公开(公告)号：US4620492A

公开(公告)日：1986-11-04

申请号：US759128

申请日：1985-07-23

申请人： Hubert Vogg ,  Hartmut Braun ,  Gabriele Jindra

发明人： Hubert Vogg ,  Hartmut Braun ,  Gabriele Jindra

IPC分类号： B01D53/64 ,  B01D53/70 ,  F23J11/00 ,  F23J15/00

CPC分类号： B01D53/64 ,  B01D53/70

摘要： A process for the purification of flue gas generated during the combustion of waste materials has a first embodiment wherein soluble heavy metals are precipitated and recovered in a compact form and wherein the soluble heavy metal-free extraction residue is returned to the combustion system where noxious organic substances are pyrolyzed. In another embodiment, substantially all of the heavy metals from the flue gas are collected in a single solid residue, which residue may be thermally treated to recover mercury and the treated residues subsequently returned to the combustion system wherein noxious organic substances are pyrolyzed or combined in a hazardous waste stabilizing substance. In yet another embodiment of the process, heavy metals present in an acidic condensate solution from a condensation/scrubbing step are precipitated and the precipitated heavy metals are thermally treated, together with the flue ash, to remove mercury, after which the remaining solids may be returned to the combustion system to pyrolyze noxious organic substances contained therein or may be combined with a hazardous waste stabilization substance.

摘要翻译： 用于净化在废物燃烧期间产生的烟道气的方法具有第一实施方案，其中可溶性重金属以致密形式沉淀和回收，并且其中可溶性无重金属萃取残余物返回到燃烧系统，其中有害有机物 物质被热解。 在另一个实施方案中，来自烟道气的基本上所有的重金属都被收集在单个固体残余物中，该残余物可被热处理以回收汞，并且经处理的残余物随后返回到燃烧系统，其中有害有机物质被热解或组合 危险废物稳定物质。 在该方法的另一个实施方案中，存在于缩合/洗涤步骤的酸性冷凝物溶液中的重金属被沉淀，沉淀的重金属与烟灰一起被热处理以除去汞，之后剩余的固体可以是 返回到燃烧系统以热解其中含有的有害有机物质，或者可以与危险废物稳定物质组合。