Coal-fired unit flue gas purification system

A technology of flue gas purification system and coal-fired unit, which is applied in the direction of gas treatment, chemical instruments and methods, and the use of liquid separation agents to achieve the effect of improving system redundancy and ensuring reliability and safety

Pending Publication Date: 2021-12-21
国能恒泰重庆发电有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

How to improve the existing flue gas treatment system and further improve the purification capacity of flue gas pollutants to meet the ultra-clean flue gas emission standards remains to be resolved

Method used

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  • Coal-fired unit flue gas purification system
  • Coal-fired unit flue gas purification system
  • Coal-fired unit flue gas purification system

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Embodiment Construction

[0029] The present invention will be further described below in conjunction with embodiment and accompanying drawing.

[0030] Such as figure 1 , a flue gas purification system for a coal-fired unit, comprising an absorption tower, an air inlet 3 is arranged at the bottom of the absorption tower, and an air outlet 4 is arranged at the top, an absorption desulfurization system is arranged inside the absorption tower, and the air inlet 3 will The incoming gas passes into the absorption desulfurization system, which is respectively connected with a limestone slurry supply system 10, a gypsum separation system 11 and an oxygen gas supply system 12, and a demisting device 8 is arranged above the absorption desulfurization system. The absorption tower comprises at least two primary absorption towers 1 and at least two secondary absorption towers 2, the air inlets 3 of the two primary absorption towers 1 are connected to the same flue flow channel A, and the two The gas outlet 4 of ...

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Abstract

The invention discloses a coal-fired unit flue gas purification system which comprises an absorption tower, a gas inlet is formed in the lower portion of the absorption tower, a gas outlet is formed in the top of the absorption tower, and an absorption desulfurization system is arranged in the absorption tower. Gas entering the absorption desulfurization system is introduced into the gas inlet through the gas inlet. The absorption desulfurization system is connected with a limestone slurry supply system, a gypsum separation system and an oxygen supply system, a demisting device is further arranged above the absorption desulfurization system, the absorption tower comprises at least two primary absorption towers and at least two secondary absorption towers, gas inlets of the two primary absorption towers are connected with the same flue gas flow channel, gas outlets of the two primary absorption towers are connected with the gas inlet end of the same primary purification gas flow channel, and the gas outlet end of the primary purification gas flow channel communicates with the gas inlets of the two secondary absorption towers. The flue gas ultra-clean treatment system has the beneficial effects that flue gas ultra-clean treatment can be achieved, meanwhile, the system has redundancy, and the reliability and safety of the whole purification system are guaranteed.

Description

technical field [0001] The invention belongs to the technical field of environmental protection and relates to boiler tail gas treatment, in particular to a flue gas purification system of a coal-fired unit. Background technique [0002] Thermal power plants that use coal as the main raw material are still the main source of electricity in my country. In recent years, policies, technology and industry have promoted coal-fired power generation emission reduction and environmental protection and efficiency enhancement technologies from various angles, such as desulfurization treatment process of coal fuel, transformation of coal-fired boilers to improve combustion efficiency, and new flue gas treatment process. Development has indeed achieved great results in reducing the pollution of thermal power plants, but there is still a lot of room for improvement. Especially with the improvement of environmental protection standards, thermal power plants are still facing greater envir...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/48B01D47/06B01D53/73B01D53/80B01D53/96
CPCB01D53/80B01D53/96B01D53/48B01D53/73B01D47/06B01D2251/404B01D2251/606B01D2258/0283
Inventor 张东贺峰何运忠罗毅马杰
Owner 国能恒泰重庆发电有限公司
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