Pulse corona plasma reaction and absorption catalysis desulfurization denitration method and device

Abstract

The invention discloses a desulfurization and denitration method of the reaction, adsorption and catalysis of pulse corona plasma. Flue gas enters a quenching and tempering tower (1); the flue gas after being regulated enters a plasma reactor (2); simultaneously, additive ammonia is added for the desulfurization and denitration; then the flue gas enters a material collector (3) to be collected; the flue gas discharged from the material collector (3) is preheated; and then the flue gas enters an adsorption and catalysis system (6) for the adsorption and catalysis, desulfurization and denitration. The device using the method comprises the quenching and tempering tower (1), the plasma reactor (2), the material collector (3) and an ammonia supplying system (4); the device also comprises a pre-heater (5) and the adsorption and catalysis system (6); and the pre-heater (5) is communicated with an air outlet of the material collector (3) and an air inlet of the adsorption and catalysis system (6). The desulfurization and denitration method of the reaction, adsorption and catalysis of pulse corona plasma enhances the threshing performance without secondary pollution, has simple structure and less investment, and can greatly enhance the capability of domestic dry desulfurization and denitration method of the reaction, adsorption and catalysis of pulse corona plasma.

Description

technical field [0001] The invention relates to a method and device for desulfurization and denitrification, in particular to a method and device for simultaneous desulfurization and denitrification of tail gas in power plants, metallurgy and petrochemical industry. Background technique [0002] Sulfur dioxide (SO 2 ) and nitrogen oxides (NO x ) is the main substance of air pollution, sulfur dioxide (SO 2 ) and nitrogen oxides (NO x ) is one of the main reasons for the formation of "acid fog" and "acid rain", which seriously endangers human health and causes serious damage to the natural environment. There are two main methods of desulfurization and denitration: wet method and dry method. The problem of wet desulfurization and denitrification method is that it consumes a lot of water, and must carry out advanced treatment of sewage. The application of a large amount of by-product gypsum is limited. The front of the chimney 6 needs to be heated to increase the temperature...

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Problems solved by technology

[0002] Sulfur dioxide (SO 2 ) and nitrogen oxides (NO x ) is the main substance of air pollution, sulfur dioxide (SO 2 ) and nitrogen oxides (NO x ) is one of the main reasons for the formation of "acid fog" and "acid rain", which seriously endangers human health and causes serious damage to the natural environment. There are two main methods of desulfurization and denitration: wet method and dry method. The problem of wet desulfurization and denitrification method is that it consumes a lot of water, and must carry out advanced treatment of sewage. The application of a large amount of by-product gypsum is limited. The front of the chimney 6 needs to be heated to increase the temperature. The disadvantages of the ammonia selective catalyst reduction method in this combined technology are that the maintenance of the denitrification catalyst life is troublesome, and the amine compounds generated in the method have the disadvantages of clogging the system, etc., so its popularization and application are affected.

The dry method overcomes the above-mentioned shortcomings of wet desulfurization and denitrification. Taking the pulsed corona plasma desulfurization and denitrification method as an example, it can simultaneously desulfurize and denitrate in one process, and the removal efficiency is high. The by-products ammonium sulfate and ammonium nitrate that can be produced can be It is used as chemical fertilizer, without waste, waste water and its treatment facilities. Because no catalyst is used, there is no problem of catalyst poisoning and affecting service life. The equipment has a simple structure, strong adaptability to changes in flue gas conditions, and is easy to control. It is simple and easy to realize, but the removal efficiency of domestic pulse corona plasma dry desulfurization and denitrification can only reach about 80%, which is not ideal enough, and it cannot meet the requirements of zero emission required by the environmental protection department, which restricts the domestic dry pulse power. Development of Halo Plasma Desulfurization and Denitrification Technology

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