Impurity removing and screening device for chemical oil refining

Abstract

The invention belongs to the technical field of chemical oil refining, and particularly relates to an impurity removing and screening device for chemical oil refining, when the impurity removing and screening device is used, crude oil firstly falls on a filtering device to be filtered and then falls on a screening device to be screened after being filtered by the filtering device, the screened crude oil flows out of the bottom end of a shell, and other impurities are sent out of the shell; when the crude oil is filtered, the crude oil and impurities above the filtering device are scraped off through a scraping plate, so that blockage of the filtering device caused by impurity accumulation can be effectively avoided, and the filtering speed can also be increased; when the arc-shaped scraping plate scrapes crude oil above the filtering device, the crude oil and impurities flow towards the outer edge along the convex surface of the scraping plate, the impurities and a small part of the crude oil enter the collecting device through the connecting holes above, the crude oil returns into the shell after passing through the magnetic filtering cylinder, and the impurities are retained in the magnetic filtering cylinder, so that the crude oil is effectively collected. The purpose of cleaning the filtering device is achieved without replacing the filtering device, so that the time is saved, and the working efficiency is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of chemical oil refining, and in particular relates to a chemical oil refining impurity removal and screening device. Background Art

[0002] Chemical refining is a process of distilling crude oil or other oils without changing the molecular structure. It generally refers to petroleum refining, that is, cracking crude oil into kerosene, gasoline, diesel, heavy oil and other fuels suitable for use in internal combustion engines, and producing chemical raw materials such as olefins, aromatics, etc. Crude oil contains a large amount of impurities, which may affect the purity of the back-end refining and purification.

[0003] When the existing chemical oil refining impurity removal and screening device is in use, the filter screen of the filtering device needs to be taken out after being used for a period of time, and the debris on the filter screen needs to be cleaned and reinstalled for use, otherwise it will affect the filtering efficiency of the filter screen. However, the replacement and cleaning of the filter screen takes time and will also affect the work efficiency. Therefore, a chemical oil refining impurity removal and screening device is proposed. Summary of the invention

[0004] The purpose of the present invention is to provide a chemical oil refining impurity removal and screening device to solve the above problems.

[0005] To achieve the above object, the present invention provides the following solutions:

[0006] A chemical oil refining impurity removal and screening device, comprising:

[0007] A filter device is arranged in the housing and located at an upper portion of the housing;

[0008] A scraper is arranged in the housing and above the filter device, the scraper is arranged in an arc shape, the scraper is in sliding contact with the filter device, and the scraper is drivingly connected to a driving assembly arranged above the housing;

[0009] A collecting device is arranged on one side of the shell, the collecting device is connected to the inner cavity of the shell through two connecting holes, the two connecting holes are arranged up and down, the filtering device is located between the two connecting holes, and a magnetic filter cartridge is arranged in the collecting device, and the magnetic filter cartridge is located between the two connecting holes;

[0010] The screening device is arranged in the shell and located at the lower part of the shell.

[0011] Preferably, the filtering device comprises:

[0012] A plurality of support rods are arranged in the shell at equal intervals in the circumferential direction, the support rods are arranged obliquely and the lower ends are fixedly connected to the inner side wall of the shell, and the other ends are fixedly connected to a fixing ring;

[0013] The magnetic filter is laid on the top surface of the plurality of support rods. The magnetic filter is fixedly connected to the inner wall of the shell and the fixing ring. The cross section of the magnetic filter is wavy. The scraper is adapted to the shape of the magnetic filter and the scraper is in sliding contact with the magnetic filter.

[0014] Preferably, the collecting device comprises:

[0015] An auxiliary cylinder is fixedly connected to the outer wall of the shell and communicated with the inner cavity of the shell through the two connecting holes. A lap ring is fixedly connected to the inner wall of the auxiliary cylinder circumferentially. The outer edge of the magnetic filter cylinder is lapped on the lap ring. A distance is left between the magnetic filter cylinder and the inner wall of the auxiliary cylinder.

[0016] An end cap, detachably connected to the top opening of the auxiliary cylinder;

[0017] A handle is fixedly connected to the magnetic filter cartridge, and the top end of the handle extends into the end cover.

[0018] Preferably, the screening device comprises:

[0019] A plurality of slide bars are vertically arranged on the inner bottom wall of the shell, and the plurality of slide bars are arranged at equal intervals in the circumferential direction;

[0020] A plurality of outer ring bodies are arranged on the plurality of sliding rods at equal intervals from top to bottom, the outer ring bodies are arranged obliquely, and the outer edges of the outer ring bodies are in sliding contact with the inner side wall of the shell;

[0021] An inner ring body is coaxially arranged in the outer ring body, the inner ring body and the outer ring body are fixedly connected by a plurality of connecting rods, and the plurality of connecting rods are circumferentially arranged at equal intervals;

[0022] A filter membrane is circumferentially fixed between the outer ring body and the inner ring body, and the filter membrane is located above the connecting rod;

[0023] A plurality of waste valves are connected to the outer wall of the shell at equal intervals from top to bottom. The plurality of waste valves are arranged in one-to-one correspondence with the plurality of outer ring bodies, and the waste valves are located at the lower end of the outer ring body.

[0024] Preferably, the driving assembly comprises:

[0025] A driving motor is fixedly connected to the top of the housing;

[0026] A reducer, whose input shaft is coaxially fixedly connected with the output shaft of the driving motor, and the reducer is fixedly connected to the top end of the housing;

[0027] The main shaft is coaxially rotatably connected in the shell, the top end of the main shaft passes through the top end of the shell and is coaxially fixed to the output shaft of the reducer, the scraper is fixed to the main shaft, and the fixing ring and the plurality of inner ring bodies are all rotatably connected to the main shaft.

[0028] Preferably, an annular sliding groove is circumferentially provided at the inner edge of the fixed ring, a rotating ring is rotatably connected in the annular sliding groove, and the rotating ring is coaxially fixed to the main shaft.

[0029] Preferably, a plurality of top blocks are coaxially fixedly connected to the outer wall of the main shaft, the plurality of top blocks are arranged in one-to-one correspondence with the plurality of inner ring bodies, the top blocks are located below the inner ring bodies, and the top ends of the top blocks are spirally provided with steps;

[0030] The bottom end of the inner ring body is fixedly connected with a top column, the bottom end of the top column is rotatably connected with a roller, and the roller is in rolling contact with the top block;

[0031] A plurality of limit block groups are fixedly connected to the slide rod, and the plurality of limit block groups are arranged in one-to-one correspondence with the plurality of outer ring bodies. The limit block group includes two limit blocks arranged up and down, and the outer ring body is located between the two limit blocks in the same limit block group. A spring is arranged between the outer ring body and the two limit blocks, and the spring is sleeved on the slide rod.

[0032] Preferably, the top end of the shell is fixedly connected to and communicated with a feed hopper.

[0033] Preferably, an oil outlet is provided at the bottom end of the shell, a discharge pipe is fixedly connected to the oil outlet and communicated with the discharge pipe, and a discharge valve is provided on the discharge pipe.

[0034] Compared with the prior art, the present invention has the following advantages and technical effects:

[0035] When the device of the present invention is in use, the crude oil first falls on the filter device for filtering, and then falls on the screening device for screening after being filtered by the filter device. The screened crude oil flows out from the bottom end of the shell, and the remaining impurities are sent out of the shell. When the crude oil is filtered, the crude oil and impurities above the filter device are scraped off by the scraper, which can effectively avoid the accumulation of impurities and cause the filter device to be blocked, and can also speed up the filtering speed. When the arc-shaped scraper scrapes off the crude oil above the filter device, the crude oil and impurities flow along the convex surface of the scraper to the outer edge, and the impurities and a small part of the crude oil enter the collection device through the upper connecting hole. The crude oil returns to the shell after passing through the magnetic filter cartridge, and the impurities are retained in the magnetic filter cartridge. In this way, the purpose of cleaning the filter device is achieved without replacing the filter device, saving time and improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative labor:

[0037] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0038] Figure 2 for Figure 1 A partial enlarged view of the middle A;

[0039] Figure 3 for Figure 1 A partial enlarged view of point B in the middle;

[0040] Figure 4 for Figure 1 A partial enlarged view of point C in the middle;

[0041] Figure 5 for Figure 1 A partial enlarged view of point D in the middle;

[0042] Among them, 1. Shell; 2. Feed hopper; 3. Reducer; 4. Drive motor; 5. Support rod; 6. Magnetic filter; 7. Scraper; 8. Main shaft; 9. Auxiliary cylinder; 10. Magnetic filter cartridge; 11. End cover; 12. Handle; 13. Waste valve; 14. Slide rod; 15. Leg; 16. Discharge pipe; 17. Discharge valve; 18. Inspection door; 19. Limit block; 20. Spring; 21. Outer ring; 22. Connecting rod; 23. Filter membrane; 24. Lap ring; 25. Fixed ring; 26. Annular slide; 27. Rotating ring; 28. Inner ring; 29. ​​Top column; 30. Roller; 31. Top block. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0044] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0045] Reference Figures 1 to 5 The present invention discloses a chemical oil refining impurity removal and screening device, comprising:

[0046] A filtering device is arranged in the housing 1 and located at the upper part of the housing 1;

[0047] A plurality of legs 15 are fixedly connected to the bottom end of the housing 1 at equal intervals in the circumferential direction, for supporting the housing 1;

[0048] The scraper 7 is arranged in the housing 1 and above the filter device. The scraper 7 is arranged in an arc shape. The scraper 7 is in sliding contact with the filter device. The scraper 7 is transmission-connected to a driving assembly arranged above the housing 1.

[0049] The collecting device is arranged on one side of the housing 1. The collecting device is connected to the inner cavity of the housing 1 through two connecting holes. The two connecting holes are arranged up and down. The filtering device is located between the two connecting holes. A magnetic filter cartridge 10 is arranged in the collecting device. The magnetic filter cartridge 10 is located between the two connecting holes.

[0050] The screening device is arranged in the shell 1 and located at the lower part of the shell 1 .

[0051] When the device of the present invention is in use, the crude oil first falls on the filter device for filtering, and then falls on the screening device for screening after being filtered by the filter device. The screened crude oil flows out from the bottom end of the shell 1, and the remaining impurities are sent out of the shell 1; wherein, when the crude oil is filtered, the crude oil and impurities above the filter device are scraped off by the scraper 7, which can effectively avoid the accumulation of impurities and cause the filter device to be blocked, and can also speed up the filtering speed; while the arc-shaped scraper 7 scrapes off the crude oil above the filter device, the crude oil and impurities flow along the convex surface of the scraper 7 to the outer edge, and the impurities and a small part of the crude oil enter the collection device through the upper connecting hole, and the crude oil passes through the magnetic filter cartridge 10 and returns to the shell 1 through the lower connecting hole, and the impurities are retained in the magnetic filter cartridge 10. In this way, the purpose of cleaning the filter device is achieved without replacing the filter device, saving time and improving work efficiency.

[0052] Further optimization scheme, the filtering device includes:

[0053] A plurality of support rods 5 are arranged in the housing 1 at equal intervals in the circumferential direction. The support rods 5 are arranged obliquely and the lower ends are fixedly connected to the inner wall of the housing 1, and the other ends are fixedly connected to the fixing ring 25;

[0054] The magnetic filter 6 is laid on the top surface of multiple support rods 5. The magnetic filter 6 is fixed to the inner wall of the shell 1 and the fixing ring 25. The cross-section of the magnetic filter 6 is wavy. The scraper 7 is adapted to the shape of the magnetic filter 6, and the scraper 7 is in sliding contact with the magnetic filter 6.

[0055] Further optimizing the scheme, the collecting device includes:

[0056] The auxiliary cylinder 9 is fixedly connected to the outer wall of the housing 1 and communicated with the inner cavity of the housing 1 through two connecting holes. A lap ring 24 is fixedly connected to the inner wall of the auxiliary cylinder 9 in a circumferential direction. The outer edge of the magnetic filter cylinder 10 is lapped on the lap ring 24. A distance is left between the magnetic filter cylinder 10 and the inner wall of the auxiliary cylinder 9.

[0057] The end cover 11 is detachably connected to the top opening of the auxiliary tube 9; the connection method between the end cover 11 and the auxiliary tube 9 includes but is not limited to threaded connection and clamping;

[0058] The handle 12 is fixedly connected to the magnetic filter cartridge 10 , and the top end of the handle 12 extends into the end cover 11 .

[0059] To further optimize the solution, the screening device includes:

[0060] A plurality of slide bars 14 are vertically arranged on the inner bottom wall of the housing 1, and the plurality of slide bars 14 are arranged at equal intervals in the circumferential direction;

[0061] A plurality of outer ring bodies 21 are arranged on the plurality of slide bars 14 at equal intervals from top to bottom, the outer ring bodies 21 are arranged obliquely, and the outer edges of the outer ring bodies 21 are in sliding contact with the inner wall of the housing 1;

[0062] The inner ring body 28 is coaxially arranged in the outer ring body 21. The inner ring body 28 and the outer ring body 21 are fixedly connected by a plurality of connecting rods 22. The plurality of connecting rods 22 are arranged at equal intervals in the circumferential direction.

[0063] The filter membrane 23 is circumferentially fixed between the outer ring body 21 and the inner ring body 28, and the filter membrane 23 is located above the connecting rod 22;

[0064] A plurality of waste valves 13 are connected to the outer wall of the shell 1 at equal intervals from top to bottom. The plurality of waste valves 13 are arranged correspondingly to the plurality of outer ring bodies 21 , and the waste valves 13 are located at the lower end of the outer ring body 21 .

[0065] To further optimize the solution, the drive components include:

[0066] The driving motor 4 is fixedly connected to the top of the housing 1;

[0067] The reducer 3, whose input shaft is coaxially fixed with the output shaft of the driving motor 4, is fixed to the top of the housing 1;

[0068] The main shaft 8 is coaxially rotatably connected in the housing 1. The top end of the main shaft 8 passes through the top end of the housing 1 and is coaxially fixed to the output shaft of the reducer 3. The scraper 7 is fixed to the main shaft 8. The fixing ring 25 and multiple inner ring bodies 28 are all rotatably connected to the main shaft 8.

[0069] According to a further optimization scheme, an annular groove 26 is circumferentially provided at the inner edge of the fixed ring 25 , and a rotating ring 27 is rotatably connected in the annular groove 26 . The rotating ring 27 is coaxially fixed to the main shaft 8 .

[0070] Further optimized solution, multiple top blocks 31 are coaxially fixed on the outer wall of the main shaft 8, and the multiple top blocks 31 are arranged one by one corresponding to the multiple inner ring bodies 28. The top blocks 31 are located below the inner ring body 28, and the top of the top blocks 31 is spirally provided with steps;

[0071] The bottom end of the inner ring body 28 is fixedly connected with a top column 29, and the bottom end of the top column 29 is rotatably connected with a roller 30, and the roller 30 is in rolling contact with the top block 31;

[0072] A plurality of limit block groups are fixedly connected to the slide rod 14, and the plurality of limit block groups are arranged in one-to-one correspondence with the plurality of outer ring bodies 21. The limit block group includes two limit blocks 19 arranged up and down, and the outer ring body 21 is located between the two limit blocks 19 in the same limit block group. A spring 20 is arranged between the outer ring body 21 and the two limit blocks 19, and the spring 20 is sleeved on the slide rod 14.

[0073] According to a further optimized solution, the top of the shell 1 is fixedly connected to and communicated with a feed hopper 2 .

[0074] According to a further optimization scheme, an oil outlet is provided at the bottom end of the shell 1 , a discharge pipe 16 is fixedly connected to the oil outlet and communicated with the discharge pipe 16 , and a discharge valve 17 is provided on the discharge pipe 16 .

[0075] Working process:

[0076] The crude oil is fed into the shell 1 through the feed hopper 2 above the shell 1. The crude oil first falls on the magnetic filter 6, and then the reducer 3 is driven to rotate by the driving motor 4. The reducer 3 drives the main shaft 8 to rotate, and then drives the scraper 7 to rotate to scrape the crude oil and impurities above the magnetic filter 6. The height of the magnetic filter 6 gradually decreases from the center to the outer edge, which is convenient for impurities to flow into the auxiliary cylinder 9 through the connecting hole. The cross-section of the magnetic filter 6 is set to be wavy to prevent the crude oil from flowing directly to the outer edge of the magnetic filter 6 under the action of gravity, affecting the filtering efficiency. A plurality of support rods 5 are connected to the fixed ring 25. The inner edge of the fixed ring 25 is circumferentially provided with an annular chute 26. A rotating ring 27 is rotatably connected in the annular chute 26. The rotating ring 27 is coaxially fixed to the main shaft 8, so that the magnetic filter 6 can withstand the impact of crude oil and increase its service life. At regular intervals, the end cover 11 is opened, and the magnetic filter cartridge 10 is taken out by the handle 12, and a new magnetic filter cartridge 10 can be replaced, which is convenient and quick.

[0077] The filtered crude oil falls on the top of the screening device, wherein the outer ring body 21 is provided with three from top to bottom, and the filter membranes 23 are respectively a macromolecular filter membrane, a small molecule filter membrane and an oil-water separation membrane from top to bottom. After the crude oil passes through the macromolecular filter membrane, the small molecule filter membrane and the oil-water separation membrane in sequence, it flows out from the discharge pipe 16 at the bottom end of the shell 1, and the rotation of the main shaft 8 drives the top block 31 to rotate. The step at the top of the top block 31 drives the inner ring body 28 to move up and down through the top column 29, thereby driving the filter membrane 23 to vibrate, thereby accelerating the screening efficiency. The setting of the limit block 19 and the spring 20 can make the inner ring body 28 quickly reset and improve the vibration effect; the outer ring body 21 is inclined, and a waste valve 13 is provided at the lower end. The screened impurities flow to the waste valve 13 under the action of gravity, and are finally discharged from the shell 1 through the waste valve 13;

[0078] An inspection door 18 is sealed and connected to the outer wall of the shell 1 through bolts, and the working parts in the shell 1 can be repaired or replaced through the inspection door 18; the slide rod 14 is threadedly connected to the bottom wall of the shell 1, and the slide rod 14 can be taken out when necessary.

[0079] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0080] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A chemical oil refining impurity removal and screening device, characterized in that: include: A filtering device, arranged in the housing (1) and located at the upper part of the housing (1); A scraper (7) is arranged in the housing (1) and located above the filtering device, the scraper (7) is arranged in an arc shape, the scraper (7) is in sliding contact with the filtering device, and the scraper (7) is drivingly connected to a driving component arranged above the housing (1); A collecting device is arranged on one side of the shell (1), the collecting device is connected to the inner cavity of the shell (1) through two connecting holes, the two connecting holes are arranged up and down, the filtering device is located between the two connecting holes, and a magnetic filter cartridge (10) is arranged in the collecting device, and the magnetic filter cartridge (10) is located between the two connecting holes; A screening device is arranged in the shell (1) and located at the lower part of the shell (1).

2. A chemical oil refining impurity removal and screening device according to claim 1, characterized in that: The filtering device comprises: A plurality of support rods (5) are arranged in the housing (1) at equal intervals in the circumferential direction, the support rods (5) are arranged obliquely and the lower ends are fixedly connected to the inner wall of the housing (1), and the other ends are fixedly connected to a fixing ring (25); A magnetic filter (6) is laid on the top surface of the plurality of support rods (5); the magnetic filter (6) is fixedly connected to the inner wall of the shell (1) and the fixing ring (25); the cross section of the magnetic filter (6) is wavy; the scraper (7) is adapted to the shape of the magnetic filter (6); and the scraper (7) is in sliding contact with the magnetic filter (6).

3. A chemical oil refining impurity removal and screening device according to claim 1, characterized in that: The collecting device comprises: An auxiliary cylinder (9) is fixedly connected to the outer wall of the shell (1) and communicated with the inner cavity of the shell (1) through the two connecting holes. A lap ring (24) is circumferentially fixedly connected to the inner wall of the auxiliary cylinder (9). The outer edge of the magnetic filter cylinder (10) is lapped on the lap ring (24). A distance is left between the magnetic filter cylinder (10) and the inner wall of the auxiliary cylinder (9); An end cover (11) is detachably connected to the top opening of the auxiliary tube (9); A handle (12) is fixedly connected to the magnetic filter cartridge (10), and the top end of the handle (12) extends into the end cover (11).

4. A chemical oil refining impurity removal and screening device according to claim 2, characterized in that: The screening device comprises: A plurality of slide bars (14) are vertically arranged on the inner bottom wall of the housing (1), and the plurality of slide bars (14) are arranged at equal intervals in the circumferential direction; A plurality of outer ring bodies (21) are arranged on the plurality of sliding rods (14) at equal intervals from top to bottom, the outer ring bodies (21) are arranged obliquely, and the outer edges of the outer ring bodies (21) are in sliding contact with the inner wall of the shell (1); An inner ring body (28) is coaxially arranged inside the outer ring body (21), the inner ring body (28) and the outer ring body (21) are fixedly connected via a plurality of connecting rods (22), and the plurality of connecting rods (22) are arranged at equal intervals in the circumferential direction; A filter membrane (23) is circumferentially fixed between the outer ring body (21) and the inner ring body (28), and the filter membrane (23) is located above the connecting rod (22); A plurality of waste valves (13) are connected to the outer wall of the shell (1) at equal intervals from top to bottom. The plurality of waste valves (13) are arranged in one-to-one correspondence with the plurality of outer ring bodies (21). The waste valves (13) are located at the lower end of the outer ring body (21).

5. A chemical oil refining impurity removal and screening device according to claim 4, characterized in that: The drive assembly comprises: A driving motor (4) is fixedly connected to the top end of the housing (1); A reducer (3), the input shaft of which is coaxially fixedly connected to the output shaft of the drive motor (4), and the reducer (3) is fixedly connected to the top end of the housing (1); The main shaft (8) is coaxially rotatably connected in the housing (1), the top end of the main shaft (8) passes through the top end of the housing (1) and is coaxially fixedly connected to the output shaft of the reducer (3), the scraper (7) is fixedly connected to the main shaft (8), and the fixing ring (25) and the plurality of inner ring bodies (28) are all rotatably connected to the main shaft (8).

6. A chemical oil refining impurity removal and screening device according to claim 5, characterized in that: An annular sliding groove (26) is circumferentially provided at the inner edge of the fixed ring (25), a rotating ring (27) is rotatably connected in the annular sliding groove (26), and the rotating ring (27) is coaxially fixedly connected to the main shaft (8).

7. A chemical oil refining impurity removal and screening device according to claim 5, characterized in that: A plurality of top blocks (31) are coaxially fixedly connected to the outer wall of the main shaft (8), the plurality of top blocks (31) are arranged one-to-one correspondingly to the plurality of inner ring bodies (28), the top blocks (31) are located below the inner ring bodies (28), and the top ends of the top blocks (31) are spirally provided with steps; The bottom end of the inner ring body (28) is fixedly connected to a top column (29), the bottom end of the top column (29) is rotatably connected to a roller (30), and the roller (30) is in rolling contact with the top block (31); A plurality of limit block groups are fixedly connected to the slide bar (14), and the plurality of limit block groups are arranged in one-to-one correspondence with the plurality of outer ring bodies (21). The limit block group includes two limit blocks (19) arranged up and down, and the outer ring body (21) is located between the two limit blocks (19) in the same limit block group. A spring (20) is arranged between the outer ring body (21) and the two limit blocks (19), and the spring (20) is sleeved on the slide bar (14).

8. A chemical oil refining impurity removal and screening device according to claim 1, characterized in that: The top end of the shell (1) is fixedly connected to and communicated with a feed hopper (2).

9. A chemical oil refining impurity removal and screening device according to claim 1, characterized in that: An oil outlet is provided at the bottom end of the housing (1), and a discharge pipe (16) is fixedly connected to and communicated with the oil outlet, and a discharge valve (17) is provided on the discharge pipe (16).

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