CN212264148U

CN212264148U - Soil and underground water remediation system combining multiphase extraction and biological methods

Info

Publication number: CN212264148U
Application number: CN202020585227.8U
Authority: CN
Inventors: 陈永军; 徐敏; 陈有伟; 姜勇
Original assignee: Nanjing Berkeley Environmental Restoration Co ltd
Current assignee: Nanjing Berkeley Environmental Restoration Co ltd
Priority date: 2020-04-17
Filing date: 2020-04-17
Publication date: 2021-01-01
Anticipated expiration: 2030-04-17

Abstract

The utility model discloses a soil and groundwater remediation system that heterogeneous extraction and biological method unite, relate to a contaminated site and restore technical field, including extraction system, heterogeneous piece-rate system, pollutant processing system and injection system, soil and the pollutant in the groundwater get into piece-rate system under extraction system effect, piece-rate system carries out heterogeneous separation, get into pollutant processing system and handle, simultaneously, the liquid flow of injection system is through the pump system, utilize the heat of pump machine to heat on the one hand, on the other hand cools off the pump machine, the fluid through heating pours into the well into and pours into the underground medium into, provide heat source and restoration medicament for the underground environment, can handle heterogeneous pollutant of attitude simultaneously through heterogeneous extraction system, realize the restoration of oil in soil and groundwater, water, gas, utilize the heat that the motor produced when operation to heat the injection fluid simultaneously, meanwhile, the passing fluid can cool the motor, so that the energy is saved, the environment is protected, and the service life of the extraction pump is prolonged.

Description

Soil and underground water remediation system combining multiphase extraction and biological methods

Technical Field

The utility model relates to a pollute place restoration technical field, specifically be a soil and groundwater repair system that heterogeneous extraction and biological method unite.

Background

With the rapid development of economy, the use of large quantities of chemicals has caused soil and groundwater to be contaminated to varying degrees. And due to the leaching of rainwater and the fluctuation of underground water level, the cross contamination of soil and underground water can be caused. In general, typical contaminants in soil and groundwater are inorganic and organic contaminants including Pb, Cr, As, benzenes, petroleum hydrocarbons, polychlorinated biphenyls, pesticides, and the like. These contaminants tend to be highly toxic and carcinogenic, and so these contaminated soils and groundwater must be remediated by reasonable technological means.

Pollutants in soil and underground water often exist in a free phase, a dissolved phase and a gas phase, a single restoration technology is difficult to adapt to the requirements of restoration of pollution in various phases, and the combination of various technologies becomes an indispensable method. The multiphase extraction technology simultaneously extracts pollutants in an underground pollution area, including gas-phase volatile substances in an unsaturated zone, free phase pollutants and dissolved phase pollutants in underground water and the like, by using vacuum extraction and other means, and performs phase separation and treatment on the ground to control and repair the pollution of soil and underground water.

The multiphase extraction technology generally consists of 3 process parts, namely multiphase extraction, multiphase separation and pollutant treatment. The multiphase extraction equipment can be generally divided into a single pump system and a double pump system, and is powered by vacuum equipment and/or a water pump to simultaneously extract gas and liquid (including soil gas, underground water and NAPL) in a polluted area, pump gaseous, water-soluble and water-insoluble liquid pollutants from underground to a treatment system on the ground, and then perform multiphase separation and treatment.

The multiphase extraction technology is used as an effective polluted site repairing technology and is suitable for sites with high underground medium permeability. While higher subsurface temperatures affect the vapor pressure of the gas, which also increases the rate of removal of volatile contaminants. Therefore, in the process of applying the multiphase extraction technology, a certain technical means is applied to increase the temperature of the underground medium in the target area, so that the method is an effective auxiliary means.

However, due to the adsorption of the underground media, a portion of the contaminants may remain in the ground after they are removed in bulk, creating a tailing phenomenon. In this case, the multi-phase extraction technique is difficult to be advantageous for removing contaminants at low concentrations. Generally, the microbial remediation technology can be used for assisting in degrading pollutants, removing pollutants with low concentration and achieving the final remediation goal. Meanwhile, the heating technology used for increasing the pollutant removal rate in the application process of the multiphase extraction technology is also beneficial to increasing the microbial activity and more thoroughly repairing the site pollution. Therefore, the heat treatment technology is used for increasing the temperature of the underground environment, and the multiphase extraction technology is combined with the bioremediation technology, so that the comprehensive restoration technology is an ideal comprehensive restoration technology.

In China, an attempt to enhance the multiphase extraction effect by heating an underground medium by using a metal rod [ CN104959373A ]. The method adds a heating device, additionally provides a heat source for an underground medium, realizes the biological ventilation effect through the well pipe design, and more thoroughly repairs the site pollution, but the above patents do not well utilize the heat generated by the devices such as a vacuum pump and the like, and are not an energy-saving, efficient and cheap repairing process.

Disclosure of Invention

Aiming at the problems in the prior art, the utility model aims to provide a soil and groundwater remediation system combining multiphase extraction and biological methods, which improves the in-situ remediation effect.

In order to achieve the above object, the utility model provides a following technical scheme: including extracting system, heterogeneous piece-rate system, pollutant processing system and injection system, soil and the pollutant in the groundwater get into piece-rate system under extracting the system effect, piece-rate system carries out heterogeneous separation, gets into pollutant processing system and handles, and simultaneously, injection system's liquid stream pump system, utilizes the heat of pump machine to heat on the one hand, and on the other hand cools off the pump machine, and the fluid through the heating injects the underground medium through the injection well, provides heat source and restoration medicament for the underground environment.

The extraction system comprises an extraction well, a check valve, an extraction main pipe, a pressure gauge and an extraction pump, wherein a water level gauge is arranged in the extraction well, the extraction main pipe is a PVC hose, one end of the extraction main pipe is connected with the wellhead of the extraction well, the other end of the extraction main pipe is connected with a liquid inlet of the extraction pump, the extraction pump is a vacuum pump, and a liquid outlet of the extraction pump is connected with the separation system through a pipeline.

Heterogeneous piece-rate system includes the three-phase separator, the entry end of three-phase separator passes through the pipeline and links to each other with the liquid outlet of extraction pump, simultaneously pollutant processing system includes exhaust treatment device, effluent treatment plant and waste oil treatment device, wherein the gas vent of three-phase separator links to each other with pollutant processing system's exhaust treatment device, and exhaust treatment device's air inlet end fixed mounting has the pressure control valve, simultaneously three-phase separator's outlet links to each other with pollutant processing system's effluent treatment plant, same effluent treatment device's inlet end fixed mounting has liquid level control valve one, simultaneously three-phase separator's oil drain port links to each other with pollutant processing system's waste oil treatment device, same waste oil treatment device's inlet end fixed mounting has liquid level control valve two.

The injection system comprises a medicament tank and an injection pump, wherein an outlet of the medicament tank is connected with an inlet of the injection pump, an outlet of the injection pump is connected with a medicament inlet of the extraction pump, and a medicament outlet of the extraction pump enters the injection pipe through the injection main pipe.

As a further aspect of the present invention: the extraction pump consists of a motor main body, a pump shell, a bearing, a blade, a support frame, a medicament pipe, a connecting hole, a converging cavity, a liquid discharge hole, a one-way valve and a shell, wherein the motor main body is respectively connected with the shell, the pump shell and the bearing, the pump shell is internally provided with a closed pump body which is only connected with the liquid inlet and the liquid outlet, an output shaft of a motor in the motor main body is connected with a rotating shaft through a coupling, the rotating shaft is fixedly arranged in the pump shell through the bearing, meanwhile, the bottom of the rotating shaft is fixedly provided with a blade which is positioned above the liquid inlet, a liquid discharging hole is arranged below the liquid inlet, a one-way valve is arranged in front of the liquid outlet, a converging cavity is formed between the shell and the pump shell, the casing is provided with a connecting hole and a medicament outlet, the outer side of the motor main body is wound with a circle of medicament pipe, the medicament pipe is fixedly connected with the confluence cavity through the connecting hole, and the bottom of the extraction pump is fixedly provided with a support frame.

As a further aspect of the present invention: the lateral wall of medicament jar passes through connecting block fixed mounting on the lateral wall of stand, stand fixed mounting is subaerial at work, fixed mounting has the rotating electrical machines on the lateral wall that the stand is close to the medicament jar simultaneously, the below of rotating electrical machines displacement connecting block, simultaneously through shaft coupling fixedly connected with pivot on the output shaft of rotating electrical machines, the inside of medicament jar is stretched into in the pivot, and the junction of pivot and medicament jar passes through the sealing plug and guarantees sealedly, the connecting rod is installed perpendicularly to the intermediate position of pivot simultaneously, the arc is installed to the both ends symmetry of connecting rod, the radian of arc and the arc of medicament tank bottoms portion correspond each other.

As a further aspect of the present invention: the bottom of the arc-shaped plate is fixedly provided with a plurality of elastic lugs, and the elastic lugs are in sliding contact with the bottom surface of the medicament tank.

As a further aspect of the present invention: a pair of stirring rods is fixedly mounted on the rotating shaft and is symmetrical to each other about the connecting rod.

As a further aspect of the present invention: the liquid inlet department of medicament jar is connected with into the liquid fill, and fixed mounting has the solenoid valve on the liquid outlet of simultaneously advancing the liquid fill and the liquid outlet of medicament jar, and the top fixed mounting of medicament jar has the level gauge simultaneously.

As a further aspect of the present invention: the utility model discloses a liquid injection device, including injection pipe, cylinder, baffle sliding mounting, the through-hole that sets up of a plurality of levels was seted up to the through-hole on the telescopic link of cylinder, the through-hole that sets up of a plurality of levels was seted up to the top fixed mounting of cavity on the lateral wall of injection pipe, fixedly connected with baffle on the telescopic link of cylinder, baffle sliding mounting in the inside of cavity on the baffle simultaneously, and.

As a further aspect of the present invention: the waste gas treatment device is an active carbon treatment tank, and after the gas passes through the pressure control valve and enters the active carbon adsorption tank for treatment, the gas is discharged after reaching the standard after detection.

As a further aspect of the present invention: the injection inlet of the injection main pipe is a shunt and is connected to the pipe orifices of the plurality of injection pipes, and the pipe orifice of each injection pipe is provided with a pressure gauge.

As a further aspect of the present invention: the outer sleeve of the extraction well is a screened PVC pipe or a steel pipe.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the utility model is provided with a multiphase separation system, and can simultaneously treat pollutants in multiphase states through a multiphase extraction system, thereby realizing the remediation of oil, water and gas in soil and underground water;

2. the utility model is provided with the extraction pump, the outer side of the motor body of the extraction pump is wound with a circle of medicament pipe, the heat generated when the motor operates is utilized to heat the injected fluid, and meanwhile, the passing fluid can cool the motor, thereby being more energy-saving and environment-friendly, and simultaneously prolonging the service life of the extraction pump;

3. the utility model is provided with an injection system, can be used for treating the pollution of soil and underground water with different degrees, and can carry out remediation by a multi-phase extraction and microbial agent injection mode when treating low-concentration pollutants; when floating oil or high-concentration petroleum hydrocarbon exists, the treatment can be carried out through multiphase extraction and hot steam injection technologies, the treatment mode is more abundant, and the practicability of the system is improved.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic diagram of the structure of the extraction pump of the present invention.

Fig. 3 is a schematic structural view of the medicament canister of the present invention.

Fig. 4 is a schematic diagram of the structure of the injection pipe according to the present invention.

As shown in the figure: 1. the device comprises an extraction well, 101, a water level meter, 2, an injection pipe, 201, a cavity, 202, a cylinder, 203, a baffle, 204, a through hole, 3, a check valve, 4, an extraction main pipe, 5, a pressure gauge, 6, a liquid inlet, 7, an extraction pump, 701, a motor main body, 702, a pump shell, 703, a bearing, 704, a blade, 705, a support frame, 706, a medicament pipe, 707, a connecting hole, 708, a converging cavity, 709, a liquid discharging hole, 710, a check valve, 711, a shell, 8, a liquid outlet, 9, a three-phase separator, 10, a pressure control valve, 11, a waste gas treatment device, 12, a liquid level control valve I, 13, a waste water treatment device, 14, a liquid level control valve II, 15, a waste oil treatment device, 16, a medicament tank, 17, an injection pump, 18, a medicament inlet, 19, a medicament outlet, 20, an injection main pipe, 21, a stand column, 22, a liquid inlet hopper, 23, a, Connecting rod, 26, arc plate, 27, puddler, 28, elasticity lug, 29, liquid outlet, 30, solenoid valve, 31, level gauge.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted", "provided", "sleeved/connected", "connected", and the like are to be understood in a broad sense, such as "connected", which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Please refer to fig. 1-4, in an embodiment of the present invention, a soil and groundwater remediation system combining multiphase extraction and biological method, includes extraction system, multiphase separation system, pollutant treatment system and injection system, the pollutant in soil and groundwater gets into the separation system under the action of the extraction system, the separation system performs multiphase separation, gets into the pollutant treatment system to handle, and simultaneously, the liquid flow of the injection system heats through the heat of the pump machine on the one hand, and cools the pump machine on the other hand, and the fluid through heating injects underground medium through the injection well, provides heat source and remediation agent for the underground environment.

Referring to fig. 1, it can be seen that: wherein, the extraction system includes extraction well 1, check valve 3, extraction house steward 4, manometer 5 and extraction pump 7, wherein 1 outer tube of extraction well is the PVC pipe or the steel pipe of opening the sieve, is provided with fluviograph 101 in the extraction well 1, and extraction house steward 4 is the PVC material hose simultaneously, and one end links to each other with 1 well head of extraction well, and the other end links to each other with inlet 6 of extraction pump 7, and extraction pump 7 is the vacuum pump simultaneously for draw liquid and or air exhaust provide power, and the liquid outlet and the piece-rate system of extraction pump 7 pass through the tube coupling.

Referring to fig. 2, it can be seen that: the extraction pump 7 is composed of a motor body 701, a pump case 702, a bearing 703, a blade 704, a support frame 705, a medicament tube 706, a connecting hole 707, a confluence cavity 708, a liquid discharge hole 709, a one-way valve 710 and a shell 711, wherein the motor body 701 is respectively connected with the shell 711, the pump case 702 and the bearing 703, the pump case 702 is internally provided with a closed pump body which is only connected with a liquid inlet 6 and a liquid outlet 8, an output shaft of a motor in the motor body 701 is connected with a rotating shaft through a coupler, the rotating shaft is fixedly arranged in the pump case 702 through the bearing 703, the bottom of the rotating shaft is fixedly provided with the blade 704 which is positioned above the liquid inlet 6 and is used for extracting polluted liquid, the liquid discharge hole 709 is arranged below the liquid inlet 6, the one-way valve 710 is arranged in front of the liquid outlet 8, the confluence cavity 708 is formed between the shell 711 and the pump case 702, the shell 711 is provided with the connecting, the medicament tube 706 is fixedly connected with the confluence chamber 708 through a connecting hole 707, and the bottom of the extraction pump 7 is fixedly provided with a support 705, and the extraction pump 705 is fixedly arranged on the working ground through the support 705.

Referring to fig. 1, it can be seen that: the multi-phase separation system comprises a three-phase separator 9, the inlet end of the three-phase separator 9 is connected with a liquid outlet 8 of the extraction pump 7 through a pipeline, and pollutants discharged from the extraction system are separated through the three-phase separator 9, so that effective separation of gas, oil and water is realized, and the pollutant treatment system can conveniently perform classification treatment; the pollutant treatment system comprises a waste gas treatment device 11, a waste water treatment device 13 and a waste oil treatment device 15, wherein an exhaust port of a three-phase separator 9 is connected with the waste gas treatment device 11 of the pollutant treatment system, a pressure control valve 10 is fixedly installed at an air inlet end of the waste gas treatment device 11, the waste gas treatment device 11 is an active carbon treatment tank, gas enters the active carbon adsorption tank after passing through the pressure control valve 10 and is treated, air is discharged after the gas reaches the standard after detection, meanwhile, a water outlet of the three-phase separator 9 is connected with the waste water treatment device 13 of the pollutant treatment system, a liquid level control valve 12 is fixedly installed at a liquid inlet end of the same waste water treatment device 13, waste water enters a liquid storage tank after passing through the liquid level control valve 12 and being filtered, the liquid active carbon adsorption tank enters the liquid storage tank, water in the liquid storage tank is discharged into a municipal pipe network after being subjected to subsequent water treatment, and an oil discharge port, a second liquid level control valve 14 is fixedly mounted at the oil inlet end of the same waste oil treatment device 15, and waste oil enters the waste oil recovery device after passing through the second liquid level control valve 14.

Referring to fig. 1 and 3, it can be seen that: the injection system comprises a medicament tank 16 and an injection pump 17, wherein an outlet of the medicament tank 16 is connected with an inlet of the injection pump 17, an outlet of the injection pump 17 is connected with a medicament inlet 18 of an extraction pump 7, medicaments pass through a medicament pipe 706 and a confluence cavity 708 inside the extraction pump, absorb heat of the extraction pump and then enter the injection pipes 2 from a medicament outlet 19 through an injection main pipe 20, an injection port of the injection main pipe 20 is a shunt and is connected to pipe orifices of the injection pipes 2, and a pressure gauge is arranged at a pipe orifice of each injection pipe.

Wherein, the lateral wall of the medicament tank 16 is fixedly arranged on the lateral wall of the upright post 21 through a connecting block, the upright post 21 is fixedly arranged on the working ground, meanwhile, the upright post 21 is fixedly arranged on the lateral wall close to the medicament tank 16 and is fixedly provided with a rotating motor 23, the rotating motor 23 displaces the lower part of the connecting block, meanwhile, an output shaft of the rotating motor 23 is fixedly connected with a rotating shaft 24 through a coupler, the rotating shaft 24 extends into the medicament tank 16, the joint of the rotating shaft 24 and the medicament tank 16 is sealed through a sealing plug, meanwhile, the middle position of the rotating shaft 24 is vertically provided with a connecting rod 25, two ends of the connecting rod 25 are symmetrically provided with arc-shaped plates 26, the radian of the arc-shaped plates 26 corresponds to the arc shape at the bottom of the medicament tank 16, the bottom of the arc-shaped plates 26 is fixedly provided with a plurality of elastic lugs 28, the elastic lugs, puddler 27 is about the mutual symmetry of connecting rod 25, it rotates to drive the pivot through rotating electrical machines 23, thereby drive arc 26 and puddler 27 and rotate, stir chemical liquid medicine, avoid the chemical composition of the inside to pile up in the bottom of medicament jar 16, simultaneously the inlet port department of medicament jar 16 is connected with into liquid fill 22, the supplementary chemical liquid medicine of operating personnel has been made things convenient for, fixed mounting has solenoid valve 30 on the liquid outlet of simultaneously entering liquid fill 22 and the liquid outlet of medicament jar 16, simultaneously the top fixed mounting of medicament jar 16 has level gauge 31, the convenience is highly observed the inside liquid level of medicament jar 16.

Preferably, a cavity 201 is formed on the side wall of the injection pipe 2, an air cylinder 202 is fixedly installed at the top of the cavity 201, a baffle 203 is fixedly connected to an expansion link of the air cylinder 202, the baffle 203 is slidably installed inside the cavity 201, meanwhile, a plurality of through holes 204 which are horizontally arranged are arranged on the baffle 203, liquid outlet holes are correspondingly arranged on the side walls of the two ends of the cavity 201, when the telescopic rod of the cylinder 202 is in the extended position, the through hole 204 and the liquid outlet hole are communicated with each other to perform liquid discharge operation, when the telescopic rod of the cylinder 202 is in the contraction position, the through hole 204 and the liquid outlet hole are staggered, the baffle plate 203 shields the liquid outlet hole, thereby effectively preventing pollutants in the soil from entering the injection pipe 2 when the device does not work and influencing the working efficiency of the injection pipe 2, meanwhile, the liquid outlet hole on the outer side wall of the cavity 201 is provided with a screen, so that the pollutants can be further prevented from flowing back into the injection pipe 2.

According to the utility model provides an above-mentioned preferred embodiment, extraction pump 7 is the vacuum pump, its normal during operation motor 701 and the pump body can generate heat, through the medicament pipe 706 on motor 701 surface and the outside chamber 708 that converges of the pump body of twining, under the condition of medicament fluid process, can take away the heat that produces, for the pump cooling, reduce the loss of pump, the life of extension pump, and simultaneously, the medicament of the pump body of flowing through is heated, fluid injection through the heating is to pouring into the ground end after, improve microbial activity and biodegradable efficiency, also accelerate the desorption of pollutant from underground medium, the restoration process velocity that has increased.

It should be noted that the working principle and the installation mode of the three-phase separator 9 both adopt the prior art, and are common knowledge of those skilled in the art, and thus no further description is provided herein.

According to the utility model provides an above-mentioned preferred embodiment, the utility model discloses a concrete working method as follows:

firstly, an extraction pump 7 is started to provide power, negative pressure is formed in an extraction well 1, so that gas in a gas-coated zone and underground water in a saturated zone enter a pump body from a liquid inlet 6 through an extraction main pipe 4 through the extraction well 1, then enter a multiphase separator through a liquid outlet 8, a mixed fluid containing oil, gas and water is separated, the separated gas enters a waste gas treatment device 11 for treatment and is discharged after reaching the standard, the separated water enters a waste water treatment device 13 for treatment such as adsorption and the like, the separated water is discharged into a municipal pipe network after reaching the standard, and the separated oil enters a waste oil recovery device after being treated by a waste oil treatment device 15;

then, the injection pump 17 is started, the drug inlet 18 is opened, the needed drugs, such as chemical drugs, biological drugs, air, nutrient sources and the like, are selectively added into the drug storage tank 16 according to needs, the injected drugs enter the converging cavity 708 from the connecting hole 707 through the drug tube 706 to absorb heat emitted during the operation of the pump body, then enter the injection tube 2 from the drug outlet 19 through the injection main tube 20 buried underground, and the heated fluid enters the underground medium, so that the circulation of the underground fluid is increased, and the biodegradation efficiency of pollutants is also improved.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention, and the following claims are therefore to be read in this light of the appended claims.

Claims

1. A soil and groundwater remediation system combining a multiphase extraction and biological method comprises an extraction system, a multiphase separation system, a pollutant treatment system and an injection system, and is characterized in that: the pollutants in the soil and the underground water enter a separation system under the action of an extraction system, the separation system performs multiphase separation and enters a pollutant treatment system for treatment, meanwhile, liquid flowing into the system flows through a pump system, and heated fluid is injected into an underground medium through an injection well to provide a heat source and a repairing agent for the underground environment;

the extraction system comprises an extraction well (1), a check valve (3), an extraction main pipe (4), a pressure gauge (5) and an extraction pump (7), wherein a water level gauge (101) is arranged in the extraction well (1), the extraction main pipe (4) is a PVC hose, one end of the extraction main pipe is connected with a well head of the extraction well (1), the other end of the extraction main pipe is connected with a liquid inlet (6) of the extraction pump (7), the extraction pump (7) is a vacuum pump, and a liquid outlet of the extraction pump (7) is connected with the separation system through a pipeline;

the multiphase separation system comprises a three-phase separator (9), the inlet end of the three-phase separator (9) is connected with a liquid outlet (8) of an extraction pump (7) through a pipeline, meanwhile, the pollutant treatment system comprises a waste gas treatment device (11), a waste water treatment device (13) and a waste oil treatment device (15), wherein the exhaust port of the three-phase separator (9) is connected with the waste gas treatment device (11) of the pollutant treatment system, a pressure control valve (10) is fixedly installed at the air inlet end of the waste gas treatment device (11), the water outlet of the three-phase separator (9) is connected with the waste water treatment device (13) of the pollutant treatment system, a liquid level control valve I (12) is fixedly installed at the air inlet end of the same waste water treatment device (13), and the oil outlet of the three-phase separator (9) is connected with the waste oil treatment device (15) of the pollutant, a second liquid level control valve (14) is fixedly arranged at the oil inlet end of the same waste oil treatment device (15);

the injection system comprises a medicament tank (16) and an injection pump (17), wherein an outlet of the medicament tank (16) is connected with an inlet of the injection pump (17), an outlet of the injection pump (17) is connected with a medicament inlet (18) of the extraction pump (7), and a medicament outlet (19) of the extraction pump enters the injection pipe (2) through an injection main pipe (20).

2. The multiphase extraction and biological process combined soil and groundwater remediation system of claim 1, wherein: the extraction pump (7) consists of a motor main body (701), a pump shell (702), a bearing (703), a blade (704), a support frame (705), a medicament tube (706), a connecting hole (707), a converging cavity (708), a liquid discharging hole (709), a one-way valve (710) and a shell (711), wherein the motor main body (701) is respectively connected with the shell (711), the pump shell (702) and the bearing (703), the pump shell (702) is internally provided with a closed pump body which is only connected with a liquid inlet (6) and a liquid outlet (8), an output shaft of a motor in the motor main body (701) is connected with a rotating shaft through a coupling, the rotating shaft is fixedly arranged in the pump shell (702) through the bearing (703), the blade (704) is fixedly arranged at the bottom of the rotating shaft and is positioned above the liquid inlet (6), the liquid discharging hole (709) is arranged below the liquid inlet (6), the one-way valve (710), meanwhile, a confluence cavity (708) is formed between the outer shell (711) and the pump shell (702), a connecting hole (707) and a medicament outlet (19) are formed in the outer shell (711), a circle of medicament tube (706) is wound on the outer side of the motor main body (701), the medicament tube (706) is fixedly connected with the confluence cavity (708) through the connecting hole (707), and a support frame (705) is fixedly installed at the bottom of the extraction pump (7).

3. A multiphase extraction and biological process combined soil and groundwater remediation system as claimed in claim 1 or claim 2, wherein: the lateral wall of medicament jar (16) passes through connecting block fixed mounting on the lateral wall of stand (21), stand (21) fixed mounting is subaerial at work, simultaneously stand (21) be close to on the lateral wall of medicament jar (16) fixed mounting have rotating electrical machines (23), the below of rotating electrical machines (23) displacement connecting block, simultaneously through shaft coupling fixedly connected with pivot (24) on the output shaft of rotating electrical machines (23), pivot (24) stretch into the inside of medicament jar (16), and the junction of pivot (24) and medicament jar (16) is guaranteed sealedly through the sealing plug, connecting rod (25) are installed perpendicularly to the intermediate position of pivot (24) simultaneously, arc (26) are installed to the both ends symmetry of connecting rod (25), the radian of arc (26) and the arc of medicament jar (16) bottom correspond each other.

4. A multi-phase extraction and biological combined soil and groundwater remediation system as claimed in claim 3, wherein: the bottom of the arc-shaped plate (26) is fixedly provided with a plurality of elastic lugs (28), and the elastic lugs (28) are in sliding contact with the bottom surface of the medicament tank (16).

5. A multi-phase extraction and biological combined soil and groundwater remediation system as claimed in claim 3, wherein: a pair of stirring rods (27) is fixedly mounted on the rotating shaft (24), and the stirring rods (27) are symmetrical with each other about the connecting rod (25).

6. A multi-phase extraction and biological combined soil and groundwater remediation system as claimed in claim 3, wherein: the liquid inlet department of medicament jar (16) is connected with into liquid fill (22), and fixed mounting has solenoid valve (30) on the liquid outlet of simultaneously advancing liquid fill (22) and the liquid outlet of medicament jar (16), and the top fixed mounting of simultaneously medicament jar (16) has level gauge (31).

7. A multiphase extraction and biological process combined soil and groundwater remediation system as claimed in claim 1 or claim 2, wherein: seted up cavity (201) on the lateral wall of injection pipe (2), the top fixed mounting of cavity (201) has cylinder (202), fixedly connected with baffle (203) on the telescopic link of cylinder (202), and baffle (203) slidable mounting is in the inside of cavity (201), sets up through-hole (204) that a plurality of levels set up on baffle (203) simultaneously, and liquid outlet hole has been seted up in the correspondence on the both ends lateral wall of cavity (201) simultaneously.

8. A multiphase extraction and biological process combined soil and groundwater remediation system as claimed in claim 1 or claim 2, wherein: the waste gas treatment device (11) is an activated carbon treatment tank.

9. A multiphase extraction and biological process combined soil and groundwater remediation system as claimed in claim 1 or claim 2, wherein: the injection inlet of the injection main pipe (20) is a shunt and is connected to the pipe orifices of the plurality of injection pipes (2), and the pipe orifice of each injection pipe is provided with a pressure gauge.

10. A multiphase extraction and biological process combined soil and groundwater remediation system as claimed in claim 1 or claim 2, wherein: the outer sleeve of the extraction well (1) is a screened PVC pipe or a steel pipe.