VERFAHREN ZUR BEHANDLUNG VON BEI DER KOHLEPYROLYSE ANFALLENDEM ABWASSER

摘要

In a process for treating coal pyrolysis effluent, the effluent is filtered (6, 10), distilled (13) and separated by reverse osmosis (20, 21, 22) into a permeate of low salt concentration which can be recycled to the coking process and a concentrated salt solution. The concentrated salt solution (32) is split either wholly or in part, in a hot reducing atmosphere (41), and the salts separated. According to the invention, the concentrated salt solution is placed, either wholly or in part, in contact with the hot chamber coke in a closed, gasifying, coke cooling stage (50) in order to decompose the noxious substances in said salt solution and to utilize the oxygen fraction by the formation of oxygen and carbon monoxide.