Oxidation sweetening and denitration method for hydroxyl radical of oxygen active particles injected in flue duct

Abstract

The invention discloses an oxidation sweetening and denitration method for hydroxyl radical of oxygen active particles injected in a flue duct, belonging to the technical field of gas ionization discharging, plasma chemistry and environmental engineering application. The invention is characterized in that the oxygen active particles (O<2+>, O3, O(<1>D), O(<3>P)) with the concentration of 80 to 400 mg/L are injected the flue, wherein the O<2+> reacts with the H2O in the flue gas to form the HO2<->initiator, and the oxygen active particles and the HO2<->initiator are subjected to the plasma reaction to form the.OH within the reaction time of 1 mu s to 1 ms. The.OH oxidizes and removes the SO2 and the NOx in the flue gas to generate the submicron acid mist with the reaction time of 1 to 1 s, then the charge coagulation is performed to collect the mixing acid liquid, and finally the sulfuric acid and the nitric acid are separated and purified by chemical methods, wherein the acid resource recovery rate is 50 to 98%. The invention has the effects and the advantages of solving the problems of the existing desulphurization and denitration method of the flue gas, realizing the novel recycling and dry desulphurization and denitration method without using catalysts, absorbent and reducing agents, and generating any re-contaminative by-product and any negative effect to the environment.

Description

technical field [0001] The invention belongs to the technical fields of gas ionization discharge, plasma chemistry and environmental engineering application, and relates to a method for oxidative desulfurization and denitrification of hydroxyl radicals by injecting oxygen active particles and initiators into a flue. Background technique [0002] 70% of my country's primary energy is coal, and SO is formed during coal combustion 2 , NO x Such gases lead to increasingly serious environmental pollution, and the existing technologies are difficult to meet the increasingly stringent emission standards. Therefore, many scholars have conducted exploratory research, and the research results have shown that the existing technologies have problems of varying degrees, and the gas ionization discharge method emerges from time to time. As early as 1971, Polk University in the United States conducted research on high-frequency pulse plasma chemical desulfurization, SO 2 conversion rate ...

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Problems solved by technology

[0010] The purpose of the present invention is to overcome the deficiencies of the existing gas ionization discharge flue gas desulfurization and denitrification method, and to provide a method for oxidative desulfurization and denitrification of hydroxyl radicals in which oxygen active particles are injected into the flue

The present invention solves t

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