Catalytic cracking catalyst separating and conveying device
By designing a catalyst separation and conveying device for catalytic cracking, high-pressure gas is used to carry powdered catalyst upwards, solving the problem of equipment corrosion by reaction gases during catalyst production and achieving safe separation and conveying of solid catalysts.
Patent Information
- Application Number
- CN202511245349.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-02
- Publication Date
- 2025-11-21
AI Technical Summary
In the production process of catalytic cracking catalysts, the reaction gases are prone to corroding downstream equipment, and existing technologies make it difficult to effectively separate and transport the solid catalyst separately.
Design a catalyst separation and conveying device for catalytic cracking, including a converter discharge scraper, a solid material scraper, a shut-off valve, a powder discharge cylinder and an air supply cylinder. The device uses high-pressure gas to carry the powdered catalyst upwards, thereby separating the solid catalyst from the reaction gas and conveying it separately to subsequent equipment.
This achieves effective separation of solid catalyst and reactant gas, reduces corrosion of downstream equipment by reactant gas, and ensures safe delivery of catalyst.
Smart Images
Figure CN120986907A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of petrochemical technology, and in particular to a catalytic cracking catalyst separation and conveying device. Background Technology
[0002] Catalytic cracking catalysts are core materials in petroleum refining. Catalytic cracking catalysts are usually in powder form, hereinafter referred to as catalysts. Catalysts are produced by catalyst production converters, and the produced catalysts are passed into subsequent equipment such as solid material dust removal equipment.
[0003] However, while producing solid catalysts in the catalyst production converter, corrosive reaction gases are also generated. If the catalyst production converter is directly connected to downstream equipment, the reaction gases can easily corrode the downstream equipment. Summary of the Invention
[0004] The purpose of this invention is to provide a catalytic cracking catalyst separation and conveying device to separate the solid catalyst and reactant gas and separately convey the solid catalyst to downstream equipment, thereby reducing the corrosion of downstream equipment by the reactant gas.
[0005] In a first aspect, the present invention provides a catalytic cracking catalyst separation and conveying device, comprising: A converter discharge scraper is provided with a discharge channel at the bottom for discharging solid catalyst, and an exhaust port on the cylinder wall for discharging reaction gases. A solid material scraper conveyor has a receiving channel and a discharge port, the receiving channel being connected to the discharge channel, and the solid material scraper conveyor is used to convey the solid catalyst from the receiving channel to the discharge port; A shut-off valve is installed at the connection between the discharge channel and the receiving channel to control the connection or disconnection of the discharge channel and the receiving channel; The powder discharge cylinder has a powder discharge port at the top, an air inlet at the bottom, and a powder inlet on its wall. The solid material scraper is fixed to the outside of the cylinder wall, and the discharge port is connected to the powder inlet. An air supply cylinder is fixedly connected to the powder outlet cylinder in parallel. The upper part of the air supply cylinder is provided with an air supply channel for introducing high-pressure gas, and the lower part of the air supply cylinder is connected to the air inlet.
[0006] In some possible implementations, the solid material scraper conveyor includes: The shell has a communicating material cavity and the discharge port, and the shell is fixed to the outer wall of the powder discharge cylinder; The receiving channel, the lower end of the receiving channel is connected to the material cavity; A scraper assembly is rotatably disposed within the material chamber, and the scraper assembly is used to push the solid catalyst from the receiving channel to the discharge port; A scraper drive assembly is located outside the housing and is drivenly connected to the scraper assembly to drive the scraper assembly to rotate.
[0007] In some possible implementations, the scraper assembly includes: A rotating shaft sealing structure is provided between the housing and the scraper drive assembly; A scraper shaft is vertically rotatably mounted on the housing, with one end of the scraper shaft extending out of the housing and sealingly passing through the rotating shaft sealing structure, and is drivenly connected to the scraper drive assembly; Multiple scrapers are arranged radially and evenly on the scraper shaft.
[0008] In some possible implementations, the cylinder wall of the powder outlet body forms a slope that is inclined outward from bottom to top relative to the axis of the powder outlet body at a position below the powder inlet; the downward projection of the rotation amplitude of the scraper is located on the slope.
[0009] In some possible implementations, the shaft sealing structure includes: A sealing sleeve, one end of which is sealed and fixed to the outer wall of the housing, and the sealing sleeve is sleeved on the outside of the scraper shaft; A stuffing box is used to fill the annular gap between the sealing sleeve and the scraper shaft. A sealing gland, one end of which extends into the sealing sleeve and presses against the stuffing gland, is securely connected to the end of the sealing sleeve by fasteners.
[0010] In some possible implementations, the solid material scraper conveyor further includes a heat insulation layer disposed on the inner wall and / or outer wall of the housing; And / or, the wall of the air supply cylinder is provided with a heat insulation layer.
[0011] In some possible implementations, the air supply cylinder is arranged to surround the outside of the powder outlet cylinder, the top of the powder outlet cylinder extends out of the air supply cylinder, and the bottom of the powder outlet cylinder is located inside the air supply cylinder; One side of the powder outlet cylinder is fixedly attached to one side of the inner wall of the air supply cylinder. The other side of the powder outlet cylinder, the other side of the inner wall of the air supply cylinder, and the bottom of the powder outlet cylinder and the bottom of the air supply cylinder form an L-shaped channel. The upper part of the L-shaped channel is connected to the air supply channel, and the lower part of the L-shaped channel is connected to the air inlet.
[0012] In some possible implementations, the flow cross-section of the air inlet of the powder outlet cylinder gradually increases from bottom to top.
[0013] In some possible implementations, the air supply channel is located on the same side of the air supply cylinder and the powder outlet channel, the axis of the air supply channel is perpendicular to the axis of the air supply cylinder, and the outlet airflow direction of the air supply channel is tangent to the cylinder wall of the air supply cylinder. Alternatively, the air supply channel surrounds both sides of the cylinder wall of the air supply cylinder, and the inner wall of the air supply channel and the two side cylinder walls of the air supply cylinder form two gas passages. The two gas passages share the inlet of one air supply channel, and the outlet airflow of each gas passage is tangent to the cylinder wall of the air supply cylinder.
[0014] In some possible implementations, the catalytic cracking catalyst separation and delivery device also includes: Multiple sensors are arranged at intervals on the inner wall of the discharge channel along the discharge direction to detect the level of the solid catalyst in the discharge channel. A controller, connected to the sensor and the solid material scraper conveyor, is used to control the material conveying speed of the solid material scraper conveyor according to the material level.
[0015] In some possible implementations, the sensor is a temperature sensor used to detect the temperature of the solid catalyst in contact with it. When the temperature detected by the temperature sensor is within the temperature threshold of the solid catalyst, it is determined that the temperature sensor is in contact with the solid catalyst to obtain the level of the solid catalyst located in the discharge channel. Alternatively, the sensor may be a level sensor, which is used to detect the level of the solid catalyst located in the discharge channel.
[0016] Compared with the prior art, the beneficial effects of the technical solution of this application are: Solid catalyst and reaction gas are generated inside the converter discharge scraper. When the solid catalyst needs to be separated and transported, the shut-off valve located between the discharge channel and the receiving channel is opened, connecting the two channels. The solid catalyst is discharged through the discharge channel at the bottom of the converter discharge scraper to the receiving channel of the solid material scraper. The solid material scraper then transports the solid catalyst from the receiving channel to the discharge port and into the powder discharge cylinder through the powder inlet. Simultaneously, or beforehand, high-pressure gas is sent into the air supply cylinder through the air supply channel. The high-pressure gas enters the air inlet of the powder discharge cylinder from the lower part of the air supply cylinder and blows upward, carrying the powdered solid catalyst upward and discharging it from the powder outlet at the top of the powder discharge cylinder into subsequent equipment, completing the separate transport of the solid catalyst. During the solid catalyst transport process, the solid catalyst always fills the discharge and receiving channels, sealing the discharge and receiving channels through its own action. At this time, the reaction gas inside the converter discharge scraper can hardly pass through the discharge and receiving channels. The reaction gas can only be discharged through the exhaust port on the converter discharge scraper, thus achieving the separation of the solid catalyst and the reaction gas. The separated solid catalyst is transported separately to the downstream equipment, reducing the possibility of the reaction gas entering the downstream equipment and corroding it. This solves the problem of the reaction gas generated during catalyst production being transported with the catalyst and causing corrosion to the downstream equipment. Attached Figure Description
[0017] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this invention, illustrate exemplary embodiments of the invention and are used to explain the invention, but do not constitute an undue limitation of the invention. In the drawings: Figure 1 This is a front view schematic diagram of a catalytic cracking catalyst separation and conveying device provided in an embodiment of the present invention; Figure 2 A perspective structural schematic diagram of a catalytic cracking catalyst separation and conveying device excluding a converter discharge scraper, provided for an embodiment of the present invention; Figure 3 for Figure 2 A side view diagram; Figure 4 for Figure 2 A top-down view; Figure 5 for Figure 4 A schematic diagram showing the exposed scraper assembly; Figure 6 This is a schematic diagram of the internal structure of a solid material scraper conveyor in a catalytic cracking catalyst separation and conveying device according to an embodiment of the present invention. Figure 7 for Figure 6 A schematic diagram of the internal structure of a scraper conveyor for solid materials from another angle; Figure 8 for Figure 7 Schematic diagram of section AA; Figure 9 for Figure 6 A partially enlarged schematic diagram of the sealing structure of a scraper conveyor for solid materials; Figure 10 A schematic diagram of the air supply channel arrangement of another catalytic cracking catalyst separation and conveying device provided in an embodiment of the present invention; Figure 11 for Figure 10 A top-down view.
[0018] Figure reference numerals: 100 is the converter discharge scraper conveyor, 110 is the discharge channel, 120 is the exhaust port, 130 is the scraper mechanism, 200 is the sensor, 300 is the shut-off valve, 400 is the solid material scraper conveyor, 410 is the scraper drive assembly, 411 is the drive component, 412 is the mounting bracket, 420 is the receiving channel, 430 is the housing, 431 is the material chamber, 432 is the discharge port, 440 is the scraper assembly, 441 is the scraper shaft, 4 42 is the scraper, 450 is the insulation layer, 460 is the rotating shaft sealing structure, 461 is the sealing cover, 462 is the fastener, 463 is the sealing sleeve, 464 is the stuffing box, 500 is the air supply cylinder, 510 is the air supply channel, 511 is the inlet, 512 is the gas passage, 520 is the L-shaped channel, 600 is the powder outlet cylinder, 610 is the powder outlet, 620 is the air inlet, 630 is the powder inlet, 640 is the slope surface, and 700 is the bearing plate. Detailed Implementation
[0019] To make the technical problems, solutions, and beneficial effects of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.
[0020] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.
[0021] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified. "Several" means one or more, unless otherwise explicitly specified.
[0022] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.
[0023] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.
[0024] like Figures 1-8 As shown, this embodiment of the invention provides a catalytic cracking catalyst separation and conveying device, which includes a converter discharge scraper 100, a solid material scraper 400, a shut-off valve 300, a powder discharge cylinder 600, and an air supply cylinder 500; wherein, the converter discharge scraper 100 is used to connect with the discharge end of the catalyst converter, which is used to produce powdered solid catalyst, i.e., catalytic cracking catalyst, and also produces corrosive reaction gases. Figure 1 As shown, the bottom of the converter discharge scraper 100 is provided with a discharge channel 110 for discharging solid catalyst. The discharge direction of the discharge channel 110 is tangential to the inner wall of the converter discharge scraper 100 cylinder, achieving tangential discharge. The cylinder wall of the converter discharge scraper 100 has an exhaust port 120 for discharging reaction gases. The exhaust port 120 can be located at the top of the converter discharge scraper 100 or other upper positions to prevent the solid catalyst from contacting the exhaust port 120. An exhaust valve is installed at the exhaust port 120 to control its opening and closing. A scraper mechanism 130 is provided inside the converter discharge scraper 100 to push the solid catalyst towards the discharge channel 110. Figures 1-7As shown, the solid material scraper conveyor 400 has a receiving channel 420 and a discharge port 432. The receiving channel 420 is connected to the discharge channel 110. The solid material scraper conveyor 400 is used to convey solid catalyst from the receiving channel 420 to the discharge port 432. A shut-off valve 300 is set at the connection between the discharge channel 110 and the receiving channel 420 to control the connection or disconnection of the discharge channel 110 and the receiving channel 420. The shut-off valve 300 can be a manual shut-off valve or an automatic shut-off valve. The powder discharge cylinder 600 is placed vertically. A powder discharge port 610 is opened at the top of the powder discharge cylinder 600, and an air inlet 620 is opened at the bottom of the powder discharge cylinder 600. The cylinder wall is provided with a powder inlet 630. A solid material scraper 400 is fixed to the outside of the cylinder wall of the powder discharge cylinder 600. The discharge port 432 of the solid material scraper 400 is connected to the powder inlet 630 of the powder discharge cylinder 600, so that the solid catalyst can enter the powder discharge cylinder 600 through the solid material scraper 400. The air supply cylinder 500 is arranged in parallel with the powder discharge cylinder 600 and fixedly connected. The air supply cylinder 500 is placed vertically. The upper part of the air supply cylinder 500 is provided with an air supply channel 510 for introducing high-pressure gas. The air supply channel 510 is connected to the inside of the air supply cylinder 500. The lower part of the air supply cylinder 500 is connected to the air inlet 620 of the powder discharge cylinder 600.
[0025] When the catalytic cracking catalyst separation and conveying device is working, solid catalyst and reaction gas are generated in the converter discharge scraper 100. When solid catalyst separation and conveying are required, the shut-off valve 300 located between the discharge channel 110 and the receiving channel 420 is opened, connecting the discharge channel 110 and the receiving channel 420. The solid catalyst, pushed by the scraper mechanism 130 inside the converter discharge scraper 100, enters the discharge channel 110 at the bottom of the converter discharge scraper 100 and is discharged from the discharge channel 110 into the receiving channel 420 of the solid material scraper 400. The solid catalyst is conveyed from the receiving channel 420 to the discharge port 432 and enters the powder discharge cylinder 600 through the powder inlet 630. At the same time, or beforehand, high-pressure gas is sent into the air supply cylinder 500 through the air supply channel 510. The high-pressure gas is conveyed from top to bottom in the air supply cylinder 500 and then enters the air inlet 620 of the powder discharge cylinder 600 from the bottom of the air supply cylinder 500. The high-pressure gas is blown upward, carrying the powdered solid catalyst upward, and finally discharged from the powder outlet 610 at the top of the powder discharge cylinder 600 and enters the subsequent equipment, completing the conveying of the solid catalyst. During the solid catalyst conveying process, the solid catalyst always fills the discharge channel 110 and the receiving channel 420. The solid catalyst itself seals the receiving channel 420 and the discharge channel 110, isolating the gas connection between the converter discharge scraper 100 and the solid material scraper 400. At this time, the reaction gas in the converter discharge scraper 100 can hardly pass through the discharge channel 110 and the receiving channel 420. The reaction gas can only be discharged through the exhaust port 120 on the converter discharge scraper 100, realizing the separation of solid catalyst and reaction gas. The separated solid catalyst is separately conveyed to the downstream equipment, reducing the possibility of reaction gas entering the downstream equipment and corroding it. This solves the problem of reaction gas generated during catalyst production being conveyed with the catalyst and corroding the downstream equipment.
[0026] After the solid catalyst is conveyed, the shut-off valve 300 is closed, leaving solid catalyst in the discharge channel 110 to isolate the gas phase and prevent reactive gases from entering the solid material scraper conveyor 400. Alternatively, before starting the next solid catalyst conveying, the shut-off valve 300 is kept closed. After the solid catalyst fills the discharge channel 110, the shut-off valve 300 is slowly opened. At this time, the solid material scraper conveyor 400 is stopped. After the solid catalyst fills the receiving channel 420 and enters the material chamber 431, the solid material scraper conveyor 400 is started. Throughout the process, the solid catalyst maintains a gas phase seal between the discharge channel 110 and the receiving channel 420.
[0027] like Figures 1-7As shown, in some embodiments, the solid material scraper conveyor 400 includes a housing 430, a receiving channel 420, a scraper assembly 440, and a scraper drive assembly 410. The housing 430 has a communicating material cavity 431 and a discharge port 432. The housing 430 is fixed to the outer wall of the powder discharge cylinder 600. The discharge port 432 of the housing 430 is connected to the powder inlet 630 of the powder discharge cylinder 600. It should be noted that the shell wall of the housing 430 connected to the powder discharge cylinder 600 can share a portion of the cylinder wall of the powder discharge cylinder 600, and the discharge port 432 and the powder inlet 630 are the same, to simplify the structure. Alternatively, the shell wall of the housing 430 and the cylinder wall of the powder discharge cylinder 600 can be separately provided, in which case the discharge port 432 and the powder inlet 630 are respectively provided on the shell wall and the cylinder wall of the powder discharge cylinder 600, and the discharge port 432 and the powder inlet 630 are sealed and connected. The receiving channel 420 can be inclined to facilitate the solid catalyst falling under its own weight. The lower end of the receiving channel 420 is connected to the material chamber 431, and the upper end of the receiving channel 420 is connected to the discharge channel 110. The cross-sectional shape of the receiving channel 420 and the discharge channel 110 can be rectangular, circular, polygonal, etc., and is not limited here. The scraper assembly 440 is rotatably disposed in the material chamber 431. The scraper assembly 440 rotates in the horizontal plane and is used to push the solid catalyst entering the material chamber 431 from the receiving channel 420 to the discharge port 432 and discharge it into the powder discharge cylinder 600. The scraper drive assembly 410 is located outside the housing 430 and is drivenly connected to the scraper assembly 440 to drive the scraper assembly 440 to rotate.
[0028] During operation, when the solid material scraper conveyor 400 needs to be started, the scraper drive assembly 410 starts working, driving the scraper assembly 440 to rotate, thereby pushing the solid catalyst in the material chamber 431 into the powder discharge cylinder 600. The solid material scraper conveyor 400 can control the conveying quantity and speed of the solid catalyst by adjusting the rotation speed of the scraper assembly 440 through the scraper drive assembly 410, achieving quantitative and controllable continuous conveying while maintaining gas phase isolation, thus separating the solid catalyst from the reactant gas.
[0029] For example, such as Figure 6 and Figure 7 As shown, the scraper drive assembly 410 may include a drive component 411 and a mounting bracket 412. The mounting bracket 412 is fixed on the housing 430 and supports the drive component 411. The mounting bracket 412 may be a sleeve structure for passing through the scraper shaft 441 of the scraper assembly 440. The scraper shaft 441 is rotatably supported and connected to the mounting bracket 412 through bearings. The drive component 411 may include a drive motor or a drive motor with a reducer, or other components such as a hydraulic motor that can drive the scraper assembly 440 to rotate, and is not limited to the forms listed in this embodiment.
[0030] like Figures 5-8 As shown, in some embodiments, the scraper assembly 440 includes a shaft sealing structure 460, a scraper shaft 441, and a plurality of scrapers 442; wherein, the shaft sealing structure 460 is sealed between the housing 430 and the scraper drive assembly 410, specifically, the shaft sealing structure 460 is located within the mounting bracket 412; the scraper shaft 441 is vertically rotatably disposed on the housing 430, and one end of the scraper shaft 441 extends out of the housing 430 and seals through the shaft sealing structure 460, and is drivenly connected to the drive component 411 of the scraper drive assembly 410, specifically, the scrapers... One end of the scraper shaft 441 extending out of the housing 430 is rotatably connected to the mounting bracket 412 via a bearing. The other end of the scraper shaft 441 extending into the housing 430 can rotatably abut against the bottom surface of the housing 430 or not contact the bottom surface of the housing 430. Multiple scrapers 442 are radially and evenly distributed on the scraper shaft 441. The scrapers 442 can be rectangular scrapers, and the surface of the scraper 442 is parallel to the axis of the scraper shaft 441. The number of scrapers 442 can be two, three, four, or more, to achieve continuous conveying of solid catalyst and improve conveying efficiency. The scraper shaft 441 extending out of the housing 430 is rotatably sealed by the rotating shaft sealing structure 460 to prevent high-temperature powdery solid catalyst from leaking out of the perforation of the material chamber 431 through the scraper shaft 441, keeping the surrounding environment clean and protecting the drive component 411 from damage caused by high temperature.
[0031] For example, such as Figure 9 As shown, this embodiment provides a specific rotating shaft sealing structure 460, which includes a sealing sleeve 463, a stuffing box 464, and a sealing gland 461. One end of the sealing sleeve 463 is sealed and fixed to the outer wall of the housing 430, specifically by welding or bonding. The sealing sleeve 463 is fitted over the outside of the scraper shaft 441, and an annular gap is formed between the inner wall of the sealing sleeve 463 and the outer wall of the scraper shaft 441. The stuffing box 464 fills the annular gap. The sealing gland 461 includes a fixed cover plate and a bushing. The bushing is fitted over the outside of the scraper shaft 441, and one end of the bushing extends into the annular gap and presses against the stuffing box 464. The cover plate is fastened to the end of the sealing sleeve 463 by fasteners 462, which can be bolts, screws, etc. This rotating shaft sealing structure 460 can achieve rotational sealing of the scraper shaft 441. Of course, the rotating shaft sealing structure 460 can also be other structures, such as a labyrinth seal, and is not limited to the forms listed in this embodiment.
[0032] like Figure 5 and Figure 6As shown, in some embodiments, the cylinder wall of the powder discharge cylinder 600 forms a slope 640 that is inclined outward from bottom to top relative to the axis of the powder discharge cylinder 600 at a position below the powder inlet 630; the downward projection of the rotation amplitude of the scraper 442 is located on the slope 640, that is, the scraper 442 extends outward above the slope 640. By setting a ramp 640 below the powder inlet 630, the solid catalyst is facilitated to slide down the ramp 640 into the powder outlet cylinder 600, improving the smoothness of solid catalyst conveying and preventing material accumulation. The angle between the ramp 640 and the horizontal plane can be 45°~80°, and the angle between the ramp 640 and the horizontal plane is greater than the angle of repose of the powder. Specifically, it can be 45°, 50°, 55°, 60°, 65°, 70°, 75°, 80°, etc. This ensures the smooth descent of the solid catalyst while reducing the speed at which the solid catalyst falls into the powder outlet cylinder 600, which is beneficial for the upward blowing of high-pressure gas. In addition, the scraper 442 extends above the ramp 640, allowing the solid catalyst to fall directly onto the ramp 640 when pushed by the scraper 442 from the receiving channel 420 to the discharge port 432, preventing material accumulation in the material cavity 431 and affecting the discharge.
[0033] like Figure 5 and Figure 6 As shown, in some embodiments, the solid material scraper conveyor 400 further includes a heat insulation layer 450 disposed on the inner and / or outer wall of the housing 430. Since the temperature of the solid catalyst produced in the converter discharge scraper conveyor 100 reaches approximately 500°C, after the high-temperature solid catalyst enters the material chamber 431, the heat insulation layer 450 reduces heat transfer to the outside of the housing 430, minimizing the adverse effects of high temperature on the external environment and equipment, and protecting personnel safety. Furthermore, the high-temperature solid catalyst can be used for waste heat recovery in subsequent equipment, improving heat utilization efficiency, and the heat insulation layer 450 can reduce heat loss.
[0034] like Figures 1-6As shown, in some embodiments, the air supply duct 500 surrounds the outside of the powder outlet duct 600. The top of the powder outlet duct 600 extends out of the air supply duct 500, meaning the powder outlet 610 of the powder outlet duct 600 is located outside the air supply duct 500, and the bottom of the powder outlet duct 600 is located inside the air supply duct 500, meaning the air inlet 620 of the powder outlet duct 600 is located inside the air supply duct 500. The cross-sectional shape of the powder outlet duct 600 can be circular, rectangular, or polygonal, preferably circular. The cross-sectional shape of the air supply duct 500 can be circular, racetrack-shaped, etc., preferably racetrack-shaped, which facilitates the tangential spiral airflow of high-pressure gas within the air supply duct 500, thereby reducing air supply resistance, lowering air pressure loss, and improving air supply efficiency. One outer wall of the powder outlet cylinder 600 is tightly fixed to one inner wall of the air supply cylinder 500. The other outer wall of the powder outlet cylinder 600, the other inner wall of the air supply cylinder 500, and the bottom of the powder outlet cylinder 600 and the bottom of the air supply cylinder 500 together form an L-shaped channel 520. The upper part of the L-shaped channel 520 is connected to the air supply channel 510, and the lower part of the L-shaped channel 520 is connected to the air inlet 620. The corner of the L-shaped channel 520 is an arc transition connection to reduce air supply resistance and reduce air pressure loss.
[0035] During operation, high-pressure gas enters tangentially into the L-shaped channel 520 through the air supply channel 510, spirals downwards along the L-shaped channel 520 to its bottom, and finally enters the powder outlet cylinder 600 through the air inlet 620. Then, it is blown upwards, carrying the solid catalyst, and exits through the powder outlet 610 at the top, completing the solid catalyst transport. The air supply cylinder 500 and the powder outlet cylinder 600 are integrated together, resulting in a compact structure, small footprint, and convenient arrangement of the air supply channel 510. Furthermore, the air supply cylinder 500 surrounds the powder outlet cylinder 600, providing insulation and reducing the need for additional insulation structures. If the high-pressure gas introduced into the air supply cylinder 500 is high-temperature and high-pressure gas, it can further insulate the solid catalyst within the powder outlet cylinder 600. The high-temperature gas and high-temperature solid catalyst can then be fed into downstream equipment, such as a waste heat boiler, for heat recovery and utilization, improving heat utilization efficiency.
[0036] Of course, the powder outlet cylinder 600 and the air supply cylinder 500 can also be set up independently for easy maintenance and repair.
[0037] like Figure 2 and Figure 6As shown, in some embodiments, the flow cross-section of the air inlet 620 of the powder outlet cylinder 600 gradually increases from bottom to top. This causes the lower end of the L-shaped channel 520 to form a Venturi-like structure with the air inlet 620 of the powder outlet cylinder 600. When the high-pressure gas passes through the air inlet 620, it can accelerate the air velocity entering the powder outlet cylinder 600 and prevent the powder entering the powder outlet cylinder 600 from falling out.
[0038] Furthermore, in some embodiments, high-pressure gas can be blown into the inlet of the air supply channel 510 by a blower. In addition to introducing high-pressure gas through the air supply channel 510, a blower can be installed at the powder outlet 610 of the powder outlet cylinder 600. Under the suction action of the blower, the wind speed of the powder outlet cylinder 600 can be further increased, and the powder can be further prevented from falling off.
[0039] like Figure 4 As shown, in some embodiments, the air supply duct 510 is disposed on the same side of the air supply cylinder 500 and the powder outlet duct 600. The axis of the air supply duct 510 is perpendicular to the axis of the air supply cylinder 500, and the axis of the air supply duct 510 is parallel to the coplanar axis of the air supply cylinder 500 and the powder outlet duct 600. The inlet 511 of the air supply duct 510 faces the powder outlet duct 600, and the outlet airflow direction of the air supply duct 510 is tangential to the cylinder wall of the air supply cylinder 500. This arrangement is more compact, occupies less space, and enables tangential air intake and spiral air delivery from the air supply duct 510 to the air supply cylinder 500, reducing air intake resistance and air pressure loss.
[0040] like Figure 10 and Figure 11 As shown, in some embodiments, the air supply channel 510 surrounds part of the cylinder wall of the air supply cylinder 500. The inner wall of the air supply channel 510 and the two side walls of the air supply cylinder 500 form two gas passages 512. The two gas passages 512 share the inlet 511 of one air supply channel 510, and the outlet airflow direction of each gas passage 512 is tangential to the cylinder wall of the air supply cylinder 500. This arrangement of the air supply channel 510 is more compact, further reducing space occupation. When high-pressure, high-temperature gas is introduced through the gas passages 512 on both sides, the air supply channel 510 is partially surrounded, improving the insulation effect and reducing heat loss. Furthermore, the outlets of the gas passages 512 on both sides are tangential to the cylinder wall of the air supply cylinder 500, achieving tangential air intake and spiral air delivery, reducing air intake resistance and air pressure loss.
[0041] like Figure 1As shown, in some embodiments, the catalytic cracking catalyst separation and conveying device further includes a controller and multiple sensors 200; wherein, the multiple sensors 200 are arranged at intervals along the discharge direction of the discharge channel 110 on the inner wall of the discharge channel 110, and the level of solid catalyst located in the discharge channel 110 is detected by the multiple sensors 200; the controller is connected to the sensors 200 and the solid material scraper conveyor 400, specifically connected to the drive component 411 of the scraper drive assembly 410, and is used to control the material conveying speed of the solid material scraper conveyor 400 according to the material level.
[0042] During the separation and conveying of solid catalyst, based on the material level of solid catalyst detected by multiple sensors 200 in the discharge channel 110, if the material level of solid catalyst in the discharge channel 110 is detected to be low, the controller is triggered to control the power of the drive component 411 to reduce, thereby reducing the rotation speed of the scraper assembly 440, so as to slow down the conveying of solid catalyst and avoid the discharge channel 110 and the receiving channel 420 not being effectively sealed by solid catalyst due to the solid catalyst falling too fast, which would affect the separation effect of solid catalyst and reaction gas.
[0043] If the level of solid catalyst in the discharge channel 110 is detected to be high, the controller is triggered to increase the power of the drive component 411, thereby increasing the rotation speed of the scraper assembly 440 to accelerate the conveying of solid catalyst, increase the conveying volume of solid catalyst, and prevent the solid catalyst from being severely accumulated in the discharge channel 110, which would affect the discharge speed.
[0044] For example, sensor 200 can be a temperature sensor used to detect the temperature of the solid catalyst in contact with it. When the temperature detected by the temperature sensor is within the temperature threshold of the solid catalyst, it is determined that the temperature sensor is in contact with the solid catalyst to obtain the level of the solid catalyst located in the discharge channel 110.
[0045] Specifically, taking three temperature sensors as an example, they are arranged at intervals along the height direction on the inner wall of the discharge channel 110. The temperature threshold of the solid catalyst is about 500°C. When all three temperature sensors detect a temperature of about 500°C, it means that all three temperature sensors are in contact with the solid catalyst. At this time, the material level of the solid catalyst in the discharge channel 110 is higher than or level with the position of the uppermost temperature sensor. At this time, the material level is high, which can trigger the controller to increase the power of the drive component 411 to increase the rotation speed of the scraper assembly 440 and speed up the conveying of the solid catalyst.
[0046] When only the temperature sensor at the bottom detects a temperature of around 500℃, while the temperatures detected by the two temperature sensors above are not in the range of around 500℃, it indicates that only the temperature sensor at the bottom is in contact with the solid catalyst. At this time, the level of the solid catalyst in the discharge channel 110 is higher than or equal to the position of the bottom temperature sensor, but lower than the position of the temperature sensor in the middle. Since the level is low, the controller can trigger the power of the drive component 411 to reduce the rotation speed of the scraper assembly 440, thereby slowing down the conveying speed of the solid catalyst. This causes the level of the solid catalyst in the discharge channel 110 to gradually rise, ensuring a good gas-phase seal of the solid catalyst in the discharge channel 110.
[0047] When the two temperature sensors at the bottom detect a temperature of around 500℃, while the temperature sensor at the top detects a temperature outside the range of around 500℃, it indicates that only the two temperature sensors at the bottom are in contact with the solid catalyst. At this time, the level of the solid catalyst in the discharge channel 110 is higher than or equal to the position of the middle temperature sensor, but lower than the position of the top temperature sensor. This moderate level can trigger the controller to control the power of the drive component 411 to maintain stability, thereby stabilizing the rotation speed of the scraper assembly 440, achieving stable delivery of the solid catalyst, and maintaining a good gas phase seal.
[0048] As another example, sensor 200 can also be a level sensor, used to detect the level of solid catalyst located in the discharge channel 110. The level sensor can be a capacitive level sensor, a resistive level sensor, an ultrasonic level sensor, etc. These level sensors detect the level of solid catalyst according to their own working principles, which will not be elaborated further here.
[0049] By setting up sensors and controllers, the rotation speed of the scraper assembly can be automatically controlled according to the level of solid catalyst in the discharge channel, the good gas phase seal of the discharge channel can be maintained automatically, the solid catalyst and the reaction gas can be effectively separated, and the solid catalyst can be automatically and quantitatively transported.
[0050] In some embodiments, the wall of the air supply duct is provided with an insulation layer. This insulation layer further improves the heat insulation effect, reduces heat transfer to the outside, minimizes the adverse effects of high temperatures on the external environment and equipment, and protects personnel safety. Furthermore, it insulates the high-temperature solid catalyst and high-temperature gas, reducing heat loss and facilitating waste heat recovery in subsequent equipment, thereby improving heat utilization efficiency.
[0051] like Figure 4As shown, in some embodiments, there is an angle α between the coplanar plane of the axis of scraper shaft 441 and the axis of powder discharge cylinder 600 and the coplanar plane of the axis of powder discharge cylinder 600 and the axis of air supply cylinder 500. That is, the axis of scraper shaft 441, the axis of powder discharge cylinder 600 and the axis of air supply cylinder 500 are not in the same plane. The included angle α can be 30°~60°, specifically 30°, 35°, 40°, 45°, 50°, 55°, 60°, etc. This setting can shorten the dimensions of air supply cylinder 500, powder discharge cylinder 600 and solid material scraper conveyor 400 in the arrangement direction, so as to make the structure more compact and facilitate installation and arrangement.
[0052] Furthermore, such as Figure 5 and Figure 8 As shown, in some embodiments, the plane coplanarity between the outlet of the receiving channel 420 and the axis of the scraper shaft 441 and the plane coplanarity between the axis of the scraper shaft 441 and the axis of the powder discharge cylinder 600, exists at an angle β. That is, the arrangement of the receiving channel 420, the housing 430, and the powder discharge cylinder 600 is not on a straight line, in order to further shorten the dimensions of the air supply cylinder 500, the powder discharge cylinder 600, and the solid material scraper conveyor 400 in the arrangement direction, making the structure more compact and adaptable to installation environments with limited space. In addition, shortening the distance between the outlet of the receiving channel 420 and the powder inlet 630 of the powder discharge cylinder 600 allows the scraper assembly 440 to rotate at a smaller angle, enabling the transfer of powder from the outlet of the receiving channel 420 to the powder inlet 630 of the powder discharge cylinder 600, and reducing the rotational torque of the scraper assembly 440.
[0053] like Figure 1 , Figures 3-5 As shown, in some embodiments, the catalytic cracking catalyst separation and conveying device further includes a support plate 700 fixedly disposed at the waist position of the air supply cylinder 500 and the powder discharge cylinder 600. The housing 430 of the solid material scraper conveyor 400 is located below the support plate 700, and the scraper drive assembly 410 is located above the support plate 700. The support plate 700 is used to support and fix the entire device. When the support plate 700 is placed on the support platform, which serves as a walking platform for the operator, the upper parts of the air supply cylinder 500 and the powder discharge cylinder 600 are located above the support platform, and the lower parts of the powder discharge cylinder 600 and the air supply cylinder 500 are located below the support platform, thereby making full use of the height space.
[0054] In the description of the above embodiments, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.
[0055] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.
Claims
1. A catalytic cracking catalyst separation and conveying device, characterized in that, include: A converter discharge scraper is provided with a discharge channel at the bottom for discharging solid catalyst, and an exhaust port on the cylinder wall for discharging reaction gases. A solid material scraper conveyor has a receiving channel and a discharge port, the receiving channel being connected to the discharge channel, and the solid material scraper conveyor is used to convey the solid catalyst from the receiving channel to the discharge port; A shut-off valve is installed at the connection between the discharge channel and the receiving channel to control the connection or disconnection of the discharge channel and the receiving channel; The powder discharge cylinder has a powder discharge port at the top, an air inlet at the bottom, and a powder inlet on its wall. The solid material scraper is fixed to the outside of the cylinder wall, and the discharge port is connected to the powder inlet. An air supply cylinder is arranged in parallel with and fixedly connected to the powder outlet cylinder. The upper part of the air supply cylinder is provided with an air supply channel for introducing high-pressure gas, and the lower part of the air supply cylinder is connected to the air inlet.
2. The catalytic cracking catalyst separation and conveying device according to claim 1, characterized in that, The solid material scraper conveyor includes: The shell has a communicating material cavity and the discharge port, and the shell is fixed to the outer wall of the powder discharge cylinder; The receiving channel, the lower end of the receiving channel is connected to the material cavity; A scraper assembly is rotatably disposed within the material chamber, and the scraper assembly is used to push the solid catalyst from the receiving channel to the discharge port; A scraper drive assembly is located outside the housing and is drivenly connected to the scraper assembly to drive the scraper assembly to rotate.
3. The catalytic cracking catalyst separation and conveying device according to claim 2, characterized in that, The scraper assembly includes: A rotating shaft sealing structure is provided between the housing and the scraper drive assembly; A scraper shaft is vertically rotatably mounted on the housing, with one end of the scraper shaft extending out of the housing and sealingly passing through the rotating shaft sealing structure, and is drivenly connected to the scraper drive assembly; Multiple scrapers are arranged radially and evenly on the scraper shaft.
4. The catalytic cracking catalyst separation and conveying device according to claim 3, characterized in that, The cylinder wall of the powder outlet body forms a sloping surface that is inclined outward from bottom to top relative to the axis of the powder outlet body at a position below the powder inlet; the downward projection of the rotation amplitude of the scraper is located on the sloping surface.
5. The catalytic cracking catalyst separation and conveying device according to claim 3, characterized in that, The shaft sealing structure includes: A sealing sleeve, one end of which is sealed and fixed to the outer wall of the housing, and the sealing sleeve is sleeved on the outside of the scraper shaft; A stuffing box is used to fill the annular gap between the sealing sleeve and the scraper shaft. A sealing gland, one end of which extends into the sealing sleeve and presses against the stuffing gland, is securely connected to the end of the sealing sleeve by fasteners.
6. The catalytic cracking catalyst separation and conveying device according to claim 2, characterized in that, The solid material scraper also includes a heat insulation layer disposed on the inner wall and / or outer wall of the housing; And / or, the wall of the air supply cylinder is provided with a heat insulation layer.
7. The catalytic cracking catalyst separation and conveying device according to claim 1, characterized in that, The air supply cylinder is surrounded outside the powder outlet cylinder, the top of the powder outlet cylinder extends out of the air supply cylinder, and the bottom of the powder outlet cylinder is located inside the air supply cylinder. One side of the powder outlet cylinder is fixedly attached to one side of the inner wall of the air supply cylinder. The other side of the powder outlet cylinder, the other side of the inner wall of the air supply cylinder, and the bottom of the powder outlet cylinder and the bottom of the air supply cylinder form an L-shaped channel. The upper part of the L-shaped channel is connected to the air supply channel, and the lower part of the L-shaped channel is connected to the air inlet.
8. The catalytic cracking catalyst separation and conveying device according to claim 7, characterized in that, Along the direction from bottom to top, the flow cross-section of the air inlet of the powder outlet cylinder gradually increases.
9. The catalytic cracking catalyst separation and conveying device according to claim 1, characterized in that, The air supply channel is located on the same side of the air supply cylinder and the powder outlet channel. The axis of the air supply channel is perpendicular to the axis of the air supply cylinder, and the outlet air direction of the air supply channel is tangent to the cylinder wall of the air supply cylinder. Alternatively, the air supply channel surrounds both sides of the cylinder wall of the air supply cylinder, and the inner wall of the air supply channel and the two side cylinder walls of the air supply cylinder form two gas passages. The two gas passages share the inlet of one air supply channel, and the outlet airflow of each gas passage is tangent to the cylinder wall of the air supply cylinder.
10. The catalytic cracking catalyst separation and conveying device according to any one of claims 1-9, characterized in that, Also includes: Multiple sensors are arranged at intervals on the inner wall of the discharge channel along the discharge direction to detect the level of the solid catalyst in the discharge channel. A controller, connected to the sensor and the solid material scraper conveyor, is used to control the material conveying speed of the solid material scraper conveyor according to the material level.
11. The catalytic cracking catalyst separation and conveying device according to claim 10, characterized in that, The sensor is a temperature sensor, which is used to detect the temperature of the solid catalyst in contact with it. When the temperature detected by the temperature sensor is within the temperature threshold of the solid catalyst, it is determined that the temperature sensor is in contact with the solid catalyst to obtain the material level of the solid catalyst in the discharge channel. Alternatively, the sensor may be a level sensor, which is used to detect the level of the solid catalyst located in the discharge channel.