Contaminated soil remediation system based on vapor extraction and biological pile coupling

Abstract

The invention discloses a contaminated soil remediation system based on vapor extraction and biological pile coupling. The contaminated soil remediation system comprises a vehicle-mounted supporting mechanism, a vapor extraction mechanism connected to the vehicle-mounted supporting mechanism and a biological pile treatment mechanism used in cooperation with the vapor extraction mechanism. The vehicle-mounted supporting mechanism comprises a vehicle-mounted supporting chassis, and a plurality of crawler-type driving wheel sets are fixedly installed at the bottom of the vehicle-mounted supporting chassis. The top of the vehicle-mounted supporting chassis is rotationally connected with a gas phase extraction supporting plate which is horizontally arranged; the gas-phase extraction mechanism comprises a plurality of gas-phase extraction units which are connected to the top of the gas-phase extraction supporting plate through supporting arm mechanisms; the device has the efficient remediation capacity, the multiple gas phase extraction units work at the same time, volatile organic pollutants in soil can be sucked out more thoroughly within a certain range, and the volatile organic pollutants adsorbed to the deep layer of the soil can be sucked out through the impact extraction mechanism; and the volatile organic pollutants can be removed more thoroughly.

Description

Technical Field

[0001] The invention relates to the technical field of soil regeneration, and in particular to a contaminated soil remediation system based on gas phase extraction and biopile coupling. Background Art

[0002] Soil Vapor Extraction (SVE) is mainly used to remove volatile organic pollutants from soil. Volatile organic pollutants in contaminated soil have a tendency to change from liquid or solid to gas under certain temperature and pressure conditions. The vapor phase extraction technology sets extraction wells in the soil and uses a vacuum pump or other vacuum equipment to generate negative pressure. Under the action of negative pressure, the air in the soil pores is extracted, which causes the pollutants to evaporate from the surface of the soil particles into the gas phase. For example, in petroleum-contaminated soil, light hydrocarbon pollutants such as benzene and toluene are highly volatile and easily evaporate from the soil when negative pressure is generated in the extraction well;

[0003] The current gas phase extraction equipment still has shortcomings in extraction efficiency and further purification of contaminated soil. The removal rate of volatile organic pollutants in the soil is still relatively low and needs further improvement and optimization. Summary of the invention

[0004] The purpose of the present invention is to provide a contaminated soil remediation system based on gas phase extraction and biopile coupling, which can more thoroughly remove volatile organic pollutants in the soil.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A contaminated soil remediation system based on gas phase extraction and biopile coupling, comprising a vehicle-mounted support mechanism, a gas phase extraction mechanism connected to the vehicle-mounted support mechanism, and a biopile treatment mechanism used in conjunction with the gas phase extraction mechanism;

[0007] The vehicle-mounted support mechanism includes a vehicle-mounted support chassis, and a plurality of crawler-type drive wheel sets are fixedly installed at the bottom of the vehicle-mounted support chassis;

[0008] The top of the vehicle-mounted support chassis is rotatably connected to a horizontally arranged gas phase extraction support plate;

[0009] The gas phase extraction mechanism includes a plurality of gas phase extraction units connected to the top of the gas phase extraction support plate through a support arm mechanism;

[0010] The gas phase extraction unit comprises a vertically extending gas phase extraction shell, an additional support shell is fixed inside the gas phase extraction shell, and an extraction barrier filter cloth is fixed between the inner side wall of the gas phase extraction shell and the outer side wall of the additional support shell;

[0011] The biopile treatment mechanism includes a biopile support plate, a vertically extending ventilation main pipe is fixed on the top of the biopile support plate, a plurality of ventilation branch pipes connected to the inside of the ventilation main pipe are fixed on the outside of the ventilation main pipe, and a plurality of ventilation and exhaust holes connected inside and outside are arranged on the side wall of the ventilation branch pipe.

[0012] Preferably, a vertically penetrating turret support connection hole is provided on the vehicle-mounted support chassis, a turret support rotating ring is fixed to the lower end of the gas phase extraction support plate, and the turret support rotating ring is rotatably connected in the turret support connection hole;

[0013] Preferably, the gas phase extraction support plate has a vertically penetrating central through hole, and a static pressure ventilation mechanism is provided at the central through hole, the static pressure ventilation mechanism comprises a static pressure ventilation support plate connected to the top of the gas phase extraction support plate through a static pressure driving mechanism, and a vertically extending static pressure ventilation pipe is fixed on the static pressure ventilation support plate;

[0014] The lower end of the static pressure ventilation pipe is a pointed end, the upper end of the static pressure ventilation pipe is connected to the atmosphere, and the side wall of the static pressure ventilation pipe is a porous hollow structure that is connected inside and outside.

[0015] Preferably, the hydrostatic drive mechanism comprises a hydrostatic drive support cylinder fixed on the top of the gas phase extraction support plate and extending vertically, a hydrostatic drive support column is slidably connected in the hydrostatic drive support cylinder, a hydrostatic drive matching hole is vertically penetrated on the hydrostatic drive support column, a hydrostatic drive shaft is threadedly connected in the hydrostatic drive matching hole, a hydrostatic drive accommodating shell is fixed on the top of the hydrostatic drive support cylinder, the upper end of the hydrostatic drive shaft extends into the hydrostatic drive accommodating shell, and a hydrostatic drive motor for driving the hydrostatic drive shaft to rotate is fixed in the hydrostatic drive accommodating shell;

[0016] The side wall of the static pressure drive support cylinder is provided with a static pressure moving through groove which is communicated with the inside and outside and extends vertically. The static pressure drive support column is fixedly connected with the static pressure ventilation support plate through a static pressure drive connecting plate.

[0017] Note: Using a static pressure ventilation mechanism, a static pressure ventilation pipe connected to the outside atmosphere is inserted into the center of each gas phase extraction unit, which is conducive to better lateral migration of volatile organic pollutants in the soil.

[0018] Preferably, an impact extraction mechanism is provided in the gas phase extraction shell, and the impact extraction mechanism comprises an impact extraction outer shell fixed in the gas phase extraction shell and extending coaxially therewith, and an impact extraction inner shell is slidably connected to the inner side wall of the impact extraction outer shell;

[0019] The side wall of the impact extraction outer cylinder shell is provided with a plurality of impact extraction outer through holes penetrating in the radial direction thereof, and the side wall of the impact extraction inner cylinder shell is provided with a plurality of impact extraction inner through holes penetrating in the radial direction thereof;

[0020] An inner shell driving fixed cylinder with an opening facing upward is fixed at the bottom of the gas phase extraction cylinder shell, an inner shell driving sliding cylinder is slidably connected in the inner shell driving fixed cylinder, and the outer end of the inner shell driving sliding cylinder is fixedly connected to the impact extraction inner cylinder shell;

[0021] An inner shell driving telescopic rod for driving the inner shell driving sliding cylinder to move up and down is arranged in the inner shell driving fixed cylinder.

[0022] Description: The impact extraction mechanism can create impact-changing air pressure in the impact extraction outer cylinder shell. Under the action of the impact-changing air pressure, the volatile organic pollutants adsorbed in the deep layer of the soil can be better sucked out.

[0023] Preferably, the support arm mechanism comprises a support arm connecting column fixedly connected to the top of the gas phase extraction support plate and extending vertically, a support arm connecting ring is rotatably connected to the support arm connecting column, and a support arm main beam is fixed to the outer side of the support arm connecting ring;

[0024] An extraction unit connection seat is fixed to the other end of the main beam of the support arm, an extraction unit connection shaft is rotatably connected to the extraction unit connection seat, and an extraction unit support plate is fixed to the extraction unit connection shaft;

[0025] The gas phase extraction cylinder shell is connected to the extraction unit support plate through an extraction lifting and lowering mechanism, the extraction lifting and lowering mechanism includes an extraction lifting and lowering support cylinder fixed on the extraction unit support plate and extending vertically, an extraction lifting and lowering driving column is slidably connected in the extraction lifting and lowering support cylinder, a vertically penetrating driving connection hole is provided on the extraction lifting and lowering driving column, a extraction lifting and lowering driving shaft is threadedly connected in the driving connection hole, a lifting and lowering accommodating shell is fixed on the top of the extraction lifting and lowering support cylinder, the upper end of the extraction lifting and lowering driving shaft extends into the lifting and lowering accommodating shell, and a lifting and lowering driving motor for driving the extraction lifting and lowering driving shaft to rotate is fixed in the lifting and lowering accommodating shell;

[0026] The side wall of the extraction lifting and lowering support cylinder is provided with a lifting and moving through groove which is communicated with the inside and outside and extends vertically. The extraction lifting and lowering driving column is fixedly connected with the gas phase extraction cylinder shell through the extraction lifting and lowering connecting plate.

[0027] Description: The support arm connecting ring can drive the gas phase extraction unit to move together through the support arm main beam, the extraction unit connecting seat and the extraction unit support plate, and adjust the relative positions of the gas phase extraction units.

[0028] Preferably, a drilling mechanism is provided on the extraction unit support plate, and the drilling mechanism comprises a drilling mechanism support cylinder fixed on the extraction unit support plate and extending vertically, and a drilling mechanism support column is slidably connected in the drilling mechanism support cylinder;

[0029] A vertically penetrating drilling drive matching hole is provided on the drilling mechanism support column, a drilling drive shaft is connected to the drilling drive matching hole through a threaded transmission, a drilling drive accommodating shell is fixed on the top of the drilling mechanism support cylinder, the upper end of the drilling drive shaft extends into the drilling drive accommodating shell, and a drilling drive motor for driving the drilling drive shaft to rotate is fixed in the drilling drive accommodating shell;

[0030] The side wall of the drilling mechanism support cylinder is provided with a drilling lifting groove which is communicated with the inside and outside and extends vertically. The drilling mechanism support column is connected with a screw drilling machine through a drilling drive connecting plate.

[0031] Description: The drilling mechanism can be used to quickly drill deep holes on the ground that meet the requirements of extraction operations, thereby improving overall work efficiency.

[0032] Preferably, a negative pressure collection tank is fixedly provided on the top of the gas phase extraction support plate, and a negative pressure collection pump is provided in communication with the negative pressure collection tank, and an input end of the negative pressure collection pump is in communication with the inside of the negative pressure collection tank through a pipeline;

[0033] The negative pressure collection tank is connected to the interior of the gas phase extraction cylinder shell through a gas phase extraction main pipe, and a gas phase extraction control valve is provided on the gas phase extraction main pipe;

[0034] An exhaust gas discharge pipe connected to the interior of the negative pressure collecting tank is fixed on the exhaust gas collecting tank, the exhaust gas discharge pipe is connected to the input end of an exhaust gas discharge delivery pump, and an exhaust gas discharge control valve is provided on the exhaust gas discharge pipe;

[0035] An impact negative pressure holding tank is fixedly provided on the top of the gas phase extraction support plate, and an impact negative pressure suction pump is provided in communication with the impact negative pressure holding tank, and an input end of the impact negative pressure suction pump is in communication with the inside of the impact negative pressure holding tank through a pipeline;

[0036] The impact negative pressure holding tank is connected to the interior of the impact extraction outer cylinder shell through an impact extraction connecting pipe, and the impact extraction connecting pipe is provided with an impact extraction control valve;

[0037] An impact discharge pipe connected to the interior of the impact negative pressure holding tank is fixed on the impact discharge tank. The impact discharge pipe is also connected to the input end of the exhaust gas discharge delivery pump. The impact discharge pipe is provided with an impact discharge control valve.

[0038] Note: Under the action of negative pressure, volatile organic pollutants in the soil will pass through the gas phase extraction cylinder shell and enter the negative pressure collection tank through the transmission action of the gas phase extraction main pipe and be collected.

[0039] Preferably, a ventilation opening and closing mechanism is provided on the ventilation branch pipe, and the ventilation opening and closing mechanism comprises an opening and closing control pipe rotatably connected in the ventilation branch pipe and arranged coaxially therewith, and a plurality of exhaust matching holes penetrating along the radial direction are provided on the side wall of the opening and closing control pipe;

[0040] An opening and closing driving motor for driving the opening and closing control pipe to rotate around the axis of the ventilation branch pipe is fixed in the ventilation branch pipe.

[0041] Description: The ventilation opening and closing mechanism is used to facilitate the control of air delivery to the soil.

[0042] Preferably, a plurality of ventilation branch pipes are arranged in a circle around the ventilation main pipe in the circumferential direction and are counted as one group, and a plurality of groups of ventilation branch pipes are arranged along the axial direction of the ventilation main pipe;

[0043] The outer ends of two adjacent ventilation branch pipes arranged along the axial direction of the ventilation main pipe are connected through an adjacent connecting pipe;

[0044] An adjacent control shaft is slidably connected in the ventilation collection pipe along the vertical direction. A plurality of adjacent communication control rings are fixed in the ventilation collection pipe. A plurality of adjacent communication sealed disks are fixed on the adjacent control shaft. The adjacent communication sealed disks are sealed and matched in each adjacent communication control ring in a one-to-one correspondence.

[0045] The upper end of the ventilation manifold is a sealing structure, which is adjacent to the upper end of the control shaft and extends to the outside of the ventilation manifold;

[0046] A proximity control fixed cylinder with an opening facing upward is fixed on the outer top of the ventilation manifold, a proximity control sliding cylinder with an opening facing downward is slidably connected inside the proximity control fixed cylinder, and the outer end of the proximity control sliding cylinder is fixedly connected to the upper end of the proximity control shaft;

[0047] A proximity control telescopic rod is provided in the proximity control fixed cylinder for driving the proximity control sliding cylinder to move up and down;

[0048] The interior of the biopile support plate is a hollow structure, and the lower end of the ventilation manifold is connected to the interior of the biopile support plate;

[0049] A ventilation input pipe connected to the inside of the biopile support plate is fixed on the outside of the biopile support plate, and a channel partition extending spirally along the vertical axis is fixed inside the biopile support plate. The channel partition divides the inside of the biopile support plate into an initial input channel, one end of the initial input channel is connected to the ventilation input pipe, and the other end of the initial input channel is connected to the lower end of the ventilation collection pipe;

[0050] A balanced exhaust pipe connected with the interior of the ventilation manifold is fixed on the outer side of the upper end thereof, and a balanced exhaust control valve is arranged on the balanced exhaust pipe.

[0051] Description: By controlling the state of the ventilation opening and closing mechanism and using adjacent connected closed disks and adjacent connected control rings used in pairs to isolate the inside of the ventilation manifold in sections, it is convenient to control the flow path of the gas, and then adjust the internal temperature of the soil in the form of hot air, and ensure that the heat exchange process is more uniform.

[0052] Compared with the prior art, the beneficial effects of the present invention are embodied in the following aspects:

[0053] 1. The present invention has a reasonable structural design and high-efficiency repair capability. Multiple gas phase extraction units working simultaneously can more thoroughly extract volatile organic pollutants in the soil within a certain range, and the impact extraction mechanism can be used to extract volatile organic pollutants adsorbed in the deep layer of the soil, so that the volatile organic pollutants can be removed more thoroughly;

[0054] 2. The present invention is easy to operate and can continuously degrade residual pollutants in conjunction with a biopile treatment mechanism. The biopile treatment mechanism has ventilation pipes extending in all directions, which can not only provide sufficient oxygen for microorganisms, but also regulate the temperature inside the soil by heat exchange to maintain good activity of the microorganisms.

[0055] 3. The present invention utilizes a static pressure ventilation mechanism to insert a static pressure ventilation pipe connected to the outside atmosphere at the center of each gas phase extraction unit, which is conducive to better lateral migration of volatile organic pollutants in the soil;

[0056] 4. The present invention has wide applicability and is applicable to a variety of pollutants, including petroleum hydrocarbon pollutants, volatile organic compounds (such as benzene series, chlorinated hydrocarbons), pesticide residues, etc. In chemical pollution sites, there may be a variety of organic pollutants at the same time. The system can treat these complex pollutant combinations;

[0057] 5. The present invention has good applicability to soils of different textures (such as sandy soil, loam, clay, etc.). Although the soil texture will affect the efficiency of gas phase extraction, it can be adapted by adjusting the extraction parameters. The biopile remediation process can improve the soil structure to a certain extent, so that the system can play a role in the pollution remediation of different soil types;

[0058] 6. Compared with some traditional chemical remediation methods, the coupling system of the present invention reduces the use of chemical agents and avoids the risk of secondary pollution;

[0059] 7. During the biopile remediation process of the present invention, the activities of microorganisms can decompose organic pollutants and produce organic substances such as humus to increase soil fertility. The polysaccharides and other substances produced by microorganisms during metabolism help to aggregate soil particles, improve soil structure, increase soil porosity, and are beneficial to plant growth and reconstruction of soil ecosystems. BRIEF DESCRIPTION OF THE DRAWINGS

[0060] Figure 1 is a front view of the contaminated soil remediation system of the present invention;

[0061] Figure 2 yes Figure 1 A top view of

[0062] Figure 3 It is a schematic structural diagram of the gas phase extraction unit of the present invention;

[0063] Figure 4 It is a structural schematic diagram of the impact extraction mechanism of the present invention;

[0064] Figure 5 It is a left side view of the drawer lifting and lowering mechanism of the present invention;

[0065] Figure 6 It is a structural schematic diagram of the biopile treatment mechanism of the present invention;

[0066] Figure 7 is a bottom view of the biopile support plate of the present invention;

[0067] Figure 8 It is a structural schematic diagram of the ventilation opening and closing mechanism of the present invention;

[0068] Fig. 9 It is a schematic structural diagram of the proximity control fixing cylinder of the present invention.

[0069] In the figure, 10-vehicle support mechanism, 11-vehicle support chassis, 111-turret support connection hole, 12-crawler drive wheel set, 13-gas phase extraction support plate, 130-central through hole, 131-turret support rotating ring, 20-gas phase extraction mechanism, 21-gas phase extraction unit, 210-extraction barrier filter cloth, 211-gas phase extraction cylinder shell, 212-additional support cylinder shell, 22-impact extraction mechanism, 221-impact extraction outer cylinder shell, 2210-impact extraction outer through hole, 222-impact extraction inner cylinder shell, 2220-impact extraction inner through hole, 223-inner shell drive fixed cylinder, 224-inner shell drive sliding cylinder, 225-inner shell drive telescopic rod, 23-negative pressure summary holding tank, 231-negative pressure summary vacuum pump , 232-gas phase extraction main pipe, 2320-gas phase extraction control valve, 233-waste gas external exhaust pipe, 2330-waste gas external exhaust control valve, 234-waste gas external exhaust delivery pump, 24-impact negative pressure holding tank, 241-impact negative pressure suction pump, 242-impact extraction connecting pipe, 2420-impact extraction control valve, 243-impact external exhaust pipe, 2430-impact external exhaust control valve, 25-static pressure ventilation mechanism, 250-static pressure ventilation pipe, 251-static pressure ventilation support plate, 26-static pressure drive mechanism, 261-static pressure drive support cylinder, 2610-static pressure moving groove, 262-static pressure drive support column, 2620-static pressure drive matching hole, 263-static pressure drive shaft, 264-static pressure drive housing shell, 265-static Pressure drive motor, 266-static pressure drive connecting plate, 30-biopile treatment mechanism, 31-biopile support plate, 311-ventilation input pipe, 312-channel partition, 32-ventilation collection pipe, 321-ventilation branch pipe, 3210-ventilation exhaust hole, 322-adjacent connecting pipe, 323-balanced exhaust pipe, 3230-balanced exhaust control valve, 33-ventilation opening and closing mechanism, 331-opening and closing control pipe, 3310-exhaust matching hole, 332-opening and closing drive motor, 34-adjacent control shaft, 341-adjacent connecting control ring, 342-adjacent connecting closed disk, 343-adjacent control fixed cylinder, 344-adjacent control sliding cylinder, 345-adjacent control telescopic rod, 41-support arm mechanism, 411-support arm connection Column, 412-support arm connecting ring, 413-support arm main beam, 42-extraction unit connecting seat, 421-extraction unit connecting shaft, 422-extraction unit support plate, 43-extraction lifting and lowering mechanism, 431-extraction lifting and lowering support cylinder, 4310-lifting and moving through groove, 432-extraction lifting and lowering drive column, 4320-drive connecting hole, 433-extraction lifting and lowering drive shaft, 434-lifting drive accommodating shell, 435-lifting drive motor, 436-extraction lifting and lowering connecting plate, 50-drilling mechanism, 51-drilling mechanism support cylinder, 510-drilling lifting through groove, 511-drilling mechanism support column, 5110-drilling drive matching hole, 512-drilling drive shaft, 513-drilling drive accommodating shell, 514-drilling drive motor,515-drilling drive connecting plate, 52-screw drilling machine. DETAILED DESCRIPTION

[0070] Combine the following Figure 1-Figure 9 The present invention is described in detail. For the convenience of description, the directions mentioned below are defined as follows: the up, down, left, right, front, and back directions mentioned below are consistent with the up, down, left, right, front, and back directions of the projection relationship of the respective main views or structural schematic diagrams themselves.

[0071] Example 1: Contaminated soil remediation system based on gas phase extraction and biopile coupling, such as Figure 1 , Figure 6 As shown, it includes a vehicle-mounted support mechanism 10, a gas phase extraction mechanism 20 connected to the vehicle-mounted support mechanism 10, and a biopile treatment mechanism 30 used in conjunction with the gas phase extraction mechanism 20;

[0072] like Figure 1 As shown, the vehicle-mounted support mechanism 10 includes a vehicle-mounted support chassis 11, and a plurality of tracked drive wheel sets 12 are fixedly mounted on the bottom of the vehicle-mounted support chassis 11;

[0073] The crawler-type driving wheel set 12 is a crawler-type driving wheel set assembly driven by a motor in the prior art, and the suspension support structure of the crawler-type driving wheel set 12 is fixedly connected to the bottom of the vehicle-mounted supporting chassis 11;

[0074] The top of the vehicle-mounted support chassis 11 is rotatably connected to a horizontally arranged gas phase extraction support plate 13;

[0075] like Figure 1 As shown, the gas phase extraction mechanism 20 includes a plurality of gas phase extraction units 21 connected to the top of the gas phase extraction support plate 13 through a support arm mechanism 41;

[0076] like Figure 3 As shown, the gas phase extraction unit 21 includes a vertically extending gas phase extraction shell 211, an additional support shell 212 is fixed inside the gas phase extraction shell 211, and an extraction barrier filter cloth 210 is fixed between the inner wall of the gas phase extraction shell 211 and the outer wall of the additional support shell 212;

[0077] The side walls of the gas phase extraction shell 211 and the additional support shell 212 are both porous hollow structures that communicate with each other inside and outside;

[0078] The extraction barrier filter cloth 210 is a non-woven fabric of the prior art;

[0079] like Figure 6As shown, the biopile treatment mechanism 30 includes a biopile support plate 31, a vertically extending ventilation main pipe 32 is fixed on the top of the biopile support plate 31, a plurality of ventilation branch pipes 321 connected to the interior of the ventilation main pipe 32 are fixed on the outside of the ventilation main pipe 32, and a plurality of ventilation exhaust holes 3210 connected to the inside and outside are provided on the side wall of the ventilation branch pipe 321.

[0080] like Figure 1 As shown, the vehicle-mounted support chassis 11 has a vertically penetrating turret support connection hole 111, and a turret support rotating ring 131 is fixed to the lower end of the gas phase extraction support plate 13, and the turret support rotating ring 131 is rotatably connected in the turret support connection hole 111;

[0081] A servo motor of the prior art is fixed on the vehicle-mounted support chassis 11, and the servo motor drives the turret support rotating ring 131 to rotate around the vertical axis of the turret support connecting hole 111 through gear transmission;

[0082] like Figure 3 , Figure 4 As shown, the gas phase extraction shell 211 is provided with an impact extraction mechanism 22, and the impact extraction mechanism 22 includes an impact extraction outer shell 221 fixed in the gas phase extraction shell 211 and extending coaxially therewith, and the inner side wall of the impact extraction outer shell 221 is slidably connected to the impact extraction inner shell 222;

[0083] The impact extraction inner cylinder shell 222 can only slide along the axis direction of the impact extraction outer cylinder shell 221;

[0084] The side wall of the impact extraction outer cylinder shell 221 has a plurality of impact extraction outer through holes 2210 penetrating along the radial direction thereof, and the side wall of the impact extraction inner cylinder shell 222 has a plurality of impact extraction inner through holes 2220 penetrating along the radial direction thereof;

[0085] An inner shell driving fixed cylinder 223 with an opening facing upward is fixed to the bottom of the gas phase extraction cylinder shell 211, an inner shell driving sliding cylinder 224 is slidably connected in the inner shell driving fixed cylinder 223, and the outer end of the inner shell driving sliding cylinder 224 is fixedly connected to the impact extraction inner cylinder shell 222;

[0086] An inner shell driving fixed cylinder 223 is provided with an inner shell driving telescopic rod 225 for driving the inner shell driving sliding cylinder 224 to move up and down. The inner shell driving telescopic rod 225 is an electric-controlled telescopic rod of the prior art. The outer rod end of the inner shell driving telescopic rod 225 is fixedly connected to the bottom of the inner shell driving fixed cylinder 223, and the inner rod end of the inner shell driving telescopic rod 225 is fixedly connected to the top of the inner shell driving sliding cylinder 224.

[0087] During the sliding process of the impact extraction inner cylinder shell 222 along the axial direction of the impact extraction outer cylinder shell 221, when each impact extraction inner through hole 2220 is connected with each impact extraction outer through hole 2210 in a one-to-one correspondence, the impact extraction mechanism 22 is set to be in the "open state";

[0088] When each impact extraction inner through hole 2220 and each impact extraction outer through hole 2210 are offset and isolated from each other, the impact extraction mechanism 22 is set to be in a "closed state".

[0089] Embodiment 2: Based on embodiment 1, Figure 1 As shown, the support arm mechanism 41 includes a support arm connecting column 411 fixedly connected to the top of the gas phase extraction support plate 13 and extending vertically, a support arm connecting ring 412 is rotatably connected to the support arm connecting column 411, and a support arm main beam 413 is fixed to the outer side of the support arm connecting ring 412;

[0090] The support arm connecting ring 412 is driven by a prior art servo motor fixed on the support arm connecting column 411 to rotate around the vertical axis of the support arm connecting column 411;

[0091] The other end of the support arm main beam 413 is fixed with an extraction unit connection seat 42, the extraction unit connection seat 42 is rotatably connected with an extraction unit connection shaft 421, and the extraction unit support plate 422 is fixed to the extraction unit connection shaft 421;

[0092] The extraction unit connecting shaft 421 is driven by a prior art servo motor fixed on the extraction unit connecting base 42 to rotate around a vertical axis.

[0093] like Figure 5 As shown, the gas phase extraction cylinder shell 211 is connected to the extraction unit support plate 422 through an extraction lifting and lowering mechanism 43, and the extraction lifting and lowering mechanism 43 includes an extraction lifting and lowering support cylinder 431 fixed on the extraction unit support plate 422 and extending vertically, and an extraction lifting and lowering driving column 432 is slidably connected in the extraction lifting and lowering support cylinder 431, and a vertically penetrating driving connection hole 4320 is provided on the extraction lifting and lowering driving column 432, and an extraction lifting and lowering driving shaft 433 is connected to the driving connection hole 4320 through a thread transmission, and a lifting and lowering driving accommodating shell 434 is fixed on the top of the extraction lifting and lowering support cylinder 431, and the upper end of the extraction lifting and lowering driving shaft 433 extends into the lifting and lowering accommodating shell 434, and a lifting and lowering driving motor 435 for driving the extraction lifting and lowering driving shaft 433 to rotate is fixed in the lifting and lowering accommodating shell 434;

[0094] The lifting drive motor 435 is a servo motor of the prior art, and the output shaft of the lifting drive motor 435 is connected to the upper end of the lifting drive shaft 433 through a coupling.

[0095] The side wall of the extraction lifting support cylinder 431 is provided with a lifting and moving groove 4310 which is connected to the inside and outside and extends vertically. The extraction lifting drive column 432 is fixedly connected to the gas phase extraction cylinder shell 211 through the extraction lifting connection plate 436.

[0096] Embodiment 3: Based on embodiment 2, Figure 1 As shown, the gas phase extraction support plate 13 has a vertically penetrating central through hole 130, and a static pressure ventilation mechanism 25 is provided at the central through hole 130. The static pressure ventilation mechanism 25 includes a static pressure ventilation support plate 251 connected to the top of the gas phase extraction support plate 13 through a static pressure driving mechanism 26. The static pressure ventilation support plate 251 is located directly above the central through hole 130, and a vertically extending static pressure ventilation pipe 250 is fixed on the static pressure ventilation support plate 251;

[0097] The lower end of the static pressure ventilation pipe 250 is a pointed end, the upper end of the static pressure ventilation pipe 250 is connected to the atmosphere, and the side wall of the static pressure ventilation pipe 250 is a porous hollow structure that is connected inside and outside;

[0098] The static pressure drive mechanism 26 includes a static pressure drive support cylinder 261 fixed on the top of the gas phase extraction support plate 13 and extending vertically, a static pressure drive support column 262 is slidably connected in the static pressure drive support cylinder 261, a static pressure drive support column 262 has a vertically penetrating static pressure drive matching hole 2620, a static pressure drive shaft 263 is threadedly connected in the static pressure drive matching hole 2620, a static pressure drive accommodating shell 264 is fixed on the top of the static pressure drive support cylinder 261, the upper end of the static pressure drive shaft 263 extends into the static pressure drive accommodating shell 264, and a static pressure drive motor 265 for driving the static pressure drive shaft 263 to rotate is fixed in the static pressure drive accommodating shell 264;

[0099] The static pressure drive motor 265 is a servo motor of the prior art, and the output shaft of the static pressure drive motor 265 is connected to the upper end of the static pressure drive shaft 263 through a coupling;

[0100] The side wall of the static pressure drive support cylinder 261 is provided with a static pressure moving groove 2610 which is communicated with the inside and outside and extends vertically. The static pressure drive support column 262 is fixedly connected to the static pressure ventilation support plate 251 through a static pressure drive connecting plate 266 .

[0101] Embodiment 4: Based on embodiment 3, Figure 5 As shown, a drilling mechanism 50 is provided on the extraction unit support plate 422, and the drilling mechanism 50 includes a drilling mechanism support cylinder 51 fixed on the extraction unit support plate 422 and extending vertically, and a drilling mechanism support column 511 is slidably connected in the drilling mechanism support cylinder 51;

[0102] The drilling mechanism support column 511 has a vertically penetrating drilling drive matching hole 5110, and the drilling drive matching hole 5110 is threadedly connected to a drilling drive shaft 512. A drilling drive accommodating shell 513 is fixed to the top of the drilling mechanism support cylinder 51, and the upper end of the drilling drive shaft 512 extends into the inside of the drilling drive accommodating shell 513. A drilling drive motor 514 for driving the drilling drive shaft 512 to rotate is fixed in the drilling drive accommodating shell 513;

[0103] The drilling drive motor 514 is a servo motor of the prior art, and the output shaft of the drilling drive motor 514 is transmission-connected to the upper end of the drilling drive shaft 512 via a coupling;

[0104] The side wall of the drilling mechanism support cylinder 51 is provided with a drilling lifting groove 510 which is connected to the inside and outside and extends vertically. The drilling mechanism support column 511 is connected to a screw drilling machine 52 through a drilling drive connecting plate 515;

[0105] The screw drilling machine 52 is a spiral drilling machine of the prior art.

[0106] Embodiment 5: Based on embodiment 4, Figure 2 As shown, a negative pressure summary holding tank 23 is fixedly provided on the top of the gas phase extraction support plate 13, and a negative pressure summary air pump 231 is provided in communication with the negative pressure summary holding tank 23, and an input end of the negative pressure summary air pump 231 is in communication with the inside of the negative pressure summary holding tank 23 through a pipeline;

[0107] The negative pressure collection tank 23 is connected to the interior of the gas phase extraction cylinder shell 211 through a gas phase extraction main pipe 232, and a gas phase extraction control valve 2320 is provided on the gas phase extraction main pipe 232;

[0108] An exhaust gas discharge pipe 233 connected to the interior of the negative pressure collecting tank 23 is fixed thereon, the exhaust gas discharge pipe 233 is connected to the input end of an exhaust gas discharge delivery pump 234, and an exhaust gas discharge control valve 2330 is provided on the exhaust gas discharge pipe 233;

[0109] An impact negative pressure holding tank 24 is fixedly provided on the top of the gas phase extraction support plate 13, and an impact negative pressure suction pump 241 is provided in communication with the impact negative pressure holding tank 24, and an input end of the impact negative pressure suction pump 241 is in communication with the inside of the impact negative pressure holding tank 24 through a pipeline;

[0110] The impact negative pressure holding tank 24 is connected to the interior of the impact extraction outer cylinder shell 221 through the impact extraction connecting pipe 242, and the impact extraction connecting pipe 242 is provided with an impact extraction control valve 2420;

[0111] An impact discharge pipe 243 connected to the interior of the impact negative pressure holding tank 24 is fixed thereon. The impact discharge pipe 243 is also connected to the input end of the exhaust gas discharge delivery pump 234 . The impact discharge pipe 243 is provided with an impact discharge control valve 2430 .

[0112] Embodiment 6: Based on embodiment 5, Figure 8 As shown, a ventilation opening and closing mechanism 33 is provided on the ventilation branch pipe 321, and the ventilation opening and closing mechanism 33 includes an opening and closing control pipe 331 which is rotatably connected in the ventilation branch pipe 321 and arranged coaxially therewith, and a plurality of exhaust matching holes 3310 which penetrate in the radial direction thereof are provided on the side wall of the opening and closing control pipe 331;

[0113] An opening and closing drive motor 332 is fixed in the ventilation branch pipe 321 to drive the opening and closing control pipe 331 to rotate around the axis of the ventilation branch pipe 321. The opening and closing drive motor 332 is a servo motor in the prior art. The opening and closing drive motor 332 drives the opening and closing control pipe 331 to rotate through a gear ring transmission.

[0114] During the rotation of the opening and closing control tube 331, when each exhaust matching hole 3310 is connected with each ventilation exhaust hole 3210 in a one-to-one correspondence, the ventilation opening and closing mechanism 33 is in an "open state";

[0115] When each exhaust matching hole 3310 and each ventilation exhaust hole 3210 are displaced and isolated from each other, the ventilation opening and closing mechanism 33 is in a "closed state";

[0116] like Figure 6 As shown, a plurality of ventilation branch pipes 321 are arranged in a circle around the ventilation main pipe 32, and are counted as one group. A plurality of groups of ventilation branch pipes 321 are arranged along the axial direction of the ventilation main pipe 32.

[0117] The outer ends of two adjacent ventilation branch pipes 321 arranged along the axial direction of the ventilation main pipe 32 are connected through an adjacent connecting pipe 322;

[0118] An adjacent control shaft 34 is slidably connected in the ventilation manifold 32 along the vertical direction. A plurality of adjacent communication control rings 341 are fixed in the ventilation manifold 32. A plurality of adjacent communication sealed disks 342 are fixed on the adjacent control shaft 34. The adjacent communication sealed disks 342 are sealed and matched in each adjacent communication control ring 341 in a one-to-one correspondence.

[0119] The upper end of the ventilation manifold 32 is a sealing structure, and is adjacent to the upper end of the control shaft 34 and extends to the outside of the ventilation manifold 32;

[0120] like Fig. 9As shown, a proximity control fixed cylinder 343 with an opening facing upward is fixed on the outer top of the ventilation manifold 32, a proximity control sliding cylinder 344 with an opening facing downward is slidably connected inside the proximity control fixed cylinder 343, and the outer end of the proximity control sliding cylinder 344 is fixedly connected to the upper end of the proximity control shaft 34;

[0121] A proximity control telescopic rod 345 is provided in the proximity control fixed cylinder 343 for driving the proximity control sliding cylinder 344 to move up and down. The proximity control telescopic rod 345 is an electric control telescopic rod of the prior art. The outer rod end of the proximity control telescopic rod 345 is fixedly connected to the bottom of the proximity control fixed cylinder 343, and the inner rod end of the proximity control telescopic rod 345 is fixedly connected to the top of the proximity control sliding cylinder 344.

[0122] The interior of the biopile support plate 31 is a hollow structure, and the lower end of the ventilation manifold 32 is connected to the interior of the biopile support plate 31;

[0123] A ventilation input pipe 311 connected to the inside of the biopile support plate 31 is fixed to the outside of the biopile support plate 31, and a channel partition plate 312 spirally extending along the vertical axis is fixed to the inside of the biopile support plate 31. The channel partition plate 312 divides the inside of the biopile support plate 31 into an initial input channel, one end of the initial input channel is connected to the ventilation input pipe 311, and the other end of the initial input channel is connected to the lower end of the ventilation collection pipe 32;

[0124] A balanced exhaust pipe 323 connected to the interior of the ventilation manifold 32 is fixed to the outer side of the upper end thereof, and a balanced exhaust control valve 3230 is provided on the balanced exhaust pipe 323 .

[0125] Example 7: This example describes a contaminated soil remediation method based on gas phase extraction and biopile coupling, based on the contaminated soil remediation system based on gas phase extraction and biopile coupling of the above-mentioned Example 1, comprising the following steps:

[0126] S1. Driven by the crawler-type driving wheel set 12, the entire system is moved to the area to be repaired and each gas phase extraction unit 21 is evenly spread around the vehicle-mounted supporting chassis 11;

[0127] S2, using the drilling equipment of the prior art to drill a deep hole for gas phase extraction on the ground, and then placing the gas phase extraction unit 21 into the deep hole to perform gas phase extraction operation;

[0128] S3, extracting volatile organic pollutants in the soil using the impact extraction mechanism 22;

[0129] The impact extraction mechanism 22 can create impact-changing air pressure in the impact extraction outer cylinder shell 221, and under the effect of the impact-changing air pressure, the volatile organic pollutants adsorbed in the deep layer of the soil can be better sucked out;

[0130] S4, the extracted soil is subjected to microbial fermentation treatment using a biopile treatment mechanism 30;

[0131] The extracted soil is crushed, and fermentation bacteria Pseudomonas aeruginosa is added into the soil, and the dosage of Pseudomonas aeruginosa is 5g / Kg;

[0132] The soil mixed with fermentation bacteria is piled on the biopile support plate 31, and the air delivery pump of the prior art is used to deliver air to the inside of the biopile support plate 31. The air inside the biopile support plate 31 enters the ventilation main pipe 32 and is then distributed to each ventilation branch pipe 321 to provide oxygen for the microorganisms inside the soil for microbial fermentation treatment.

[0133] Embodiment 8: This embodiment describes a contaminated soil remediation method based on gas phase extraction and biopile coupling, and is based on the contaminated soil remediation system based on gas phase extraction and biopile coupling of the above-mentioned embodiment 2. The difference from embodiment 7 is that in step S1, the support arm connecting ring 412 is driven by a prior art servo motor fixed on the support arm connecting column 411 to rotate around the vertical axis of the support arm connecting column 411;

[0134] The support arm connecting ring 412 further drives the gas phase extraction unit 21 to move together through the support arm main beam 413, the extraction unit connecting seat 42 and the extraction unit support plate 422, so as to adjust the relative positions between the gas phase extraction units 21;

[0135] The extraction unit connecting shaft 421 is driven by a prior art servo motor fixed on the extraction unit connecting base 42 to rotate around a vertical axis, and the extraction unit connecting shaft 421 drives the extraction unit supporting plate 422 to rotate together with the gas phase extraction unit 21, so that the gas phase extraction cylinder shell 211 is coaxially aligned with the deep hole in the vertical direction;

[0136] The gas phase extraction cylinder shell 211 is driven by the extraction lifting and lowering mechanism 43 to extend into the deep hole, and performs gas phase extraction operation on the contaminated soil under the action of negative pressure;

[0137] The output shaft of the lifting drive motor 435 drives the extraction lifting drive shaft 433 to rotate. Under the cooperation of the threaded transmission, the extraction lifting drive shaft 433 drives the extraction lifting drive column 432 to move downward in the extraction lifting support cylinder 431. The extraction lifting drive column 432 drives the gas phase extraction cylinder shell 211 to move downward together through the extraction lifting connection plate 436, so that the gas phase extraction cylinder shell 211 extends into the deep hole.

[0138] The upper end of the gas phase extraction shell 211 has a circle of outwardly convex closed matching ring, which can fit tightly at the hole of the deep hole.

[0139] Embodiment 9: This embodiment records a contaminated soil remediation method based on gas phase extraction and biopile coupling, which is based on the contaminated soil remediation system based on gas phase extraction and biopile coupling of the above embodiment 3. The difference from embodiment 8 is that in step S1, a static pressure ventilation pipe 250 connected to the outside atmosphere is inserted into the center of each gas phase extraction unit 21 by using a static pressure ventilation mechanism 25, which is conducive to better lateral migration of volatile organic pollutants in the soil;

[0140] The static pressure drive motor 265 drives the static pressure drive shaft 263 to rotate. Under the cooperation of the threaded transmission, the static pressure drive shaft 263 drives the static pressure drive support column 262 to move downward in the static pressure drive support cylinder 261. The static pressure drive support column 262 then drives the static pressure ventilation support plate 251 together with the static pressure ventilation pipe 250 to move downward through the static pressure drive connecting plate 266, so that the tip of the static pressure ventilation pipe 250 is inserted into the soil under the action of static pressure.

[0141] Embodiment 10: This embodiment records a contaminated soil remediation method based on gas phase extraction and biopile coupling, and a contaminated soil remediation system based on gas phase extraction and biopile coupling based on the above-mentioned embodiment 4. The difference from embodiment 9 is that in step S2, a deep hole for gas phase extraction is drilled on the ground by using a drilling mechanism 50. First, the screw drilling machine 52 is started, and the output shaft of the drilling drive motor 514 drives the drilling drive shaft 512 to rotate. Under the cooperation of the threaded transmission, the drilling drive shaft 512 drives the drilling mechanism support column 511 to move downward in the drilling mechanism support cylinder 51. The drilling mechanism support column 511 drives the screw drilling machine 52 to move downward together through the drilling drive connecting plate 515, and the spiral drill rod of the screw drilling machine 52 is used to drill a deep hole on the ground;

[0142] Then the output shaft of the drilling drive motor 514 is reversed to drive the screw drill 52 to move upward through the drilling drive shaft 512 and the drilling mechanism support column 511, so that the screw drill 52 is pulled out of the deep hole.

[0143] Embodiment 11: This embodiment describes a contaminated soil remediation method based on gas phase extraction and biopile coupling, which is based on the contaminated soil remediation system based on gas phase extraction and biopile coupling of the above-mentioned embodiment 5. The difference from embodiment 10 is that in step S2, the negative pressure summary pump 231 is used to evacuate the inside of the negative pressure summary tank 23. When the pressure in the negative pressure summary tank 23 reaches 10 -2 Pa, and the gas phase extraction control valve 2320 is opened; the negative pressure collection tank 23 is connected to the gas phase extraction shell 211 through the gas phase extraction main pipe 232. Under the action of negative pressure, the volatile organic pollutants in the soil will pass through the gas phase extraction shell 211 and enter the negative pressure collection tank 23 through the transmission effect of the gas phase extraction main pipe 232 and be collected;

[0144] The system is used in conjunction with the existing tail gas treatment equipment, which can purify the volatile organic pollutants in the soil;

[0145] When the air pressure in the negative pressure collection tank 23 is balanced with the outside, the gas phase extraction control valve 2320 is closed, the exhaust gas discharge pump 234 is started, and the exhaust gas discharge control valve 2330 is opened to transport the exhaust gas collected in the negative pressure collection tank 23 to the tail gas treatment equipment of the prior art for purification;

[0146] Then, the negative pressure collecting tank 23 is repeatedly evacuated to continue collecting volatile organic pollutants in the soil under the action of negative pressure.

[0147] Embodiment 12: This embodiment describes a contaminated soil remediation method based on gas phase extraction and biopile coupling, which is based on the contaminated soil remediation system based on gas phase extraction and biopile coupling of the above-mentioned embodiment 5. The difference from embodiment 11 is that in step S3, the inside of the impact negative pressure holding tank 24 is firstly evacuated by using the impact negative pressure suction pump 241. When the pressure in the impact negative pressure holding tank 24 reaches 10 -2 Pa, and then stop, and open the shock extraction control valve 2420, so that the shock negative pressure holding tank 24 is connected with the shock extraction outer cylinder shell 221 through the shock extraction connecting pipe 242;

[0148] During the sliding process of the impact extraction inner cylinder shell 222 along the axial direction of the impact extraction outer cylinder shell 221, when each impact extraction inner through hole 2220 is connected with each impact extraction outer through hole 2210 in a one-to-one correspondence, the impact extraction mechanism 22 is set to be in the "open state";

[0149] When each impact extraction inner through hole 2220 and each impact extraction outer through hole 2210 are displaced and isolated from each other, the impact extraction mechanism 22 is set to be in a "closed state";

[0150] Then, under the driving force of the inner rod of the inner shell driving telescopic rod 225 to extend and retract, the impact extraction inner cylinder shell 222 reciprocates along the axis of the impact extraction outer cylinder shell 221, so that the impact extraction mechanism 22 switches back and forth between the "open state" and the "closed state" cyclically;

[0151] When the impact extraction mechanism 22 is in the "open state", the interior of the impact extraction outer shell 221 is connected to the interior of the gas phase extraction shell 211 through the impact extraction outer through hole 2210 and the impact extraction inner through hole 2220, and then under the action of the impact changing gas pressure, the volatile organic pollutants adsorbed in the deep layer of the soil are sucked out, and under the conveying action of the impact extraction connecting pipe 242, these volatile organic pollutants are transported to the impact negative pressure holding tank 24 and collected;

[0152] When the air pressure in the impact negative pressure holding tank 24 is balanced with the outside air pressure, the impact extraction control valve 2420 is closed, the exhaust gas discharge pump 234 is started and the impact exhaust control valve 2430 is opened to transport the exhaust gas collected in the impact negative pressure holding tank 24 to the exhaust treatment equipment of the prior art for purification.

[0153] Embodiment 13: This embodiment describes a contaminated soil remediation method based on gas phase extraction and biopile coupling, which is based on the contaminated soil remediation system based on gas phase extraction and biopile coupling of the above embodiment 6, and is different from embodiment 12 in that it further includes step S5;

[0154] S5. Fermentation temperature adjustment:

[0155] An opening and closing drive motor 332 is fixed in the ventilation branch pipe 321 to drive the opening and closing control pipe 331 to rotate around the axis of the ventilation branch pipe 321. The opening and closing drive motor 332 is a servo motor in the prior art. The opening and closing drive motor 332 drives the opening and closing control pipe 331 to rotate through a gear ring transmission.

[0156] During the rotation of the opening and closing control tube 331, when each exhaust matching hole 3310 is connected with each ventilation exhaust hole 3210 in a one-to-one correspondence, the ventilation opening and closing mechanism 33 is in an "open state";

[0157] When each exhaust matching hole 3310 and each ventilation exhaust hole 3210 are displaced and isolated from each other, the ventilation opening and closing mechanism 33 is in a "closed state";

[0158] And under the drive of the adjacent control telescopic rod 345, the adjacent control shaft 34 moves downward, so that the adjacent communication sealing disks 342 are sealed and matched in each adjacent communication control ring 341 one by one, and the inside of the ventilation manifold 32 is segmented and isolated;

[0159] When the temperature inside the soil needs to be adjusted, the ventilation opening and closing mechanism 33 is in the "closed state", and the air delivery pump of the prior art is used to deliver hot air to the inside of the biopile support plate 31 through the ventilation input pipe 311. Due to the connection effect of the adjacent connecting pipe 322, the hot air inside the biopile support plate 31 enters the ventilation manifold 32 and then passes through each ventilation branch pipe 321 from bottom to top, so that the hot air can fully exchange heat with the inside of the soil, adjust the temperature inside the soil, and help improve the activity of microorganisms.

[0160] The plurality of ventilation branch pipes 321 arranged along the axial direction of the ventilation main pipe 32 are numbered from bottom to top, in sequence as L1, L2, L3, L4, ..., Ln;

[0161] The outer ends of L1 and L2 are connected one by one through adjacent connecting pipes 322;

[0162] The outer ends of L3 and L4 are connected one by one through adjacent connecting pipes 322, and so on;

[0163] The adjacent communication sealing disk 342 and the adjacent communication control ring 341 used in pairs are numbered from bottom to top, and are sequentially Z1, Z2, Z3, Z4, ... Zn;

[0164] Z1 blocks the position between L1 and L2 in the ventilation manifold 32, so that L1 and L2 are connected only through the adjacent connecting pipe 322, while L2 and L3 continue to be connected through the ventilation manifold 32;

[0165] Z2 blocks the position between L3 and L4 in the ventilation manifold 32, so that L3 and L4 are connected only through the adjacent connecting pipe 322, while L4 and L5 continue to be connected through the ventilation manifold 32, and so on.

[0166] Example 14: The difference from Example 13 is that the fermentation bacteria added to the soil are Pseudomonas aeruginosa and Bacillus in a mass ratio of 1:2, and the addition amount is 10g / Kg.

[0167] Example 15: The difference from Example 13 is that the fermentation bacteria added to the soil are Rhodococcus and white rot fungi mixed in a mass ratio of 1:2, and the addition amount is 20g / Kg.

[0168] Example 16: The difference from Example 13 is that the fermentation bacteria added to the soil are Aspergillus niger and Streptomyces mixed in a mass ratio of 1:2, and the addition amount is 30g / Kg.

Claims

1. A contaminated soil remediation system based on gas phase extraction and biopile coupling, characterized in that: It comprises a vehicle-mounted support mechanism (10), a gas phase extraction mechanism (20) connected to the vehicle-mounted support mechanism (10), and a biopile treatment mechanism (30) used in conjunction with the gas phase extraction mechanism (20); The vehicle-mounted support mechanism (10) comprises a vehicle-mounted support chassis (11), and a plurality of crawler-type drive wheel sets (12) are fixedly mounted on the bottom of the vehicle-mounted support chassis (11); The top of the vehicle-mounted support chassis (11) is rotatably connected to a horizontally arranged gas phase extraction support plate (13); The gas phase extraction mechanism (20) comprises a plurality of gas phase extraction units (21) connected to the top of the gas phase extraction support plate (13) via a support arm mechanism (41); The gas phase extraction unit (21) comprises a vertically extending gas phase extraction shell (211), an additional support shell (212) is fixed inside the gas phase extraction shell (211), and an extraction barrier filter cloth (210) is fixed between the inner wall of the gas phase extraction shell (211) and the outer wall of the additional support shell (212); The biopile treatment mechanism (30) comprises a biopile support plate (31), a vertically extending ventilation main pipe (32) is fixed on the top of the biopile support plate (31), a plurality of ventilation branch pipes (321) connected to the interior of the ventilation main pipe (32) are fixed on the outside of the ventilation main pipe (32), and a plurality of ventilation exhaust holes (3210) connected to the inside and outside of the ventilation branch pipe (321) are provided on the side wall of the ventilation branch pipe (321).

2. The contaminated soil remediation system based on gas phase extraction and biopile coupling according to claim 1 is characterized in that: The vehicle-mounted support chassis (11) is provided with a vertically penetrating turret support connection hole (111), and a turret support rotating ring (131) is fixed to the lower end of the gas phase extraction support plate (13), and the turret support rotating ring (131) is rotatably connected in the turret support connection hole (111).

3. The contaminated soil remediation system based on gas phase extraction and biopile coupling according to claim 1 is characterized in that: The gas phase extraction support plate (13) has a central through hole (130) extending vertically therethrough, and a static pressure ventilation mechanism (25) is provided at the central through hole (130). The static pressure ventilation mechanism (25) comprises a static pressure ventilation support plate (251) connected to the top of the gas phase extraction support plate (13) via a static pressure driving mechanism (26), and a vertically extending static pressure ventilation pipe (250) is fixed to the static pressure ventilation support plate (251); The lower end of the static pressure ventilation pipe (250) is a pointed end, the upper end of the static pressure ventilation pipe (250) is connected to the atmosphere, and the side wall of the static pressure ventilation pipe (250) is a porous hollow structure that is connected inside and outside.

4. The contaminated soil remediation system based on gas phase extraction and biopile coupling according to claim 3 is characterized in that: The static pressure drive mechanism (26) comprises a static pressure drive support cylinder (261) fixed on the top of the gas phase extraction support plate (13) and extending vertically, a static pressure drive support column (262) is slidably connected in the static pressure drive support cylinder (261), a static pressure drive matching hole (2620) vertically penetrating therethrough is provided on the static pressure drive support column (262), a static pressure drive shaft (263) is threadedly connected in the static pressure drive matching hole (2620), a static pressure drive accommodating shell (264) is fixed on the top of the static pressure drive support cylinder (261), an upper end of the static pressure drive shaft (263) extends into the static pressure drive accommodating shell (264), and a static pressure drive motor (265) for driving the static pressure drive shaft (263) to rotate is fixed in the static pressure drive accommodating shell (264); The side wall of the static pressure drive support cylinder (261) is provided with a static pressure moving groove (2610) which is communicated with the inside and outside and extends vertically. The static pressure drive support column (262) is fixedly connected to the static pressure ventilation support plate (251) via a static pressure drive connecting plate (266).

5. The contaminated soil remediation system based on gas phase extraction and biopile coupling according to claim 1 is characterized in that: An impact extraction mechanism (22) is provided in the gas phase extraction cylinder shell (211), and the impact extraction mechanism (22) comprises an impact extraction outer cylinder shell (221) fixed in the gas phase extraction cylinder shell (211) and extending coaxially therewith, and an impact extraction inner cylinder shell (222) is slidably connected to the inner side wall of the impact extraction outer cylinder shell (221); The side wall of the impact extraction outer cylinder shell (221) has a plurality of impact extraction outer through holes (2210) penetrating along the radial direction thereof, and the side wall of the impact extraction inner cylinder shell (222) has a plurality of impact extraction inner through holes (2220) penetrating along the radial direction thereof; An inner shell driving fixed cylinder (223) with an opening facing upward is fixed to the inner bottom of the gas phase extraction cylinder shell (211), an inner shell driving sliding cylinder (224) is slidably connected in the inner shell driving fixed cylinder (223), and the outer end of the inner shell driving sliding cylinder (224) is fixedly connected to the impact extraction inner cylinder shell (222); An inner shell driving telescopic rod (225) for driving the inner shell driving sliding cylinder (224) to move up and down is arranged in the inner shell driving fixed cylinder (223).

6. The contaminated soil remediation system based on gas phase extraction and biopile coupling according to claim 1 is characterized in that: The support arm mechanism (41) comprises a support arm connecting column (411) fixedly connected to the top of the gas phase extraction support plate (13) and extending vertically, a support arm connecting ring (412) being rotatably connected to the support arm connecting column (411), and a support arm main beam (413) being fixed to the outer side of the support arm connecting ring (412); The other end of the support arm main beam (413) is fixed with an extraction unit connecting seat (42), the extraction unit connecting seat (42) is rotatably connected with an extraction unit connecting shaft (421), and the extraction unit supporting plate (422) is fixed to the extraction unit connecting shaft (421); The gas phase extraction cylinder shell (211) is connected to the extraction unit support plate (422) through an extraction lifting and lowering mechanism (43), the extraction lifting and lowering mechanism (43) comprises an extraction lifting and lowering support cylinder (431) fixed on the extraction unit support plate (422) and extending vertically, a extraction lifting and lowering driving column (432) is slidably connected inside the extraction lifting and lowering support cylinder (431), a vertically penetrating driving connection hole (4320) is provided on the extraction lifting and lowering driving column (432), and an extraction lifting and lowering driving shaft (433) is connected to the driving connection hole (4320) through a threaded transmission, a lifting and lowering driving accommodating shell (434) is fixed on the top of the extraction lifting and lowering support cylinder (431), the upper end of the extraction lifting and lowering driving shaft (433) extends into the lifting and lowering driving accommodating shell (434), and a lifting and lowering driving motor (435) for driving the extraction lifting and lowering driving shaft (433) to rotate is fixed inside the lifting and lowering driving accommodating shell (434); The side wall of the extraction lifting support cylinder (431) is provided with a lifting and moving groove (4310) which is connected inside and outside and extends vertically, and the extraction lifting and lowering driving column (432) is fixedly connected to the gas phase extraction cylinder shell (211) through a extraction lifting and lowering connecting plate (436).

7. The contaminated soil remediation system based on gas phase extraction and biopile coupling according to claim 1 is characterized in that: The extraction unit support plate (422) is provided with a drilling mechanism (50), the drilling mechanism (50) comprising a drilling mechanism support cylinder (51) fixed on the extraction unit support plate (422) and extending vertically, a drilling mechanism support column (511) being slidably connected inside the drilling mechanism support cylinder (51); The drilling mechanism support column (511) is provided with a vertically penetrating drilling drive matching hole (5110), the drilling drive matching hole (5110) is internally threadedly connected to a drilling drive shaft (512), a drilling drive accommodating shell (513) is fixed to the top of the drilling mechanism support cylinder (51), the upper end of the drilling drive shaft (512) extends into the interior of the drilling drive accommodating shell (513), and a drilling drive motor (514) for driving the drilling drive shaft (512) to rotate is fixed in the drilling drive accommodating shell (513); The side wall of the drilling mechanism support cylinder (51) is provided with a drilling lifting groove (510) which is communicated with the inside and outside and extends vertically. The drilling mechanism support column (511) is connected to a screw drilling machine (52) via a drilling drive connecting plate (515).

8. The contaminated soil remediation system based on gas phase extraction and biopile coupling according to claim 1 is characterized in that: A negative pressure collection tank (23) is fixedly provided on the top of the gas phase extraction support plate (13), and a negative pressure collection air pump (231) is provided in communication with the negative pressure collection tank (23), and an input end of the negative pressure collection air pump (231) is in communication with the inside of the negative pressure collection tank (23) through a pipeline; The negative pressure collecting tank (23) is connected to the interior of the gas phase extraction cylinder shell (211) through a gas phase extraction main pipe (232), and a gas phase extraction control valve (2320) is provided on the gas phase extraction main pipe (232); The negative pressure collecting tank (23) is fixed with an exhaust gas discharge pipe (233) connected to the interior thereof, the exhaust gas discharge pipe (233) is connected to the input end of an exhaust gas discharge delivery pump (234), and the exhaust gas discharge pipe (233) is provided with an exhaust gas discharge control valve (2330); An impact negative pressure holding tank (24) is fixedly provided on the top of the gas phase extraction support plate (13), and an impact negative pressure suction pump (241) is provided in communication with the impact negative pressure holding tank (24), and an input end of the impact negative pressure suction pump (241) is in communication with the inside of the impact negative pressure holding tank (24) through a pipeline; The impact negative pressure holding tank (24) is connected to the interior of the impact extraction outer cylinder shell (221) via an impact extraction connecting pipe (242), and the impact extraction connecting pipe (242) is provided with an impact extraction control valve (2420); The impact negative pressure holding tank (24) is fixed with an impact discharge pipe (243) connected to the interior thereof. The impact discharge pipe (243) is also connected to the input end of the exhaust gas discharge delivery pump (234). The impact discharge pipe (243) is provided with an impact discharge control valve (2430).

9. The contaminated soil remediation system based on gas phase extraction and biopile coupling according to claim 1 is characterized in that: The ventilation branch pipe (321) is provided with a ventilation opening and closing mechanism (33), the ventilation opening and closing mechanism (33) comprising an opening and closing control pipe (331) rotatably connected to the ventilation branch pipe (321) and arranged coaxially therewith, and the opening and closing control pipe (331) has a plurality of exhaust matching holes (3310) extending radially therethrough on a side wall thereof; An opening and closing drive motor (332) is fixed inside the ventilation branch pipe (321) and is used to drive the opening and closing control pipe (331) to rotate around the axis of the ventilation branch pipe (321).

10. The contaminated soil remediation system based on gas phase extraction and biopile coupling according to claim 1 is characterized in that: A plurality of ventilation branch pipes (321) arranged in a circle around the ventilation main pipe (32) is counted as one group, and a plurality of groups of ventilation branch pipes (321) are arranged along the axial direction of the ventilation main pipe (32); The outer ends of two adjacent ventilation branch pipes (321) arranged along the axial direction of the ventilation main pipe (32) are connected via an adjacent connecting pipe (322); The ventilation collection pipe (32) is slidably connected with an adjacent control shaft (34) in the vertical direction. A plurality of adjacent communication control rings (341) are fixed in the ventilation collection pipe (32). A plurality of adjacent communication sealed disks (342) are fixed on the adjacent control shaft (34). The adjacent communication sealed disks (342) are sealed and matched in each of the adjacent communication control rings (341) in a one-to-one correspondence. The upper end of the ventilation manifold (32) is a sealing structure, and the upper end of the adjacent control shaft (34) extends to the outside of the ventilation manifold (32); A proximity control fixed cylinder (343) with an opening facing upward is fixed on the outer top of the ventilation manifold (32), a proximity control sliding cylinder (344) with an opening facing downward is slidably connected inside the proximity control fixed cylinder (343), and the outer end of the proximity control sliding cylinder (344) is fixedly connected to the upper end of the proximity control shaft (34); The proximity control fixed cylinder (343) is provided with a proximity control telescopic rod (345) for driving the proximity control sliding cylinder (344) to move up and down; The interior of the biopile support plate (31) is a hollow structure, and the lower end of the ventilation manifold (32) is connected to the interior of the biopile support plate (31); A ventilation input pipe (311) connected to the interior of the biopile support plate (31) is fixed on the outside of the biopile support plate (31), and a channel partition (312) spirally extending along a vertical axis is fixed inside the biopile support plate (31), and the channel partition (312) divides the interior of the biopile support plate (31) into an initial input channel, one end of the initial input channel is connected to the ventilation input pipe (311), and the other end of the initial input channel is connected to the lower end of the ventilation collection pipe (32); A balanced exhaust pipe (323) connected to the interior of the ventilation manifold (32) is fixed to the outer side of the upper end of the ventilation manifold (32), and the balanced exhaust pipe (323) is provided with a balanced exhaust control valve (3230).

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