Catalyst component and method for removing sulfur oxides and nitric oxides from smoke

Abstract

The invention discloses a catalyst component and method for removing sulfur oxides and nitric oxides from smoke. The smoke containing the sulfur oxides and the nitric oxides passes through a fluidized bed reactor with a nitric oxide removing reducing agent, a catalyst and a calcium-based adsorbing material so as to remove the sulfur oxides and nitric oxides from the smoke, wherein the catalyst comprises a fluid catalytic cracking dead catalyst playing a main catalyst role and an auxiliary catalyst playing an auxiliary catalyst role; and the nitric oxide removing reducing agent is a solid carbon reducing agent, and the calcium-based adsorbing material is calcined lime or slaked lime. The sulfur oxides and the nitric oxides are removed in the same reactor at the same temperature, the process is simple, and the operating cost is relatively low; and meanwhile, the method has the advantages that the reaction temperature range is wide, the catalyst is not influenced by the erosive wear of smoke dust and the pollution of impurities in fly ash, and the like.

Description

technical field [0001] The invention belongs to the field of flue gas purification, in particular to a catalyst for simultaneously removing sulfur oxides and nitrogen oxides in flue gas. Background technique [0002] Sulfur oxides (also known as SOx) and nitrogen oxides (also known as NOx) are the main pollutants in the air and are the main substances that form acid rain. Most of the existing methods for removing sulfur oxides and nitrogen oxides are carried out step by step, either removing sulfur oxides or nitrogen oxides first. In the removal of flue gas sulfur oxides, it can be divided into two categories: wet method and dry method. The wet method mainly uses acid-base neutralization reaction. The wet method accounts for more than 80% of the world market. Among them, the calcium method is the main method. The advantages of calcium desulfurization are high desulfurization efficiency and high utilization rate of desulfurizer, but there are also problems such as easy scal...

AI Technical Summary

Problems solved by technology

[0006] In the above-mentioned many patent methods, although the sulfur oxides and nitrogen oxides in the flue gas can be effectively removed simultaneously, there are some deficiencies: 1) It is necessary to inject reducing substances such as ammonia, refinery dry gas, and natural gas; 2) The adsorption-regeneration of the adsorbent needs to be carried out at different temperatures, and the energy consumption is high; 3) Subsequent processes are required to deal with sulfide; 4) The process is relatively complicated

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