Remediation device for oil-contaminated soil

Abstract

The invention belongs to the technical field of soil remediation, and relates to an oily soil remediation device which comprises a mixing module, an ultrasonic module, a centrifugal module and a separation module which are connected in sequence. The mixing module is used for carrying out mixing treatment on the oily soil and the remediation liquid to obtain a chemical mixture; the ultrasonic module is connected with the transmitting module and is used for performing ultrasonic treatment on the chemical mixture under the action of the grinding beads transmitted by the transmitting module to obtain an ultrasonic mixture; the grinding beads have different sizes and are matched with the molecular weight of the repairing liquid; the centrifugal module is used for performing centrifugal treatment on the ultrasonic mixture to obtain centrifugal liquid; and the separation module is used for carrying out separation treatment on the centrifugate to obtain water and oil substances so as to complete remediation of the oil-contaminated soil. With the adoption of the method, water and oil substances can be effectively separated and recycled from the oil-contaminated soil.

Description

Technical Field

[0001] This application relates to the technical field of soil remediation, and particularly to a remediation device for oil-contaminated soil. Background Art

[0002] Currently, the research on the characteristics of oil sludge and oil-contaminated soil and the development of their recycling methods are the focus of global attention. Due to the substantial increase in oil and gas production, the waste treatment generated by related enterprise activities has become an important and urgent environmental problem. During the drilling process, drill cuttings containing hydrocarbons, heavy metals, and polymers will seriously pollute the soil and water, and oil spills during the oil production process will bring many negative impacts, resulting in soil damage and large-scale oil pollution.

[0003] In the existing oil-contaminated soil remediation technologies, the leaching method is an effective physicochemical means, and flocculants are added for the separation and recovery of oil.

[0004] However, this method still faces problems such as uneven flocculation effect and reagent waste in application, which limits the further improvement of the treatment efficiency. Summary of the Invention

[0005] Based on this, in view of the above technical problems, it is necessary to provide a remediation device for oil-contaminated soil, which can effectively separate and recover water and oil substances from oil-contaminated soil, and improve the soil remediation effect and remediation efficiency.

[0006] A remediation device for oil-contaminated soil includes, connected in sequence: a mixing module, an ultrasonic module, a centrifugation module, and a separation module; The mixing module is used for mixing oil-contaminated soil and a remediation liquid, and obtaining a chemical mixture; The ultrasonic module is connected to an emission module, and is used for ultrasonically treating the chemical mixture under the action of abrasive beads emitted by the emission module, and obtaining an ultrasonic mixture; the abrasive beads have different sizes and match the molecular weight of the remediation liquid; The centrifugation module is used for centrifuging the ultrasonic mixture and obtaining a centrifugate; The separation module is used for separating the centrifugate and obtaining water and oil substances to complete the remediation of oil-contaminated soil.

[0007] In one embodiment, the mixing module includes: a first conveyor, a storage tank, and a mixing tank; The first conveyor is arranged above the mixing tank and is used for conveying oil-contaminated soil to the mixing tank; The storage tank is arranged above the mixing tank and is used for storing the remediation liquid and placing the remediation liquid into the mixing tank; The mixing tank is used for mixing the repair liquid and the oily soil to obtain a chemical mixture.

[0008] In one embodiment, the mixing module further includes: a stirrer; The stirrer is arranged in the mixing tank for stirring the chemical mixture.

[0009] In one embodiment, the launching module includes, connected in sequence: a gas tank, a gas valve, a control valve, and a hopper; The gas tank is used for storing gas to provide aerodynamic force; The gas valve is used for controlling the opening and closing of the gas tank; The control valve is used for controlling the opening and closing of the hopper; The hopper is used for storing abrasive beads, and when the control valve is opened, the abrasive beads are launched to the ultrasonic module under the action of the gas tank.

[0010] In one embodiment, there is also a recovery module arranged between the ultrasonic module and the centrifugal module for recovering the abrasive beads; The recovery module includes: a magnetic plate and a vibrating screen; The magnetic plate is arranged between the ultrasonic module and the centrifugal module to suck out the abrasive beads in the ultrasonic mixture by magnetic force and transport them to the vibrating screen; The vibrating screen has multiple layers for screening abrasive beads of different sizes and transporting them to different hoppers.

[0011] In one embodiment, the ultrasonic module includes, connected: a first pump and an ultrasonic reactor; The first pump is used for pumping the chemical mixture into the ultrasonic reactor; The ultrasonic reactor includes: a cavity, an electroacoustic transducer, and an ultrasonic generator; One end of the cavity is respectively connected to the electroacoustic transducer and the ultrasonic generator; the cavity is provided with a pumping inlet, a launching inlet, and an outlet. The pumping inlet is connected to the mixing module, the launching inlet is connected to the launching module, and the outlet is connected to the centrifugal module; The electroacoustic transducer is used for energy conversion from electrical energy to acoustic energy; The ultrasonic generator is used for generating ultrasonic waves. In one embodiment, the ultrasonic reactor further includes: a waveguide; The interior of the cavity is hollow to form an accommodation space; the waveguide is arranged in the accommodation space and is connected to one end of the cavity for adjusting the frequency and amplitude of the waveform of the sound wave.

[0012] In one embodiment, the waveguide is a rod-shaped structure, and a stepped structure is provided on a partial cross-section of the rod-shaped structure.

[0013] In one embodiment, the centrifugation module includes: a hydrocyclone, a centrifuge, a second conveyor, and a centrifugate collection tank; The hydrocyclone is disposed above the centrifuge to place the ultrasonic mixture into the centrifuge; The centrifuge is used to centrifuge the ultrasonic mixture to obtain the repaired soil and the centrifugate, and place the repaired soil on the second conveyor and place the centrifugate in the centrifugate collection tank; The second conveyor is disposed below the centrifuge and is used to convey the repaired soil out; The centrifugate collection tank is used to collect the centrifugate.

[0014] In one embodiment, the separation module includes: a second pump, a separator, a water tank, and an oil tank; The second pump is respectively connected to the centrifugation module and the separator to pump the centrifugate into the separator; The separator is respectively connected to the water tank and the oil tank to separate the centrifugate into water and oil substances and place them in the water tank and the oil tank respectively; The water tank is used to collect water; The oil tank is used to collect oil substances.

[0015] The above-mentioned oil-contaminated soil remediation device matches grinding beads of corresponding diameters for flocculants of different molecular weights according to the different characteristics of flocculants of different molecular weights in the elution process, and uses grinding beads of different diameters to collide with flocculants of different molecular weights. High molecular weight flocculants are matched with grinding beads of diameter A to enhance their dispersion effect, provide higher shear force, enhance the dispersibility and activity of the flocculants, and avoid agglomeration; low molecular weight flocculants are matched with grinding beads of diameter B to provide higher collision energy and accelerate their combination with polluted particles; medium molecular weight flocculants are matched with grinding beads of diameter C to increase the flocculation reaction rate; and the diameters of the grinding beads satisfy A:B:C=1:3:2, so as to perform efficient flocculation and separation, realize the remediation of oil-contaminated soil, and significantly improve the flocculation effect and Separation efficiency; in the cavity of the ultrasonic reactor, the flocculant and the grinding beads fully collide and mix under the action of ultrasonic vibration, and the ultrasonic energy is used to separate the oil particles from the soil, further enhancing the dispersion and effect of the flocculant, thereby achieving a better match of flocculants with different molecular weights and grinding beads and a high-efficiency flocculation effect; in the process of treating oily soil, the oily soil and the flocculant are fully mixed, thereby optimizing the use effect of flocculants with different molecular weights, which not only significantly improves the flocculation efficiency, accelerates the coagulation of oil particles and the separation of soil particles, but also reduces the amount of flocculant used, reduces the treatment cost, and improves the economy and environmental protection of the treatment process. At the same time, it greatly improves the remediation efficiency of oily soil and the utilization rate of reagents, providing reliable technical support for efficient and environmentally friendly soil remediation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of a device for repairing oil-contaminated soil in one embodiment; Figure 2 The figure is a schematic diagram of an ultrasonic reactor in a device for repairing oil-contaminated soil in one embodiment.

[0017] Reference numerals: The first conveyor 1, the mixing tank 2, the storage tank 3, the agitator 4, the first pump 5, the ultrasonic reactor 6, the magnetic plate 7, the hydrocyclone 8, the centrifuge 9, the second conveyor 10, the centrifuge collection tank 11, the second pump 12, the separator 13, the water tank 14, the oil tank 15, the ultrasonic generator 16, the electroacoustic transducer 17, the waveguide 18, the cavity 19, the outlet 20, the pumping inlet 21, the launching inlet 22, the vibrating screen 23, the hopper 24, the control valve 25, the pressure sensor 26, the gas valve 27, and the gas tank 28. DETAILED DESCRIPTION

[0018] In order to make the objectives, technical solutions and advantages of the present application clearer and more understandable, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts fall within the scope of protection of the present application.

[0019] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0020] In addition, in the present application, descriptions such as "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present application, the meaning of "multiple groups" is at least two groups, such as two groups, three groups, etc., unless otherwise specifically and clearly defined.

[0021] In the present application, unless otherwise clearly defined and limited, terms such as "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, an electrical connection, a physical connection or a wireless communication connection; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0022] In addition, the technical solutions between the various embodiments of the present application can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present application.

[0023] The present application provides a device for repairing oil-contaminated soil. As Figure 1 and Figure 2 shown, in one embodiment, it includes: a mixing module, an ultrasonic module, a centrifugal module, a separation module, a transmitting module, and a recycling module. Among them, the mixing module, the ultrasonic module, the centrifugal module, and the separation module are connected in sequence, the transmitting module is connected to the ultrasonic module, and the recycling module is arranged between the ultrasonic module and the centrifugal module. 1. Mixing module.

[0024] The mixing module is used to mix the oil-contaminated soil and the remediation liquid to obtain a chemical mixture. The mixing module includes: a first conveyor, a storage tank, a mixing tank, and a stirrer.

[0025] 1) The first conveyor 1 is arranged above the mixing tank and is used to convey the oil-contaminated soil to the mixing tank. The first conveyor is equipped with a weight sensor to ensure that the ratio of soil to liquid is within a preset range.

[0026] 2) The storage tank 3 is arranged above the mixing tank and is used to store the remediation liquid, and the remediation liquid is evenly placed into the mixing tank through a pipeline equipped with a temperature sensor and a flow controller; specifically, the remediation liquid can be a flocculant.

[0027] 3) The mixing tank 2 is used for mixing the remediation liquid and the oil-contaminated soil to obtain a chemical mixture.

[0028] 4) The stirrer 4 is arranged in the mixing tank to stir the chemical mixture to ensure thorough mixing and uniform concentration. For example, the stirrer uses a propeller stirrer.

[0029] 2. The ultrasonic module.

[0030] The ultrasonic module is used to perform ultrasonic treatment on the chemical mixture under the action of the grinding beads emitted by the emission module to obtain an ultrasonic mixture. The ultrasonic module includes: a first pump and an ultrasonic reactor.

[0031] 1) The first pump 5 is respectively connected to the mixing tank and the ultrasonic reactor and is used to pump the chemical mixture into the ultrasonic reactor.

[0032] 2) The ultrasonic reactor 6 is used to perform ultrasonic treatment and activation on the chemical mixture under the action of the grinding beads emitted by the emission module to obtain an ultrasonic mixture and avoid precipitation in conventional stirring. The ultrasonic reactor is a tubular ultrasonic flow reactor, including: an electro-acoustic transducer, an ultrasonic generator, a cavity, and a waveguide.

[0033] The electro-acoustic transducer 17 is arranged at one end of the cavity and is used for energy conversion from electrical energy to acoustic energy, and there can be multiple, for example, 4.

[0034] The ultrasonic generator 16 is arranged at one end of the cavity and inside the electro-acoustic transducer and is used to generate ultrasonic waves.

[0035] One end of the cavity 19 is respectively connected to the electro-acoustic transducer and the ultrasonic generator; the cavity is provided with a pumping inlet 21, an emission inlet 22, and an outlet 20. The pumping inlet is connected to the mixing module, the emission inlet is connected to the emission module, and the outlet is connected to the centrifugal module.

[0036] The interior of the cavity is hollow to form a receiving space; a waveguide 18 is arranged in the receiving space and connected to an ultrasonic generator at one end of the cavity, and is used to adjust the frequency and amplitude of the waveform of the sound wave; the waveguide is in a rod-shaped structure, and a stepped structure perpendicular to the axial direction of the rod-shaped structure is provided on a part of the cross-section of the rod-shaped structure, so that the mixture is exposed to the area of the ultrasonic wave, enabling each volume unit to be fully mixed, ensuring the mixing in the ultrasonic impact area, and thus strengthening the grinding process.

[0037] 3. Centrifugation module.

[0038] The centrifugation module is used to perform centrifugation on the ultrasonic mixture to obtain centrifugate. The centrifugation module includes: a hydrocyclone, a centrifuge, a second conveyor, and a centrifugate collection tank.

[0039] 1) The hydrocyclone 8 is connected to the ultrasonic module and arranged above the centrifuge to place the ultrasonic mixture in the centrifuge, and is also used to preliminarily process the particles of the ultrasonic mixture and can continuously purify the water flow.

[0040] 2) The centrifuge 9 is used to centrifuge the ultrasonic mixture to obtain the repaired soil and the centrifugate (oil-water mixture), place the repaired soil on the second conveyor and the centrifugate in the centrifugate collection tank, and is also used to further process the particles of the ultrasonic mixture to reduce the soil particle size.

[0041] 3) The second conveyor 10 is arranged below the centrifuge and is used to convey the repaired soil out.

[0042] 4) The centrifugate collection tank 11 is arranged below the centrifuge and is used to collect the centrifugate.

[0043] 4. Separation module.

[0044] The separation module is used to perform separation on the centrifugate to obtain water and oil substances to complete the repair of the oil-polluted soil. The separation module includes: a second pump, a separator, a water tank, and an oil tank.

[0045] 1) The second pump 12 is respectively connected to the centrifugate collection tank of the centrifugation module and the separator of the separation module to pump the centrifugate into the separator.

[0046] 2) The separator 13 is respectively connected to the water tank and the oil tank to separate the centrifugate into water and oil substances and place them in the water tank and the oil tank respectively.

[0047] 3) The water tank 14 is used to collect water.

[0048] 4) The oil tank 15 is used to collect oil substances.

[0049] 5. Emission module.

[0050] The emission module is used to emit abrasive beads to the ultrasonic module to enhance the dispersion and reaction effect of the flocculant. The emission module includes: a gas tank, a gas valve, a pressure sensor, a control valve, a hopper, and an air pipe. Abrasive beads are provided in the hopper.

[0051] 1) The gas tank 28 is connected to the air pipe and is used to store gas (such as nitrogen) to provide aerodynamic force through air pressure.

[0052] 2) The gas valve 27 is connected to the gas tank and is used to control the opening and closing of the gas tank to control whether gas enters the air pipe.

[0053] 3) The pressure sensor 26 is provided on the air pipe at the position corresponding to between the gas valve and the control valve and is used to detect the air pipe pressure.

[0054] 4) The control valve 25 is connected to the hopper and is used to control the opening and closing of the hopper to control whether the abrasive beads enter the air pipe.

[0055] 5) The hopper 24 is used to store and recycle the abrasive beads to emit the abrasive beads to the ultrasonic module under the action of the gas tank when the control valve is opened.

[0056] 6) The air pipe is respectively connected to the gas tank and the emission inlet of the upper cavity of the ultrasonic module so that the gas drives the abrasive beads to shoot into the ultrasonic reactor along the air pipe.

[0057] 7) The abrasive beads have different sizes and are matched with the molecular weight of the repair fluid. The abrasive beads can be made of metal materials, such as steel beads.

[0058] 6. Recycling module.

[0059] The recycling module is used to automatically recycle the used abrasive beads for reuse, forming a closed-loop recycling, avoiding the frequent replacement of the abrasive beads, not only extending the service life of the device, but also greatly reducing the operation cost and increasing the stability and sustainability of the system. The recycling module includes: a magnetic plate and a vibrating screen.

[0060] 1) The magnetic plate 7 is provided between the ultrasonic module and the centrifugal module to suck out the abrasive beads in the ultrasonic mixture by magnetic force and transport them to the vibrating screen.

[0061] 2) The vibrating screen 23 is connected to the magnetic plate and has multiple layers of screen meshes to screen abrasive beads of different sizes and transport them to different hoppers according to different sizes.

[0062] In one embodiment, the molecular weight of the flocculant is matched with grinding beads of different sizes; specifically: when using a high molecular weight flocculant (molecular weight greater than 1 million), it is used in combination with small diameter grinding beads (for example, grinding beads with a diameter of 0.5 mm); when using a low molecular weight flocculant (molecular weight less than 100,000), it is used in combination with large diameter grinding beads (for example, grinding beads with a diameter of 1.5 mm); when using a medium molecular weight flocculant (molecular weight between 100,000 and 1 million), it is used in combination with medium diameter grinding beads (for example, grinding beads with a diameter of 1 mm). Grinding beads of different sizes are matched with a multi-layer vibrating screen; specifically: 0.5 mm grinding beads are matched with a screen with a pore size of 0.7 mm, 1 mm grinding beads are matched with a screen with a pore size of 1.2 mm, and 1.5 mm grinding beads are matched with a screen with a pore size of 1.7 mm.

[0063] The working process of this embodiment is as follows: 1) The first conveyor transports the oily soil or oil sludge to the mixing pool. The oily soil accounts for 50 - 60% of the total volume of the mixture. The storage tank transports the stored repair liquid (such as a flocculant) evenly into the mixing pool through a pipeline installed at the top of the mixing pool. The repair liquid accounts for 40 - 50%. A propeller stirrer is installed at the top of the mixing pool. First, it is preliminarily stirred at a medium speed (150 - 300 rad / min) for 5 minutes, and then stirred at a high speed (600 - 900 rad / min) for 10 minutes to fully mix the oily soil and the repair liquid to form a chemical mixture. 2) The first pump pumps the chemical mixture from the mixing pool into the cavity of the ultrasonic reactor. According to the molecular weight of the added flocculant, the control valve of the grinding bead hopper with the corresponding diameter is opened to select the grinding beads with the matching diameter, so that the gas tank shoots the grinding beads from the hopper into the cavity of the ultrasonic reactor. A waveguide is installed in the cavity, and the waveguide is connected to the electro-acoustic transducer to generate an ultrasonic frequency, thereby causing the grinding of the mixture. The capacity of the ultrasonic reactor is 0.7 m 3 / min, the working frequency is 18 - 27 kHz, and the ultrasonic treatment is carried out for 5 - 10 minutes to form an ultrasonic mixture. 3) The ultrasonic mixture is preliminarily separated into solid and liquid through a hydrocyclone for 30 minutes, and then enters a centrifuge. The centrifuge operates at 5000 rad / min and is centrifuged for 5 - 10 minutes to separate the ultrasonic mixture into repaired soil and centrifugate. The repaired soil is transported out by the second conveyor at the bottom of the centrifuge, and the centrifugate is collected by the centrifugate collection tank at the bottom of the centrifuge. 4) The second pump pumps the centrifugate from the centrifugate collection tank into the separator. The separator separates the centrifugate into water and oil substances. The water is collected through the water tank at the bottom of the separator and can be further used. The oil substances are collected through the oil tank at the bottom of the separator and can be further processed for petroleum products.

[0064] In the present application, chemical materials are treated from the perspective of chemistry and structure, which can effectively separate and recover oil substances in the soil from oil-contaminated soil, and at the same time realize water recycling, reduce the use of chemical agents, and improve automation and operation efficiency; by installing a container with equipment on a truck powered by a generator using diesel or gasoline or on a processing site, the consumption of chemical agents used in the separation can be reduced, the control process is fully automated and the number of operators is minimized, and it has the advantages of mobility, autonomy, low operating costs and high efficiency; the device has mobility and autonomy, and is suitable for on-site treatment of oil-contaminated soil, and the treated sludge and oil can be further processed; the solid phase containing residual petroleum products can be further processed and used as raw materials for manufacturing road surfaces or building materials. The present invention can make the oil-contaminated soil used as a lubricating additive for drilling fluid after treatment, thereby replacing crude oil, and the treated sludge can be used as an isolation fluid to separate oil-based drilling fluid from water-based mud.

[0065] The above-mentioned oil-contaminated soil remediation device matches grinding beads of corresponding diameters for flocculants of different molecular weights according to the different characteristics of flocculants of different molecular weights in the elution process, and uses grinding beads of different diameters to collide with flocculants of different molecular weights. High molecular weight flocculants are matched with grinding beads of diameter A to enhance their dispersion effect, provide higher shear force, enhance the dispersibility and activity of the flocculants, and avoid agglomeration; low molecular weight flocculants are matched with grinding beads of diameter B to provide higher collision energy and accelerate their combination with polluted particles; medium molecular weight flocculants are matched with grinding beads of diameter C to increase the flocculation reaction rate; and the diameters of the grinding beads satisfy A:B:C=1:3:2, so as to perform efficient flocculation and separation, realize the remediation of oil-contaminated soil, and significantly improve the flocculation effect and Separation efficiency; in the cavity of the ultrasonic reactor, the flocculant and the grinding beads fully collide and mix under the action of ultrasonic vibration, and the ultrasonic energy is used to separate the oil particles from the soil, further enhancing the dispersion and effect of the flocculant, thereby achieving a better match of flocculants with different molecular weights and grinding beads and a high-efficiency flocculation effect; in the process of treating oily soil, the oily soil and the flocculant are fully mixed, thereby optimizing the use effect of flocculants with different molecular weights, which not only significantly improves the flocculation efficiency, accelerates the coagulation of oil particles and the separation of soil particles, but also reduces the amount of flocculant used, reduces the treatment cost, and improves the economy and environmental protection of the treatment process. At the same time, it greatly improves the remediation efficiency of oily soil and the utilization rate of reagents, providing reliable technical support for efficient and environmentally friendly soil remediation.

[0066] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0067] The technical features of the above embodiments can be combined arbitrarily. For the sake of concise description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0068] The above-described embodiments merely represent several implementation manners of the present application. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the present application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the appended claims.

Claims

1. A device for repairing oil-polluted soil, characterized in that, It includes, connected in sequence: a mixing module, an ultrasonic module, a centrifugation module, and a separation module; The mixing module is used for mixing the oil-polluted soil and the remediation liquid, and obtaining a chemical mixture; The ultrasonic module is connected to the emission module, and is used for ultrasonically treating the chemical mixture under the action of the abrasive beads emitted by the emission module, and obtaining an ultrasonic mixture; the abrasive beads have different sizes and are matched with the molecular weight of the remediation liquid; The centrifugation module is used for centrifuging the ultrasonic mixture and obtaining a centrifugate; The separation module is used for separating the centrifugate and obtaining water and oil substances to complete the remediation of the oil-polluted soil.

2. The remediation device for oil-contaminated soil according to claim 1, wherein The mixing module includes: a first conveyor, a storage tank, and a mixing pool; The first conveyor is arranged above the mixing pool and is used for conveying the oil-polluted soil to the mixing pool; The storage tank is arranged above the mixing pool and is used for storing the remediation liquid and placing the remediation liquid into the mixing pool; The mixing pool is used for mixing the remediation liquid and the oil-polluted soil to obtain a chemical mixture.

3. The remediation device for oil-contaminated soil according to claim 2, wherein, The mixing module further includes: a stirrer; The stirrer is arranged in the mixing pool for stirring the chemical mixture.

4. A device for repairing oil-polluted soil according to any one of claims 1 to 3, characterized in that, The emission module includes, connected in sequence: a gas tank, a gas valve, a control valve, and a hopper; The gas tank is used for storing gas to provide gas power; The gas valve is used for controlling the opening and closing of the gas tank; The control valve is used for controlling the opening and closing of the hopper; The hopper is used for storing abrasive beads and, when the control valve is opened, emitting the abrasive beads to the ultrasonic module under the action of the gas tank.

5. The remediation device for oil-contaminated soil according to claim 4, wherein It further includes a recovery module arranged between the ultrasonic module and the centrifugation module for recovering the abrasive beads; The recovery module includes: a magnetic plate and a vibrating screen; The magnetic plate is arranged between the ultrasonic module and the centrifugation module to suck out the abrasive beads in the ultrasonic mixture by magnetic force and convey them to the vibrating screen; The vibrating screen has multiple layers for screening abrasive beads of different sizes and conveying them to different hoppers according to different sizes.

6. A remediation device for oil-contaminated soil according to any one of claims 1 to 3, characterized in that, The ultrasonic module includes: a first pump and an ultrasonic reactor connected; The first pump is used for pumping the chemical mixture into the ultrasonic reactor; The ultrasonic reactor includes: a cavity, an electroacoustic transducer, and an ultrasonic generator; One end of the cavity is respectively connected to the electroacoustic transducer and the ultrasonic generator; the cavity is provided with a pumping inlet, an emission inlet, and an outlet, the pumping inlet is connected to the mixing module, the emission inlet is connected to the emission module, and the outlet is connected to the centrifugation module; The electroacoustic transducer is used for energy conversion from electrical energy to acoustic energy; The ultrasonic generator is used for generating ultrasonic waves.

7. The remediation device for oil-contaminated soil according to claim 6, characterized in that, The ultrasonic reactor further includes: a waveguide; The interior of the cavity is hollow to form a containing space; the waveguide is arranged in the containing space and is connected to one end of the cavity for adjusting the frequency and amplitude of the waveform of the sound wave.

8. The remediation device for oily soil according to claim 7, characterized in that, The waveguide is a rod-shaped structure, and part of the cross-section of the rod-shaped structure has a stepped structure.

9. A device for repairing oil-polluted soil according to any one of claims 1 to 3, characterized in that, The centrifugation module includes: a hydrocyclone, a centrifuge, a second conveyor, and a centrifugate collection pool; The hydrocyclone is arranged above the centrifuge to place the ultrasonic mixture into the centrifuge; The centrifuge is used to centrifuge the ultrasonic mixture to obtain the repaired soil and the centrifugate, and place the repaired soil on the second conveyor and the centrifugate in the centrifugate collection tank; The second conveyor is arranged below the centrifuge and is used to convey the repaired soil out; The centrifugate collection tank is used to collect the centrifugate.

10. A device for repairing oil-polluted soil according to any one of claims 1 to 3, characterized in that, The separation module includes: a second pump, a separator, a water tank and an oil tank; The second pump is respectively connected to the centrifugation module and the separator to pump the centrifugate into the separator; The separator is respectively connected to the water tank and the oil tank to separate the centrifugate into water and oil substances and place them in the water tank and the oil tank respectively; The water tank is used to collect water; The oil tank is used to collect oil substances.

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