are solved, the prepared adsorbents can be widely applied to the removal of the mercury in fuel coal and waste incineration smoke; the device and the method have remarkable economic, environmental and social benefits.

Description

technical field [0001] The invention relates to a preparation device and method for a biomass carbon-based mercury removal adsorbent, specifically an integrated mercury removal adsorbent preparation device based on a fixed bed for biomass pyrolysis, modifier solution impregnation and water vapor activation The invention and method belong to the technical fields of comprehensive utilization of biomass resources and flue gas mercury removal. Background technique [0002] Anthropogenic atmospheric mercury emissions mainly come from the combustion of coal and mercury-containing waste, metal mineral smelting, and mercury-related production industries (such as batteries, fluorescent lamps, etc.). At present, my country's annual anthropogenic atmospheric mercury emissions are about 500-600 tons, accounting for about 25% of the global anthropogenic atmospheric mercury emissions, of which flue gas mercury emissions from coal-fired power stations account for about 40% of atmospheric m...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/32B01D53/02
Inventor 卢平何楠布雨薇周菲李鹏王云山李静丹张文杰刘双鑫
Owner NANJING NORMAL UNIVERSITY
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