Regeneration method of mercury removal adsorbent

An adsorbent and mercury removal technology, which is applied in separation methods, filter regeneration, chemical instruments and methods, etc., can solve the problems of poor effect, high cost and complicated process of mercury removal adsorbent regeneration technology, and achieve the goal of maintaining mercury removal capacity, avoiding waste of resources, and recovery of surface active components

Pending Publication Date: 2021-04-16
DATANG ENVIRONMENT IND GRP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is a regeneration method of mercury removal adsorbent, which solves the problems of poor effect, complicated process and high cost of the existing regeneration technology of mercury removal adsorbent

Method used

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  • Regeneration method of mercury removal adsorbent
  • Regeneration method of mercury removal adsorbent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Take out the mercury-removing adsorbent after absorbing elemental mercury in Comparative Example 1, weigh 40 mg of the sample and put it into the crucible, put the crucible into the quartz reaction tube, and let it flow under the nitrogen gas with a volume ratio of 1:1 at a flow rate of 0.02 m / s. Under the atmosphere of mixed gas with oxygen, the tube furnace was raised from room temperature to 300 °C at a rate of 15 °C / min, kept at a constant temperature for 2 hours, then stopped heating, cooled to room temperature and taken out to prepare a thermally regenerated metal oxide mercury removal adsorbent . Applied to mercury removal: the initial mercury removal efficiency is about 94.62%, and it remains at about 46.37% after 240 minutes.

Embodiment 2

[0038] Take out the mercury-removing adsorbent after absorbing elemental mercury in Comparative Example 1, weigh 40 mg of the sample and put it into the crucible, put the crucible into the quartz reaction tube, and let it flow under the nitrogen gas with a volume ratio of 1:1 at a flow rate of 0.02 m / s. Under the atmosphere of mixed gas with oxygen, the tube furnace was raised from room temperature to 400 °C at a rate of 15 °C / min, kept at a constant temperature for 2 hours, then stopped heating, cooled to room temperature and taken out to prepare a thermally regenerated metal oxide mercury removal adsorbent . Applied to mercury removal: the initial mercury removal efficiency is about 97.87%, and it remains at about 62.97% after 240 minutes.

Embodiment 3

[0040] Take out the mercury-removing adsorbent after absorbing elemental mercury in Comparative Example 1, weigh 40 mg of the sample and put it into the crucible, put the crucible into the quartz reaction tube, and let it flow under the nitrogen gas with a volume ratio of 1:1 at a flow rate of 0.02 m / s. Under the atmosphere of mixed gas with oxygen, the tube furnace was raised from room temperature to 500 °C at a rate of 15 °C / min, kept at a constant temperature for 2 hours, then stopped heating, cooled to room temperature and taken out to prepare a thermally regenerated metal oxide mercury removal adsorbent . Applied to mercury removal: the initial mercury removal efficiency is about 95.31%, and it remains at about 47.23% after 240 minutes.

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Abstract

The invention relates to the technical field of adsorbent regeneration, particularly to a regeneration method of a mercury removal adsorbent. The regeneration method of the mercury removal adsorbent comprises the following steps: placing an inactivated mercury removal adsorbent in a heating constant-temperature area of a tubular furnace; heating the inactivated demercuration adsorbent in the atmosphere of nitrogen, air or mixed gas of nitrogen and oxygen, and keeping the temperature constant; and cooling the inactivated demercuration adsorbent in the atmosphere of nitrogen, air or mixed gas of nitrogen and oxygen to obtain the regenerated demercuration adsorbent. According to the invention, the problems that an existing mercury removal adsorbent is poor in regeneration technical effect, complex in process and high in cost are solved.

Description

technical field [0001] The invention relates to the technical field of adsorbent regeneration, in particular to a regeneration method for a mercury-removing adsorbent. Background technique [0002] Coal resources will remain an important part of my country's energy structure for a relatively long period of time in the future, and the environmental pollution problems it brings will become more severe, and the demand for clean coal utilization will be more urgent. 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 atmospheric migration, enrichment and potential acute toxicity, it is increasingly harmful to the environment and human health. Therefore, the research and development of cost-effective mercury-removing adsorbents for coal-fired power plants with my country's independent intellectual property rights can not only effectively reduce the harm of mercury pollutants to the ecological environment an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/34B01J20/06B01D53/10
Inventor 陶君段钰锋谷小兵吴响李娜
Owner DATANG ENVIRONMENT IND GRP
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