System for comprehensive treatment of saturation zone and aeration zone

Abstract

The invention provides a system for comprehensive treatment of a saturation zone and an aeration zone, which comprises an injection system, a multiphase extraction system and a tail gas and tail watertreatment system, and is characterized in that the injection system injects high-pressure air into soil through air compression equipment and an injection well; the multiphase extraction system is composed of a gas phase extraction well, a multiphase extraction well and an NAPL phase extraction device; the gas phase extraction well is used for extracting polluted gas in soil, an underground waterextraction pipe in the multiphase extraction well can extract polluted water, and the NAPL phase extraction device can accurately extract NAPL phase pollutants; the tail gas and tail water treatmentsystem can treat the extracted gas phase, liquid phase and NAPL phase until the gas phase, liquid phase and NAPL phase are safely discharged or collected. The multiphase extraction technology and theNAPL accurate extraction technology are introduced, so that the repairing time is shortened, and meanwhile, the trailing problem is solved.

Description

technical field [0001] The invention relates to a system for extracting and treating soil gas, ground water and oil slick layers in underground polluted areas. Background technique [0002] For underground polluted areas, multiphase extraction technology is generally used for treatment, that is, through vacuum extraction, the soil gas, groundwater and oil slick layer in underground polluted areas are extracted to the ground for phase separation and treatment, so as to control and repair the gap between soil and groundwater. Organic pollutants, to achieve the purpose of site restoration. [0003] Multiphase extraction has the advantages of less environmental disturbance and simultaneous restoration of groundwater and soil. It is suitable for polluted land such as oil companies and gas stations. [0004] However, since the LNAPL phase (light non-aqueous liquid) floats on the groundwater, it is difficult for the traditional multiple extraction techniques to extract the LNAPL p...

AI Technical Summary

Problems solved by technology

[0004] However, since the LNAPL phase (light non-aqueous phase liquid) floats on the groundwater, it is difficult for the traditional multi-extraction techniques to extract the LNAPL phase accurately, which often causes tailing phenomenon (that is, after a period of time after the treatment is completed, the LNAPL phase returns accumulation occurs)

Images