发明名称 |
MOBILE SOIL TREATMENT APPARATUS AND METHOD |
摘要 |
A mobile apparatus and method for treating contaminated soil is disclosed. The apparatus consists of three interconnected subunits, namely a fluidized bed reactor for segregating an aqueous soil slurry based on particle size; a metals extraction unit for removing heavy metals and other contaminants from the contaminated soil fraction; and a water treatment system utilizing a high density sludge process to remove metals from the contaminated aqueous phase. The fluidized bed reactor includes a relatively small mixing chamber and a relatively large settling chamber which are partially separated by a baffle. Pressurized gas and foaming agent are dispersed into the mixing chamber to segregate the soil particles into a first fraction containing relatively small, contaminated soil particles and a second fraction containing relatively large, uncontaminated soil particles. The first fraction is continuously withdrawn from an upper portion of the reactor as a foam and a soil slurry containing the relatively uncontaminated second fraction is continuously withdrawn from a lower portion of the reactor. The soil slurry is dewatered by means of a hydrocyclone and a solids trap. Water, foaming agent and any suspended fines are recycled to the reactor vessel. |
申请公布号 |
EP0961662(A1) |
申请公布日期 |
1999.12.08 |
申请号 |
EP19960929987 |
申请日期 |
1996.09.13 |
申请人 |
CHEMTECH ANALYSIS INC. |
发明人 |
STEPHENSON, ROBERT, JOHN;LIM, CHOOM, JIM;LIM, KOK-SENG |
分类号 |
B03B5/62;B03B9/00;B03D1/14;B09C1/02;(IPC1-7):B09C1/02;B09C1/04 |
主分类号 |
B03B5/62 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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