Conveying device for harmless treatment of oily sludge

Abstract

The invention relates to the technical field of oil sludge treatment, in particular to an oily sludge harmless treatment conveying device which comprises an oil sludge buffer hopper, an oil sludge feeding scraper conveyor and an oil sludge embedded scraper conveyor. A flow guide hopper is fixed to the upper portion in the oil sludge buffer hopper, a conveying rail is fixed to the lower portion of the flow guide hopper, and a conveying hose is laid in the conveying rail; the top end of the conveying hose is connected with a discharging port in the bottom end of the flow guide hopper, a transverse pipe is further fixed below the flow guide hopper, a rotating cylinder is coaxially and rotationally installed on the transverse pipe, a plurality of extrusion bodies are fixed to the outer surface of the rotating cylinder in the circumferential direction, and the movement paths of the extrusion bodies correspond to the conveying track. And the rotating drum drives the extruding body to intermittently extrude the conveying hose in the conveying track. By arranging the conveying device composed of the oil sludge buffer hopper, the oil sludge feeding scraper conveyor and the oil sludge embedded scraper conveyor, closed conveying of the oil sludge can be achieved through the two scraper conveyors, odor overflow is reduced, scattered materials are few, and the conveying effect is better.

Description

Technical Field

[0001] The invention relates to the technical field of oily sludge treatment, and in particular to a conveying device for harmless treatment of oily sludge. Background Art

[0002] In the process of harmless treatment of oil sludge, a conveying device is required to transport the oil sludge to a complete set of thermal phase separation equipment for treatment. Among them, the existing technology for conveying oil sludge currently mainly adopts a belt conveyor. The biggest problem of this equipment is that it is not closed, there is odor leakage, and oil sludge is scattered all over the ground. At the same time, the oil sludge stuck to the belt conveyor must be manually cleaned regularly. Summary of the invention

[0003] The purpose of the present invention is to solve the shortcomings of the prior art that the oil sludge is not closed, there is odor leakage, and oil sludge is scattered all over the ground. At the same time, the oil sludge adhering to the belt conveyor must be cleaned manually at regular intervals, and a conveying device for harmless treatment of oily sludge is proposed.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] A conveying device for harmless treatment of oily sludge is designed, comprising an oily sludge buffer hopper, an oily sludge feeding scraper conveyor, and an oily sludge buried scraper conveyor. The oily sludge buffer hopper is equipped with an oily sludge feeding scraper conveyor, and the oily sludge buried scraper conveyor is installed below the oily sludge feeding scraper conveyor. A guide bucket is fixed on the upper part of the oily sludge buffer hopper, and a conveying track is fixed below the guide bucket. The conveying track is arc-shaped, and a conveying hose is laid in the conveying track. The top of the conveying hose is connected to the discharge port at the bottom end of the guide bucket. A cross pipe is also fixed below the guide bucket, and the cross pipe is coaxially distributed with the conveying track. A rotating drum is coaxially mounted on the cross pipe, and a plurality of extrusion bodies are fixed on the outer surface of the rotating drum along the circumferential direction. The movement path of the extrusion body corresponds to the conveying track, so that the rotating drum drives the extrusion body to intermittently extrude the conveying hose in the conveying track.

[0006] Preferably, the inner wall of the conveying hose is covered with a filter screen on one side close to the conveying track, and a plurality of water-permeable holes are provided through the conveying hose and the conveying track corresponding to the filter screen;

[0007] An air filling box is arranged between every two of the extrusion bodies. The air filling box is fixedly connected to the rotating drum. The air filling box is opened toward the conveying track. The opening of the air filling box is covered and fixed with an elastic film. The air filling boxes are all connected to the inflation and deflation module.

[0008] Preferably, a drainage box is fixed in the sludge buffer hopper below the water permeable hole, and the bottom of the drainage box is connected to a wastewater treatment device through a drainage pipe.

[0009] Preferably, the inflation and deflation module comprises a hollow tube, a partition, an air guide hole, an air pumping cavity, and an air outlet cavity. The outer surface of the rotating cylinder is provided with air guide holes along the circumferential direction. The air guide holes are arranged in a one-to-one correspondence with the inflation boxes, and the corresponding inflation boxes are connected to the air guide holes through the hollow tubes; both ends of the transverse tube are sealed, and a partition is fixed inside the transverse tube, and the partition is used to separate the transverse tube into an air pumping cavity and an air outlet cavity. The air pumping cavity is arranged close to one side of the conveying track, and the air pumping cavity is connected to an air pumping device, and the air pumping device is used to input high-pressure gas into the air pumping cavity. An air pumping port is arranged on the inner wall of the air pumping cavity close to the conveying track, and an air outlet is arranged on the inner wall of the air outlet cavity;

[0010] Preferably, an outer cylinder is fixed just below the bottom end of the delivery hose, an inner cylinder is coaxially rotatably mounted in the outer cylinder, and a crushing blade is coaxially fixed in the inner cylinder;

[0011] An annular inner cavity is coaxially opened in the inner cylinder, and a plurality of oblique exhaust holes are circumferentially opened in the inner cylinder. The inner ends of the oblique exhaust holes are connected to the annular inner cavity, and the outer ends of the oblique exhaust holes are connected to the outside. An annular air guide cavity is coaxially opened in the outer cylinder, and the annular air guide cavity is connected to the annular inner cavity. The air outlet cavity is connected to the annular air guide cavity through an air guide pipe.

[0012] Preferably, the cross section of the conveying track is semicircular.

[0013] Preferably, the extruded body is spherical, and the surface of the extruded body is polished.

[0014] Preferably, the delivery hose is an ultra-high wear-resistant polyurethane delivery hose.

[0015] The invention provides a conveying device for harmless treatment of oily sludge, which has the following beneficial effects:

[0016] By providing a conveying device consisting of an oil sludge buffer hopper, an oil sludge feeding scraper conveyor, and an oil sludge buried scraper conveyor, two sets of scraper conveyors can be used to achieve closed conveying of oil sludge, reduce odor overflow, and reduce material spillage. Compared with the belt conveyor method, the burden of manual cleaning is small and the conveying effect is better;

[0017] By arranging a structure composed of a conveying hose, a conveying track, an extrusion body, etc. in the sludge buffer hopper, multiple extrusion bodies can be used to intermittently discharge the sludge in the conveying hose, thereby realizing the control of the weight and volume of the sludge entering the sludge feeding scraper conveyor, and avoiding too much sludge falling into it at one time, and being firmly adsorbed on the inner wall of the conveyor under the action of gravity, causing the operation of the sludge feeding scraper conveyor to be blocked;

[0018] An air filling box is also provided between the two extrusion bodies. When the elastic membrane on the air filling box between the two extrusion bodies expands, the expanded elastic membrane will squeeze the conveying hose toward the conveying track side, so that the sludge in the conveying hose between the two extrusion bodies is squeezed and the moisture in the sludge is squeezed out. The squeezed moisture passes through the filter net on the inner wall of the conveying hose and then flows out through the water permeable holes on the conveying hose and the conveying track, thereby reducing the moisture content of the sludge. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of the structure of a conveying device for harmless treatment of oily sludge proposed by the present invention Figure 1 ;

[0020] Figure 2 A schematic diagram of the structure of a conveying device for harmless treatment of oily sludge proposed by the present invention Figure 2 ;

[0021] Figure 3 A schematic diagram of the internal structure of an oily sludge buffer hopper of a conveying device for harmless treatment of oily sludge proposed by the present invention;

[0022] Figure 4 Schematic diagram of the internal component structure of the oily sludge buffer hopper of a conveying device for harmless treatment of oily sludge proposed by the present invention Figure 1 ;

[0023] Figure 5 Schematic diagram of the internal component structure of the oily sludge buffer hopper of a conveying device for harmless treatment of oily sludge proposed by the present invention Figure 2 ;

[0024] Figure 6 A schematic diagram of the rotary drum structure of a conveying device for harmless treatment of oily sludge proposed by the present invention;

[0025] Figure 7 This is a schematic diagram of the cross-sectional structure of the rotating drum and the horizontal drum of a conveying device for harmless treatment of oily sludge proposed by the present invention;

[0026] Figure 8 A schematic diagram of the conveying track and conveying hose structure of a conveying device for harmless treatment of oily sludge proposed by the present invention;

[0027] Fig. 9 A schematic diagram of the cross-sectional structure of a conveying track and a conveying hose of a conveying device for harmless treatment of oily sludge proposed by the present invention;

[0028] Fig.10 for Fig. 9 Schematic diagram of the local structure at A;

[0029] Fig.11A schematic diagram of the extrusion state of an extrusion body and a conveying hose in a conveying track of a conveying device for harmless treatment of oily sludge proposed by the present invention;

[0030] Fig.12 This is a schematic diagram of the position structure of the air guide pipe of a conveying device for harmless treatment of oily sludge proposed by the present invention;

[0031] Fig.13 Schematic diagram of the drum structure of a conveying device for harmless treatment of oily sludge proposed by the present invention Figure 1 ;

[0032] Fig.14 This is a schematic diagram of the oblique exhaust hole structure of a conveying device for harmless treatment of oily sludge proposed by the present invention.

[0033] In the figure: 1. grab bucket; 2. sludge buffer hopper; 3. sludge feeding scraper conveyor; 4. sludge buried scraper conveyor; 5. guide bucket; 6. discharge port; 7. conveying track; 8. conveying hose; 9. cross pipe; 10. rotating drum; 11. fixed rod; 12. extrusion body; 13. partition; 14. air pumping chamber; 15. air outlet chamber; 16. air pumping port; 17. air outlet; 18. hollow tube; 19. inflation box; 20. elastic membrane; 21. filter screen; 22. water permeable hole; 23. air guide pipe; 24. outer cylinder; 25. inner cylinder; 26. crushing blade; 27. annular inner cavity; 28. oblique exhaust hole; 29. ​​annular air guide cavity; 30. drainage box; 33. motor; 32. complete set of thermal phase separation equipment. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0035] Example 1: Reference Figure 1-68-11, a conveying device for harmless treatment of oily sludge, comprising an oily sludge buffer hopper 2, an oily sludge feeding scraper conveyor 3, and an oily sludge buried scraper conveyor 4, the oily sludge buffer hopper 2 is provided with an oily sludge feeding scraper conveyor 3, the oily sludge buried scraper conveyor 4 is provided with an oily sludge feeding scraper conveyor 3, a guide bucket 5 is fixed to the upper part of the oily sludge buffer hopper 2, a conveying track 7 is fixed to the lower part of the guide bucket 5, the conveying track 7 is in an arc shape, a conveying hose 8 is laid in the conveying track 7, the top end of the conveying hose 8 is connected to the discharge port 6 at the bottom end of the guide bucket 5 Next, a transverse pipe 9 is fixed below the guide bucket 5. The transverse pipe 9 is coaxially distributed with the conveying track 7. A rotating drum 10 is coaxially installed on the transverse pipe 9. The rotating drum 10 is connected to a motor in a transmission manner. A plurality of extrusion bodies 12 are fixed to the outer surface of the rotating drum 10 along the circumferential direction. The extrusion bodies 12 are fixedly connected to the rotating drum 10 by a fixing rod 11. The movement path of the extrusion bodies 12 corresponds to the conveying track 7. The motor is used to drive the rotating drum 10 to drive the extrusion bodies 12 to make circular motions, so that the rotating drum 10 drives the extrusion bodies 12 to intermittently squeeze the conveying hose 8 in the conveying track 7. By using the extrusion bodies 12 to intermittently squeeze the sludge in the conveying hose 8, the sludge in the sludge buffer hopper 2 can intermittently fall into the sludge scraper conveyor, thereby achieving a buffering effect and avoiding the situation where the sludge scraper conveyor cannot operate normally due to excessive sludge falling. The conveying track 7 of the present invention can be arranged in multiples, and the corresponding structures can also be arranged in small numbers, thereby increasing the sludge feeding speed.

[0036] A vibrating feeding motor may be fixed on the outer wall of the oil sludge buffer hopper 2 to accelerate the downward flow speed of the oil sludge in the hopper 2 .

[0037] The inner wall of the delivery hose 8 is covered with a filter screen 21 on one side close to the delivery track 7, and a plurality of water-permeable holes 22 are formed through the delivery hose 8 and the delivery track 7 corresponding to the filter screen 21;

[0038] An air filling box 19 is arranged between every two extrusion bodies 12. The air filling box 19 is fixedly connected to the rotating drum 10. The air filling box 19 is opened on the side facing the conveying track 7. The opening of the air filling box 19 is covered and fixed with an elastic membrane 20. The air filling box 19 is connected to the inflation and deflation module.

[0039] When every two extrusion bodies 12 squeeze the sludge in the conveying hose 8 downward, the air box 19 will be filled with a body, causing the elastic membrane 20 to expand, and then the conveying hose 8 between the two extrusion bodies 12 is squeezed to squeeze out the moisture in the sludge. The squeezed moisture passes through the filter screen 21 and flows out through the water permeable hole 22, and finally falls into the drainage box 30, and finally discharged into the wastewater treatment device. This can further reduce the moisture content in the sludge, reduce the viscosity of the sludge, and make the conveyor more convenient to transport.

[0040] A drainage box 30 is fixed in the sludge buffer hopper 2 below the water permeable hole 22, and a wastewater treatment device is connected to the bottom of the drainage box 30 through a drainage pipe.

[0041] The cross section of the conveying track 7 is semicircular.

[0042] The extruded body 12 is spherical, and the surface of the extruded body 12 is polished.

[0043] The delivery hose 8 is a super wear-resistant polyurethane delivery hose 8. The semicircular delivery track 7 is more consistent with the delivery hose 8. Under the extrusion of the spherical extrusion body 12, the sludge in the delivery hose 8 can be better squeezed out. The polished extrusion body 12 surface is smoother, so that the friction resistance between the extrusion body 12 and the delivery hose 8 is greatly reduced, and the wear of the delivery hose 8 is greatly reduced.

[0044] Example 2: Reference Figure 7 , 12 -14, as another preferred embodiment of the present invention, is different from Embodiment 1 in that the inflation and deflation module comprises a hollow tube 18, a partition 13, an air guide hole, an air pumping cavity 14, and an air outlet cavity 15. The outer surface of the rotating drum 10 is provided with air guide holes along the circumferential direction. The air guide holes are arranged one by one with the air charging boxes 19. The corresponding air charging boxes 19 are connected with the air guide holes through the hollow tube 18. The two ends of the transverse tube 9 are sealed. A partition 13 is fixed inside the transverse tube 9. The partition 13 is used to separate the transverse tube 9 into an air pumping cavity 14 and an air outlet cavity 15. The air pumping cavity 14 is arranged near the side of the conveying track 7. The air pumping cavity 14 is connected with an air pumping device. The air pumping device is used to input high-pressure gas into the air pumping cavity 14. An air pumping port 16 is arranged on the inner wall of the air pumping cavity 14 near the side of the conveying track 7. An air outlet 17 is arranged on the inner wall of the air outlet cavity 15.

[0045] The inflation and deflation module integrates the entire inflation and deflation structure with the rotating drum 10 and the transverse tube 9, so that during the rotation of the rotating drum 10, the air guide holes on the rotating drum 10 can be connected with the inflation chamber 14 and the air outlet chamber 15 in the transverse tube 9 in turn, and then the inflation and deflation of the inflation box 19 can be achieved through the hollow tube 18 connected to the air guide holes. In this way, when the inflation box 19 passes through the conveying track 7, it will automatically inflate, so that the elastic membrane 20 thereon can expand to squeeze the conveying hose 8, and when passing over the conveying track 7, the gas inside it will automatically be discharged into the air outlet chamber 15.

[0046] An outer cylinder 24 is fixed just below the bottom end of the delivery hose 8, an inner cylinder 25 is coaxially mounted in the outer cylinder 24, and a crushing blade 26 is coaxially fixed in the inner cylinder 25;

[0047] An annular inner cavity 27 is coaxially opened in the inner cylinder 25, and a plurality of oblique exhaust holes 28 are circumferentially opened in the inner cylinder 25. The inner ends of the oblique exhaust holes 28 are connected to the annular inner cavity 27, and the outer ends of the oblique exhaust holes 28 are connected to the outside. An annular air guide cavity 29 is coaxially opened in the outer cylinder 24, and the annular air guide cavity 29 is connected to the annular inner cavity 27. The air outlet cavity 15 and the annular air guide cavity 29 are connected via an air guide pipe 23.

[0048] The above structure inputs the gas discharged from the air outlet cavity 15 into the annular air guide cavity 29 through the air guide pipe 23, and then introduces it into the annular inner cavity 27 through the annular air guide cavity 29, and finally discharges it through a plurality of oblique exhaust holes 28 connected to the annular inner cavity 27. Due to the oblique reaction force generated by the gas discharged from the oblique exhaust holes 28, the outer cylinder 24 rotates, and then the outer cylinder 24 drives the crushing blades 26 inside it to rotate. In this way, when the sludge at the end of the conveying hose 8 falls into the inner cylinder 25, the crushing blades 26 can disperse the sludge, so that the sludge falls in a dispersed state, thereby preventing the sludge from falling in large pieces, which leads to an increase in the viscosity of the conveyor.

[0049] The overall workflow of the present invention is as follows:

[0050] In actual use, as shown in the attached Figure 1 As shown, a grab bucket 1 is arranged above the whole device, and the grab bucket 1 grabs a small amount of sludge on one side and puts it into the sludge buffer hopper 2; the sludge entering the sludge buffer hopper 2 will flow into the conveying hose 8 below under the guidance of the guide bucket 5, and the motor is started at this time, and the motor drives the rotating drum 10 to rotate, and the rotating drum 10 drives multiple extrusion bodies 12 to make circular motions. Whenever a group of extrusion bodies 12 moves to the conveying track 7, the two extrusion bodies 12 will separate the conveying hose 8 in the conveying track 7 into a separate section, and the sludge in this section will also follow the two extrusion bodies 12 to flow downward along the conveying hose 8, and finally be discharged through the bottom end of the conveying hose 8. In this way, the rotation speed of the rotating drum 10 can be controlled to allow multiple extrusion bodies 12 to intermittently discharge the sludge in the conveying hose 8, thereby realizing the control of the weight and volume of the sludge entering the sludge feeding scraper conveyor 3, and avoiding too much sludge falling into it at one time. Under the action of gravity, it is firmly adsorbed on the inner wall of the conveyor, causing the sludge feeding scraper conveyor 3 to be blocked;

[0051] In the above process, when the drum 10 rotates, whenever the air guide hole between the two extrusion bodies 12 is connected with the air inlet 16 of the air inflating chamber 14 in the transverse tube 9, the high-pressure gas in the air inflating chamber 14 will enter the air charging box 19 through the air guide hole and the hollow tube 18, so that the elastic membrane 20 on the air charging box 19 between the two extrusion bodies 12 will expand, and the expanded elastic membrane 20 will squeeze the conveying hose 8 toward the conveying track 7 side, so that the sludge in the conveying hose 8 between the two extrusion bodies 12 is squeezed, and the moisture in the sludge is squeezed out. After the squeezed moisture passes through the filter screen 21 on the inner wall of the conveying hose 8, it flows out through the water permeable holes 22 on the conveying hose 8 and the conveying track 7, and finally falls into the drainage box 30. In this way, in the process of controlling the falling speed of the sludge, the moisture content of the sludge can also be reduced synchronously, making the conveyor more convenient to transport;

[0052] In the above process, whenever the air guide hole between the two extrusion bodies 12 is connected with the air outlet 17 of the air outlet cavity in the cross tube 9, the high-pressure gas in the inflation box 19 will be discharged into the air outlet cavity 15. At this time, the air guide pipe 23 will input the high-pressure gas discharged from the air outlet cavity 15 into the annular air guide cavity 29, and then introduce it into the annular inner cavity 27 through the annular air guide cavity 29, and finally discharge it through a plurality of oblique exhaust holes 28 connected to the annular inner cavity 27. Due to the oblique reaction force generated by the gas discharged from the oblique exhaust holes 28, the outer cylinder 24 rotates, and then the outer cylinder 24 drives the crushing blades 26 inside it to rotate. In this way, when the sludge at the end of the conveying hose 8 falls into the inner cylinder 25, the crushing blades 26 can disperse the sludge, so that the sludge falls in a dispersed state, avoiding the sludge from falling in large pieces and excessively adhering to the inner wall of the conveyor under the action of gravity, thereby further reducing the resistance encountered during the operation of the conveyor.

[0053] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A conveying device for harmless treatment of oily sludge, comprising an oily sludge buffer hopper (2), an oily sludge feeding scraper conveyor (3), and an oily sludge buried scraper conveyor (4), characterized in that: An oil sludge feeding scraper conveyor (3) is installed below the oil sludge buffer hopper (2), and an oil sludge buried scraper conveyor (4) is installed below the oil sludge feeding scraper conveyor (3). A guide bucket (5) is fixed to the upper part of the oil sludge buffer hopper (2), and a conveying track (7) is fixed below the guide bucket (5). The conveying track (7) is in an arc shape, and a conveying hose (8) is laid in the conveying track (7). The top end of the conveying hose (8) is connected to the discharge port ( 6), a transverse pipe (9) is fixed below the guide bucket (5), the transverse pipe (9) is coaxially distributed with the conveying track (7), a rotating drum (10) is coaxially rotatably mounted on the transverse pipe (9), a plurality of extrusion bodies (12) are fixed on the outer surface of the rotating drum (10) along the circumferential direction, and the movement path of the extrusion bodies (12) corresponds to the conveying track (7), so that the rotating drum (10) drives the extrusion bodies (12) to intermittently extrude the conveying hose (8) in the conveying track (7).

2. The conveying device for harmless treatment of oily sludge according to claim 1 is characterized in that: The inner wall of the conveying hose (8) is covered with a filter screen (21) on the side close to the conveying track (7), and a plurality of water-permeable holes (22) are provided through the conveying hose (8) and the conveying track (7) corresponding to the filter screen (21); An air filling box (19) is arranged between every two of the extrusion bodies (12). The air filling box (19) is fixedly connected to the rotating drum (10). The air filling box (19) is opened on the side facing the conveying track (7). The opening of the air filling box (19) is covered and fixed with an elastic film (20). The air filling boxes (19) are all connected to the inflation and deflation modules.

3. The conveying device for harmless treatment of oily sludge according to claim 2, characterized in that: A drainage box (30) is fixed in the sludge buffer hopper (2) below the water permeable hole (22), and the bottom of the drainage box (30) is connected to a wastewater treatment device via a drainage pipe.

4. The conveying device for harmless treatment of oily sludge according to claim 2, characterized in that: The inflation and deflation module comprises a hollow tube (18), a partition (13), an air guide hole, an air pumping cavity (14), and an air outlet cavity (15); the outer surface of the rotating drum (10) is provided with air guide holes along the circumferential direction; the air guide holes are arranged in a one-to-one correspondence with the inflation boxes (19); the corresponding inflation boxes (19) and the air guide holes are connected through the hollow tube (18); the two ends of the transverse tube (9) are sealed; a partition (13) is fixed inside the transverse tube (9); the partition (13) is used to separate the horizontal tube (9) into an air-inflating chamber (14) and an air outlet chamber (15), wherein the air-inflating chamber (14) is arranged close to one side of the conveying track (7), and the air-inflating chamber (14) is connected to an air-inflating device, and the air-inflating device is used to input high-pressure gas into the air-inflating chamber (14). An air-inflating port (16) is provided through the inner wall of the air-inflating chamber (14) close to one side of the conveying track (7), and an air outlet port (17) is provided on the inner wall of the air outlet chamber (15).

5. The conveying device for harmless treatment of oily sludge according to claim 4, characterized in that: An outer cylinder (24) is fixed just below the bottom end of the delivery hose (8), an inner cylinder (25) is coaxially rotatably mounted inside the outer cylinder (24), and a crushing blade (26) is coaxially fixed inside the inner cylinder (25); An annular inner cavity (27) is coaxially formed in the inner cylinder (25), and a plurality of oblique exhaust holes (28) are circumferentially formed in the inner cylinder (25), the inner ends of the oblique exhaust holes (28) are in communication with the annular inner cavity (27), and the oblique exhaust holes (28) are in communication with the outside. An annular air guide cavity (29) is coaxially formed in the outer cylinder (24), and the annular air guide cavity (29) is in communication with the annular inner cavity (27), and the air outlet cavity (15) and the annular air guide cavity (29) are in communication via an air guide pipe (23).

6. The conveying device for harmless treatment of oily sludge according to claim 1, characterized in that: The cross section of the conveying track (7) is semicircular.

7. The conveying device for harmless treatment of oily sludge according to claim 1, characterized in that: The extruded body (12) is spherical in shape, and the surface of the extruded body (12) is polished.

8. The conveying device for harmless treatment of oily sludge according to claim 1, characterized in that: The delivery hose (8) is an ultra-high wear-resistant polyurethane delivery hose (8).

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