Behandling af procesgasser indeholdende halogenerede forbindelser

摘要

PCT No. PCT/FI90/00134 Sec. 371 Date Nov. 22, 1991 Sec. 102(e) Date Nov. 22, 1991 PCT Filed May 16, 1990 PCT Pub. No. WO90/14559 PCT Pub. Date Nov. 29, 1990.The present invention relates to a method of treating various chlorine-containing materials such as wastes, biological sludges and even metal concentrates in a circulating fluidized bed reactor (1) or a grate furnace at a high temperature of over 830 DEG C. and of cooling the resultant process gases for minimizing the amount of polyhalogenated aromatic compounds in the process gases. The process gases are cooled to a temperature below 250 DEG C. at a cooling velocity exceeding 1000 DEG C. per second. Cooling is preferably effected in a circulating fluidized bed reactor (2).