Method and device for repairing contaminated soil with persistent organic pollutants

A technology for organic pollutants and polluted soil, which is applied in the field of persistent organic pollutant-contaminated soil remediation, can solve the problems of limiting the scope of use of incineration and large-scale promotion, low purification efficiency of the process, and complex structure of incineration equipment, etc., to prevent Condensation, heat exchange promotion, and the effect of less flue gas

Active Publication Date: 2013-09-04
ZHEJIANG UNIV
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Problems solved by technology

There are two main defects of the incineration method: one is that the structure of the incineration equipment is complicated, the construction cost is high, and the operation cost is high, and it does not have good economy under the c

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  • Method and device for repairing contaminated soil with persistent organic pollutants
  • Method and device for repairing contaminated soil with persistent organic pollutants
  • Method and device for repairing contaminated soil with persistent organic pollutants

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Embodiment Construction

[0031]Referring to the above-mentioned accompanying drawings, the technical content of the present invention will be described in detail. The thick solid line in the figure indicates the direction of soil movement, the thin solid line indicates the direction of spray liquid movement, and the dotted line indicates the direction of gas movement.

[0032] figure 1 A set of persistent organic pollutant-contaminated soil remediation method and device is given, which consists of a thermal desorption body and tail gas treatment components. The thermal desorption body includes a sorter 1, a hopper 2, a feeder 3, an indirect heating thermal desorption 4, soil discharge device 5, inert gas generator 7, combustion system 6; tail gas treatment components include cyclone dust collector 8, primary spray tower 9, secondary adjustable spray tower 10, waste liquid purification circulation device 11, Dehumidifier 12, plasma reactor 13, air filter 14, induced draft fan 15, exhaust cylinder 16; ...

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Abstract

The invention relates to a method for repairing contaminated soil, and aims at providing a method and a device for repairing contaminated soil with persistent organic pollutants. The device comprises a separator, a material hopper, a material feeder and an indirect-heating thermal desorbing device which are connected with one another in sequence, wherein a soil emission device is connected to the bottom of the heating thermal desorbing device; a combustion system, a waste heat utilization device and an inert gas generator are respectively connected with the indirect-heating thermal desorbing device; the combustion system is connected with an outer barrel, and the inert gas generator is connected with an inner barrel; and a tail gas processing component comprises a cyclone dust extractor, a primary spray tower, a secondary regulating spray tower, a dehumidifier, a plasma reactor, an air filter, an induced draft fan and an exhaust barrel which are connected with one another in sequence. According to the method and the device for repairing contaminated soil with persistent organic pollutants disclosed by the invention, the amount of exhaust gas needing processing is less, water consumption is low, the persistent organic pollutants are thoroughly removed, the operation cost is reduced by 30%-60%, and the contaminated soil with persistent organic pollutants can be economically and effectively processed.

Description

technical field [0001] The invention relates to a set of persistent organic pollutant polluted soil remediation method and device. The persistent organic pollutants in the soil are desorbed through an indirect heating thermal desorption system, and the persistent organic pollutants in the soil are desorbed through a cyclone dust collector, a two-stage spray tower, and a plasma Reactors and other tail gas treatment components capture or degrade persistent organic pollutants, which belong to the field of environmental protection. Background technique [0002] Persistent Organic Pollutants (POPs) are highly toxic, persistent, easy to accumulate in organisms, and carry out long-distance migration and deposition. Some POPs are also carcinogenic and teratogenic. The main POPs are dioxins, polychlorinated biphenyls, organochlorine pesticides, hexachlorobenzene, etc. A large amount of soil in my country has been polluted by persistent organic pollutants, such as polychlorinated bip...

Claims

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Application Information

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IPC IPC(8): B09C1/06
Inventor 李晓东陆胜勇马增益严建华陈彤祁志福刘洁
Owner ZHEJIANG UNIV
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