Two-phase extraction well

Abstract

The utility model relates to the technical field of soil groundwater remediation, in particular to a two-phase extraction well. Comprising an extraction unit, a double-phase extraction pipe, a gas-liquid separator, a vacuum pump and a tail gas treatment unit, the double-phase extraction pipe is communicated with the extraction unit, the gas-liquid separator is communicated with the double-phase extraction pipe, and the vacuum pump is respectively communicated with the gas-liquid separator and the tail gas treatment unit. Comprising soil gas, underground water and NAPL, gaseous, water-soluble and non-water-soluble liquid pollutants are sucked to the ground from the underground and enter the gas-liquid separator to realize multiphase separation, and finally, the gas is treated by the tail gas treatment unit through operation of the vacuum pump, so that the extraction effect of the NAPL is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of soil and groundwater restoration, in particular to a two-phase extraction well. Background Art

[0002] Multiphase extraction technology is an in-situ remediation technology that remediates contaminated soil and groundwater below the ground by simultaneously extracting soil gas and groundwater including non-aqueous phase fluid (NAPL), and its main target medium for remediation is groundwater. The remediation of the vadose zone soil mainly relies on soil gas extraction and bioventilation formed by extracting soil gas in the unsaturated zone in the extraction well, while the remediation of groundwater is due to the groundwater pumping out and free phase recovery under vacuum in the extraction well.

[0003] Currently, the extraction effect of NAPL using multiphase extraction technology in soil and groundwater remediation is poor. Utility Model Content

[0004] The utility model aims to provide a two-phase extraction well, which solves the problem of poor extraction effect of NAPL in multiphase extraction technology used in soil and groundwater remediation.

[0005] To achieve the above-mentioned purpose, the utility model adopts a two-phase extraction well, including an extraction unit, a two-phase extraction pipe, a gas-liquid separator, a vacuum pump and a tail gas treatment unit, the two-phase extraction pipe is connected to the extraction unit, the gas-liquid separator is connected to the two-phase extraction pipe, and the vacuum pump is respectively connected to the gas-liquid separator and the tail gas treatment unit.

[0006] Wherein, the extraction unit comprises an extraction well and a submersible pump, the submersible pump is arranged inside the extraction well, and one end of the two-phase extraction pipe is connected to the submersible pump.

[0007] Among them, the gas-liquid separator includes a separation tank and a cyclone reversing tube, the top of the separation tank has an air outlet, the bottom of the separation tank has a liquid discharge port, the cyclone reversing tube is spirally arranged inside the separation tank, and the two-phase extraction tube is connected to the separation tank.

[0008] Wherein, the tail gas treatment unit comprises a treatment box and filling particles, the treatment box is connected to the vacuum pump, and the filling particles are filled in the interior of the treatment box.

[0009] Wherein, the two-phase extraction well also includes an air compressor and a ventilation pipe, one end of the ventilation pipe is connected to the air compressor, and the other end of the ventilation pipe is connected to the extraction well.

[0010] The utility model discloses a two-phase extraction well, which uses the extraction unit to extract gas and liquid from the contaminated area, including soil gas, groundwater and NAPL, and pumps gaseous, water-soluble and non-water-soluble liquid pollutants from underground to the ground, and enters the gas-liquid separator to achieve multi-phase separation, and finally operates through the vacuum pump and uses the tail gas treatment unit to process the gas, thereby improving the extraction effect of NAPL. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0012] Figure 1 It is a structural schematic diagram of a two-phase extraction well of the utility model.

[0013] 11-extraction well, 12-submersible pump, 20-two-phase extraction pipe, 31-separation tank, 32-swirl reversing pipe, 33-gas outlet, 34-liquid discharge port, 40-vacuum pump, 51-processing box, 52-filling particles, 60-air compressor, 70-ventilation pipe. DETAILED DESCRIPTION

[0014] See also Figure 1 ,in Figure 1 It is a structural schematic diagram of a two-phase extraction well.

[0015] The utility model provides a two-phase extraction well: comprising an extraction unit, a two-phase extraction pipe 20, a gas-liquid separator, a vacuum pump 40 and a tail gas treatment unit, wherein the two-phase extraction pipe 20 is connected to the extraction unit, the gas-liquid separator is connected to the two-phase extraction pipe 20, and the vacuum pump 40 is respectively connected to the gas-liquid separator and the tail gas treatment unit.

[0016] In this embodiment, the extraction unit is used to extract gas and liquid in the contaminated area, including soil gas, groundwater and NAPL, and gaseous, water-soluble and non-water-soluble liquid pollutants are sucked from underground to the ground and enter the gas-liquid separator to achieve multi-phase separation. Finally, the vacuum pump 40 is operated and the exhaust gas treatment unit is used to treat the gas, thereby improving the extraction effect of NAPL.

[0017] Furthermore, the extraction unit includes an extraction well 11 and a submersible pump 12 . The submersible pump 12 is disposed inside the extraction well 11 , and one end of the two-phase extraction pipe 20 is connected to the submersible pump 12 .

[0018] In this embodiment, the extraction well 11 is located in the contaminated area. Through the operation of the submersible pump 12, the gas and liquid in the contaminated area are extracted from the two-phase extraction pipe 20 into the gas-liquid separator. The gas and liquid in the contaminated area include soil gas, groundwater and NAPL. The gaseous, water-soluble and non-water-soluble liquid pollutants are sucked from underground to the ground and enter the gas-liquid separator to achieve multi-phase separation. Finally, the vacuum pump 40 is operated and the exhaust gas treatment unit is used to treat the gas, thereby improving the extraction effect of NAPL.

[0019] Furthermore, the gas-liquid separator includes a separation tank 31 and a swirl reversing tube 32, the top of the separation tank 31 has an air outlet 33, the bottom of the separation tank 31 has a liquid discharge port 34, the swirl reversing tube 32 is spirally arranged inside the separation tank 31, and the two-phase extraction tube 20 is connected to the separation tank 31.

[0020] In this embodiment, soil gas, groundwater and NAPL enter the separation tank 31 and are subjected to gravity centrifugal separation using the cyclone reversing tube 32 to achieve multi-phase separation.

[0021] Furthermore, the exhaust gas treatment unit includes a treatment box 51 and filling particles 52 . The treatment box 51 is connected to the vacuum pump 40 , and the filling particles 52 are filled in the treatment box 51 .

[0022] In this embodiment, the extraction well 11 is located in the contaminated area, and the submersible pump 12 is operated to extract the gas and liquid in the contaminated area from the two-phase extraction pipe 20 into the gas-liquid separator; at the same time, the air compressor 60 is operated to blow compressed air into the extraction well 11 through the ventilation pipe 70 to improve the extraction efficiency; the gas and liquid in the contaminated area include soil gas, groundwater and NAPL, and the gaseous, water-soluble and non-water-soluble liquid pollutants are sucked from underground to the ground and enter the gas-liquid separator to achieve multi-phase separation, and finally the vacuum pump 40 is operated to allow the gas to enter the treatment box 51, and the filling particles 52 are activated carbon, and the gas is purified by the filling particles 52.

[0023] Furthermore, the two-phase extraction well also includes an air compressor 60 and a ventilation pipe 70 , one end of the ventilation pipe 70 is connected to the air compressor 60 , and the other end of the ventilation pipe 70 is connected to the extraction well 11 .

[0024] In this embodiment, the extraction well 11 is located in the contaminated area, and the submersible pump 12 is operated to extract the gas and liquid in the contaminated area from the two-phase extraction pipe 20 into the gas-liquid separator; at the same time, the air compressor 60 is operated to blow compressed air into the extraction well 11 through the ventilation pipe 70 to improve the extraction efficiency; the gas and liquid in the contaminated area include soil gas, groundwater and NAPL, and the gaseous, water-soluble and non-water-soluble liquid pollutants are sucked from underground to the ground and enter the gas-liquid separator to achieve multi-phase separation, and finally the vacuum pump 40 is operated and the exhaust gas treatment unit is used to treat the gas, thereby improving the extraction effect of NAPL.

[0025] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Ordinary technicians in this field can understand that all or part of the processes of the above embodiment and equivalent changes made according to the claims of the present invention still fall within the scope covered by the utility model.

Claims

1. A two-phase extraction well, characterized in that: It includes an extraction unit, a two-phase extraction pipe, a gas-liquid separator, a vacuum pump and a tail gas treatment unit, wherein the two-phase extraction pipe is connected to the extraction unit, the gas-liquid separator is connected to the two-phase extraction pipe, and the vacuum pump is respectively connected to the gas-liquid separator and the tail gas treatment unit; The extraction unit comprises an extraction well and a submersible pump, wherein the submersible pump is arranged inside the extraction well, and one end of the two-phase extraction pipe is connected to the submersible pump; The two-phase extraction well also includes an air compressor and a ventilation pipe, one end of the ventilation pipe is connected to the air compressor, and the other end of the ventilation pipe is connected to the extraction well.

2. The dual-phase extraction well according to claim 1, characterized in that: The gas-liquid separator includes a separation tank and a cyclone reversing tube. The top of the separation tank is provided with an air outlet, the bottom of the separation tank is provided with a liquid discharge port, the cyclone reversing tube is spirally arranged inside the separation tank, and the two-phase extraction tube is connected to the separation tank.

3. The dual-phase extraction well according to claim 1, characterized in that: The tail gas treatment unit comprises a treatment box and filling particles. The treatment box is connected to the vacuum pump, and the filling particles are filled in the interior of the treatment box.

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