Title:
CHEMICAL LEACHING AND SEPARATING METHOD FOR CONTAMINANTS IN SOIL OR SOLID WASTE AND SEPARATION SYSTEM THEREOF
Document Type and Number:
WIPO Patent Application WO/2019/037562
Kind Code:
A1
Abstract:
Disclosed is a chemical leaching and separating method for contaminants in soil and solid waste and separation system thereof. The separating method comprises: in a chemical leaching step, first reacting a high-concentration leacheate with the contaminants in the soil or the solid waste, so that the contaminants in the soil or the solid waste dissolve into the leacheate as solutes; and then, in a countercurrent washing step, partially displacing the contaminants as the solutes in the mixed solution obtained after leaching the soil or the solid waste by a washing liquid till the mixed solution obtained after leaching the soil or the solid waste has a contaminant concentration equal to the targeted concentration of the treatment, and may be discharged and satisfy the treatment requirement. A regeneration cycle step is dynamically carried out during the steps of the chemical leaching and the countercurrent washing, so that the volume of the leacheate and the concentration of the contaminants in the leacheate are constant in the whole treatment process of the contaminants in the soil or the solid waste to achieve a stable circulation. The separation system can implement the leaching and separating method.
Inventors:
ZHANG CHEN (CN)
Application Number:
PCT/CN2018/096200
Publication Date:
February 28, 2019
Filing Date:
July 19, 2018
Export Citation:
Assignee:
ZHANG CHEN (CN)
International Classes:
B09C1/02; C02F9/04; C02F9/06
Foreign References:
| CN107309263A | 2017-11-03 | |||
| CN207271800U | 2018-04-27 | |||
| CN101708501A | 2010-05-19 | |||
| CN105032921A | 2015-11-11 | |||
| CN106268738A | 2017-01-04 | |||
| CN105772497A | 2016-07-20 | |||
| US5607060A | 1997-03-04 | |||
| EP0278328A1 | 1988-08-17 |
Attorney, Agent or Firm:
CHINABLE IP (CN)
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