Oil pressing device and method capable of removing crude oil powder residue

Abstract

The present invention discloses an oil pressing device and method capable of removing crude oil powder residue, aiming to solve the problems of long operation time and low efficiency of removing residue from crude oil obtained by pressing. The invention comprises a screw press and a crude oil remover. The crude oil remover comprises a centrifugal filter unit and a centrifugal sedimentation unit. The centrifugal filter unit comprises a fixed cylinder and a centrifugal cylinder. The centrifugal cylinder is rotatably mounted in the fixed cylinder. A plurality of oil outlet holes are densely distributed on the lower side wall of the centrifugal cylinder. The fixed cylinder is connected to an oil pump. The centrifugal sedimentation unit comprises a rotating shaft and a centrifugal pipe. The centrifugal pipe comprises a straight section and a frustum section. A spiral blade is mounted on the rotating shaft. The outer edge of the spiral blade is adapted to the inner wall of the centrifugal pipe. An oil inlet hole is provided at a position corresponding to the straight section in the rotating shaft. One end of the oil inlet hole is connected to the oil outlet end of the oil pump. The other end of the oil inlet hole is connected to a position on the outer wall of the rotating shaft that is biased towards the frustum section. A slag outlet hole is provided at the end of the frustum section away from the straight section. An oil outlet hole is provided at the end of the straight section away from the frustum section.

Description

Technical Field

[0001] The present invention relates to an oil pressing technology, and more particularly to an oil pressing device and method capable of removing crude oil powder residue. Background Art

[0002] Currently, crude oil extracted from woody oilseeds often contains residual residue. To improve the quality of crude oil, this residue must be removed. Common methods include settling and filtration. Settling takes a long time and is inefficient, while filtration can speed up the process but is less effective at removing the residue.

[0003] Chinese patent application No. 201711054828.5 discloses a crude oil filtration device and filtration method. The crude oil filtration device includes a filter body and a solution tank. During the crude oil filtration operation, a solution is poured into the solution tank, and the crude oil is poured into the filter body. A flow control valve proportionally controls the volume of solution in the solution tank flowing into the filter body based on the crude oil level detected by a liquid level meter. The mixture of the solution and crude oil is stirred and heated within the filter body. After standing and stratifying, the oil residue is removed to obtain clean oil. This method of removing oil residue by settling is time-consuming and inefficient. Summary of the Invention

[0004] In order to overcome the above-mentioned shortcomings, the present invention provides an oil pressing device and method capable of removing crude oil powder residue, which has good separation and removal effect of powder residue in crude oil and high working efficiency.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions: an oil pressing device capable of removing crude oil powder residue, comprising a screw press and a crude oil deslagging machine, wherein the screw press is provided with an oil receiving pan, and the oil receiving pan is provided with an oil outlet; the crude oil deslagging machine comprises a centrifugal filter unit and a centrifugal sedimentation unit, the centrifugal filter unit comprises a fixed cylinder and a centrifugal cylinder, the centrifugal cylinder is rotatably installed in the fixed cylinder, the upper end opening of the centrifugal cylinder is arranged toward the oil outlet, a plurality of oil outlet pores are densely distributed on the side wall of the lower part of the centrifugal cylinder, an oil storage ring cavity is formed between the outer wall of the centrifugal cylinder and the inner wall of the fixed cylinder, the bottom of the oil storage ring cavity is connected to the oil delivery pipe, and the oil delivery pipe Connected to the oil pump; the centrifugal sedimentation unit includes a rotating shaft and a horizontally arranged centrifugal pipe. The rotating shaft is plug-connected to the centrifugal pipe. The centrifugal pipe includes a straight section and a frustum section. The inner diameter of the frustum section gradually decreases from the end connected to the straight section to the other end. A spiral blade is installed on the rotating shaft. The outer edge of the spiral blade is adapted to the inner wall of the centrifugal pipe. An oil inlet hole is provided at a corresponding position of the straight section in the rotating shaft. One end of the oil inlet hole is connected with the oil outlet end of the oil pump, and the other end of the oil inlet hole is connected to the position of the outer wall of the rotating shaft deviated from the frustum section. A slag discharge hole is provided at the end of the frustum section away from the straight section, and an oil outlet hole is provided at the end of the straight section away from the frustum section.

[0006] During the oil pressing operation, the oil material is fed into the screw press for pressing. The crude oil drips onto the oil receiving pan and flows into the centrifugal drum. The centrifugal drum rotates to filter the crude oil, and the oil is discharged from the oil outlet holes into the oil storage ring cavity. Some powder residue remains in the centrifugal drum. The oil pump works to transfer the crude oil from the oil storage ring cavity to the oil inlet hole and then to the position of the frustum section in the straight section of the centrifugal pipe. The rotating shaft rotates, and the spiral blades rotate with the rotating shaft, driving the crude oil in the centrifugal pipe to rotate. The powder residue in the crude oil is larger than the oil. Under the action of centrifugal force, the powder residue accumulates on the inner wall of the centrifugal pipe. As the spiral blades rotate, it is transported to the end of the frustum section and finally discharged from the residue discharge hole. After centrifugal sedimentation, the oil is discharged from the oil outlet hole.

[0007] The crude oil first undergoes primary centrifugal filtration in a centrifugal drum, and then centrifugal sedimentation in a centrifugal pipe, thereby removing the powder and residue in the crude oil. This has a good removal effect and high work efficiency. Removing the powder and residue in the crude oil while pressing improves the quality of the crude oil and facilitates subsequent refining.

[0008] Preferably, a driven bevel gear is provided on the centrifugal cylinder, one end of the rotating shaft extends out of the centrifugal pipe and is provided with a driving bevel gear at the end, and the driving bevel gear is meshed with the driven bevel gear for transmission.

[0009] The centrifugal drum is driven by the rotating shaft, which simplifies the structure and reduces equipment investment.

[0010] Preferably, an oil-isolating convex ring is provided at the bottom of the fixed cylinder, and a mounting ring is provided at the lower end of the centrifugal cylinder. The mounting ring is adapted to be mounted in the oil-isolating convex ring, and the upper end of the oil-isolating convex ring is supported on the lower end surface of the centrifugal cylinder. A plane bearing is installed between the bottom of the mounting ring and the bottom of the fixed cylinder; a positioning bearing is installed between the upper outer wall of the centrifugal cylinder and the inner wall of the fixed cylinder.

[0011] The arrangement of the plane bearing and the locating bearing ensures the smooth operation of the centrifuge cylinder. The oil-isolating convex ring prevents oil from entering the plane bearing, and the mounting ring ensures the smooth installation of the centrifuge cylinder.

[0012] Preferably, a mounting hole is provided at the end of the straight section, a pressure storage ring groove is provided on the inner wall of the mounting hole, the rotating shaft is connected to the mounting hole, an oil hole connecting the pressure storage ring groove and the oil inlet hole is provided on the rotating shaft, the end of the straight section is connected to the oil inlet pipe connected to the pressure storage ring groove, and the oil inlet pipe is connected to the oil outlet end of the oil pump.

[0013] The oil output from the oil pump is sent into the pressure accumulator ring groove through the oil inlet pipe, and then into the oil inlet hole through the oil hole. The setting of the pressure accumulator ring groove ensures the reliable delivery of oil, and the oil can be continuously delivered to the oil inlet hole even if the shaft rotates.

[0014] Preferably, a plurality of slag discharge holes are evenly distributed circumferentially at the end of the frustum section, the end of the frustum section is connected to a material blocking cover, the material blocking cover covers the slag discharge holes, and a material discharge window is provided at the lower end of the material blocking cover.

[0015] The powder slag splashes out from the slag discharge hole, is blocked by the blocking cover, and finally is discharged from the discharge window on the blocking cover.

[0016] Preferably, a slag bucket is provided below the slag discharge hole, and an oil storage bucket is provided below the oil discharge hole. The slag bucket is convenient for collecting powdered slag, and the oil storage bucket is convenient for collecting crude oil.

[0017] Preferably, an axially movable oil delivery pipe is installed in the rotating shaft, and the inner hole of the oil delivery pipe forms an oil inlet hole. A connecting hole is provided in the rotating shaft, and the oil delivery pipe is installed in the connecting hole. A plurality of axially spaced liquid holes are provided on the rotating shaft, and the liquid holes are connected with the connecting hole. Liquid outlet holes are provided on the side wall of the oil delivery pipe. The oil delivery pipe moves so that the liquid outlet holes are connected with the liquid holes at different positions. A push rod is connected to the oil delivery pipe, and a return spring is installed between the oil delivery pipe and the connecting hole. A push ring is installed at the end of the straight section, and the push ring is sleeved on the rotating shaft. The push ring is connected to the telescopic rod of the piston cylinder, and the push rod fits the surface of the push ring.

[0018] In the initial state, under the action of the return spring, the end of the oil supply pipe abuts against the bottom of the connecting hole. At this time, the liquid outlet hole on the oil supply pipe is connected to the corresponding liquid hole closest to the cone section. During the operation of the rotating shaft, the piston telescopic rod periodically extends and contracts. The piston cylinder telescopic rod extends outward, driving the push ring to move away from the centrifugal pipe. The push ring pushes the push rod, thereby moving the oil supply pipe. The liquid outlet hole on the oil supply pipe is connected to another axially adjacent liquid hole. The liquid holes are arranged at axial intervals, so that the liquid holes at different positions can switch oil discharge, so that the crude oil can be dispersedly centrifuged at different positions, avoiding centrifugal sedimentation at one position that affects the centrifugal sedimentation effect. The use of liquid holes for oil discharge ensures the impact force of the oil discharge, making it easier for the powder residue to be impacted onto the inner wall of the centrifugal pipe, thereby improving the centrifugal sedimentation effect.

[0019] Preferably, one end of the connecting hole is connected to a closing plug, both ends of the oil delivery pipe are closed, and a return spring abuts between one end of the oil delivery pipe and the closing plug; an avoidance groove is provided on the rotating shaft, and the push rod passes through the avoidance groove.

[0020] The return spring is installed smoothly and reliably. The avoidance groove provides space for the movement of the push rod to avoid interference.

[0021] Preferably, a liquid inlet slot is provided on the side wall of the oil delivery pipe near the end of the straight section. The provision of the liquid inlet slot ensures that crude oil can always enter the oil delivery pipe during the movement of the oil delivery pipe.

[0022] An oil pressing method capable of removing crude oil powder residue is operated using an oil pressing device capable of removing crude oil powder residue, comprising the following steps:

[0023] S1, loading the oil into the screw press for pressing;

[0024] S2, the crude oil squeezed out by the screw press drips onto the oil receiving pan and flows into the centrifuge cylinder;

[0025] S3, the centrifugal cylinder rotates to centrifugally filter the crude oil, and the oil is discharged from the oil outlet holes into the oil storage ring cavity, and some powder residue remains in the centrifugal cylinder;

[0026] S4, the oil pump works to deliver the crude oil in the oil storage ring cavity to the oil inlet hole, and then to the position of the frustum section in the straight section of the centrifugal pipe;

[0027] S5, the shaft rotates, and the spiral blades rotate with the shaft, driving the crude oil in the centrifugal pipe to rotate. The powder residue in the crude oil is heavier than the oil. Under the action of centrifugal force, the powder residue gathers on the inner wall of the centrifugal pipe and is pushed to the end of the frustum section as the spiral blades rotate. Finally, it is discharged from the residue discharge hole; the oil after centrifugal sedimentation is discharged from the oil discharge hole.

[0028] The crude oil first undergoes primary centrifugal filtration in a centrifugal drum, and then centrifugal sedimentation in a centrifugal pipe, thereby removing the powder and residue in the crude oil. This has a good removal effect and high work efficiency. Removing the powder and residue in the crude oil while pressing improves the quality of the crude oil and facilitates subsequent refining.

[0029] Compared with the prior art, the present invention has the beneficial effects of good separation and removal of powder residue in crude oil during the oil pressing process and high working efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a structural schematic diagram of the present invention;

[0031] Figure 2 1 is a schematic structural diagram of a crude oil deslagging machine according to embodiment 1 of the present invention;

[0032] Figure 3 2 is a schematic structural diagram of a crude oil deslagging machine according to embodiment 2 of the present invention;

[0033] In the figure: 1. Screw press, 2. Crude oil deslagging machine, 3. Oil receiving tray, 4. Oil outlet, 5. Centrifugal filter unit, 6. Centrifugal sedimentation unit, 7. Fixed cylinder, 8. Centrifugal cylinder, 9. Oil outlet hole, 10. Oil storage ring cavity, 11. Oil pipeline, 12. Oil pump, 13. Rotating shaft, 14. Centrifugal pipeline, 15. Straight section, 16. Frustum section, 17. Spiral blade, 18. Oil inlet hole, 19. Slag outlet hole, 20. Oil outlet hole, 21. Connecting rib, 22. Driven bevel gear, 23. Driving bevel gear, 24. Driven gear, 25. Motor, 26. Driving gear, 27. Oil-isolating cam, 28. Mounting ring, 29. Plane bearing, 30. Positioning bearing, 31. Oil retaining ring, 32. Mounting hole, 33. Pressure ring groove, 34. Oil hole, 35. Oil inlet pipe, 36. Material blocking cover, 37. Material discharge window, 38. Slag barrel, 39. Oil storage barrel, 40. Oil pipe, 41. Oil delivery pipe, 42. Liquid outlet, 43. Push rod, 44. Return spring, 45. Push ring, 46. Closing plug, 47. Avoidance groove, 48. Ball, 49. Guide rod, 50. Liquid inlet tank hole, 51. Liquid through hole. DETAILED DESCRIPTION

[0034] The technical solution of the present invention is further described in detail below through specific embodiments and in conjunction with the accompanying drawings:

[0035] Example 1: An oil pressing device capable of removing crude oil powder residue (see attached Figure 1 , Attachment Figure 2 ), including a screw press 1 and a crude oil deslagging machine 2. The screw press is a prior art and will not be described in detail in this application. The screw press is provided with an oil receiving pan 3, and the oil receiving pan is provided with an oil outlet 4; the oil receiving pan is tilted, and the oil outlet is provided at the lower end of the oil receiving pan.

[0036] The crude oil remover includes a centrifugal filtration unit 5 and a centrifugal sedimentation unit 6. The centrifugal filtration unit includes a fixed cylinder 7 and a centrifugal cylinder 8. The centrifugal cylinder is rotatably installed in the fixed cylinder. The upper end opening of the centrifugal cylinder is arranged toward the oil outlet. A number of oil outlet holes 9 are densely distributed on the lower side wall of the centrifugal cylinder. An oil storage ring cavity 10 is formed between the outer wall of the centrifugal cylinder and the inner wall of the fixed cylinder. The bottom of the oil storage ring cavity is connected to the oil pipe 11, and the oil pipe is connected to the oil pump 12; the centrifugal sedimentation unit includes a rotating shaft 13 and a horizontally arranged centrifugal pipe 14. The rotating shaft is plug-in connected to the centrifugal pipe. The centrifugal pipe includes a straight section 15 and a frustum section 16. The inner diameter of the frustum section gradually decreases from the end connected to the straight section to the other end. A spiral blade 17 is installed on the rotating shaft. The outer edge of the spiral blade is adapted to the inner wall of the centrifugal pipe. The outer diameter of the spiral blade in the straight section is equal, and the outer diameter of the spiral blade in the frustum section gradually decreases from the end connected to the straight section to the other end. An oil inlet hole 18 is provided at the corresponding position within the straight section of the shaft. One end of the inlet hole is connected to the oil outlet of the oil pump. The other end of the inlet hole is connected to the outer wall of the shaft, which is offset from the frustum, via a radially arranged liquid hole 51. A slag discharge hole 19 is provided on the end of the frustum, away from the straight section, and an oil outlet hole 20 is provided on the end of the straight section, away from the frustum. A gap for oil flow is provided between the spiral blades within the straight section and the outer wall of the shaft. Connecting ribs 21 connect the spiral blades to the outer wall of the shaft.

[0037] The centrifuge cylinder is equipped with a driven bevel gear 22. One end of the shaft extends out of the centrifuge tube and is equipped with a driving bevel gear 23. The driving bevel gear and the driven bevel gear mesh together for transmission. The other end of the shaft also extends out of the centrifuge tube and is equipped with a driven gear 24. The shaft is driven by a motor 25. A driving gear 26 is mounted on the motor output shaft, meshing with the driven gear for transmission.

[0038] An oil-separating collar 27 is installed at the bottom of the fixed cylinder, while a mounting ring 28 is installed at the lower end of the centrifugal cylinder. This ring fits snugly into the collar, with its upper end supported on the lower end surface of the centrifugal cylinder. A plane bearing 29 is installed between the bottom of the mounting ring and the bottom of the fixed cylinder. A locating bearing 30 is installed between the upper outer wall of the centrifugal cylinder and the inner wall of the fixed cylinder. An oil deflector 31 is installed at the inner edge of the upper end of the oil-separating collar. A groove corresponding to the oil deflector is provided on the lower end surface of the centrifugal cylinder, and the oil deflector is installed in the groove. The inner bottom surface of the centrifugal cylinder is tilted downward from the center to the rounded edge.

[0039] The end of the straight segment is provided with a mounting hole 32, the inner wall of which is a pressure-accumulating ring groove 33. The rotating shaft is connected to the mounting hole, and an oil hole 34 is provided on the rotating shaft, connecting the pressure-accumulating ring groove and the oil inlet. The end of the straight segment is connected to an oil inlet pipe 35, which is connected to the pressure-accumulating ring groove. The oil inlet pipe is connected to the oil outlet of the oil pump. Several slag discharge holes are evenly distributed around the end of the frustum segment. The end of the frustum segment is connected to a material blocking cover 36, which covers the slag discharge holes and has a material discharge window 37 at its lower end. A slag bucket 38 is located below the slag discharge holes, and an oil storage tank 39 is located below the oil outlet hole. The oil outlet hole is connected to a flexible oil pipe 40, the lower end of which is placed in the oil storage tank. The straight segment and the frustum segment are connected and fastened by a flange.

[0040] An oil pressing method capable of removing crude oil powder residue is operated using an oil pressing device capable of removing crude oil powder residue, comprising the following steps:

[0041] S1, loading the oil into the screw press for pressing;

[0042] S2, the crude oil squeezed out by the screw press drips onto the oil receiving pan and flows into the centrifuge cylinder;

[0043] S3, the centrifugal cylinder rotates to centrifugally filter the crude oil, and the oil is discharged from the oil outlet holes into the oil storage ring cavity, and some powder residue remains in the centrifugal cylinder;

[0044] S4, the oil pump works to deliver the crude oil in the oil storage ring cavity to the oil inlet hole, and then to the position of the frustum section in the straight section of the centrifugal pipe;

[0045] S5, the shaft rotates, and the spiral blades rotate with the shaft, driving the crude oil in the centrifugal pipe to rotate. The powder residue in the crude oil is heavier than the oil. Under the action of centrifugal force, the powder residue gathers on the inner wall of the centrifugal pipe and is pushed to the end of the frustum section as the spiral blades rotate. Finally, it is discharged from the residue discharge hole; the oil after centrifugal sedimentation is discharged from the oil discharge hole.

[0046] Example 2: An oil pressing device capable of removing crude oil powder residue (see attached Figure 3), its structure is similar to that of Example 1, the main difference being that in this embodiment, an axially movable oil delivery pipe 41 is installed within the rotating shaft. The inner hole of the oil delivery pipe forms an oil inlet hole, a connecting hole is provided within the rotating shaft, and the oil delivery pipe is installed in the connecting hole. The rotating shaft is provided with a number of axially spaced liquid holes, which are connected to the connecting hole. A liquid outlet hole 42 is provided on the side wall of the oil delivery pipe. The oil delivery pipe moves so that the liquid outlet hole is connected to the corresponding liquid holes at different positions. A push rod 43 is connected to the oil delivery pipe, a return spring 44 is installed between the oil delivery pipe and the connecting hole, and a push ring 45 is installed at the end of the straight section. The push ring is sleeved on the rotating shaft and connected to the piston cylinder telescopic rod. The push rod and the push ring surface are in contact. One end of the connecting hole is connected to a closing plug 46, and both ends of the oil delivery pipe are closed. The return spring abuts between one end of the oil delivery pipe and the closing plug. A relief groove 47 is provided on the rotating shaft, and the push rod passes through the relief groove. A ball 48 is installed on the end face of the push rod, and the ball is in contact with the surface of the push ring. Several guide rods 49 are mounted at the ends of the straight segments, and the push ring is fitted over the guide rods. A liquid inlet slot 50 is provided on the sidewall of the oil delivery pipe near the end of the straight segment. This slot is connected to the oil passage hole, and its axial length is greater than the axial travel distance of the oil delivery pipe. The remaining structure is identical to that of Example 1.

[0047] A method for extracting crude oil residue, comprising steps similar to those of Example 1, differing primarily in that, during operation of the rotating shaft, in step S5, the piston telescopic rod periodically telescopes and extends. The piston cylinder telescopic rod extends outward, driving a push ring away from the centrifugal pipe. The push ring pushes the push rod, thereby moving the oil delivery pipe. The liquid outlet on the oil delivery pipe is connected to a corresponding liquid passage. When the piston cylinder telescopic rod contracts, the return spring acts to cause the end of the oil delivery pipe to abut against the bottom of the connecting hole. At this point, the liquid outlet on the oil delivery pipe is connected to the corresponding liquid passage closest to the frustum section, enabling switching of the liquid passages and allowing crude oil to be ejected into the centrifugal pipe at different locations for dispersed centrifugal precipitation. The remaining steps are the same as those of Example 1.

[0048] The above-described embodiments are only preferred solutions of the present invention and are not intended to limit the present invention in any form. Other variations and modifications are possible without exceeding the technical solutions described in the claims.

Claims

1. An oil pressing device capable of removing crude oil powder residue, characterized in that: The invention comprises a screw press and a crude oil deslagging machine. The screw press is provided with an oil receiving pan, and the oil receiving pan is provided with an oil outlet. The crude oil deslagging machine comprises a centrifugal filtration unit and a centrifugal sedimentation unit. The centrifugal filtration unit comprises a fixed cylinder and a centrifugal cylinder. The centrifugal cylinder is rotatably installed in the fixed cylinder. The upper end opening of the centrifugal cylinder is arranged toward the oil outlet. A plurality of oil outlet holes are densely distributed on the lower side wall of the centrifugal cylinder. An oil storage ring cavity is formed between the outer wall of the centrifugal cylinder and the inner wall of the fixed cylinder. The bottom of the oil storage ring cavity is connected to the oil pipeline, and the oil pipeline is connected to the oil pump. The centrifugal sedimentation unit comprises a rotating shaft and a horizontally arranged centrifugal pipe. The rotating shaft is plug-in connected to the centrifugal pipe. The centrifugal pipe comprises a straight section and a frustum section. The inner diameter of the frustum section gradually decreases from the connection end with the straight section to the other end. A spiral blade is installed on the rotating shaft. The outer edge of the spiral blade is adapted to the inner wall of the centrifugal pipe. The straight section inside the rotating shaft An oil inlet is provided at the corresponding position, one end of the oil inlet is connected with the oil outlet end of the oil pump, and the other end of the oil inlet is connected to the position of the frustum section on the outer wall of the rotating shaft, a slag discharge hole is provided on the end of the frustum section away from the straight section, and an oil outlet is provided on the end of the straight section away from the frustum section; an axially movable oil delivery pipe is installed in the rotating shaft, the inner hole of the oil delivery pipe forms an oil inlet hole, a connecting hole is provided in the rotating shaft, the oil delivery pipe is installed in the connecting hole, a plurality of axially spaced liquid holes are provided on the rotating shaft, the liquid holes are connected with the connecting holes, and a liquid outlet hole is provided on the side wall of the oil delivery pipe, and the oil delivery pipe moves so that the liquid outlet hole is correspondingly connected with the liquid holes at different positions; a push rod is connected to the oil delivery pipe, a return spring is installed between the oil delivery pipe and the connecting hole, a push ring is installed at the end of the straight section, the push ring is sleeved on the rotating shaft, the push ring is connected to the telescopic rod of the piston cylinder, and the push rod fits the surface of the push ring.

2. The oil pressing device capable of removing crude oil powder residue according to claim 1, characterized in that: A driven bevel gear is provided on the centrifugal cylinder, one end of the rotating shaft extends out of the centrifugal pipe and is provided with a driving bevel gear at the end, and the driving bevel gear is meshed with the driven bevel gear for transmission.

3. The oil pressing device capable of removing crude oil powder residue according to claim 1, characterized in that: An oil-isolating convex ring is provided at the bottom of the fixed cylinder, and a mounting ring is provided at the lower end of the centrifugal cylinder. The mounting ring is adapted to be assembled in the oil-isolating convex ring. The upper end of the oil-isolating convex ring is supported on the lower end surface of the centrifugal cylinder. A plane bearing is installed between the bottom of the mounting ring and the bottom of the fixed cylinder; a locating bearing is installed between the upper outer wall of the centrifugal cylinder and the inner wall of the fixed cylinder.

4. The oil pressing device capable of removing crude oil powder residue according to claim 1, characterized in that: A mounting hole is provided at the end of the straight section, a pressure storage ring groove is provided on the inner wall of the mounting hole, the rotating shaft is connected to the mounting hole, an oil hole connecting the pressure storage ring groove and the oil inlet hole is provided on the rotating shaft, the end of the straight section is connected to the oil inlet pipe connected to the pressure storage ring groove, and the oil inlet pipe is connected to the oil outlet end of the oil pump.

5. The oil pressing device capable of removing crude oil powder residue according to claim 1, characterized in that: A plurality of slag discharge holes are evenly distributed circumferentially at the end of the frustum section, the end of the frustum section is connected to a material blocking cover, the material blocking cover covers the slag discharge holes, and a material discharge window is arranged at the lower end of the material blocking cover.

6. An oil pressing device capable of removing crude oil powder residue according to any one of claims 1 to 5, characterized in that: A slag bucket is provided below the slag discharge hole, and an oil storage bucket is provided below the oil discharge hole.

7. The oil pressing device capable of removing crude oil powder residue according to claim 6, characterized in that: One end of the connecting hole is connected to the closing plug, both ends of the oil delivery pipe are closed, and the return spring abuts between one end of the oil delivery pipe and the closing plug; an avoidance groove is provided on the rotating shaft, and the push rod passes through the avoidance groove.

8. The oil pressing device capable of removing crude oil powder residue according to claim 6, characterized in that: A liquid inlet slot is provided on the side wall of the oil delivery pipe near the end of the straight section.

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