SCR (Selective Catalytic Reduction) denitrification device for flue gas of glass kiln

Abstract

The invention discloses an SCR (Selective Catalytic Reduction) denitrification device for flue gas of a glass kiln. The SCR denitrification device comprises waste heat boilers and a denitrification reactor, a gas inlet end of the ammonia process SCR denitrification reactor is communicated with the first waste heat boiler to receive flue gas which is cooled to 320-420 DEG C through heat exchange, and a gas outlet end of the SCR denitrification reactor is communicated with the second waste heat boiler and discharges the denitrified flue gas into a chimney after the denitrified flue gas is cooled to 150-170 DEG C through heat exchange; and the denitrification reactor comprises an ammonia injection grid, an ammonia-flue gas mixer, a rectifier, and a multilayer catalyst bed and a soot blowers thereof, which are arranged in a flue gas channel in sequence. The SCR denitrification device is wide in application range, does not influence the power generation of the waste heat boilers, and realizes the waste heat utilization and denitrification; regulating valves are arranged in all links of the whole system so as to ensure the denitrification effect and save the ammonia usage amount; and the sooth blowers of the reactor adopts steam blowing, the pressure is precisely controlled, the steam of the waste heat boilers arranged in a matching can be fully utilized; and an openable door arranged at a position where the denitrification system is connected with the waste heat boilers can ensure that the waste heat boilers can independently or simultaneously operate.

Description

technical field [0001] The invention belongs to the technical field of environmental pollution treatment and air pollution control, in particular to a device for denitrification of flue gas through selective catalytic reduction (SCR), in particular to a device for denitrification of flue gas in a glass factory. Background technique [0002] Nitrogen oxides are one of the main pollutants in the atmosphere, causing acid rain and photochemical smog. As my country's environmental protection laws, regulations and standards become increasingly strict, Selective Catalytic Reduction (SCR) technology with mature technology, high denitrification rate and no secondary pollution will gradually become the mainstream technology in my country's flue gas denitrification market. Glass kilns in glass factories are a pollution source of NOx emissions. With the strengthening of public environmental protection requirements and awareness, relevant departments in my country issued the "Emission St...

AI Technical Summary

Problems solved by technology

If the reaction temperature is low, the activity of the catalyst will decrease, resulting in a decrease in denitrification efficiency, and if the catalyst continues to operate at low temperature, the catalyst will be permanently damaged; if the reaction temperature is too high, NH 3 It is easy to be oxidized, the amount of NOx produced increases, and it also causes the phase change of the catalyst material, deteriorating the activity of the catalyst

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