Automatic control SCR flue gas denitrification urea pyrolysis system
A flue gas heating and urea technology, which is applied in the field of energy saving and emission reduction in power plants, can solve the problems of high energy consumption and high operating costs of the urea pyrolysis system, and achieve the effects of reducing evaporation in the tower, increasing residence time, and saving water consumption
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[0022] See figure 1 The structure of the automatic control SCR flue gas denitration urea pyrolysis system in this embodiment is:
[0023] An air-to-air heat exchanger 13 is arranged in the inlet flue of the electrostatic precipitator 16 to form an air heating unit, and a set of flue gas heating tube bundles 2 are arranged in the boiler 1 to form an air reheating unit. The air is introduced into the air-to-air heat exchange through the induced air pump 10 The heat source temperature required for urea pyrolysis becomes high-temperature air after being reheated by the flue gas heating tube bundle 2 in the gas-to-air heat exchanger 13, and the high-temperature air is fed into the urea pyrolysis furnace 5 and sprayed The atomized urea solution is mixed and pyrolyzed to produce ammonia / air mixed gas. The ammonia / air mixed gas is sprayed into the inlet flue of the SCR denitrification reactor 11 through the booster pump 8 and then through the AIG ammonia injection grill 9.
[0024] Such a...
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