Synergistic desulfurization and denitration agent, preparation and application thereof

Abstract

The invention discloses a synergistic desulfurization and denitration agent, preparation and application thereof. The synergistic desulfurization and denitration agent is prepared from the following raw materials by weight: 20-30 parts of a desulfurization agent, 40-50 parts of a denitration agent, 14-25 parts of a catalyst and 0.5-1 part of a dispersion suspending agent. The synergistic desulfurization and denitration agent is based on the denitration agent and the desulfurization agent, is assisted by the catalyst and the dispersion suspending agent, does not need flue gas pre-dedusting treatment, and realizes direct desulfurization and denitration of flue gas in a high-temperature furnace. NH2 free radicals generated in situ are used as a reducing agent to realize denitration, H2O generated in the denitration process further improves the contact between the desulfurization agent and SO2, thus promoting the desulfurization reaction, the desulfurization agent component is employed toabsorb a certain amount of NO2, the two parts play a synergistic role, and remarkably improve the desulfurization and denitration rate and effect of the flue gas, the reaction process can be basicallycompleted within 2s-5s, and the concentrations of SO2 and NOx in the treated flue gas meet the ultralow emission requirement. The preparation method of the product is simple in operation, is suitablefor industrial large-scale production, and the treatment cost is low, therefore the synergistic desulfurization and denitration agent can be widely applied to flue gas purification.

Description

technical field [0001] The invention belongs to the technical field of flue gas desulfurization and denitrification, and in particular relates to a synergistic desulfurization and denitrification agent and its preparation and application. Background technique [0002] With the rapid development of China's economy, people's demand for energy is increasing. my country's energy structure is still dominated by traditional fossil fuels, supplemented by solid waste energy conversion technologies such as waste incineration power generation, whose combustion will release a large amount of SO 2 and NO x Harmful gases, such as acid rain, photochemical smog, and ozone hole, have seriously affected the living environment of human beings. At present, higher requirements are put forward for the governance of the atmospheric environment. On the one hand, source prevention and process control must be carried out to reduce SO 2 and NO x and other harmful gas emission sources, and optimiz...

AI Technical Summary

Problems solved by technology

[0009] 1) In the traditional technology, desulfurization and denitrification are treated separately, the process is complicated, the equipment investment is large, and the maintenance cost is high;

[0010] 2) The flue gas of the existing simultaneous desulfurization and denitrification agent and technology must be pre-dusted, and the flue gas to be treated must still be introduced into a special reactor with a desulfurization and denitrification agent for flue gas purification. The desulfurization and denitrification agent is easy to be poisoned and must involve catalytic regeneration Disposal or replacement, high maintenance costs;

[0011] 3) The core material of the existing desulfurization and denitrification agent is inorganic material, which involves hazardous chemicals, has poor safety, and low purification reaction activity. It is necessary to circulate the reaction or prolong the residence time to improve the desulfurization and denitrification effect

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