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Soil washing device and washing method thereof

A cleaning device and soil technology, applied in the restoration of polluted soil, etc., can solve the problems of unfavorable polluted soil reduction and resource utilization, weakened soil particle size classification, etc.

Inactive Publication Date: 2016-05-25
BEIJING GEOENVIRON ENG & TECH
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  • Abstract
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Problems solved by technology

[0004] Traditional soil cleaning devices weaken the concept of soil particle size classification, which is not conducive to the reduction and resource utilization of polluted soil

Method used

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  • Soil washing device and washing method thereof
  • Soil washing device and washing method thereof

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Embodiment Construction

[0025] In order to facilitate a further understanding of the structure, method and achieved effects of the present invention, preferred embodiments are described in detail below in conjunction with the accompanying drawings.

[0026] Such as figure 1 As shown, the soil cleaning device of the present invention includes a particle classification unit, a soil cleaning unit and a sewage treatment unit. The particle classification unit is used to separate the soil into particles with different particle sizes. The separated soil particles are cleaned, and the sewage treatment unit performs solid-liquid separation on the cleaned soil, the separated filter cake is improved and then backfilled, and the separated sewage is subjected to advanced treatment.

[0027] Wherein the particle classification unit comprises a linear vibrating screen 10, a feed hopper 11, a trommel 12, a fine material collecting tank 13 and a coarse material collecting tank 14, the feeding hopper 11 is arranged un...

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Abstract

The invention discloses a soil washing device and a washing method thereof. The washing device comprises a particle grading unit, a soil washing unit and a sewage treatment unit, wherein the particle grading unit is used for separating soil into particles with different particle sizes, the soil washing unit is used for washing the separated soil particles by adding an agent and clean water, and the sewage treatment unit is used for performing solid liquid separation on washed soil, a separated filter cake is improved, then backfilling is performed, and deep treatment is performed on separated sewage. Particle size grading is performed on polluted soil for multiple times, then soil with a particle size range in which target pollutants exist intensively and a leaching agent are mixed and added into a leaching reactor, multi-stage washing is performed by controlling certain conditions, the washed soil is separated out, then backfilling or deep treatment is performed, and liquid waste gathering the pollutants is treated and then is discharged or reused.

Description

technical field [0001] The invention relates to a cleaning device and method in the field of environmental protection, in particular to a cleaning device and a cleaning method for polluted soil in the soil remediation industry. Background technique [0002] With the rapid development of industry and the adjustment of the national policy of "retreating from the second to the third", a large number of polluted sites in China need to be repaired and treated urgently. Soil pollutants on the site come from a wide range of sources, including the discharge of industrial pollutants such as chemical industry, metallurgy, mining, and pharmaceuticals. Compared with air and water pollution, soil pollution has the characteristics of long-term and hidden nature, which endangers human health and the ecological environment. Therefore, repairing polluted soil and restoring soil use functions have always been hot and difficult issues both at home and abroad. [0003] The technologies curren...

Claims

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Application Information

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IPC IPC(8): B09C1/02
CPCB09C1/02
Inventor 吕正勇魏丽刘中良范吉强李淑彩高飞佟立永张培甄胜利
Owner BEIJING GEOENVIRON ENG & TECH
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