Electromagnetic heating rotary kiln reverse double drive oily sludge thermal desorption equipment

Abstract

This invention discloses an electromagnetically heated rotary kiln reverse dual-drive oily sludge thermal desorption device, comprising a supporting shell, which includes a frame and two sets of sealing mechanisms, respectively disposed at both ends of the inner wall of the frame; a rotary conveying assembly is rotatably inserted in the middle of the frame, the rotary conveying assembly including a processing cylinder, a feeding cylinder, a discharging cylinder, and a screw shaft mechanism, the screw shaft mechanism being rotatably inserted in the middle of the processing cylinder; a first drive mechanism and a second drive mechanism are respectively disposed at both ends of the rotary conveying assembly; the first drive mechanism includes a sprocket mechanism; the second drive mechanism includes a screw variable frequency motor. The development of this oily sludge treatment device, with its designed rotary kiln and built-in screw reverse dual-drive structure, prevents oily sludge from adhering to the inner kiln wall, solves the bottleneck problem in rotary kiln technology for oily sludge treatment, and improves the heat exchange efficiency and heat exchange rate of the kiln's electromagnetic heating line.

Description

Technical Field

[0001] This invention relates to the field of drilling waste treatment equipment, and in particular to an electromagnetically heated rotary kiln reverse dual-drive oily sludge thermal desorption device. Background Technology

[0002] During the drilling process in oil and gas exploration and development, a large amount of waste is inevitably generated, posing a potential threat to the environment. Drilling waste is one of the main sources of pollution in oil and gas field exploration and development. It mainly consists of drilling cuttings, waste drilling fluid, and rock cuttings. It is a multiphase steady-state colloidal suspension system containing clay, oil (waste oil-based mud), weighting materials, various chemical treatment agents, wastewater, and drill cuttings. Its main environmentally harmful components are hydrocarbons, various polymers, certain metal ions such as mercury, copper, arsenic, chromium, zinc, lead, and impurities in barite. If these wastes are not treated properly and are discharged arbitrarily, or if they are improperly managed and treated, long-term accumulation and leaching into the ground by rainwater will cause serious pollution to the surrounding soil, vegetation, surface water, and groundwater.

[0003] The development trend of oily sludge treatment projects is rapid, which puts forward higher requirements for oily flue gas treatment equipment. The use of rotary kiln technology to treat oily sludge has become an industry trend. However, the application of rotary kilns in the field of oily sludge treatment is prone to traditional problems such as serious wall adhesion and low thermal efficiency. Traditional heating technology has low heat transfer efficiency and the heat source cannot be provided in all time domains. Summary of the Invention

[0004] The purpose of this invention is to provide an electromagnetically heated rotary kiln reverse dual-drive oily sludge thermal desorption device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an electromagnetically heated rotary kiln reverse dual-drive oily sludge thermal desorption device, comprising:

[0006] The support shell includes a frame and two sets of sealing mechanisms, which are respectively disposed at both ends of the inner wall of the frame for sealing the feed end and the discharge end of the frame.

[0007] A rotary conveying assembly is rotatably interspersed in the middle of the frame. The rotary conveying assembly includes a processing cylinder, a feeding cylinder, a discharging cylinder, and a screw shaft mechanism. The screw shaft mechanism is rotatably interspersed in the middle of the processing cylinder for rotating and conveying materials.

[0008] The rotary conveying assembly is provided with a first drive mechanism and a second drive mechanism at its two ends, respectively.

[0009] The first drive mechanism includes a sprocket mechanism;

[0010] The second drive mechanism includes a spiral variable frequency motor for driving the spiral shaft mechanism to rotate;

[0011] Inside the frame, and on the outer wall of the processing cylinder, are three sets of electromagnetic heating mechanisms for heating the processing cylinder.

[0012] Preferably, the feed cylinder is inserted at one end of the processing cylinder and its top extends through the top of the frame, and the discharge cylinder is inserted at the other end of the processing cylinder for discharging material.

[0013] Preferably, the two sets of sealing mechanisms are respectively fitted at the connection between the feed cylinder and the discharge cylinder and the processing cylinder.

[0014] Preferably, both ends of the spiral shaft mechanism are provided with spiral support bearing seats, and the end of the spiral shaft mechanism near the discharge cylinder is fixedly connected to the output end of the spiral variable frequency motor.

[0015] Preferably, the sprocket mechanism is engaged at one end of the processing cylinder near the feed cylinder, and is used to drive the processing cylinder to rotate.

[0016] Preferably, the outer walls at both ends of the processing cylinder are provided with support components for supporting the rotation of the processing cylinder.

[0017] Preferably, the support assembly includes a tire mechanism and a kiln roller mechanism. The two tire mechanisms are respectively located at the top of both ends of the processing cylinder, and the two kiln roller mechanisms are respectively located at the bottom of both ends of the processing cylinder. The bottom of the two kiln roller mechanisms is fixedly connected to the inner walls of both ends of the bottom of the frame.

[0018] Preferably, the outer wall of the spiral shaft mechanism is provided with a plurality of brush mechanisms, and the ends of the plurality of brush mechanisms away from the spiral shaft mechanism are interference-fitted with the inner wall of the processing cylinder.

[0019] A method of using an electromagnetically heated rotary kiln reverse dual-drive thermal desorption device, the operation method of the desorption device includes the following steps;

[0020] The first step is to feed the oily sludge to be cleaned into the feed end of the processing cylinder through the feed cylinder, and then power on the electromagnetic heating mechanism to heat the processing cylinder in three stages.

[0021] The second step is to start the spiral variable frequency motor. The spiral variable frequency motor drives the spiral shaft mechanism to rotate through the output shaft. At this time, the oily sludge moves in the treatment cylinder under the agitation of the spiral blades of the spiral shaft mechanism. By controlling the speed and rotation direction of the spiral variable frequency motor, the oily sludge moves horizontally back and forth in the treatment cylinder. At the same time, as the oily sludge moves in the treatment cylinder, the heated treatment cylinder evaporates the water and oil in the oily sludge.

[0022] The third step is to start the sprocket mechanism, which drives the processing cylinder to rotate. At the same time, during the relative rotation between the processing cylinder and the spiral shaft mechanism, the brush mechanism will scrape off the sludge attached to the inner wall of the processing cylinder.

[0023] The fourth step is to control the rotation direction of the spiral variable frequency motor after the water and oil in the sludge are completely removed, so that the obtained reduced soil is transferred from the feed end of the processing cylinder to the discharge end, and then discharged from the equipment through the discharge cylinder.

[0024] The technical effects and advantages of this invention are as follows:

[0025] (1) The research and development of the oil sludge treatment device of the present invention, the design of the rotary kiln and the built-in spiral reverse double transmission structure are applied to the oil sludge treatment, which prevents the oil sludge from sticking to the inner wall of the kiln body, solves the bottleneck problem of rotary kiln in oil sludge treatment technology, and improves the heat exchange efficiency and heat exchange rate of the electromagnetic heating line of the kiln body.

[0026] (2) This invention uses electromagnetic direct heating to improve heat conduction efficiency and solves the problem of energy substitution in places where other energy sources cannot be used in the industry. It uses a variable frequency motor and adjusts the rotation speed and conveying speed of the equipment to control the residence time of the material inside the kiln according to the actual situation of the material. This allows the equipment to control the running time according to the characteristics of different materials, thereby improving the economic performance of the equipment.

[0027] (3) The present invention uses a type 0 electromagnetic heating device to heat the entire shape of the kiln, but the material exists below the center line of the kiln body. By rotating the kiln body, the contact position between the material and the kiln body is changed in real time. By heating the kiln body and rotating the kiln body, the heating area of ​​the material is increased. Attached Figure Description

[0028] Figure 1 This is a cross-sectional view of the overall structure of the present invention.

[0029] In the diagram: 1. Spiral support bearing seat; 2. Frame; 3. Feed cylinder; 4. Sealing mechanism; 5. Tire mechanism; 6. Electromagnetic heating mechanism; 7. Discharge cylinder; 8. Spiral variable frequency motor; 9. Kiln traction wheel mechanism; 10. Spiral shaft mechanism; 11. Brush mechanism; 12. Processing cylinder; 13. Sprocket mechanism. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] This invention provides, for example Figure 1 The electromagnetic heating rotary kiln reverse dual-drive oily sludge thermal desorption device shown includes:

[0032] The bearing shell includes a frame 2 and two sets of sealing mechanisms 4. The two sets of sealing mechanisms 4 are respectively arranged at both ends of the inner wall of the frame 2 for sealing the feed end and the discharge end of the frame 2.

[0033] The frame 2 is mainly composed of a support frame, a reducer platform, and a bearing seat platform. This component supports the weight of the entire equipment. This component is connected to the kiln roller mechanism 9, which transfers the weight of the entire equipment to the frame 2. This component has reserved bolt connection holes, which can be used to connect with other equipment, improving the ease of assembly between the entire equipment and other equipment.

[0034] The sealing mechanism 4 mainly consists of a sealing gland and a sealing packing. It adopts the principle of forming a planar seal to ensure that the inside of the treatment cylinder 12 is connected to the external environment and completely isolated from the air, thereby avoiding the oxygen content in the kiln of the treatment cylinder 12 from exceeding the standard, and thus ensuring that the oxygen content of the whole set of equipment meets the requirements for oil sludge treatment.

[0035] A rotary conveying assembly is rotatably interspersed in the middle of the frame 2. The rotary conveying assembly includes a processing cylinder 12, a feeding cylinder 3, a discharging cylinder 7, and a screw shaft mechanism 10. The screw shaft mechanism 10 is rotatably interspersed in the middle of the processing cylinder 12 for rotating and conveying materials.

[0036] The feed cylinder 3 is mainly composed of a vertical section, a horizontal section, and a flange. The material falls vertically from the vertical section into the horizontal section and is conveyed to the processing cylinder 12 by the screw shaft mechanism 10. This component uses a standard flange for future connection with the feed screw. The properties of the material entering the equipment are strictly controlled (liquid content <30%, oil content <10%) to avoid sticking to the wall during use.

[0037] The discharge cylinder 7 mainly consists of a vertical section (including the discharge port and exhaust port), a horizontal section (including the inlet port) and a discharge cylinder flange. The material is lifted by the rotation of the processing cylinder 12 (with internal lifting plates) and falls into the horizontal section of the discharge cylinder by its own weight. The material is then conveyed to the vertical section (including the discharge port) of the discharge cylinder by the screw shaft mechanism 10. The flue gas after heat adsorption enters the flue gas treatment system through the exhaust port. The discharge cylinder flange adopts a standard flange for future connection with equipment such as the discharge screw.

[0038] The processing cylinder 12 consists of the cylinder itself and a sealed end cap. The cylinder is made of 316L stainless steel and can withstand temperatures above 700℃. The cylinder is heated by an electromagnetic heating mechanism 6, which raises the cylinder temperature. The material comes into contact with the cylinder and the heat from the cylinder is transferred to the material through heat transfer. After the material temperature rises, the oil and water vapor in the sludge evaporate and separate from the solid, achieving the separation of solid material from liquid and gaseous states. Ultimately, a heat-adhesive effect is achieved. The properties of the material entering the equipment are strictly controlled (liquid content <30%, oil content <10%). This prevents the material from sticking to the wall during use. During the rotation of the kiln cylinder, the material has a scouring effect on the cylinder wall, which can prevent the material from sticking to the wall. The dry material itself has a frictional effect, which can also prevent the material from sticking to the wall.

[0039] The feed cylinder 3 is inserted at one end of the processing cylinder 12 and its top extends through the top of the frame 2. The discharge cylinder 7 is inserted at the other end of the processing cylinder 12 for discharging materials.

[0040] Two sets of sealing mechanisms 4 are respectively installed at the connection between the feed cylinder 3 and the discharge cylinder 7 and the processing cylinder 12.

[0041] The rotary conveyor assembly is provided with a first drive mechanism and a second drive mechanism at its two ends, respectively.

[0042] The first drive mechanism includes a sprocket mechanism 13;

[0043] The sprocket mechanism 13 engages at one end of the processing cylinder 12 near the feed cylinder 3, and is used to drive the processing cylinder 12 to rotate.

[0044] The sprocket mechanism 13 consists of a large sprocket, a large sprocket clamping plate, a small sprocket, a chain, a cylinder motor, a cylinder reducer, and a cylinder reducer frequency converter. The large sprocket is connected to the processing cylinder 12 by bolts. The small sprocket is connected to the large sprocket by the chain. The small sprocket is connected to the reducer. The reducer provides power to the device, thereby driving the small sprocket, the large sprocket, and the cylinder to rotate. The rotation direction and speed of the cylinder are adjusted by the cylinder reducer frequency converter, thereby increasing the contact area between the material and the cylinder.

[0045] Both ends of the processing cylinder 12 are provided with support components on their outer walls for supporting the rotation of the processing cylinder 12.

[0046] The support assembly includes a tire mechanism 5 and a kiln roller mechanism 9. The two tire mechanisms 5 are respectively located at the top of both ends of the processing cylinder 12, and the two kiln roller mechanisms 9 are respectively located at the bottom of both ends of the processing cylinder 12. The bottom of the two kiln roller mechanisms 9 is fixedly connected to the inner wall of both ends of the bottom of the frame 2.

[0047] The tire mechanism 5 consists of a tire, tire gaskets, tire fixing bolts, and tire pressure plates. It connects to the processing cylinder 12 via bolts, transferring the processing cylinder 12 to the kiln roller mechanism 9. The tire and the roller seat are in line contact. This ensures that the processing cylinder 12 can rotate, thereby increasing the contact area between the material and the cylinder.

[0048] The kiln roller mechanism 9 consists of rollers, roller bases, bearings, roller shafts, sealing caps, and fixing bolts. It contacts the tire mechanism 5 via line contact to transfer the weight of the processing cylinder 12 to the frame 2. The kiln roller mechanism 9 is bolted to the frame 2. There are rollers on both sides of the kiln, one side is a double-sided roller and the other side is a single-sided roller. The double-sided rollers fix the tire to ensure that it does not move in the horizontal direction. The single-sided roller is located on the side closer to the double-sided rollers. As the kiln elongates after being heated, it ensures that the kiln moves away from the side of the single-sided roller, avoiding the kiln from rolling vertically after being fixed at both ends. This ensures that the kiln does not suffer adverse consequences due to its free elongation after being heated.

[0049] The second drive mechanism includes a spiral variable frequency motor 8, which is used to drive the spiral shaft mechanism 10 to rotate.

[0050] The spiral variable frequency motor 8 consists of a frequency converter, an explosion-proof motor, and a reducer. This system provides power to the spiral shaft mechanism 10, driving the spiral shaft mechanism 10 to rotate. The frequency converter adjusts the rotation direction and frequency of the motor, thereby changing the rotation direction and speed of the spiral shaft mechanism 10, thus realizing the conveying direction of the material and its residence time inside the kiln.

[0051] The spiral shaft mechanism 10 consists of a shaft, a splined sleeve, a large spiral blade, a small spiral blade, and a brush welding fixing plate. The splined sleeve is connected to the spiral support bearing seat 1 via a spline, transmitting power from the spiral variable frequency motor 8 to the device, thereby driving the spiral blades to rotate and move the material. The large and small blades at both ends have different pitches; by adjusting the blade pitch, rapid material feeding and output are achieved, resulting in a large heating area and a small discharge area, achieving the effect of rapid feeding and slow heating. The brush welding fixing plate is connected to the brush mechanism 11 via bolts, providing power to the brush mechanism 11.

[0052] Both ends of the spiral shaft mechanism 10 are provided with spiral support bearing seats 1, and the end of the spiral shaft mechanism 10 near the discharge cylinder 7 is fixedly connected to the output end of the spiral variable frequency motor 8.

[0053] The spiral support bearing housing 1 mainly consists of a shaft, bearing housing, sealing packing and driven shaft. This component is used to support the spiral shaft mechanism 10 and is connected to the spiral variable frequency motor 8 through the driven shaft. This part adopts a spline connection to improve the equipment assembly speed.

[0054] Inside the frame 2, and on the outer wall of the processing cylinder 12, three sets of electromagnetic heating mechanisms 6 are fitted for heating the processing cylinder 12.

[0055] The electromagnetic heating mechanism 6 consists of a coil frame, heating cables, a control cabinet, and a coil support base. The coil is fitted onto the processing cylinder 12, employing a full-bridge electromagnetic heating principle to provide a heat source for the entire system. By adjusting the distance between the electromagnetic coil and the cylinder, the electromagnetic heating duty cycle is optimized, thereby improving the heating efficiency of the entire system and maximizing its economic benefits. The equipment is divided into three sections, reducing the weight and length of each individual section. This also reduces the assembly precision of the electromagnetic heating device and improves assembly efficiency.

[0056] The outer wall of the spiral shaft mechanism 10 is provided with a plurality of brush mechanisms 11, and the ends of the plurality of brush mechanisms 11 away from the spiral shaft mechanism 10 are interference-fitted with the inner wall of the processing cylinder 12.

[0057] The brush mechanism 11 consists of a stainless steel brush and a brush fixing plate. The device is interference-fitted with the treatment cylinder 12. The oil sludge adhering to the treatment cylinder 12 is cleaned by the rotation of the spiral shaft mechanism 10. The brush is made of highly flexible stainless steel bristles, which can improve the cleaning ability and durability of the brush device.

[0058] Working principle of this invention: (Refer to...) Figure 1 When using this device, the following operations are required;

[0059] The first step involves feeding the oily sludge to be cleaned into the feed end of the processing cylinder 12 through the feed cylinder 3. Then, the electromagnetic heating mechanism 6 is powered on to heat the processing cylinder 12 in three stages, thereby heating and evaporating the oily sludge that has entered the processing cylinder 12.

[0060] In the second step, the spiral variable frequency motor 8 is started. The spiral variable frequency motor 8 drives the spiral shaft mechanism 10 to rotate through the output shaft. At this time, the oily sludge moves in the treatment cylinder 12 under the agitation of the spiral blades of the spiral shaft mechanism 10. By controlling the speed and rotation direction of the spiral variable frequency motor 8, the oily sludge moves horizontally and reciprocally in the treatment cylinder 12. At the same time, as the oily sludge moves in the treatment cylinder 12, the heated treatment cylinder 12 evaporates the water and oil in the oily sludge through heat conduction.

[0061] The third step involves activating the sprocket mechanism 13, which drives the processing cylinder 12 to rotate. This rotation causes the sludge inside the processing cylinder 12 to tumble, increasing the contact area between the sludge and the processing cylinder 12. Simultaneously, during the relative rotation between the processing cylinder 12 and the spiral shaft mechanism 10, the brush mechanism 11 scrapes off the sludge adhering to the inner wall of the processing cylinder 12.

[0062] In the fourth step, after the water and oil in the sludge are completely removed, the rotation direction of the spiral variable frequency motor 8 is controlled so that the obtained reduced soil is transferred from the feed end of the processing cylinder 12 to the discharge end, and then discharged from the equipment through the rotation of the discharge cylinder 7.

[0063] Example 2: A method of using an electromagnetic heating rotary kiln reverse dual-drive thermal desorption device, the operation method of the desorption device includes the following steps;

[0064] The first step is to feed the oily sludge to be cleaned into the feed end of the processing cylinder 12 through the feed cylinder 3, and then power on the electromagnetic heating mechanism 6 to start the three-stage heating of the processing cylinder 12.

[0065] The second step is to start the spiral variable frequency motor 8. The spiral variable frequency motor 8 drives the spiral shaft mechanism 10 to rotate through the output shaft. At this time, the oily sludge moves in the treatment cylinder 12 under the stirring of the spiral blades of the spiral shaft mechanism 10. By controlling the speed and rotation direction of the spiral variable frequency motor 8, the oily sludge moves horizontally and reciprocally in the treatment cylinder 12. At the same time, when the oily sludge moves in the treatment cylinder 12, the heated treatment cylinder 12 evaporates the water and oil in the oily sludge.

[0066] The third step is to start the sprocket mechanism 13, which drives the processing cylinder 12 to rotate. At the same time, during the relative rotation between the processing cylinder 12 and the spiral shaft mechanism 10, the brush mechanism 11 will scrape off the sludge attached to the inner wall of the processing cylinder 12.

[0067] The fourth step is to control the rotation direction of the spiral variable frequency motor 8 after the water and oil in the sludge are completely removed, so that the obtained reduced soil is transferred from the feed end of the processing cylinder 12 to the discharge end, and then discharged into the equipment through the discharge cylinder 7.

[0068] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A reverse dual-drive electromagnetic heating rotary kiln thermal desorption device for oily sludge, comprising: The support shell includes a frame (2) and two sets of sealing mechanisms (4). The two sets of sealing mechanisms (4) are respectively set at both ends of the inner wall of the frame (2) for sealing the feed end and the discharge end of the frame (2). The feature is that a rotary conveying assembly is rotatably interspersed in the middle of the frame (2), the rotary conveying assembly includes a processing cylinder (12), a feeding cylinder (3), a discharging cylinder (7) and a screw shaft mechanism (10), the screw shaft mechanism (10) is rotatably interspersed in the middle of the processing cylinder (12) for rotating and conveying materials; The rotary conveying assembly is provided with a first drive mechanism and a second drive mechanism at its two ends, respectively. Both ends of the spiral shaft mechanism (10) are provided with spiral support bearing seats (1), and the end of the spiral shaft mechanism (10) near the discharge cylinder (7) is fixedly connected to the output end of the spiral frequency conversion motor (8). The first drive mechanism includes a sprocket mechanism (13); The sprocket mechanism (13) engages at one end of the processing cylinder (12) near the feed cylinder (3) to drive the processing cylinder (12) to rotate; The outer walls at both ends of the processing cylinder (12) are provided with support components for supporting the rotation of the processing cylinder (12); The support assembly includes a tire mechanism (5) and a kiln roller mechanism (9). The two tire mechanisms (5) are respectively located at the top of both ends of the processing cylinder (12), and the two kiln roller mechanisms (9) are respectively located at the bottom of both ends of the processing cylinder (12). The bottom of the two kiln roller mechanisms (9) is respectively fixedly connected to the inner walls of both ends of the bottom of the frame (2). The kiln trolley mechanism (9) consists of a trolley, a trolley base, a bearing, a trolley shaft, a sealing cap, and fixing bolts. It contacts the tire mechanism (5) through line contact to transfer the weight of the processing cylinder (12) to the frame (2). The kiln trolley mechanism (9) is bolted to the frame (2). The kiln has two trolleys on both sides, one side is a double-sided trolley and the other side is a single-sided trolley. The double-sided trolleys fix the tire to ensure that it does not move in the horizontal direction. The single-sided trolley is located on the side close to the double-sided trolleys. As the kiln is heated and elongates, it can ensure that the kiln moves away from the side of the single-sided trolley. The second drive mechanism includes a spiral variable frequency motor (8) for driving the spiral shaft mechanism (10) to rotate; Inside the frame (2) and on the outer wall of the processing cylinder (12), three sets of electromagnetic heating mechanisms (6) are fitted for heating the processing cylinder (12).

2. The electromagnetic heating rotary kiln reverse dual-drive oily sludge thermal desorption device according to claim 1, characterized in that, The feed cylinder (3) is inserted at one end of the processing cylinder (12) and its top extends through the top of the frame (2). The discharge cylinder (7) is inserted at the other end of the processing cylinder (12) for discharging materials.

3. The electromagnetic heating rotary kiln reverse dual-drive oily sludge thermal desorption device according to claim 2, characterized in that, The two sets of sealing mechanisms (4) are respectively fitted at the connection between the feed cylinder (3) and the discharge cylinder (7) and the processing cylinder (12).

4. The electromagnetic heating rotary kiln reverse dual-drive oily sludge thermal desorption device according to claim 3, characterized in that, The outer wall of the spiral shaft mechanism (10) is provided with a plurality of brush mechanisms (11), and the ends of the plurality of brush mechanisms (11) away from the spiral shaft mechanism (10) are interference-fitted with the inner wall of the processing cylinder (12).

5. A method of using an electromagnetically heated rotary kiln reverse dual-drive oily sludge thermal desorption device, characterized in that, The electromagnetic heating rotary kiln reverse dual-drive oily sludge thermal desorption equipment according to claim 4 includes the following steps in its operation method; The first step is to feed the oily sludge to be cleaned through the feed cylinder (3) to the feed end of the processing cylinder (12), and then power on the electromagnetic heating mechanism (6) to heat the processing cylinder (12) in three stages. The second step is to start the spiral variable frequency motor (8). The spiral variable frequency motor (8) drives the spiral shaft mechanism (10) to rotate through the output shaft. At this time, the oily sludge moves in the treatment cylinder (12) under the stirring of the spiral blades of the spiral shaft mechanism (10). By controlling the speed and rotation direction of the spiral variable frequency motor (8), the oily sludge moves horizontally back and forth in the treatment cylinder (12). At the same time, when the oily sludge moves in the treatment cylinder (12), the heated treatment cylinder (12) evaporates the water and oil in the oily sludge. The third step is to start the sprocket mechanism (13), which drives the processing cylinder (12) to rotate. At the same time, during the relative rotation of the processing cylinder (12) and the spiral shaft mechanism (10), the brush mechanism (11) will scrape off the sludge attached to the inner wall of the processing cylinder (12). The fourth step is to control the rotation direction of the spiral variable frequency motor (8) after the water and oil in the sludge are completely removed, so that the obtained reduced soil is transferred from the feed end of the processing cylinder (12) to the discharge end, and then discharged into the equipment through the discharge cylinder (7).

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