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A method and device for simultaneous desulfurization, denitrification and particulate matter removal of hypochlorite based on ultraviolet radiation enhancement

A technology for hypochlorite, desulfurization and denitration, which is applied in chemical instruments and methods, combined devices, separation devices, etc., can solve the problems of high plasma energy consumption, complex plasma generators, and easy fouling, blocking and deactivation of catalyst surfaces.

Active Publication Date: 2017-12-29
聚方(大连)环保技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example: Publication No. CN103191628A "Sodium Alkali Method Chemical Absorption - Non-thermal Discharge Simultaneous Desulfurization and Denitrification System", through the combination of non-thermal plasma discharge pre-oxidation and sodium-alkali absorption technology, the purpose of simultaneous desulfurization and denitrification of flue gas is achieved, but this method exists Problems such as high plasma energy consumption and complex plasma generator; Publication No. CN103349907A "Flue Gas Desulfurization and Denitrification System" and Publication No. CN101053750 "A Method for Combined Desulfurization and Denitrification of Flue Gas", using photocatalytic oxidation method to oxidize NO in flue gas , but due to the complex preparation process of the photocatalyst, and the surface of the catalyst is easily dirty and deactivated during the gas-solid reaction process, the desulfurization and denitrification efficiency of the catalyst is limited; the publication number CN204275786 "A Device for Desulfurization and Denitrification of Flue Gas" discloses a method based on electron accelerator and ultraviolet light The irradiation reactor with the combined action of the generator realizes NO oxidation and denitrification, which reduces the power consumption of the traditional simple electron beam denitrification, but the complexity of the system increases accordingly, and the difficulty of operation and management increases; Publication No. CN204365118 "A Photo-excited Ozone Combined Simultaneous desulfurization and denitrification system by wet scrubbing" discloses a method based on the generation of strong oxidizing atomic oxygen by ozone under the excitation of ultraviolet light to desulfurize SO in flue gas 2 and NO oxidation to gaseous products with high solubility, and then wet scrubbing and absorption technology. The removal process of this technology is clean and environmentally friendly, but with the increase of ozone consumption, the power consumption of the device will increase significantly

Method used

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  • A method and device for simultaneous desulfurization, denitrification and particulate matter removal of hypochlorite based on ultraviolet radiation enhancement
  • A method and device for simultaneous desulfurization, denitrification and particulate matter removal of hypochlorite based on ultraviolet radiation enhancement
  • A method and device for simultaneous desulfurization, denitrification and particulate matter removal of hypochlorite based on ultraviolet radiation enhancement

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Embodiment 1

[0067] A method for simultaneously desulfurizing, denitrifying, and departiculate matter based on hypochlorite enhanced by ultraviolet radiation has the following steps:

[0068] S1, the hypochlorite aqueous solution forms an atomized aerosol;

[0069] The atomized aerosol obtained in S2 and S1 is irradiated with ultraviolet light, and the hypochlorite in the atomized aerosol undergoes a photodecomposition reaction to generate strong oxidizing ROS free radicals;

[0070] The atomized aerosol obtained in S3 and S2 is fully mixed with the flue gas, and the low-valence harmful gas in the flue gas is oxidized into a high-valence gaseous product or the corresponding oxysalt, and the fine particles in the flue gas are absorbed by S2 The atomized aerosol adsorption that obtains in;

[0071] S4. The flue gas treated by S3 and the atomized aerosol after the reaction of S3 are wet-washed to absorb the atomized aerosol and the high-valence gaseous products oxidized from low-valence harm...

Embodiment 2

[0081] The difference between this embodiment and the simultaneous desulfurization, denitrification and particle removal method of hypochlorite based on ultraviolet radiation enhancement disclosed in Example 1 is that the solute of the hypochlorite aqueous solution is Ca(ClO) 2 , the solute mass fraction of the hypochlorite aqueous solution is 0.5%, the colloidal particle size of the atomized aerosol is 55 μm, and the ultraviolet light irradiation time in the step S2 is 2.5 s.

Embodiment 3

[0083] The difference between this embodiment and the simultaneous desulfurization, denitrification and particulate matter removal method of hypochlorite based on ultraviolet radiation strengthening disclosed in Example 1 is that the solute of the hypochlorite aqueous solution is NaClO, Ca(ClO) 2 Mixing with KClO, among them, NaClO, Ca(ClO) 2The mass ratio with KClO is 1:1:1, the solute mass fraction of the hypochlorite aqueous solution is 1%, the colloidal particle diameter of the atomized aerosol is 100 μm, and the ultraviolet light irradiation described in the step S2 The time is 5s.

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Abstract

The invention discloses a method for simultaneous desulfurization, denitrification and particle removal of hypochlorite based on ultraviolet radiation enhancement, which has the following steps: the atomized aerosol formed by the hypochlorite aqueous solution is irradiated with ultraviolet light, and the atomized aerosol The photolysis reaction of hypochlorite generates strong oxidizing ROS free radicals, and the atomized aerosol containing strong oxidizing ROS free radicals is fully mixed with the flue gas. The treated flue gas and the reacted atomized aerosol are wetted Washing treatment, the treated flue gas is discharged into the atmosphere after removing water mist by a demister. The invention also discloses a hypochlorite simultaneous desulfurization, denitrification and particle removal device based on ultraviolet radiation strengthening. The invention adopts the ultraviolet light irradiation method to significantly strengthen the desulfurization and denitrification effect of hypochlorite, and the mixed reaction between the atomized aerosol and the harmful gas in the flue gas greatly enhances the gas-liquid contact area, improves the gas-liquid mass transfer efficiency, and the ultraviolet light reaction The device reduces the system complexity and the difficulty of installation and operation, and reduces the initial investment cost of the system.

Description

technical field [0001] The invention belongs to the technical field of air pollution prevention and control, and in particular relates to a method and device for simultaneously desulfurizing, denitrifying and departiculate matter based on hypochlorite enhanced by ultraviolet radiation. Background technique [0002] During the combustion of fossil fuels, a large amount of harmful gases (such as SO 2 , NO, NO 2 , PM, HC, etc.) have caused serious pollution to the atmospheric environment. With the development of industrialization, a large amount of harmful gases emitted by burning fossil fuels accumulate year by year, causing regional air pollution problems to become more and more obvious. Severe weather such as acid rain, photochemical smog, and haze frequently occurs in some areas, endangering human health and ecological balance. . [0003] According to statistics from the Ministry of Environmental Protection of my country, in 2013, SO 2 The emissions are 20.439 million t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/76B01D53/60B01D50/00
CPCB01D53/60B01D53/76B01D2259/10B01D2247/107B01D50/60
Inventor 韩志涛杨少龙潘新祥于景奇杜还夏鹏飞郑德康宋永惠董景明严志军
Owner 聚方(大连)环保技术有限公司
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