CN112958604A - Gas-liquid separation method for in-situ remediation of polluted soil and underground water - Google Patents
Gas-liquid separation method for in-situ remediation of polluted soil and underground water Download PDFInfo
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- CN112958604A CN112958604A CN202110196972.2A CN202110196972A CN112958604A CN 112958604 A CN112958604 A CN 112958604A CN 202110196972 A CN202110196972 A CN 202110196972A CN 112958604 A CN112958604 A CN 112958604A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/002—Reclamation of contaminated soil involving in-situ ground water treatment
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C2101/00—In situ
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Abstract
The invention discloses a gas-liquid separation method for in-situ remediation of polluted soil and underground water, which is carried out by a gas-liquid separation device; the device comprises a box body, a fluid inlet, a water outlet, an exhaust port, a demister, a liquid level meter interface, an oil outlet, a clean discharge port, an upper baffle plate, a lower baffle plate and a supporting piece; the box body is a cuboid; the fluid inlet is arranged at the upper part of the end face of the front end of the box body, the water outlet is arranged at the lower part of the end face of the same end, and the oil outlet is arranged at the lower part of the end face of the rear end of the box body; the gas vent, the demister and the liquid level meter interface are arranged at the top end of the box body, the emptying port is arranged on the side face of the box body, the upper baffle is arranged above the inside of the box body, the lower baffle is arranged below the inside of the box body, and the supporting piece is arranged on the bottom face of the box body. The invention provides the gas-liquid separation method which has the advantages of simple structure, good stability, high gas-liquid separation efficiency, oil-water separation function and capability of being generally and effectively applied to the in-situ remediation construction process of the soil and underground water polluted land.
Description
Technical Field
The invention relates to a gas-liquid separation method used in the technical field of polluted site soil and underground water restoration, in particular to a ground gas-liquid separation method required by in-situ restoration technologies such as in-situ multiphase extraction restoration and in-situ thermal desorption restoration of polluted soil and/or underground water.
Background
With the advance of the urbanization process and the adjustment of the industrial structure, the industrial enterprises of pesticide, chemical industry and the like in large and medium-sized cities gradually stop or move away from urban areas, and meanwhile, a large amount of organic matter polluted plots are left to be subjected to the soil groundwater remediation work. The multiphase extraction technology is an environment-friendly in-situ remediation technology aiming at organic pollution of soil and underground water, has the advantages of simple and reliable system, capability of treating high-concentration polluted plots, high remediation efficiency, controllable secondary pollution and the like, and mainly extracts soil gas, underground water and non-aqueous phase liquid (NAPL) in an underground pollution area to the ground through a vacuum extraction means to carry out gas-liquid phase separation and subsequent respective treatment so as to remediate and remove organic pollutants in the soil and the underground water and realize plot remediation. In addition, the in-situ thermal desorption technology capable of repairing the organic polluted land mass more efficiently also relates to a multi-phase extraction technology, the essence of the technology is a heat-enhanced multi-phase extraction technology, and the repairing process also relates to simultaneous extraction of gas-liquid phase pollutants under the action of vacuum, gas-liquid phase separation after cooling and condensation and subsequent respective treatment.
The multiphase extraction system is generally composed of three main parts, namely a multiphase extraction unit, a gas-liquid phase separation unit and a ground pollutant treatment unit, wherein a gas-liquid separation device is an important device of the multiphase extraction system and is mainly used for effectively separating gas-liquid phase fluid mixed and extracted to the ground, and then respectively carrying out subsequent wastewater and waste gas treatment and waste liquid treatment. Common gas-liquid separation devices in the market generally mainly take gravity settling, centrifugal separation or baffling separation forms, and various problems of large equipment volume, low gas-liquid separation efficiency, large running resistance, poor tolerance to gas-liquid ratio and load change, additional separation of oil phase and water phase in liquid phase, easy blockage and the like generally exist in the using process of repair engineering, so that a new technical scheme is required to be provided for solving the problems.
Disclosure of Invention
The invention aims to provide a gas-liquid separation method, overcomes the defects of the gas-liquid separation method in the application of the existing restoration engineering, has simple structure, good stability and high gas-liquid separation efficiency, has an oil-water separation function, and can be widely and effectively applied to the in-situ restoration construction process of soil and underground water polluted plots.
In order to achieve the aim, the invention provides a gas-liquid separation method for in-situ remediation of polluted soil groundwater, wherein the gas-liquid separation method is carried out by a gas-liquid separation device; the gas-liquid separation device comprises a box body, and a fluid inlet, a water outlet, an exhaust port, a demister, a liquid level meter interface, an oil outlet, a clean discharge port, an upper baffle plate, a lower baffle plate and a support piece which are arranged on the box body; the box body is a cuboid with a hollow interior; the fluid inlet is arranged at the upper part of the end face of the front end of the box body, the water outlet is arranged at the lower part of the end face of the same end, and the oil outlet is arranged at the lower part of the end face of the rear end of the box body; the gas vent, the demister and the liquid level meter interface are arranged at the top end of the box body, the emptying port is arranged on the side face of the box body, the upper baffle is arranged above the inside of the box body, the lower baffle is arranged below the inside of the box body, and the supporting piece is arranged on the bottom face of the box body.
The gas-liquid separation method for in-situ remediation of the polluted soil and the groundwater is characterized in that the upper baffle is vertically arranged in the box body from the top surface of the box body downwards, and the lower baffle is vertically arranged in the box body from the bottom surface of the box body upwards.
The gas-liquid separation method for in-situ remediation of the polluted soil and the groundwater comprises the steps that the upper baffle and the lower baffle are arranged at positions which equally divide the box body into three parts along the length direction, the upper baffle is close to the front end of the box body, and the lower baffle is close to the rear end of the box body.
The gas-liquid separation method for in-situ remediation of the polluted soil and the groundwater comprises the following steps that two liquid level meter interfaces are arranged, wherein the two liquid level meter interfaces are respectively a first liquid level meter interface arranged behind a lower baffle plate and a second liquid level meter interface arranged in front of the lower baffle plate; the first liquid level meter interface is arranged at an exhaust port at the top end of the box body, and the second liquid level meter interface is arranged at the middle section at the top end of the box body.
The gas-liquid separation method for in-situ remediation of the polluted soil and the groundwater is characterized in that the exhaust port is arranged close to the rear end of the box body, and the demister is arranged at the top of the exhaust port.
In the gas-liquid separation method for in-situ remediation of the polluted soil and the groundwater, two support pieces are arranged and are respectively positioned below the long edges at the two sides of the bottom end of the box body and fixed with the box body.
The gas-liquid separation method for in-situ remediation of the polluted soil and the groundwater comprises the steps that the box body, the fluid inlet, the water outlet, the air outlet, the demister, the liquid level meter interface, the oil outlet, the oil discharging port, the cleaning port, the upper baffle plate, the lower baffle plate and the supporting piece are all made of metal materials.
According to the gas-liquid separation method for in-situ remediation of the polluted soil and the groundwater, the inner walls of the box body, the fluid inlet, the water outlet, the exhaust port, the demister, the liquid level meter interface, the oil discharge port and the drain port are coated with anticorrosive coatings; the material of the anticorrosive coating adopts epoxy resin.
The gas-liquid separation method for in-situ remediation of the polluted soil and the underground water is characterized in that the outer surfaces of the box body, the fluid inlet, the water outlet, the air outlet, the demister, the liquid level meter interface, the oil outlet, the clean discharge port, the upper baffle plate, the lower baffle plate and the support piece are coated with antirust paint.
The gas-liquid separation method for in-situ remediation of the polluted soil groundwater is characterized by comprising the following steps: when the gas-liquid separation device is used, the demister is connected with the suction pump, the oil discharge port is connected with the oil discharge pump, the water discharge port is connected with the drainage pump, and the emptying port is connected with the sludge discharge pump; starting a suction pump to pump the gas-liquid mixed fluid with underground pollution into the box body through a fluid inlet, enabling the fluid to collide and separate with the upper baffle after entering the box body, enabling the separated gas to bypass the upper baffle to further collide with the liquid in the box body and the liquid at the bottom, then discharging the gas together through a demister through an exhaust port above the method, and enabling underground water, non-aqueous phase liquid and silt to fall into the box body; the lower baffle in the box body intercepts heavy non-aqueous phase liquid and silt, overflows the light non-aqueous phase liquid and is discharged from an oil discharge port through an oil discharge pump; after the extraction system normally operates, the liquid level in the box body of the gas-liquid separation method gradually rises, when the liquid level at the front end of the lower baffle plate reaches a high liquid level, a liquid level meter of a second liquid level meter interface arranged at the front end of the lower baffle plate delays through signal transmission and then starts a drainage pump, in the delay time, the liquid level in the box body is higher than the upper end of the lower baffle plate, a light non-aqueous phase liquid phase floating on the liquid level crosses the lower baffle plate and overflows into the box body at the rear end, when the liquid level at the rear end reaches the high liquid level, a liquid level meter of a first liquid level meter interface arranged at the rear end of the lower baffle plate starts an oil drainage pump through signal transmission, and a light non-aqueous phase liquid layer and underground water containing high light non-aqueous phase; after the delay time is over, the draining pump is automatically started to drain the polluted underground water or the underground water containing a small amount of light non-aqueous phase liquid from the draining port; during operation, when the silt amount at the bottom of the box body is accumulated excessively, the mud pump is manually started to discharge the silt-containing fluid from the emptying port.
The gas-liquid separation method for in-situ remediation of the polluted soil and the underground water provided by the invention has the following advantages:
(1) the method can be widely applied to the in-situ remediation construction process of the soil and underground water polluted land, and the gas, liquid and solid phases can be effectively separated by matching with technologies such as multiphase extraction, in-situ thermal desorption and the like;
(2) the method separates gas, liquid and solid by the principles of hydrodynamics and gravity, and is simple, stable in operation, portable in use, economical and effective;
(3) the gas-liquid separation device adopted by the method is provided with the bottom emptying port, and sludge can be discharged periodically, so that the problem of internal silting of the method is solved;
(4) the gas-liquid separation device is not internally provided with any complex structural member or filtering material, thereby reducing the wind resistance and wind pressure loss inside the box body and prolonging the service life of the box body;
(5) the gas-liquid separation device is internally provided with a liquid level meter, and the oil-water separation function and the drainage and oil discharge function of the method can be realized by adopting a delayed pump starting mode according to the height of the liquid level in the box body;
(6) the gas outlet of the gas-liquid separation device is provided with the demister, so that the moisture content of gas volatilized from a gas-liquid separation method can be further reduced, the protection of equipment such as a fan and an activated carbon tank is facilitated, and the improvement of the efficiency of waste gas treatment is facilitated.
Drawings
FIG. 1 is a schematic structural diagram of a gas-liquid separation method for in-situ remediation of polluted soil groundwater according to the present invention.
FIG. 2 is a view from the front end of the apparatus for the gas-liquid separation method for in situ remediation of groundwater from contaminated soil according to the present invention.
Wherein: 1. a box body; 2. a fluid inlet; 3. a water outlet; 4. an exhaust port; 5. a demister; 6. a first level meter interface; 7. a second level gauge interface; 8. an oil discharge port; 9. putting a clean mouth; 10. an upper baffle plate; 11. a lower baffle plate; 12. and a support member.
Detailed Description
The following further describes embodiments of the present invention with reference to the drawings.
As shown in fig. 1 and 2, the gas-liquid separation method for in-situ remediation of groundwater contaminated by the invention is carried out by a gas-liquid separation device; the gas-liquid separation device comprises a box body 1, and a fluid inlet 2, a water outlet 3, an exhaust port 4, a demister 5, a liquid level meter interface, an oil discharge port 8, a clean discharge port 9, an upper baffle plate 10, a lower baffle plate 11 and a support 12 which are arranged on the box body 1; the box body 1 is a cuboid with a hollow interior; the fluid inlet 2 is arranged at the upper part of the end face of the front end of the box body 1 along the length direction, the water outlet 3 is arranged at the lower part of the end face of the same end, and the oil outlet 8 is arranged at the lower part of the end face of the rear end of the box body 1; the gas vent 4, the demister 5 and the liquid level meter interface are arranged at the top end of the box body 1, the emptying port 9 is arranged on the side face of the box body 1, the upper baffle is arranged above the inside of the box body 1, the lower baffle is arranged below the inside of the box body 1, and the supporting piece 12 is arranged on the bottom face of the box body 1.
The upper baffle is vertically arranged from the top surface of the box body 1 to the bottom inside the box body 1, and the lower baffle is vertically arranged from the bottom surface of the box body 1 to the top inside the box body 1.
The box body 1 is equally divided into three parts along the length direction at the set position of the upper baffle and the lower baffle, the upper baffle is close to the front end of the box body 1, and the lower baffle is close to the rear end of the box body 1.
The level gauge interfaces are provided with two, respectively a first level gauge interface 6 arranged behind the lower baffle 11 and a second level gauge interface 7 arranged in front of the lower baffle 11.
The first liquid level meter interface 6 is arranged at the exhaust port 4 at the top end of the box body 1, the second liquid level meter interface 7 is arranged at the middle section at the top end of the box body 1, and the distance between the second liquid level meter interface 7 and the front end and the rear end of the box body 1 is equal. The first liquid level meter interface 6 and the second liquid level meter interface 7 are positioned on the same line parallel to the long edge of the top surface of the box body 1.
The setting position of gas vent 4 is close to box 1 rear end, and defroster 5 sets up at gas vent 4 top.
Two supporting pieces 12 are arranged and respectively located below the long edges at the two sides of the bottom end of the box body 1 and fixed with the box body 1. The support member 12 is in the form of an elongate rail.
The box body 1, the fluid inlet 2, the water outlet 3, the air outlet 4, the demister 5, the liquid level meter interface, the oil outlet 8, the clean discharge port 9, the upper baffle plate 10, the lower baffle plate 11 and the support piece 12 are all made of metal materials, and carbon steel is preferred.
The inner walls of the box body 1, the fluid inlet 2, the water outlet 3, the air outlet 4, the demister 5, the liquid level meter interface, the oil outlet 8 and the clean discharge port 9 are coated with anticorrosive coatings; the material of the anticorrosive coating adopts epoxy resin.
The outer surfaces of the box body 1, the fluid inlet 2, the water outlet 3, the air outlet 4, the demister 5, the liquid level meter interface, the oil outlet 8, the clean discharge port 9, the upper baffle plate 10, the lower baffle plate 11 and the support piece 12 are coated with antirust paint.
The method comprises the following specific processes: when the gas-liquid separation device needs to be used, the demister 5 is connected with a suction pump, the oil discharge port 8 is connected with an oil discharge pump, the water discharge port 3 is connected with a drainage pump, and the emptying port 9 is connected with a sludge discharge pump; a suction pump at the rear end of a demister 5 is started to pump underground polluted gas-liquid mixed fluid into a box body 1 through a fluid inlet 2, the fluid is collided and separated with an upper baffle plate 10 after entering the box body 1, the separated gas bypasses the upper baffle plate 10 and is further collided and separated with the liquid in the box body 1 and the liquid at the bottom, the gas is discharged into a gas phase treatment unit through a demister 5 through an upper gas outlet 4 in a gas-liquid separation method, and underground water, non-aqueous phase liquid (NAPL) and silt fall into the box body 1.
The lower baffle 11 arranged in the box body 1 mainly has two functions: intercepting heavy non-aqueous phase liquid (DNAPL) and silt to prevent the problems of blockage of subsequent pipelines and equipment by the DNAPL and the silt and the like; the second is to overflow the light non-aqueous liquid (LNAPL) and then to discharge the LNAPL from the oil drain 8 by means of an oil drain pump.
After the extraction system normally operates, the liquid level in the box body 1 of the gas-liquid separation method gradually rises, and when the liquid level at the front end of the lower baffle plate reaches a high liquid level, the liquid level meter of the second liquid level meter interface 7 arranged in front of the lower baffle plate 11 delays for a plurality of times through signal transmission and then the drainage pump is started. In the time of this time delay, because the liquid level in the tank body 1 is higher than the upper end of the lower baffle, the LNAPL phase floating on the liquid level will overflow to the tank body 1 at the rear end over the lower baffle, when the liquid level at the rear end reaches the high liquid level, the liquid level meter of the first liquid level meter interface 6 installed behind the lower baffle 11 starts the oil discharge pump through signal transmission, and the LNAPL layer and the groundwater with the LNAPL amount are discharged from the oil discharge port 8 of the tank body 1. After the delay time is over, the drain pump is automatically started to drain the polluted groundwater or the groundwater with a small quantity of LNAPL from the drain port 3. During the operation of the extraction system, when the amount of the silt at the bottom of the box body 1 is excessive, the dredge pump is manually started to discharge the silt-containing fluid from the emptying port 9.
The above operation is based on the situation that the extracted liquid phase contains LNAPL, and if the extracted liquid phase does not contain LNAPL, the operation is different from the above situation in that a time relay linked with a liquid level meter before the lower baffle plate 11 needs to be closed, and the function of delaying the pump starting is cancelled. When the liquid level at the front end of the lower baffle plate reaches a high liquid level, the liquid level meter of the second liquid level meter interface 7 arranged in front of the lower baffle plate 11 starts the drainage pump to drain water directly in a chain manner, and the space of the box body 1 behind the lower baffle plate 11 is not utilized.
The gas-liquid separation method for in-situ remediation of groundwater in contaminated soil provided by the invention is further described with reference to the following examples.
Example 1
A gas-liquid separation method for in-situ remediation of polluted soil and underground water is carried out by a gas-liquid separation device; this gas-liquid separation equipment includes box 1, fluid inlet 2, outlet 3, gas vent 4, defroster 5, first level gauge interface 6, second level gauge interface 7, oil drain port 8, put clean mouth 9, go up plate washer 10, lower plate washer 11 and support piece 12, the front end of box 1 is equipped with fluid inlet 2 and outlet 3, the top of box 1 is equipped with gas vent 4, defroster 5 and level gauge interface, the rear end of box 1 is equipped with oil drain port 8, the side of box 1 is equipped with puts clean mouth 9, the inside upper end of box 1 is equipped with the overhead gage, the inside lower extreme of box 1 is equipped with down the baffle, the bottom surface of box 1 is equipped with support piece 12.
The box body 1 is a rectangular box body, the rectangular box body enables the contact area of fluid and the box body 1 to be large, and vortex is easily formed in the box body 1, so that gas-liquid-solid separation is complete.
The box body 1, the fluid inlet 2, the water outlet 3, the air outlet 4, the demister 5, the first liquid level meter interface 6, the second liquid level meter interface 7, the oil outlet 8, the net discharging port 9, the upper baffle plate 10, the lower baffle plate 11 and the supporting piece 12 are all made of metal materials, and the metal materials guarantee the stability of the structure of the gas-liquid separation method.
The inner walls of the box body 1, the fluid inlet 2, the water outlet 3, the air exhaust port 4, the demister 5, the first liquid level meter interface 6, the second liquid level meter interface 7, the oil exhaust port 8 and the clean discharge port 9 are coated with anticorrosive coatings, the anticorrosive coatings are made of epoxy resin, the inner wall anticorrosive coatings can protect the inner wall of a gas-liquid separation method, and the service life of the box body 1 is prolonged.
The outer surfaces of the box body 1, the fluid inlet 2, the water outlet 3, the exhaust port 4, the demister 5, the first liquid level meter interface 6, the second liquid level meter interface 7, the oil discharge port 8, the clean discharge port 9, the upper baffle plate 10, the lower baffle plate 11 and the support piece 12 are coated with antirust paint, the antirust paint can protect the outer wall of a gas-liquid separation method, and the service life of the box body 1 is prolonged.
The support 12 is provided with 2, and 2 support 12 distribute in the long limit both sides of bottom of box 1. The 2 supports 12 support the tank 1 so that it does not directly touch the ground.
The method comprises the following specific processes: when the gas-liquid separation device needs to be used, the demister 5 is connected with a suction pump, the oil discharge port 8 is connected with an oil discharge pump, the water discharge port 3 is connected with a drainage pump, and the emptying port 9 is connected with a sludge discharge pump; a suction pump at the rear end of a demister 5 is started to pump underground polluted gas-liquid mixed fluid into a box body 1 through a fluid inlet 2, the fluid is collided and separated with an upper baffle plate 10 after entering the box body 1, the separated gas bypasses the upper baffle plate 10 and is further collided and separated with the liquid in the box body 1 and the liquid at the bottom, the gas is discharged into a gas phase treatment unit through a demister 5 through an upper gas outlet 4 in a gas-liquid separation method, and underground water, non-aqueous phase liquid (NAPL) and silt fall into the box body 1. The lower baffle 11 arranged in the box body 1 mainly has two functions: intercepting heavy non-aqueous phase liquid (DNAPL) and silt to prevent the problems of blockage of subsequent pipelines and equipment by the DNAPL and the silt and the like; the second is to overflow the light non-aqueous liquid (LNAPL) and then to discharge the LNAPL from the oil drain 8 by means of an oil drain pump. After the extraction system normally operates, the liquid level in the box body 1 of the gas-liquid separation method gradually rises, and when the liquid level at the front end of the lower baffle plate 11 reaches a high liquid level, the liquid level meter of the second liquid level meter interface 7 arranged in front of the lower baffle plate 11 delays for a plurality of times through signal transmission and then the drainage pump is started. In the time of this time delay, because the liquid level in the tank body 1 is higher than the upper end of the lower baffle 11, the LNAPL phase floating on the liquid level can cross the lower baffle 11 and overflow into the tank body 1 at the rear end, when the liquid level at the rear end reaches the high liquid level, the liquid level meter of the first liquid level meter interface 6 installed behind the lower baffle 11 starts the oil discharge pump through signal transmission, and the LNAPL layer and the groundwater with the LNAPL amount are discharged from the oil discharge port 8 of the tank body 1. After the delay time is over, the drain pump is automatically started to drain the polluted groundwater or the groundwater with a small quantity of LNAPL from the drain port 3. During the operation of the extraction system, when the amount of the silt at the bottom of the box body 1 is excessive, the dredge pump is manually started to discharge the silt-containing fluid from the emptying port 9.
The above operation is based on the situation that the extracted liquid phase contains LNAPL, and if the extracted liquid phase does not contain LNAPL, the operation is different from the above situation in that a time relay linked with a liquid level meter before the lower baffle plate 11 needs to be closed, and the function of delaying the pump starting is cancelled. When the liquid level at the front end of the lower baffle plate 11 reaches a high liquid level, the liquid level meter of the second liquid level meter interface 7 arranged in front of the lower baffle plate 11 is linked to start the drainage pump to directly drain water, and the space of the box body 1 behind the lower baffle plate 11 is not utilized.
The invention provides a gas-liquid separation method for in-situ remediation of polluted soil and underground water, which is a ground gas-liquid separation method required by in-situ remediation technologies such as in-situ multiphase extraction remediation, in-situ thermal desorption remediation and the like for the polluted soil and/or the underground water, can overcome the defects of the gas-liquid separation method in the application of the existing remediation engineering, has the advantages of simple structure, good stability and high gas-liquid separation efficiency, has an oil-water separation function, and can be generally and effectively applied to the in-situ remediation construction process of soil and underground water polluted land blocks.
While the present invention has been described in detail with reference to the preferred embodiments, it should be understood that the above description should not be taken as limiting the invention. Various modifications and alterations to this invention will become apparent to those skilled in the art upon reading the foregoing description. Accordingly, the scope of the invention should be determined from the following claims.
Claims (10)
1. A gas-liquid separation method for in-situ remediation of polluted soil and underground water is characterized in that the method is carried out by a gas-liquid separation device; the gas-liquid separation device comprises a box body, and a fluid inlet, a water outlet, an exhaust port, a demister, a liquid level meter interface, an oil outlet, a clean discharge port, an upper baffle plate, a lower baffle plate and a support piece which are arranged on the box body;
the box body is a cuboid with a hollow interior; the fluid inlet is arranged at the upper part of the end face of the front end of the box body, the water outlet is arranged at the lower part of the end face of the same end, and the oil outlet is arranged at the lower part of the end face of the rear end of the box body; the gas vent, the demister and the liquid level meter interface are arranged at the top end of the box body, the emptying port is arranged on the side face of the box body, the upper baffle is arranged above the inside of the box body, the lower baffle is arranged below the inside of the box body, and the supporting piece is arranged on the bottom face of the box body.
2. The gas-liquid separation method for in-situ remediation of contaminated soil groundwater according to claim 1, wherein the upper baffle is vertically disposed inside the tank from a top surface of the tank downward, and the lower baffle is vertically disposed inside the tank from a bottom surface of the tank upward.
3. The gas-liquid separation method for in-situ remediation of polluted soil groundwater as claimed in claim 2, wherein the upper baffle and the lower baffle are arranged at positions that equally divide the tank body into three parts along the length direction, the upper baffle is close to the front end of the tank body, and the lower baffle is close to the rear end of the tank body.
4. The gas-liquid separation method for in-situ remediation of polluted soil groundwater according to claim 1, wherein the two liquid level meter interfaces are a first liquid level meter interface arranged behind the lower baffle plate and a second liquid level meter interface arranged in front of the lower baffle plate; the first liquid level meter interface is arranged at an exhaust port at the top end of the box body, and the second liquid level meter interface is arranged at the middle section at the top end of the box body.
5. The gas-liquid separation method for in-situ remediation of polluted soil groundwater according to claim 4, wherein the exhaust port is arranged at a position close to the rear end of the tank body, and the demister is arranged at the top of the exhaust port.
6. The gas-liquid separation method for in-situ remediation of contaminated soil and groundwater as claimed in claim 1, wherein two of the support members are respectively located below the long sides of the bottom end of the tank body and fixed to the tank body.
7. The gas-liquid separation method for in-situ remediation of polluted soil groundwater as claimed in claim 1, wherein the tank, the fluid inlet, the water outlet, the air outlet, the demister, the liquid level meter interface, the oil outlet, the clean discharge port, the upper baffle, the lower baffle and the support are made of metal materials.
8. The gas-liquid separation method for in-situ remediation of polluted soil groundwater as claimed in claim 1, wherein the inner walls of the tank body, the fluid inlet, the water outlet, the air outlet, the demister, the liquid level meter interface, the oil outlet and the clean-out opening are coated with an anticorrosive coating; the material of the anticorrosive coating adopts epoxy resin.
9. The gas-liquid separation method for in-situ remediation of polluted soil groundwater as claimed in claim 1, wherein the outer surfaces of the box body, the fluid inlet, the water outlet, the air outlet, the demister, the liquid level meter interface, the oil outlet, the clean discharge port, the upper baffle, the lower baffle and the support are coated with anti-rust paint.
10. The gas-liquid separation method for in-situ remediation of polluted soil groundwater according to any one of claims 1 to 9, wherein the method comprises the following steps: when the gas-liquid separation device is used, the demister is connected with the suction pump, the oil discharge port is connected with the oil discharge pump, the water discharge port is connected with the drainage pump, and the emptying port is connected with the sludge discharge pump; starting a suction pump to pump the gas-liquid mixed fluid with underground pollution into the box body through a fluid inlet, enabling the fluid to collide and separate with the upper baffle after entering the box body, enabling the separated gas to bypass the upper baffle to further collide with the liquid in the box body and the liquid at the bottom, then discharging the gas together through a demister through an exhaust port above the method, and enabling underground water, non-aqueous phase liquid and silt to fall into the box body; the lower baffle in the box body intercepts heavy non-aqueous phase liquid and silt, overflows the light non-aqueous phase liquid and is discharged from an oil discharge port through an oil discharge pump; after the extraction system normally operates, the liquid level in the box body of the gas-liquid separation method gradually rises, when the liquid level at the front end of the lower baffle plate reaches a high liquid level, a liquid level meter of a second liquid level meter interface arranged at the front end of the lower baffle plate delays through signal transmission and then starts a drainage pump, in the delay time, the liquid level in the box body is higher than the upper end of the lower baffle plate, a light non-aqueous phase liquid phase floating on the liquid level crosses the lower baffle plate and overflows into the box body at the rear end, when the liquid level at the rear end reaches the high liquid level, a liquid level meter of a first liquid level meter interface arranged at the rear end of the lower baffle plate starts an oil drainage pump through signal transmission, and a light non-aqueous phase liquid layer and underground water containing high light non-aqueous phase; after the delay time is over, the draining pump is automatically started to drain the polluted underground water or the underground water containing a small amount of light non-aqueous phase liquid from the draining port; during operation, when the silt amount at the bottom of the box body is accumulated excessively, the mud pump is manually started to discharge the silt-containing fluid from the emptying port.
Priority Applications (1)
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