Sulfur-loaded heat regeneration method of active carbon mercury removal adsorbing agent

A technology of activated carbon and adsorbent, which is applied in the field of sulfur-loaded heat regeneration, can solve the problem that the activated carbon demercury adsorbent cannot be reused, achieve strong mercury adsorption performance and cycle regeneration characteristics, reduce industrial pollution, and simplify the production process.

Active Publication Date: 2018-09-28
DATANG ENVIRONMENT IND GRP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the disadvantage that the existing commercial activated carbon mercury removal adsorbents cannot be reused, the present invention provides a sulfur-loaded thermal regeneration method of activated carbon mercury removal adsorbents. Containing a large number of sulfur-containing functional groups, it has strong mercury adsorption performance and recycling characteristics

Method used

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  • Sulfur-loaded heat regeneration method of active carbon mercury removal adsorbing agent
  • Sulfur-loaded heat regeneration method of active carbon mercury removal adsorbing agent
  • Sulfur-loaded heat regeneration method of active carbon mercury removal adsorbing agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Weigh 100 mg of sample, crush and grind the activated carbon mercury removal adsorbent with an agate mortar, use a 160-mesh standard sieve to obtain a 160-mesh particle size; then mix it with 100 mg of sulfur and put it into a crucible; put the crucible into a quartz In the reaction tube, the quartz reaction tube is placed in the effective heating constant temperature zone of the tube furnace, and the high-purity N 2 Under the protection of the atmosphere, the tube furnace was raised from room temperature to 500 °C at a rate of 15 °C / min; the heating was stopped after the constant temperature was maintained for 1 hour, and it was taken out after cooling to room temperature to prepare the sulfur-loaded heat-regenerating activated carbon adsorbent for mercury removal. Process such as figure 1 shown.

[0044] Mercury removal performance test of the regenerated activated carbon adsorbent for mercury removal: the initial mercury removal efficiency was about 78.17%, and rema...

Embodiment 2

[0046] Weigh 100 mg of sample, crush and grind the activated carbon mercury removal adsorbent with an agate mortar, use a 250-mesh standard sieve to obtain a 250-mesh particle size; then mix it with 100 mg of sulfur and put it into a crucible; put the crucible into a quartz In the reaction tube, the quartz reaction tube was placed in the effective heating constant temperature zone of the tube furnace. Under the protection of the high-purity He atmosphere with a flow rate of 0.015m / s, the tube furnace heated up from the chamber at a rate of 10°C / min. The temperature was raised to 600°C; the heating was stopped after the constant temperature was kept for 1 hour, and it was taken out after cooling to room temperature to obtain a sulfur-loaded thermally regenerated activated carbon adsorbent for mercury removal.

[0047] Mercury removal performance test of the regenerated activated carbon adsorbent for mercury removal: the initial mercury removal efficiency was about 98.14%, and it...

Embodiment 3

[0049] Weigh 100 mg of sample, crush and grind the activated carbon mercury removal adsorbent with an agate mortar, use a 200-mesh standard sieve to obtain a 200-mesh particle size; then mix it with 100 mg of sulfur and put it into a crucible; put the crucible into a quartz In the reaction tube, the quartz reaction tube is placed in the effective heating constant temperature zone of the tube furnace. Under the protection of the high-purity Ne atmosphere with a flow rate of 0.02m / s, the tube furnace heats up from the chamber at a rate of 20°C / min. The temperature was raised to 700°C; the heating was stopped after the constant temperature was kept for 1 hour, and it was taken out after cooling to room temperature to obtain a sulfur-loaded thermally regenerated activated carbon adsorbent for mercury removal.

[0050] Mercury removal performance test of the regenerated activated carbon adsorbent for mercury removal: the initial mercury removal efficiency was about 92.38%, and it re...

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Abstract

The invention provides a sulfur-loaded heat regeneration method of an active carbon mercury removal adsorbing agent. The method includes the steps: uniformly mixing inactivated active carbon mercury removal adsorbing agents and sulfur elementary substances according to the weight ration of (0.5-2):1 to obtain mixture; keeping the constant temperature for 0.5-3h at the reaction temperature of 400-700 DEG C under inert gas atmosphere; stopping heating under protection of the inert gas atmosphere, and cooling mixture to reach indoor temperature to achieve sulfur-loaded heat regeneration of the active carbon mercury removal adsorbing agent. The method is simple in process and low in cost and has strong mercury adsorption property and cyclic regeneration characteristics, holes of regenerated adsorbing agents can be developed, and the surfaces of the regenerated adsorbing agents are rich in a lot of sulfur-containing functional groups.

Description

technical field [0001] The invention relates to the fields of coal-fired flue gas demercury removal and adsorbent recycling, in particular to a sulfur-carrying heat regeneration method for deactivated activated carbon demercury adsorbent by using sulfur simple substance. Background technique [0002] Emission of heavy metal mercury and its compounds as relay smoke and SO in coal-fired flue gas 2 and NO x Due to its strong migration, enrichment and potential acute toxicity in the atmosphere, it is the fourth largest pollutant, which is seriously harmful to the environment and human health. Mercury emissions from flue gas from coal-fired power stations are the main source of anthropogenic mercury emissions. As the world's largest coal producer and consumer, my country is facing extremely serious pressure on mercury pollution prevention and control. Flue activated carbon injection technology is considered to be the most promising coal-fired mercury removal technology at prese...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/34B01J20/20B01D53/02
CPCB01D53/02B01J20/3416B01J20/345B01J20/3483B01D2253/102B01D2258/0283B01D2259/40098B01D2257/602
Inventor 陶君段钰锋谷小兵李娜张若雨韦红旗李宇旭陈聪
Owner DATANG ENVIRONMENT IND GRP
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