METHOD FOR RECYCLING RESIDUAL HEAT AND DUST IN FLUE GAS DURING RECLAIMED COPPER REFINING

摘要

A method for recycling residual heat and dust in flue gas during reclaimed copper refining, relating to a method for residual heat utilization and exhaust gas treatment, the method comprising a residual heat recycling apparatus and a dust recycling apparatus; the residual heat recycling apparatus consists of a counterflow heat-exchange residual heat boiler A (1), a counterflow heat-exchange residual heat boiler B (2), and a working medium preheater (3) of a counterflow heat-exchange residual heat boiler; the dust recycling apparatus consists of a water-spray scrubbing tower (4), a liquid membrane scrubber (5), an entrainment trapper (6), a draught fan (7), a settling filter A (8), and a settling filter B (9); the recycling method comprises the following steps: first-level residual heat recycling, second-level residual heat recycling, third-level residual heat recycling, dust recycling via water spraying, dust recycling via a liquid membrane, entrainment removal, and standard emission of exhaust gas. The method recycles residual heat thoroughly with high efficiency and low cost.