Device and method for simultaneous desulfurization and denitrification of flue gas under synergistic effect of vacuum ultraviolet and available chlorine

A desulfurization, denitrification, and vacuum ultraviolet technology, which is applied in separation methods, chemical instruments and methods, gas treatment, etc., to achieve the effect of strengthening the mass transfer process, facilitating maintenance and repairing, and improving the utilization rate of ultraviolet rays.

Active Publication Date: 2018-10-26
HUAZHONG UNIV OF SCI & TECH
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, these methods still have room for improvement in terms of UV energy utilization, high-efficiency and long-life work of UV light sources, and UV collaboration with other process optimization.

Method used

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  • Device and method for simultaneous desulfurization and denitrification of flue gas under synergistic effect of vacuum ultraviolet and available chlorine
  • Device and method for simultaneous desulfurization and denitrification of flue gas under synergistic effect of vacuum ultraviolet and available chlorine
  • Device and method for simultaneous desulfurization and denitrification of flue gas under synergistic effect of vacuum ultraviolet and available chlorine

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example 1

[0080] A kind of method that VUV / UVC synergistic effective chlorine oxidation method is used for the simultaneous desulfurization and denitrification of flue gas, is raw material with air and NaClO absorbent, has following steps (such as Figure 4 shown):

[0081] 1) The air is transported into the transparent casing, under the action of 185nm VUV radiation, the O in the air 2 is excited to generate O 3 , ROS and other components. Air can be easily supplied by an air compressor or an air pump. The temperature of the compressed air is significantly lower than that of the flue gas, which can have a better cooling effect on the UV light source and the sleeve, thereby prolonging the life of the UV light source and maintaining the stability of the luminous efficiency. sex;

[0082] 2) Contains O 3 The air is introduced into the spray washing room, and the low concentration NaClO oxidant (concentration is 100~2000mg / L[Cl 2 ]) synergistic effect, exert desulfurization and denitr...

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Abstract

The invention discloses a device and method for simultaneous desulfurization and denitrification of flue gas under a synergistic effect of vacuum ultraviolet and available chlorine. The method and thedevice are characterized in that an ultraviolet source is adopted for simultaneous radiation of VUV and UVC, and oxygen source gas is subjected to photolysis through VUV waveband photons to generateO3 and ROS; then, the generated O3 and ROS are guided into flue gas and returns near to the ultraviolet source along with the flue gas to take UVC irradiation; an available chlorine oxidation absorbent is mixed in the flue gas, and O3, ROS and the available chlorine oxidation absorbent synergistically play a role in oxidation of NOx and SOx in the flue gas; photochemical reaction of O3 and an available chlorine component in the available chlorine oxidation absorbent is excited through UVC waveband photons to generate more active free radicals to further have reaction with NOx and SOx in the flue gas, so that NO and SO2 in the flue gas can be oxidized into nitrate and sulfate to realize simultaneous desulfurization and denitrification of flue gas.

Description

technical field [0001] The invention belongs to the technical field of air pollution prevention and control, and more specifically relates to a method and device for simultaneous desulfurization and denitrification of flue gas by a VUV / UVC synergistic effective chlorine oxidation method. Background technique [0002] With the development of human industrialization, the consumption of a large amount of fossil energy has produced a large amount of harmful gas emissions (such as NO x , SO x , PM, VOC, etc.). For example, land boilers, kilns, coal-fired power plants, ocean-going ships, etc. These large-scale emission sources excessively discharge harmful gases and cause serious damage to the atmospheric environment. Severe weather such as smog, photochemical smog, and acid rain have appeared in some areas. For this reason, in the past few decades, a large number of flue gas purification technologies have been proposed and used in production practice, such as selective catalyti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/76B01D53/56B01D53/50
CPCB01D53/007B01D53/50B01D53/56B01D53/76B01D2251/104B01D2251/108B01D2259/804Y02C20/10
Inventor 杨少龙向先波胡辉
Owner HUAZHONG UNIV OF SCI & TECH
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