Desulfurization and denitrification method and desulfurization and denitrification device

Abstract

The invention discloses a desulfurization and denitrification method and a desulfurization and denitrification device, relates to the field of separation and aims to provide a desulfurization and denitrification method and a desulfurization and denitrification device which are low in temperature requirement, rapid in oxidation speed and relatively low in cost, and meet the purposes of reducing difficulties and cost of desulfurization and denitrification and improving desulfurization and denitrification efficiency. According to the main technical scheme of the invention, the desulfurization anddenitrification method comprises the following steps: (1) mixing a flue gas with H2O2, catalyzing reactions with short-wave rays, oxidizing SO2 and aNOX in the flue gas to generate H2SO4 and HNO3, and collecting a flue gas after the reaction is completed, wherein the shortwave rays comprise one or more of ultraviolet rays, X rays and gamma rays; (2) collecting H2SO4 and HNO3 in the flue gas afterthe reactions, or converting H2SO4 and HNO3 into other products.

Description

technical field [0001] The invention relates to the field of separation, in particular to a desulfurization and denitration method and a desulfurization and denitration device. Background technique [0002] At present, the traditional denitrification methods include SCR, SNCR, and ozone. Selective Catalytic Reduction (SCR) or Selective Non-Catalytic Reduction (SNCR) denitrification technology combination, as well as ozone oxidation absorption denitrification technology, are applied in the front end of desulfurization, denitrification first and then desulfurization, two sets of equipment, two processes. [0003] When the selective catalytic reduction denitrification reaction temperature is 250-450°C, the denitrification rate can reach 70%-90%. This technology is mature and reliable, and is currently widely used in the world, especially in developed countries. However, this process requires a large investment in equipment, requires preheating of flue gas, expensive catalysts ...

AI Technical Summary

Problems solved by technology

The disadvantage is that it is difficult to find the spraying point, the spraying amount is not easy to control, and the denitrification rate is low, which has a certain impact on the operation and service life of the boiler

Ozone denitrification, although the denitrification rate is high, and can be carried out at low temperature, but the cost of ozone production is high, the auxiliary equipment is huge, and the investment and operation costs are high

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