Organic polluted soil thermal desorption system capable of not generating secondary pollution to environment

Abstract

The invention relates to an organic polluted soil thermal desorption system capable of not generating the secondary pollution to the environment. The organic polluted soil thermal desorption system comprises a reversed thermal desorption device, and a first-grade dust remover, a second-grade combustion chamber, a condensation and deacidification device, a smoke absorption device, a gas-liquid separator, a second-grade dust remover, a smoke adsorption device with a condenser, and a central computer control unit which are connected in sequence. The organic polluted soil thermal desorption system is characterized in that a water outlet of the condensation and deacidification device is connected with a water inlet of an organic wastewater treatment device by a medicine adding tank; a water outlet of the organic wastewater treatment device is connected with a water inlet of the condensation and deacidification device and a mud outlet of the organic wastewater treatment device is connected with a drying tank; a water outlet of the gas-liquid separator is connected with a water inlet of the smoke adsorption device; a water outlet of the smoke adsorption device is connected with a water inlet of the medicine adding tank; a cooling-water water outlet is connected with a cooling-water water inlet of the condensation and deacidification device, and a gas discharging opening is communicated with the atmosphere; a discharging opening of the reversed thermal desorption device, solid dust outlets of the first-grade dust remover and the second-grade dust remover, and a dry mud outlet of the drying tank are communicated with a baking-free brick machine; the baking-free brick machine, the medicine adding tank and the organic wastewater treatment device are connected with the central computer control unit.

Description

technical field [0001] The invention relates to the field of remediation of organic polluted soil, in particular to a thermal desorption system for organic polluted soil that does not cause secondary pollution to the environment. Background technique [0002] With the development of society, technology and economy, people's living standards and health levels are constantly improving, which puts forward higher requirements for the realization of a green environment, and the control of environmental pollution has become an important issue in urban construction. At present, due to the influence of high-pollution enterprises such as steel, chemical industry, and pesticides, a large amount of high-pollution risk soil remains. The danger is that the organic matter in these soils will pollute the surrounding air and water, and bring harm to human life and health. Therefore, the remediation and treatment of organic polluted soil has become an important content of environmental prote...

AI Technical Summary

Problems solved by technology

[0004] The main technical defect of the existing organic polluted soil thermal desorption system is: the waste water produced after the flue gas purification and the solid dust after the dust removal by the first-stage dust collector and the second-stage dust collector are not treated, and then enter the surrounding area. environment, secondary pollution

In addition, the whole system is operated in an open environment, so the gas and scattered solid dust caused by system leakage during the excavation of soil and system operation will also pollute the surrounding environment

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