31 results about "Soil vapor extraction" patented technology

The invention discloses a chlorobenzene contaminated soil strengthening gas phase repairing device, an underbrush device thereof, and a method of processing the chlorobenzene contaminated soil by utilizing the repairing device. The repairing device comprises multiple heating extractors which are arranged in a regular triangle or square manner, wherein the heating extractors comprise heating sources and extracting pipes, the heating sources are arranged in extracting pipes, and the heating sources are resistance wires; paddings and catalysts are arranged in the extracting pipes, and opening holes are formed in shells of the extracting pipes; the inner walls of the extracting pipes are provided with grids, extracting connecting pipes of all the heating extractors are connected together and are connected with a condensation unit, a gas-liquid separator and a vacuum pump in sequence, and the underbrush device also comprises a container for packing soil, heating extractors, a thermocouple and a numerical value temperature controller. The method comprises the following steps of distributing the multiple heating extractors in the middle of a repairing place at intervals being 2-5 meters according to a regular triangle or the square, intermittently extracting, controlling the temperatures of the heating sources at 400 DEG C, and heating 120 hours. The chlorobenzene contaminated soil strengthening gas phase repairing device, the underbrush device thereof and the method provided by the invention have the advantages that the repairing effect of chlorobenzene contaminated soil is obvious in short time, and the removal rate of a contaminant is high.

The invention provides an in-situ repair system and an in-situ repair method for deep layer stirring-hot air injection of polluted soil. According to the in-situ repair system, the lower end of a hot air spray pipe is communicated with a drill body core pipe in a drill; the upper end of the hot air spray pipe is communicated with an air outlet of a hot air compressor; and a mixed air-liquid pipeline is connected between a coverage cover and an air-liquid separator. According to the method, the drill is drilled in a target soil layer up and down in a reciprocating mode according to designed elevation, wherein the diameter of a stirring drill hole is 1.5 to 2.5 meters, the depth of the stirring drill hole is 9 to 12 meters, the injection pressure of hot air is 1 to 2 MPa, and the temperature of the hot air is 90 to 110 DEG C. According to the technology of the in-situ repair system and the in-situ repair method, the application range of strata can be expanded to low-middle permeable strata, and the range of the types of applicable pollutants is also increased, for example, the technology is still valid to semivolatile organic matters such as anilines. By the in-situ repair system and the in-situ repair method, the problem of 'smearing' of a soil vapor extraction (SVE) technology in the later period of repair can be solved, so that the repair efficiency is improved greatly, and the repair period is shortened greatly.

The invention provides a solar ventilation system device for remediation of a contaminated site. The device comprises a solar power supply control system, and an aeration system and an air extraction system, which are distributed in a soil remediation area, wherein the solar power supply control system is used for collecting solar energy and discharging the solar energy to the aeration system and the air extraction system for use; the aeration system is used for delivering air to the soil remediation area; the air extraction system is used for extracting organic contaminants from the soil remediation area. According to the device, the solar energy is adopted for power generation, so that electric energy is effectively saved, and constraints of cost such as the landform and electric wires are broken; soil vapor extraction and ventilation remediation technologies are coupled to rapidly and effectively remove volatile organic matters and biodegradable organic matters in soil; the soil can be safely reutilized after quality improvement and purification; the device is convenient to mount, wide in application range, flexible in operation, lower in running cost and free of secondary pollution.

The invention belongs to the technical field of in-situ remediation of soil pollution, and particularly relates to a system and a method for removing organic pollutants in soil employing microwave-assisted soil vapor extraction (SVE). The method comprises the following steps: injecting a microwave-assisted material into soil to be repaired; paving an airtight cover membrane on the surface of the area of the soil to be repaired; providing one or more pumping wells in the area of the soil to be repaired; providing a plurality of air injection wells, monitoring wells and injection pipelines within a theoretical coverage range of the pumping wells. By adopting the method, a microwave is adopted as a heat source, so that various of organic pollutants in the soil are primarily processed by volatilization and decomposition mechanisms; desorption of adsorbed state organic matters in soil particles is facilitated; steam state formation of volatile organic compounds (VOCs) is accelerated; the extracted steam is processed by a ground waste gas and wastewater treatment device, so as to achieve the target of repairing the organic polluted soil. The technology has the advantages of being low in cost, strong in maneuverability, wide in range of processing organic matters, free of damage to a soil structure, free of secondary pollution and the like, can adopt standard equipment, and has a broad application prospect.

The invention relates to a system for in-situ enhanced gas phase extraction and repair of soil organic pollutants by solar energy. Including gas phase extraction pipe 4 pipelines, water circulation system pipelines buried in organic pollutant soil, solar heat collection system 1, insulated water tank 2, gas purification system, soil water replenishment system; water circulation system pipelines and solar heat collection on the ground The system 1 is connected to form a solar circulating water heating system, the pipeline of the water circulation system is connected to the thermal insulation water tank 2 to form a thermal storage circulating water system of the thermal insulation tank, and the solar thermal collection system 1 is connected to the thermal insulation tank 2 to form a combined solar-thermal insulation tank heating system; There are pumps 12, 13, valves 7, 8, 9, 10, 11 on the pipelines of the solar circulating water heating system, the heat storage circulating water system of the insulated water tank, and the combined circulation water heating system of the solar-insulated water tank; 4 pipelines of gas phase extraction pipes It is connected with the gas purification system on the ground. This system uses solar energy to strengthen in-situ gas phase extraction to repair soil organic pollutants. The system is compact, easy to operate, and energy-saving.

A system and method for combined microorganism degradation and air sparging-soil vapor extraction (AS-AVE) of oil-containing sludge can include a microorganism-adding unit, an AS-SVE unit, a metering-feeding layer, a mixing layer, a material discharging layer and a crawler-type conveyor. In some embodiments the microorganism-adding unit and the AS-SVE unit can include a microorganism storage tank and an AS-SVE storage tank. In some embodiments, the metering-feeding layer can include a valve, a pressure gauge, a flowmeter, a feeding chamber. In some embodiments, the mixing layer can include pipeline connectors and a stirrer. In some embodiments, the material discharging layer is mainly for transporting the treated soil away. The system can remove petroleum, petroleum hydrocarbons, volatile organic compounds (VOCs), and degradable and extractable contaminants from oil-containing sludge by a method combining microorganism degradation, mechanical stirring, AS-AVE and the like, thereby achieving soil remediation and automatic treatment in a large scale.

The invention discloses a simulating device for a soil vapor extraction technique. The simulating device for the soil vapor extraction technique comprises a three-dimensional test sand box, a vapor extraction device connected with the sand box, and a charcoal immobilization inoculums adding device. The vapor extraction device comprises an air injection pump, a flowmeter, an air injection well, an extraction well, an activated carbon filter and a vacuum pump. The charcoal immobilization inoculums adding device comprises a pressurizing injection pump and an injection well. The invention further provides the charcoal immobilization inoculums adding device and the three-dimensional test sand box. By the adoption of the simulating device, a soil vapor extraction test, a charcoal immobilization inoculums degradation test and a vapor extraction simulation test strengthen through charcoal immobilization inoculums can be conducted under a homogeneous or heterogeneous soil layer condition; various parameters which mainly include the aeration flow, the extraction flow, the vacuum degree and the like can be monitored in real time during the tests; meanwhile, sampling measurement can be conducted on soil samples or gas samples in different positions in a soil layer at different stages of the tests, and thus the repairing effect of the soil vapor extraction technique strengthen through the charcoal immobilization inoculums on a contaminated site can be determined.