发生炉煤气洗涤废水封闭循环后污染物增长的平衡规律研究

Study on the Balance of increasing Pollutants after Closed-hoped Circulation of Wastewater of Coal Gas

大量的实验及环境监测数据表明，烟煤煤气站发生护煤气洗涤废水长期完全封闭循环运行后，废水中以挥发酚为主的污染物浓度不会无限增长，存在着动态平衡．在平衡范围内，挥发酚浓度为１３００—２０００ｍｇ／Ｌ，氰化物为４—２０ｍｇ／Ｌ，硫化物为３５—７０ｍｇ／Ｌ．研究结果表明。

large amount of experiments and monitering data showed that after circulation of coal gas washwater, the concentration of pollutants (mainly valatile phenol) does not increase unlimitedly, but reaches a dynamic equilibrium. The concentration of phenol is 1300-2000 mg/L, cyanide is 4- 20 mg/L,sulfide is 35- 70 mg/L at the range of equilibrium.The result showed that it is completely feasible to use the routine technological treatment of closed-looped circulation of pretreatment of coal gas washwater removing suspended solids and tar.