Device for in-situ environmental remediation in organic pollution site

Abstract

The invention relates to a device for in-situ environment remediation in an organic pollution site. The device comprises a water supply system, a water heating system, a flow valve, a superheated steam in-situ injection system, a monitoring well, a soil gas stripping and ground waste gas and wastewater processing system and the like. Water from the water supply system is fast heated by using the high-frequency water heating system and then enters the high-frequency superheated steam in-situ injection system through control of the flow valve, so that the superheated steam in-situ injection is realized; and meanwhile, the remediation effect is enhanced by using the soil gas stripping and ground waste gas and wastewater processing system, and a remediation effect is observed by the monitoring well. The device has the advantages that the problems that the heating speed is low, the steam injection temperature s low and the like of the traditional heating system are solved, organic pollutants which are high in boiling point and difficult to volatilize are efficiently removed, and meanwhile, energy can be saved by 50 percent.

Description

technical field [0001] The invention relates to a device for in-situ environmental restoration of organic polluted sites, which belongs to the technical field of environmental protection and is mainly used in the restoration of soil and groundwater polluted by volatile and semi-volatile organic substances, and is especially suitable for polluted sites where high boiling points are difficult. Removal of volatile organic pollutants. Background technique [0002] Organic pollution sites refer to space areas that are harmful to human health or the environment or have potential risks due to accumulation, storage, treatment, disposal or other means (such as migration) of harmful organic substances. Organic pollutants include volatile and Semi-volatile organic substances, such as diesel oil, crude oil, pesticides, halogenated hydrocarbons, benzene series, etc. According to different methods, its treatment and restoration are mainly divided into in-situ restoration and ex-situ rest...

AI Technical Summary

Problems solved by technology

However, this device has the following disadvantages: its steam injection system uses common steam generators such as steam boilers to produce saturated steam. The temperature of the steam is relatively low, but the pressure is high. It takes a long time to heat the steam during use, and the energy utilization efficiency is not high. At the same time, the removal effect of organic pollutants with high boiling point and low volatility is not ideal

This process uses microwave / radio frequency to directly heat the soil, which has low heating efficiency, high cost, and potential electromagnetic wave radiation pollution.

In addition, considering the loss of heat, the temperature of the water vapor generated by the air stripping recovery system is low, and the effect of reinjection on pollutant removal enhancement will inevitably be affected.

Images