Desulfurization and denitrification process utilizing microwave to intermittently irradiate activated carbon

Abstract

A method of a microwave intermittently liquid activated carbon desulfurization and denitrification. It is used to adsorb or microwave radiation treatment of boiler flue gas with two or more adsorption beds equipped with activated carbon particles., The adsorption bed enters the working state, and the sulfur nitrogen oxide in the flue gas in the activated carbon has the activated carbon inhalation of the active carbon suction to be saturated after the working state.The smoke adsorption of the bed, the recycled recycled state adsorption bed adopts microwave liquid liquid carbon particles, and sulfur nitrogen oxides that are adsorbed on the surface of the activated carbon surface are quickly restored to monocular sulfur and nitrogen by charcoal at high temperatures.Alternate cycle.In order to reduce the reduction of degradation temperature and reduce carbon loss, metal oxides were used as a reaction catalyst.The present invention can greatly reduce the energy consumption of microwave radiation, reduce the loss of carbon, and achieve the regeneration of activated carbon in situ. It has the characteristics of good removal effect, short activated carbon regeneration time, low removal cost, high recovery rate, and easy industrialization implementation.

Description

technical field [0001] The invention relates to a flue gas purification method, in particular to a method and device for desulfurization and denitrification of activated carbon by microwave intermittent irradiation, and belongs to the technical field of flue gas purification. Background technique [0002] For environmental protection and sustainable development, countries around the world have established increasingly stringent standards for the emission of sulfur dioxide and nitrogen oxides. 2 , NO X Emission requirements have been substantially increased. Through continuous technological innovation, it is an important way to solve the problem of flue gas pollution control by realizing high-efficiency and low-consumption flue gas pollution control. Flue gas desulfurization is currently the world's leading technology to control acid rain and SO 2 The most effective and main technical means of pollution. Its mainstream technology is limestone gypsum washing method, which ...

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Problems solved by technology

However, the common problems of the above-mentioned microwave desulfurization and denitrification technologies are as follows: 1. Activated carbon is continuously irradiated by microwaves, and the activated carbon continues to work at high temperatures, resulting in serious carbon loss; The operating cost is high, which affects the industrial implementation of this technology; 3. The catalyst selection needs to be improved, such as the patent CN101693162A discloses that CuCl is used as the catalyst, but there are difficulties in preparing CuCl, unstable chemical properties, and the presence of oxygen in the flue gas on CuCl. Oxidation, deliquescence due to its easy absorption of water vapor, etc., all of which damage its catalytic activity to varying degrees; 4. Under high temperature conditions, continuous microwave irradiation will cause oxygen in the flue gas to consume a large amount of activated carbon, thus making the process economical. poor

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