Efficient separation and treatment integrated device for oily sludge in oil field

Abstract

The invention belongs to the technical field of sludge treatment, and particularly provides an oil field oily sludge efficient separation and treatment integrated device which comprises a base, a motor fixedly arranged on the base and a separator arranged on an output shaft of the motor, the separator comprises a centrifugal disc and a self-spinning filtering assembly, the centrifugal disc is fixedly arranged on the output shaft of the motor, and the self-spinning filtering assembly is arranged on the base. The self-rotating filtering assemblies are distributed in an annular array mode and connected to the circumferential outer wall of the centrifugal disc in a penetrating mode. The oil-containing sludge is centrifugally separated by virtue of a rotary centrifugal effect, a filter disc in the self-spinning filter assembly realizes self spinning in cooperation with an airflow effect in a rotary motion process, the function of filtering and separating petroleum hydrocarbon is realized only by virtue of the rotary centrifugal effect, and solid impurities can be transferred and conveyed; and the filter cartridge rotates to exchange the orientation of the filter holes, so that the filter holes in the filter cartridge realize automatic cleaning and blockage prevention under the action of centrifugal force, and the oily sludge can be continuously and efficiently filtered and separated.

Description

Technical Field

[0001] The invention belongs to the technical field of sludge treatment, and in particular relates to an integrated device for efficiently separating and treating oily sludge in an oil field. Background Art

[0002] A large amount of oily sludge is often produced during the oil extraction, refining and processing in oil fields. The oily sludge contains a large amount of petroleum hydrocarbons, solid particles, water and various impurities. It is not only difficult to separate and treat, but also very easy to pollute the environment.

[0003] Currently, there are many technologies that can treat oily sludge, such as incineration, pyrolysis, mechanical separation, biodegradation, solvent extraction, etc. When separating oily sludge, it is usually necessary to use filtering equipment to separate petroleum hydrocarbons and solid impurities, but the following problems are common: (1) Existing oily sludge separation and treatment technologies are difficult to operate continuously. Usually, it is necessary to suck part of the oily sludge into the equipment and then proceed to the next treatment after the treatment is completed, which is inefficient. (2) Existing oily sludge separation and treatment equipment usually only performs one-way filtration when filtering and separating petroleum hydrocarbons and solid impurities. The equipment is very easy to get clogged and requires constant cleaning or replacement of filter components to achieve continuous operation. Summary of the Invention

[0004] In response to the above technical problems, the present invention provides an integrated device for efficiently separating and treating oily sludge in oil fields. The separator is innovatively designed to centrifugally separate the oily sludge with the help of rotating centrifugal action. The airflow during the rotating motion enables the filter disc in the spin filter assembly to spin. The function of filtering and separating petroleum hydrocarbons is achieved solely through the rotating centrifugal action. Solid impurities can also be transferred and transported. The rotation of the filter cartridge can exchange the direction of the filter holes, so that the filter holes in the filter cartridge can be automatically cleaned and prevented from blocking under the action of centrifugal force, thereby continuously and efficiently filtering and separating the oily sludge.

[0005] The technical solution adopted by the present invention is as follows: This solution provides an integrated device for efficient separation and treatment of oily sludge in an oil field, comprising a base, a motor fixedly arranged on the base, and a separator arranged on an output shaft of the motor, the base being fixedly connected with an oil receiving ring, the oil receiving ring being fixedly connected with a slag removal ring, the slag removal ring being fixedly connected with a feed hopper, the feed hopper and the upper end of the separator being through-connected, the separator comprising a centrifugal disc, a heating tube, a spin filter assembly, a slag rejection ring and an oil guide ring, the centrifugal disc being fixedly arranged on the output shaft of the motor, the centrifugal disc being hollow, the heating tube being through-connected to the upper wall of the centrifugal disc, the upper end of the heating tube being rotatably through-connected to the lower end of the feed hopper, an electric heating wire being arranged in the circumferential wall of the heating tube, the spin filter assemblies being distributed in an annular array and through-connected to the circumferential outer wall of the centrifugal disc, the slag rejection ring being fixedly connected to the outer end portions of all the spin filter assemblies, the slag rejection ring being rotatably arranged in the slag removal ring, the oil guide ring being through-connected to all the spin filter assemblies, and the oil guide ring being rotatably arranged in the oil receiving ring.

[0006] Furthermore, the spin-on filter assembly includes an inlet pipe, a centrifugal sleeve, an outlet pipe, a filter plate and an oil outlet pipe. The inlet pipe is fixedly connected to the circumferential outer wall of the centrifugal plate. The centrifugal sleeve is fixedly arranged at the outer end of the inlet pipe. The outlet pipe is fixedly connected to the circumferential outer wall of the centrifugal sleeve. The inlet pipe, centrifugal sleeve and outlet pipe are arranged in sequence. The filter plate is rotatably arranged on the inner wall of the centrifugal sleeve. The oil outlet pipe is fixedly arranged on the side wall of the centrifugal sleeve. One end of the oil outlet pipe is rotatably connected to the filter plate, and the other end of the oil outlet pipe is fixedly connected to the oil guide ring.

[0007] The filter disc consists of a circular plate, a filter cartridge, a ring plate, a partition plate and an impeller. The circular plate and the ring plate are coaxially fixedly connected to the two ends of the filter cartridge respectively. The filter disc is rotatably arranged in the centrifugal sleeve through the circular plate and the ring plate. The filter cartridge is a hollow cylindrical structure. The circumferential wall array of the filter cartridge is provided with filter holes. The oil outlet pipe is rotationally sealed with the ring plate. The partition plates are distributed and fixed on the outer circumferential wall of the filter cartridge in an annular array. The two ends of the partition plate are respectively fixedly connected to the side walls facing each other of the circular plate and the ring plate. The impeller is coaxially fixedly connected to the outer wall of the circular plate. The end of the oil outlet pipe is fixedly provided with an oil retaining tile. The oil retaining tile is located on the side of the filter cartridge away from the throwing-in pipe.

[0008] The end of the ejection pipe away from the ejection pipe is fixedly passed through the slag ejection rotating ring, and the outer circumferential wall of the slag ejection rotating ring is fixedly provided with a material stripping plate distributed in a circular array. The material stripping plate is located on the side of the end of the ejection pipe, and the material stripping plate is located inside the slag removal ring. The outer edge of the material stripping plate is movably sealed to the inner wall of the slag removal ring.

[0009] Furthermore, the output shaft of the motor passes through the centrifugal disc and extends into the heating tube. The upper end of the output shaft of the motor is fixedly connected to a feeding auger, and the upper end of the feeding auger extends into the feeding hopper.

[0010] Furthermore, the lower wall of the oil receiving ring is a one-way inclined structure, an oil outlet nozzle is connected through the lowest point of the lower wall of the oil receiving ring, and a slag discharge hopper is connected through the bottom wall of the slag removal ring.

[0011] The beneficial effects achieved by the present invention are as follows: (1) The separator provided in the present invention centrifuges the oily sludge by means of a rotating centrifugal action. The airflow during the rotating motion causes the filter disc in the spin filter assembly to spin. The function of filtering and separating petroleum hydrocarbons is achieved solely through the rotating centrifugal action. Solid impurities can also be transferred and transported. The rotation of the filter cartridge can exchange the orientation of the filter holes, so that the filter holes in the filter cartridge can be automatically cleaned and prevented from being blocked under the action of centrifugal force, thereby continuously and efficiently filtering and separating the oily sludge. (2) When the filter hole is facing the side of the throw-in pipe, it directly receives the oily sludge and filters the petroleum hydrocarbons. At this time, the centrifugal force causes the petroleum hydrocarbons in the filter hole to move from the outside of the filter cartridge to the inside of the filter cartridge, and the filter hole filters the petroleum hydrocarbons. When the filter hole is facing the side of the throw-out pipe, it no longer receives the oily sludge. The centrifugal force causes the solid impurities in the filter hole to move from the inside of the filter cartridge to the outside of the filter cartridge. In this way, the filter hole can be cleared and blocked, so that the filter hole is in a through state again; (3) The impeller spins under the action of airflow, thereby driving the filter disc as a whole to rotate in the centrifugal sleeve. The partition drives the solid impurities in the oily sludge to move and reach the side of the discharge pipe; (4) The feed auger rotates in the feed hopper and can automatically transport the oily sludge downward to the heating pipe. The heating pipe can heat and decompose the sludge. Since the outer edge of the feed auger is movably fitted with the inner circumferential wall of the feed hopper, the oily sludge can block the feed auger at the connection between the feed hopper and the heating pipe during the transportation of the oily sludge, thereby forming a closed space in the heating pipe. The blocking effect of the oily sludge on the feed auger can improve the heating efficiency in the heating pipe. (5) The stripper plate moves in the slag removal ring following the slag removal ring. Since the outer edge of the stripper plate is in movable sealing contact with the inner wall of the slag removal ring, the stripper plate can efficiently scrape off the solid impurities in the slag removal ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic structural diagram of the integrated device for efficient separation and treatment of oilfield oily sludge proposed by the present invention; Figure 2 This is a schematic structural diagram of the integrated device for efficient separation and treatment of oilfield oily sludge proposed by the present invention after removing the separator; Figure 3 The structure of the separator in the present invention is shown as follows Figure 1 ; Figure 4 The structure of the separator in the present invention is shown as follows Figure 2 ; Figure 5 for Figure 3A partial enlarged view of part A in FIG; Figure 6 This is a front cross-sectional view of the integrated device for efficient separation and treatment of oilfield oily sludge proposed by the present invention; Figure 7 Schematic diagram of the structure of the filter disc in the present invention; Figure 8 Schematic diagram of the split structure of the filter disc and the oil outlet pipe in the present invention; Figure 9 This is a side sectional view of the integrated device for efficient separation and treatment of oilfield oily sludge proposed by the present invention; Figure 10 for Figure 9 A partial enlarged view of part B in FIG.

[0013] Among them, 1. base, 11. column, 12. oil ring, 121. oil nozzle, 13. support rod, 14. slag removal ring, 141. slag bucket, 15. connecting rod, 16. feed hopper, 2. motor, 21. feed auger, 3. separator, 4. centrifugal disc, 5. heating tube, 6. spin filter assembly, 61. throw-in pipe, 62. centrifugal sleeve, 63. throw-out pipe, 64. filter disc, 641. circular plate, 642. filter cartridge, 643. ring plate, 644. partition, 645. impeller, 646. filter hole, 65. oil outlet pipe, 651. oil retaining tile, 7. slag swivel, 71. material plate, 8. oil guide ring.

[0014] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention. DETAILED DESCRIPTION

[0015] Example 1: Please refer to Figures 1-10The present embodiment provides an integrated device for efficient separation and treatment of oil-containing sludge in an oil field, comprising a base 1, a motor 2 fixedly mounted on the base 1, and a separator 3 mounted on the output shaft of the motor 2. The base 1 is fixedly connected to an oil receiving ring 12 by a column 11. The lower wall of the oil receiving ring 12 is a one-way inclined structure. An oil outlet nozzle 121 is connected through the lowest point of the lower wall of the oil receiving ring 12. A slag removal ring 14 is fixedly connected to the oil receiving ring 12 through a support rod 13. A slag discharge hopper 141 is connected through the bottom wall of the slag removal ring 14. A connecting rod 15 arranged in a circular array is fixedly supported and connected to the slag removal ring 14. The feed hopper 16 is connected to the upper end of the separator 3. The separator 3 comprises a centrifugal disc 4, a heating tube 5, a spin filter assembly 6, a slag removal ring 7, and an oil guide ring 8. The centrifugal disc 4 is fixedly mounted on the motor 2. On the output shaft, the centrifugal disc 4 is hollow, the heating tube 5 is connected to the upper wall of the centrifugal disc 4, the upper end of the heating tube 5 is rotatably connected to the lower end of the feed hopper 16, and an electric heating wire is provided in the circumferential wall of the heating tube 5. The output shaft of the motor 2 passes through the centrifugal disc 4 and extends into the heating tube 5. The upper end of the output shaft of the motor 2 is fixedly connected to the feeding auger 21, and the upper end of the feeding auger 21 extends into the feed hopper 16, and the outer edge of the feeding auger 21 is movably fitted with the inner circumferential wall of the feed hopper 16. The spin-filtering components 6 are distributed in a ring array and are connected to the outer circumferential wall of the centrifugal disc 4. The slag-rejecting swivel 7 is fixedly connected to the outer end of all the spin-filtering components 6. The slag-rejecting swivel 7 is rotatably arranged in the slag removing ring 14. The oil guide ring 8 is fixedly connected to all the spin-filtering components 6, and the oil guide ring 8 is rotatably arranged in the oil receiving ring 12.

[0016] The spin filter assembly 6 includes a throw-in pipe 61, a centrifugal sleeve 62, a throw-out pipe 63, a filter disc 64 and an oil outlet pipe 65. The throw-in pipe 61 is fixedly connected to the outer circumference of the centrifugal disc 4. The centrifugal sleeve 62 is fixedly arranged at the outer end of the throw-in pipe 61. The throw-out pipe 63 is fixedly connected to the outer circumference of the centrifugal sleeve 62. The throw-in pipe 61, the centrifugal sleeve 62 and the throw-out pipe 63 are sequentially connected. The end of the throw-out pipe 63 away from the throw-in pipe 61 is fixedly passed through the slag swivel 7. The outer circumferential wall of the rotating ring 7 is fixedly provided with a ring array with a material stripping plate 71. The material stripping plate 71 is located on the side of the end of the ejection pipe 63, and the material stripping plate 71 is located inside the slag removal ring 14. The outer edge of the material stripping plate 71 is movably sealed in contact with the inner wall of the slag removal ring 14. The filter disc 64 is rotatably arranged on the inner wall of the centrifugal sleeve 62, and the oil outlet pipe 65 is fixedly arranged on the side wall of the centrifugal sleeve 62. One end of the oil outlet pipe 65 is rotatably connected to the filter disc 64, and the other end of the oil outlet pipe 65 is fixedly connected to the oil guide ring 8.

[0017] The filter disc 64 is composed of a circular plate 641, a filter cartridge 642, a ring plate 643, a partition plate 644 and an impeller 645. The circular plate 641 and the ring plate 643 are coaxially fixed to the two ends of the filter cartridge 642. The filter disc 64 is rotatably arranged in the centrifugal sleeve 62 through the circular plate 641 and the ring plate 643. The through-connection between the throwing-in pipe 61 and the centrifugal sleeve 62 and the through-connection between the throwing-out pipe 63 and the centrifugal sleeve 62 are both located between the circular plate 641 and the ring plate 643. The filter cartridge 642 is a hollow cylindrical structure. The circumferential wall of the filter cartridge 642 is arrayed with filter holes 646. The oil outlet pipe 65 is connected to the ring plate 643 for rotation and sealing, and the oil outlet pipe 65 is connected to the end of the filter cartridge 642 through the ring plate 643. The partitions 644 are distributed in a ring array and fixed on the outer circumferential wall of the filter cartridge 642. The two ends of the partition 644 are respectively fixedly connected to the side walls facing the circular plate 641 and the ring plate 643. The impeller 645 is coaxially fixedly connected to the outer wall of the circular plate 641. An oil retaining tile 651 is fixedly provided at the end of the oil outlet pipe 65. The oil retaining tile 651 is located on the side of the filter cartridge 642 away from the throwing-in tube 61. The inner arc wall surface of the oil retaining tile 651 is smoothly connected to the inner wall of the oil outlet pipe 65.

[0018] The working principle of this embodiment is as follows: the oily sludge is continuously conveyed to the feed hopper 16, and the motor 2 drives the separator 3 to rotate rapidly, thereby conveying the oily sludge to the centrifugal disk 4. During this process, the heating tube 5 heats and decomposes the oily sludge, and the oily sludge is thrown into the spin filter assembly 6 under the action of centrifugal force, and is blocked by the filter disk 64 for filtration and separation. The petroleum hydrocarbons in the oily sludge are thrown to the oil retaining tile 651 and fall into the oil receiving ring 12 through the oil outlet pipe 65, and then flow out from the oil outlet nozzle 121. When the separator 3 rotates rapidly, the impeller 645 spins under the action of the airflow, causing the filter disk 64 to rotate as a whole. The filter disk 64 conveys the solid impurities in the oily sludge to the ejection pipe 63 and enters the slag removal ring 14. The material stripping plate 71 pushes the solid impurities to the slag discharge hopper 141, and the solid impurities are discharged from the slag discharge hopper 141.

[0019] The specific usage process of this embodiment is as follows: The operator uses a conveying device to continuously convey the oily sludge into the feed hopper 16, starts the motor 2, and the output shaft of the motor 2 drives the separator 3 to rotate rapidly as a whole. When the separator 3 rotates, the feed auger 21 rotates in the feed hopper 16, the slag removal ring 7 rotates in the slag removal ring 14, and the oil guide ring 8 rotates in the oil receiving ring 12.

[0020] The feeding auger 21 transports the oily sludge downward into the heating tube 5. The high temperature generated by the heating wire in the heating tube 5 heats and decomposes the sludge. Since the outer edge of the feeding auger 21 is movably fitted with the inner circumferential wall of the feed hopper 16, during the process of transporting the oily sludge, the oily sludge can block the feeding auger 21 at the connection between the feed hopper 16 and the heating tube 5, thereby forming a closed space in the heating tube 5. The blocking effect of the oily sludge on the feeding auger 21 can improve the heating efficiency in the heating tube 5.

[0021] After heating, the oily sludge is thermally decomposed, and the petroleum hydrocarbons and solid impurities therein are preliminarily separated, and then fall into the centrifugal disk 4. The rotation of the centrifugal disk 4 causes the oily sludge to be thrown into each spin filter assembly 6. The oily sludge enters the centrifugal sleeve 62 from the throwing-in pipe 61 and is blocked by the filter cartridge 642. The petroleum hydrocarbons in the oily sludge enter the interior of the filter cartridge 642 from the filter holes 646 on the circumferential wall of the filter cartridge 642 and are thrown onto the oil retaining tile 651. Then, they pass through the oil outlet pipe 65 and fall into the oil receiving ring 12, and finally flow out from the oil outlet nozzle 121. The operator places a container under the oil outlet nozzle 121 to receive the separated petroleum hydrocarbons.

[0022] The separator 3 rotates with all the spin-filter components 6, and the impeller 645 spins due to the action of the airflow, thereby driving the filter disc 64 to rotate as a whole in the centrifugal sleeve 62. The partition 644 drives the solid impurities in the oily sludge to move and reach the side of the discharge pipe 63. Under the action of centrifugal force, the solid impurities are thrown into the slag removal ring 14, and the material stripping plate 71 follows the movement of the slag removal ring 7. The material stripping plate 71 moves in the slag removal ring 14, so that the solid impurities therein can be pushed and scraped until they are pushed to the slag discharge bucket 141. The solid impurities fall under the action of gravity and are discharged from the slag discharge bucket 141. The operator places a container under the slag discharge bucket 141 to receive the separated solid impurities.

[0023] During the rotation of the filter disc 64, the filter cartridge 642 will also rotate, so that the direction of the centrifugal force on the filter hole 646 on the filter cartridge 642 can be changed. When the filter hole 646 is toward the side of the throw-in pipe 61, it directly bears the oily sludge and filters the petroleum hydrocarbons. At this time, the centrifugal force causes the petroleum hydrocarbons in the filter hole 646 to move from the outside of the filter cartridge 642 to the inside of the filter cartridge 642. Some solid impurities will also enter the filter hole 646 and block the filter hole 646. When the filter hole 646 is toward the side of the throw-out pipe 63, it no longer bears the oily sludge. The centrifugal force The effect makes the movement path of the solid impurities in the filter hole 646 from the inside of the filter cartridge 642 to the outside of the filter cartridge 642, so that the filter hole 646 can be cleared and blocked, so that the filter hole 646 is in a through state again. The centrifugal action generated by the rotational movement of the spin filter assembly 6 can not only centrifugally separate petroleum hydrocarbons, but also transfer and transport solid impurities, and make the filter cartridge 642 rotate, exchanging the direction of the filter hole 646, so that the filter hole 646 in the filter cartridge 642 can be automatically cleaned and prevented from blocking under the action of centrifugal force, thereby continuously and efficiently filtering and separating the oily sludge.

[0024] The present invention and its embodiments are described above. Such description is not restrictive. What is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto.

Claims

1. An integrated device for efficient separation and treatment of oily sludge in an oil field, comprising a base (1) and a motor (2) fixedly mounted on the base (1), characterized in that: The invention also includes a separator (3) arranged on the output shaft of the motor (2), the separator (3) including a centrifugal disc (4) and a spin filter assembly (6), the centrifugal disc (4) being fixedly arranged on the output shaft of the motor (2), the spin filter assembly (6) being distributed in an annular array and connected to the outer circumferential wall of the centrifugal disc (4), the spin filter assembly (6) including a throw-in pipe (61), a centrifugal sleeve (62), a throw-out pipe (63), a filter disc (64) and an oil outlet pipe (65), the throw-in pipe (61) passing through the outer circumference of the centrifugal disc (4), and the oil outlet pipe (65). The centrifugal sleeve (62) is fixedly connected to the outer circumferential wall of the centrifugal disc (4), the centrifugal sleeve (62) is fixedly arranged at the outer end of the throw-in pipe (61), the throw-out pipe (63) is fixedly connected to the outer circumferential wall of the centrifugal sleeve (62), the throw-in pipe (61), the centrifugal sleeve (62) and the throw-out pipe (63) are sequentially arranged through, the filter disc (64) is rotatably arranged on the inner wall of the centrifugal sleeve (62), the oil outlet pipe (65) is fixedly arranged on the side wall of the centrifugal sleeve (62), and one end of the oil outlet pipe (65) is rotatably connected to the filter disc (64).

2. The integrated device for efficient separation and treatment of oilfield oily sludge according to claim 1 is characterized in that: The filter disc (64) is composed of a circular plate (641), a filter cartridge (642), a ring plate (643), a partition plate (644) and an impeller (645). The circular plate (641) and the ring plate (643) are coaxially fixedly connected to the two ends of the filter cartridge (642). The filter disc (64) is rotatably arranged in the centrifugal sleeve (62) through the circular plate (641) and the ring plate (643). The oil outlet pipe (65) is connected to the ring plate (643) in a rotary sealing manner. The partition plates (644) are distributed in an annular array and fixedly arranged on the outer circumferential wall of the filter cartridge (642). The two ends of the partition plates (644) are fixedly connected to the side walls of the circular plate (641) and the ring plate (643) facing each other. The impeller (645) is coaxially fixedly connected to the outer wall of the circular plate (641).

3. The integrated device for efficient separation and treatment of oilfield oily sludge according to claim 2, characterized in that: The filter cartridge (642) is a hollow cylindrical structure. The filter cartridge (642) is provided with filter holes (646) in an array on its circumferential wall. An oil retaining tile (651) is fixedly provided at the end of the oil outlet pipe (65). The oil retaining tile (651) is located inside the filter cartridge (642) on a side away from the throwing-in pipe (61).

4. The integrated device for efficient separation and treatment of oilfield oily sludge according to claim 1 is characterized in that: The separator (3) further comprises a slag-sweeping swivel (7) and an oil guide ring (8). The slag-sweeping swivel (7) is fixedly connected to the outlet pipes (63) in all the spin-filter assemblies (6), and the oil guide ring (8) is fixedly connected to the oil outlet pipes (65) in all the spin-filter assemblies (6).

5. The integrated device for efficient separation and treatment of oilfield oily sludge according to claim 1 is characterized in that: An oil receiving ring (12) is fixedly provided on the base (1), a slag removal ring (14) is fixedly provided on the oil receiving ring (12), an oil guide ring (8) is rotatably provided in the oil receiving ring (12), and a slag removal rotating ring (7) is rotatably provided in the slag removal ring (14).

6. The integrated device for efficient separation and treatment of oilfield oily sludge according to claim 1, characterized in that: One end of the ejection pipe (63) away from the ejection pipe (61) passes through the slag ejection swivel (7), and a ring array of material-dispensing plates (71) are fixedly provided on the outer circumferential wall of the slag ejection swivel (7). The material-dispensing plates (71) are located inside the slag removal ring (14), and the outer edge of the material-dispensing plates (71) is movably sealed and fitted with the inner wall of the slag removal ring (14).

7. The integrated device for efficient separation and treatment of oilfield oily sludge according to claim 1 is characterized in that: The upper end of the output shaft of the motor (2) is fixedly connected to a feed auger (21), and the upper end of the feed auger (21) extends into the feed hopper (16).

8. The integrated device for efficient separation and treatment of oilfield oily sludge according to claim 1 is characterized in that: The lower wall of the oil receiving ring (12) is connected to an oil outlet nozzle (121), and the bottom wall of the slag removal ring (14) is connected to a slag discharge bucket (141).

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