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Repairing device and repairing method for heavy metal polluted soil

A technology of polluted soil and remediation method, which is applied in the field of remediation devices for heavy metal-contaminated soil, which can solve the problems of complex structure of remediation devices, high labor intensity, secondary pollution, etc., and achieve good anti-membrane pollution ability, low labor intensity and low water consumption little effect

Pending Publication Date: 2020-03-06
南京华创环境技术研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defects of high cost, low efficiency, high labor intensity, complex structure of the repairing device, and easy to produce secondary pollution of the soil restoration in the prior art, thereby providing a heavy metal contaminated soil Repair device and repair method

Method used

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  • Repairing device and repairing method for heavy metal polluted soil
  • Repairing device and repairing method for heavy metal polluted soil
  • Repairing device and repairing method for heavy metal polluted soil

Examples

Experimental program
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Effect test

Embodiment 1

[0066] This embodiment provides a repairing device and repairing method for heavy metal-contaminated soil, the repairing device such as figure 1 shown, including,

[0067] The rinsing system 1 is used for rinsing heavy metal contaminated soil to obtain a solution rich in heavy metal ions; figure 2 As shown, it includes a liquid storage tank 11 rich in heavy metal ion solution, a spray device 12, a soil storage tank 13, a spiral conveyor belt 14 and a shower system housing 15; the spray device 12 includes a spray tank 121, a shower head 122 and The dosing device 123, the eluent is stored in the spray tank 121, the spray device 12 is arranged on the top of the elutriation system 1, the liquid storage tank is arranged at the bottom of the elutriation system, and the spiral conveyor belt 14 transports the heavy metal contaminated soil from bottom to bottom. The eluent is conveyed on the top, and the eluent passes through the nozzle 122 and then passes through the spiral conveyor...

Embodiment 2

[0075] This embodiment provides a repairing device and repairing method for heavy metal-contaminated soil, the repairing device such as figure 1 shown, including,

[0076] The rinsing system 1 is used for rinsing heavy metal contaminated soil to obtain a solution rich in heavy metal ions; figure 2 As shown, it includes a liquid storage tank 11 rich in heavy metal ion solution, a spray device 12, a soil storage tank 13, a spiral conveyor belt 14 and a shower system housing 15; the spray device 12 includes a spray tank 121, a shower head 122 and The dosing device 123, the eluent is stored in the spray tank 121, the spray device 12 is arranged on the top of the elutriation system 1, the liquid storage tank is arranged at the bottom of the elutriation system, and the spiral conveyor belt 14 transports the heavy metal contaminated soil from bottom to bottom. The eluent is conveyed on the top, and the eluent passes through the nozzle 122 and then passes through the spiral conveyor...

Embodiment 3

[0084] This embodiment provides a repairing device and repairing method for heavy metal-contaminated soil, the repairing device such as figure 1 shown, including,

[0085] The rinsing system 1 is used for rinsing heavy metal contaminated soil to obtain a solution rich in heavy metal ions; figure 2 As shown, it includes a liquid storage tank 11 rich in heavy metal ion solution, a spray device 12, a soil storage tank 13, a spiral conveyor belt 14 and a shower system housing 15; the spray device 12 includes a spray tank 121, a shower head 122 and The dosing device 123, the eluent is stored in the spray tank 121, the spray device 12 is arranged on the top of the elutriation system 1, the liquid storage tank is arranged at the bottom of the elutriation system, and the spiral conveyor belt 14 transports the heavy metal contaminated soil from bottom to bottom. The eluent is conveyed on the top, and the eluent passes through the nozzle 122 and then passes through the spiral conveyor...

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Abstract

The invention belongs to the technical field of soil repairing and in particular relates to a repairing device and a repairing method for heavy metal polluted soil. The device comprises a spraying system and a membrane distillation system. By adopting the device, the spraying system and the membrane distillation system are integrated for a first time to repair polluted soil, and compared with theprior art, the device is small in size, high in efficiency, low in working intensity, simple in structure, easy to operate and small in water consumption amount and has the advantages of high efficiency, stability, economy and environmental-friendliness. The membrane distillation system in the device comprises a power supply, a crystallizer and at least one membrane distillation array structure, the power supply is adopted to provide electric signals to the membrane distillation array structure, microorganisms in a waste liquid can be inhibited from forming a pollution layer on a membrane surface, crystals which are formed by inorganic pollution on the membrane surface and degrade properties of a membrane material can be prevented, a good membrane pollution prevention capability is achieved, meanwhile, a solution rich in heavy metal ions can be effectively separated, a separated waste liquid can be crystallized and recycled, and advantages of high efficiency, economy and environmental-friendliness can be achieved.

Description

technical field [0001] The invention belongs to the technical field of soil remediation, and in particular relates to a remediation device and method for heavy metal polluted soil. Background technique [0002] At present, my country's soil is seriously polluted by heavy metals. More than 10% of the arable land is polluted by heavy metals, resulting in an annual reduction of about 10 million tons of grain production, and 12 million tons of inedible grain due to heavy metal pollution, causing at least 2 million million in economic losses. [0003] Soil remediation technology mainly includes three methods: biological remediation, chemical remediation and physical remediation. Bioremediation technology is safe, low in cost, and has no secondary pollution. Good, long-term effect, but in the chemical remediation technology, the method of leaching and soil performance improvement is often used to repair the heavy metals in the soil, but the leaching method will generate a large am...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/08B09C1/02B01D61/36
CPCB01D61/364B01D61/366B09C1/02B09C1/08
Inventor 吴娅明陈清梁英姜龙杰沈蔚然张鹏
Owner 南京华创环境技术研究院有限公司