Smoke purification technology implemented based on adsorbent pretreatment

Abstract

The invention discloses a smoke purification technology implemented based on adsorbent pretreatment. According to the smoke purification technology, raw smoke in a main flue is conveyed into a SO2 absorption system through a smoke system; the smoke system mainly comprises an auxiliary flue and the main flue which are communicated with each other; an impact pulverizing grading machine is arranged in the auxiliary flue; the raw smoke comprises auxiliary smoke passing through the auxiliary flue and flue gas passing through the main flue; an absorbent is conveyed into the impact pulverizing grading machine along with the auxiliary smoke, and an obtained gas-powder mixture enters the main flue and is subjected to mixing reaction with the flue gas; the obtained mixture is conveyed to the SO2 absorption system. The smoke purification technology is designed specially for rough purification of the flue gas, so that the desulfuration and denitration efficiency of the absorbent is greatly improved; the smoke purification technology has an extremely effect for promoting the treatment efficiency of a subsequent desulfuration and denitration technology.

Description

technical field [0001] The invention is a flue gas purification process realized based on absorbent pretreatment, specifically relates to the technical treatment of absorbent in the process of using a desulfurization and denitrification process to realize flue gas purification, and belongs 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 fuel combustion is the main substance th...

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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