An integrated thermal desorption machine for oil-containing solid waste, its application, system and drying method

Abstract

The present invention discloses an integrated thermal desorption machine for oil-containing solid waste, an application, a system and a drying method. The integrated machine includes: a drying and dehydration device and a thermal desorption and oil removal device; the material outlet of the drying and dehydration device is connected to the material inlet of the thermal desorption and oil removal device through a retractable pipe; the drying and dehydration device includes: a first shell, the first shell includes a jacket chamber and a first drying chamber; a double-axis hollow stirring part is arranged in the first drying chamber; the jacket chamber is provided with a first heat carrier inlet and a first heat carrier outlet; the thermal desorption and oil removal device includes: a second shell, a second drying chamber and a heating device are arranged in the second shell, and a double-screw pusher is arranged in the second drying chamber. The integrated machine avoids the occurrence of "blocking" phenomenon, realizes material granulation and dispersion, improves heat transfer efficiency and the adaptability of the device to different material properties. The "ladder" energy supply method is adopted to realize material drying and dehydration and thermal desorption and oil removal energy supply respectively, reducing the energy consumption of harmless material treatment.

Description

Technical Field

[0001] The present invention relates to the technical field of oil-containing solid waste treatment in the petrochemical industry, and in particular to an oil-containing solid waste thermal desorption integrated machine, application, system and drying method. Background Art

[0002] A large amount of oily sludge, oil-based drill cuttings and petroleum-contaminated soil (hereinafter referred to as oily solid waste) will be generated during the oil and gas exploration and development process. Since oily solid waste contains petroleum hydrocarbons, it has been listed in the category of national hazardous waste. If it is not treated safely and effectively, it will inevitably cause pollution to the environment.

[0003] Oily solid waste has the characteristics of high water content and great difficulty in treatment. The conventional process is to add polyacrylamide for chemical conditioning and then centrifugal dehydration. After dehydration, the sludge has a water content of about 80%, and the dehydration range of oily sludge is very limited. Thermal desorption technology is often used for oily sludge dehydration. This technology has the advantages of thorough treatment, strong material adaptability, high resource recycling rate, and less secondary pollution, and has become a technical hotspot for the treatment of oil-based drilling cuttings and petroleum-contaminated soil. Summary of the invention

[0004] The inventors found that in the thermal desorption process, due to the mixing of a large amount of organic agents, oil-water separation is difficult, and the thermal desorption process has poor adaptability to high-water-content and high-viscosity materials; secondly, oil-containing solid waste is easy to adhere to the dryer, such as the rotating shaft, which makes feeding difficult and causes serious coking on the inner wall of the dryer; thirdly, the existing treatment process has high fuel consumption and treatment costs; although the existing drying-pyrolysis combined process adopts a combination of a dryer and a pyrolysis furnace, the connecting section between the two often has problems of jamming and blockage, the system operation stability is poor, and the odor is difficult to control, and the on-site operating environment is harsh.

[0005] In view of the above problems, the present invention is proposed to provide an oil-containing solid waste thermal desorption integrated machine, application, system and drying method that overcome the above problems or at least partially solve the above problems.

[0006] In a first aspect, an embodiment of the present invention provides an integrated thermal desorption machine for oil-containing solid waste, which may include: a drying and dehydration device and a thermal desorption and oil removal device; the material outlet of the drying and dehydration device is connected to the material inlet of the thermal desorption and oil removal device through a retractable pipeline;

[0007] The drying and dehydration device comprises: a first shell, a jacket chamber and a first drying chamber; a double-shaft hollow stirring part is arranged in the first drying chamber; the jacket chamber is provided with a first heat carrier inlet and a first heat carrier outlet;

[0008] The thermal desorption oil removal device comprises: a second shell, a second drying chamber and a heating device are arranged in the second shell, and a double-helix driving part is arranged in the second drying chamber.

[0009] Optionally, the all-in-one machine also includes: an adjusting baffle; the adjusting baffle is arranged at the material outlet of the drying and dehydration device; or, the adjusting baffle is arranged at the material inlet of the thermal desorption and oil removal device; or, the adjusting baffle is arranged in a retractable pipe between the material outlet of the drying and dehydration device and the material inlet of the thermal desorption and oil removal device.

[0010] Optionally, the heating device is an electromagnetic heater and / or a burner.

[0011] Optionally, a first shielding gas inlet is provided on the first shell, and the first shielding gas inlet is communicated with the first drying chamber; a second shielding gas inlet is provided on the second shell, and the second shielding gas inlet is communicated with the second drying chamber.

[0012] Optionally, the double-shaft hollow stirring part is further provided with a second heat carrier inlet and a second heat carrier outlet;

[0013] The first heat carrier inlet and the second heat carrier inlet are used to connect to an external heat carrier, or are communicated with the chamber where the heating device is located.

[0014] In a second aspect, an embodiment of the present invention provides an application of the integrated thermal desorption machine for oil-containing solid waste as described in the first aspect in an oil-containing solid waste drying system.

[0015] In a third aspect, an embodiment of the present invention provides an oil-containing solid waste drying system, which may include: a material bin, a slag bin, a dust removal device, a condensation device, and an oil-containing solid waste thermal desorption integrated machine as described in the first aspect;

[0016] The material bin is in communication with the material inlet of the drying and dehydration device;

[0017] The slag bin is in communication with the material outlet of the thermal desorption oil removal device;

[0018] The condensing device is communicated with the first drying chamber and the second drying chamber respectively through the dust removal device.

[0019] Optionally, the slag bin is connected to a material inlet of the drying and dehydration device.

[0020] Optionally, the dust removal equipment may include: a first dust collector group and a second dust collector group;

[0021] The condensing equipment may include: a chiller, a first circulating pump, a first condensing tower, a first condensate storage tank connected to the first condensing tower, a second condensing tower, a second condensate storage tank connected to the second condensing tower, a third condensing tower, and a third condensate storage tank connected to the third condensing tower;

[0022] The chiller is sequentially connected with the first circulation pump and the condensation pipelines of the third condensation tower, the second condensation tower, and the first condensation tower to form a passage;

[0023] The first drying chamber is connected to the second condensation tower via a first evaporation gas outlet and the first dust collector group; the second drying chamber is connected to the first condensation tower via a second evaporation gas outlet and the second dust collector group.

[0024] Optionally, the system may further include a second circulation pump, a spray device is provided in the first condensation tower, and the second circulation pump is respectively connected to the bottom of the first condensation tower and the spray device.

[0025] Optionally, the system may further include: a first induced draft fan connected to an exhaust port of the third condensation tower.

[0026] Optionally, the exhaust port of the third condensation tower is connected to the burner in the thermal desorption oil removal device through the first induced draft fan.

[0027] Optionally, the system may further include: air preheating equipment; the air preheating equipment includes: an air preheater, and a blower and a second induced draft fan respectively connected to the air preheater;

[0028] One end of the air preheater is connected to the first heat carrier outlet and the second heat carrier outlet respectively, and the other end is connected to the burner in the thermal desorption oil removal device.

[0029] Optionally, the system may further include: a protective gas supply device; the protective gas supply device is connected to the first drying chamber and the second drying chamber respectively through a first protective gas inlet arranged on the drying and dehydration device and a second protective gas inlet arranged on the thermal desorption and oil removal device.

[0030] In a fourth aspect, an embodiment of the present invention provides a method for drying oil-containing solid waste, which may include:

[0031] The oily solid waste and the residue are mixed in a drying and dehydration device in the oily solid waste thermal desorption integrated machine to obtain a mixture;

[0032] The mixture is heated and pre-treated in the drying and dehydration device, and after dehydration, the mixture is discharged into the thermal desorption and oil removal device in the oil-containing solid waste thermal desorption integrated machine for thermal desorption and oil removal, and the treated residue is discharged into the slag bin;

[0033] The evaporated gas evaporated in the drying and dehydration device and the evaporated gas evaporated in the thermal desorption and oil removal device are discharged into the condensation device for condensation treatment after being dedusted by the dedusting equipment.

[0034] Optionally, the heat source of the drying and dehydration device is supplied by an external heat source, and the heat source of the thermal desorption and oil removal device is supplied by a built-in electromagnetic heater of the thermal desorption and oil removal device;

[0035] or,

[0036] The heat source of the thermal desorption oil removal device is supplied by a burner built into the thermal desorption oil removal device, and the drying and dehydration device uses the flue gas generated by the burner as a heat source.

[0037] Optionally, the fuel gas source of the burner is: uncondensed gas after being processed by the condensing device;

[0038] and / or, gas discharged through the first heat carrier outlet and the second heat carrier outlet of the drying and dehydration device and treated by an air preheater; and / or, external fuel gas.

[0039] The beneficial effects of the above technical solution provided by the embodiment of the present invention include at least:

[0040] The embodiment of the present invention provides an integrated thermal desorption machine, application, system and drying method for oil-containing solid waste. The integrated machine may include: a drying and dehydration device and a thermal desorption and oil removal device; the material outlet of the drying and dehydration device is connected to the material inlet of the thermal desorption and oil removal device through a retractable pipe; the drying and dehydration device includes: a first shell, the first shell includes a jacket chamber and a first drying chamber; a double-axis hollow stirring part is arranged in the first drying chamber; the jacket chamber is provided with a first heat carrier inlet and a first heat carrier outlet; the thermal desorption and oil removal device includes: a second shell, a second drying chamber and a heating device are arranged in the second shell, and a double-screw driving part is arranged in the second drying chamber.

[0041] In the embodiment of the present invention, the oil-containing solid waste material is mixed and stirred with the conditioning agent, which, on the one hand, reduces the viscosity of the material and prevents the material from being "stuck" during the conveyor processing; on the other hand, controls the oil content and water content of the material entering the integrated treatment device for thermal desorption of oil-containing solid waste, realizes material granulation and dispersion, and improves the heat transfer efficiency and the adaptability of the device to different material properties. The use of an integrated thermal desorption machine for oil-containing solid waste avoids the disadvantages that the viscosity of the oil-containing material after dehydration and drying is still high, and when a separate drying and thermal desorption device is used for treatment, the pipeline in and out of the device is easily blocked, affecting the stability of the device, and achieving the goal of long-term continuous operation of the system. The "ladder" energy supply method is used to realize the energy supply for material drying and dehydration and thermal desorption and oil removal, respectively, reducing the energy consumption of harmless material treatment.

[0042] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the written description and the accompanying drawings.

[0043] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0045] Figure 1 This is one of the structural schematic diagrams of the oil-containing solid waste thermal desorption integrated machine provided in an embodiment of the present invention;

[0046] Figure 2 This is a second structural schematic diagram of the oil-containing solid waste thermal desorption integrated machine provided in an embodiment of the present invention;

[0047] Figure 3 A schematic diagram of the distribution of heating devices in a thermal desorption oil removal device provided in an embodiment of the present invention;

[0048] Figure 4 It is one of the oil-containing solid waste drying systems provided in the embodiments of the present invention;

[0049] Figure 5 The second oil-containing solid waste drying system provided in the embodiment of the present invention;

[0050] Figure 6 The third oil-containing solid waste drying system provided in the embodiment of the present invention;

[0051] Figure 7 A schematic diagram of a process for drying oil-containing solid waste provided in an embodiment of the present invention;

[0052] in,

[0053] 1 is an integrated thermal desorption machine for oil-containing solid waste; 2 is a material bin; 3 is a slag bin; 4 is a dust removal device; 5 is a condensation device; 6 is a material feeder; 7 is a residue feeder; 8 is a preheating device; 9 is a protective gas supply device; 10 is an external fuel gas;

[0054] 11 is a drying and dehydration device; 12 is a thermal desorption and oil removal device; 13 is a retractable pipeline; 14 is an adjustable baffle; 15 is a flue gas pipeline; 41 is a first dust collector group; 42 is a second dust collector group; 51 is a chiller; 52 is a first circulation pump; 53 is a first condensation tower; 54 is a first condensate storage tank; 55 is a second condensation tower; 56 is a second condensate storage tank; 57 is a third condensation tower; 58 is a third condensate storage tank; 59 is a first induced draft fan; 81 is an air preheater; 82 is a blower; 83 is a second induced draft fan; 84 is a chimney;

[0055] 111 is the first shell; 112 is the jacket chamber; 113 is the first drying chamber; 114 is the double-shaft hollow stirring part; 121 is the second shell; 122 is the second drying chamber; 123 is the double-screw driving part; 124 is the heating device; 531 is the spraying device; 532 is the second circulation pump;

[0056] 1111 is the first protective gas inlet; 1121 is the first heat carrier inlet; 1122 is the first heat carrier outlet; 1131 is the first material inlet; 1132 is the first material outlet; 1133 is the first steam outlet; 1141 is the second heat carrier inlet; 1142 is the second heat carrier outlet; 1211 is the second protective gas inlet; 1221 is the second material inlet; 1222 is the second material outlet; 1223 is the second steam outlet. DETAILED DESCRIPTION

[0057] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0058] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", "far", "near", "front", "back" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0059] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0060] In an embodiment of the present invention, an integrated thermal desorption machine 1 for oil-containing solid waste is provided, which is used to dry the oil-containing solid waste, separate the oil phase substance of the oil-containing solid waste from the material, and realize the harmless treatment of the material. Figure 1 and Figure 2 As shown, the all-in-one machine 1 may include: a drying and dehydration device 11 and a thermal desorption and oil removal device 12; the material outlet of the drying and dehydration device 11 is connected to the material inlet of the thermal desorption and oil removal device 12 through a retractable pipe 13; the drying and dehydration device 11 includes: a first shell 111, a jacket chamber 112 and a first drying chamber 113; a double-axis hollow stirring portion 114 is arranged in the first drying chamber 113; the jacket chamber 112 is provided with a first heat carrier inlet 1121 and a first heat carrier outlet 1122; the thermal desorption and oil removal device 12 includes: a second shell 121, a second drying chamber 122 and a heating device 124 are arranged in the second shell 121, and a double-screw pushing portion 123 is arranged in the second drying chamber 122.

[0061] The above-mentioned drying and dehydration device and thermal desorption and oil removal device in the embodiment of the present invention are both essentially drying machines, wherein the drying and dehydration device is a device that can perform drying and dehydration independently, and its main task is to perform preliminary treatment (pretreatment) on the oil-containing solid waste. The preliminary treatment process mainly includes adding the oil-containing solid waste and the conditioning agent to stir and mix, or stirring and mixing the oil-containing solid waste with the residue that has been dried, the purpose of which is to reduce the viscosity of the oil-containing solid waste and prevent the oil-containing solid waste from adhering to the rotating shaft or the conveying device of the drying machine, thereby effectively preventing the occurrence of "jamming" during the transmission process; at the same time, the drying and dehydration device performs preliminary heating on the oil-containing solid waste, and the heating temperature is generally low, and the light oil and water in the oil-containing solid waste will be separated during heating. The preliminary heating process also heats the oil-containing solid waste to avoid serious heat loss when the thermal desorption and oil removal device is strongly heated.

[0062] The design concept of the above-mentioned integrated machine in the embodiment of the present invention is to heat the oil-containing solid waste in stages, and separate the heavy oil, light oil, water and combustible gas contained therein, and when heating in stages, the oil-containing solid waste is first heated at low temperature to a certain temperature, and then heated at high temperature, so as to avoid the waste of resources caused by the large energy loss in heat exchange when directly heating at high temperature. Moreover, the waste heat generated after high-temperature heating can be used as a heat source for low-temperature heating, further saving resources. That is, the inventor controls the heat supply and temperature of the drying and dehydration section and the thermal desorption section based on the properties of the material, realizes the "ladder" utilization of energy, and reduces the operating costs of the process and the device.

[0063] It should also be noted that the above-mentioned drying and dehydration device and the thermal desorption and oil removal device in the embodiment of the present invention are respectively used as separate drying treatment equipment, and refer to Figure 1 As shown, the structure of the drying and dehydration device must include a first material inlet 1131, a first material outlet 1132, a first evaporation gas outlet 1133 and a first liquid discharge port (not shown in the figure). Since the above-mentioned drying and dehydration device in the embodiment of the present invention adopts a double-axis hollow stirring part, the hollow structure can also be used as a heating part for hot steam heating, and a partition or sleeve structure is set on the central axis to divide the above-mentioned hollow structure into a second heat carrier inlet 1141 and a second heat carrier outlet 1142. The above-mentioned thermal desorption and oil removal device is also used as a separate drying treatment equipment, which must also include a second material inlet 1221, a second material outlet 1222, a second evaporation gas outlet 1223 and a second liquid discharge port (not shown in the figure). Those skilled in the art can understand that the above-mentioned retractable pipe 13 is respectively connected to the first material outlet 1312 and the second material inlet 1221; similarly, those skilled in the art can understand that the above-mentioned first evaporated gas outlet is connected to the first drying chamber, and the above-mentioned second evaporated gas outlet is connected to the second drying chamber, both of which are exhaust channels for the gas evaporated from the oily sludge.

[0064] It should also be noted that, referring to Figure 1 There may be multiple first material inlets 1131, one for the oily solid waste and another for the residue or the conditioning agent. The embodiment of the present invention does not specifically limit this. It should also be noted that the above-mentioned retractable pipe in this embodiment can effectively avoid deformation caused by thermal collision of the oily solid waste, so that the oily solid waste can smoothly enter the thermal desorption oil removal device.

[0065] In the embodiment of the present invention, the method of "tempering and reducing viscosity" is adopted to mix and stir the oil-containing solid waste material with the tempering agent. On the one hand, the viscosity of the material is reduced to prevent the material from being "stuck" during the conveyor processing process; on the other hand, the oil content and water content of the material entering the integrated thermal desorption treatment device for oil-containing solid waste are controlled to achieve material granulation and dispersion, improve the heat transfer efficiency and the adaptability of the device to different material properties. The use of an integrated thermal desorption machine for oil-containing solid waste avoids the high viscosity of the oil-containing material after dehydration and drying. When a separate drying and thermal desorption device is used for treatment, the disadvantages of easy clogging of the pipeline in and out of the device and affecting the stability of the device are solved, and the goal of long-term continuous operation of the system is achieved. The "ladder" energy supply method is used to realize the energy supply for material drying and dehydration and thermal desorption and oil removal, respectively, reducing the energy consumption of harmless material treatment.

[0066] In another alternative embodiment, referring to Figure 1 and Figure 2 As shown, the integrated machine may further include: an adjusting baffle 14; the adjusting baffle in this embodiment is used to control the amount of material entering the thermal desorption and oil removal device from the drying and dehydration device, and the baffle in this embodiment may be set at multiple positions, for example, the adjusting baffle is set at the material outlet of the drying and dehydration device; or, the adjusting baffle is set at the material inlet of the thermal desorption and oil removal device; or, the adjusting baffle is set in a retractable pipe between the material outlet of the drying and dehydration device and the material inlet of the thermal desorption and oil removal device. In the embodiment of the present invention, the specific position of the baffle is not limited.

[0067] In another alternative embodiment, referring to Figure 1 and Figure 2 As shown, the heating device 124 in the thermal desorption oil removal device is an electromagnetic heater and / or a burner. Figure 1 When there is no heat source carrier, it can be an electromagnetic heater. Figure 2 When there is a heat source carrier, it can be a burner.

[0068] Reference Figure 3 As shown, the heating device 124 can be evenly distributed under the double-screw pusher 123, so as to evenly heat the oil-containing solid waste dried in the double-screw pusher. The burners in the thermal desorption oil removal device in the embodiment of the present invention are evenly arranged on both sides of the furnace body, and each burner heats its corresponding area. During the thermal desorption process of the material, the heating power of the burner can be accurately adjusted according to the heat absorption of the material to achieve the function of precise temperature control during the thermal desorption process.

[0069] In another optional embodiment, in order to prevent the leakage of evaporated gas during the drying process of the oil-containing solid waste, it is first necessary to fill the drying equipment with protective gas (such as nitrogen, water vapor, etc.), so refer to Figure 1 and Figure 2 As shown, the first shell 111 is provided with a first protective gas inlet 1111 , which is communicated with the first drying chamber 113 ; the second shell 121 is provided with a second protective gas inlet 1211 , which is communicated with the second drying chamber 122 .

[0070] In another optional embodiment, in order to fully heat the oil-containing solid waste in the drying and dehydration device, refer to Figure 1 and Figure 2 As shown, the double-shaft hollow stirring portion 114 is further provided with a second heat carrier inlet 1141 and a second heat carrier outlet 1142 ; the first heat carrier inlet 1121 and the second heat carrier inlet 1141 are used for externally connecting the heat carrier, or communicating with the second drying chamber 122 .

[0071] It should be noted that the above-mentioned double-shaft hollow stirring part in the embodiment of the present invention can have one end as the heat carrier inlet and the other end as the heat carrier outlet, for example, the material outlet side is the heat carrier inlet, and the material inlet side is the heat carrier outlet, so as to facilitate sufficient heat exchange. Of course, the above-mentioned hollow part can also be separated by a partition or a sleeve structure, and the end at one end is sealed and blocked to form a U-shaped heat carrier passage. The specific structure of the above-mentioned heat carrier inlet and outlet is not limited in the embodiment of the present invention.

[0072] It should also be noted that the heat carrier in the embodiment of the present invention may be hot steam, heat transfer oil, high-temperature flue gas, etc. The hot steam and heat transfer oil may be provided by an oil refinery, and the high-temperature flue gas may be flue gas generated by combustion in a burner. The embodiment of the present invention does not limit the source and specific form of the heat carrier. It should also be noted that the heating device in the thermal desorption oil removal device in the embodiment of the present invention is not located in the second chamber. It can be understood by those skilled in the art that the heating device and the heat carrier are not in direct contact with the material, but evaporate the evaporated gas in the oil-containing solid waste by indirect heating. Therefore, the heating device may have a separate chamber in the shell, such as a separate jacket chamber, which will not be described in detail in the embodiment of the present invention.

[0073] Based on the same inventive concept, an embodiment of the present invention also provides an application of the above-mentioned oil-containing solid waste thermal desorption integrated machine in an oil-containing solid waste drying system.

[0074] Based on the same inventive concept, an oil-containing solid waste drying system is also provided in the embodiment of the present invention. Figures 4 to 6 Said system may include: a material bin 2, a slag bin 3, a dust removal device 4, a condensation device 5 and the above-mentioned oil-containing solid waste thermal desorption integrated machine 1;

[0075] The material bin 2 is connected to the material inlet of the drying and dehydration device 11;

[0076] The slag bin 3 is connected to the material outlet of the thermal desorption oil removal device 12;

[0077] The condensing device 5 is communicated with the first drying chamber 113 and the second drying chamber 122 respectively through the dust removal device 4 .

[0078] It should be noted that, combined with Figure 1 and Figure 2 As shown, the dust removal equipment in the embodiment of the present invention is connected to the first drying chamber 113 and the second drying chamber 122 through the first evaporation gas outlet 1133 and the second evaporation gas outlet 1223 respectively. The gas evaporated from the oil-containing solid waste is subjected to dust removal treatment by the dust removal equipment 4 and then discharged into the condensation equipment 5 to condense the evaporation gas for easy discharge or subsequent treatment.

[0079] It should also be noted that, referring to Figure 3 As shown, in the embodiment of the present invention, the oil-containing solid waste in the material bin 2 is transferred to the material inlet of the drying and dehydration device 11 by the material feeder 6. The material feeder in the embodiment of the present invention can be a structure in which a motor drives a conveyor belt, or can be other structures, which is not specifically limited in the embodiment of the present invention.

[0080] In the above-mentioned system provided in the embodiment of the present invention, the oil-containing solid waste is subjected to a step-by-step heating treatment in the oil-containing solid waste thermal desorption integrated machine, so that energy is utilized in a step-by-step manner, achieving the purpose of harmless treatment of the oil-containing solid waste and efficient utilization of energy, and improving the economy of thermal desorption treatment of the oil-containing solid waste.

[0081] In another optional embodiment, the inventors found that even after the oily solid waste was mixed with the conditioning agent, its viscosity was still very high and it was very easy to adhere to the shaft or inner wall of the dryer. The inventors further conditioned the above oily solid waste. Figures 4 to 6 As shown, the slag bin 3 is connected to the material inlet of the drying and dehydration device 11. In the embodiment of the present invention, the solid waste residue in the slag bin 3 is transmitted to the material inlet of the drying and dehydration device 11 by the residue feeder 7. The residue feeder in the embodiment of the present invention can be a structure in which a motor drives a conveyor belt, or can be other structures, which is not specifically limited in the embodiment of the present invention.

[0082] In the embodiment of the present invention, the oil-containing solid waste and the solid waste residue are mixed and tempered in the drying and dehydration device to reduce the viscosity of the oil-containing solid waste, thereby preventing it from being adsorbed on the rotating shaft and the inner wall, preventing the occurrence of blocking, and further improving the continuity of the system operation. Thus, the viscosity reduction, dehydration and oil control functions of water content and oil content are achieved, and the treatment effect and adaptability of the device are improved.

[0083] In another optional embodiment, also refer to Figures 4 to 6As shown, the dust removal equipment 4 may include: a first dust collector group 41 and a second dust collector group 42; the condensing equipment 5 may include: a chiller 51, a first circulating pump 52, a first condensing tower 53, a first condensate storage tank 54 connected to the first condensing tower 53, a second condensing tower 55, a second condensate storage tank 56 connected to the second condensing tower 55, a third condensing tower 57 and a third condensate storage tank 58 connected to the third condensing tower 57;

[0084] The chiller 51 is connected to the first circulation pump 52 and the condensation pipes of the third condensation tower 57, the second condensation tower 55 and the first condensation tower 53 in sequence to form a passage; the first drying chamber 113 is connected to the second condensation tower 55 through the first evaporation gas outlet 1133 and the first dust collector group 41; the second drying chamber 122 is connected to the first condensation tower 53 through the second evaporation gas outlet 1223 and the second dust collector group 42.

[0085] It can be understood by those skilled in the art that the gas evaporated from the first drying chamber and the second drying chamber is discharged into the condensation chamber of the condensation tower for condensation treatment, and the condensate in the condensation pipeline is continuously circulated to achieve the condensation treatment of the above-mentioned evaporated gas. The cold source required for the condensation process in the embodiment of the present invention is provided by circulating cooling water. After the circulating cooling water is cooled in the chiller 51, it is transported by the first circulating pump 52, and passes through the cooling coils at the bottom of the third condensation tower 57, the second condensation tower 55 and the first condensation tower 53 in sequence, and then returns to the chiller 51. The circulating cooling water does not contact the cooled medium, ensuring that the circulating cooling water quality will not be polluted, reducing the frequency of replacing cooling water in the chiller, and reducing operating costs.

[0086] In the embodiment of the present invention, since the inventor adopts a "stepped" energy supply in the integrated thermal desorption machine for oil-containing solid waste, the energy provided by the drying and dehydration device and the thermal desorption and oil removal device is different, resulting in different temperatures of the vapor evaporated from the oil-containing solid waste. For example, the temperature of the vapor evaporated from the drying and dehydration device is 120°C to 140°C, and the components contained therein are dust, light oil, water vapor, etc.; while the temperature of the vapor evaporated from the thermal desorption and oil removal device is 350°C to 450°C, and the components contained therein are dust, heavy oil, light oil, water vapor, etc. In the drying process, the density of heavy oil is 900 to 1000 kg / m 3 The density of light oil is 825~845kg / m 3 The inventors have achieved the purpose of "graded" recovery and purification of resources by using different condensation equipment to carry out "graded condensation" recovery of the above-mentioned heavy oil, light oil and water vapor, and achieved the purpose of harmless treatment of oil-containing solid waste, efficient utilization of energy and "graded" recovery of resources, thereby improving the economic efficiency of thermal desorption treatment of oil-containing solid waste.

[0087] In a specific embodiment, referring to Figures 4 to 6 As shown, in order to enable the first condensation tower 53 to condense the evaporated gas evaporated from the second drying chamber of the thermal desorption oil removal device 12, especially to condense the heavy oil contained therein, the first condensation tower in this embodiment adopts a condensation spray tower, that is, a spray device 531 is provided in the first condensation tower, and the system also includes a second circulation pump 532, and the second circulation pump 532 is respectively connected to the bottom of the first condensation tower 53 and the spray device 531.

[0088] It should be noted that the above-mentioned condensation jacket in the embodiment of the present invention adopts direct condensation + indirect condensation to condense the evaporated gas, and condenses the heavy oil in the evaporated gas. For example, the condensation process in the condensation spray tower adopts a direct contact heat transfer method, and the spray medium adopts alkaline water. The alkaline water is transported to the spray pipe through a circulation pump, and sprayed into the condensation tower through a nozzle. In the condensation tower, it directly contacts and exchanges heat with the gas generated during the heating process. The gas (350-450°C) entering the condensation spray tower directly contacts and exchanges heat with the alkaline water in the condensation spray tower, so that the temperature of the gas is reduced to 300°C. The heavy oil component in the gas is converted into liquid and separated from the gas. The heavy oil condensed during the spraying process (density 900-1000kg / m 3 ) and alkaline water (density 1200kg / m 3 ) fall into the bottom of the condensation spray tower and are separated at the bottom of the tower. The separated alkaline water is cooled by the cooling coil at the bottom of the tower and then transported to the spray pipe by the second circulation pump for spraying. The separated heavy oil accumulates for a period of time and flows into the first condensate storage tank from the oil overflow port for storage.

[0089] The first condenser in the embodiment of the present invention uses media such as oil, water and alkaline water to improve the absorption efficiency of oil and gas in the desorbed gas and the elution efficiency of pollutants.

[0090] It should also be noted that the bottom of the above-mentioned condensation tower in the embodiment of the present invention can be provided with a partition structure, the partition can be distributed along the circumference of the tower, and a through hole (oil overflow port) connected to the first condensate storage tank is provided at the center of the partition. Of course, the above-mentioned first condensation tower in the embodiment of the present invention is not limited to the above-mentioned structure, as long as the alkaline water and heavy oil can be separated, and the heavy oil can be discharged into the first condensate storage tank for storage, the alkaline water can be recycled.

[0091] The above-mentioned condensation equipment in the embodiment of the present invention uses the "graded condensation" method to treat the gas generated during the drying pretreatment and thermal desorption treatment process. By controlling the flow rate of circulating cooling water, the substances with different condensation temperatures in the gas are condensed in different condensers. The "graded condensation" treatment process is as follows: the gas generated during the thermal desorption treatment process of the thermal desorption oil removal device passes through the second dust collector group 42 to remove solid particles and then passes through the first condensation tower 53, the second condensation tower 55, and the third condensation tower 57 in sequence for condensation treatment, and the heavy oil component is condensed in the first condensation tower 53, the light oil component is condensed in the second condensation tower 55, and the water phase substance is condensed in the third condensation tower 57. The condensed condensate is stored in the first condensate storage tank 54, the second condensate storage tank 56, and the third condensate storage tank 58, respectively, so that different components such as heavy oil, light oil, and water are stored in different condensation towers, realizing "graded" resource recovery. The gas generated during the drying pretreatment process of the drying and dehydration device enters the second condensation tower 55 and the third condensation tower 57 through the first dust collector group 41, and completes the condensation treatment in the condensation tower. It should be noted that the second condensation tower 55 and the third condensation tower 57 in the embodiment of the present invention use indirect heat exchange to condense the gas.

[0092] Furthermore, during the condensation process of the first condensation tower in the embodiment of the present invention, malodorous gases such as mercaptans in the evaporated gas will also be purified by the spraying of alkaline water, and then through the above-mentioned purification treatment, the gas discharged into the environment has less odor, thereby protecting the environment.

[0093] In another alternative embodiment, referring to Figures 4 to 6 As shown, the condensing device 5 in the system may further include: a first induced draft fan 59 , and the first induced draft fan 59 is connected to the exhaust port of the third condensing tower 57 .

[0094] The first induced draft fan in the embodiment of the present invention can directly discharge the gas condensed by the third condensation tower into the non-condensable gas collection device, or refer to Figure 6 As shown, the exhaust port of the third condensation tower 57 is connected to the burner 124 in the thermal desorption oil removal device 12 through the first induced draft fan 59. The above-mentioned condensation equipment in the embodiment of the present invention recovers the non-condensable gas obtained after "graded condensation" and transports the non-condensable gas to the non-condensable gas treatment device for treatment through the first induced draft fan.

[0095] The gas discharged from the third condensation tower in the embodiment of the present invention may also contain combustible components. Therefore, the gas can be used as a heat source for the thermal desorption oil removal device, which makes rational use of existing resources and protects the environment.

[0096] In another alternative embodiment, referring to Figure 6As shown, the system may also include: an air preheating device 8, which may include: an air preheater 81, and a blower 82 and a second induced draft fan 83 respectively connected to the air preheater 81; one end of the air preheater 81 is respectively connected to the first heat carrier outlet 1121 and the second heat carrier outlet 1142, and the other end is connected to the burner 124 in the thermal desorption oil removal device 12.

[0097] In an embodiment of the present invention, when a heat carrier such as steam cannot be provided, the flame and high-temperature flue gas generated by the combustion of external combustion gas and non-condensable gas transfer heat to the oil-containing solid waste by means of radiation heat transfer for thermal desorption treatment, and the high-temperature flue gas enters the drying and dehydration device through the flue. In the drying and dehydration device, the high-temperature flue gas transfers heat to the oil-containing solid waste by means of convection heat transfer for drying pretreatment. The flue gas after pretreatment enters the air preheater 81, and after the air is heated, it is discharged into the atmosphere through the chimney through the second induced draft fan 83. The air used for combustion is heated by the air preheater 81 and then enters the burner 124 through the blower 82, providing oxygen and heat for the combustion process in the burner.

[0098] In another alternative embodiment, referring to Figures 4 to 6 As shown, the system may also include: a protective gas supply device 9; the protective gas supply device is connected to the first drying chamber 113 and the second drying chamber 122 respectively through a first protective gas inlet 1111 arranged on the drying and dehydration device 11 and a second protective gas inlet 1121 arranged on the thermal desorption and oil removal device 12.

[0099] The moving parts in the embodiment of the present invention are sealed with inert gas to prevent the gases generated during the drying pretreatment and thermal desorption treatment from leaking into the environment and causing harm to the device in the present invention, thereby improving the safety of the process and the device.

[0100] In a specific embodiment, the above-mentioned oil-containing solid waste thermal desorption integrated machine in the embodiment of the present invention can use different heat sources according to different application scenarios. Figure 5 As shown in the figure, in the application scenario of an oil refinery, the hot steam generated during the oil refining process can be used as an external heat source for the drying and dehydration device. Figure 6 As shown, in the application scenario without external heat source, the gas treated by the condensing equipment and the external gas can be used as the energy source of the burner in the thermal desorption oil removal device, and the flue gas generated after the combustion can be used as the heat source of the drying and dehydration device. For example, the above flue gas can refer to Figure 2 The flue gas duct is discharged into the above-mentioned drying and dehydration device.

[0101] It should be noted that the thermal desorption oil removal device using gas fuel as a heat source can not only use external fuel gas as a heat source, but also use the non-condensable gas remaining after the thermal desorption tail gas is condensed as a heat source, thereby reducing the consumption of external fuel gas and reducing operating costs.

[0102] The following are the applications of the oily solid waste drying system in different scenarios:

[0103] <Scene 1: Refinery Scene>

[0104] Reference Figure 5 As shown, the oil sludge generated in the refining process of the refinery is transported to the material bin 2 by a transport vehicle, and is transported to the drying and dehydration device 11 through the material inlet by the material feeder 6. The solid waste residue in the slag bin 3 is transported to the drying and dehydration device 11 through the material inlet by the residue feeder 7.

[0105] The heat carriers such as steam (160-180°C) provided by the refinery enter the jacket chamber 112 and the hollow shaft of the double-shaft hollow stirring section 114 through the first heat carrier inlet 1121 and the second heat carrier inlet 1141, respectively, to achieve drying pretreatment of the oil-containing solid waste materials. During the material drying pretreatment process, the steam (or) releases latent heat of vaporization and condenses (or the heat carrier is cooled after releasing heat), and the condensed steam (or the cooled heat carrier) returns to the refinery heat carrier recovery system through the first heat carrier outlet 1122 and the second heat carrier outlet 1142.

[0106] The gas (130°C) generated during the drying process of the drying and dehydration device 11 passes through the first evaporation gas outlet 1133 and the first dust collector group 41 to remove solid particles and then enters the second condensation tower 55 for condensation treatment. The dried oil-containing solid waste material and residue (130°C) enter the thermal desorption oil removal device 12 through the first material outlet 1132.

[0107] In the oil refinery scenario, the thermal desorption oil removal device 12 uses electromagnetic heating to heat the oil-containing solid waste material and residue to 350-450°C for thermal desorption. The residue after thermal desorption enters the slag bin 3 for storage through the second material outlet 1222, and the gas generated by thermal desorption enters the first condensation tower 53 through the second evaporation gas outlet 1223 and the second dust collector group 42.

[0108] The gas (350-450°C) entering the first condensation tower 53 is directly contacted with alkaline water in the first condensation tower 53 to exchange heat, so that the temperature of the gas is reduced to 300°C. The heavy oil (density 900-1000kg / m 3 ) and alkaline water (density 1200kg / m 3) together fall into the bottom of the first condensation tower 53, where they are separated. The separated alkaline water is continuously sprayed by the second circulation pump 532, and the separated heavy oil is accumulated for a period of time and then enters the first condensate storage tank 54 for storage.

[0109] The gas condensed in the first condensation tower 53 enters the second condensation tower 55 and the third condensation tower 57 in sequence. The temperature of the gas is reduced to 130°C in the second condensation tower 55, and the light oil (density 825-845 kg / m 3 ) components are separated from the gas, and the condensed light oil enters the second condensate storage tank 56 for storage. The gas temperature is reduced to 50°C in the third condensation tower 57, the water in the gas is separated from the gas, and the condensed water enters the third condensate storage tank 58 for storage. The non-condensable gas (non-condensable gas) is sent to the refinery flare system by the first induced draft fan 59 for treatment.

[0110] The circulating cooling water is cooled to 7°C in the chiller 51 and transported to the third condensation tower 57, the second condensation tower 55 and the first condensation tower 53 through the first circulation pump 52. The circulating cooling water absorbs heat in the condenser and its temperature rises. The heated circulating cooling water returns to the chiller 51 for cooling. During the condensation process, the circulating cooling water flows in the heat exchange tube and does not contact the condensed medium.

[0111] The inert gas generated by the inert gas protection system enters the connection between the rotating parts and the fixed parts of the drying and dehydration device 11 and the thermal desorption and oil removal device 12 through the first protective gas inlet 1111 and the second protective gas inlet 1121 to prevent the gas generated during the drying pretreatment process and the thermal desorption treatment process from leaking into the environment.

[0112] <Scenario 2: Non-refinery scenario>

[0113] Reference Figure 6 As shown, in the treatment of oil-containing solid waste without heat carrier heat source, for example, the oil-containing solid waste generated during oil production or drilling is transported to the material bin 2 by a transport vehicle, and is transported to the drying and dehydration device 11 through the first material inlet 1131 by the material feeder 6. The residue in the residue bin 3 is transported to the drying and dehydration device 11 by the residue feeder 7 through the first material inlet 1131. The material and the residue are mixed and tempered in the drying and dehydration device 11.

[0114] The material and residue are pre-treated by drying in the drying and dehydration device 11. The heat for the pre-treatment is provided by the high-temperature flue gas. After the pre-treatment, the material and residue (130°C) enter the thermal desorption and oil removal device 12 through the first material outlet 1132 and the telescopic pipe 13. The gas (130°C) generated during the drying process passes through the first evaporation gas outlet 1122 and the first dust collector group 41 to remove solid particles and then enters the second condensation tower 55 for condensation treatment.

[0115] The heat source required for the thermal desorption process is provided by the combustion heat of the external fuel gas 10 and the non-condensable gas. The residue (350-450°C) after the thermal desorption process enters the slag bin 3 for storage through the second material outlet 1222, and the gas (350-450°C) generated by the thermal desorption enters the first condensation tower 53 through the second evaporation gas outlet 1223 and the second dust collector group 42.

[0116] The external combustion gas 10 and the non-condensable gas enter the burner 124 of the thermal desorption oil removal device 12, and burn with the hot air heated by the air preheater 81 in the burner 124. The flame and high-temperature flue gas (above 1200°C) generated by the combustion transfer heat to the heater in the radiation heat exchange chamber by means of radiation heat transfer. The oil-containing solid waste materials and residues in the heater absorb the heat of the flame and the high-temperature flue gas to complete the thermal desorption process. After the high-temperature flue gas releases heat, the temperature drops to 600-900°C, and enters the drying and dehydration device 11 through the flue gas duct 15.

[0117] The flue gas (600-900°C) enters the jacket chamber 112 and the hollow shaft of the double-shaft hollow stirring section 114 through the flue gas duct 15, the first heat carrier inlet 1121 and the second heat carrier inlet 1141, respectively, to dry and pre-treat the material and residue. During the drying and pre-treating process of the material and residue, the flue gas releases heat and the temperature drops to 300°C. The cooled flue gas (300°C) enters the air preheater 81 through the first heat carrier outlet 1122 and the second heat carrier outlet 1142.

[0118] The flue gas (300°C) exchanges heat with air (20°C) in the air preheater 81, and the flue gas temperature is reduced to 130°C and is transported to the chimney 84 by the second induced draft fan 83, and discharged into the atmosphere through the chimney 84. The air is sent into the air preheater 81 by the blower 82, and the air preheater 81 absorbs the heat of the flue gas and the temperature rises to 60°C. The heated air enters the burner 124 to participate in the combustion reaction.

[0119] The evaporation gas cooling process is consistent with the above-mentioned refinery scenario, except that the non-condensable gas (non-condensable gas) is sent into the burner 124 by the first induced draft fan 59 for combustion reaction.

[0120] The operation process of circulating cooling water and inert gas is also consistent with the above refinery scenario and will not be repeated here.

[0121] Based on the same inventive concept, an oil-containing solid waste drying method is also provided in an embodiment of the present invention, referring to Figure 7 As shown, the method may include the following steps:

[0122] Step S71: The oily solid waste and the residue are mixed in a drying and dehydration device in an oily solid waste thermal desorption integrated machine to obtain a mixture.

[0123] Step S72: The mixture is pre-treated by heating in a drying and dehydration device. After dehydration, the mixture is discharged into a thermal desorption and oil removal device in an integrated thermal desorption machine for oil-containing solid waste for thermal desorption and oil removal. The treated residue is discharged into a slag bin.

[0124] The heat source of the above-mentioned drying and dehydration device in this embodiment is supplied by an external heat source, and the heat source of the thermal desorption and oil removal device is supplied by the electromagnetic heater built into the thermal desorption and oil removal device; or, the heat source of the thermal desorption and oil removal device is supplied by the burner built into the thermal desorption and oil removal device, and the drying and dehydration device uses the flue gas generated after the burner burns as a heat source. The fuel gas source of the burner is: uncondensed gas treated by the condensing equipment; and / or, gas treated by the air preheater discharged from the first heat carrier outlet and the second heat carrier outlet of the drying and dehydration device; and / or, external fuel gas. "And / or" in the embodiment of the present invention means that at least one of the above conditions is satisfied.

[0125] Step S73: the evaporated gas evaporated from the drying and dehydration device and the evaporated gas evaporated from the thermal desorption and oil removal device are subjected to dust removal treatment by a dust removal device and then discharged into a condensation device for condensation treatment.

[0126] The relevant description and beneficial effects of the above-mentioned application and drying method in the embodiment of the present invention can be referred to the specific description of the above-mentioned all-in-one machine and system, which will not be repeated here.

[0127] Obviously, various changes and modifications may be made to the present invention by those skilled in the art without departing from the spirit and scope of the present invention. The present disclosure is not limited to the precise structure described above and shown in the accompanying drawings, and various changes and modifications may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims. Thus, if these changes and modifications of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these changes and modifications.

Claims

1. An integrated thermal desorption machine for oil-containing solid waste, characterized in that: include: Drying and dehydration device and thermal desorption and oil removal device; The drying and dehydration device and the thermal desorption and oil removal device are drying treatment equipment, and the material outlet of the drying and dehydration device is connected to the material inlet of the thermal desorption and oil removal device through a retractable pipeline; The drying and dehydration device comprises: a first shell, a jacket chamber and a first drying chamber; a double-shaft hollow stirring part is arranged in the first drying chamber; a first heat carrier inlet and a first heat carrier outlet are arranged in the jacket chamber; a first protective gas inlet is arranged on the first shell, and the first protective gas inlet is communicated with the first drying chamber; The thermal desorption oil removal device includes: a second shell, a second drying chamber and a heating device are arranged in the second shell, and a double-helix driving part is arranged in the second drying chamber; a second protective gas inlet is arranged on the second shell, and the second protective gas inlet is connected to the second drying chamber.

2. The all-in-one machine according to claim 1, characterized in that: Also includes: Adjusting baffle; the adjusting baffle is arranged at the material outlet of the drying and dehydration device; or, The regulating baffle is arranged at the material inlet of the thermal desorption oil removal device; or, The regulating baffle is arranged in a retractable pipe between the material outlet of the drying and dehydration device and the material inlet of the thermal desorption and oil removal device.

3. The all-in-one machine according to claim 1, characterized in that: The heating device is an electromagnetic heater and / or a burner.

4. The integrated machine according to any one of claims 1 to 3, characterized in that: The double-shaft hollow stirring part is also provided with a second heat carrier inlet and a second heat carrier outlet; The first heat carrier inlet and the second heat carrier inlet are used to connect to an external heat carrier, or are communicated with the chamber where the heating device is located.

5. Application of the integrated thermal desorption machine for oil-containing solid waste as claimed in any one of claims 1 to 4 in an oil-containing solid waste drying system.

6. An oil-containing solid waste drying system, characterized in that: include: A material bin, a slag bin, a dust removal device, a condensation device, and an integrated thermal desorption machine for oil-containing solid waste according to any one of claims 1 to 4; The material bin is in communication with the material inlet of the drying and dehydration device; The slag bin is in communication with the material outlet of the thermal desorption oil removal device; The condensing device is communicated with the first drying chamber and the second drying chamber respectively through the dust removal device.

7. The system according to claim 6, characterized in that The slag bin is communicated with the material inlet of the drying and dehydration device.

8. The system according to claim 6, characterized in that The dust removal equipment comprises: a first dust collector group and a second dust collector group; The condensing equipment comprises: a chiller, a first circulating pump, a first condensing tower, a first condensate storage tank connected to the first condensing tower, a second condensing tower, a second condensate storage tank connected to the second condensing tower, a third condensing tower and a third condensate storage tank connected to the third condensing tower; The chiller is sequentially connected with the first circulation pump and the condensation pipelines of the third condensation tower, the second condensation tower, and the first condensation tower to form a passage; The first drying chamber is connected to the second condensation tower via a first evaporation gas outlet and the first dust collector group; the second drying chamber is connected to the first condensation tower via a second evaporation gas outlet and the second dust collector group.

9. The system according to claim 8, characterized in that The system further comprises a second circulation pump. A spray device is arranged in the first condensation tower. The second circulation pump is respectively connected to the bottom of the first condensation tower and the spray device.

10. The system according to claim 8, characterized in that Also includes: A first induced draft fan is connected to an exhaust port of the third condensation tower.

11. The system according to claim 10, characterized in that The exhaust port of the third condensation tower is connected to the burner in the thermal desorption oil removal device through the first induced draft fan.

12. The system according to claim 6, characterized in that Also includes: Air preheating equipment; The air preheating device comprises: an air preheater, and a blower and a second induced draft fan respectively connected to the air preheater; One end of the air preheater is connected to the first heat carrier outlet and the second heat carrier outlet respectively, and the other end is connected to the burner in the thermal desorption oil removal device.

13. The system according to any one of claims 6 to 12, characterized in that: Also includes: Shielding gas supply equipment; The protective gas supply device is connected to the first drying chamber and the second drying chamber respectively through a first protective gas inlet arranged on the drying and dehydration device and a second protective gas inlet arranged on the thermal desorption and oil removal device.

14. A method for drying oil-containing solid waste, characterized in that: include: The oil-containing solid waste and the residue are mixed in a drying and dehydration device in the oil-containing solid waste thermal desorption integrated machine to obtain a mixture; wherein the oil-containing solid waste thermal desorption integrated machine is the oil-containing solid waste thermal desorption integrated machine according to any one of claims 1 to 4; The mixture is heated and pre-treated in the drying and dehydration device, and after dehydration, the mixture is discharged into the thermal desorption and oil removal device in the oil-containing solid waste thermal desorption integrated machine for thermal desorption and oil removal, and the treated residue is discharged into the slag bin; The evaporated gas evaporated in the drying and dehydration device and the evaporated gas evaporated in the thermal desorption and oil removal device are discharged into the condensation device for condensation treatment after being dedusted by the dedusting equipment.

15. The method according to claim 14, characterized in that The heat source of the drying and dehydration device is supplied by an external heat source, and the heat source of the thermal desorption and oil removal device is supplied by a built-in electromagnetic heater of the thermal desorption and oil removal device; or, The heat source of the thermal desorption oil removal device is supplied by a burner built into the thermal desorption oil removal device, and the drying and dehydration device uses the flue gas generated by the burner as a heat source.

16. The method according to claim 15, characterized in that The fuel gas source of the burner is: uncondensed gas after being processed by the condensing device; and / or, gas discharged through the first heat carrier outlet and the second heat carrier outlet of the drying and dehydration device after being treated by an air preheater; and / or, external fuel gas.

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