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

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...

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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

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