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Coal-fired boiler smoke sulfur trioxide desorption device

A technology of sulfur trioxide and coal-fired boilers, which is applied in the direction of chemical instruments and methods, separation of dispersed particles, separation methods, etc., to achieve the effect of reducing costs, low cost, and convenient pumping

Inactive Publication Date: 2019-06-14
SOUTHEAST UNIV +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Purpose of the invention: In order to overcome the defects existing in the removal of sulfur trioxide produced in the existing SCR denitrification process, the present invention provides a sulfur trioxide removal device for coal-fired boiler flue gas

Method used

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  • Coal-fired boiler smoke sulfur trioxide desorption device

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Embodiment

[0026] Such as figure 1 A device for removing sulfur trioxide from flue gas of a coal-fired boiler includes a suspension preparation system and a suspension injection system.

[0027] The suspension preparation system is mainly composed of dispersant preparation tank 8, mill 4, SO 3 It consists of an adsorbent storage tank 6, a feeder 7, a suspension preparation tank 1, and a suspension storage tank 2. Dispersant preparation tank 8 is a configured dispersant solution, and the dispersant is sodium naphthalenesulfonate formaldehyde condensate. SO 3 In the adsorbent storage tank 6 is ground Na 2 CO 3 powder. SO in suspension preparation tank 1 3 Adsorbent A and dispersant solution are provided by feeder 7 and dispersant metering pump 9 respectively, solvent B is demineralized water, and an electric regulating valve is set on the solvent input pipeline to control the input of solvent; SO 3 Adsorbent A, solvent B and dispersant solution are uniformly mixed in the suspension ...

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Abstract

The invention discloses a coal-fired boiler smoke sulfur trioxide desorption device. The coal-fired boiler smoke sulfur trioxide desorption device comprises a suspension liquid preparation system anda suspension liquid injection system, wherein the suspension liquid preparation system comprises an SO3 adsorbent storage tank, a dispersing agent preparation tank used for preparing and storing a dispersing agent solution and a suspension liquid preparation tank, and the suspension liquid preparation tank is separately connected with two tank bodies and used for mixing and preparing the dispersing agent solution and an SO3 adsorbent into suspension liquid. The suspension liquid injection system comprises an air compressor and pneumatic two-fluid spray nozzles, one road input ends of the pneumatic two-fluid spray nozzles are connected with the air compressor, and the other road input ends of the pneumatic two-fluid spray nozzles are connected with an outlet of the suspension liquid preparation tank. The coal-fired boiler smoke sulfur trioxide desorption device can effectively remove sulfur trioxide in smoke, reduce the damage of the sulfur trioxide to an air preheater and other equipment, meanwhile, the defects of a traditional sulfur trioxide desorption device of an injection solution or dry powder are overcome, the cost of removing the sulfur trioxide can be reduced, the influence on the smoke temperature is reduced, and the efficiency of sufficiently removing the sulfur trioxide further can be ensured.

Description

technical field [0001] The invention relates to a sulfur trioxide removal device for coal-fired boiler flue gas, belonging to the field of air pollution prevention and control of coal-fired power plants. Background technique [0002] As the most mature NOx control technology, Selective Catalytic Redox (SCR) method has been widely used in the field of air pollution prevention and control of coal-fired power plants. The core of the SCR flue gas denitrification process is the catalyst, the most commonly used of which is V 2 o 5 -WO 3 / TiO 2 Honeycomb catalyst. However, in addition to promoting NOx reduction, this catalyst also catalyzes SO 2 oxidation reaction to produce SO 3 . SO 3 It is easy to react with the free metal oxides in the fly ash to form low-porosity sulfates that adhere to the surface of the catalyst and block the micropores of the catalyst. And the small particles of ammonium sulfate and ammonium bisulfate generated will cause corrosion and dust accumul...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/50B01D53/77
Inventor 黄亚继朱宣而郭学敏杨琪姜利连金方舟朱志成刘鑫雅戚二兵
Owner SOUTHEAST UNIV
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