Glass furnace flue gas desulfurization and denitrification system and process

Abstract

The invention discloses a glass furnace flue gas desulfurization and denitrification system and process. The system comprises a glass furnace burner regenerative chamber primary denitrification unit, a flue gas dust removal device, a decomposition-process ammonia production device and a flue gas desulfurization and secondary denitrification unit. Primary denitrification of flue gas is completed in a glass furnace burner regenerative chamber by using ammonia as a denitrification agent, secondary denitrification can be realized during subsequent ammonia desulfurization, ammonia and ammonium hydrogen sulfate are produced by using a desulfurization product ammonium sulfate, the ammonia can be used as a primary denitrification absorbent, hydrogen peroxide is further produced by using the ammonium hydrogen sulfate and is used as an oxidant of NOx in the flue gas, residual liquid can be cyclically utilized, thereby the ammonia does not need to be externally supplied during the primary denitrification in the invention, and the secondary removal of the remaining NOx in the flue gas is realized in the subsequent ammonia desulfurization process. The glass furnace flue gas desulfurization and denitrification system and process disclosed by the invention are simple and the desulfurization and denitrification efficiency are high.

Description

technical field [0001] The invention relates to a glass kiln flue gas desulfurization and denitrification system and process. Background technique [0002] The main pollutants in glass furnace flue gas are SOx, NOx and dust, among which SOx is mainly SO 2 , NOx pollutants are mainly NO and NO 2 , the dust particles in the flue gas are fine and sticky. Since the glass industry started late in the control of flue gas emissions, some flue gas from glass furnaces is even discharged directly into the atmosphere without treatment, causing increasingly serious pollution to the atmosphere. With the improvement of environmental protection requirements, the glass industry is urged to carry out comprehensive treatment of desulfurization, denitrification and dust removal of glass furnace flue gas. [0003] At present, flue gas denitrification technology uses denitrification reducing agent to react with NOx in flue gas for denitrification. When ammonia water is used as the denitrific...

AI Technical Summary

Problems solved by technology

Therefore, the present invention does not need external ammonia supply for the primary denitrification process, and the remaining NOx in the flue gas is removed twice in the subsequent ammonia desulfurization process, which solves the problem that the ammonia source needs to be supplied externally in the denitrification method using ammonia as the denitrification agent in the prior art. Large ammonia consumption and poor denitrification effect in the process of ammonia desulfurization

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