Flue gas injection conveying technology for achieving absorbent pretreatment in flue gas purification method

Abstract

The invention discloses a flue gas injection conveying technology for achieving absorbent pretreatment in a flue gas purification method. Raw flue gas is conveyed to a flue gas desulfurization system along a flue collector. The raw flue gas comprises auxiliary flue gas and stack gas; an absorbent is fed into an impact grinding classifier along with the auxiliary flue gas; and after an obtained gas-powder mixture enters the flue collector to be mixed and react with the stack gas, the gas-powder mixture and the stack gas are conveyed to the flue gas desulfurization system together. The technology is specially designed for a rough purification technology of the stack gas; the absorbent is introduced into the impact grinding classifier by the auxiliary flue gas; the absorbent is used for desulfuration and denitration of the auxiliary flue gas while the absorbent is pretreated and the gas-powder mixture is obtained; the absorbent in the gas-powder mixture has activity due to the reaction, and is mixed and reacts with the stack gas after conveyed into the flue collector; the desulfuration and denitration efficiency of the absorbent is greatly improved; and the technology has a very high promotion effect on improving the treatment efficiency of a subsequent desulfuration and denitration technology.

Description

technical field [0001] The present invention relates to a flue gas jet conveying process for realizing absorbent pretreatment in a flue gas purification method, and specifically relates to a flue gas jetting process to the main flue realized after the absorbent is pretreated in a flue gas rough purification method , belonging to the field of flue gas purification. Background technique [0002] The continuous progress of petroleum and chemical industries has not only promoted economic development, but also caused pollution to the environment. At present, the global pollution problem has become increasingly serious, and has attracted widespread attention and attention from all over the world, especially coal-fired power plants. , coal-fired boilers, and waste incineration flue gas emissions, etc., have seriously polluted the atmosphere. We know that coal-fired flue gas contains a large amount of soot, carbon dioxide, SO 2 and NO X Among them, the carbon dioxide emitted by fu...

AI Technical Summary

Problems solved by technology

[0004] At present, the flue gas desulfurization and denitrification technology widely used in the world is to use the above-mentioned traditional flue gas desulfurization technology combined with SCR denitrification technology to achieve the purpose of desulfurization and denitrification. Although this technology can remove more than 90% of SO 2 and more than 80% NOx, but this method is actually still a combination of separate desulfurization and denitrification technologies, and has the disadvantages of the above-mentioned desulfurization and denitrification technologies, and cannot get rid of the long process flow, large investment, and high operating costs. , poor technical economy, easy to cause secondary pollution and other problems

From the existing patent documents CN102489129A (industrial flue gas purification, desulfurization and denitrification integrated device and its working method, 2012.06.13), CN203108424U (a flue gas treatment device for simultaneous desulfurization and denitrification, 2013.08.07), we know that combined desulfurization Denitrification technology has gradually become the development direction of flue gas treatment, but this kind of integrated flue gas desulfurization and denitrification technology is often not mature enough. SO in Dao gas 2 or NO X For rough purification, the methods used include ozone injection, cooling, absorbents, etc., and patent documents CN102363095A (flue gas dry desulfurization process and flue gas dry desulfurization system, 2012.02.29), CN103990375A (a semi Dry sintering flue gas integrated purification method, 2014.08.20), etc., in the actual use process, its treatment efficiency is not obvious from the whole desulfurization (denitrification) process, so their industrial application is not obvious. not obvious

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