During the operation of the boiler, the corrosion of the low-temperature flue gas formed by the heat exchange of the high-temperature flue gas and the erosion of a large amount of dust in the flowing flue gas also accelerate the corrosion rate. The corrosion problem of the boiler heat exchange surface has brought greater safety hazards and inevitable economic losses to the users.
As the coke contains elements such as S, Cl, F, SO2, HCl, HF and other corrosive media will be generated in the flue gas during the dry quenching process. These corrosive media will cause various corrosion to the heat exchange tube wall. , Affecting the safe production and operation of waste heat boilers.
Dry coke quenching is a coke quenching method that uses inert gas to cool the red coke in an oxygen-free environment. During the CDQ process, red coke is loaded from the top of the CDQ, low-temperature inert gas is blown into the red coke layer of the cooling section of the CDQ by a circulating fan, and the cooled coke is discharged from the bottom of the CDQ; the red coke is absorbed After latent heat, the inert circulating gas whose temperature rises is discharged from the annular flue of the CDQ and enters the CDQ waste heat boiler for heat exchange. The steam produced by the boiler enters the steam turbine to drive the generator to generate electricity. The low temperature after cooling from the CDQ waste heat boiler The inert gas enters the circulating fan and blows into the dry quenching furnace again.
