Ozone oxidation and cracking excitation combined flue gas desulphurization denitration integrated apparatus and method

Abstract

The invention discloses an ozone oxidation and cracking excitation combined flue gas desulphurization denitration integrated apparatus and method. The apparatus comprises an ozone source, an oxidation reactor, a cracking excitation apparatus, a washing tower and a sewage treatment unit. Ozone generated from the ozone source is sent to the oxidation reactor, together with flue gas; extremely strong oxidizability of ozone is utilized to oxidize about half of NO to NO2; the cracking excitation apparatus can excite internal energy of almost all molecules; the activated molecules are conveyed to the washing tower and convert NOx in flue gas to nitrite and nitrate; SO2 is converted to sulfite and sulfate; and produced wastewater is conveyed to the sewage treatment unit for treatment, an alkaline circulation solution is refluxed to the washing tower for cyclic utilization, and clean air is externally exhausted. The desulphurization denitration efficiency is high, no nitrogenous wastewater or solid waste is generated, and the phenomenon of ammonia escape doesn't happen. The apparatus is good in safety, high in automation degree, good in temperature controllability, and saved in cost.

Description

technical field [0001] The invention relates to the field of environmental engineering waste gas treatment, in particular to an integrated device and method for flue gas desulfurization and denitrification induced by ozone oxidation combined with cracking. Background technique [0002] With the improvement of my country's economy and living standards, the public's requirements and concerns for the environment are getting higher and higher. Since 2010, smog and haze in large and medium-sized urban agglomerations have become more frequent and more severe, and the haze has occurred in a wider range. In recent years, the state has introduced strict pollutant discharge limits. In 2011, the Ministry of Environmental Protection of the People's Republic of China revised the "Emission Standards of Air Pollutants for Thermal Power Plants" (GB13223-2011), requiring that starting from July 1, 2014, the emission limits of soot, sulfur dioxide, and nitrogen oxides stipulated in the stand...

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Problems solved by technology

[0006] In order to solve the existing simultaneous desulfurization and denitrification technologies that produce high-concentration nitrogen-containing wastewater, high temperature requirements, and high costs, an integrated device and method for flue gas desulfurization and denitrification stimulated by ozone oxidation and cracking is now proposed, and the investment and operation costs Province, high desulfurization and denitrification efficiency, easy temperature control, no secondary pollution

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