Catalytic cracking system riser reactor catalyst particle size distribution adjustment device

Abstract

This invention relates to the technical field of catalyst particle size distribution adjustment devices, specifically a catalyst particle size distribution adjustment device for a riser reactor in a catalytic cracking system. The device includes a conveying pipe, a conveying shaft, helical blades, a first driving mechanism, a vibration assembly, a feeding assembly, and a discharging assembly. The conveying shaft is rotatably mounted inside the conveying pipe, and helical blades are fixedly mounted on the outside of the conveying shaft and fitted inside the conveying pipe. This invention has a reasonable and compact structure. The vibration assembly facilitates the crushing of catalyst pieces poured into the hopper, preventing large catalyst fragments from entering the reaction device and avoiding incomplete reactions caused by uneven catalyst sizes. The discharging assembly ensures that the catalyst enters the reaction device at a uniform speed, preventing catalyst accumulation and its impact on reaction efficiency. This device indirectly improves the reaction efficiency of the catalyst within the reaction device, avoiding incomplete reactions or catalyst waste caused by uneven catalyst sizes.

Description

Technical Field

[0001] This invention relates to the field of catalyst particle size distribution adjustment equipment, specifically a catalyst particle size distribution adjustment device for a riser reactor in a catalytic cracking system. Background Technology

[0002] In the early stages of adding fresh catalyst to a catalytic cracking system, the catalyst particle size distribution is usually uniform. However, as the catalyst participates in the reaction and regeneration / coke burning process in the circulating fluidized bed, the powdered catalyst may agglomerate, causing the particles to become larger, or it may be broken by collision and wear, causing the particles to become smaller. This results in an uneven particle size distribution of the circulating catalyst within the system. Uneven catalyst particle size distribution can lead to uneven heat load because the different sizes of catalyst particles result in inconsistent heat conduction and cooling effects inside the reactor. This may cause some areas to be too hot while other areas are too cold, thus creating a temperature gradient and increasing the risk of thermal stress and thermal distortion of the catalyst. Summary of the Invention

[0003] This invention provides a catalyst particle size distribution adjustment device for a riser reactor in a catalytic cracking system, which overcomes the shortcomings of the prior art and can effectively solve the problem of uneven particle distribution caused by catalyst agglomeration in existing catalyst feeding devices.

[0004] The technical solution of the present invention is achieved through the following measures: a catalyst particle size distribution adjustment device for a riser reactor in a catalytic cracking system, comprising a conveying pipe, a conveying shaft, a spiral blade, a first driving mechanism, a vibration component, a feeding component, and a discharging component. A conveying shaft is rotatably installed inside the conveying pipe, and a spiral blade fitted inside the conveying pipe is fixedly installed on the outside of the conveying shaft. A first driving mechanism capable of driving the conveying shaft to rotate is fixedly installed at the left end of the conveying pipe. An inlet with internal and external communication is provided on the left side of the conveying pipe. An inlet pipe is fixedly installed on the outside of the left side of the conveying pipe corresponding to the inlet position. A vibration component and a feeding component are spaced apart inside the inlet pipe. The vibration component is used to vibrate the material inside the inlet pipe, and the feeding component is used to control the flow rate of the material inside the inlet. An outlet with internal and external communication is provided on the right side of the conveying pipe. An outlet pipe is fixedly installed on the outside of the right side of the conveying pipe corresponding to the outlet position. A discharging component is provided inside the outlet pipe to allow the material to fall evenly from the lower end of the outlet pipe.

[0005] The following are further optimizations and / or improvements to the above-mentioned technical solution: The aforementioned vibration assembly may include a filter screen, a guide plate, a second drive mechanism, a first eccentric connecting rod, a first connecting rod, a second connecting rod, and a third connecting rod. The lower end of the feed pipe is fixedly installed on the upper left side of the conveying pipe. A filter screen is slidably installed on the inner side of the upper part of the feed pipe. Below the filter screen, a guide plate is hinged to the inner left side of the feed pipe. At least one first connecting rod is spaced between the upper part of the guide plate and the lower part of the filter screen. A first fixing seat is hinged to the lower side of the first connecting rod, and the lower side of the first fixing seat is fixedly installed together with the upper side of the guide plate. A second fixing seat is hinged to the upper side of the first fixing seat, and the upper side of the second fixing seat is fixedly installed together with the lower side of the filter screen, corresponding to the lower part of the guide plate. A second drive mechanism is fixedly installed on the left side of the feed pipe at the position above the second drive mechanism. A first rotating shaft is rotatably installed on the left side of the feed pipe above the second drive mechanism. The rear end of the first rotating shaft is connected to the rear end of the output shaft of the second drive mechanism. A vibrating wheel is fixedly installed on the outer side of the front end of the first rotating shaft. A second connecting rod with a gap between its central axis and the central axis of the first rotating shaft is fixedly installed on the front end of the vibrating wheel. The front end of the second connecting rod is hinged to the first end of the first eccentric connecting rod. The second end of the first eccentric connecting rod is hinged to the first end of the third connecting rod. The second end of the third connecting rod passes through the left side wall of the feed pipe and is movably installed on the lower side of the guide plate.

[0006] The aforementioned feeding assembly may include a third drive mechanism, a second rotating shaft, a sleeve, a distributing mechanism, and a controller. A third drive mechanism is fixedly installed on the lower rear side of the feeding pipe corresponding to the position below the guide plate. A second rotating shaft is rotatably installed on the lower inner side of the feeding pipe, its rear end passing through the rear side of the feeding pipe and connected to the front end of the output shaft of the third drive mechanism. A sleeve is fixedly installed on the outer side of the second rotating shaft. Several distributing mechanisms are evenly distributed along the circumference of the outer side of the sleeve. Each distributing mechanism includes a connecting plate, a support plate, a cleaning rod, a stop block, a rotating pin, a baffle, and a pressure sensor. Several connecting plates are evenly distributed along the circumference of the outer side of the sleeve. In a clockwise direction, a support plate is arranged parallel to the rear of each connecting plate. A pressure sensor is located between the front of the support plate and the rear of the connecting plate. Two cleaning rods are spaced apart on the rear side of the support plate. A rotating pin is rotatably installed at the end of each cleaning rod away from the sleeve. The end of the rotating pin is fixedly installed together with the connecting plate. At least one stop is fixedly installed at a distance on the rear side of the support plate away from the sleeve at the position corresponding to the two rotating pins. A baffle is fixed on the side of the support plate away from the sleeve. The front side of the baffle extends to the outside of the connecting plate at the adjacent position. Each pressure sensor is connected to a controller, and the controller is connected to the third drive mechanism.

[0007] The side of the baffle away from the sleeve may be an inwardly opening arc surface, and the arc surface is coaxial with the central axis of the second rotating shaft.

[0008] The aforementioned discharge assembly may include a support frame, a valve core, and a lifting mechanism. The upper end of the discharge pipe is fixedly installed together with the lower right side of the conveying pipe. A drop pipe is fixedly installed at the lower end of the discharge pipe. The inner diameter of the upper end of the drop pipe is smaller than the inner diameter of the lower end of the discharge pipe. A transition section with a larger upper end and a smaller lower end is formed between the upper end of the drop pipe and the lower end of the discharge pipe. A support frame is fixedly installed on the inner side of the upper part of the drop pipe. A valve core is provided on the upper side of the support frame. The upper part of the valve core is a frustum shape with a smaller upper end and a larger lower end. The outer side of the lower part of the valve core is in sealed contact with the inner side of the upper end of the drop pipe. A lifting mechanism is provided in the center of the support frame, which enables the valve core to move up and down reciprocally.

[0009] The aforementioned lifting mechanism may include a third rotating shaft, a fixed plate, a fixed rod, a driving bevel gear, a driven bevel gear, a second eccentric connecting rod, a fourth connecting rod, a push plate, and a fourth drive mechanism. The upper end of the valve core has a transmission hole extending to the lower side of the support frame. A third rotating shaft capable of transmitting torque to the valve core and moving vertically relative to the valve core is installed within the transmission hole. A driving bevel gear is fixedly installed on the outer side of the lower end of the third rotating shaft corresponding to the lower end of the support frame. A fixed plate is located below the driving bevel gear. Several fixed rods are evenly distributed circumferentially on the outer side of the fixed plate, with their upper ends fixed to the corresponding positions on the lower side of the support frame. The lower end of the valve core has a downward-opening annular guide groove. Several fixed rods are evenly distributed circumferentially on the upper side of the fixed plate corresponding to the guide groove. Each shaft seat contains a rotatably mounted lifting shaft. A driven bevel gear, meshing with the driving bevel gear, is fixedly mounted on the outer side of the end of each lifting shaft near the lower end of the third rotating shaft. A lifting wheel is fixedly mounted on the outer side of the end of each lifting shaft away from the lower end of the third rotating shaft. A second eccentric connecting rod is fixedly mounted on the end face of the lifting wheel away from the lower end of the third rotating shaft. A gap is provided between the central axis of each second eccentric connecting rod and the corresponding lifting shaft. A vertically arranged fourth connecting rod is hinged to the end of each second eccentric connecting rod. A push plate is hinged to the upper end of each fourth connecting rod. The upper outer side of each push plate is slidably mounted in a guide groove. A fourth drive mechanism capable of driving the third rotating shaft to rotate is provided on the upper inner side of the discharge pipe.

[0010] The aforementioned fourth drive mechanism may include a drive motor, a transmission housing fixedly installed on the inner side of the upper part of the discharge pipe, a driven bevel gear fixedly installed after the upper end of the third rotating shaft passes through the inner side of the lower part of the transmission housing, a drive motor fixedly installed on the right side of the upper part of the discharge pipe, and an active bevel gear meshing with the driven bevel gear fixedly installed after the left end of the output shaft of the drive motor passes through the right side of the discharge pipe.

[0011] The left side of the guide plate can be tilted upward relative to the right side. The left side of the guide plate is provided with a downward-opening strip groove. A movable seat is slidably installed in the groove. The lower part of the movable seat is hinged to the second end of the third connecting rod.

[0012] A protective sleeve fitted onto the outside of the third connecting rod can be fixedly installed on the inner side of the aforementioned feed pipe.

[0013] This invention features a reasonable and compact structure. The vibration component facilitates the crushing of the catalyst poured into the hopper, preventing large pieces of catalyst from entering the reaction device and avoiding incomplete reactions caused by catalysts of varying sizes. The discharge component ensures that the catalyst enters the reaction device at a uniform speed, preventing catalyst accumulation and its impact on the reaction effect. This device can indirectly improve the reaction efficiency of the catalyst in the reaction device and avoid incomplete reactions or catalyst waste caused by catalysts of varying sizes. Attached Figure Description

[0014] Appendix Figure 1 These are schematic diagrams of the main cross-sectional structure of embodiments one to nine of the present invention.

[0015] Appendix Figure 2 This is a three-dimensional structural diagram of the vibration component in Embodiments 1 to 9 of the present invention.

[0016] Appendix Figure 3 This is a three-dimensional structural diagram of the feeding component in embodiments one to nine of the present invention.

[0017] Appendix Figure 4 This is a three-dimensional structural diagram of the discharge component in Embodiments 1 to 9 of the present invention.

[0018] Appendix Figure 5 For the appendix Figure 1 A magnified structural diagram of point A in the middle.

[0019] Appendix Figure 6 For the appendix Figure 1 A magnified structural diagram at point B in the middle.

[0020] Appendix Figure 7 This is a three-dimensional structural diagram of embodiments one through nine of the present invention. Figure 1 .

[0021] Appendix Figure 8 This is a three-dimensional structural diagram of embodiments one through nine of the present invention. Figure 2 .

[0022] Appendix Figure 9 These are schematic diagrams of the circuit structures of embodiments three to nine of the present invention.

[0023] The codes in the attached diagram are as follows: 1 for conveying pipe, 2 for conveying shaft, 3 for spiral blade, 4 for inlet, 5 for inlet pipe, 6 for outlet, 7 for outlet pipe, 8 for first drive mechanism, 9 for filter screen, 10 for guide plate, 11 for second drive mechanism, 12 for first eccentric connecting rod, 13 for first connecting rod, 14 for second connecting rod, 15 for third connecting rod, 16 for first fixed seat, 17 for second fixed seat, 18 for first rotating shaft, 19 for vibrating wheel, 20 for third drive mechanism, 21 for second rotating shaft, 22 for sleeve, 23 for connecting plate, 24 for support plate, and 25 for stop block. 6 is the rotating pin, 27 is the baffle, 28 is the pressure sensor, 29 is the sweeping rod, 30 is the support frame, 31 is the valve core, 32 is the discharge pipe, 33 is the transition section, 34 is the third rotating shaft, 35 is the fixing plate, 36 is the fixing rod, 37 is the second eccentric connecting rod, 38 is the fourth connecting rod, 39 is the push plate, 40 is the driving bevel gear, 41 is the guide groove, 42 is the shaft seat, 43 is the lifting shaft, 44 is the driven bevel gear, 45 is the lifting wheel, 46 is the drive motor, 47 is the transmission housing, 48 is the driven bevel gear, 49 is the driving bevel gear, 50 is the slide groove, 51 is the moving seat, and 52 is the protective sleeve. Detailed Implementation

[0024] The present invention is not limited to the following embodiments, and the specific implementation can be determined according to the technical solution of the present invention and the actual situation.

[0025] In this invention, for ease of description, the description of the relative positions of the components is based on the appendix to the specification. Figure 1 The layout is described using a diagrammatic method, such as the positional relationships of front, back, top, bottom, left, and right, which are based on the instructions attached. Figure 1 The orientation of the layout is determined by the direction of the map.

[0026] The present invention will be further described below with reference to embodiments and accompanying drawings: Example 1: As shown in the attached document Figures 1 to 8As shown, the catalyst particle size distribution adjustment device of the riser reactor in the catalytic cracking system includes a conveying pipe 1, a conveying shaft 2, a spiral blade 3, a first driving mechanism 8, a vibration component, a feeding component, and a discharging component. The conveying shaft 2 is rotatably installed inside the conveying pipe 1, and the spiral blade 3, which is fitted inside the conveying pipe 1, is fixedly installed on the outside of the conveying shaft 2. The first driving mechanism 8, which can drive the conveying shaft 2 to rotate, is fixedly installed at the left end of the conveying pipe 1. The left side of the conveying pipe 1 is provided with an inlet 4 that is connected to the inside and outside. A feeding pipe 5 is fixedly installed on the outside of the left side of the conveying pipe 1 corresponding to the position of the inlet 4. The feeding pipe 5 is provided with a vibration component and a feeding component at intervals. The vibration component is used to vibrate the material in the feeding pipe 5, and the feeding component is used to control the flow rate of the material in the inlet 4. The right side of the conveying pipe 1 is provided with an outlet 6 that is connected to the inside and outside. A discharging pipe 7 is fixedly installed on the outside of the right side of the conveying pipe 1 corresponding to the position of the discharging port 6. The discharging pipe 7 is provided with a discharging component that can make the material fall evenly from the lower end of the discharging pipe 7.

[0027] According to the requirements, the cross-section of the conveying pipe 1 and the interface of the discharge pipe 7 are both circular, and the cross-section of the inlet pipe 5 is square or rectangular. In order to facilitate the feeding of material into the inlet pipe 5, a guide pipe is fixedly installed at the upper end of the inlet pipe 5. The guide pipe is a frustum or funnel shape with a larger top and smaller bottom. The right side of the conveying pipe 1 can be tilted upward relative to the left side.

[0028] During use, the vibration component helps to break up the catalyst poured into the hopper, preventing large pieces of catalyst from entering the reaction device and avoiding incomplete reaction caused by catalysts of different sizes. By setting up the discharge component, the catalyst can enter the reaction device at a uniform speed, avoiding the accumulation of catalyst in the reaction device and affecting the reaction effect. This device can indirectly improve the reaction efficiency of the catalyst in the reaction device and avoid the phenomenon of incomplete reaction or waste of catalyst due to catalysts of different sizes.

[0029] The catalyst particle size distribution adjustment device of the riser reactor in the above-mentioned catalytic cracking system can be further optimized and / or improved according to actual needs: Example 2: As an optimization of the above examples, as shown in the appendix. Figure 1 , 2As shown in Figures 5, 7, and 8, the vibration assembly includes a filter screen 9, a guide plate 10, a second drive mechanism 11, a first eccentric connecting rod 12, a first connecting rod 13, a second connecting rod 14, and a third connecting rod 15. The lower end of the feed pipe 5 is fixedly installed on the upper left side of the conveying pipe 1. The filter screen 9 is slidably installed on the inner side of the upper part of the feed pipe 5. Below the filter screen 9, a guide plate 10 is hinged to the inner left side of the feed pipe 5. At least one first connecting rod 13 is spaced between the upper part of the guide plate 10 and the lower part of the filter screen 9. A first fixing seat 16 is hinged to the lower side of the first connecting rod 13. The lower side of the first fixing seat 16 is fixedly installed together with the upper side of the guide plate 10. A second fixing seat 17 is hinged to the upper side of the first fixing seat 16. The upper side of the second fixing seat 17 is fixedly installed together with the lower side of the filter screen 9. A second drive mechanism 11 is fixedly installed on the left side of the feed pipe 5 below the guide plate 10. A first rotating shaft 18 is rotatably installed on the left side of the feed pipe 5 above the second drive mechanism 11. The rear end of the first rotating shaft 18 is connected to the rear end of the output shaft of the second drive mechanism 11. A vibrating wheel 19 is fixedly installed on the outer side of the front end of the first rotating shaft 18. A second connecting rod 14 with a gap between its central axis and the central axis of the first rotating shaft 18 is fixedly installed on the front end of the vibrating wheel 19. The front end of the second connecting rod 14 is hinged to the first end of the first eccentric connecting rod 12. The second end of the first eccentric connecting rod 12 is hinged to the first end of the third connecting rod 15. The second end of the third connecting rod 15 passes through the left side wall of the feed pipe 5 and is movably installed on the lower side of the guide plate 10.

[0030] According to the requirements, the second drive mechanism 11 is a known technology, such as a geared motor. The rear end of the output shaft of the second drive mechanism 11 and the rear end of the first rotating shaft 18 are connected by a known transmission technology, such as belt drive, chain drive and gear drive. In this embodiment, belt drive is used, that is, both the rear end of the output shaft of the second drive mechanism 11 and the rear end of the first rotating shaft 18 are fixedly installed with pulleys, and the pulleys are connected by belt drive. In order to avoid the second drive mechanism 11 from reacting with the catalyst material, a protective shell is provided on the outside of the second drive mechanism 11. The protective shell is fixedly installed on the outside of the feed pipe 5.

[0031] During operation, when the catalyst enters the feed pipe 5 and falls onto the filter screen 9, some catalyst passes through the filter screen 9 and falls onto the guide plate 10, while the rest remains on the filter screen 9. When the second drive mechanism 11 operates, it drives the first rotating shaft 18 to rotate. The rotation of the first rotating shaft 18 drives the vibrating wheel 19 to rotate, thereby causing the first eccentric connecting rod 12 to drive the third connecting rod 15 to move back and forth. When the third connecting rod 15 moves back and forth, the right end of the guide plate 10 swings upward, reducing the distance between the right side of the guide plate 10 and the inner right side of the feed pipe 5, thus controlling the feed rate. When the right end of the guide plate 10 swings upward, the guide plate 10 drives the filter screen 9 to move upward within the feed pipe 5 via the first connecting rod 13. When the right end of the guide plate 10 swings downward, it increases the distance between the right side of the guide plate 10 and the inner right side of the feed pipe 5. The distance between the guide plate 10 and the inner right side of the feed pipe 5 is such that when the right end of the guide plate 10 swings downward, the guide plate 10 drives the filter screen 9 to move downward in the feed pipe 5 through the first connecting rod 13. When the second drive mechanism 11 works continuously, the right end of the guide plate 10 swings up and down, thereby driving the filter screen 9 to move up and down, which has a vibration effect on the catalyst on the upper side of the filter screen 9. This can shake all the catalyst into the upper side of the guide plate 10. The reciprocating swing of the guide plate 10 can quickly shake the material on the left and right into the feed assembly, thereby breaking up the catalyst clumps on the upper end of the filter screen 21, which is convenient for the catalyst to be transported. Through the cooperation of the guide plate 10 and the push rod, it is easy to unify the size of the catalyst diameter and avoid the reduction of the heat conduction and cooling effect of the catalyst to the inside of the reactor due to the different sizes of catalyst particles.

[0032] Example 3: As an optimization of the above examples, as shown in the appendix. Figure 1 , 3As shown in Figures 7, 8, and 9, the feeding assembly includes a third drive mechanism 20, a second rotating shaft 21, a sleeve 22, a distributing mechanism, and a controller. The third drive mechanism 20 is fixedly installed on the lower rear side of the feeding pipe 5, corresponding to the position below the guide plate 10. A second rotating shaft 21 is rotatably installed on the lower inner side of the feeding pipe 5, its rear end passing through the rear side of the feeding pipe 5 and connected to the front end of the output shaft of the third drive mechanism 20. A sleeve 22 is fixedly installed on the outer side of the second rotating shaft 21. Several distributing mechanisms are evenly distributed along the circumference of the outer side of the sleeve 22. Each distributing mechanism includes a connecting plate 23, a support plate 24, a cleaning rod 29, a stop block 25, a rotating pin 26, a baffle 27, and a pressure sensor 28. Several connecting plates 23 are evenly distributed along the circumference of the outer side of the sleeve 22. Along the clockwise direction, a support plate 24 is arranged parallel to the rear of each connecting plate 23. A pressure sensor 28 is provided between the front of the support plate 24 and the rear of the connecting plate 23. Two cleaning rods 29 are arranged at intervals on the rear side of the support plate 24. A rotating pin 26 is rotatably installed on the end of each cleaning rod 29 away from the sleeve 22. The end of the rotating pin 26 is fixedly installed together with the connecting plate 23. At least one stop 25 is fixedly installed at intervals on the rear side of the support plate 24 away from the sleeve, corresponding to the position between the two rotating pins 26. A baffle 27 is fixed on the side of the support plate 24 away from the sleeve 22. The front side of the baffle 27 extends to the outside of the adjacent connecting plate 23. Each pressure sensor 28 is connected to a controller, and the controller is connected to the third drive mechanism 20.

[0033] According to the requirements, the third drive mechanism 20 is a known technology, such as a geared motor or a stepper motor. The controller is a known technology, such as a programmable single-axis stepper motor servo motor controller. The pressure sensor 28 is a known technology, such as AR-DN31. In order to facilitate the connection between the pressure sensor 28 and the controller, a wire hole is provided at the rear of the feed pipe 5. A known through-hole slip ring is fixedly installed in the wire hole. The controller and the pressure sensor 28 are connected to the cable through the through-hole slip ring, which can avoid the cable from getting tangled when the sorting mechanism rotates. Four sorting mechanisms are evenly distributed around the circumference on the outer side of the sleeve 22. At least one stop 25 is fixedly installed on the rear side of the support plate 24 away from the sleeve at intervals corresponding to the position between the two rotating pins 26. Two cleaning rods 29 are provided on the rear side of the support plate 24 at intervals along the front and back direction. Two limiting plates are fixedly installed on the side of the support plate 24 near the sleeve 22 so that the distance between the two cleaning rods 29 gradually increases from the inside to the outside.

[0034] During use, after the catalyst falls from the lower end of the guide plate 10, it lands above the rightmost support plate 24. The two cleaning rods 29 above the rightmost support plate 24 are horizontal at this time, located on the upper front and upper rear sides of the support plate 24, respectively. Material falls between the two cleaning rods 29. When the catalyst on the upper side of the support plate 24 accumulates to a set weight, the pressure sensor 28 sends a signal to the controller, which then drives the third drive mechanism 20. When the output shaft of the third drive mechanism 20 rotates, it drives the sleeve 2... 2. As the distribution mechanism rotates, the rightmost support plate 24 rotates clockwise. The catalyst above the rightmost support plate 24 falls into the feed inlet 4 through the gap between the support plate 24 and the feed pipe 5. Simultaneously, as the rightmost support plate 24 rotates clockwise, the left ends of the two cleaning rods 29 move inward under gravity and rotate around their respective rotating pins 26. The left end of the front cleaning rod 29 swings backward, and the left end of the rear cleaning rod 29 swings forward. Thus, during the clockwise rotation of the rightmost support plate 24, the two cleaning rods 29 can remove the catalyst accumulated on the support plate. As the catalyst on surface 24 is scraped off, when the rightmost support plate 24 rotates to a vertical position, the ends of the two cleaning rods 29 fall onto the stop block 25, which acts as a limit. When the rightmost support plate 24 continues to rotate to the left and becomes a horizontal turntable, the state of the two cleaning rods 29 remains unchanged. When the rightmost support plate 24 continues to rotate clockwise from the left to a vertical position, the ends of the two cleaning rods 29 swing back to a vertical position under gravity. When the rightmost support plate 24 continues to rotate clockwise from the left to a horizontal position, the ends of the two cleaning rods 29 swing back to a vertical position under gravity. The state of the two cleaning rods 29 remains unchanged. During the process of the third drive mechanism 20 driving the support plate 24 to rotate and discharge material, the two cleaning rods 29 swing and scrape the material, preventing the catalyst from accumulating on the surface of the support plate 24. After the support plate 24 finishes discharging material, the two cleaning rods 29 can also return to their initial position, and the support plate 24 can be scraped repeatedly. With this setting, it is easy to control the amount of catalyst and avoid the situation where too much or too little catalyst enters the reaction device, resulting in inconsistent reaction effects.

[0035] Example 4: As an optimization of the above examples, as shown in the appendix. Figure 1 , 3 As shown, the side of the baffle 27 away from the sleeve 22 is an inwardly opening arc surface, and the arc surface is coaxial with the central axis of the second rotating shaft 21.

[0036] As required, the upper inner side of the feed pipe 5 has an arc-shaped groove that matches the arc surface of the baffle 27. The thickness of the rightmost baffle 27 gradually increases from top to bottom, and the right side of the baffle 27 is an arc surface with an opening to the left. During use, this setting allows control of the flow rate of the catalyst entering the conveying pipe 1 from the feed pipe 5, thereby precisely controlling the amount of material conveyed.

[0037] Example 5: As an optimization of the above examples, as shown in the appendix. Figure 1 , 4 As shown in Figures 6, 7, and 8, the discharge assembly includes a support frame 30, a valve core 31, and a lifting mechanism. The upper end of the discharge pipe 7 is fixedly installed together with the lower right side of the conveying pipe 1. A drop pipe 32 is fixedly installed at the lower end of the discharge pipe 7. The inner diameter of the upper end of the drop pipe 32 is smaller than the inner diameter of the lower end of the discharge pipe 7. A transition section 33, which is larger at the top and smaller at the bottom, is formed between the upper end of the drop pipe 32 and the lower end of the discharge pipe 7. The support frame 30 is fixedly installed on the inner side of the upper part of the drop pipe 32. A valve core 31 is provided on the upper side of the support frame 30. The upper part of the valve core 31 is a frustum shape with a smaller top and a larger bottom. The outer side of the lower part of the valve core 31 is in sealed contact with the inner side of the upper end of the drop pipe 32. A lifting mechanism is provided in the center of the support frame 30, which enables the valve core 31 to move up and down.

[0038] Depending on the requirements, a step-like transition section 33, a cone-shaped transition section 33 (larger at the top and smaller at the bottom), or a funnel-shaped transition section 33 (larger at the top and smaller at the bottom) can be formed between the upper end of the discharge pipe 32 and the lower end of the discharge pipe 7. During use, a drop pipe 32 is fixedly installed at the lower end of the discharge pipe 7. The inner diameter of the upper end of the drop pipe 32 is smaller than the inner diameter of the lower end of the discharge pipe 7. A transition section 33 with a larger upper end and a smaller lower end is formed between the upper end of the drop pipe 32 and the lower end of the discharge pipe 7. After the lifting mechanism is working, the valve core 31 moves up and down back and forth. In the initial state, the lower outer side of the valve core 31 is located on the inner side of the upper end of the drop pipe 32 and is in sealing contact with the inner side of the upper end of the drop pipe 32, thereby closing the discharge pipe 7 and preventing the catalyst from falling. When feeding begins, the lifting mechanism drives the valve core 31 to move upward. The valve core 31 moves upward to above the drop pipe 32. The diameter of the lower outer side of the valve core 31 is smaller than the diameter of the transition section 33, so that the lower end of the discharge pipe 7 can be connected to the upper end of the drop pipe 32, thereby allowing the catalyst in the discharge pipe 7 to fall through the drop pipe 32.

[0039] Example 6: As an optimization of the above examples, as shown in the appendix Figure 1 , 4As shown in Figure 6, the lifting mechanism includes a third rotating shaft 34, a fixed plate 35, a fixed rod 36, a driving bevel gear 40, a driven bevel gear 44, a second eccentric connecting rod 37, a fourth connecting rod 38, a push plate 39, and a fourth drive mechanism. The upper end of the valve core 31 has a transmission hole extending to the lower side of the support frame 30. A third rotating shaft 34, capable of transmitting torque to the valve core 31 and moving up and down relative to it, is installed in the transmission hole. A driving bevel gear 40 is fixedly installed on the outer side of the lower end of the third rotating shaft 34 corresponding to the lower end of the support frame 30. A fixed plate 35 is located below the driving bevel gear 40. Several fixed rods 36, whose upper ends are fixedly installed at positions corresponding to the lower side of the support frame 30, are evenly distributed along the circumference of the outer side of the fixed plate 35. The lower end of the valve core 31 has an annular guide groove 41 opening downwards. Several fixed rods 36, whose upper ends are fixedly installed at positions corresponding to the lower side of the support frame 30, are evenly distributed along the circumference of the upper side of the fixed plate 35 corresponding to the guide groove 41. Several bearing seats 42 are provided, and each bearing seat 42 is rotatably mounted with a lifting shaft 43. Each lifting shaft 43 is fixedly mounted with a driven bevel gear 44 that meshes with the driving bevel gear 40 on the outer side of its end near the lower end of the third rotating shaft 34. Each lifting shaft 43 is fixedly mounted with a lifting wheel 45 on the outer side of its end away from the lower end of the third rotating shaft 34. A second eccentric connecting rod 37 is fixedly mounted on the end face of the lifting wheel 45 away from the lower end of the third rotating shaft 34. There is a gap between the central axis of each second eccentric connecting rod 37 and the corresponding lifting shaft 43. Each second eccentric connecting rod 37 is hinged to a vertically arranged fourth connecting rod 38 at its end. Each fourth connecting rod 38 is hinged to a push plate 39 at its upper end. The outer side of the upper part of each push plate 39 is slidably mounted in a guide groove 41. The inner side of the upper part of the discharge pipe 7 is provided with a fourth drive mechanism that can drive the third rotating shaft 34 to rotate.

[0040] According to the requirements, the support frame 30 includes a circular support ring located at the lower end of the valve core 31. Several support rods are fixedly installed at intervals along the circumference on the outer side of the support ring. The upper end of the fixed rod 36 is fixedly installed together with the lower side of the corresponding support rod. The end of each support rod is fixedly installed together with the corresponding position inside the discharge pipe 7. Four bearing seats 42 are evenly distributed at intervals along the circumference on the upper side of the fixed plate 35 corresponding to the guide groove 41. The cross-section of the upper part of the guide groove 41 and the push plate 39 can be T-shaped with a wider upper part and a narrower lower part. The cross-section of the lower outer part of the transmission hole and the third rotating shaft 34 can be a regular polygon. In this way, when the third rotating shaft 34 rotates, the valve core 31 can rotate relative to the third rotating shaft 34 and move up and down relative to the third rotating shaft 34 under the action of the third rotating shaft 34 and the second eccentric connecting rod 37. The transmission hole and the third rotating shaft 34 can also be splined, or the inner wall of the transmission hole is provided with a groove that runs vertically through and opens inward. A guide slider fixedly installed together with the outer side of the third rotating shaft 34 is slidably installed in the groove.

[0041] During operation, after the catalyst is conveyed by the spiral blades 3 to the discharge pipe 7, the fourth drive mechanism operates, driving the third rotating shaft 34 to rotate. When the third rotating shaft 34 rotates, it drives the valve core 31 and the active bevel gear 40 to rotate. The fixed plate 35 is fixedly installed with the support frame 30 under the action of the fixed rod 36. When the active bevel gear 40 rotates, it drives the driven bevel gear 44 to rotate. When the driven bevel gear 44 rotates, it drives the lifting shaft 43 to rotate within the shaft seat 42. When the lifting shaft 43 rotates, it drives the lifting wheel 45 to rotate. Each second eccentric connecting rod 37 has a gap between its central axis and the corresponding lifting shaft 43. All second eccentric connecting rods 37 have the same gap between their central axes and the corresponding lifting shaft 43. The central axis of all the second eccentric connecting rods 37 is located below the corresponding lifting shaft 43. When the lifting wheel 45 rotates, the upper end of the fourth connecting rod 38 moves up and down reciprocally through the second eccentric connecting rods 37. Each fourth connecting rod 38 is hinged to a push plate 39. The outer side of the upper part of each push plate 39 is slidably installed in the guide groove 41. When the upper end of the fourth connecting rod 38 moves up and down reciprocally, the push plate 39 moves up and down reciprocally. The valve core 31 moves up and down reciprocally under the action of the push plate 39 while rotating with the third rotating shaft 34. When the valve core 31 moves upward, the lower end of the valve core 31 moves to the transition section 33. This will create a gap between the outer side of the valve core 31 and the inner wall of the transition section 33, so that the catalyst flows out of the feed pipe 32 at a uniform speed.

[0042] Example 7: As an optimization of the above examples, as shown in the appendix. Figure 1 , 4 As shown in Figures 6, 7, and 8, the fourth drive mechanism includes a drive motor 46, a transmission housing 47 fixedly installed on the inner side of the upper part of the discharge pipe 7, a driven bevel gear 48 fixedly installed after the upper end of the third rotating shaft 34 passes through the inner side of the lower part of the transmission housing 47, a drive motor 46 fixedly installed on the right side of the upper part of the discharge pipe 7, and a drive bevel gear 49 that meshes with the driven bevel gear 48 fixedly installed on the left end of the output shaft of the drive motor 46 after passing through the right side of the discharge pipe 7.

[0043] As required, the drive motor 46 is a known geared motor, and the transmission housing 47 is a box-shaped structure with an opening to the right. To reduce the impact of the catalyst outlet rate, the left cross-section of the transmission housing 47 is an arc shape with an opening to the right. During use, the transmission housing 47 protects the bevel gears, preventing catalyst from falling onto the tooth surfaces of the driving bevel gear 49 and the driven bevel gear 48, thus reducing wear and extending their service life. To improve the sealing of the transmission housing 47, sealing rings are provided between the upper outer side of the third rotating shaft 34, the outer side of the output shaft of the drive motor 46, and the transmission housing 47.

[0044] Example 8: As an optimization of the above examples, as shown in the appendix Figure 1 , 2 As shown in Figure 5, the left side of the guide plate 10 is inclined upward relative to the right side. The left side of the guide plate 10 is provided with a downward-opening strip groove 50. A movable seat 51 is slidably installed in the groove 50. The lower part of the movable seat 51 is hinged to the second end of the third connecting rod 15.

[0045] According to requirements, the cross-sections of the strip chute 50 and the movable seat 51 are both T-shaped, narrower at the bottom and wider at the top. The movable seat 51 slides left and right within the strip chute 50. During use, with this configuration, when the catalyst enters the feed pipe 5 and falls onto the filter screen 9, some catalyst passes through the filter screen 9 and falls onto the guide plate 10, while the rest remains on the filter screen 9. When the second drive mechanism 11 operates, it drives the first rotating shaft 18 to rotate. The rotation of the first rotating shaft 18 then drives the vibrating wheel 19 to rotate, causing the first eccentric connecting rod 12 to drive the third connecting rod 15 to move left and right reciprocally. This reciprocating movement of the third connecting rod 15 causes the movable seat 51 to move back and forth within the chute 50. Since the left side of the guide plate 10 is hinged to the inner wall of the feed pipe 5, when the third connecting rod 15 causes the movable seat 51 to move to the right within the chute 50, the right end of the guide plate 10 swings upward, reducing the distance between the right side of the guide plate 10 and the inner right side of the feed pipe 5, thereby controlling the feed rate. When the guide plate 10 swings upward at its right end, the guide plate 10 drives the filter screen 9 to move upward in the feed pipe 5 via the first connecting rod 13. When the third connecting rod 15 causes the moving seat 51 to move to the left in the slide 50, the guide plate 10 swings downward at its right end, increasing the distance between the right side of the guide plate 10 and the inner right side of the feed pipe 5. When the guide plate 10 swings downward at its right end, the guide plate 10 drives the filter screen 9 to move downward in the feed pipe 5 via the first connecting rod 13. Thus, when the second drive mechanism 11 continues to work, it will cause the guide plate 10 to swing up and down repeatedly, thereby driving the filter screen 9 to move up and down repeatedly, which will have a vibration effect on the catalyst on the upper side of the filter screen 9. This will shake all the catalyst into the upper side of the guide plate 10. The reciprocating swing of the guide plate 10 can quickly shake the material from the left and right into the feed assembly, which is convenient for the conveying of the catalyst.

[0046] Example 9: As an optimization of the above examples, as shown in the appendix Figure 2 , 5 As shown, a protective sleeve 52 is fixedly installed on the inner side of the feed pipe 5 and fitted onto the outer side of the third connecting rod 15.

[0047] As required, the protective sleeve 52 is a conventionally known plastic sleeve. During use, this design prevents the catalyst from reacting with the third connecting rod 15, extending the service life of the third connecting rod 15 and reducing the failure rate.

[0048] The above technical features constitute various embodiments of the present invention, which have strong adaptability and optimal implementation effect. Unnecessary technical features can be added or removed according to actual needs to meet the requirements of different situations.

Claims

1. A device for adjusting the particle size distribution of catalyst in a riser reactor of a catalytic cracking system, characterized in that... The device includes a conveying pipe, a conveying shaft, spiral blades, a first drive mechanism, a vibration component, a feeding component, and a discharging component. The conveying shaft is rotatably mounted inside the conveying pipe, and spiral blades, fitted inside the conveying pipe, are fixedly mounted on the outside of the conveying shaft. A first drive mechanism capable of driving the conveying shaft to rotate is fixedly mounted on the left end of the conveying pipe. The left side of the conveying pipe has an inlet that communicates internally and externally. A feeding pipe is fixedly mounted on the outside of the left side of the conveying pipe corresponding to the inlet position. A vibration component and a feeding component are spaced apart inside the feeding pipe. The vibration component is used to vibrate the material inside the feeding pipe, and the feeding component is used to control the flow rate of the material inside the inlet. The right side of the conveying pipe has an outlet that communicates internally and externally. A discharging pipe is fixedly mounted on the outside of the right side of the conveying pipe corresponding to the outlet position. A discharging component is provided inside the discharging pipe to allow material to fall evenly from the lower end of the discharging pipe.

2. The catalyst particle size distribution adjustment device for the riser reactor of the catalytic cracking system according to claim 1, characterized in that... The vibration assembly includes a filter screen, a guide plate, a second drive mechanism, a first eccentric connecting rod, a first connecting rod, a second connecting rod, and a third connecting rod. The lower end of the feed pipe is fixedly installed on the upper left side of the conveying pipe. A filter screen is slidably installed on the inner side of the upper part of the feed pipe. Below the filter screen, a guide plate is hinged to the inner left side of the feed pipe. At least one first connecting rod is spaced between the upper part of the guide plate and the lower part of the filter screen. A first fixing seat is hinged to the lower side of the first connecting rod, and the lower side of the first fixing seat is fixedly installed together with the upper side of the guide plate. A second fixing seat is hinged to the upper side of the first fixing seat, and the upper side of the second fixing seat is fixedly installed together with the lower side of the filter screen, corresponding to the lower part of the guide plate. A second drive mechanism is fixedly installed on the left side of the feed pipe. A first rotating shaft is rotatably installed on the left side of the feed pipe above the second drive mechanism. The rear end of the first rotating shaft is connected to the rear end of the output shaft of the second drive mechanism. A vibrating wheel is fixedly installed on the outer side of the front end of the first rotating shaft. A second connecting rod with a gap between its central axis and the central axis of the first rotating shaft is fixedly installed on the front end of the vibrating wheel. The front end of the second connecting rod is hinged to the first end of the first eccentric connecting rod. The second end of the first eccentric connecting rod is hinged to the first end of the third connecting rod. The second end of the third connecting rod passes through the left side wall of the feed pipe and is movably installed on the lower side of the guide plate.

3. The catalyst particle size distribution adjustment device for the riser reactor of the catalytic cracking system according to claim 2, characterized in that... The feeding assembly includes a third drive mechanism, a second rotating shaft, a sleeve, a distributing mechanism, and a controller. The third drive mechanism is fixedly installed on the lower rear side of the feeding pipe, corresponding to the position below the guide plate. A second rotating shaft is rotatably installed on the lower inner side of the feeding pipe, its rear end passing through the rear side of the feeding pipe and connected to the front end of the output shaft of the third drive mechanism. A sleeve is fixedly installed on the outer side of the second rotating shaft. Several distributing mechanisms are evenly distributed along the circumference of the outer side of the sleeve. Each distributing mechanism includes a connecting plate, a support plate, a cleaning rod, a stop block, a rotating pin, a baffle, and a pressure sensor. Several connecting plates are evenly distributed along the circumference of the outer side of the sleeve. In the needle direction, a support plate is arranged parallel to the rear of each connecting plate. A pressure sensor is provided between the front of the support plate and the rear of the connecting plate. Two cleaning rods are arranged at intervals on the rear side of the support plate. A rotating pin is rotatably installed at the end of each cleaning rod away from the sleeve. The end of the rotating pin is fixedly installed together with the connecting plate. At least one stop is fixedly installed at intervals on the rear side of the support plate away from the sleeve at the position corresponding to the position between the two rotating pins. A baffle is fixed on the side of the support plate away from the sleeve. The front side of the baffle extends to the outside of the connecting plate at the adjacent position. Each pressure sensor is connected to the controller, and the controller is connected to the third drive mechanism.

4. The catalyst particle size distribution adjustment device for the riser reactor in a catalytic cracking system according to claim 3, characterized in that... The side of the baffle away from the sleeve is an inwardly opening arc surface, and the arc surface is coaxial with the central axis of the second rotating shaft.

5. The catalyst particle size distribution adjustment device for the riser reactor of the catalytic cracking system according to claim 2, 3, or 4, characterized in that... The discharge assembly includes a support frame, a valve core, and a lifting mechanism. The upper end of the discharge pipe is fixedly installed together with the lower right side of the conveying pipe. A drop pipe is fixedly installed at the lower end of the discharge pipe. The inner diameter of the upper end of the drop pipe is smaller than the inner diameter of the lower end of the discharge pipe. A transition section with a larger upper end and a smaller lower end is formed between the upper end of the drop pipe and the lower end of the discharge pipe. A support frame is fixedly installed on the inner side of the upper part of the drop pipe. A valve core is provided on the upper side of the support frame. The upper part of the valve core is a frustum shape with a smaller upper end and a larger lower end. The outer side of the lower part of the valve core is in sealing contact with the inner side of the upper end of the drop pipe. A lifting mechanism is provided in the center of the support frame, which enables the valve core to move up and down reciprocally.

6. The catalyst particle size distribution adjustment device for the riser reactor of the catalytic cracking system according to claim 5, characterized in that... The lifting mechanism includes a third rotating shaft, a fixed plate, a fixed rod, a driving bevel gear, a driven bevel gear, a second eccentric connecting rod, a fourth connecting rod, a push plate, and a fourth drive mechanism. The upper end of the valve core has a transmission hole extending to the lower side of the support frame. A third rotating shaft, capable of transmitting torque to the valve core and moving vertically relative to it, is installed within the transmission hole. A driving bevel gear is fixedly installed on the outer side of the lower end of the third rotating shaft, corresponding to the lower end of the support frame. A fixed plate is located below the driving bevel gear. Several fixed rods, whose upper ends are fixedly installed to the lower side of the support frame, are evenly distributed circumferentially on the outer side of the fixed plate. The lower end of the valve core has a downward-opening annular guide groove. Several shaft seats are evenly distributed circumferentially on the upper side of the fixed plate corresponding to the guide groove. Each shaft seat contains a rotatably mounted lifting shaft. A driven bevel gear, meshing with the driving bevel gear, is fixedly mounted on the outer side of the end of each lifting shaft near the lower end of the third rotating shaft. A lifting wheel is fixedly mounted on the outer side of the end of each lifting shaft away from the lower end of the third rotating shaft. A second eccentric connecting rod is fixedly mounted on the end face of the lifting wheel away from the lower end of the third rotating shaft. A gap is provided between the central axis of each second eccentric connecting rod and the corresponding lifting shaft. A vertically arranged fourth connecting rod is hinged to the end of each second eccentric connecting rod. A push plate is hinged to the upper end of each fourth connecting rod. The upper outer side of each push plate is slidably mounted in a guide groove. A fourth drive mechanism capable of driving the third rotating shaft to rotate is provided on the upper inner side of the discharge pipe.

7. The catalyst particle size distribution adjustment device for the riser reactor of the catalytic cracking system according to claim 6, characterized in that... The fourth drive mechanism includes a drive motor, a transmission housing is fixedly installed on the inner side of the upper part of the discharge pipe, a driven bevel gear is fixedly installed after the upper end of the third rotating shaft passes through the inner side of the lower part of the transmission housing, a drive motor is fixedly installed on the right side of the upper part of the discharge pipe, and an active bevel gear that meshes with the driven bevel gear is fixedly installed after the left end of the output shaft of the drive motor passes through the right side of the discharge pipe.

8. The catalyst particle size distribution adjustment device for the riser reactor of the catalytic cracking system according to claim 2, 3, 4, 6, or 7, characterized in that... The left side of the guide plate is inclined upward relative to the right side. The left side of the guide plate is provided with a downward-opening strip groove. A movable seat is slidably installed in the groove. The lower part of the movable seat is hinged to the second end of the third connecting rod. Or / and, a protective sleeve fitted onto the outside of the third connecting rod is fixedly installed on the inside of the feed pipe.

9. The catalyst particle size distribution adjustment device for the riser reactor of the catalytic cracking system according to claim 5, characterized in that... The left side of the guide plate is inclined upward relative to the right side. The left side of the guide plate is provided with a downward-opening strip groove. A movable seat is slidably installed in the groove. The lower part of the movable seat is hinged to the second end of the third connecting rod. Or / and, a protective sleeve fitted onto the outside of the third connecting rod is fixedly installed on the inside of the feed pipe.

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