A flue gas denitrification device

Abstract

The invention provides a flue gas denitrification device which comprises a hot blast furnace, a flue gas mixer connected with the hot blast furnace, a selective non-catalytic reduction (SNCR) reaction furnace connected with the flue gas mixer, and a flue gas-flue gas heat exchange device connected with the flue gas mixer and the SNCR reaction furnace. Flue gas after being heated by the flue gas-flue gas heat exchange device is mixed with high-temperature flue gas generated by the hot blast furnace in the flue gas mixer, and the flue gas after being mixed enters the SNCR reaction furnace for denitrification. Adopting of a catalyst is not needed, so that the problem that the catalyst is poisoned and loses efficacy due to the fact that flue gas of a glass kiln is large in dust content and high in cohesiveness is avoided; denitrification efficiency is improved, the flue gas denitrification device is low in running cost, power generation capacity of an original waste heat power generation system cannot be affected, environment-friendly requirements of denitrification are met, and the flue gas denitrification device has huge economic benefit.

Description

technical field [0001] The invention relates to a glass kiln flue gas purification system, in particular to a flue gas denitrification device. Background technique [0002] The current rapid increase in NOx emissions and atmospheric NOx concentration has led to a series of urban and regional environmental problems, posing a huge threat to human health and the ecological environment. [0003] Glass kiln flue gas contains 3000-7000ppm of nitrogen oxides, and its emission is an important emission source after thermal power plants. [0004] At present, the selective catalytic reduction method (SCR method) and the selective non-catalytic reduction method (SNCR method) are widely used in domestic and foreign flue gas denitrification technologies. The selective catalytic reduction method is to inject a reducing agent such as ammonia (NH3) into the flue and mix it with the flue gas. Under catalytic conditions, NH3 can reduce NOx to nitrogen at a lower temperature (250-450 ° C), the...

AI Technical Summary

Problems solved by technology

The SCR denitrification of glass kiln flue gas has the following problems: the dust content in glass kiln flue gas is large, and the cohesiveness is strong, which easily leads to catalyst poisoning and failure, which seriously reduces the denitrification efficiency; the operating cost of SCR denitrification is high; the glass kiln flue gas passes through The temperature drop after the SCR denitrification system affects the utilization rate of waste heat and power generation

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