公开(公告)号：US5361514A

公开(公告)日：1994-11-08

申请号：US62513

申请日：1993-05-14

申请人： Edward J. Lahoda ,  John A. Paffenbarger ,  C. Keith Paulson ,  Jerry C. Seagle ,  Donald W. Cash

发明人： Edward J. Lahoda ,  John A. Paffenbarger ,  C. Keith Paulson ,  Jerry C. Seagle ,  Donald W. Cash

IPC分类号： A62D3/00 ,  B01D43/00 ,  B01D57/00 ,  B09C1/00 ,  B09C1/06 ,  F26B3/02 ,  F26B25/00 ,  F26B7/00

CPC分类号： F26B25/006 ,  B09B3/0091 ,  B09C1/06

摘要： The removal of organics and volatile metals from soils using thermal desorption comprises moving contaminated materials, positioned on a belt conveyor, through a chamber (32) under oxygen conditions, temperature conditions, and residence time effective to substantially avoid incineration of the contaminants, while volatilizing the contaminants and producing a processed material that is substantially decontaminated, where the volatilized contaminants are carried from the chamber (32) by a transport gas which is passed through a packed tower (70) where quench/scrubbing liquid flows countercurrent to gas flow, for producing a substantially cleaned gas and a contaminated liquid concentrate. The gas may be passed through a further gas cleaning system (86) prior to discharge into the atmosphere, while the liquid concentrate is passed through a water treatment system (90) for producing substantially cleaned water which may be passed through an air cooler (92) and recycled back to cool the processed material. Steam from moist contaminated material can be used as a cocurrent transfer gas.

摘要翻译： 使用热解吸从土壤中除去有机物和挥发性金属包括在氧气条件，温度条件和停留时间内将定位在带式输送机上的污染物质移动通过室（32），以有效地基本上避免污染物的焚化，同时挥发 污染物并产生基本上被净化的加工材料，其中挥发的污染物通过输送气体从室（32）运送，该输送气体通过填充塔（70），其中骤冷/洗涤液体与气流逆流流动，用于 产生基本清洁的气体和污染的液体浓缩物。 气体可以在排放到大气中之前通过另外的气体清洁系统（86），同时液体浓缩物通过水处理系统（90），用于产生可以通过空气冷却器（92）的基本上清洁的水 ）并回收再冷却加工的材料。 来自潮湿污染物质的蒸汽可以用作并流传输气体。