A catalytic cracking-catalytic oil slurry directional treatment combined device

Abstract

This invention discloses a combined catalytic cracking-catalytic slurry directional treatment device, belonging to the field of petroleum refining and chemical solid-liquid separation, including a shell; the shell is internally fixed with a first partition and a second partition, which divide the interior of the shell into three independent chambers: upper, middle, and lower. The first and second partitions are respectively provided with a first through hole and a second through hole. A first partition and a swirl section are arranged between the middle and lower chambers. The catalytic slurry first undergoes centrifugal pre-sedimentation in the lower chamber, so that the highly abrasive large particles of catalyst are preferentially discharged from the bottom discharge port, reducing the mechanical wear of the subsequent filtration structure. The overflowing slurry containing fine particles enters the middle chamber and is guided by multiple spiral blades provided on the adjacent walls of the guide section and the filter section, so that the slurry generates swirling flow and forms a continuous fluid shear force on the outer surface of the filter screen, dynamically stripping away the colloids and asphaltenes that may be deposited on the microporous surface.

Description

Technical Field

[0001] This invention relates to the fields of petroleum refining and chemical solid-liquid separation, and more specifically, to a combined catalytic cracking-catalytic slurry directional treatment unit. Background Technology

[0002] Catalytic cracking is one of the core heavy oil conversion processes in the petroleum refining industry. Under the action of catalysts and high temperatures, it converts heavy distillate oils, residue oils and other large molecular hydrocarbons into high-value light oil products and olefins.

[0003] Catalytic slurry is the heavy residual oil discharged from the bottom of the fractionation tower when the products of catalytic cracking reaction are fractionated. This slurry contains a large amount of polycyclic aromatic hydrocarbons, high-viscosity gums and asphaltenes, and carries a large number of fine catalyst solid particles generated during the reaction due to wear or washing.

[0004] Targeted treatment refers to a solid-liquid separation method that uses a combination of centrifugal sedimentation, cyclone shearing, and physical interception to remove large-particle catalysts, ultrafine dust, and asphaltene from catalytic slurry based on their different physical properties.

[0005] In the operation of catalytic cracking units, catalytic slurry typically contains a high concentration of solid catalyst particles. These particles can easily lead to wear on subsequent heavy oil processing equipment and may also accelerate catalyst poisoning, limiting the industrial application of slurry as a high-quality chemical feedstock. Therefore, solid-liquid separation of the slurry is necessary. Commonly used purification technologies include gravity sedimentation, hydrocyclone separation, or mechanical filtration. However, existing filtration and purification equipment has a prominent technical problem in actual operation: because catalytic slurry is rich in viscous colloids, asphaltenes, and other large molecular organic matter, when the slurry mixed with fine catalyst particles flows through a static filter screen for solid-liquid separation, the viscous substances easily adhere to the outer surface of the filter screen and accumulate with the fine particles, forming a dense and difficult-to-remove filter cake layer. This causes the filter screen pores to harden and become deeply clogged, increasing filtration resistance and leading to a decrease in unit filtration efficiency. This necessitates more frequent shutdowns for backflushing or chemical cleaning, affecting the continuous operation of the unit. Summary of the Invention

[0006] To address the problems existing in the prior art, the purpose of this invention is to provide a combined catalytic cracking-catalytic slurry treatment device.

[0007] To solve the above problems, the present invention adopts the following technical solution.

[0008] A combined catalytic cracking-catalytic slurry treatment unit includes a shell; The shell is fixed with a first partition and a second partition, which divide the shell into three independent chambers: upper, middle and lower. The first partition and the second partition are respectively provided with a first through hole and a second through hole. A vortex section is fixed in the lower chamber, and a discharge port connected to the bottom outlet of the vortex section is opened at the lower end of the shell. An inlet connected to the input end of the vortex section is opened on the outside of the shell. The overflow port of the vortex section is connected to the first through hole. The middle chamber is provided with a flow guide and a filter located inside the flow guide. The filter is fixed to the lower end of the second partition. Multiple spiral blades are evenly provided on the wall surface adjacent to the flow guide and the filter. The outer side of the shell has a liquid outlet that communicates with the upper chamber.

[0009] Furthermore, the filter unit includes an upper mounting base fixed to the lower end of the second partition, a plurality of brackets fixed to the lower end of the upper mounting base, a lower mounting base fixed to the lower end of the plurality of brackets, and a filter screen sleeved on the outside of the plurality of brackets, wherein the upper end and the lower end of the filter screen are respectively sealed and fixed to the upper mounting base and the lower mounting base.

[0010] Furthermore, it also includes a backwashing assembly, which includes a column located inside the housing, a nozzle opened outside the column, an inner flow channel opened inside the column and connected to the nozzle, a rotary joint fixed to the upper end of the housing and with its inner tube passing through the housing and fixedly inserted into the column, and a drive unit disposed inside the housing for driving the column to rotate. The inner tube of the rotary joint is connected to the inner flow channel. The upper end of the column is rotatably connected to the inner wall of the upper chamber, and the lower end passes through the second through hole into the filter screen and is rotatably connected to the upper end of the lower mounting base.

[0011] Furthermore, it also includes multiple elastic sheets located inside the filter screen, with each elastic sheet located between two adjacent supports and its two sides connected to the adjacent supports; multiple material-pulling pieces are also fixed to the outside of the column, and when the multiple material-pulling pieces rotate with the column and come into contact with the elastic sheets, they cause the elastic sheets to deform and move toward the inner wall of the filter screen.

[0012] Furthermore, the drive unit includes a second rotor rotatably connected to the inner wall of the upper cavity, a first rotor rotatably connected to the inside of the housing, and a gear transmission unit disposed inside the housing for driving the first rotor to rotate. A first motor is fixedly connected to the upper end of the housing, and the output shaft of the first motor is connected to the gear transmission unit. The first rotor and the second rotor achieve synchronous rotation through magnetic coupling transmission.

[0013] Furthermore, the flow guiding part includes an outer cover whose upper end is fixedly connected to the lower end of the second partition and whose lower end is fixedly connected to the upper end of the first partition, a flow guiding hood rotatably connected to the outer cover and sleeved on the outer periphery of the filter screen, and a plurality of spiral blades are disposed on the inner wall surface of the flow guiding hood.

[0014] Furthermore, the second partition is internally equipped with a flow-aiding assembly, which includes a worm gear rotatably connected inside the second partition and a worm gear driven by the worm gear, a third rotor rotatably connected inside the second partition and fixed to the lower end of the worm gear, a fourth rotor rotatably connected to the lower end of the second partition, the upper end of the flow guide shroud being fixed to the lower end of the fourth rotor, a second motor being fixed to the outside of the housing, and the output shaft of the second motor penetrating into the interior of the second partition and connected to the worm gear; the third rotor and the fourth rotor achieve synchronous rotation through magnetic coupling transmission.

[0015] Furthermore, multiple first conductive elements are fixedly connected to the interior of the multiple brackets, and a second conductive element is fixedly connected to the interior of the second partition, with the upper ends of the multiple first conductive elements fixedly connected to the lower ends of the second conductive elements; an ultrasonic transducer is fixedly connected to the exterior of the housing; a third conductive element is also fixedly connected to the interior of the second partition, with one end of the third conductive element fixedly connected to the outer periphery of the second conductive element, and the other end penetrating through the second partition and the housing and connected to the output end of the ultrasonic transducer.

[0016] Furthermore, the third conductive element is located between the third rotor and the fourth rotor, and the third conductive element is made of a non-magnetic material.

[0017] Furthermore, it also includes multiple conductive meshes located inside the filter screen, with each conductive mesh having its two sides fixed to adjacent supports, and the outer wall surface of the conductive mesh fitting against the inner wall surface of the filter screen, the conductive mesh being located between the elastic sheet and the filter screen.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows: (1) The present invention provides a first partition and a swirling section between the middle and lower chambers. The catalytic slurry is first centrifuged and pre-sedied in the lower chamber, so that the large particles of catalyst with strong abrasiveness are preferentially discharged from the bottom discharge port, reducing the mechanical wear of the subsequent filtration structure. After the overflowing slurry containing fine particles enters the middle chamber, it is guided by multiple spiral blades provided on the adjacent wall of the guide section and the filter section, so that the slurry generates swirling flow and forms a continuous fluid shear force on the outer surface of the filter screen, which dynamically peels off the colloids and asphalt that may be deposited on the microporous surface, which helps to extend the filtration cycle of the filter screen and reduce the frequent caking and accumulation on the outer surface of the filter screen.

[0019] (2) This invention incorporates multiple elastic plates inside the filter screen, with a first motor magnetically driving the column to rotate. When the rotating feed plate contacts and compresses the elastic plate, causing deformation, the elastic plate moves towards the inner wall of the filter screen, compressing the volume of the cavity between the filter screen and the elastic plate. The liquid inside the cavity, under pressure, generates a local pressure head within a short time and is discharged outwards through the micropores of the filter screen. This achieves dynamic reverse self-cleaning of the filter screen pores without interrupting the main filtration process, thus reducing the risk of clogging.

[0020] (3) In this invention, a second motor, in conjunction with a worm gear transmission, drives the flow guide shroud surrounding the filter screen to rotate via magnetic coupling, thereby causing the spiral blades on the inner wall of the flow guide shroud to rotate synchronously. This design is beneficial for actively adjusting and enhancing the shear flow field of the oil slurry flowing through the flow section, improving the dynamic shearing and peeling effect of the fluid on the filter screen surface, and is beneficial for handling oil slurry under different viscosity conditions.

[0021] (4) The present invention inputs high-frequency vibration through an external ultrasonic transducer, which is transmitted to the first conductor fixed inside the support through the third and second conductors. The high-frequency micro-vibration acts on the filter screen and the conductor screen, causing the material attached to the inside and surface of the filter screen to loosen and peel off. In response to the extreme clogging problem that conventional single backflushing is very easy to fail under some inferior heavy oil deep processing conditions, this device can adapt to the processing of special oil slurry with high scaling rate by integrating the high-frequency peeling of ultrasonic waves, the active shearing of spiral blades and the mechanical extrusion of elastic plates. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the discharge port structure of the present invention; Figure 3 This is a cross-sectional view of the present invention; Figure 4 This is a schematic diagram of the filter section and the first conductive element of the present invention; Figure 5 This is a schematic diagram of the filter screen, elastic sheet, and conductive mesh structure of the present invention; Figure 6 This is a schematic diagram of the backwashing assembly structure of the present invention; Figure 7 This is a schematic diagram showing the positional relationship between the feed sheet and the elastic sheet of the present invention; Figure 8 This is a schematic diagram of the structure of the present invention without the shell; Figure 9 This is a schematic diagram of the flow-aiding component structure of the present invention; Figure 10 This is a schematic diagram of the second conductive element, the third conductive element, and the ultrasonic transducer of the present invention; Figure 11 This is a cross-sectional view of the flow guide, first baffle, second baffle, and filter section of the present invention.

[0023] Explanation of the labels in the diagram: 1. Housing; 2. Liquid inlet; 3. Liquid outlet; 4. Discharge outlet; 5. Swirl section; 6. Filter section; 61. Upper mounting base; 62. Bracket; 63. Lower mounting base; 64. Filter screen; 65. Elastic sheet; 7. Flow guide section; 71. Outer cover; 72. Flow guide cover; 8. Spiral blade; 9. Backwash assembly; 91. Rotary joint; 92. Column; 93. Nozzle; 94. Material feeding plate; 95. First motor; 96. Gear Transmission unit; 97. First rotor; 98. Second rotor; 10. Flow aid assembly; 101. Second motor; 102. Worm; 103. Worm wheel; 104. Third rotor; 105. Fourth rotor; 11. First partition; 12. First through hole; 13. Second partition; 14. Second through hole; 15. First conductive element; 16. Conductive mesh; 17. Second conductive element; 18. Third conductive element; 19. Ultrasonic transducer. Detailed Implementation

[0024] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0025] Please see Figures 1 to 11 A combined catalytic cracking-catalytic slurry treatment unit includes a shell 1; The housing 1 is fixed with a first partition 11 and a second partition 13, and the first partition 11 and the second partition 13 divide the interior of the housing 1 into three independent chambers: upper, middle and lower. The first partition 11 and the second partition 13 are respectively provided with a first through hole 12 and a second through hole 14. The lower chamber is fixed with a swirl section 5, and the lower end of the housing 1 is provided with a discharge port 4 that is connected to the bottom outlet of the swirl section 5. The outside of the housing 1 is provided with a liquid inlet 2 that is connected to the input end of the swirl section 5. The overflow port of the swirl section 5 is connected to the first through hole 12. The middle chamber is provided with a flow guide 7 and a filter 6 located inside the flow guide 7. The filter 6 is fixed to the lower end of the second partition 13. Multiple spiral blades 8 are evenly provided on the wall surface adjacent to the flow guide 7 and the filter 6. The outer side of the housing 1 has a liquid outlet 3 that communicates with the upper chamber.

[0026] The filter unit 6 includes an upper mounting base 61 fixed to the lower end of the second partition plate 13, a plurality of brackets 62 fixed to the lower end of the upper mounting base 61, a lower mounting base 63 fixed to the lower end of the plurality of brackets 62, and a filter screen 64 sleeved on the outside of the plurality of brackets 62, wherein the upper end and the lower end of the filter screen 64 are respectively sealed and fixed to the upper mounting base 61 and the lower mounting base 63.

[0027] It also includes a backwashing assembly 9, which includes a column 92 located inside the housing 1, a nozzle 93 opened outside the column 92, an inner flow channel opened inside the column 92 and connected to the nozzle 93, a rotary joint 91 fixed to the upper end of the housing 1 and with its inner tube passing through the housing 1 and fixedly inserted into the column 92, and a drive part disposed inside the housing 1 for driving the column 92 to rotate. The inner tube of the rotary joint 91 is connected to the inner flow channel. The upper end of the column 92 is rotatably connected to the inner wall of the upper chamber, and the lower end passes through the second through hole 14 into the filter screen 64 and is rotatably connected to the upper end of the lower mounting base 63.

[0028] Combining the above structure, the catalytic slurry enters tangentially into the vortex section 5 from the inlet 2. Centrifugal force pre-sediments large particles settle to the bottom outlet and are discharged from the outlet 4. The slurry containing fine particles enters the guide section 7 and the filter screen 64 through the first through-hole 12. After being guided by the spiral blades 8, the swirling liquid generates continuous fluid shear force on the outer surface of the filter screen 64, dynamically stripping away any colloids and asphalt that may deposit on the microporous surface, extending the effective filtration time of the filter screen 64 and preventing frequent accumulation and caking on its exterior. The filter screen 64 is a hollow tube made of porous stainless steel powder or metal wire mesh sintered at high temperature. The filter screen 64 can also adopt an asymmetric structure design with an outer layer of thin micropores (e.g., 0.5 μm) and an inner layer of large pores (e.g., 20 μm). Solid particles are intercepted on the surface and dynamically stripped away, effectively eliminating deep clogging.

[0029] After passing through the filter screen 64, the liquid enters the upper chamber through the second through hole 14 and exits through the outlet 3. The input end of the rotary joint 91 is connected to an external air supply pipe or liquid supply pipe. By periodically backflushing the filter screen 64, it helps to remove the filter cake from the outer wall of the filter screen 64.

[0030] like Figures 4 to 7As shown, the filter screen 64 also includes multiple elastic sheets 65 located inside it. Each elastic sheet 65 is located between two adjacent supports 62, and both sides of the elastic sheet 65 are connected to the adjacent supports 62 (connected in a sealed and fixed direction). The upper and lower ends of the elastic sheet 65 abut against the upper mounting base 61 and the lower mounting base 63 respectively to achieve end-face sealing, so that the elastic sheet 65, the two side supports 62, and the upper and lower mounting bases together form a compression fluid cavity that is only open to the inner wall of the filter screen 64. Considering that catalytic cracking slurry is usually at a high temperature of 300℃~350℃ and has strong corrosiveness, in this embodiment, the elastic sheet 65 is made of a high-temperature resistant and high-elastic recovery non-magnetic alloy strip (such as titanium alloy strip or Inconel alloy) to ensure that thermal decay and fatigue fracture do not occur under high-frequency extrusion deformation.

[0031] Multiple material-pulling pieces 94 are also fixed to the outside of the column 92. When the multiple material-pulling pieces 94 rotate with the column 92 and come into contact with the elastic sheet 65, the elastic sheet 65 deforms and moves toward the inner wall of the filter screen 64.

[0032] The drive unit includes a second rotor 98 rotatably connected to the inner wall of the upper cavity, a first rotor 97 rotatably connected to the inside of the housing 1, and a gear transmission unit 96 disposed inside the housing 1 for driving the first rotor 97 to rotate. A first motor 95 is fixedly connected to the upper end of the housing 1, and the output shaft of the first motor 95 is connected to the gear transmission unit 96. The first rotor 97 and the second rotor 98 achieve synchronous rotation through magnetic coupling transmission.

[0033] The flow guide 7 includes an outer cover 71 whose upper end is fixed to the lower end of the second partition 13 and whose lower end is fixed to the upper end of the first partition 11, and a flow guide 72 which is rotatably connected inside the outer cover 71 and sleeved on the outer periphery of the filter screen 64. A plurality of spiral blades 8 are disposed on the inner wall surface of the flow guide 72.

[0034] When the above structure is adopted, the output shaft of the first motor 95 rotates and drives the first rotor 97 to rotate through the gear transmission part 96. The rotation of the first rotor 97 drives the second rotor 98 to rotate synchronously through magnetic coupling transmission. The rotation of the second rotor 98 drives the column 92 to rotate simultaneously. When the column 92 rotates, the nozzle 93 can rotate synchronously, thereby changing the back-blowing position of the filter screen 64 and improving the back-blowing effect.

[0035] During normal particle removal processing of the catalytic slurry, when the column 92 rotates but backflushing is not performed, the rotation of the column 92 also drives the material-pushing plate 94 to rotate. The rotating material-pushing plate 94 contacts the elastic plate 65 and squeezes the elastic plate 65, causing it to deform. The deformed elastic plate 65 moves towards the inner wall of the filter screen 64, and the volume of the cavity between the elastic plate 65 and the filter screen 64 is compressed instantaneously. The liquid in the cavity is pressurized, generating a local high-pressure head in a short time, forcibly pushing it outward through the micropores of the filter screen 64. This achieves dynamic cleaning of the pores of the filter screen 64 even when backflushing is not in operation, avoiding frequent accumulation and caking on the outside of the filter screen 64.

[0036] like Figure 5 , Figure 7 , Figure 9 As shown, a flow-aiding assembly 10 is provided inside the second partition 13. The flow-aiding assembly 10 includes a worm gear 103 rotatably connected inside the second partition 13 and a worm 102 drivenly connected to the worm gear 103, a third rotor 104 rotatably connected inside the second partition 13 and fixed to the lower end of the worm gear 103, a fourth rotor 105 rotatably connected to the lower end of the second partition 13, the upper end of the flow guide shroud 72 being fixedly connected to the lower end of the fourth rotor 105, a second motor 101 being fixedly connected to the outside of the housing 1, and the output shaft of the second motor 101 penetrating into the interior of the second partition 13 and connected to the worm 102; the third rotor 104 and the fourth rotor 105 achieve synchronous rotation through magnetic coupling transmission.

[0037] By adopting the above technical solution, the second motor 101 can drive the worm gear 102 to rotate, and the rotation of the worm gear 102 can drive the worm wheel 103 and the third rotor 104 to rotate. The third rotor 104 and the fourth rotor 105 can rotate synchronously through magnetic coupling transmission. The rotation of the fourth rotor 105 can drive the guide shroud 72 to rotate. When the guide shroud 72 rotates, it can also make the multiple spiral blades 8 on its inner wall rotate synchronously, further making the swirling flow generate stronger fluid shearing force on the outer surface of the filter screen 64, and improving the dynamic stripping efficiency of the swirling flow.

[0038] like Figure 4 , Figure 10 and Figure 11 As shown, multiple first conductive elements 15 are fixedly connected to the interior of the multiple brackets 62, and a second conductive element 17 is fixedly connected to the interior of the second partition 13, with the upper ends of the multiple first conductive elements 15 being fixedly connected to the lower ends of the second conductive elements 17; an ultrasonic transducer 19 is fixedly connected to the exterior of the housing 1; a third conductive element 18 is also fixedly connected to the interior of the second partition 13, with one end of the third conductive element 18 fixedly connected to the outer periphery of the second conductive element 17, and the other end penetrating through the second partition 13 and the housing 1 and connected to the output end of the ultrasonic transducer 19.

[0039] The third conductive element 18 is located within the magnetic coupling gap between the third rotor 104 and the fourth rotor 105. The third conductive element 18 is flat, and its upper and lower surfaces have non-contact movement gaps with the end faces of the adjacent third rotor 104 and fourth rotor 105. Furthermore, the third conductive element 18 is made of a non-magnetic material to avoid cutting magnetic field lines and generating eddy currents, thus achieving non-interference between static energy transfer and dynamic magnetic coupling transmission.

[0040] In this embodiment, to ensure the coordinated frequency of the multiple cleaning mechanisms, the swirling speed of the guide shroud 72 driven by the second motor 101 is set to [value missing] within the normal filtration cycle. The first motor 95 drives the feeding plate 94 to press the elastic plate 65 at a frequency controlled within the specified range. Simultaneously, the output micro-vibration frequency of the ultrasonic transducer 19 is set to... .

[0041] It also includes a plurality of conductive nets 16 located inside the filter screen 64. Each conductive net 16 is fixed to the adjacent support 62 on both sides, and the outer wall of the conductive net 16 is in contact with the inner wall of the filter screen 64. The conductive net 16 is located between the elastic sheet 65 and the filter screen 64.

[0042] By adopting the above technical solution, the ultrasonic transducer 19 outputs ultrasonic waves, which are transmitted to the first conductor 15 through the third conductor 18 and the second conductor 17. The high-frequency vibration acting on the first conductor 15 can drive the support 62, the conductive mesh 16 and the filter 64 to vibrate synchronously. Under the vibration, the filter 64 helps to loosen the material that has accumulated on it. Combined with the backflow and swirling treatment of the elastic sheet 65, the accumulation of material on the filter 64 is further prevented, the effective filtration time of the filter 64 is extended and the backflushing and cleaning frequency of the filter 64 is shortened.

[0043] Operating method: During operation, the catalytic slurry enters the vortex section 5 in the lower chamber of the shell 1 tangentially from the inlet 2. Large catalyst particles in the slurry undergo pre-settling under centrifugal force and are discharged from the discharge port 4 at the lower end of the shell 1. Meanwhile, the slurry containing fine particles overflows through the first through-hole 12 into the middle chamber. Under the guidance of the spiral blades 8 within the guide shroud 72 of the guide section 7, a spiral upward shearing vortex is formed on the outside of the filter screen 64 in the filter section 6. This shearing liquid dynamically peels away the gel and asphalt film on the outer surface of the filter screen 64. The purified liquid passes through the filter screen 64 and enters its interior, then flows upward through the second through-hole 14 into the upper chamber, finally discharging from the outlet 3. During this filtration process, the first motor 95 drives the first rotor 97 to rotate via the gear transmission section 96, and the first rotor 97 interacts with the second... The magnetic coupling drive between the two rotors 98 synchronously drives the second rotor 98 and the column 92 to rotate. This not only drives the nozzle 93 to rotate to adjust the backwashing position, but also drives the material feeding plate 94 to rotate circumferentially and alternately squeeze each elastic plate 65 to produce elastic deformation. This causes the material to move towards the inner wall of the filter screen 64 and instantaneously compress the fluid cavity between the filter screen 64 and the elastic plate 65. This generates local instantaneous reverse fluid impact inside and outside the micropores to assist in achieving micropore self-cleaning during the continuous filtration process. In addition, the second motor 101 drives the third rotor 104 to rotate through the worm gear 102 and worm wheel 103. The magnetic coupling drive between the third rotor 104 and the fourth rotor 105 synchronously drives the fourth rotor 105 and the flow guide shroud 72 to rotate, thereby driving the spiral blades 8 on its inner wall to rotate actively to adjust and enhance the shear flow field on the surface of the filter screen 64. Meanwhile, the ultrasonic transducer 19 transmits ultrasonic energy sequentially through the third conductor 18 and the second conductor 17 to the first conductor 15 fixed inside the support 62, thereby causing the support 62, the conductor mesh 16 and the filter mesh 64 to generate micro-vibrations, which is conducive to loosening the scale layer.

[0044] The above description is merely a preferred embodiment of the present invention; however, the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and its improved concepts, should be covered within the scope of protection of the present invention.

Claims

1. A combined catalytic cracking-catalytic slurry treatment unit, comprising a shell (1), characterized in that: The shell (1) is fixed with a first partition (11) and a second partition (13), and the first partition (11) and the second partition (13) divide the interior of the shell (1) into three independent chambers: upper, middle and lower. The first partition (11) and the second partition (13) are respectively provided with a first through hole (12) and a second through hole (14). The lower chamber is fixed with a vortex section (5), and the lower end of the shell (1) is provided with a discharge port (4) that is connected to the bottom outlet of the vortex section (5). The outside of the shell (1) is provided with a liquid inlet (2) that is connected to the input end of the vortex section (5). The overflow port of the vortex section (5) is connected to the first through hole (12). The middle chamber is provided with a flow guide (7) and a filter (6) located inside the flow guide (7). The filter (6) is fixed at the lower end of the second partition (13). Multiple spiral blades (8) are uniformly provided on the wall surface adjacent to the flow guide (7) and the filter (6). The shell (1) has an outlet (3) on its exterior that communicates with the upper chamber.

2. The catalytic cracking-catalytic slurry directional treatment combined unit according to claim 1, characterized in that: The filter section (6) includes an upper mounting base (61) fixed to the lower end of the second partition (13), a plurality of brackets (62) fixed to the lower end of the upper mounting base (61), a lower mounting base (63) fixed to the lower end of the plurality of brackets (62), and a filter screen (64) sleeved on the outside of the plurality of brackets (62), wherein the upper end and the lower end of the filter screen (64) are respectively sealed and fixed to the upper mounting base (61) and the lower mounting base (63).

3. The catalytic cracking-catalytic slurry directional treatment combined unit according to claim 2, characterized in that: It also includes a backwashing assembly (9), which includes a column (92) located inside the housing (1), a nozzle (93) opened outside the column (92), an inner flow channel opened inside the column (92) and connected to the nozzle (93), a rotary joint (91) fixed to the upper end of the housing (1) and with its inner tube passing through the housing (1) and fixedly inserted into the column (92), and a drive unit set inside the housing (1) for driving the column (92) to rotate. The inner tube of the rotary joint (91) is connected to the inner flow channel. The upper end of the column (92) is rotatably connected to the inner wall of the upper chamber, and the lower end passes through the second through hole (14) into the filter screen (64) and is rotatably connected to the upper end of the lower mounting base (63).

4. The catalytic cracking-catalytic slurry directional treatment combined unit according to claim 3, characterized in that: It also includes multiple elastic sheets (65) located inside the filter screen (64), with each elastic sheet (65) located between two adjacent supports (62), and the two sides of the elastic sheet (65) connected to the adjacent supports (62); multiple material-pulling pieces (94) are also fixed to the outside of the column (92), and when the multiple material-pulling pieces (94) rotate with the column (92) and come into contact with the elastic sheet (65), the elastic sheet (65) deforms and moves toward the inner wall of the filter screen (64).

5. The catalytic cracking-catalytic slurry directional treatment combined unit according to claim 3, characterized in that: The drive unit includes a second rotor (98) rotatably connected to the inner wall of the upper cavity, a first rotor (97) rotatably connected to the inside of the housing (1), and a gear transmission unit (96) disposed inside the housing (1) for driving the first rotor (97) to rotate. A first motor (95) is fixedly connected to the upper end of the housing (1), and the output shaft of the first motor (95) is connected to the gear transmission unit (96). The first rotor (97) and the second rotor (98) achieve synchronous rotation through magnetic coupling transmission.

6. The catalytic cracking-catalytic slurry directional treatment combined unit according to claim 1, characterized in that: The flow guide (7) includes an outer cover (71) whose upper end is fixed to the lower end of the second partition (13) and whose lower end is fixed to the upper end of the first partition (11), and a flow guide (72) which is rotatably connected inside the outer cover (71) and sleeved on the outer periphery of the filter screen (64). A plurality of spiral blades (8) are disposed on the inner wall surface of the flow guide (72).

7. The catalytic cracking-catalytic slurry directional treatment combined unit according to claim 6, characterized in that: The second partition (13) is provided with a flow aid assembly (10), which includes a worm gear (103) rotatably connected inside the second partition (13) and a worm (102) driven by the worm gear (103), a third rotor (104) rotatably connected inside the second partition (13) and fixed to the lower end of the worm gear (103), a fourth rotor (105) rotatably connected to the lower end of the second partition (13), the upper end of the flow guide (72) being fixed to the lower end of the fourth rotor (105), a second motor (101) being fixed to the outside of the housing (1), and the output shaft of the second motor (101) penetrating into the second partition (13) and connected to the worm (102); the third rotor (104) and the fourth rotor (105) rotate synchronously through magnetic coupling transmission.

8. The catalytic cracking-catalytic slurry directional treatment combined unit according to claim 2, characterized in that: Multiple first conductive elements (15) are fixedly connected to the interior of the multiple brackets (62), and a second conductive element (17) is fixedly connected to the interior of the second partition (13). The upper ends of the multiple first conductive elements (15) are fixedly connected to the lower ends of the second conductive elements (17). An ultrasonic transducer (19) is fixedly connected to the exterior of the housing (1). A third conductive element (18) is also fixedly connected to the interior of the second partition (13). One end of the third conductive element (18) is fixedly connected to the outer periphery of the second conductive element (17), and the other end passes through the second partition (13) and the housing (1) and is connected to the output end of the ultrasonic transducer (19).

9. The catalytic cracking-catalytic slurry directional treatment combined unit according to claim 8, characterized in that: The third conductive element (18) is located between the third rotor (104) and the fourth rotor (105), and the third conductive element (18) is made of non-magnetic material.

10. The catalytic cracking-catalytic slurry directional treatment combined unit according to claim 1, characterized in that: It also includes multiple conductive meshes (16) located inside the filter (64), with each of the two sides of a single conductive mesh (16) being fixed to an adjacent support (62), and the outer wall of the conductive mesh (16) being in contact with the inner wall of the filter (64), and the conductive mesh (16) being located between the elastic sheet (65) and the filter (64).

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