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Pollution soil steam treatment method and apparatus

A technology of polluted soil and treatment method, applied in soil steam disinfection, restoration and application of polluted soil, etc., can solve the problems of large energy consumption, high energy consumption, blocked pipelines, etc.

Inactive Publication Date: 2003-10-15
UNIV OF SHANGHAI FOR SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This prior art has two major defects: 1, the system is very easily blocked
The reason is that in this device, due to heat conduction, the mud has been heated in the pipeline before entering the reactor, and it is easy to be dried in it and block the pipeline
2. In order to obtain high-speed steam flow so that the mud and steam are fully mixed, a large amount of energy consumption is required. Using the existing device to treat every kilogram of polluted dry soil consumes 100 kilograms of steam
Therefore higher energy consumption

Method used

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  • Pollution soil steam treatment method and apparatus
  • Pollution soil steam treatment method and apparatus

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Embodiment Construction

[0013] Embodiments of the present invention are described in conjunction with the accompanying drawings. Depend on figure 1 As shown, the contaminated soil steam treatment device consists of a stirring container 1, a mud pump 2, a flow control valve 3, a high-pressure reactor 4, a throttle valve 5, a low-pressure reactor 6, a cyclone separator 8, a condenser 9, and a liquid-liquid separator 10. Composed of water pump 12, cooling tower 13, condensing pressure control valve 14, and return flow control valve 15. The high-pressure reactor 4 is in the shape of a thin tube with a diameter of 3-10 mm. The low-pressure reactor 6 adopts slender straight pipes or coiled pipes with a pipe diameter of 10-20mm. The mud container 1 is connected to the mud pump 2 through the pipeline, and the high-pressure reactor 4 is connected through the flow control valve 3 , and its outlet is connected with the low-pressure reactor 6 through the throttle valve 5 . The outlet of the low-pressure react...

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Abstract

The present invention relates to steam treatment method and apparatus for pollutant soil. The apparatus consists of container, pump, flow rate valve, high pressure reactor, throttle, low pressure reactor, vortex separator, condensator, liquid-liquid separator, cooling tower, return flow valve and other parts. The slurry from the container and containing cycloarene and other pollutants is pumpedinto the high pressure reactor for heating, desorbed to make cycloarene and other pollutants into steam and separated in the separator. While the clean soil is exhausted, cycloarene and other pollutants and steam are condensed, liquid-liquid separated and exhausted.

Description

technical field [0001] The invention relates to a steam treatment method and device for polluted soil, which belongs to the environmental protection technology and is mainly used for large-scale decontamination treatment of soil containing polycyclic aromatic hydrocarbon pollutants (PAHs) and other low-volatility carcinogenic and toxic substances. It can also be used in chemical, mining, biochemical, petrochemical and other industries to remove low-volatility impurities contained in materials. Background technique [0002] In the process of large-scale washing and decontamination of polluted soil, a large number of fine soil particles with a diameter of less than 100 μm will be produced, and most of the pollutants contained in the soil are adsorbed on these ultrafine particles with a large adsorption area. These soil particles are stripped by water vapor at a temperature below 500°C, and the separation rate of the adsorbed mercury, mineral oil, polychlorinated biphenyls, and...

Claims

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Application Information

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IPC IPC(8): A01G11/00B09C1/06
Inventor 罗行李美玲马虎根
Owner UNIV OF SHANGHAI FOR SCI & TECH
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