Oily sludge treatment device

Abstract

The invention discloses an oily sludge treatment device, which belongs to the technical field of oil pollution treatment, and comprises a mobile module, a collecting and transporting module, a supercritical CO2 extraction module and an extract separation and recovery module; the mobile module comprises a movable walking part and a supporting platform transmission-connected to the walking part, and the collecting and transporting module, the supercritical CO2 extraction module and the extract separation and recovery module are installed on the supporting platform; the collecting and transporting module comprises a collecting part, and the supercritical CO2 extraction module has a first inlet connected to the collecting part, a second inlet connected to a CO2 supply source, and a first outlet; the extract separation and recovery module has a third inlet connected to the first outlet, a second outlet for discharging oil, a third outlet for discharging sludge and a fourth outlet for discharging CO2; the oily sludge is treated on-site at the pollution site, so as to shorten the treatment cycle, improve the treatment efficiency, reduce the risk of long-distance transportation of pollutants, and meet the urgent needs of on-site emergency treatment and oil pollution control in remote areas.

Description

Technical Field

[0001] The invention relates to the technical field of oil pollution treatment, in particular to an oily sludge treatment device. Background Art

[0002] Oily sludge is a byproduct of oil extraction, refining, storage and transportation, containing a large amount of harmful substances such as petroleum hydrocarbons, heavy metals, organic pollutants and pathogens. With the increase of industrial activities, the generation sites of oily sludge are becoming more and more dispersed. It not only occupies a large amount of land resources, but also easily causes serious pollution to the soil, groundwater and surrounding ecological environment if not properly handled, threatening human health and ecological balance. Therefore, the effective treatment and resource utilization of oily sludge has become a research hotspot in the field of environmental protection and resource recovery.

[0003] Traditional treatment methods for oily sludge include landfill, incineration and chemical and physical methods, which have significant limitations: although landfill is simple and direct, it occupies land resources for a long time, which not only wastes resources but also poses a potential risk of soil and groundwater pollution; although incineration can significantly reduce the amount, it has high energy consumption and may produce toxic gases such as dioxins during the incineration process, aggravating air pollution; chemical and physical methods (such as flocculation, flotation, pyrolysis, etc.) have high treatment costs and often require subsequent disposal of waste, and the process is complicated. In addition, this type of chemical and physical methods mostly adopts a centralized treatment model, which faces problems such as high transportation costs and untimely treatment. Especially in emergencies or remote areas, the immediate treatment of oily sludge becomes a major challenge.

[0004] In recent years, supercritical fluid extraction technology has gradually become a new direction for the treatment of oily sludge due to its unique solvent properties and environmental friendliness. Supercritical CO2 (carbon dioxide in a supercritical state) is a green solvent with the advantages of low toxicity, no residue, and easy recycling. It is suitable for extracting oil from oily sludge while reducing the release of harmful substances. However, most of the existing supercritical CO2 extraction devices are fixed, and the oily sludge needs to be transported to the treatment plant before it can be treated. This process not only increases transportation costs, but also prolongs the treatment cycle and reduces emergency response capabilities. This problem is particularly prominent in remote areas or accident sites.

[0005] Therefore, how to design an oily sludge treatment device that can be directly driven to the pollution site to achieve on-site real-time treatment of oily sludge is a technical problem that technical personnel in this field urgently need to solve. Summary of the invention

[0006] The purpose of the present invention is to provide an oily sludge treatment device to address the defects and shortcomings in the prior art, so as to realize on-site treatment of oily sludge at the pollution site, shorten the treatment cycle, improve the treatment efficiency, reduce the risk of long-distance transportation of pollutants, and meet the urgent needs of on-site emergency treatment and oil pollution control in remote areas.

[0007] To achieve the above object, the technical solution adopted by the present invention is:

[0008] The present invention provides an oily sludge treatment device, comprising a mobile module, a collection and transportation module, a supercritical CO2 extraction module and an extract separation and recovery module;

[0009] The mobile module includes a movable walking part and a supporting platform connected to the walking part by transmission, and the collection and transportation module, the supercritical CO2 extraction module and the extract separation and recovery module are installed on the supporting platform;

[0010] The collecting and transporting module comprises a collecting portion for collecting sludge, the supercritical CO2 extraction module comprises a first inlet for oily sludge to enter, a second inlet for supercritical CO2 to enter, and a first outlet for a mixture of oily sludge and supercritical CO2 to discharge, the first inlet is connected to the collecting portion;

[0011] The extract separation and recovery module has a third inlet for a mixture of oily sludge and supercritical CO2 to enter, a second outlet for discharging separated oil, a third outlet for discharging separated sludge and a fourth outlet for discharging separated CO2, and the third inlet is connected to the first outlet.

[0012] Preferably, the collecting and transporting module further comprises a conveying portion for transporting the material in the collecting portion to the first inlet, and the conveying portion is detachably connected to the supporting platform.

[0013] Preferably, the collecting part is a bucket-shaped structure installed at one end of the conveying part away from the supporting platform, and the conveying part is a mechanical arm that can rotate around the xyz axis, and the mechanical arm is detachably connected to the supporting platform.

[0014] Preferably, the mechanical arm comprises a main arm and a secondary arm, and the main arm and the secondary arm are connected by a telescopic mechanism to achieve telescopic and folding.

[0015] Preferably, the collecting part is an adsorption device, which includes a conveying pipe, a suction cup and a negative pressure device. The conveying pipe is detachably connected to the supporting platform, the suction cup is arranged at one end of the conveying pipe away from the supporting platform, the negative pressure generating port of the negative pressure device is opposite to the conveying pipe, and the fixed negative pressure device is located on the side of the conveying pipe away from the suction cup, a channel for material flow is provided between the negative pressure generating port and the conveying pipe, and the channel is connected to the first inlet.

[0016] Preferably, a sensor for monitoring the adsorption force is provided in the conveying pipeline or at the negative pressure generating port, and the adsorption force generated by the negative pressure device is smaller than the minimum adsorption force value that destroys the structure of the oily sludge.

[0017] Preferably, a nozzle for cleaning or disinfecting the delivery pipeline is provided on the inner wall of the delivery pipeline, and the nozzle is connected to a storage device for storing liquid / gas for cleaning or disinfection through a first connecting pipeline, and a switch valve for opening and closing the connecting pipeline is provided on the first connecting pipeline.

[0018] Preferably, the supercritical CO2 extraction module comprises a drum, and at least two brackets for supporting the drum are provided on the support platform, and the brackets are rotatably connected to the drum, and a driving mechanism is provided at one of the brackets, and the driving mechanism is transmission-connected to the drum or a stirring structure provided in the drum; the drum has the first inlet, the second inlet and the first outlet;

[0019] The second inlet is connected to a CO2 supply source for storing liquid CO2 through a second connecting pipeline, and a heating module and a pressurizing module for converting the liquid CO2 into a supercritical state are provided on the second connecting pipeline.

[0020] Preferably, the extract separation and recovery module includes a separator for separating the mixture of sludge and supercritical CO2 from oil, a heat exchanger for converting supercritical CO2 into liquid CO2 and a filtering device for separating liquid CO2 from sludge, the separator having a third inlet for the mixture to be separated, the second outlet for the separated oil to be discharged and a fifth outlet for the separated mixture to be discharged, the fifth outlet being connected to the inlet of the heat exchanger, the filtering device having a fourth inlet for the mixture of sludge and liquid CO2 to enter, the third outlet for the separated sludge to be discharged and the fourth outlet for the separated CO2 to be discharged, the fourth inlet being connected to the outlet of the heat exchanger, the third outlet being connected to the sludge recovery device, and the fourth outlet being connected to the CO2 supply source.

[0021] Preferably, it also includes an oily sludge pretreatment module and a sludge post-treatment module;

[0022] The oily sludge pretreatment module comprises a crusher, a high-speed mixer, a centrifugal dehydrator and a regulating tank which are connected in sequence, the collecting part is connected to the inlet of the crusher, and the regulating tank is connected to the first inlet through a transport device;

[0023] The sludge post-processing module comprises a drying device and a curing device which are connected in sequence, and the drying device is in communication with the third outlet.

[0024] Compared with the prior art, the present invention has achieved the following technical effects:

[0025] 1. The present invention integrates the collection and transportation module, supercritical CO2 extraction module and extract separation and recovery module for collecting and treating oily sludge on a mobile module, so that the oily sludge treatment device can be directly driven to the pollution site, and the oily sludge is treated on the pollution site, which saves the transportation time of the sludge, shortens the treatment cycle, improves the emergency response capability, solves the problem of immediate treatment of oily sludge, reduces the risk of long-distance transportation of pollutants, and can meet the urgent needs for on-site emergency treatment and oil pollution control in remote areas; in addition, it can realize the integrated operation of collecting, extracting and recovering oily sludge, improves the treatment efficiency, and its flexible, environmentally friendly and efficient characteristics are of great significance for environmental protection, resource recovery and responding to sudden environmental pollution incidents, bringing innovative breakthroughs to the field of oily sludge treatment.

[0026] Other technical solutions of the present invention have achieved the following technical effects compared with the prior art:

[0027] 2. The present invention installs each module on the vehicle platform in a detachable manner, so that each module can work independently and collaboratively, which is convenient for rapid assembly, disassembly and maintenance; the configuration can also be quickly adjusted according to processing requirements to achieve customized services. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0029] Figure 1 This is a schematic diagram of the system structure of the oily sludge treatment device.

[0030] Among them, 1. Collection and transportation module; 2. Supercritical CO2 extraction module; 3. Extract separation and recovery module; 4. Support platform; 5. First inlet; 6. Second inlet; 7. First outlet; 8. Third inlet; 9. Second outlet; 10. Third outlet; 11. Fourth outlet; 12. Conveying part; 13. Drum; 14. CO2 supply source; 15. Heating module; 16. Pressurizing module; 17. Flow regulating equipment; 18. Separator; 19. Heat exchanger; 20. Filtering device; 21. Fifth outlet; 22. Fourth inlet; 23. Oily sludge pretreatment module; 24. Sludge post-treatment module; 25. Crusher; 26. High-speed mixer; 27. Centrifugal dehydrator; 28. Regulating tank; 29. ​​Drying equipment; 30. Solidification equipment; 31. Energy supply module. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0033] like Figure 1 As shown, the present invention provides an oily sludge treatment device, which can also be called an oily sludge treatment vehicle, comprising a mobile module, a collection and transportation module 1, a supercritical CO2 extraction module 2 and an extract separation and recovery module 3;

[0034] The mobile module includes a movable walking part and a support platform 4 connected to the walking part by transmission. The collection and transportation module 1, the supercritical CO2 extraction module 2 and the extract separation and recovery module 3 are installed on the support platform 4; wherein the walking part is a crawler walking mechanism or a wheel walking mechanism. In some embodiments, the walking part is a wheel walking mechanism, which has all-terrain adaptability, a high-performance and high-load-bearing off-road chassis, four-wheel drive, differential lock, etc., to ensure that the vehicle can adapt to various complex terrains, can travel stably under harsh road conditions, and quickly reach the work site, especially remote or difficult-to-reach areas. The vehicle body is equipped with multiple retractable support structures to ensure the stability of the vehicle during operation.

[0035] The collecting and transporting module 1 includes a collecting part for collecting sludge, the supercritical CO2 extraction module 2 has a first inlet 5 for oily sludge to enter, a second inlet 6 for supercritical CO2 to enter, and a first outlet 7 for discharging a mixture of oily sludge and supercritical CO2, and the first inlet 5 is connected to the collecting part; the extract separation and recovery module 3 has a third inlet 8 for oily sludge and a mixture of supercritical CO2 to enter, a second outlet 9 for discharging separated oil, a third outlet 10 for discharging separated sludge, and a fourth outlet 11 for discharging separated CO2, and the third inlet 8 is connected to the first outlet 7.

[0036] When in use, the oily sludge treatment device is driven to the pollution site, the collection part collects the contaminated oily sludge, and the collected oily sludge is transported to the first inlet 5 of the supercritical CO2 extraction module 2, the supercritical CO2 enters the supercritical CO2 extraction module 2 through the second inlet 6, the oily sludge and the supercritical CO2 are fully mixed and extracted in the supercritical CO2 extraction module 2, and the extracted mixture enters the extract separation and recovery module 3. After separation and recovery, the oil in the mixture is discharged through the second outlet 9, the separated sludge is discharged through the third outlet 10, and the separated CO2 is discharged through the fourth outlet 11, so as to achieve effective treatment of the oily sludge. Compared with the prior art method that requires the collected oily sludge to be transported to a treatment plant with a fixed site first, and then the oily sludge is subjected to a series of treatments, the oily sludge treatment device of the present application can treat the oily sludge at the pollution site, saving the transportation time of the oily sludge, shortening the treatment cycle, and improving the emergency response capability.

[0037] The collection and transportation module 1 also includes a conveying part 12 for conveying the materials in the collection part to the first entrance 5. The conveying part 12 is detachably connected to the support platform 4. The collection and transportation module 1 has two structural forms that can be realized. Form 1: the collection part is a bucket-shaped structure, the conveying part 12 is a mechanical arm, the bucket-shaped structure is installed at one end of the conveying part 12 away from the support platform 4 in a detachable connection manner, the conveying part 12 is a mechanical arm that can rotate around the xyz axis, and the mechanical arm is detachably connected to the support platform 4; wherein the bucket-shaped structure can be various types of buckets, such as buckets, breaker hammers or grippers. When using, the type of bucket can be selected according to needs to adapt to different operation requirements. The mechanical arm can be a robot mechanical arm that can rotate around the xyz axis in the prior art. And the mechanical arm includes a main arm and a secondary arm, the main arm and the secondary arm are connected by joints, and an independent telescopic mechanism is set at each joint, so that the mechanical arm can be flexibly bent like a human arm to achieve high-precision excavation and material grabbing. The telescopic mechanism is one of the structures such as a hydraulic telescopic mechanism and an electric push rod.

[0038] Form 2: The collection part is an adsorption device, which includes a conveying pipeline, a suction cup and a negative pressure device. The conveying pipeline is detachably connected to the support platform 4. The suction cup is arranged at one end of the conveying pipeline away from the support platform 4. The negative pressure device is fixed on the conveying pipeline or the support platform 4, and the negative pressure device is located on the side of the conveying pipeline away from the suction cup. The negative pressure generating port faces the conveying pipeline, and a channel for material flow is provided between the negative pressure generating port and the conveying pipeline, and the channel is connected to the first inlet 5. In this case, the conveying part 12 is a conveying pipeline. A sensor for monitoring the adsorption force is provided in the conveying pipeline or at the negative pressure generating port, and the adsorption force generated by the negative pressure device is less than the minimum adsorption force value that destroys the structure of the oily sludge.

[0039] In order to prevent the oily sludge remaining on the inner wall of the delivery pipeline from clogging the delivery pipeline, a nozzle for cleaning or disinfecting the delivery pipeline is provided on the inner wall of the delivery pipeline, and the nozzle is connected to a storage device for storing liquid / gas for cleaning or disinfection through a first connecting pipeline, and a switch valve for opening and closing the connecting pipeline is provided on the first connecting pipeline. When the sludge is transported, the switch valve is opened, and the cleaning liquid or cleaning gas is sprayed to the inner wall of the delivery pipeline through the nozzle in time to flush away the oily sludge remaining on the inner wall of the delivery pipeline, so as to prevent the oily sludge from agglomerating and adhering to the inner wall of the delivery pipeline. After the flushing is completed, the switch valve is closed.

[0040] When oil seeps into muddy ground or accumulated sludge forms hard solid sludge, the first type of collection and transportation module 1 is installed on the supporting platform 4. When thin, semi-solid oily sludge is accumulated or scattered on the solidified ground, the second type of collection and transportation module 1 is installed on the supporting platform 4. Different collection methods can be flexibly selected according to different situations to improve the collection and transportation efficiency of oily sludge.

[0041] The supercritical CO2 extraction module 2 includes a drum 13, and at least two brackets for supporting the drum 13 are provided on the supporting platform 4. The brackets are rotatably connected to the drum 13, and the two brackets are respectively located on both sides of the axial direction of the drum 13, one of the brackets is provided with a driving mechanism, and the driving mechanism is transmission-connected to the drum 13 or a stirring structure provided in the drum 13; the drum 13 has a first inlet 5, a second inlet 6 and a first outlet 7; the second inlet 6 is connected to a CO2 supply source 14 for storing liquid CO2 through a second connecting pipeline, and a heating module 15 and a pressurizing module 16 for converting the liquid CO2 into a supercritical state are provided on the second connecting pipeline.

[0042] When the driving mechanism is connected to the drum 13 by transmission, the drum 13 rotates to fully mix the oily sludge and supercritical CO2 therein. At this time, the structure of the drum 13 can refer to the rotating drum of a concrete transport mixer truck. The first inlet 5 and the second inlet 6 are combined into one. For the convenience of explanation, they are referred to as the inlet here. The inlet is opened at the end of the drum 13 and passes through the axis of the drum 13. A transport component, such as an auger conveyor, a belt conveyor, etc., is provided at the inlet. One end of the transport component extends into the inlet, and the other end extends to the discharge port of the collection and transportation module 1. If the collection and transportation module 1 is of the first form, the transport component extends into the rotation range of the bucket-shaped structure, so that the oily sludge in the bucket can fall onto the transport component; if the collection and transportation module 1 is of the second form, the transport component extends to the bottom of the channel, so that the oily sludge transported to the channel can fall onto the transport component, and the second connecting pipeline passes through the inlet and extends to the inside of the drum 13;

[0043] When the driving mechanism is connected to the stirring structure in the roller, the drum 13 is in a fixed state, so the first inlet 5 and the second inlet 6 can be set separately or combined into one. In a feasible embodiment, the first inlet 5 and the second inlet 6 are set separately, and the first inlet 5 is within the rotation range of the bucket-shaped structure or directly below the channel, and the second connecting pipeline passes through the second inlet 6 and extends to the interior of the drum 13.

[0044] Among them, the CO2 supply source 14 is a high-pressure steel cylinder or storage tank, and the high-pressure steel cylinder or storage tank stores liquid CO2. When in use, the liquid CO2 is heated to a supercritical temperature (usually above 31.1°C) by a heating module 15 to ensure that CO2 can be smoothly converted to a supercritical state. The heated CO2 is pressurized to a supercritical pressure (above 7.38MPa) by a pressurizing module 16 to ensure that it remains in a supercritical state and has a high solubility. In order to facilitate the control of the injection amount of supercritical CO2, a flow regulating device 17 and a valve for controlling the on-off of the second connecting pipeline are also provided on the second connecting pipeline, and the injection rate of supercritical CO2 is accurately adjusted by the flow regulating device 17. The interior of the drum 13 is equipped with special spiral protrusions and stirring blades to promote full contact and efficient extraction of oily sludge with supercritical CO2. After the extraction reaches a predetermined time or extraction efficiency (i.e., the liquid hydrocarbon content extracted per unit time decreases to a certain set value, or the cumulative liquid hydrocarbon content extracted tends to be stable), the injection of supercritical CO2 is stopped and the rotation of the drum 13 is slowly stopped to complete the extraction.

[0045] The extract separation and recovery module 3 includes a separator 18 for separating the mixture of sludge and supercritical CO2 from oil, a heat exchanger 19 for converting supercritical CO2 into liquid CO2, and a filtering device 20 for separating liquid CO2 from sludge. The separator 18 has a third inlet 8 for the mixture to be separated, a second outlet 9 for the separated oil to be discharged, and a fifth outlet 21 for the separated mixture to be discharged. The fifth outlet 21 is connected to the inlet of the heat exchanger 19. The filtering device 20 has a fourth inlet 22 for the mixture of sludge and liquid CO2 to enter, a third outlet 10 for the separated sludge to be discharged, and a fourth outlet 11 for the separated CO2 to be discharged. The fourth inlet 22 is connected to the outlet of the heat exchanger 19, the third outlet 10 is connected to the sludge recovery device, and the fourth outlet 11 is connected to the CO2 supply source 14. The separator 18 is a centrifuge. In an achievable embodiment, the separator 18 is a three-phase horizontal centrifuge. The oil in the oily sludge is separated by the centrifuge and discharged to the oil recovery tank through the second outlet 9. The remaining mixture is passed into the heat exchanger 19, and heat exchange is performed with the cooling medium in the heat exchanger 19, so that the supercritical CO2 is converted into liquid CO2, and then the mixture of liquid CO2 and sludge is passed into the filtering device 20. After filtering, the liquid CO2 is separated from the sludge, and the liquid CO2 flows back to the CO2 supply source 14 through the fourth outlet 11, and the sludge is discharged to the sludge recovery device through the third outlet 10. The heat exchanger 19 adopts the existing heat exchange equipment, and the filtering device 20 adopts the existing sludge dewatering centrifuge or sludge filter press.

[0046] The oily sludge treatment device provided by the present invention further includes an oily sludge pretreatment module 23 and a sludge post-treatment module 24;

[0047] The oily sludge pretreatment module 23 includes a crusher 25, a high-speed mixer 26, a centrifugal dewatering machine 27 and a regulating tank 28 connected in sequence, the collecting part is connected to the inlet of the crusher 25, and the regulating tank 28 is connected to the first inlet 5 through a transport device; wherein the inlet of the crusher 25 is within the rotation range of the bucket-shaped structure or directly below the passage, one end of the transport component is placed at the outlet of the regulating tank 28, and the other end extends to the first inlet 5. After passing through the crusher 25 and the high-speed mixer 26, the large pieces of oily sludge are broken into small pieces, the water mixed in the oily sludge is removed by the centrifugal dewatering machine 27, and then the dewatered sludge is passed into the regulating tank 28, and flocculants, filter aids and pH regulators are added to the regulating tank 28 to adjust the properties of the oily sludge, and the oily sludge is optimized to a state more suitable for supercritical CO2 extraction, so as to promote the separation of the oil phase and the solid phase and optimize the oil-water separation conditions.

[0048] The sludge post-processing module 24 includes a drying device 29 and a curing device 30 connected in sequence, wherein the drying device 29 is connected to the third outlet 10, wherein the drying device 29 is used to evaporate the residual water to reduce the volume of the sludge; a curing agent is introduced into the curing device 30 to convert the remaining water and organic matter into a stable form for easy handling and transportation. In some embodiments, the sludge can also be subjected to biodegradation treatment before drying to further decompose the organic matter and reduce harmful substances.

[0049] The oily sludge treatment device provided by the present invention further includes an energy supply module 31, which includes a diesel generator, a solar panel and an energy storage system, wherein:

[0050] Diesel generator: provides a stable power supply to ensure the normal operation of all equipment, and the diesel generator is installed at the rear of the vehicle;

[0051] Solar panels: installed on the top of the vehicle or on a deployable stand, they use the sun to generate electricity, supplement energy needs, and improve the sustainability of the system;

[0052] Energy storage system: Equipped with high-performance battery packs to store excess energy for emergency use, ensuring that the system can continue to operate at night or in rainy weather.

[0053] In order to adapt to the space limitation of the support platform 4, the equipment used in the present invention, such as the crusher 25, high-speed mixer 26, centrifugal dehydrator 27, drum 13, separator 18, heat exchanger 19, filter 20, drying equipment 29 and curing equipment 30, are scaled down in proportion while maintaining the original functions, and each equipment is fixed on the support platform 4 in a manner that is easy to disassemble, so as to facilitate on-site maintenance and replacement. In order to reduce the impact of vibration during driving on the separation effect and extraction effect, the centrifugal dehydrator 27, drum 13 and separator 18 are fixed on the support platform 4 through shock-absorbing supports. Figure 1 The dotted line in the figure is the sludge transportation path, the double-dotted line is the CO2 recovery path, and the dotted line is the oil recovery path.

[0054] It should be noted that it is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention, and any figure mark in the claims should not be regarded as limiting the claims involved.

Claims

1. An oily sludge treatment device, characterized in that: It includes a mobile module, a collection and transportation module, a supercritical CO2 extraction module and an extract separation and recovery module; The mobile module includes a movable walking part and a supporting platform connected to the walking part by transmission, and the collection and transportation module, the supercritical CO2 extraction module and the extract separation and recovery module are installed on the supporting platform; The collecting and transporting module comprises a collecting portion for collecting sludge, the supercritical CO2 extraction module comprises a first inlet for oily sludge to enter, a second inlet for supercritical CO2 to enter, and a first outlet for a mixture of oily sludge and supercritical CO2 to discharge, the first inlet is connected to the collecting portion; The collecting part is an adsorption device, which includes a conveying pipeline, a suction cup and a negative pressure device. The conveying pipeline is detachably connected to the support platform. The suction cup is arranged at one end of the conveying pipeline away from the support platform. The negative pressure generating port of the negative pressure device faces the conveying pipeline, and the fixedly arranged negative pressure device is located at a side of the conveying pipeline away from the suction cup. A channel for material flow is arranged between the negative pressure generating port and the conveying pipeline, and the channel is connected to the first inlet. The extract separation and recovery module includes a separator for separating the mixture of sludge and supercritical CO2 from oil, a heat exchanger for converting supercritical CO2 into liquid CO2, and a filtering device for separating liquid CO2 from sludge; The extract separation and recovery module has a third inlet for the mixture of oily sludge and supercritical CO2 to enter, a second outlet for the separated oil to be discharged, a third outlet for the separated sludge to be discharged, and a fourth outlet for the separated CO2 to be discharged, and the third inlet is connected to the first outlet; The supercritical CO2 extraction module comprises a drum, wherein the interior of the drum is provided with a spiral protrusion and a stirring blade, and at least two brackets for supporting the drum are provided on the support platform, wherein the brackets are rotatably connected to the drum, wherein a driving mechanism is provided at one of the brackets, and the driving mechanism is transmission-connected to the drum or a stirring structure provided in the drum; the drum has the first inlet, the second inlet and the first outlet; The second inlet is connected to a CO2 supply source for storing liquid CO2 through a second connecting pipeline, and a heating module and a pressurizing module for converting the liquid CO2 into a supercritical state are provided on the second connecting pipeline; It also includes an oily sludge pretreatment module, which includes a crusher, a high-speed mixer, a centrifugal dehydrator and a regulating tank connected in sequence, the collecting part is connected to the inlet of the crusher, and the regulating tank is connected to the first inlet through a transportation device.

2. The oily sludge treatment device according to claim 1, characterized in that: The collecting and transporting module further comprises a conveying portion for conveying the materials in the collecting portion to the first entrance, and the conveying portion is detachably connected to the supporting platform.

3. The oily sludge treatment device according to claim 1, characterized in that: A sensor for monitoring the adsorption force is provided in the conveying pipeline or at the negative pressure generating port, and the adsorption force generated by the negative pressure device is less than the minimum adsorption force value that destroys the structure of the oily sludge.

4. The oily sludge treatment device according to claim 3, characterized in that: A nozzle for cleaning or disinfecting the delivery pipeline is provided on the inner wall of the delivery pipeline. The nozzle is connected to a storage device for storing liquid / gas for cleaning or disinfection through a first connecting pipeline. A switch valve for opening and closing the connecting pipeline is provided on the first connecting pipeline.

5. The oily sludge treatment device according to claim 4, characterized in that: The separator has a third inlet for the mixture to be separated, the second outlet for the separated oil to be discharged, and the fifth outlet for the separated mixture to be discharged, and the fifth outlet is connected to the inlet of the heat exchanger. The filtering device has a fourth inlet for the mixture of sludge and liquid CO2 to enter, the third outlet for the separated sludge to be discharged, and the fourth outlet for the separated CO2 to be discharged, the fourth inlet is connected to the outlet of the heat exchanger, the third outlet is connected to the sludge recovery device, and the fourth outlet is connected to the CO2 supply source.

6. The oily sludge treatment device according to claim 5, characterized in that: It also includes a sludge post-treatment module; The sludge post-processing module comprises a drying device and a curing device which are connected in sequence, and the drying device is in communication with the third outlet.

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