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Title:
APPARATUS AND METHOD FOR EX-SITU CHEMICAL ELUTION REMEDIATION OF HEAVY METAL CONTAMINATED SOIL AND RECYCLE OF ELUATE
Document Type and Number:
WIPO Patent Application WO/2018/006708
Kind Code:
A1
Abstract:
Disclosed is an apparatus for the ex-situ chemical elution remediation of heavy metal contaminated soil and the recycle of an eluate. The apparatus comprises a dry drum-type screening device (3), a grinder (4), a wet drum-type screening device (5), a primary elution reaction tank (6), a secondary elution reaction tank (8) and an eluate recycling device, wherein the eluate recycling device comprises an eluate collecting tank (10), a regulating and neutralizing tank (11), an electric flocculation device (12), an aeration oxidation tank (13), a diatomite circulating clarification tank (14), a pH value back-regulating tank (15) and an eluate recycling tank (16) connected sequentially. Further disclosed is a method for the ex-situ chemical elution remediation of heavy metal contaminated soil and the recycle of an eluate. The method performs ex-situ chemical elution remediation and eluate recycling using the apparatus, and is applicable to places of higher contamination concentrations and larger risks. A direct and effective technical method can be selected for the centralized treatment of contaminated soil, with the treatment being high in efficiency and complete. Moreover, the eluate is recycled, and energy is saved, without any secondary contamination.

Inventors:
YOU, Jianjun (Room 2030, Building No.5 Xiangshuyuan, No.8th Lutian Road, High Technology Distric, Changsha Hunan 5, 410205, CN)
ZHONG, Rubo (Room 2030, Building No.5 Xiangshuyuan, No.8th Lutian Road, High Technology Distric, Changsha Hunan 5, 410205, CN)
HU, Zhixin (Room 2030, Building No.5 Xiangshuyuan, No.8th Lutian Road, High Technology Distric, Changsha Hunan 5, 410205, CN)
TANG, Chuanxiang (Room 2030, Building No.5 Xiangshuyuan, No.8th Lutian Road, High Technology Distric, Changsha Hunan 5, 410205, CN)
Application Number:
CN2017/089284
Publication Date:
January 11, 2018
Filing Date:
June 21, 2017
Export Citation:
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Assignee:
HUNAN AIRBLUER ENVIRONMENTAL PROTECTION TECHNOLOGY CO., LTD (Room 2030, Building No.5 Xiangshuyuan, No.8th Lutian Road, High Technology Distric, Changsha Hunan 5, 410205, CN)
International Classes:
B09C1/02; B09C1/08; C02F9/06
Attorney, Agent or Firm:
CHINABLE IP (620 Room, 35-10-2 the 6th Floor,No.35 Anding Road, Chaoyang District, Beijing 9, 100029, CN)
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