Abstract: A 4 500t/d cement clinker production line faced issues such as low preheater heat exchange efficiency, high negative pressure and temperature at the outlet of the C1 cyclone, small decomposition furnace volume, insufficient cooling capacity of the grate cooler, and high standard coal consumption for clinker pyro system. By implementing measures including upgrading the five-stage preheater to a six-stage one, expanding the decomposition furnace, reducing resistance in each cyclone, replacing the reciprocating push-type grate cooler with a stepped high-efficiency grate cooler, and replacing the kiln head burner, the system's operational stability was significantly improved. After transformation, the system's standard coal consumption decreased by 14.23kg/t.cl, the outlet temperature of the C1 cyclone dropped from 305℃ to 295℃, the outlet negative pressure decreased by 200Pa, the electricity consumption of the pyro process decreased by 5.99kW·h/t.cl, and the 3d and 28d compressive strength of the clinker increased by 6.1MPa and 5.5MPa respectively. Annually, it can save 27.1696 million CNY and reduce CO2 emissions by approximately 54 421t, demonstrating good economic and social benefits.
