Oil slurry ultrafiltration purification equipment

Abstract

The utility model discloses oil slurry ultrafiltration purification equipment. The purification equipment comprises a feeding unit, a circulating filtration unit and a discharging unit, the feeding unit is connected with the circulating filtering unit; the discharging unit is connected with the circulating filtering unit; the feeding unit is provided with an oil slurry inlet; the circulating filtration unit comprises at least one ultrafiltration membrane filter; an ultrafiltration membrane is arranged in the ultrafiltration membrane filter; and the discharging unit is used for collecting the filtered oil slurry. At least one ultrafiltration membrane filter is arranged in the circulating filtration unit, and an ultrafiltration membrane is arranged in the ultrafiltration membrane filter. In the filtering process, oil slurry gradually permeates to the outer surface from the inner surface of the ultrafiltration membrane tube, so that catalyst impurities in the oil slurry can be effectively removed, and the filtering effect is improved.

Description

Technical Field

[0001] This utility model relates to the field of catalytic oil slurry purification technology, and in particular to an oil slurry ultrafiltration purification device. Background Technology

[0002] Catalytic cracking is a secondary processing method for the lightening of heavy oil. With the gradual improvement of catalytic cracking technology, the amount of catalytic cracking slurry produced has also increased year by year, reaching 3 to 10% of the processing capacity of catalytic cracking units. Catalytic cracking slurry is not only a high-quality raw material for producing needle coke, carbon black, and rubber softening agents, but it can also be used as a hydrogenation feedstock. However, due to the presence of a large number of catalyst particles, it cannot be used directly.

[0003] Existing methods for removing catalyst from catalytic cracking slurry include sedimentation, electrostatic separation, filtration, and centrifugation. Sedimentation is difficult to remove particles smaller than 20 nm and requires high temperatures and long processing times. Electrostatic separation is highly dependent on the properties of the slurry, and its operating parameters are difficult to control, making industrial application challenging. Filtration suffers from problems such as filter element clogging, difficult cleaning and regeneration, and short service life. Centrifugation is labor-intensive and difficult to scale up for mass production. Utility Model Content

[0004] In view of the above problems, the purpose of this utility model is to provide an oil slurry ultrafiltration purification device.

[0005] This utility model embodiment provides an oil slurry ultrafiltration purification device, including:

[0006] Feeding unit, circulating filtration unit, and discharging unit;

[0007] The feeding unit is connected to the circulating filtration unit;

[0008] The discharge unit is connected to the circulating filtration unit;

[0009] The feeding unit is equipped with an oil slurry inlet;

[0010] The circulating filtration unit includes at least one ultrafiltration membrane filter; the ultrafiltration membrane filter is provided with an ultrafiltration membrane.

[0011] The discharge unit is used to collect the filtered oil slurry.

[0012] In one embodiment, the ultrafiltration membrane filter includes: a first ultrafiltration membrane filter and a second ultrafiltration membrane filter;

[0013] The first ultrafiltration membrane filter and the second ultrafiltration membrane filter are connected by a connecting pipe;

[0014] The first ultrafiltration membrane filter is also connected to the discharge unit;

[0015] The second ultrafiltration membrane filter is also connected to the discharge unit.

[0016] In one embodiment, the pore size of the ultrafiltration membrane in the ultrafiltration membrane filter ranges from 10 nm to 1.25 μm.

[0017] In one embodiment, the axial direction of the ultrafiltration membrane forms an acute angle with the inflow direction of the oil slurry to be filtered.

[0018] In one embodiment, the ultrafiltration membrane is made of ceramic material.

[0019] In one embodiment, it further includes: a cleaning unit;

[0020] The cleaning unit is equipped with a cleaning inlet and a soft water inlet.

[0021] In one embodiment, the circulating filtration unit further includes: a circulating pump, a first circulating pipe, and a second circulating pipe;

[0022] The circulating pump, the first circulating pipeline, the first ultrafiltration membrane filter, the connecting pipeline, the second ultrafiltration membrane filter, and the second circulating pipeline are connected in sequence.

[0023] The second circulation pipe is connected to the circulation pump;

[0024] The circulating pump is also connected to the feeding unit and the cleaning unit.

[0025] In one embodiment, the feeding unit is further provided with a diesel inlet and a nitrogen inlet.

[0026] In one embodiment, the discharge unit is provided with a clean oil outlet and a concentrated oil outlet.

[0027] In one embodiment, the discharge unit is further provided with a sludge oil outlet.

[0028] The beneficial effects of the above-mentioned technical solutions provided by the embodiments of this utility model include at least the following:

[0029] The oil slurry ultrafiltration purification equipment provided in this embodiment includes a feeding unit, a circulating filtration unit, and a discharging unit. The circulating filtration unit contains at least one ultrafiltration membrane filter, and the ultrafiltration membrane filter contains an ultrafiltration membrane. During the filtration process, the oil slurry gradually permeates from the inner surface to the outer surface of the ultrafiltration membrane tube, effectively removing catalyst impurities from the oil slurry and improving the filtration effect.

[0030] Furthermore, the pore size range of the ultrafiltration membrane in the ultrafiltration membrane filter can effectively trap catalyst particles in the oil slurry, thereby improving the filtration accuracy of the oil slurry.

[0031] Furthermore, the axial direction of the ultrafiltration membrane is at an acute angle to the flow direction of the oil slurry to be filtered, which can avoid the direct scouring effect of the high-speed flowing oil slurry on the ultrafiltration membrane and improve the service life of the ultrafiltration membrane.

[0032] Furthermore, the ultrafiltration membrane uses high-temperature resistant ceramic materials, allowing the temperature of the oil slurry to be filtered to reach 210–260°C. Simultaneously, the feeding unit is equipped with a diesel inlet, allowing diesel fuel to be introduced and mixed with the oil slurry. This reduces the viscosity of the oil slurry, decreases the resistance to its flow within the equipment, and thus improves the filtration effect.

[0033] Furthermore, the circulating filtration unit is equipped with a circulating pump and multiple circulating pipes, which allows the oil slurry to be filtered to be pressurized by the circulating pump and continuously circulated and filtered under pressure, thereby improving the filtration effect of the oil slurry.

[0034] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of this invention may be realized and obtained by means of the structures particularly pointed out in the written description, claims, and drawings.

[0035] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0036] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0037] Figure 1 This is a schematic diagram of the structure of the oil slurry ultrafiltration purification equipment in the embodiments of this utility model;

[0038] Figure 2 This is a schematic diagram of the ultrafiltration membrane filter structure in an embodiment of the present invention;

[0039] Figure 3 This is a schematic diagram of the ultrafiltration membrane structure in an embodiment of the present invention;

[0040] Figure 4 This is a schematic diagram of the connection arrangement of various pipes in the purification equipment in this embodiment of the utility model;

[0041] Figure 5 As an embodiment of this utility model Figure 1 A magnified view of part A;

[0042] Figure 6 As an embodiment of this utility model Figure 1 A magnified view of part B;

[0043] Figure 7 As an embodiment of this utility model Figure 1 A magnified view of a portion of C.

[0044] Explanation of reference numerals in the attached figures:

[0045] 1. Feeding unit; 11. Slurry valve; 12. Feed filter; 13. Diesel valve; 14. Nitrogen valve; 15. First conveying pipe; 16. Second conveying pipe; 17. Third conveying pipe; 18. Fourth conveying pipe;

[0046] 2. Circulating filtration unit; 21. Circulating pump; 22. Ultrafiltration membrane filter; 221. Ultrafiltration membrane; 23. First circulation pipeline; 24. Second circulation pipeline; 25. Connecting pipeline;

[0047] 3. Cleaning unit; 31. Soft water valve; 32. Cleaning solution storage tank; 33. Transfer pump; 34. Wastewater valve; 35. First cleaning pipeline; 36. Second cleaning pipeline; 37. Third cleaning pipeline; 38. Fourth cleaning pipeline;

[0048] 4. Discharge unit; 41. Clean oil valve; 42. Concentrated oil valve; 43. Sludge oil valve; 44. First discharge pipe; 45. Second discharge pipe; 46. Third discharge pipe. Detailed Implementation

[0049] This embodiment provides an oil slurry ultrafiltration purification device. Although exemplary embodiments of this disclosure are shown in the accompanying drawings, it should be understood that this disclosure can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of this disclosure to those skilled in the art.

[0050] This utility model embodiment provides an oil slurry ultrafiltration purification device, referring to... Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, it includes:

[0051] Feeding unit 1, circulating filtration unit 2, and discharging unit 4;

[0052] The feeding unit 1 is connected to the circulating filtration unit 2;

[0053] The discharge unit 4 is connected to the circulating filter unit 2;

[0054] The feeding unit 1 is provided with an oil slurry inlet;

[0055] The circulating filtration unit 2 includes at least one ultrafiltration membrane filter 22; an ultrafiltration membrane 221 is disposed inside the ultrafiltration membrane filter 22.

[0056] The discharge unit 4 is used to collect the filtered oil slurry.

[0057] At least one ultrafiltration membrane filter 22 is provided in the circulating filtration unit 2, and an ultrafiltration membrane 221 is provided inside the ultrafiltration membrane filter 22. During the filtration process, the oil slurry gradually permeates from the inner surface to the outer surface of the ultrafiltration membrane 221, which can effectively remove catalyst impurities in the oil slurry and improve the filtration effect.

[0058] In one embodiment, refer to Figure 1 and Figure 5 As shown, the ultrafiltration membrane filter 22 includes: a first ultrafiltration membrane filter and a second ultrafiltration membrane filter; the first ultrafiltration membrane filter and the second ultrafiltration membrane filter are connected by a connecting pipe 25; the first ultrafiltration membrane filter is also connected to the discharge unit 4; the second ultrafiltration membrane filter is also connected to the discharge unit 4.

[0059] In one embodiment, the pore size range of the ultrafiltration membrane 221 in the ultrafiltration membrane filter 22 is, for example, 10 nm to 1.25 μm. By determining the pore size of the ultrafiltration membrane 221, large particles of impurities in the oil phase material can be effectively trapped, preventing them from entering the ultrafiltration membrane filter 22 through the filter pores and contaminating the membrane tube.

[0060] In one embodiment, the axial direction of the ultrafiltration membrane 221 forms an acute angle with the flow direction of the oil slurry to be filtered. By designing the axial direction of the ultrafiltration membrane 221 at an acute angle to the flow direction of the oil slurry, the direct scouring of the surface of the ultrafiltration membrane 221 by the pumped oil slurry can be avoided, thus preventing the service life of the ultrafiltration membrane 221 from being affected. Furthermore, this can be combined with a cross-flow filtration method, allowing the high-speed oil slurry feedstock to scouring the membrane surface as it flows over the membrane tube, preventing the deposition of filter cake on the membrane surface and effectively extending the service life of the ultrafiltration membrane 221.

[0061] In one embodiment, the ultrafiltration membrane 221 in the ultrafiltration membrane filter 22 is made of ceramic material. By using ceramic, a high-temperature resistant material, in conjunction with other high-temperature resistant equipment in the purification device, the actual operating temperature of the purification device can reach 210-260°C, thereby reducing the viscosity of the oil slurry, decreasing the resistance during the oil slurry flow, and thus improving the oil slurry filtration effect.

[0062] In one embodiment, refer to Figure 1 The purification equipment also includes a cleaning unit 3; the cleaning unit 3 is equipped with a cleaning inlet and a soft water inlet.

[0063] In one embodiment, refer to Figure 1, Figure 2 , Figure 4 The circulating filtration unit 2 further includes: a circulating pump 21, a first circulating pipe 23, and a second circulating pipe 24; the circulating pump 21, the first circulating pipe 23, the first ultrafiltration membrane filter, the connecting pipe 25, the second ultrafiltration membrane filter, and the second circulating pipe 24 are connected in sequence; the second circulating pipe 24 is connected to the circulating pump 21; the circulating pump 21 is also connected to the feeding unit 1 and the cleaning unit 3, for pumping in the oil slurry to be filtered and the cleaning agent, respectively.

[0064] In one embodiment, the feeding unit 1 is further provided with a diesel inlet and a nitrogen inlet.

[0065] In one embodiment, the discharge unit 4 is provided with a clean oil outlet and a concentrated oil outlet.

[0066] In one embodiment, the discharge unit 4 is also provided with a sludge and oil outlet.

[0067] In one embodiment, refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5In the circulating filtration unit 2, the first circulating pipe 23 is connected to the feeding unit 1; the first circulating pipe 23 is connected to the cleaning unit 3; the second circulating pipe 24 is connected to the feeding unit 1; the second circulating pipe 24 is connected to the cleaning unit 3; the second circulating pipe 24 is connected to the discharging unit 4; and the connecting pipe 25 is connected to the feeding unit 1. Specifically, for example, the diesel-containing slurry to be filtered is conveyed to the circulation pump 21 through the feeding unit 1. The circulation pump 21 then guides the slurry through the first circulation pipe 23 into the first ultrafiltration membrane filter. The first ultrafiltration membrane filter is equipped with a sludge pipe and a clean oil pipe. The filtered sludge flows through the sludge pipe to the discharge unit 4, and the filtered clean slurry also flows into the discharge unit 4 through the clean oil pipe. The remaining slurry that has not passed through the first ultrafiltration membrane filter enters the second ultrafiltration membrane filter through the connecting pipe 25. Similarly, the sludge after passing through the second ultrafiltration membrane filter flows through the sludge pipe to the discharge unit 4, and the filtered clean slurry also flows into the discharge unit 4 through the clean oil pipe. The remaining slurry that has not passed through the second ultrafiltration membrane filter returns to the circulation pump 21 through the second circulation pipe 24, thus achieving repeated circulation filtration of the slurry. During prolonged use, the first and second ultrafiltration membrane filters may become clogged. In this case, the cleaning unit 3 can be used to clean the first and second ultrafiltration membrane filters. For example, the cleaning agent is pumped into the circulating filter unit 2 by the circulating pump 21 for circulating cleaning. At the same time, the cleaning agent can be recovered through the first ultrafiltration membrane filter and the second ultrafiltration membrane filter. The cleaned wastewater is output through the first ultrafiltration membrane filter, the second ultrafiltration membrane filter, the first circulating pipe 23 and the second circulating pipe 24 to complete the cleaning of the ultrafiltration membrane filter 22.

[0068] In one embodiment, refer to Figure 1 , Figure 4 , Figure 5 and Figure 6 The feeding unit 1 is also equipped with a feeding filter 12, a first conveying pipe 15, a second conveying pipe 16, a third conveying pipe 17 and a fourth conveying pipe 18; an oil slurry valve 11 is installed on the oil slurry inlet, a diesel valve 13 is installed on the diesel inlet, and a nitrogen valve 14 is installed on the nitrogen inlet.

[0069] In one embodiment, refer to Figure 1 , Figure 4 , Figure 5 and Figure 6The feed filter 12 includes a first feed filter and a second feed filter; the slurry valve 11 is connected to the first feed filter, the second feed filter is connected to the first conveying pipe 15, the first conveying pipe 15 is connected to the second circulation pipe 24; the first conveying pipe 15 is connected to the cleaning unit 3; the first conveying pipe 15 is connected to the second conveying pipe 16, the second conveying pipe 16 is connected to the diesel valve 13; the second conveying pipe 16 is connected to the third conveying pipe 17; the third conveying pipe 17 is connected to the discharge unit 4; the third conveying pipe 17 is connected to the nitrogen valve 14 via a pipe; the nitrogen valve 14 is connected to the discharge unit 4; the fourth conveying pipe 18 is connected to the nitrogen valve 14 via a pipe; and the second conveying pipe 16 is connected to the circulation pump 21. Specifically, for example, by opening the slurry valve 11, the slurry to be filtered is initially filtered through the first and second feed filters, and then enters the circulation pump 21 through the first delivery pipe 15. Simultaneously, the diesel valve 13 is opened, and diesel fuel enters the circulation pump 21 through the second delivery pipe 16, mixing the diesel fuel with the slurry to reduce its viscosity and increase its driving force, thereby enhancing the filtration effect of the slurry after passing through the ultrafiltration membrane filter 22. By opening the nitrogen valve 14, nitrogen enters the first circulation pipe 23 through the fourth delivery pipe 18, thus controlling the pressure of the slurry in the circulation filtration unit 2. After filtration by the ultrafiltration membrane filter 22, a portion of the clean slurry and diesel fuel flows out together, while the other portion flows into the third delivery pipe 17. Nitrogen enters the third delivery pipe 17, causing the clean slurry to flow back to the second delivery pipe 16, thus continuing the circulation filtration. The series connection between these pipes ensures the flow rate of the slurry, increases the membrane area, and thus ensures the efficiency of the slurry filtration.

[0070] In one embodiment, refer to Figure 1 , Figure 4 and Figure 6The discharge unit 4 includes: a clean oil valve 41, a concentrated oil valve 42, a sludge valve 43, a first discharge pipe 44, a second discharge pipe 45, and a third discharge pipe 46; the clean oil valve 41 is connected to the first discharge pipe 44; the first discharge pipe 44 is connected to the third conveying pipe 17; the first discharge pipe 44 is connected to the ultrafiltration membrane filter 22; the first discharge pipe 44 is fixedly connected to the cleaning unit 3; the concentrated oil valve 42 is connected to the second discharge pipe 45; the second discharge pipe 45 is connected to the second circulation pipe 24; the sludge valve 43 is connected to the third discharge pipe 46; the third discharge pipe 46 is connected to the ultrafiltration membrane filter 22; the third discharge pipe 46 is connected to the nitrogen valve 14; and the third discharge pipe 46 is connected to the cleaning unit 3. Specifically, for example, the clean oil slurry flowing out is piped to the first discharge pipe 44, and the clean oil valve 41 is opened to allow the clean oil slurry to flow out; the first discharge pipe 44 is connected to the third conveying pipe 17, so that a portion of the clean oil slurry flows to the second conveying pipe 16 and returns to the circulating pump 21 along with the oil slurry to continue circulating; the first discharge pipe 44 is connected to the cleaning unit 3, so that the filtered cleaning agent can return to the cleaning unit 3 for recycling; the third discharge pipe 46 is connected to the cleaning unit 3, so that the wastewater generated during cleaning can be discharged; the second discharge pipe 45 is connected to the second circulating pipe 24, so that the concentrated oil slurry generated after oil slurry filtration is discharged through the second discharge unit 4 and the concentrated oil valve 42.

[0071] In one embodiment, refer to Figure 1 , Figure 4 , Figure 7The cleaning unit 3 also includes a soft water valve 31, a cleaning fluid storage tank 32, a delivery pump 33, a wastewater valve 34, a first cleaning pipe 35, a second cleaning pipe 36, a third cleaning pipe 37, and a fourth cleaning pipe 38. The soft water valve 31 is connected to the first cleaning pipe 35; the first cleaning pipe 35 is connected to the second cleaning pipe 36; the second cleaning pipe 36 is connected to the first delivery pipe 15; the second cleaning pipe 36 is connected to the circulation pump 21; the delivery pump 33 is connected to the second cleaning pipe 36; the cleaning fluid storage tank 32 is connected to the delivery pump 33; the third cleaning pipe 37 is connected to the cleaning fluid storage tank 32; the third cleaning pipe 37 is connected to the first discharge pipe 44; the wastewater valve 34 is connected to the fourth cleaning pipe 38; the fourth cleaning pipe 38 is connected to the first circulation pipe 23; the fourth cleaning pipe 38 is connected to the second circulation pipe 24; and the fourth cleaning pipe 38 is connected to the third discharge pipe 46. Specifically, for example, by opening the soft water valve 31, soft water flows through the first cleaning pipe 35 and the second cleaning pipe 36. Simultaneously, the cleaning solution in the cleaning solution storage tank 32 is pumped into the second cleaning pipe 36 by the delivery pump 33, mixing the cleaning solution and the softened water to form a cleaning agent. The cleaning agent enters the circulation pump 21 through the first delivery pipe 15, and the pressure provided by the circulation pump 21 cleans the ultrafiltration membrane filter 22. After being filtered through the ultrafiltration membrane 221, the cleaning agent flows through the first discharge pipe 44 to the third cleaning pipe 37 and back to the cleaning solution storage tank 32. Wastewater generated during the cleaning process flows through the fourth cleaning pipe 38, exiting from the first circulation pipe 23 and the second circulation pipe 24, and is discharged through the wastewater valve 34.

[0072] To facilitate understanding of the technical solution by those skilled in the art, the working principle of the oil slurry purification equipment provided by this utility model is generally described as follows:

[0073] By opening the slurry valve 11, the slurry to be filtered is initially filtered by the feed filter 12 and enters the first conveying pipe 15. Simultaneously, the diesel valve 13 is opened, allowing diesel fuel to flow into the first conveying pipe 15 through the second conveying pipe 16 and mix with the slurry to reduce its viscosity. Then, it enters the circulation pump 21 and, after passing through the first circulation pipe 23, enters the first ultrafiltration membrane filter 22, where the ultrafiltration membrane 221 filters out the slurry. The filtered clean slurry is discharged through the first discharge pipe 44 via the clean oil valve 41, and the filtered dirty oil is discharged through the third discharge pipe 46 via the dirty oil valve 43. Through the connecting pipe 25, the slurry that has not passed through the first ultrafiltration membrane filter enters the second ultrafiltration membrane filter 22 for further filtration of both clean and dirty oil. The slurry that has not passed through the second ultrafiltration membrane filter returns to the circulation pump 21 through the second circulation pipe 24 for continued circulation and filtration. After filtration is completed, the oil slurry enters the discharge unit 4 after passing through the second circulation pipe 24 and the second discharge pipe 45, thereby discharging the concentrated oil slurry through the concentrated oil valve 42, and finally completing the purification of the oil slurry.

[0074] When cleaning is required, soft water is introduced through the soft water valve 31 via the first cleaning pipe 35 into the second cleaning pipe 36. Simultaneously, the cleaning solution in the cleaning solution storage tank 32 is pumped into the second cleaning pipe 36 via the delivery pump 33, mixing the cleaning solution and soft water to form a cleaning agent. The cleaning agent then enters the circulation pump 21 via the first delivery pipe 15. The pressure provided by the circulation pump 21 cleans the ultrafiltration membrane filter 22. The cleaning solution is filtered through the ultrafiltration membrane 221 and discharged. It then flows through the first discharge pipe 44 to the third cleaning pipe 37, returning to the cleaning solution storage tank 32. Wastewater generated during cleaning flows out through the fourth cleaning pipe 38 from the first circulation pipe 23 and the second circulation pipe 24. The wastewater discharge is controlled by the wastewater valve 34, thus completing the cleaning of the purification equipment.

[0075] The beneficial effects of this utility model include at least the following:

[0076] The oil slurry ultrafiltration purification equipment provided in this embodiment includes a feeding unit 1, a circulating filtration unit 2, and a discharging unit 4. The circulating filtration unit 2 is equipped with at least one ultrafiltration membrane filter 22, and the ultrafiltration membrane filter 22 contains an ultrafiltration membrane 221. During the filtration process, the oil slurry gradually permeates from the inner surface to the outer surface of the ultrafiltration membrane 221, effectively removing catalyst impurities from the oil slurry and improving the filtration effect.

[0077] Furthermore, the pore size range of the ultrafiltration membrane 221 in the ultrafiltration membrane filter 22 can effectively trap catalyst particles in the oil slurry, thereby improving the filtration accuracy of the oil slurry.

[0078] Furthermore, the axial direction of the ultrafiltration membrane 221 is at an acute angle to the flow direction of the oil slurry to be filtered, which can avoid the direct scouring effect of the high-speed flowing oil slurry on the ultrafiltration membrane 221 and improve the service life of the ultrafiltration membrane 221.

[0079] Furthermore, the ultrafiltration membrane 221 is made of high-temperature resistant ceramic material, which can maintain the temperature of the oil slurry to be filtered at 210–260°C. Simultaneously, the feed unit 1 is equipped with a diesel inlet, allowing diesel fuel to be introduced and mixed with the oil slurry. This reduces the viscosity of the oil slurry, decreases the resistance to its flow within the equipment, and thus improves the filtration effect.

[0080] Furthermore, the circulating filtration unit 2 is equipped with a circulating pump 21 and multiple circulating pipes, which allows the oil slurry to be filtered to be pressurized by the circulating pump 21 and continuously circulated and filtered under pressure, thereby improving the filtration effect of the oil slurry.

[0081] Obviously, those skilled in the art can make various changes to this utility model without departing from its spirit and scope. Therefore, if these modifications fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications.

Claims

1. An oil slurry ultrafiltration purification apparatus characterized by comprising: include: Feeding unit, circulating filtration unit, and discharging unit; The feeding unit is connected to the circulating filtration unit; The discharge unit is connected to the circulating filtration unit; The feeding unit is equipped with an oil slurry inlet; The circulating filtration unit includes at least one ultrafiltration membrane filter; the ultrafiltration membrane filter is provided with an ultrafiltration membrane. The discharge unit is used to collect the filtered oil slurry.

2. The purification apparatus of claim 1, wherein The ultrafiltration membrane filter includes: a first ultrafiltration membrane filter and a second ultrafiltration membrane filter; The first ultrafiltration membrane filter and the second ultrafiltration membrane filter are connected by a connecting pipe; The first ultrafiltration membrane filter is also connected to the discharge unit; The second ultrafiltration membrane filter is also connected to the discharge unit.

3. The purification apparatus of claim 2, wherein The pore size of the ultrafiltration membrane in the ultrafiltration membrane filter ranges from 10 nm to 1.25 μm.

4. The purification apparatus of claim 3, wherein The axial direction of the ultrafiltration membrane forms an acute angle with the inflow direction of the oil slurry to be filtered.

5. The purification apparatus of claim 4, wherein The ultrafiltration membrane is made of ceramic material.

6. The purification apparatus of claim 5, wherein Also includes: Cleaning unit; The cleaning unit is equipped with a cleaning inlet and a soft water inlet.

7. The purification apparatus of claim 6, wherein The circulating filtration unit further includes: a circulating pump, a first circulating pipe, and a second circulating pipe; The circulating pump, the first circulating pipeline, the first ultrafiltration membrane filter, the connecting pipeline, the second ultrafiltration membrane filter, and the second circulating pipeline are connected in sequence. The second circulation pipe is connected to the circulation pump; The circulating pump is also connected to the feeding unit and the cleaning unit.

8. The purification apparatus of claim 7, wherein The feeding unit is also equipped with a diesel inlet and a nitrogen inlet.

9. The purification apparatus of claim 8, wherein The discharge unit is equipped with a clean oil outlet and a concentrated oil outlet.

10. The purification apparatus of claim 9, wherein The discharge unit is also equipped with a waste oil outlet.

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