Device and method combining wet urea desulfurization with wet heterogeneous Fenton-like denitration

Abstract

The invention relates to a device and method combining wet urea desulfurization with wet heterogeneous Fenton-like denitration. The device comprises a primary urea solution desulfurization system, a secondary heterogeneous Fenton-like wet denitration system and a solution circulating system. The device is provided with the primary urea solution desulfurization system, and a urea solution is utilized to efficiently remove SO2 and generate sulfite; through arrangement of the secondary heterogeneous Fenton-like wet denitration system, -OH generated by the catalytic decomposition of H2O2 is utilized to absorb NO; through arrangement of the solution circulating system, the utilization rate of an absorbent is increased, and sulfate is recycled at the same time. The problems of oxidant waste, NO oxidation efficiency reduction and the like caused by SO2 can also be avoided by removing SO2 and NOX in stages. By arranging the heterogeneous Fenton-like wet denitration system, the device solves the problem of low efficiency of traditional wet denitration, and a desulfurization and denitration mode for efficiently removing flue gas pollutants and recycling products in a liquid phase is established.

Description

technical field [0001] The invention relates to a urea wet desulfurization combined heterogeneous Fenton-like wet denitrification device and method, belonging to the field of energy and environmental protection. Background technique [0002] As the main energy source in our country, coal accounts for about 70% of the primary energy in our country, and the production and consumption of coal rank first in the world. SO is produced during the combustion of coal 2 , NO x , CO 2 , dust and trace heavy metals and other harmful substances, causing serious environmental problems such as acid rain, greenhouse effect, photochemical smog, smog and so on. Environmental problems caused by coal-burning pollution have become one of the important factors affecting the sustainable development of our country. At present, at home and abroad, flue gas is desulfurized and denitrated mainly through limestone-gypsum wet flue gas desulfurization process, selective non-catalytic reduction (SNCR)...

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Problems solved by technology

[0004] Aiming at the deficiencies in the prior art, the present invention provides a urea wet desulfurization combined with heterogeneous Fenton-like wet denitrification device and method to solve the problem of low denitrification efficiency in the wet desulfurization and denitrification process

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