等离子体炉尾气处理系统的研制

等离子体炉裂解有机砷化物后的尾气经二次炉有氧燃烧,排出的高温废气主要污染物为三氧化二砷、二氧化硫、氮氧化物、氯化氢及粉尘等。研制的尾气处理系统需将高温气体冷却、洗涤净化,分离含砷废渣并返回等离子炉内熔融玻璃体固化处置。通过研制和实验,该系统实现了负压运行、有效急冷尾气、控制污染物,玻璃体浸出液砷的浓度小于0.03 mg·L-1,经处理后的废物均可达标排放。

Research on exhaust gas treatment system of plasma furnace

Pyrolyzed organic arsenic compounds from a plasma furnace were second combusted in an oxygen environment.The exhaust gases mainly contained As2O3,SO2,NOx,HCl,and dust.A high-temperature exhaust-gas treatment system was developed that included the processes of cooling the high-temperature exhaust gas,washing and purifying,separating arsenic waste,and returning to the plasma furnace molten glass solidifying.The development and testing of the system achieved a negative pressure running,effectively quenching and controlling the exhaust.The concentration of vitreous leachate arsenic was less than 0.03 mg·L-1.The treated waste met the standards for discharge.