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Constant-temperature half-dry smoke purification method and system

A kind of flue gas purification, semi-dry technology, applied in the field of combustion equipment flue gas purification, normal temperature semi-dry flue gas purification, can solve problems such as unsatisfactory loading effect, achieve high loading and desulfurization effect, system pressure Low loss, high desulfurization and dust removal efficiency

Active Publication Date: 2012-02-15
TSINGHUA UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

This patent uses fly ash from pulverized coal furnace as the carrier of the desulfurizer. According to the existing laboratory test results, the carrier effect is not ideal

Method used

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  • Constant-temperature half-dry smoke purification method and system
  • Constant-temperature half-dry smoke purification method and system

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Embodiment Construction

[0017] The principle, structure and working process of the present invention will be further described below in conjunction with the accompanying drawings.

[0018] figure 1 It is a schematic structural diagram of an embodiment of a normal-temperature semi-dry flue gas purification system provided by the present invention. The system includes: a circulating fluidized bed reactor 3, a screw feeder 5 arranged on the circulating fluidized bed reactor, a cyclone separator 7 connected to the gas outlet of the circulating fluidized bed reactor, a dry-wet combined electrostatic Dust collector, sedimentation tank 13, stirring tank 17 and vacuum filter 19; dry-wet combined electrostatic precipitator is composed of dry electrostatic precipitator 10 and wet electrostatic precipitator 12; flue gas passes through circulating fluidized bed reactor 3, After the cyclone separator 7, the dry electrostatic precipitator 10 and the wet electrostatic precipitator 12, it is sent into the chimney 2...

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Abstract

The invention discloses a constant-temperature half-dry smoke purification method and system, relating to a removal method and system for sulfur oxide and dust in smoke discharged from combustion equipment. In the system, a circulating fluidized bed serves as a desulfuration reactor, quick hydration removal agent serves as desulfurizing agent, and a dry and wet combined electrostatic precipitator serves as dust removal equipment. The constant-temperature half-dry smoke purification system is characterized in that a cyclone separator is adopted to realize the material circulation of the quick hydration removal agent in a constant-temperature circulating fluidized bed reactor; the dry and wet combined electrostatic precipitator efficiently removes particles; and the wet electrostatic precipitator and the water for preparing the desulfurizing agent are reused to lower water consumption amount. The constant-temperature half-dry smoke purification system has the advantages of high desulfurization and dust removal efficiency and small system pressure loss. Compared with the wet-method desulfurization, the constant-temperature half-dry smoke purification system has the advantages of small water consumption amount and low investment and operation maintenance cost, and can be used for the smoke purification process of industrial boilers and power station boilers.

Description

technical field [0001] The invention relates to a method and device for purifying flue gas of combustion equipment, in particular to a method and system for purifying semi-dry flue gas at room temperature, and belongs to the technical field of flue gas purification. Background technique [0002] A large number of pollutants (such as sulfur oxides, nitrogen oxides, and dust) produced by combustion equipment have caused great harm to the atmospheric environment and human health. So far, coal-fired industrial boilers and power plant boilers mostly use wet flue gas desulfurization technology, and its desulfurization efficiency can reach 95%. Due to high investment and operation costs and high water consumption, the application of wet desulfurization technology is limited in some economically underdeveloped and water-short areas. Semi-dry flue gas desulfurization technology is one of low water consumption flue gas desulfurization technologies, for example, Chinese patents 011449...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/80B01D53/50
Inventor 由长福李元
Owner TSINGHUA UNIV
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