Petroleum type polluted underground water remediation equipment and remediation method

Abstract

The invention discloses petroleum polluted groundwater remediation equipment and a remediation method. The equipment comprises an extraction well communicated with groundwater, and an air flotation treatment mechanism, an adsorption treatment mechanism and a microbiological treatment mechanism which are connected with the extraction well, an extraction delivery pump is fixed in the extraction well, and the input end of the extraction delivery pump is communicated with underground water; the air floatation treatment mechanism comprises an air floatation treatment accommodating barrel shell which is fixed on the ground and vertically extends, a rotary aeration mechanism is arranged at the bottom in the air floatation treatment accommodating barrel shell, a centrifugal stirring mechanism is arranged in the air floatation treatment accommodating barrel shell, and an air floatation discharge mechanism is arranged at the top of the air floatation treatment accommodating barrel shell; the remediation equipment has high purification efficiency and can treat a large amount of polluted underground water in a short time, so that the concentration of petroleum pollutants in the underground water is reduced as soon as possible, and the pollution diffusion range is reduced; through cooperative treatment of air floatation treatment, adsorption treatment, microbial purification treatment and the like, it is ensured that purified underground water meets the recycling or discharging requirement.

Description

Technical Field

[0001] The present invention relates to the technical field of groundwater treatment, and in particular to a device and method for repairing petroleum-contaminated groundwater. Background Art

[0002] Petroleum contamination of groundwater refers to the pollution of groundwater caused by petroleum and its products entering the groundwater system through various channels during the process of extraction, storage, transportation, and use. For example, petroleum substances penetrate into groundwater through soil pores, such as leakage from underground oil storage tanks at gas stations and improper wastewater discharge from petrochemical enterprises. Petroleum substances will gradually migrate downward under the action of gravity, pass through the vadose zone and enter the aquifer, polluting the groundwater. For example, if industrial wastewater containing petroleum pollutants or contaminated river water is used for irrigation, petroleum substances will seep into the ground with the irrigation water, thereby polluting the groundwater.

[0003] Existing measures for the treatment of petroleum-contaminated groundwater are often relatively simple and have poor treatment effects. It is difficult to completely and effectively separate and remove petroleum pollutants in groundwater, and further improvement and optimization are needed. Summary of the Invention

[0004] The purpose of the present invention is to provide a petroleum-contaminated groundwater remediation device and a remediation method, which can more thoroughly and effectively remove petroleum pollutants in groundwater.

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

[0006] A petroleum-contaminated groundwater remediation device, comprising an extraction well connected to the groundwater, an air flotation treatment mechanism, an adsorption treatment mechanism, and a microbial treatment mechanism connected to the extraction well;

[0007] An extraction pump is fixed in the extraction well, and the input end of the extraction pump is connected to the groundwater;

[0008] The flotation treatment mechanism includes a flotation treatment container shell fixed to the ground and extending vertically, a rotary aeration mechanism is provided at the bottom of the flotation treatment container shell, a centrifugal stirring mechanism is provided inside the flotation treatment container shell, and an air flotation discharge mechanism is provided at the top of the flotation treatment container shell;

[0009] The adsorption treatment mechanism includes an adsorption treatment main containment shell, in which a plurality of vertically extending adsorption treatment circulation shells are fixed, an adsorption treatment circulation tube coaxially arranged therein is fixed therein, and a plurality of coaxial adsorbent filling ring shells are sheathed outside the adsorption treatment circulation tube;

[0010] A plurality of adsorption flow input pipes connected to the interior of the adsorption treatment flow cylinder shell are fixed to the lower end of the outer side of the adsorption treatment flow cylinder shell;

[0011] The upper end of the adsorption treatment flow pipe extends upward to the outside of the adsorption treatment total containment shell, and the upper ends of multiple adsorption treatment flow pipes are commonly connected to an adsorption treatment total shell, and an adsorption treatment external discharge pipe connected to the interior of the adsorption treatment total shell is fixed to the outside of the adsorption treatment total shell;

[0012] The microorganism treatment mechanism includes a microorganism treatment containment shell, in which a plurality of microorganism containment spherical shells are suspended, and a buoyancy spherical shell concentric with the microorganism containment spherical shell is fixed inside the microorganism containment spherical shell, and a microorganism filling cavity is formed between the outer surface of the buoyancy spherical shell and the inner surface of the microorganism containment spherical shell;

[0013] The microbial filling cavity is filled with a microbial attachment filler;

[0014] A spherical shell traction cable is fixedly connected between the microorganism containing spherical shell and the inner bottom of the microorganism processing containing shell.

[0015] Preferably, an air flotation treatment input pipe and an air flotation treatment output pipe connected to the interior of the air flotation treatment container shell are fixed on the outside of the air flotation treatment container shell, and the air flotation treatment input pipe is connected to the output end of the extraction and delivery pump;

[0016] The adsorption treatment flow pipe is located inside the adsorption treatment flow shell and has a plurality of adsorption treatment flow holes on its side wall;

[0017] An adsorption treatment main input pipe connected to the interior is fixed on the outside of the adsorption treatment main containment shell, and a backwash main output pipe connected to the interior is fixed on the outside of the adsorption treatment main containment shell;

[0018] The adsorption treatment main input pipe is connected to the flotation treatment output pipe;

[0019] A microbial treatment input pipe and a microbial treatment output pipe connected to the interior of the microbial treatment containing shell are fixed on the outside of the microbial treatment containing shell;

[0020] The microbial treatment input pipe is connected to the adsorption treatment external discharge pipe;

[0021] A plurality of aeration and pressure relief pipes connected to the interior of the microbial treatment containment shell are fixed on the top of the microbial treatment containment shell;

[0022] The microbial treatment output pipe is connected to an ultrafiltration filter, and a repair injection well connected to groundwater is drilled at the downstream end of the extraction well.

[0023] Preferably, an input filter mechanism is provided at the input end of the extraction and delivery pump, the input filter mechanism comprising an input filter fixed tube fixed to the input end of the extraction and delivery pump and extending vertically, an input filter lifting tube coaxially connected to the outer side of the input filter fixed tube in a sliding manner, an input filter support ring coaxially connected to the lower end of the input filter lifting tube in a rotatable manner, an input filter screen housing with an upward opening fixed to the lower end of the input filter support ring, and a side wall of the input filter screen housing having a porous hollow structure communicating with the inside and outside;

[0024] A plurality of rotating drive blades are fixed to the inner side of the input filter support ring;

[0025] A filter lift fixed cylinder with an opening facing downward is fixed in the extraction well, a filter lift sliding cylinder with an opening facing upward is slidably connected in the filter lift fixed cylinder, and the lower end of the filter lift sliding cylinder is fixedly connected to the input filter lift pipe;

[0026] A filter lifting driving rod for driving the filter lifting sliding cylinder to move up and down is arranged in the filter lifting fixed cylinder.

[0027] Note: The input filter mechanism can filter out silt and other particulate impurities during the extraction process to avoid damage to the extraction pump and blockage of the water pipe;

[0028] When groundwater flows from bottom to top in the input filter lifting pipe, the water flow drives multiple rotating drive blades to rotate the input filter support ring, and the input filter support ring then drives the input filter mesh shell to rotate with it. Under the centrifugal effect, it can get rid of debris attached to the outside of the input filter mesh shell to maintain good filtering performance of the input filter mesh shell.

[0029] Preferably, the rotary aeration mechanism includes a rotary aeration delivery pipe shell rotatably connected to the bottom of the flotation treatment container shell in a vertical direction, a plurality of radial connecting short pipes extending radially and communicating with the interior of the rotary aeration delivery pipe shell are fixed to the outside of the rotary aeration delivery pipe shell, and a rotary aeration pipe shell coaxial with the radial connecting short pipe is rotatably connected to the radial connecting short pipe;

[0030] A coaxial rotating drive gear ring is fixed on the outside of the rotary aeration tube shell, and a coaxial rotating mating fixed gear ring is provided on the outside of the rotary aeration delivery tube shell. The rotating drive gear ring is meshed with the rotating mating fixed gear ring.

[0031] A rotary drive support ring coaxially arranged with the rotary aeration conveying pipe shell is fixed to the bottom of the air flotation treatment container shell, and a rotary matching fixed gear ring is fixed to the top of the rotary drive support ring;

[0032] An aeration input short pipe connected to the interior of the rotary aeration delivery pipe shell is fixed on the top of the rotary aeration delivery pipe shell. The aeration input short pipe is connected to the aeration main delivery pipe through a rotary joint. The other end of the aeration main delivery pipe extends to the outside of the flotation treatment container shell.

[0033] Description: While the rotary aeration shell revolves around the vertical axis of the rotary aeration delivery shell, it can also rotate around its own axis, thereby evenly dispersing the formed tiny bubbles in the groundwater in the flotation treatment container shell.

[0034] Preferably, the centrifugal stirring mechanism includes a centrifugal stirring support ring arranged with its axis in a vertical direction and fixed on the inner side wall of the air flotation treatment container shell, the centrifugal stirring support ring is rotatably connected to a centrifugal stirring rotating ring coaxial therewith, and a plurality of centrifugal stirring blades are fixed inside the centrifugal stirring rotating ring;

[0035] A vertically penetrating stirring limiting guide ring is provided inside the flotation treatment containing cylinder shell and below the centrifugal stirring rotating ring. The outer side of the stirring limiting guide ring is fixedly connected to the inner side wall of the flotation treatment containing cylinder shell through multiple stirring limiting guide plates. The stirring limiting guide plates are extended along the radial plane of the stirring limiting guide ring.

[0036] Description: The centrifugal stirring rotating ring is driven by a conventional motor fixed to the inner wall of the flotation treatment container shell through a gear ring to rotate around the vertical axis of the centrifugal stirring support ring. The centrifugal stirring rotating ring then drives multiple centrifugal stirring blades to rotate together to stir the groundwater, so that the upper part of the groundwater in the flotation treatment container shell forms a vortex state, thereby forcing oil droplets attached with tiny bubbles to gather at the center of the vortex.

[0037] Preferably, the air flotation discharge mechanism comprises an air flotation discharge guide pipe slidably connected to the top of the air flotation treatment container shell in the vertical direction;

[0038] An air flotation lifting fixed cylinder with an upward opening is fixed on the top of the air flotation treatment container shell, an air flotation lifting sliding cylinder with a downward opening is slidably connected inside the air flotation lifting fixed cylinder, and the upper end of the air flotation lifting sliding cylinder is fixedly connected to the air flotation exhaust guide pipe;

[0039] An air floating lifting driving rod for driving the air floating lifting sliding cylinder to move up and down is arranged in the air floating lifting fixed cylinder.

[0040] Description: In the air flotation and exhaust mechanism, the extension or retraction of the inner rod of the air flotation lifting drive rod can drive the air flotation lifting sliding cylinder together with the air flotation and exhaust guide tube to move in the vertical direction to adjust the distance between the lower end of the air flotation and exhaust guide tube and the water surface in the air flotation treatment container shell, so that the lower end of the air flotation and exhaust guide tube just contacts the water surface at the center of the vortex.

[0041] Preferably, a plurality of backwash input pipes connected to the interior of the adsorption treatment circulation pipe are fixed to the outside of one end of the adsorption treatment circulation pipe extending to the outside of the adsorption treatment main containing shell.

[0042] Note: When backwashing the adsorbent in the adsorbent filling ring shell is required, first drain the groundwater in the adsorption treatment circulation cylinder shell and the adsorption treatment total containment shell, close the adsorption treatment external discharge pipe and the adsorption treatment total input pipe, and open the backwash total output pipe;

[0043] Clean water is input into the adsorption treatment circulation pipe through the backwash input pipe. The clean water flows from top to bottom in the adsorption treatment circulation pipe and flows through the adsorption treatment circulation holes along the radial direction of the adsorption treatment circulation shell and passes through each adsorbent filling ring shell to achieve backwashing of the adsorbent in the adsorbent filling ring shell.

[0044] The sewage generated by backwashing will flow from top to bottom in the adsorption treatment circulation shell, and then be discharged into the adsorption treatment total containment shell through the adsorption circulation input pipe. Finally, the backwash sewage in the adsorption treatment total containment shell can be discharged through the backwash total output pipe.

[0045] The side wall of the adsorbent-filled ring shell is a porous hollow structure with internal and external connections;

[0046] The top of the adsorbent filling ring shell is provided with an outward convex snap ring near the inner side, and the bottom of the adsorbent filling ring shell is provided with an inward concave snap fitting groove near the inner side;

[0047] The outwardly convex snap-fitting ring on the top of the adsorbent-filled annular shell is snap-fitted into the inwardly concave snap-fitting groove on the bottom of an adjacent adsorbent-filled annular shell.

[0048] Description: This structure enables two adjacent adsorbent-filled ring shells to be firmly connected to each other, and the adsorbent-filled ring shells can be arranged in a vertical direction to form a hollow cylindrical structure.

[0049] Preferably, a plurality of microbial aeration spherical shells are fixed to the bottom of the microbial treatment containment shell, and a microbial dispersion aeration shell is provided on the outside of the microbial aeration spherical shells, which are connected to each other through a microbial aeration short tube, and a plurality of dispersion aeration micropores are provided on the side wall of the microbial dispersion aeration shell;

[0050] A microbial aeration delivery pipe communicating with the interior of the microbial aeration ball is fixed on the lower side of the ball shell.

[0051] Description: Air is input into the microbial aeration conveying pipe using an existing air conveyor. After entering the microbial aeration ball shell, the air passes through each microbial aeration short tube and then enters the microbial dispersed aeration shell. Finally, the air in the microbial dispersed aeration shell is discharged through multiple dispersed aeration micropores, forming small bubbles in the groundwater and circulating from bottom to top, maintaining the oxygen dissolved in the groundwater, thereby providing a stable oxygen supply for the activities of microorganisms.

[0052] Preferably, a wave-making mechanism is provided on the microorganism treatment containment shell, the wave-making mechanism comprising a wave-making mechanism support cylinder placed horizontally and fixed on the side wall of the microorganism treatment containment shell with its opening facing inward, a wave-making mechanism sliding cylinder arranged opposite to its opening being slidably connected in the wave-making mechanism support cylinder, and a wave-making mechanism driving plate arranged along a vertical plane is fixed to one end of the wave-making mechanism sliding cylinder located inside the microorganism treatment containment shell;

[0053] A wave-making driving rod for driving the sliding cylinder of the wave-making mechanism to move is arranged in the supporting cylinder of the wave-making mechanism.

[0054] Description: The wave-making mechanism is used to drive the groundwater in the microbial treatment containment shell to form periodic surges, forcing the groundwater in the microbial treatment containment shell to move relative to each microbial containment spherical shell, so that all the groundwater can fully contact the microbial attachment filler.

[0055] Preferably, a method for remediating petroleum-contaminated groundwater, based on the above-mentioned petroleum-contaminated groundwater remediation equipment, comprises the following steps:

[0056] S1. Construction of extraction wells:

[0057] Drill an extraction well connected to the groundwater at the upstream end of the groundwater contamination area, place an extraction pump into the extraction well, and connect the input end of the extraction pump to the groundwater;

[0058] The groundwater is injected into the air flotation treatment container shell through the air flotation treatment input pipe by utilizing the conveying function of the extraction and delivery pump;

[0059] S2. Flotation treatment of groundwater:

[0060] The groundwater in the flotation treatment container shell is aerated by a rotary aeration mechanism. The resulting tiny bubbles move from bottom to top in the flotation treatment container shell. These tiny bubbles will attach to the oil droplets in the groundwater, forcing the oil droplets in the groundwater to move upward with the tiny bubbles and eventually float to the water surface in the flotation treatment container shell.

[0061] The groundwater in the air flotation treatment container shell is driven to rotate by a centrifugal stirring mechanism. Under the centrifugal force, the groundwater moves toward the inner wall of the air flotation treatment container shell, forcing the oil droplets with attached tiny bubbles to gather in the center of the air flotation treatment container shell. Finally, the oil droplets with attached tiny bubbles gathered in the center of the air flotation treatment container shell are sucked out by the air flotation discharge mechanism.

[0062] S3. Filtration and adsorption treatment of groundwater:

[0063] The groundwater after flotation treatment is discharged through the flotation treatment output pipe and input into the adsorption treatment main containment shell through the adsorption treatment main input pipe;

[0064] The groundwater in the adsorption treatment containment shell enters the adsorption treatment circulation shell through the adsorption circulation input pipe. The groundwater flows from bottom to top in the adsorption treatment circulation shell. While flowing from bottom to top in the adsorption treatment circulation shell, the groundwater also flows radially through each adsorbent-filled annular shell toward the adsorption treatment circulation pipe. When passing through each adsorbent-filled annular shell, the activated carbon adsorbent filled in the adsorbent-filled annular shell adsorbs and filters the oil droplets in the groundwater.

[0065] The groundwater after adsorption filtration passes through the adsorption treatment flow holes into the adsorption treatment flow pipe and flows from bottom to top. Finally, the groundwater in multiple adsorption treatment flow pipes converges into the adsorption treatment summing shell.

[0066] S4. Microbial purification of groundwater:

[0067] The groundwater after filtration and adsorption treatment is discharged through the adsorption treatment external discharge pipe and input into the microbial treatment holding shell through the microbial treatment input pipe;

[0068] Multiple microbial containment spherical shells are suspended and immersed in groundwater. Groundwater can enter the microbial filling cavity through the porous hollow structure of the microbial containment spherical shell. The microorganisms attached to the microbial filler decompose the petroleum substances in the groundwater to achieve the purpose of purifying water quality.

[0069] S5. The purified groundwater is injected back into the ground:

[0070] The groundwater after microbial purification is discharged through the microbial treatment output pipe, and the microorganisms in the groundwater are filtered and intercepted by an ultrafiltration filter. The output end of the ultrafiltration filter is extended to the inside of the repair injection well through a pipeline and connected to the groundwater, and then the purified groundwater is re-injected into the underground.

[0071] Compared with the prior art, the beneficial effects of the present invention are embodied in the following aspects:

[0072] 1. The present invention has a reasonable structural design and high purification efficiency. It can treat a large amount of contaminated groundwater in a relatively short period of time, thereby reducing the concentration of petroleum pollutants in the groundwater as quickly as possible and reducing the scope of pollution spread.

[0073] 2. The present invention is easy to operate and has advanced treatment technology. It can purify petroleum pollutants in groundwater to meet relevant standards. Through coordinated treatment such as flotation treatment, adsorption treatment, and microbial purification treatment, it ensures that the purified groundwater meets the requirements for reuse or discharge.

[0074] 3. The repair equipment of the present invention has good adaptability to pollutants and can effectively separate, adsorb and degrade petroleum pollutants of various components and concentrations;

[0075] 4. The input filter mechanism of the present invention can filter out granular impurities such as mud and sand during the extraction process, avoiding damage to the extraction pump and blockage of the water pipe;

[0076] 5. In the rotary aeration mechanism of the present invention, each rotary aeration shell can simultaneously rotate around its own axis while revolving around the vertical axis of the rotary aeration delivery shell, thereby evenly dispersing the formed microbubbles in the groundwater within the flotation treatment container shell, thereby improving the flotation separation efficiency.

[0077] 6. The wave-making mechanism of the present invention can drive the groundwater in the microbial treatment containment shell to form periodic surges, forcing the groundwater in the microbial treatment containment shell to move relative to each microbial containment spherical shell, so that all the groundwater can fully contact the microbial attachment filler, ensuring a good microbial purification effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0078] Figure 1 It is a front view of the present invention;

[0079] Figure 2 It is a structural diagram of the input filtering mechanism of the present invention;

[0080] Figure 3 It is a structural schematic diagram of the rotary aeration mechanism of the present invention;

[0081] Figure 4 It is a structural schematic diagram of the centrifugal stirring mechanism of the present invention;

[0082] Figure 5 It is a structural schematic diagram of the air flotation efflux mechanism of the present invention;

[0083] Figure 6 It is a structural schematic diagram of the adsorption treatment mechanism of the present invention;

[0084] Figure 7 yes Figure 6 A top view of

[0085] Figure 8 Schematic diagram of the structure of the adsorbent-filled ring shell of the present invention;

[0086] Figure 9 It is a structural schematic diagram of the microbial treatment mechanism of the present invention;

[0087] Figure 10 It is a schematic structural diagram of the microbial aeration spheroid shell of the present invention.

[0088] In the figure, 10-extraction well, 101-repair injection well, 11-extraction delivery pump, 12-input filter mechanism, 121-input filter fixed pipe, 122-input filter lifting pipe, 123-input filter support ring, 124-input filter screen shell, 125-rotating drive blade, 126-filter lifting fixed cylinder, 127-filter lifting sliding cylinder, 128-filter lifting drive rod, 20-flotation treatment mechanism, 21-flotation treatment containing cylinder shell, 211-flotation treatment input pipe, 212-flotation treatment output pipe, 213-agitation limiting guide ring, 214-agitation limiting guide plate, 22-rotating aeration mechanism, 220-rotating drive support ring, 221-rotating aeration delivery pipe shell, 222-radial connecting short pipe, 223-rotating aeration pipe shell, 224-rotating drive gear ring, 225-rotating matching fixed gear ring, 226-aeration input short pipe, 227-rotating joint, 228-aeration main delivery pipe, 23-centrifugal agitation mechanism, 231-centrifugal agitation support ring, 232-centrifugal agitation rotating ring, 233-centrifugal agitation blade, 24-air flotation discharge mechanism, 241-air flotation discharge guide pipe, 242-air flotation lifting fixed cylinder, 243-air flotation lifting sliding cylinder, 244-air flotation lifting driving rod, 30-adsorption treatment mechanism, 31-adsorption treatment total containing shell, 311-adsorption treatment total input pipe, 312-backwashing total output pipe, 313-backwashing input pipe, 32-adsorption treatment circulation cylinder shell, 321-adsorption circulation input pipe, 33-adsorption treatment circulation pipe, 330-adsorption treatment circulation small hole, 34-adsorbent filling ring shell, 341-convex snap ring, 342-concave snap fitting groove, 35-adsorption treatment total shell, 351-adsorption Attached treatment external discharge pipe, 40-microbial treatment mechanism, 41-microbial treatment containing shell, 411-microbial treatment input pipe, 412-microbial treatment output pipe, 413-aeration pressure relief pipe, 414-ultrafiltration filter, 42-microbial containing spherical shell, 420-microbial filling cavity, 421-microbial attachment filler, 422-spherical shell traction cable, 43-buoyancy spherical shell, 44-microbial aeration spherical shell, 441-microbial aeration short pipe, 442-microbial dispersed aeration shell, 4420-dispersed aeration micropores, 443-microbial aeration delivery pipe. DETAILED DESCRIPTION

[0089] The following combination Figures 1 to 10 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 each main view or structural schematic diagram itself.

[0090] Example 1:

[0091] A petroleum-contaminated groundwater remediation device, such as Figure 1As shown, it includes an extraction well 10 connected to groundwater, an air flotation treatment mechanism 20, an adsorption treatment mechanism 30, and a microbial treatment mechanism 40 connected to the extraction well 10;

[0092] An extraction pump 11 is fixed in the extraction well 10, and the input end of the extraction pump 11 is connected to the groundwater;

[0093] like Figure 1 As shown, the flotation treatment mechanism 20 includes a flotation treatment container shell 21 fixed to the ground and extending vertically. A rotary aeration mechanism 22 is provided at the bottom of the flotation treatment container shell 21, a centrifugal stirring mechanism 23 is provided inside the flotation treatment container shell 21, and an air flotation discharge mechanism 24 is provided at the top of the flotation treatment container shell 21.

[0094] An air flotation treatment input pipe 211 and an air flotation treatment output pipe 212 are fixed to the outside of the air flotation treatment container shell 21 and are connected to the inside thereof. The air flotation treatment input pipe 211 is connected to the output end of the extraction and delivery pump 11.

[0095] like Figure 1 As shown, the adsorption treatment mechanism 30 includes an adsorption treatment total housing 31, as shown in FIG. Figure 6 As shown, a plurality of vertically extending adsorption treatment circulation cylinder shells 32 are fixed in the adsorption treatment circulation cylinder shell 31, an adsorption treatment circulation pipe 33 coaxially arranged therewith is fixed in the adsorption treatment circulation cylinder shell 32, and a plurality of coaxial adsorbent filling annular shells 34 are sheathed outside the adsorption treatment circulation pipe 33;

[0096] A plurality of adsorption flow inlet pipes 321 communicating with the interior of the adsorption treatment flow cylinder shell 32 are fixed to the lower end of the outer side of the adsorption treatment flow cylinder shell 32;

[0097] like Figure 6 As shown, the upper ends of the adsorption process flow pipes 33 extend upward to the outside of the adsorption process main housing 31, and the upper ends of the multiple adsorption process flow pipes 33 are connected to an adsorption process summing shell 35. The outer side of the adsorption process summing shell 35 is fixed with an adsorption process outer discharge pipe 351 connected to the interior thereof;

[0098] like Figure 8 As shown, the adsorption treatment flow pipe 33 is located inside the adsorption treatment flow shell 32 and has a plurality of adsorption treatment flow holes 330 on its side wall;

[0099] The outer side of the adsorption treatment main containing shell 31 is fixed with an adsorption treatment main input pipe 311 connected to the interior thereof, and the outer side of the adsorption treatment main containing shell 31 is fixed with a backwash main output pipe 312 connected to the interior thereof;

[0100] The adsorption treatment main input pipe 311 is connected to the flotation treatment output pipe 212;

[0101] like Figure 8 As shown, the side wall of the adsorbent filling ring shell 34 is a porous hollow structure that is communicated with the inside and outside, and the inside of the adsorbent filling ring shell 34 is filled with activated carbon adsorbent;

[0102] The top of the adsorbent filling ring shell 34 is provided with an outward convex snap ring 341 near the inner side, and the bottom of the adsorbent filling ring shell 34 is provided with an inward concave snap fitting groove 342 near the inner side.

[0103] The outwardly protruding snap ring 341 on the top of the adsorbent filling ring shell 34 is snap-fitted into the inwardly concave snap-fitting groove 342 on the bottom of an adjacent adsorbent filling ring shell 34 .

[0104] like Figure 1 As shown, the microorganism treatment mechanism 40 includes a microorganism treatment containing shell 41, in which a plurality of microorganism containing spherical shells 42 are suspended. Figure 9 As shown, a buoyancy spherical shell 43 concentric with the microorganism containing spherical shell 42 is fixed inside the microorganism containing spherical shell 42, and a microorganism-filled cavity 420 is formed between the outer surface of the buoyancy spherical shell 43 and the inner surface of the microorganism containing spherical shell 42;

[0105] The shell of the microorganism containing spherical shell 42 is a porous hollow structure with the inside and outside communicating;

[0106] like Figure 9 As shown, the microorganism-filled cavity 420 is filled with a microorganism-attached filler 421 , and the microorganism-attached filler 421 is a honeycomb filler made of glass fiber reinforced plastic in the prior art;

[0107] A spherical shell traction cable 422 is fixedly connected between the microorganism containing spherical shell 42 and the inner bottom of the microorganism processing containing shell 41;

[0108] A microbial treatment input pipe 411 and a microbial treatment output pipe 412 are fixed to the outside of the microbial treatment housing 41 and are connected to the inside of the housing.

[0109] The microbial treatment input pipe 411 is connected to the adsorption treatment effluent pipe 351;

[0110] A plurality of aeration and pressure relief pipes 413 are fixed on the top of the microbial treatment containment shell 41 and communicate with the interior thereof;

[0111] The microbial treatment output pipe 412 is connected to the ultrafiltration filter 414 of the prior art. A repair injection well 101 connected to the groundwater is drilled at the downstream end of the extraction well 10. The output end of the ultrafiltration filter 414 extends to the inside of the repair injection well 101 through a pipeline and is connected to the groundwater.

[0112] like Figure 9 As shown, a plurality of microorganism aeration spherical shells 44 are fixed at the bottom of the microorganism treatment containment shell 41. Figure 10As shown, the outer side of the microbial aeration ball shell 44 is connected to a microbial dispersion aeration shell 442 via a microbial aeration short tube 441, and a plurality of dispersion aeration micropores 4420 are provided on the side wall of the microbial dispersion aeration shell 442;

[0113] A microbial aeration delivery pipe 443 communicating with the interior of the microbial aeration ball shell 44 is fixed to the lower side of the microbial aeration ball shell 44 .

[0114] Example 2:

[0115] This embodiment describes a method for remediating petroleum-contaminated groundwater, based on a petroleum-contaminated groundwater remediation device according to the above embodiment 1, comprising the following steps:

[0116] S1. Construction of extraction wells:

[0117] Drill an extraction well 10 connected to the groundwater at the upstream end of the groundwater contaminated area, place an extraction pump 11 into the extraction well 10, and connect the input end of the extraction pump 11 to the groundwater;

[0118] The groundwater is injected into the flotation treatment container shell 21 through the flotation treatment input pipe 211 by the extraction and delivery pump 11;

[0119] S2. Flotation treatment of groundwater:

[0120] The groundwater in the flotation treatment container shell 21 is aerated by the rotary aeration mechanism 22. The resulting tiny bubbles move upward from bottom to top in the flotation treatment container shell 21. These tiny bubbles attach to the oil droplets in the groundwater, forcing the oil droplets in the groundwater to move upward along with the tiny bubbles and eventually float to the water surface in the flotation treatment container shell 21.

[0121] The centrifugal stirring mechanism 23 is used to drive the groundwater in the air flotation treatment container shell 21 to rotate. Under the centrifugal force, the groundwater will move toward the inner side wall of the air flotation treatment container shell 21, forcing the oil droplets with attached micro bubbles to gather at the center of the air flotation treatment container shell 21. Finally, the air flotation discharge mechanism 24 is used to suck out the oil droplets with attached micro bubbles gathered at the center of the air flotation treatment container shell 21.

[0122] S3. Filtration and adsorption treatment of groundwater:

[0123] The groundwater after flotation treatment is discharged through the flotation treatment output pipe 212 and input into the adsorption treatment main containment shell 31 through the adsorption treatment main input pipe 311;

[0124] The groundwater in the adsorption treatment main containment shell 31 enters the adsorption treatment circulation shell 32 through the adsorption circulation inlet pipe 321. The groundwater flows from bottom to top in the adsorption treatment circulation shell 32. While flowing from bottom to top in the adsorption treatment circulation shell 32, the groundwater also flows radially through each adsorbent-filled annular shell 34 toward the adsorption treatment circulation pipe 33. As the groundwater passes through each adsorbent-filled annular shell 34, the activated carbon adsorbent filled in the adsorbent-filled annular shell 34 absorbs and filters oil droplets in the groundwater.

[0125] The groundwater after adsorption and filtration passes through the adsorption treatment flow holes 330 and enters the adsorption treatment flow pipe 33 and flows in a bottom-up direction. Finally, the groundwater in the multiple adsorption treatment flow pipes 33 is collected in the adsorption treatment collection shell 35.

[0126] S4. Microbial purification of groundwater:

[0127] The groundwater after filtration and adsorption treatment is discharged through the adsorption treatment external discharge pipe 351 and input into the microbial treatment housing 41 through the microbial treatment input pipe 411;

[0128] The multiple microorganism-holding spherical shells 42 are suspended and immersed in groundwater. Groundwater can enter the microorganism-filled cavity 420 through the porous hollow structure of the microorganism-holding spherical shell 42. The microorganisms on the microorganism-attached filler 421 decompose the petroleum substances in the groundwater, thereby achieving the purpose of purifying the water quality.

[0129] Pseudomonas aeruginosa, Burkholderia cepacia, Bacillus subtilis, Bacillus licheniformis, and Acinetobacter baumannii are attached to the microbial attachment filler 421;

[0130] Air is fed into the microbial aeration conveying pipe 443 using an existing air conveyor. The air enters the microbial aeration spherical shell 44 and then passes through each microbial aeration short tube 441 into the microbial dispersion aeration shell 442. Finally, the air in the microbial dispersion aeration shell 442 is discharged through multiple dispersed aeration micropores 4420, forming small bubbles in the groundwater that circulate upward, maintaining the dissolved oxygen content in the groundwater and providing a stable oxygen supply for microbial activity.

[0131] S5. The purified groundwater is injected back into the ground:

[0132] The groundwater after microbial purification is discharged through the microbial treatment output pipe 412, and the ultrafiltration filter 414 is used to filter and intercept microorganisms in the groundwater. The output end of the ultrafiltration filter 414 is extended to the inside of the repair injection well 101 through a pipeline and connected to the groundwater, and then the purified groundwater is re-injected into the underground.

[0133] Example 3:

[0134] On the basis of Example 1, Figure 1 As shown, the input end of the extraction and delivery pump 11 is provided with an input filtering mechanism 12, as shown in FIG. Figure 2 As shown, the input filter mechanism 12 includes an input filter fixed tube 121 fixed to the input end of the extraction and delivery pump 11 and extending vertically. The outer side of the input filter fixed tube 121 is slidably connected to the input filter lifting tube 122 coaxial with the input filter lifting tube 122. The lower end of the input filter lifting tube 122 is internally connected to the input filter support ring 123 coaxial with the input filter. The lower end of the input filter support ring 123 is fixed to an input filter screen housing 124 with an upward opening. The side wall of the input filter screen housing 124 is a porous hollow structure with internal and external communication.

[0135] A plurality of rotating drive blades 125 are fixed inside the input filter support ring 123;

[0136] A filter lift fixed cylinder 126 with an opening facing downward is fixed in the extraction well 10. A filter lift sliding cylinder 127 with an opening facing upward is slidably connected in the filter lift fixed cylinder 126. The lower end of the filter lift sliding cylinder 127 is fixedly connected to the input filter lift pipe 122.

[0137] A filter lifting drive rod 128 is provided in the filter lifting fixed cylinder 126 for driving the filter lifting sliding cylinder 127 to move up and down. The filter lifting drive rod 128 is an electrically controlled telescopic rod driven by a servo motor in the prior art. The outer rod end of the filter lifting drive rod 128 is fixedly connected to the top of the filter lifting fixed cylinder 126, and the inner rod end of the filter lifting drive rod 128 is fixedly connected to the bottom of the filter lifting sliding cylinder 127.

[0138] Example 4:

[0139] This embodiment describes a method for remediating petroleum-contaminated groundwater, based on the petroleum-contaminated groundwater remediation equipment of the above-mentioned embodiment 3. The difference from embodiment 2 is that the input filtering mechanism 12 in step S1 can filter out particulate impurities such as mud and sand during the extraction process, thereby avoiding damage to the extraction pump 11 and clogging of the water pipe.

[0140] Driven by the filter lift drive rod 128, the filter lift slide cylinder 127 and the input filter lift pipe 122 can be lifted and lowered together in the vertical direction to adjust the depth of the lower end of the input filter lift pipe 122 into the groundwater so that the lower end of the input filter lift pipe 122 is at the middle position of the groundwater layer thickness.

[0141] Under the action of the extraction and delivery pump 11, groundwater passes through the input filter screen 124 and enters the lower end of the input filter lift pipe 122 and flows from bottom to top. The filtering and intercepting effect of the input filter screen 124 is used to filter and intercept particulate impurities such as sediment in the groundwater.

[0142] In the process of groundwater flowing from bottom to top in the input filter lifting pipe 122, the water flow drives multiple rotating drive blades 125 to drive the input filter support ring 123 to rotate, and the input filter support ring 123 then drives the input filter mesh shell 124 to rotate with it. Under the centrifugal effect, it can get rid of debris attached to the outside of the input filter mesh shell 124 to maintain good filtering performance of the input filter mesh shell 124.

[0143] Example 5:

[0144] On the basis of Example 3, Figure 3 As shown, the rotary aeration mechanism 22 includes a rotary aeration delivery pipe shell 221 that is rotatably connected to the bottom of the flotation treatment container shell 21 in the vertical direction. A plurality of radial connecting short pipes 222 extending radially and communicating with the interior of the rotary aeration delivery pipe shell 221 are fixed to the outside of the rotary aeration delivery pipe shell 221. A rotary aeration pipe shell 223 coaxial with the radial connecting short pipe 222 is rotatably connected to the radial connecting short pipe 222.

[0145] A coaxial rotating drive ring gear 224 is fixed to the outside of the rotary aeration tube shell 223. A coaxial rotating fixed ring gear 225 is provided on the outside of the rotary aeration delivery tube shell 221. The rotating drive ring gear 224 is meshed with the rotating fixed ring gear 225.

[0146] A rotary drive support ring 220 coaxially arranged with the rotary aeration delivery pipe shell 221 is fixed to the bottom of the air flotation treatment housing shell 21, and a rotary matching fixed gear ring 225 is fixed to the top of the rotary drive support ring 220;

[0147] The rotary aeration conveying pipe shell 221 is driven by a prior art servo motor fixed to the rotary drive support ring 220 through gear transmission to rotate around its own vertical axis;

[0148] An aeration input short pipe 226 connected to the interior of the rotary aeration delivery pipe shell 221 is fixed on the top. The aeration input short pipe 226 is connected to the aeration main delivery pipe 228 through a rotary joint 227. The other end of the aeration main delivery pipe 228 extends to the outside of the flotation treatment container shell 21.

[0149] Example 6:

[0150] This embodiment describes a method for remediating petroleum-contaminated groundwater, and is based on a petroleum-contaminated groundwater remediation device according to the above-mentioned embodiment 5. The difference from embodiment 4 is that, in the rotary aeration mechanism 22 of step S2, an air conveyor is used to convey air into the main aeration conveying pipe 228. The air passes through the rotary joint 227 and the aeration input short pipe 226 in sequence and enters the interior of the rotary aeration conveying pipe shell 221. The air inside the rotary aeration conveying pipe shell 221 then enters the interior of the rotary aeration pipe shell 223 through the radial connecting short pipes 222. The sidewall of the rotary aeration pipe shell 223 has a plurality of micropores communicating with each other. The air is discharged through the micropores on the sidewall of the rotary aeration pipe shell 223 into the groundwater in the flotation treatment container shell 21, and the formed microbubbles move from bottom to top in the flotation treatment container shell 21.

[0151] At the same time, the rotary aeration conveying pipe shell 221 is driven by a prior art servo motor fixed to the rotary drive support ring 220 through gear transmission to rotate around its own vertical axis. The rotary aeration conveying pipe shell 221 drives the radial connecting short pipe 222 and the rotary aeration pipe shell 223 to rotate together. Because the rotary drive ring gear 224 is engaged with the rotating matching fixed ring gear 225, the rotary aeration pipe shell 223 can simultaneously rotate around its own axis while revolving around the vertical axis of the rotary aeration conveying pipe shell 221, thereby evenly dispersing the formed tiny bubbles in the groundwater within the flotation treatment container shell 21.

[0152] Example 7:

[0153] On the basis of Example 5, Figure 4 As shown, the centrifugal stirring mechanism 23 includes a centrifugal stirring support ring 231 arranged with its axis in the vertical direction and fixed on the inner side wall of the air flotation treatment container shell 21. The centrifugal stirring support ring 231 is rotatably connected to a centrifugal stirring rotating ring 232 coaxial with the centrifugal stirring rotating ring 232. A plurality of centrifugal stirring blades 233 are fixed inside the centrifugal stirring rotating ring 232.

[0154] The centrifugal stirring rotating ring 232 is driven by a conventional motor fixed to the inner side wall of the air flotation treatment container shell 21 through a gear ring transmission to rotate around the vertical axis of the centrifugal stirring support ring 231;

[0155] A vertically penetrating stirring limiting guide ring 213 is provided inside the flotation treatment containing cylinder shell 21 and below the centrifugal stirring rotating ring 232. The outer side of the stirring limiting guide ring 213 is fixedly connected to the inner wall of the flotation treatment containing cylinder shell 21 through multiple stirring limiting guide plates 214. The stirring limiting guide plates 214 are extended along the radial plane of the stirring limiting guide ring 213.

[0156] Example 8:

[0157] This embodiment describes a method for remediating petroleum-contaminated groundwater, which is based on a petroleum-contaminated groundwater remediation device according to the above-mentioned embodiment 7. The difference from embodiment 6 is that in the centrifugal stirring mechanism 23 of step S2, the centrifugal stirring rotating ring 232 is driven by a conventional motor fixed to the inner wall of the flotation treatment container shell 21 through a gear ring transmission to rotate around the vertical axis of the centrifugal stirring support ring 231. The centrifugal stirring rotating ring 232 then drives multiple centrifugal stirring blades 233 to rotate together to rotate and stir the groundwater, so that the upper half of the groundwater in the flotation treatment container shell 21 forms a vortex state, thereby forcing the oil droplets with tiny bubbles attached to gather at the center of the vortex.

[0158] Example 9:

[0159] On the basis of Example 7, Figure 5 As shown, the flotation discharge mechanism 24 includes an air flotation discharge guide pipe 241 slidably connected to the top of the flotation treatment container shell 21 in the vertical direction. The upper end of the air flotation discharge guide pipe 241 is connected to a negative pressure suction container. The interior of the negative pressure suction container is continuously evacuated by a conventional suction machine, so that the interior of the negative pressure suction container is always in a negative pressure state. Under the action of the negative pressure, the lower end of the air flotation discharge guide pipe 241 can suck the bubbles adsorbed with oil droplets gathered at the center into the negative pressure suction container, thereby separating the oil droplets in the groundwater.

[0160] An upward-opening air flotation lift fixed cylinder 242 is fixed to the top of the air flotation treatment container shell 21. An downward-opening air flotation lift sliding cylinder 243 is slidably connected to the air flotation lift fixed cylinder 242. The upper end of the air flotation lift sliding cylinder 243 is fixedly connected to the air flotation exhaust guide pipe 241.

[0161] An air-floating lifting drive rod 244 is provided in the air-floating lifting fixed cylinder 242 for driving the air-floating lifting sliding cylinder 243 to move up and down. The air-floating lifting drive rod 244 is an electrically controlled telescopic rod driven by a servo motor in the existing technology. The outer rod end of the air-floating lifting drive rod 244 is fixedly connected to the bottom of the air-floating lifting fixed cylinder 242, and the inner rod end of the air-floating lifting drive rod 244 is fixedly connected to the top of the air-floating lifting sliding cylinder 243.

[0162] Example 10:

[0163] This embodiment describes a method for remediating petroleum-contaminated groundwater, and is based on a petroleum-contaminated groundwater remediation device according to the above-mentioned embodiment 9. The difference from embodiment 8 is that, in the air flotation discharge mechanism 24 in step S2, the extension or retraction of the inner rod of the air flotation lift drive rod 244 can drive the air flotation lift slide cylinder 243 and the air flotation discharge guide tube 241 to move vertically, thereby adjusting the distance between the lower end of the air flotation discharge guide tube 241 and the water surface in the air flotation treatment container shell 21. The lower end of the flotation exhaust guide tube 241 is just in contact with the water surface at the center of the vortex. The upper end of the flotation exhaust guide tube 241 is connected to a negative pressure suction holding box. The suction machine of the existing technology is used to continuously pump air inside the negative pressure suction holding box, so that the inside of the negative pressure suction holding box is always in a negative pressure state. Under the action of negative pressure, the lower end of the flotation exhaust guide tube 241 can suck the oil droplets attached with tiny bubbles at the center of the vortex into the negative pressure suction holding box, thereby realizing the separation of oil droplets in groundwater.

[0164] Example 11:

[0165] On the basis of Example 9, Figure 6 As shown, a plurality of backwash inlet pipes 313 connected to the interior of the adsorption treatment circulation pipe 33 are fixed to the outside of one end of the adsorption treatment circulation pipe 33 extending to the outside of the adsorption treatment main containing shell 31 .

[0166] Example 12:

[0167] This embodiment describes a method for remediating petroleum-contaminated groundwater, based on a petroleum-contaminated groundwater remediation device according to the above-described embodiment 11. The difference from embodiment 10 is that, in step S3, when backwashing the adsorbent in the adsorbent filling annular shell 34 is required, the groundwater in the adsorption treatment circulation shell 32 and the adsorption treatment main containment shell 31 is first drained, the adsorption treatment external discharge pipe 351 and the adsorption treatment main input pipe 311 are closed, and the backwash main output pipe 312 is opened.

[0168] Clean water is input into the adsorption treatment circulation pipe 33 through the backwash input pipe 313. The clean water flows from top to bottom in the adsorption treatment circulation pipe 33 and flows radially through the adsorption treatment circulation shell 32 through the adsorption treatment circulation holes 330 and passes through each adsorbent filling ring shell 34, thereby backwashing the adsorbent in the adsorbent filling ring shell 34.

[0169] The sewage formed by backwashing will flow from top to bottom in the adsorption treatment circulation shell 32, and then be discharged into the adsorption treatment total containing shell 31 through the adsorption circulation input pipe 321. Finally, the backwash sewage in the adsorption treatment total containing shell 31 can be discharged through the backwash total output pipe 312.

[0170] Example 13:

[0171] On the basis of Example 11, Figure 9 As shown, a wave-making mechanism 45 is provided on the microorganism treatment containment shell 41. The wave-making mechanism 45 includes a wave-making mechanism support cylinder 451 that is horizontally placed and fixed to the side wall of the microorganism treatment containment shell 41 with its opening facing inward. A wave-making mechanism sliding cylinder 452 arranged opposite to its opening is slidably connected to the wave-making mechanism support cylinder 451. A wave-making mechanism driving plate 453 arranged along a vertical plane is fixed to one end of the wave-making mechanism sliding cylinder 452 located inside the microorganism treatment containment shell 41.

[0172] A wave-making drive rod 454 for driving the wave-making mechanism sliding cylinder 452 to move is provided in the wave-making mechanism support cylinder 451. The wave-making drive rod 454 is an electrically controlled telescopic rod driven by a servo motor in the prior art. The outer rod end of the wave-making drive rod 454 is fixedly connected to the inner end of the wave-making mechanism support cylinder 451, and the inner rod end of the wave-making drive rod 454 is fixedly connected to the inner end of the wave-making mechanism sliding cylinder 452.

[0173] Example 14:

[0174] This embodiment describes a method for remediating petroleum-contaminated groundwater, based on a petroleum-contaminated groundwater remediation device according to the aforementioned embodiment 13. This method differs from the embodiment 12 in that, in step S4, a wave-generating mechanism 45 is used to drive the groundwater within the microbial treatment containment shell 41 to form a surge, thereby allowing the groundwater to fully contact the microbial attachment filler 421 within the microbial containment spherical shell 42.

[0175] The inner rod of the wave-making driving rod 454 performs a reciprocating motion of extending and retracting, thereby driving the wave-making mechanism sliding cylinder 452 together with the wave-making driving plate 453 to perform reciprocating motion in the horizontal direction. The wave-making driving plate 453 eventually drives the groundwater in the microbial treatment containment shell 41 to form periodic surges, forcing the groundwater in the microbial treatment containment shell 41 to move relative to each microbial containment spherical shell 42, so that all the groundwater can fully contact the microbial attachment filler 421.

Claims

1. A petroleum-contaminated groundwater remediation device, characterized in that: It comprises an extraction well (10) connected to groundwater, an air flotation treatment mechanism (20), an adsorption treatment mechanism (30), and a microbial treatment mechanism (40) connected to the extraction well (10); An extraction and delivery pump (11) is fixed in the extraction well (10), and the input end of the extraction and delivery pump (11) is connected to the groundwater; The flotation treatment mechanism (20) comprises a flotation treatment housing shell (21) fixed on the ground and vertically extending, a rotary aeration mechanism (22) being provided at the bottom of the flotation treatment housing shell (21), a centrifugal stirring mechanism (23) being provided inside the flotation treatment housing shell (21), and an air flotation discharge mechanism (24) being provided at the top of the flotation treatment housing shell (21); The adsorption treatment mechanism (30) includes an adsorption treatment general housing (31), wherein a plurality of vertically extending adsorption treatment circulation cylinder shells (32) are fixed in the adsorption treatment circulation cylinder shell (31), an adsorption treatment circulation pipe (33) coaxially arranged therewith is fixed in the adsorption treatment circulation cylinder shell (32), and a plurality of coaxial adsorbent filling annular shells (34) are sheathed outside the adsorption treatment circulation pipe (33); A plurality of adsorption circulation input pipes (321) communicating with the interior of the adsorption treatment circulation cylinder shell (32) are fixed to the lower end of the outer side of the adsorption treatment circulation cylinder shell (32); The upper end of the adsorption treatment circulation pipe (33) extends upward to the outside of the adsorption treatment total accommodating shell (31), and the upper ends of the plurality of adsorption treatment circulation pipes (33) are connected to an adsorption treatment collection shell (35), and an adsorption treatment outer discharge pipe (351) connected to the interior of the adsorption treatment collection shell (35) is fixed to the outside of the adsorption treatment collection shell (35); The microorganism treatment mechanism (40) includes a microorganism treatment containing shell (41), wherein a plurality of microorganism containing spherical shells (42) are suspended in the microorganism treatment containing shell (41), a buoyancy spherical shell (43) concentric with the microorganism containing spherical shell (42) is fixed inside the microorganism containing spherical shell (42), and a microorganism filling cavity (420) is formed between the outer side surface of the buoyancy spherical shell (43) and the inner side surface of the microorganism containing spherical shell (42); The microorganism-filled cavity (420) is filled with a microorganism-attached filler (421); A spherical shell traction cable (422) is fixedly connected between the microorganism containing spherical shell (42) and the inner bottom of the microorganism processing containing shell (41).

2. The petroleum-contaminated groundwater remediation equipment according to claim 1, characterized in that: An air flotation treatment input pipe (211) and an air flotation treatment output pipe (212) are fixed to the outside of the air flotation treatment housing shell (21), which are connected to the inside of the housing. The air flotation treatment input pipe (211) is connected to the output end of the extraction and delivery pump (11). The adsorption treatment circulation pipe (33) is located inside the adsorption treatment circulation shell (32) and has a plurality of adsorption treatment circulation holes (330) on its side wall; An adsorption treatment main input pipe (311) connected to the interior of the adsorption treatment main containment shell (31) is fixed on the outside of the adsorption treatment main containment shell (31), and a backwash main output pipe (312) connected to the interior of the adsorption treatment main containment shell (31) is fixed on the outside of the adsorption treatment main containment shell (31); The adsorption treatment main input pipe (311) is connected to the flotation treatment output pipe (212); A microbial treatment input pipe (411) and a microbial treatment output pipe (412) communicating with the interior of the microbial treatment housing (41) are fixed to the outside of the microbial treatment housing (41); The microbial treatment input pipe (411) is connected to the adsorption treatment effluent pipe (351); A plurality of aeration and pressure relief pipes (413) connected to the interior of the microbial treatment housing (41) are fixed on the top of the housing; The microbial treatment output pipe (412) is connected to an ultrafiltration filter (414), and a repair injection well (101) connected to groundwater is drilled at the downstream end of the extraction well (10).

3. The petroleum-contaminated groundwater remediation equipment according to claim 1, characterized in that: The input end of the extraction and delivery pump (11) is provided with an input filtering mechanism (12), and the input filtering mechanism (12) comprises an input filtering fixed tube (121) fixed to the input end of the extraction and delivery pump (11) and extending vertically, an input filtering lifting tube (122) coaxial with the input filtering fixed tube (121) is slidably connected to the outside of the input filtering fixed tube (121), an input filtering support ring (123) coaxial with the input filtering lifting tube (122) is rotatably connected to the inside of the lower end of the input filtering lifting tube (122), an input filtering mesh shell (124) with an opening facing upward is fixed to the lower end of the input filtering support ring (123), and the side wall of the input filtering mesh shell (124) is a porous hollow structure with internal and external communication; A plurality of rotating drive blades (125) are fixed inside the input filter support ring (123); A filter lift fixed cylinder (126) with an opening facing downward is fixed in the extraction well (10), a filter lift sliding cylinder (127) with an opening facing upward is slidably connected in the filter lift fixed cylinder (126), and the lower end of the filter lift sliding cylinder (127) is fixedly connected to the input filter lift pipe (122); A filter lifting driving rod (128) for driving the filter lifting sliding cylinder (127) to move upward and downward is provided in the filter lifting fixed cylinder (126).

4. The petroleum-contaminated groundwater remediation equipment according to claim 1, characterized in that: The rotary aeration mechanism (22) comprises a rotary aeration conveying pipe shell (221) rotatably connected to the bottom of the air flotation treatment container shell (21) in a vertical direction, a plurality of radial connecting short pipes (222) extending radially and communicating with the interior of the rotary aeration conveying pipe shell (221) are fixed to the outside of the rotary aeration conveying pipe shell (221), and a rotary aeration pipe shell (223) coaxial with the radial connecting short pipe (222) is rotatably connected to the radial connecting short pipe (222); A rotating drive gear ring (224) coaxial with the rotating aeration tube shell (223) is fixed on the outside thereof, and a rotating matching fixed gear ring (225) coaxially arranged with the rotating aeration conveying tube shell (221) is provided on the outside thereof, and the rotating drive gear ring (224) is meshedly connected with the rotating matching fixed gear ring (225); A rotary drive support ring (220) coaxially arranged with the rotary aeration conveying pipe shell (221) is fixed to the inner bottom of the air flotation treatment containing cylinder shell (21), and the rotary matching fixed gear ring (225) is fixed to the top of the rotary drive support ring (220); An aeration input short pipe (226) communicating with the interior of the rotary aeration delivery pipe shell (221) is fixed on the top of the rotary aeration delivery pipe shell (221). The aeration input short pipe (226) is connected to an aeration main delivery pipe (228) via a rotary joint (227). The other end of the aeration main delivery pipe (228) extends to the outside of the flotation treatment accommodating cylinder shell (21).

5. The petroleum-contaminated groundwater remediation equipment according to claim 1, characterized in that: The centrifugal stirring mechanism (23) comprises a centrifugal stirring support ring (231) whose axis is arranged in a vertical direction and fixed on the inner side wall of the air flotation treatment container shell (21); a centrifugal stirring rotating ring (232) coaxial with the centrifugal stirring support ring (231) is rotatably connected to the centrifugal stirring rotating ring (232); a plurality of centrifugal stirring blades (233) are fixed inside the centrifugal stirring rotating ring (232); A vertically penetrating stirring limiting guide ring (213) is provided in the air flotation treatment accommodating cylinder shell (21) and below the centrifugal stirring rotating ring (232). The outer side of the stirring limiting guide ring (213) is fixedly connected to the inner side wall of the air flotation treatment accommodating cylinder shell (21) via a plurality of stirring limiting guide plates (214). The stirring limiting guide plates (214) are arranged to extend along the radial plane of the stirring limiting guide ring (213).

6. The petroleum-contaminated groundwater remediation equipment according to claim 1, characterized in that: The air flotation discharge mechanism (24) comprises an air flotation discharge guide pipe (241) vertically connected to the top of the air flotation treatment container shell (21) in a sliding manner; An air flotation lifting fixed cylinder (242) with an opening facing upward is fixed on the top of the air flotation treatment accommodating cylinder shell (21), an air flotation lifting sliding cylinder (243) with an opening facing downward is slidably connected inside the air flotation lifting fixed cylinder (242), and the upper end of the air flotation lifting sliding cylinder (243) is fixedly connected to the air flotation exhaust guide pipe (241); An air-floating lifting driving rod (244) for driving the air-floating lifting sliding cylinder (243) to move upward and downward is provided in the air-floating lifting fixed cylinder (242).

7. The petroleum-contaminated groundwater remediation equipment according to claim 1, characterized in that: A plurality of backwash inlet pipes (313) connected to the interior of the adsorption treatment circulation pipe (33) are fixed to the outside of one end of the adsorption treatment circulation pipe (33) extending to the outside of the adsorption treatment main containing shell (31); The side wall of the adsorbent-filled ring shell (34) is a porous hollow structure with internal and external communication; The top of the adsorbent filling ring shell (34) is provided with an outward convex snap ring (341) near the inner side, and the bottom of the adsorbent filling ring shell (34) is provided with an inward concave snap fitting groove (342) near the inner side; The outwardly convex snap ring (341) on the top of the adsorbent filling ring shell (34) is snap-fitted into the inwardly concave snap-fitting groove (342) on the bottom of an adjacent adsorbent filling ring shell (34).

8. The petroleum-contaminated groundwater remediation equipment according to claim 1, characterized in that: A plurality of microbial aeration spherical shells (44) are fixed to the bottom of the microbial treatment containment shell (41); a microbial dispersion aeration shell (442) is provided on the outside of the microbial aeration spherical shell (44) and is connected to the microbial aeration short tube (441); and a plurality of dispersion aeration micropores (4420) are provided on the side wall of the microbial dispersion aeration shell (442); A microbial aeration delivery pipe (443) communicating with the interior of the microbial aeration ball shell (44) is fixed to the lower side of the microbial aeration ball shell (44).

9. The petroleum-contaminated groundwater remediation equipment according to claim 1, characterized in that: The microorganism treatment containment shell (41) is provided with a wave-making mechanism (45), the wave-making mechanism (45) comprising a wave-making mechanism support cylinder (451) which is horizontally placed and fixed on the side wall of the microorganism treatment containment shell (41) with its opening facing inward, a wave-making mechanism sliding cylinder (452) which is arranged opposite to its opening is slidably connected in the wave-making mechanism support cylinder (451), and a wave-making mechanism driving plate (453) arranged along a vertical plane is fixed to one end of the wave-making mechanism sliding cylinder (452) which is located inside the microorganism treatment containment shell (41); A wave-making drive rod (454) for driving the wave-making mechanism sliding cylinder (452) to move is provided in the wave-making mechanism support cylinder (451).

10. A method for remediating petroleum-contaminated groundwater, based on the petroleum-contaminated groundwater remediation equipment according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1. Construction of extraction wells: Drilling an extraction well (10) connected to the groundwater at the upstream end of the groundwater contaminated area, placing an extraction delivery pump (11) in the extraction well (10), and making the input end of the extraction delivery pump (11) connected to the groundwater; Using the conveying function of the extraction and delivery pump (11), the groundwater is injected into the interior of the flotation treatment container shell (21) through the flotation treatment input pipe (211); S2. Flotation treatment of groundwater: A rotary aeration mechanism (22) is used to aerate the groundwater in the flotation treatment housing shell (21), and the resulting tiny bubbles move from bottom to top in the flotation treatment housing shell (21). These tiny bubbles adhere to the oil droplets in the groundwater, forcing the oil droplets in the groundwater to move upward along with the tiny bubbles and eventually float on the water surface in the flotation treatment housing shell (21); The groundwater in the air flotation treatment container shell (21) is driven to rotate by a centrifugal stirring mechanism (23). Under the centrifugal action, the groundwater moves toward a position close to the inner wall of the air flotation treatment container shell (21), forcing the oil droplets attached with tiny bubbles to gather at the center of the air flotation treatment container shell (21). Finally, the oil droplets attached with tiny bubbles gathered at the center of the air flotation treatment container shell (21) are sucked out by an air flotation discharge mechanism (24). S3. Filtration and adsorption treatment of groundwater: The groundwater after the flotation treatment is discharged through the flotation treatment output pipe (212) and input into the interior of the adsorption treatment main containing shell (31) through the adsorption treatment main input pipe (311); The groundwater in the adsorption treatment total containment shell (31) enters the adsorption treatment circulation shell (32) through the adsorption circulation input pipe (321). The groundwater circulates from bottom to top in the adsorption treatment circulation shell (32). While the groundwater circulates from bottom to top in the adsorption treatment circulation shell (32), it also circulates radially through each adsorbent-filled annular shell (34) toward the adsorption treatment circulation pipe (33). When the groundwater passes through each adsorbent-filled annular shell (34), the activated carbon adsorbent filled in the adsorbent-filled annular shell (34) is used to adsorb and filter oil droplets in the groundwater. The groundwater after adsorption filtration passes through the adsorption treatment circulation holes (330) and enters the adsorption treatment circulation pipe (33) and circulates in a bottom-up direction. Finally, the groundwater in the multiple adsorption treatment circulation pipes (33) is collected in the adsorption treatment collection shell (35); S4. Microbial purification of groundwater: The groundwater after the filtration and adsorption treatment is discharged through the adsorption treatment external discharge pipe (351) and input into the microbial treatment containing shell (41) through the microbial treatment input pipe (411); The plurality of microorganism-containing spherical shells (42) are suspended and immersed in groundwater, and the groundwater can enter the microorganism-filled cavity (420) through the porous hollow structure of the microorganism-containing spherical shell (42), and the microorganisms on the microorganism-attached filler (421) are used to decompose petroleum substances in the groundwater, thereby achieving the purpose of purifying water quality; S5. The purified groundwater is injected back into the ground: The groundwater after microbial purification is discharged through the microbial treatment output pipe (412), and the ultrafiltration filter (414) is used to filter and intercept microorganisms in the groundwater. The output end of the ultrafiltration filter (414) is extended to the inside of the repair injection well (101) through a pipeline and connected to the groundwater, thereby re-injecting the purified groundwater back into the ground.

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