Contaminated soil remediation system based on gas phase extraction and biopile coupling

Abstract

This invention discloses a contaminated soil remediation system based on the coupling of gas phase extraction and biomass, including a vehicle-mounted support mechanism, a gas phase extraction mechanism connected to the vehicle-mounted support mechanism, and a biomass treatment mechanism used in conjunction with the gas phase extraction mechanism. The vehicle-mounted support mechanism includes a vehicle-mounted support chassis, with multiple tracked drive wheel sets fixedly installed at the bottom of the chassis. A horizontally arranged gas phase extraction support plate is rotatably connected to the top of the vehicle-mounted support chassis. The gas phase extraction mechanism includes multiple gas phase extraction units connected to the top of the gas phase extraction support plate via support arm mechanisms. This invention has high-efficiency remediation capabilities. The simultaneous operation of multiple gas phase extraction units can more thoroughly extract volatile organic pollutants from the soil within a certain range. Furthermore, the impact extraction mechanism can extract volatile organic pollutants adsorbed deep in the soil, resulting in more thorough removal of volatile organic pollutants.

Description

Technical Field

[0001] This invention relates to the field of soil regeneration technology, specifically to a contaminated soil remediation system based on the coupling of gas phase extraction and biomass. Background Technology

[0002] Soil Vapor Extraction (SVE) is primarily used to remove volatile organic pollutants (VOCs) from soil. Under certain temperature and pressure conditions, VOCs in contaminated soil tend to transform from a liquid or solid state into a gaseous state. SVE technology involves installing extraction wells in the soil and using vacuum pumps or other air extraction equipment to generate negative pressure. Under this negative pressure, air is extracted from the soil pores, causing pollutants to volatilize from the surface of soil particles into the gas phase. For example, in oil-contaminated soil, light hydrocarbon pollutants such as benzene and toluene, which are highly volatile, are easily volatilized from the soil when negative pressure is generated in the extraction wells.

[0003] 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 soil is relatively low and needs further improvement and optimization. Summary of the Invention

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

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] The contaminated soil remediation system based on gas phase extraction and biomass coupling includes a vehicle-mounted support structure, a gas phase extraction mechanism connected to the vehicle-mounted support structure, and a biomass treatment mechanism used in conjunction with the gas phase extraction mechanism.

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

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

[0009] The gas phase extraction mechanism includes multiple gas phase extraction units connected to the top of the gas phase extraction support plate via a support arm mechanism.

[0010] The gas phase extraction unit includes 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 wall of the gas phase extraction shell and the outer wall of the additional support shell.

[0011] The bioreactor processing unit includes a bioreactor support plate, with a vertically extending ventilation manifold fixed to the top of the bioreactor support plate. Multiple ventilation branch pipes connected to the inside of the ventilation manifold are fixed to the outside of the ventilation manifold, and multiple ventilation and exhaust holes that communicate with the inside and outside are on the side wall of the ventilation branch pipes.

[0012] Preferably, the vehicle-mounted support chassis has a vertically penetrating turret support connection hole, and a turret support rotating ring is fixed at the lower end of the gas phase extraction support plate, the turret support rotating ring being 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 includes a static pressure ventilation support plate connected to the top of the gas phase extraction support plate through a static pressure drive 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 vent is pointed, and the upper end of the static pressure vent is connected to the atmosphere. The side wall of the static pressure vent is a porous, openwork structure that connects the inside and outside.

[0015] Preferably, the hydrostatic drive mechanism includes a hydrostatic drive support cylinder fixed to the top of the gas phase extraction support plate and extending vertically, a hydrostatic drive support column slidably connected inside the hydrostatic drive support cylinder, a vertically penetrating hydrostatic drive mating hole on the hydrostatic drive support column, a hydrostatic drive shaft threadedly connected to the hydrostatic drive mating hole, a hydrostatic drive receiving shell fixed to the top of the hydrostatic drive support cylinder, the upper end of the hydrostatic drive shaft extending into the hydrostatic drive receiving shell, and a hydrostatic drive motor for driving the hydrostatic drive shaft to rotate fixed inside the hydrostatic drive receiving shell;

[0016] The side wall of the static pressure drive support cylinder has a vertically extending static pressure moving channel that is open to both the inside and outside. The static pressure drive support column is fixedly connected to the static pressure ventilation support plate through the static pressure drive connecting plate.

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

[0018] Preferably, the gas phase extraction cylinder shell is provided with an impact extraction mechanism, which includes an impact extraction outer shell that is fixed inside the gas phase extraction cylinder shell and extends coaxially therewith, and an impact extraction inner shell that is slidably connected to the inner side wall of the impact extraction outer shell.

[0019] The outer shell of the impact extraction has multiple radially penetrating external impact extraction through holes on its side wall, and the inner shell of the impact extraction has multiple radially penetrating internal impact extraction through holes on its side wall.

[0020] An inner shell drive fixing cylinder with an upward opening is fixed at the bottom of the gas phase extraction cylinder shell. An inner shell drive sliding cylinder is slidably connected in the inner shell drive fixing cylinder. The outer end of the inner shell drive sliding cylinder is fixedly connected to the impact extraction inner shell.

[0021] The inner shell drive fixed cylinder is equipped with an inner shell drive telescopic rod for driving the inner shell drive sliding cylinder to move up and down.

[0022] Explanation: The impact extraction mechanism can generate impact pressure changes inside the outer shell of the impact extraction cylinder. Under the action of impact pressure changes, volatile organic pollutants adsorbed deep in the soil can be better extracted.

[0023] Preferably, the support arm mechanism includes a support arm connecting column that is fixedly connected to the top of the gas phase extraction support plate and extends vertically, a support arm connecting ring that is rotatably connected to the support arm connecting column, and a support arm main beam that is fixed to the outside of the support arm connecting ring.

[0024] The other end of the main beam of the support arm is fixed with a lifting unit connecting seat, a lifting unit connecting shaft is rotatably connected to the lifting unit connecting seat, and a lifting unit support plate is fixed on the lifting unit connecting 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 that is fixed on the extraction unit support plate and extends vertically. An extraction lifting and lowering drive column is slidably connected inside the extraction lifting and lowering support cylinder. The extraction lifting and lowering drive column has a vertically penetrating drive connection hole. An extraction lifting and lowering drive shaft is threadedly connected inside the drive connection hole. A lifting drive receiving shell is fixed at the top of the extraction lifting and lowering support cylinder. The upper end of the extraction lifting and lowering drive shaft extends into the lifting drive receiving shell. A lifting drive motor for driving the rotation of the extraction lifting and lowering drive shaft is fixed inside the lifting drive receiving shell.

[0026] The side wall of the extraction and lifting support cylinder has a vertically extending lifting and moving channel that is interconnected inside and out. The extraction and lifting drive column is fixedly connected to the gas phase extraction cylinder shell through the extraction and lifting connecting plate.

[0027] Note: The support arm connecting ring can move the gas phase extraction units together through the support arm main beam, extraction unit connecting seat and extraction unit support plate, so as to adjust the relative position between each gas phase extraction unit.

[0028] Preferably, the extraction unit support plate is provided with a drilling mechanism, which includes a drilling mechanism support cylinder fixed on the extraction unit support plate and extending vertically, and a drilling mechanism support column is slidably connected inside the drilling mechanism support cylinder.

[0029] The drilling mechanism support column has a vertically penetrating drilling drive mating hole. A drilling drive shaft is threadedly connected to the drilling drive mating hole. A drilling drive receiving shell is fixed at the top of the drilling mechanism support cylinder. The upper end of the drilling drive shaft extends into the drilling drive receiving shell. A drilling drive motor for driving the drilling drive shaft to rotate is fixed inside the drilling drive receiving shell.

[0030] The drilling mechanism support cylinder has a vertically extending drilling lifting channel that connects the inside and outside. The drilling mechanism support column is connected to a screw drilling machine through a drilling drive connecting plate.

[0031] Note: The drilling mechanism facilitates the rapid drilling of 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 connected to the negative pressure collection tank. The input end of the negative pressure collection pump is connected to the inside of the negative pressure collection tank through a pipe.

[0033] The negative pressure collection tank is connected to the inside of the gas phase extraction cylinder shell through the gas phase extraction manifold, and the gas phase extraction manifold is equipped with a gas phase extraction control valve.

[0034] The negative pressure collection tank is fixed with an exhaust pipe that is connected to its interior. The exhaust pipe is connected to the input end of an exhaust gas delivery pump and has an exhaust gas control valve.

[0035] An impact negative pressure containment tank is fixedly installed on the top of the gas phase extraction support plate. An impact negative pressure pump is connected to the impact negative pressure containment tank. The input end of the impact negative pressure pump is connected to the inside of the impact negative pressure containment tank through a pipeline.

[0036] The impact negative pressure containment tank is connected to the inside of the impact extraction outer shell through an impact extraction connecting pipe, and the impact extraction connecting pipe is equipped with an impact extraction control valve.

[0037] The impact negative pressure containment tank is fixed with an impact discharge pipe that is connected to its interior. The impact discharge pipe is also connected to the input end of the waste gas discharge pump. The impact discharge pipe is equipped with an impact discharge control valve.

[0038] Explanation: Under negative pressure, volatile organic pollutants in the soil will pass through the gas phase extraction cylinder shell and be transported through the gas phase extraction manifold into the negative pressure collection tank and collected.

[0039] Preferably, the ventilation manifold is provided with a ventilation opening and closing mechanism, which includes an opening and closing control pipe rotatably connected to and coaxially arranged with the ventilation manifold, and the side wall of the opening and closing control pipe has a plurality of exhaust mating holes that extend radially through it.

[0040] An opening and closing drive motor is fixed inside the ventilation manifold to drive the opening and closing control pipe to rotate around the axis of the ventilation manifold.

[0041] Note: The ventilation opening and closing mechanism facilitates the control of air supply to the soil.

[0042] Preferably, multiple ventilation branch pipes are arranged around the circumference of the ventilation main pipe and are counted as a group, and multiple groups of ventilation branch pipes are arranged along the axial direction of the ventilation main pipe.

[0043] The outer ends of two adjacent ventilation manifolds arranged along the axis of the ventilation manifold are connected by a nearby connecting pipe.

[0044] The ventilation manifold is slidably connected to a proximity control shaft in the vertical direction. Multiple proximity connection control rings are fixed inside the ventilation manifold. Multiple proximity connection sealing discs are fixed on the proximity control shaft. The proximity connection sealing discs are fitted one-to-one with each proximity connection control ring.

[0045] The upper end of the vent manifold is sealed, and the upper end near the control shaft extends to the outside of the vent manifold.

[0046] A proximity control fixed cylinder with an upward opening is fixed to the top of the outer side of the ventilation manifold. A proximity control sliding cylinder with a downward opening is slidably connected inside the proximity control fixed cylinder. The outer end of the proximity control sliding cylinder is fixedly connected to the upper end of the proximity control shaft.

[0047] The proximity control fixed cylinder is equipped with a proximity control telescopic rod for driving the proximity control sliding cylinder to move up and down;

[0048] The bioreactor support plate has a hollow structure inside, and the lower end of the ventilation manifold is connected to the inside of the bioreactor support plate.

[0049] A ventilation input pipe connected to the interior is fixed on the outside of the biomass support plate. A channel partition extending spirally along the vertical axis is fixed inside the biomass support plate. The channel partition divides the inside of the biomass 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 to the interior is fixed to the outer side of the upper end of the venting manifold, and the balanced exhaust pipe has a balanced exhaust control valve.

[0051] Explanation: By controlling the state of the ventilation opening and closing mechanism, and by using paired adjacent connecting sealed discs and adjacent connecting control rings to segment and isolate the inside of the ventilation manifold, it is easy to control the gas flow path, thereby regulating the soil internal temperature in the form of hot air and ensuring a more uniform heat exchange process.

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

[0053] 1. The present invention has a reasonable structural design and has a high efficiency of remediation. The simultaneous operation of multiple gas phase extraction units can more thoroughly extract volatile organic pollutants from the soil within a certain range. Furthermore, the impact extraction mechanism can extract volatile organic pollutants adsorbed deep in the soil, making the removal of volatile organic pollutants more thorough.

[0054] 2. This invention is easy to operate and, when used with a biomass treatment mechanism, can continuously degrade residual pollutants. The biomass treatment mechanism has a network of ventilation pipes, which can not only provide sufficient oxygen for microorganisms, but also regulate the temperature inside the soil through heat exchange to maintain the good activity of 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 the area enclosed by each gas phase extraction unit, which is conducive to the better lateral migration of volatile organic pollutants in the soil.

[0056] 4. This invention has wide applicability and is applicable to a variety of pollutants, including petroleum hydrocarbons, volatile organic compounds (such as benzene series and chlorinated hydrocarbons), pesticide residues, etc. In chemically contaminated sites, multiple organic pollutants may coexist, and this system can treat these complex combinations of pollutants.

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

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

[0059] 7. During the bioreactor remediation process of this invention, the activities of microorganisms can decompose organic pollutants and produce organic matter such as humus, which increases soil fertility. The polysaccharides and other substances produced by microorganisms during metabolism help soil particles aggregate, improve soil structure, increase soil porosity, and are beneficial to plant growth and the reconstruction of soil ecosystem. Attached Figure Description

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

[0061] Figure 2 yes Figure 1 Top view;

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

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

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

[0065] Figure 6 This is a schematic diagram of the biomass processing mechanism of the present invention;

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

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

[0068] Figure 9 This is a schematic diagram of the proximity control fixed cylinder of the present invention.

[0069] In the diagram, 10-Vehicle-mounted support mechanism, 11-Vehicle-mounted 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 fixing cylinder, 224-Inner shell drive sliding cylinder, 225-Inner shell drive telescopic rod, 23-Negative pressure collection tank, 231-Negative pressure collection pump 232-Gas phase extraction main pipe, 2320-Gas phase extraction control valve, 233-Waste gas discharge pipe, 2330-Waste gas discharge control valve, 234-Waste gas discharge transfer pump, 24-Impact negative pressure containment tank, 241-Impact negative pressure suction pump, 242-Impact extraction connecting pipe, 2420-Impact extraction control valve, 243-Impact discharge pipe, 2430-Impact discharge 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 channel, 262-Static pressure drive support column, 2620-Static pressure drive mating hole, 263-Static pressure drive shaft, 264-Static pressure drive containment shell, 265-Static pressure 266-Static pressure drive motor, 30-Bioreactor processing mechanism, 31-Bioreactor support plate, 311-Ventilation input pipe, 312-Channel partition, 32-Ventilation main pipe, 321-Ventilation branch pipe, 3210-Ventilation exhaust port, 322-Proximity connecting pipe, 323-Balance exhaust pipe, 3230-Balance exhaust control valve, 33-Ventilation opening and closing mechanism, 331-Opening and closing control pipe, 3310-Exhaust mating hole, 332-Opening and closing drive motor, 34-Proximity control shaft, 341-Proximity connecting control ring, 342-Proximity connecting sealed plate, 343-Proximity control fixed cylinder, 344-Proximity control sliding cylinder, 345-Proximity control telescopic rod, 41-Support arm mechanism, 411-Support arm connection Column, 412-Support arm connecting ring, 413-Support arm main beam, 42-Lifting unit connecting seat, 421-Lifting unit connecting shaft, 422-Lifting unit support plate, 43-Lifting and lowering mechanism, 431-Lifting and lowering support cylinder, 4310-Lifting and moving through slot, 432-Lifting and lowering drive column, 4320-Drive connecting hole, 433-Lifting and lowering drive shaft, 434-Lifting drive receiving shell, 435-Lifting drive motor, 436-Lifting and lowering connecting plate, 50-Drilling mechanism, 51-Drilling mechanism support cylinder, 510-Drilling lifting through slot, 511-Drilling mechanism support column, 5110-Drilling drive mating hole, 512-Drilling drive shaft, 513-Drilling drive receiving shell, 514-Drilling drive motor,515 - Drilling drive connecting plate; 52 - Screw drilling machine. Detailed Implementation

[0070] The following combination Figures 1-9 The present invention will be described in detail. For ease of description, the orientations mentioned below are defined as follows: The directions of up, down, left, right, front, and back mentioned below are consistent with the directions of up, down, left, right, front, and back in the projection relationship of the respective main view or structural schematic diagram.

[0071] Example 1: A contaminated soil remediation system based on the coupling of gas-phase extraction and biomass, 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 biomass processing 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 multiple tracked drive wheel sets 12 are fixedly installed at the bottom of the vehicle-mounted support chassis 11.

[0073] The tracked drive wheel assembly 12 is a prior art tracked drive wheel assembly driven by an electric motor. The suspension support structure of the tracked drive wheel assembly 12 is fixedly connected to the bottom of the vehicle support chassis 11.

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

[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 via 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 side wall of the gas phase extraction shell 211 and the outer side wall of the additional support shell 212.

[0077] Both the sidewalls of the gas phase extraction shell 211 and the auxiliary support shell 212 are porous hollow structures with internal and external connections.

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

[0079] like Figure 6As shown, the biomass processing mechanism 30 includes a biomass support plate 31. A vertically extending ventilation manifold 32 is fixed to the top of the biomass support plate 31. Multiple ventilation branch pipes 321 connected to the outside of the ventilation manifold 32 are fixed to the outside of the ventilation manifold 32. Multiple ventilation and exhaust holes 3210 that communicate with the inside are provided on the side wall of the ventilation branch pipes 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 at the lower end of the gas phase extraction support plate 13. 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. 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. The impact extraction mechanism 22 includes an impact extraction outer shell 221 that is fixed inside the gas phase extraction shell 211 and extends coaxially therewith. An impact extraction inner shell 222 is slidably connected to the inner wall of the impact extraction outer shell 221.

[0083] The inner shell 222 of the impact extraction can only slide along the axial direction of the outer shell 221 of the impact extraction.

[0084] The outer shell 221 of the impact extraction has multiple radially penetrating external impact extraction through holes 2210 on its side wall, and the inner shell 222 of the impact extraction has multiple radially penetrating internal impact extraction through holes 2220 on its side wall.

[0085] A gas phase extraction cylinder shell 211 has an inner shell drive fixing cylinder 223 with an upward opening fixed at the bottom. An inner shell drive sliding cylinder 224 is slidably connected in the inner shell drive fixing cylinder 223. The outer end of the inner shell drive sliding cylinder 224 is fixedly connected to the impact extraction inner shell shell 222.

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

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

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

[0089] Example 2: Based on Example 1, such as Figure 1 As shown, the support arm mechanism 41 includes a support arm connecting column 411 that is fixedly connected to the top of the gas phase extraction support plate 13 and extends 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 outside of the support arm connecting ring 412.

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

[0091] The other end of the main beam 413 of the support arm is fixed with a lifting unit connecting seat 42, a lifting unit connecting shaft 421 is rotatably connected to the lifting unit connecting seat 42, and a lifting unit support plate 422 is fixed on the lifting unit connecting shaft 421.

[0092] The extraction unit connecting shaft 421 is driven by a prior art servo motor fixed on the extraction unit connecting seat 42 to rotate about 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 the extraction lifting and lowering mechanism 43. The extraction lifting and lowering mechanism 43 includes an extraction lifting and lowering support cylinder 431 that is fixed on the extraction unit support plate 422 and extends vertically. An extraction lifting and lowering drive column 432 is slidably connected inside the extraction lifting and lowering support cylinder 431. The extraction lifting and lowering drive column 432 has a vertically penetrating drive connection hole 4320. An extraction lifting and lowering drive shaft 433 is threadedly connected inside the drive connection hole 4320. A lifting drive receiving shell 434 is fixed at the top of the extraction lifting and lowering support cylinder 431. The upper end of the extraction lifting and lowering drive shaft 433 extends into the lifting drive receiving shell 434. A lifting drive motor 435 for driving the extraction lifting and lowering drive shaft 433 to rotate is fixed inside the lifting drive receiving shell 434.

[0094] The lifting drive motor 435 is a servo motor of the prior art. 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 and lifting support cylinder 431 has a vertically extending lifting and moving channel 4310 that is connected to the inside and outside. The extraction and lifting drive column 432 is fixedly connected to the gas phase extraction cylinder shell 211 through the extraction and lifting connecting plate 436.

[0096] Example 3: Based on Example 2, such as Figure 1 As shown, the gas phase extraction support plate 13 has a vertically penetrating central through hole 130. 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 via a static pressure drive mechanism 26. The static pressure ventilation support plate 251 is located directly above the central through hole 130. 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 vent pipe 250 is pointed, the upper end of the static pressure vent pipe 250 is connected to the atmosphere, and the side wall of the static pressure vent pipe 250 is a porous hollow structure with internal and external connections.

[0098] The static pressure drive mechanism 26 includes a static pressure drive support cylinder 261 that is fixed to the top of the gas phase extraction support plate 13 and extends vertically. A static pressure drive support column 262 is slidably connected inside the static pressure drive support cylinder 261. The static pressure drive support column 262 has a vertically penetrating static pressure drive mating hole 2620. A static pressure drive shaft 263 is threadedly connected to the static pressure drive mating hole 2620. A static pressure drive receiving shell 264 is fixed to 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 receiving shell 264. A static pressure drive motor 265 for driving the static pressure drive shaft 263 to rotate is fixed inside the static pressure drive receiving shell 264.

[0099] The hydrostatic drive motor 265 is a servo motor of the prior art. The output shaft of the hydrostatic drive motor 265 is connected to the upper end of the hydrostatic drive shaft 263 through a coupling.

[0100] The side wall of the static pressure drive support cylinder 261 has a vertically extending static pressure moving channel 2610 that is interconnected internally and externally, and the static pressure drive support column 262 is fixedly connected to the static pressure ventilation support plate 251 through the static pressure drive connecting plate 266.

[0101] Example 4: Based on Example 3, such as Figure 5 As shown, a drilling mechanism 50 is provided on the extraction unit support plate 422. The drilling mechanism 50 includes a drilling mechanism support cylinder 51 that is fixed on the extraction unit support plate 422 and extends vertically. A drilling mechanism support column 511 is slidably connected inside the drilling mechanism support cylinder 51.

[0102] The drilling mechanism support column 511 has a vertically penetrating drilling drive mating hole 5110. The drilling drive mating hole 5110 is internally threaded to a drilling drive shaft 512. A drilling drive receiving shell 513 is fixed at the top of the drilling mechanism support cylinder 51. The upper end of the drilling drive shaft 512 extends into the drilling drive receiving shell 513. A drilling drive motor 514 for driving the drilling drive shaft 512 to rotate is fixed inside the drilling drive receiving shell 513.

[0103] The drilling drive motor 514 is a servo motor of the prior art. The output shaft of the drilling drive motor 514 is connected to the upper end of the drilling drive shaft 512 through a coupling.

[0104] The drilling mechanism support cylinder 51 has a drilling lifting channel 510 that is vertically extended and communicates with the inside and outside. 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 conventional spiral drill rod type drilling machine.

[0106] Example 5: Based on Example 4, such as Figure 2 As shown, 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 pump 231 is connected to the negative pressure collection tank 23. The input end of the negative pressure collection pump 231 is connected to the inside of the negative pressure collection tank 23 through a pipe.

[0107] The negative pressure collection tank 23 is connected to the inside of the gas phase extraction shell 211 through the gas phase extraction manifold 232, and the gas phase extraction manifold 232 has a gas phase extraction control valve 2320.

[0108] The negative pressure collection tank 23 is fixed with an exhaust pipe 233 that is connected to its interior. The exhaust pipe 233 is connected to the input end of an exhaust gas delivery pump 234. The exhaust pipe 233 has an exhaust gas control valve 2330.

[0109] A negative pressure containment tank 24 is fixedly provided on the top of the gas phase extraction support plate 13. A negative pressure air pump 241 is connected to the negative pressure containment tank 24. The input end of the negative pressure air pump 241 is connected to the inside of the negative pressure containment tank 24 through a pipe.

[0110] The impact negative pressure containment tank 24 is connected to the inside of the impact extraction outer shell 221 through the impact extraction connecting pipe 242, and the impact extraction connecting pipe 242 has an impact extraction control valve 2420.

[0111] The impact negative pressure containment tank 24 is fixed with an impact discharge pipe 243 that is connected to its interior. The impact discharge pipe 243 is also connected to the input end of the waste gas discharge pump 234. The impact discharge pipe 243 has an impact discharge control valve 2430.

[0112] Example 6: Based on Example 5, such as Figure 8 As shown, the ventilation manifold 321 is provided with a ventilation opening and closing mechanism 33. The ventilation opening and closing mechanism 33 includes an opening and closing control pipe 331 that is rotatably connected to the ventilation manifold 321 and arranged coaxially with it. The opening and closing control pipe 331 has a plurality of exhaust mating holes 3310 that extend radially through it on its side wall.

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

[0114] When the opening and closing control tube 331 rotates, and each exhaust mating hole 3310 is connected to each ventilation and exhaust hole 3210 in a one-to-one correspondence, the ventilation opening and closing mechanism 33 is in the "open state".

[0115] When each exhaust mating hole 3310 and each vent exhaust hole 3210 are misaligned and isolated from each other, the vent opening and closing mechanism 33 is in the "closed state".

[0116] like Figure 6 As shown, multiple ventilation branch pipes 321 are arranged around the circumference of the ventilation main pipe 32, which is called a group. Multiple 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 branches 321 arranged along the axial direction of the ventilation manifold 32 are connected by a nearby connecting pipe 322.

[0118] A proximity control shaft 34 is slidably connected in the vertical direction inside the ventilation manifold 32. Multiple proximity communication control rings 341 are fixed inside the ventilation manifold 32. Multiple proximity communication sealing discs 342 are fixed on the proximity control shaft 34. The proximity communication sealing discs 342 are sealed and fitted one-to-one with each proximity communication control ring 341.

[0119] The upper end of the ventilation manifold 32 is a sealed structure, and the upper end near the control shaft 34 extends to the outside of the ventilation manifold 32.

[0120] like Figure 9As shown, an upward-opening proximity control fixed cylinder 343 is fixed to the top of the outer side of the ventilation manifold 32, and an downward-opening proximity control sliding cylinder 344 is slidably connected inside the proximity control fixed cylinder 343. The outer end of the proximity control sliding cylinder 344 is fixedly connected to the upper end of the proximity control shaft 34.

[0121] 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 proximity control telescopic rod 345 is an existing electric telescopic rod. 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 biomass support plate 31 has a hollow structure inside, and the lower end of the ventilation manifold 32 is connected to the inside of the biomass support plate 31.

[0123] A ventilation input pipe 311 connected to the outside of the biomass support plate 31 is fixed to the outside of the biomass support plate 31. A channel partition 312 extending spirally along the vertical axis is fixed inside the biomass support plate 31. The channel partition 312 divides the inside of the biomass 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 is fixed to the outer side of the upper end of the venting manifold 32, 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 biomass coupling. Based on the contaminated soil remediation system based on gas-phase extraction and biomass coupling described in Example 1 above, it includes the following steps:

[0126] S1. Driven by the tracked drive wheel set 12, the entire system is moved to the area to be repaired and each gas phase extraction unit 21 is evenly distributed around the vehicle support chassis 11.

[0127] S2. Using existing drilling equipment, drill a deep hole on the ground for gas phase extraction, and then place the gas phase extraction unit 21 into the deep hole to perform gas phase extraction operation.

[0128] S3. Use the impact extraction mechanism 22 to extract volatile organic pollutants from the soil;

[0129] The impact extraction mechanism 22 can generate impact-changing air pressure inside the impact extraction outer cylinder shell 221. Under the action of impact-changing air pressure, volatile organic pollutants adsorbed in the deep soil layer can be better extracted.

[0130] S4. The extracted soil is then subjected to microbial fermentation treatment using the bio-pile treatment unit 30.

[0131] The extracted soil is crushed and mixed with fermentation bacteria, Pseudomonas aeruginosa, at a dosage of 5g / kg.

[0132] Soil mixed with fermentation bacteria is piled on a biomass support plate 31. Air is pumped into the biomass support plate 31 using an existing air delivery pump. The air inside the biomass support plate 31 enters the ventilation manifold 32 and is then distributed to each ventilation branch pipe 321 to provide oxygen for the microorganisms inside the soil and carry out microbial fermentation treatment.

[0133] Example 8: This example describes a contaminated soil remediation method based on gas phase extraction and biomass coupling. The contaminated soil remediation system based on gas phase extraction and biomass coupling in Example 2 differs from Example 7 in 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 then 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, thereby adjusting the relative positions between each gas phase extraction unit 21.

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

[0136] Driven by the extraction lifting mechanism 43, the gas phase extraction cylinder shell 211 extends into the deep hole and performs gas phase extraction on the contaminated soil under negative pressure.

[0137] The output shaft of the lifting drive motor 435 drives the extraction and lifting drive shaft 433 to rotate. Under the threaded transmission, the extraction and lifting drive shaft 433 drives the extraction and lifting drive column 432 to move down inside the extraction and lifting support cylinder 431. The extraction and lifting drive column 432 drives the gas phase extraction cylinder shell 211 to move down together through the extraction and lifting connecting 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 convex sealing ring that can fit tightly against the opening of the deep hole.

[0139] Example 9: This example describes a contaminated soil remediation method based on gas phase extraction and biomass coupling. Based on the contaminated soil remediation system based on gas phase extraction and biomass coupling in Example 3 above, the difference from Example 8 is that in step S1, a static pressure ventilation pipe 250 connected to the outside atmosphere is inserted at the center of each gas phase extraction unit 21 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 threaded transmission, the static pressure drive shaft 263 drives the static pressure drive support column 262 to move downward inside the static pressure drive support cylinder 261. The static pressure drive support column 262 then drives the static pressure ventilation support plate 251 and the static pressure ventilation pipe 250 to move downward together 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] Example 10: This example describes a contaminated soil remediation method based on gas phase extraction and biomass coupling. Based on the contaminated soil remediation system based on gas phase extraction and biomass coupling in Example 4 above, the difference from Example 9 is that in step S2, a drilling mechanism 50 is used to drill a deep hole for gas phase extraction on the ground. First, the screw drilling machine 52 is started. The output shaft of the drilling drive motor 514 drives the drilling drive shaft 512 to rotate. Under the screw transmission, the drilling drive shaft 512 drives the drilling mechanism support column 511 to move down in the drilling mechanism support cylinder 51. The drilling mechanism support column 511 drives the screw drilling machine 52 to move down together through the drilling drive connecting plate 515. The screw drilling machine 52 uses the spiral drill rod to drill a deep hole on the ground.

[0142] Then the output shaft of the drilling drive motor 514 reverses and drives the screw drill 52 to move upward together 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] Example 11: This example describes a contaminated soil remediation method based on gas phase extraction and biomass coupling. It is based on the contaminated soil remediation system based on gas phase extraction and biomass coupling in Example 5 above. The difference from Example 10 is that in step S2, a negative pressure collection pump 231 is used to evacuate the inside of the negative pressure collection tank 23 until the pressure inside the negative pressure collection tank 23 reaches 10... -2 Stop after Pa, open the gas phase extraction control valve 2320; 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, volatile organic pollutants in the soil will pass through the gas phase extraction shell 211 and enter the interior of the negative pressure collection tank 23 through the transmission action of the gas phase extraction main pipe 232.

[0144] Existing exhaust gas treatment equipment used in conjunction with this system is capable of purifying volatile organic pollutants in the soil;

[0145] Once the air pressure inside the negative pressure collection tank 23 is balanced with the outside air, the gas phase extraction control valve 2320 is closed, the waste gas discharge pump 234 is started and the waste gas discharge control valve 2330 is opened, and the waste gas collected in the negative pressure collection tank 23 is transported to the existing tail gas treatment equipment for purification.

[0146] Then, the vacuum collection tank 23 is repeatedly evacuated to continue collecting volatile organic pollutants from the soil under negative pressure.

[0147] Example 12: This example describes a contaminated soil remediation method based on gas phase extraction and biomass coupling. It is based on the contaminated soil remediation system based on gas phase extraction and biomass coupling in Example 5 above. The difference from Example 11 is that in step S3, the impingement negative pressure vacuum pump 241 is first used to evacuate the inside of the impingement negative pressure container 24. The vacuum is maintained until the pressure inside the impingement negative pressure container 24 reaches 10... -2 After Pa, stop and open the impact extraction control valve 2420 to connect the impact negative pressure container 24 to the inside of the impact extraction outer shell 221 through the impact extraction connecting pipe 242.

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

[0149] When the inner through holes 2220 and the outer through holes 2210 of each impact extraction are misaligned and isolated from each other, the impact extraction mechanism 22 is set to be in the "closed state".

[0150] Then, driven by the reciprocating extension and retraction of the inner rod of the inner shell drive telescopic rod 225, 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 cycles back and forth between the "open state" and the "closed state".

[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. Then, under the action of the impact changing air pressure, the volatile organic pollutants adsorbed in the deep soil layer are extracted and transported to the impact negative pressure container tank 24 by the impact extraction connecting pipe 242.

[0152] Once the air pressure inside the impact negative pressure containment tank 24 is balanced with the outside air pressure, the impact extraction control valve 2420 is closed, the waste gas discharge pump 234 is started and the impact discharge control valve 2430 is opened, and the waste gas collected in the impact negative pressure containment tank 24 is transported to the existing tail gas treatment equipment for purification treatment.

[0153] Example 13: This example describes a contaminated soil remediation method based on gas phase extraction and biomass coupling. It is based on the contaminated soil remediation system based on gas phase extraction and biomass coupling in Example 6 above. The difference from Example 12 is that it also includes step S5.

[0154] S5. Fermentation temperature control:

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

[0156] When the opening and closing control tube 331 rotates, and each exhaust mating hole 3310 is connected to each ventilation and exhaust hole 3210 in a one-to-one correspondence, the ventilation opening and closing mechanism 33 is in the "open state".

[0157] When each exhaust mating hole 3310 and each vent exhaust hole 3210 are misaligned and isolated from each other, the vent opening and closing mechanism 33 is in the "closed state".

[0158] Furthermore, driven by the proximity control telescopic rod 345, the proximity control shaft 34 moves down, causing the proximity connecting sealing disc 342 to be sealed and fitted one-to-one within each proximity connecting control ring 341, thus isolating the interior of the ventilation manifold 32 in segments.

[0159] When it is necessary to regulate the temperature inside the soil, the ventilation opening and closing mechanism 33 is in the "closed state". The existing air delivery pump delivers hot air into the biomass 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 biomass support plate 31 enters the ventilation main pipe 32 and passes through each ventilation branch pipe 321 from bottom to top, so that the hot air can fully exchange heat with the soil, regulate the soil temperature, and improve the activity of microorganisms.

[0160] The multiple sets of ventilation manifolds 321 arranged along the axial direction of the ventilation manifold 32 are numbered from bottom to top as L1, L2, L3, L4...Ln;

[0161] The outer ends of L1 and L2 are connected one-to-one by adjacent connecting pipe 322;

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

[0163] The adjacent connecting sealed disks 342 and adjacent connecting control rings 341 used in pairs are numbered from bottom to top as Z1, Z2, Z3, Z4...Zn;

[0164] Z1 is positioned between L1 and L2 within 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 is positioned between L3 and L4 within 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 dosage 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 dosage 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 in a mass ratio of 1:2, and the dosage is 30g / Kg.

Claims

1. A contaminated soil remediation system based on gas-phase extraction and biomass stack coupling, characterized in that, It includes a vehicle-mounted support mechanism (10), a gas phase extraction mechanism (20) connected to the vehicle-mounted support mechanism (10), and a biomass processing mechanism (30) used in conjunction with the gas phase extraction mechanism (20). The vehicle-mounted support mechanism (10) includes a vehicle-mounted support chassis (11), and multiple tracked drive wheel sets (12) are fixedly installed at 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) includes 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) 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 side wall of the gas phase extraction shell (211) and the outer side wall of the additional support shell (212). 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 drive mechanism (26). A vertically extending static pressure ventilation pipe (250) is fixed on the static pressure ventilation support plate (251). The lower end of the static pressure vent pipe (250) is a pointed tip, the upper end of the static pressure vent pipe (250) is connected to the atmosphere, and the side wall of the static pressure vent pipe (250) is a porous hollow structure with internal and external connections. The gas phase extraction shell (211) is provided with an impact extraction mechanism (22). The impact extraction mechanism (22) includes an impact extraction outer shell (221) that is fixed inside the gas phase extraction shell (211) and extends coaxially therewith. An impact extraction inner shell (222) is slidably connected to the inner side wall of the impact extraction outer shell (221). The outer shell (221) of the impact extraction has multiple radially penetrating external impact extraction through holes (2210) on its side wall, and the inner shell (222) of the impact extraction has multiple radially penetrating internal impact extraction through holes (2220) on its side wall. The bottom of the gas phase extraction cylinder shell (211) is fixed with an upper-facing inner shell drive fixing cylinder (223). An inner shell drive sliding cylinder (224) is slidably connected in the inner shell drive fixing cylinder (223). The outer end of the inner shell drive sliding cylinder (224) is fixedly connected to the impact extraction inner shell shell (222). The inner shell drive fixed cylinder (223) is provided with an inner shell drive telescopic rod (225) for driving the inner shell drive sliding cylinder (224) to move up and down; The biomass processing mechanism (30) includes a biomass support plate (31), and a vertically extending ventilation manifold (32) is fixed on the top of the biomass support plate (31). Multiple ventilation branch pipes (321) connected to the outside of the ventilation manifold (32) are fixed on the outside of the ventilation manifold (32). Multiple ventilation and exhaust holes (3210) with internal and external communication are provided on the side wall of the ventilation branch pipe (321).

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

3. The contaminated soil remediation system based on gas-phase extraction and biomass coupling according to claim 1, characterized in that, The static pressure drive mechanism (26) includes a static pressure drive support cylinder (261) fixed to the top of the gas phase extraction support plate (13) and extending vertically. A static pressure drive support column (262) is slidably connected inside the static pressure drive support cylinder (261). The static pressure drive support column (262) has a vertically penetrating static pressure drive mating hole (2620). A static pressure drive shaft (263) is threadedly connected in the static pressure drive mating hole (2620). A static pressure drive receiving shell (264) is fixed to 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 receiving shell (264). A static pressure drive motor (265) for driving the static pressure drive shaft (263) to rotate is fixed inside the static pressure drive receiving shell (264). The side wall of the static pressure drive support cylinder (261) has a vertically extending static pressure moving channel (2610) that is interconnected inside and out. The static pressure drive support column (262) is fixedly connected to the static pressure ventilation support plate (251) through the static pressure drive connecting plate (266).

4. The contaminated soil remediation system based on gas-phase extraction and biomass coupling according to claim 1, characterized in that, The support arm mechanism (41) includes a support arm connecting column (411) that is fixedly connected to the top of the gas phase extraction support plate (13) and extends 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 outside of the support arm connecting ring (412). The other end of the main beam (413) of the support arm is fixed with a lifting unit connecting seat (42), and a lifting unit connecting shaft (421) is rotatably connected to the lifting unit connecting seat (42). A lifting unit support plate (422) is fixed on the lifting unit connecting shaft (421). The gas phase extraction cylinder shell (211) is connected to the extraction unit support plate (422) through the extraction lifting and lowering mechanism (43). The extraction lifting and lowering mechanism (43) includes an extraction lifting and lowering support cylinder (431) that is fixed on the extraction unit support plate (422) and extends vertically. An extraction lifting and lowering drive column (432) is slidably connected inside the extraction lifting and lowering support cylinder (431). The extraction lifting and lowering drive column (432) has a vertically penetrating drive connection hole (4320). An extraction lifting and lowering drive shaft (433) is threadedly connected inside the drive connection hole (4320). A lifting drive receiving shell (434) is fixed at the top of the extraction lifting and lowering support cylinder (431). The upper end of the extraction lifting and lowering drive shaft (433) extends into the lifting drive receiving shell (434). A lifting drive motor (435) for driving the extraction lifting and lowering drive shaft (433) to rotate is fixed inside the lifting drive receiving shell (434). The side wall of the extraction and lifting support cylinder (431) has a vertically extending lifting and moving channel (4310) that is interconnected inside and out. The extraction and lifting drive column (432) is fixedly connected to the gas phase extraction cylinder shell (211) through the extraction and lifting connecting plate (436).

5. The contaminated soil remediation system based on gas-phase extraction and biomass coupling according to claim 1, characterized in that, The extraction unit support plate (422) is provided with a drilling mechanism (50), which 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 inside the drilling mechanism support cylinder (51). The drilling mechanism support column (511) has a vertically penetrating drilling drive mating hole (5110), and a drilling drive shaft (512) is threadedly connected to the drilling drive mating hole (5110). A drilling drive receiving shell (513) is fixed at 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 receiving shell (513). A drilling drive motor (514) for driving the drilling drive shaft (512) to rotate is fixed inside the drilling drive receiving shell (513). The drilling mechanism support cylinder (51) has a drilling lifting channel (510) that is vertically extended and communicates with the inside and outside. The drilling mechanism support column (511) is connected to a screw drilling machine (52) through a drilling drive connecting plate (515).

6. The contaminated soil remediation system based on gas-phase extraction and biomass coupling according to claim 1, characterized in that, The top of the gas phase extraction support plate (13) is fixedly provided with a negative pressure collection container (23), and a negative pressure collection pump (231) is connected to the negative pressure collection container (23). The input end of the negative pressure collection pump (231) is connected to the inside of the negative pressure collection container (23) through a pipe. The negative pressure collection tank (23) is connected to the interior of the gas phase extraction cylinder shell (211) through the gas phase extraction manifold (232), and the gas phase extraction manifold (232) is equipped with a gas phase extraction control valve (2320). The negative pressure collection tank (23) is fixed with an exhaust gas pipe (233) that is connected to its interior. The exhaust gas pipe (233) is connected to the input end of an exhaust gas delivery pump (234). The exhaust gas pipe (233) has an exhaust gas control valve (2330). The top of the gas phase extraction support plate (13) is fixedly provided with an impact negative pressure container (24), and an impact negative pressure pump (241) is connected to the impact negative pressure container (24). The input end of the impact negative pressure pump (241) is connected to the inside of the impact negative pressure container (24) through a pipe. The impact negative pressure container (24) is connected to the inside of the impact extraction outer shell (221) through the impact extraction connecting pipe (242), and the impact extraction connecting pipe (242) is equipped with an impact extraction control valve (2420). The impact negative pressure containment tank (24) is fixed with an impact exhaust pipe (243) that communicates with its interior. The impact exhaust pipe (243) is also connected to the input end of the exhaust gas delivery pump (234). The impact exhaust pipe (243) has an impact exhaust control valve (2430).

7. The contaminated soil remediation system based on gas-phase extraction and biomass coupling according to claim 1, characterized in that, The ventilation manifold (321) is provided with a ventilation opening and closing mechanism (33), which includes an opening and closing control pipe (331) rotatably connected to the ventilation manifold (321) and coaxially arranged therewith. The opening and closing control pipe (331) has a plurality of exhaust mating holes (3310) that extend radially through it on its side wall. An opening and closing drive motor (332) for driving the opening and closing control pipe (331) to rotate around the axis of the opening and closing pipe (321) is fixed inside the ventilation manifold (321).

8. The contaminated soil remediation system based on gas-phase extraction and biomass coupling according to claim 1, characterized in that, Multiple ventilation branch pipes (321) arranged around the circumference of the ventilation main pipe (32) are called a group, and multiple 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 branches (321) arranged along the axial direction of the ventilation manifold (32) are connected by a nearby connecting pipe (322); The ventilation manifold (32) is slidably connected to a proximity control shaft (34) in the vertical direction. Multiple proximity communication control rings (341) are fixed inside the ventilation manifold (32). Multiple proximity communication sealing discs (342) are fixed on the proximity control shaft (34). The proximity communication sealing discs (342) are fitted one-to-one with each of the proximity communication control rings (341). The upper end of the ventilation manifold (32) is a sealed structure, and the upper end of the adjacent control shaft (34) extends to the outside of the ventilation manifold (32); The top of the outer side of the ventilation manifold (32) is fixed with an upward-facing proximity control fixing cylinder (343), and an downward-facing proximity control sliding cylinder (344) is slidably connected inside the proximity control fixing cylinder (343). 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 biomass support plate (31) has a hollow structure inside, and the lower end of the ventilation manifold (32) is connected to the inside of the biomass support plate (31). The biomass support plate (31) is fixed with an air inlet pipe (311) that communicates with its interior. The biomass support plate (31) is fixed with a channel partition (312) that extends spirally along the vertical axis. The channel partition (312) divides the interior of the biomass support plate (31) into an initial input channel. One end of the initial input channel is connected to the air inlet pipe (311), and the other end of the initial input channel is connected to the lower end of the air collection pipe (32). The upper outer side of the ventilation manifold (32) is fixed with a balanced exhaust pipe (323) that communicates with its interior, and the balanced exhaust pipe (323) has a balanced exhaust control valve (3230).

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