Integrative coordinated desulfurization, denitration, demercuration device and technique using spray bubbling method

Abstract

The invention relates to an integrated synergistic desulphurization, denitrification and demercuration device used for flue gas and a process for carrying out integrated synergistic desulphurization, denitrification and demercuration of the flue gas by using the device. The device comprises an original flue gas chamber (11), a tower body (6), a flue gas partition plate (8) and a bubbling jet pipe 5; wherein, the original flue gas chamber is fixed above the flue gas partition plate; the flue gas partition plate is fixed above the tower body; the three parts of the original flue gas chamber, the flue gas partition plate and the tower body are connected by an upper flange (12) and a lower flange (14); the upper end part of the bubbling jet pipe (5) is connected with the flue gas partition plate; the jet pipe communicates with the original flue gas chamber; an original flue gas inlet channel (10) is arranged outside the original flue gas chamber; and a purified flue gas outlet channel (15), a slurry discharge pipe (16), an oxidation wind pipe (1), a slurry return pipe (3) and a slurry adding pipe (4) are arranged outside the tower body.

Description

technical field [0001] The invention relates to a device and process for purifying coal-fired flue gas, especially for the integrated and coordinated removal of SO in coal-fired flue gas by jet bubbling method 2 , NO and elemental zero-valent mercury Hg 0 devices and processes. Background technique [0002] At present, the emission control of coal-fired flue gas pollutants has been paid attention to by countries all over the world, among which SO 2 , NOx has industrialized equipment to remove it, and the removal control of heavy metal Hg is still under study. Conventional limestone-gypsum wet flue gas desulfurization technology uses limestone as absorbent to remove SO from flue gas 2 gas, while for NOx and elemental mercury Hg in flue gas 0 powerless. The main component of NOx is NO, which accounts for more than 90% of NOx. The removal methods include reduction and oxidation. The reduction method is to use a reducing agent to reduce it to N 2 , the oxidation method is...

AI Technical Summary

Problems solved by technology

However, if the above method is adopted to achieve simultaneous desulfurization and denitrification of coal-fired flue gas, the investment and operating costs of the two sets of flue gas purification devices will inevitably be high

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