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Flue gas demercuration system and method based on discharge and activation of halogen materials

A substance and halogen technology, applied in the field of environmental protection/waste gas purification, can solve the problems of low cost, reduce the cost of mercury removal, and improve the efficiency of mercury removal

Inactive Publication Date: 2014-03-12
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem of effectively removing gaseous mercury in flue gas, and to provide a flue gas mercury removal system and method with high efficiency and low cost, which uses electric discharge to activate halogen substances, oxidizes and removes gaseous mercury , can effectively remove mercury in flue gas

Method used

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  • Flue gas demercuration system and method based on discharge and activation of halogen materials
  • Flue gas demercuration system and method based on discharge and activation of halogen materials
  • Flue gas demercuration system and method based on discharge and activation of halogen materials

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Embodiment Construction

[0028] Such as figure 2 As shown, the mercury removal system of the present invention based on discharge activation of halogen substances includes a pretreatment device 2, a dust removal device 5, and an absorption device 8 that sequentially treat flue gas, and a halogen group is arranged between the pretreatment device 2 and the dust removal device 5. Material activation device 3. The dust removal device power supply 6 supplies power to the dust removal device 5, and the dust removal device 5 is also provided with a dust removal ash hopper 7.

[0029] The mercury-containing flue gas passes through a pretreatment device 2 such as a heat exchanger and then enters a halogen substance activation device 3, which adds halogen substances to the flue gas and mixes with the flue gas. The halogen substance activation device 3 efficiently activates the halogen substance under the condition of oxygen-containing gas, fully mixes and reacts with the halogen substance in the flue gas, and...

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Abstract

The invention discloses a flue gas demercuration system and method based on the discharge and activation of halogen materials. The system comprises a pretreatment device, a dedusting device and an absorption device which are used to treat the flue gas in turn, wherein a halogen material activation device is arranged between the pretreatment device and the dedusting device, and the halogen material activation device is provided with a nozzle and a discharge reactor. The halogen material activation device injects a halogen material in the flue gas, the halogen material is activated through high voltage discharge; and after the mercury in the elementary state, of the flue gas is converted to mercury in the oxidation state and mercury in the particulate state, dedusting and absorbing are performed to remove the mercury in the oxidation state and the mercury in the particulate state. The system disclosed by the invention can effectively utilize the existing flue gas purification device to reduce the demercuration cost and increase the demercuration efficiency and the dedusting efficiency.

Description

technical field [0001] The invention belongs to the technical field of environmental protection / exhaust gas purification, and in particular relates to a flue gas mercury removal system and method for oxidizing and removing gaseous mercury into easily removable forms by activating halogen substances through electric discharge. Background technique [0002] Mercury (Hg) pollutants are highly volatile and stable in nature, and can affect the human nervous system and kidney function, as well as pollute soil and water. Mercury has three forms in the gaseous state: elemental mercury Hg 0 (gaseous), oxidized mercury Hg 2+ (gaseous), particle-attached mercury Hg p (solid state). Hg 0 Volatile, not easily soluble in water, extremely difficult to remove in industrial processes, and Hg 2+ and Hg p Then it can be removed in the flue gas dedusting device and flue gas desulfurization (FGD) device downstream of the flue gas outlet, and the mercury element in the fossil fuel will be d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/74B01D53/64B01D53/18
Inventor 闫克平李树然刘振冯卫强王飞飞
Owner ZHEJIANG UNIV
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