Fluid guide anti-erosion protection structure of powder feeding pipe of fluidized bed reactor

Abstract

The present application relates to the technical field of polycrystalline silicon cold hydrogenation production equipment, in particular to a flow guide anti-erosion protection structure of a fluidized bed reactor powder feeding pipe, which comprises a flow guide mechanism and a locking mechanism; the flow guide mechanism is installed below a powder feeding flow guide connector and is connected with a positioning seat on the inner wall of a reactor pressure cylinder; the locking mechanism is connected with the reactor pressure cylinder and is used for multiple locking of the flow guide mechanism. The flow guide mechanism comprises a bottom plate and flow guide plates symmetrically arranged on both sides of the bottom plate, the flow guide plates are connected with the bottom plate through plug-in assemblies to form an axis-symmetric V-shaped folded surface flow guide structure, and the inner side of the bottom plate is provided with a transmission control assembly for locking of the flow guide plates in cooperation with the locking mechanism to drive the plug-in assemblies. The V-shaped folded surface flow guide structure converts vertical erosion into tangential sliding, effectively reduces the erosion damage of powder particles to the feeding pipe, cooperates with the multiple locking mechanism to ensure the structural stability, significantly prolongs the service life of the equipment, and ensures the safe operation of the reactor.

Description

Technical Field

[0001] This invention relates to the technical field of polycrystalline silicon cold hydrogenation production equipment, specifically a flow-guiding and erosion-resistant protective structure for the powder feed pipe of a fluidized bed reactor. Background Technology

[0002] In the complete process system of solid-phase catalytic conversion of polycrystalline silicon cold hydrogenation, the powder feed guide pipe configured in the fluidized bed reaction unit needs to be embedded into the pressure chamber of the reactor by 300-500 mm. The embedding depth is matched with the nominal diameter parameter of the reaction cylinder to achieve homogeneous distribution of solid silicon powder and suppress the generation of two-phase flow segregation eddies.

[0003] The axial clearance between the lower end of the powder guide pipe and the gas-phase distribution spray component at the bottom of the reactor is extremely small. Under long-term steady-state operation of the unit, the gas-solid two-phase jet at the bottom carries high-hardness silica powder solid particles, forming a high-speed erosion flow field. This continuously creates a coupled damage effect of particle erosion and fluid erosion on the outer wall of the feed pipe along the vertical direction. The research results show that the erosion damage of the gas-solid two-phase flow bend and pipeline system is directly related to the normal operation of the pipeline system and the pipeline life. The most severely eroded area of ​​the bend often exhibits a V-shaped erosion morphology, which is determined by the unique movement trajectory and secondary collision of particles in the pipeline. Under the continuous impact of high-hardness particles, the pipe wall thickness gradient becomes thinner, and local penetrating corrosion defects are prone to occur under extreme operating conditions. Once the high-temperature flammable and explosive chlorosilane and hydrogen multi-phase gaseous media inside the pressure shell escapes outward through corrosion defects, it will undergo an oxidation chain reaction with atmospheric components, which can easily cause major process safety accidents such as deflagration and fire, posing a systemic risk to the continuous operation stability of the complete set of equipment and the safety of on-site personnel.

[0004] Currently, similar fluidized bed powder feed pipes in the industry are not equipped with integrated protective components with long-term flow guiding and erosion resistance functions, which cannot eliminate the problem of long-term gas-solid two-phase coupling erosion and degradation from the perspective of flow field dynamics. Therefore, in view of the above situation, it is urgent to develop a flow guiding and erosion resistance protection structure for fluidized bed reactor powder feed pipes to overcome the shortcomings in current practical applications. Summary of the Invention

[0005] The purpose of this invention is to provide a flow-guiding and erosion-resistant protective structure for the powder feed pipe of a fluidized bed reactor, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A flow-guiding and erosion-resistant protective structure for a powder feed pipe in a fluidized bed reactor, comprising:

[0008] The flow guiding mechanism is installed in the area directly below the axial direction of the powder feed flow guiding pipe and is engaged with the positioning seat fixedly installed on the inner wall of the reactor pressure cylinder.

[0009] A locking mechanism is connected to the reactor pressure-bearing cylinder and is used to cooperate with the reactor pressure-bearing cylinder to complete multiple locking of the positioned flow guiding mechanism.

[0010] The flow guiding mechanism includes a base plate and flow guiding plates symmetrically arranged on both sides of the base plate. The flow guiding plates are connected to the base plate through plug-in components to form an axisymmetric V-shaped folded flow guiding structure. A transmission and control component is provided on the inner side of the base plate to cooperate with the locking mechanism to drive the plug-in components and lock the flow guiding plates.

[0011] As a further aspect of the present invention: the plug-in assembly includes a plug block fixedly disposed on the outside of the guide plate, the plug block being plugged into the plug holes disposed on the side walls of the bottom plate, baffles symmetrically disposed on the inner side of the plug block, a connecting plate slidably connected to the plug block being fixedly disposed on the outer side of the baffle, a spring being fixedly disposed between the connecting plate and the plug block, a second piston tube being fixedly disposed on the inner side of the plug block, one end of the second piston tube being disposed opposite to the transmission and control assembly, and a control piston being fixedly disposed on the outer side of the other end, the control piston being slidably connected to a control groove disposed on the inner side of the baffle, for cooperating with the transmission and control assembly to realize the extension and retraction of the baffle.

[0012] As a further aspect of the present invention: the plug-in assembly further includes a control block disposed on the inner side of the base plate, a transmission column fixedly disposed on the outer side of the top of the control block, a limit rod fixedly disposed on the inner side of the transmission column, the limit rod being slidably connected to a fixed frame fixedly disposed on the inner side of the base plate, a spring being fixedly disposed between the fixed frame and the transmission column, an elliptical turntable being rotatably disposed on the outer side of the top of the transmission column, a limit slot cooperating with the elliptical turntable being disposed on the top wall of the base plate, and locking blocks being disposed on both sides of the control block, the locking blocks being slidably connected to a guide frame fixedly disposed on the inner side of the base plate, a control rod being rotatably disposed on the locking block, the other end of the control rod being rotatably connected to the control block, for cooperating with the downward movement of the control block to lock the plug-in after plugging.

[0013] As a further embodiment of the present invention: the transmission and control assembly includes a transmission box fixedly disposed on the inner side of the base plate, and symmetrically arranged sub-control cavities on the inner side of the transmission box. The sub-control cavities are connected to a first piston tube fixedly disposed on the transmission box. A first piston component is slidably disposed on the inner side of the first piston tube. The other end of the first piston component is fixedly connected to a transmission and control block. The transmission and control block is slidably connected to a guide block fixedly disposed on the inner side of the base plate. The sub-control cavities are also connected to a control tube fixedly disposed on the transmission box. A drive piston is fixedly disposed on the outer side of the other end of the control tube. The drive piston is slidably connected to a drive groove disposed on the inner side of the movable frame. The movable frame is slidably connected to a limiting plate fixedly disposed on the inner side of the base plate. A second piston component is fixedly disposed on the outer side of the movable frame opposite to the second piston tube.

[0014] As a further aspect of the present invention: the locking mechanism includes a drive box fixedly disposed on the outside of the reactor pressure-bearing cylinder, a motor fixedly disposed on the inside of the drive box, the output end of the motor being fixedly connected to a drive gear, the drive gear meshing with a first gear disposed on the outside of the annular frame, the annular frame surrounding the inner wall of the reactor pressure-bearing cylinder, a second gear also surrounding the outside of the annular frame, the second gear meshing with a driven gear fixedly disposed on the outside of the threaded rod, the threaded rod being rotatably connected to a mounting seat fixedly disposed on the inner wall of the reactor pressure-bearing cylinder, and the threaded rod being connected to a clamping assembly disposed on the inner side of the reactor pressure-bearing cylinder, used to cooperate with the rotation of the threaded rod to complete the clamping of the bottom plate and the guide plate, and simultaneously complete the driving of the transmission and control assembly.

[0015] As a further aspect of the present invention: the clamping assembly includes sealing clamps symmetrically arranged inside the reactor pressure-bearing cylinder, the sealing clamps being slidably connected to the inner wall of the reactor pressure-bearing cylinder and slidably connected to a guide plate arranged inside the reactor pressure-bearing cylinder, a lifting frame slidably arranged inside the reactor pressure-bearing cylinder wall and threadedly connected to a threaded rod, the lifting frame being connected to the sealing clamps via a connecting rod, and a protrusion provided on the side of the sealing clamps near the bottom plate, the protrusion being able to be inserted into the inner side of the bottom plate to complete the driving of the transmission and control assembly.

[0016] As a further aspect of the present invention: the cross-section of the base plate is an isosceles trapezoidal structure, and the angle between its two inclined surfaces and the horizontal plane is 45° to 60°.

[0017] As a further aspect of the present invention, the surface of the guide plate is provided with a wear-resistant ceramic coating.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] This invention incorporates a flow guiding mechanism and a locking mechanism. The flow guiding mechanism, employing an axisymmetric V-shaped folded surface structure, effectively alters the impact direction of the gas-solid two-phase flow, transforming vertical erosion into tangential sliding along the surface of the guide plate. This significantly reduces the direct erosion energy of powder particles on the outer wall of the feed pipe. The plug-in assembly enables rapid assembly and disassembly of the guide plate and base plate, facilitating maintenance and replacement. The locking mechanism, in synergy with the control components, provides multiple locking mechanisms for the flow guiding mechanism, ensuring its positional stability and structural reliability under high-speed gas-solid two-phase flow impact. The overall structure is rationally designed, easy to install and maintain, and effectively addresses the problem of long-term gas-solid two-phase coupling erosion degradation from a flow field dynamics perspective. This significantly extends the service life of the powder feed pipe and ensures the safe and stable operation of the reactor. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the flow-guiding and erosion-resistant protection structure of the powder feed pipe in a fluidized bed reactor.

[0021] Figure 2 for Figure 1 A magnified structural diagram of point A in the middle.

[0022] Figure 3 This is a schematic diagram of the flow guiding mechanism in the flow guiding and erosion-resistant protection structure of the powder feed pipe of a fluidized bed reactor.

[0023] Figure 4 for Figure 3 A magnified structural diagram at point B in the middle.

[0024] Figure 5 This is a schematic diagram of the elliptical rotating disk in the flow guiding and erosion-resistant protection structure of the powder feed pipe in a fluidized bed reactor.

[0025] In the diagram: 1. Reactor pressure vessel; 2. Powder feed guide pipe; 3. Bottom plate; 4. Guide plate; 5. Transmission box; 6. First piston tube; 7. First piston component; 8. Control block; 9. Drive box; 10. Motor; 11. Guide plate; 12. Sealing clamp; 13. Ring frame; 14. First gear; 15. Second gear; 16. Threaded rod; 17. Lifting frame; 18. Connecting rod; 19. Limiting rod; 20. Guide block; 21. Positioning seat; 22. Control pipe; 23. Movable frame; 24. Limiting plate; 25. Second piston component; 26. Control rod; 27. Control block; 28. Insertion block; 29. ​​Second piston tube; 30. Baffle; 31. Connecting plate; 32. Locking block; 33. Guide frame; 34. Elliptical turntable; 35. Transmission column; 36. Fixed frame. Detailed Implementation

[0026] The technical solution of this application will be further described in detail below with reference to specific embodiments.

[0027] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0028] Please see Figure 1In one embodiment of the present invention, a flow guiding and erosion-resistant protection structure for a powder feed pipe of a fluidized bed reactor includes: a flow guiding mechanism, which is installed in the region directly below the axial direction of the powder feed flow guiding pipe 2 and engages with a positioning seat 21 fixedly disposed on the inner wall of the reactor pressure-bearing cylinder 1; and a locking mechanism, which is connected to the reactor pressure-bearing cylinder 1 and is used to cooperate with the reactor pressure-bearing cylinder 1 to complete multiple locking of the positioned flow guiding mechanism; wherein, the flow guiding mechanism includes a base plate 3 and flow guiding plates 4 symmetrically disposed on both sides of the base plate 3, the flow guiding plates 4 being connected to the base plate 3 through plug-in components to form an axisymmetric V-shaped folded flow guiding structure, and a transmission and control component is disposed on the inner side of the base plate 3 to cooperate with the locking mechanism to complete the driving of the plug-in components and realize the locking of the flow guiding plates 4. In this embodiment, the cross-section of the base plate 3 is an isosceles trapezoidal structure, and the angle between its two inclined surfaces and the horizontal plane is preferably 45° to 60°. The surface of the flow guiding plates 4 is provided with a wear-resistant ceramic coating to enhance the erosion resistance.

[0029] Please see Figure 3 and Figure 4 The insertion assembly includes an insertion block 28 fixedly disposed on the outer side of the guide plate 4. The insertion block 28 is inserted into insertion holes disposed on the side walls of the base plate 3. A baffle 30 is symmetrically disposed on the inner side of the insertion block 28. A connecting plate 31 is fixedly disposed on the outer side of the baffle 30 and slidably connected to the insertion block 28. A spring is fixedly disposed between the connecting plate 31 and the insertion block 28. A second piston tube 29 is fixedly disposed on the inner side of the insertion block 28. One end of the second piston tube 29 is disposed opposite to the transmission and control assembly, and a control piston is fixedly disposed on the outer side of the other end. The control piston is slidably connected to a control groove disposed on the inner side of the baffle 30, and is used to cooperate with the transmission and control assembly to realize the extension and retraction of the baffle 30. In this embodiment, when the insertion block 28 is inserted into the inner side of the insertion hole, the locking mechanism can cooperate with the transmission and control assembly to drive the air inside the second piston tube 29 into the inner side of the control groove, and cooperate with the control piston to drive the baffle 30 to extend. The baffle 30 cooperates with the inner wall of the insertion block 28 to lock the guide plate 4, ensuring the stability and reliability of the guide plate 4 during use.

[0030] Please see Figure 1 and Figure 5The plug-in assembly also includes a control block 27 disposed on the inner side of the base plate 3. A transmission column 35 is fixedly disposed on the outer side of the top of the control block 27. A limit rod 19 is fixedly disposed on the inner side of the transmission column 35. The limit rod 19 is slidably connected to a fixed frame 36 fixedly disposed on the inner side of the base plate 3. A spring is fixedly disposed between the fixed frame 36 and the transmission column 35. An elliptical turntable 34 is rotatably disposed on the outer side of the top of the transmission column 35. A limit slot that cooperates with the elliptical turntable 34 is disposed on the top wall of the base plate 3. A locking block 32 is disposed on both sides of the control block 27. The locking block 32 is slidably connected to a guide frame 33 fixedly disposed on the inner side of the base plate 3. A transmission control rod 26 is rotatably disposed on the locking block 32. The other end of the transmission control rod 26 is rotatably connected to the control block 27 to lock the plug-in block 28 after plugging in, in coordination with the downward movement of the control block 27. In this embodiment, after the insertion block 28 is inserted, the elliptical turntable 34 is pressed. The elliptical turntable 34 drives the control block 27 to move downward through the transmission control column 26. The control block 27 drives the locking block 32 to lock into the inside of the insertion block 28 through the transmission control rod 26, thus locking the insertion block 28. Then, the elliptical turntable 34 is rotated to enter the limiting slot located in the top plate wall of the bottom plate 3, thus locking the elliptical turntable 34, thereby ensuring the effectiveness of the locking block 32 in locking the insertion block 28.

[0031] Please see Figure 1 and Figure 3The transmission and control assembly includes a transmission box 5 fixedly disposed inside the base plate 3. Symmetrical control chambers are arranged inside the transmission box 5. Each control chamber is connected to a first piston tube 6 fixedly disposed on the transmission box 5. A first piston element 7 is slidably disposed inside the first piston tube 6. The other end of the first piston element 7 is fixedly connected to a transmission block 8. The transmission block 8 is slidably connected to a guide block 20 fixedly disposed inside the base plate 3. The control chambers are also connected to a control tube 22 fixedly disposed on the transmission box 5. A drive piston is fixedly disposed on the outer side of the other end of the control tube 22. The drive piston is slidably connected to a drive groove disposed inside the movable frame 23. The movable frame 23 is slidably connected to a limiting plate 24 fixedly disposed inside the base plate 3. A second piston element 25, opposite to the second piston tube 29, is fixedly disposed on the outer side of the movable frame 23. In this embodiment, the first piston 7 includes a first piston slidably disposed inside the first piston tube 6 and a first push rod fixedly connected to the first piston. The other end of the first push rod is fixedly connected to the control block 8. The second piston 25 includes a second piston slidably disposed inside the second piston tube 29 and a second push rod fixedly connected to the second piston. The other end of the second push rod is fixedly connected to the movable frame 23. After the insertion block 28 is installed, the second piston 25 is positioned opposite to the second piston tube 29. After the bottom plate 3 is installed inside the reactor pressure cylinder 1 through the positioning seat 21, the locking mechanism can drive the control block 8 to move inward. The control block 8 drives the first piston 7 to move inside the first piston tube 6. The movable frame 23 is driven to move along the limiting plate 24 through the sub-control chamber and the driving piston. The movable frame 23 drives the second piston 25 into the inside of the second piston tube 29, completing the driving of the baffle 30 and realizing multiple locking of the guide plate 4.

[0032] Please see Figure 1 and Figure 2The locking mechanism includes a drive box 9 fixedly installed on the outside of the reactor pressure-bearing cylinder 1. A motor 10 is fixedly installed inside the drive box 9. The output end of the motor 10 is fixedly connected to the drive gear. The drive gear meshes with a first gear 14 installed on the outside of the annular frame 13. The annular frame 13 is arranged around the inner wall of the reactor pressure-bearing cylinder 1. A second gear 15 is also arranged around the outside of the annular frame 13. The second gear 15 meshes with a driven gear fixed on the outside of the threaded rod 16. The threaded rod 16 is rotatably connected to a mounting seat fixed on the inner wall of the reactor pressure-bearing cylinder 1. The threaded rod 16 is connected to a clamping assembly installed on the inner side of the reactor pressure-bearing cylinder 1. The threaded rod 16 is used to cooperate with the rotation of the threaded rod 16 to clamp the bottom plate 3 and the guide plate 4, and simultaneously drive the transmission and control assembly. In this embodiment, the motor 10 achieves the rotation of the ring frame 13 through the active gear and the first gear 14, and the ring frame 13 achieves the rotation of the threaded rod 16 through the second gear 15 and the driven gear, thereby completing the drive of the clamping assembly. The clamping assembly can clamp and fix the bottom plate 3 and the two ends of the guide plate 4 from both sides, and can simultaneously drive the transmission and control assembly, ensuring the stability and reliability of the guide mechanism during use.

[0033] Please see Figure 2 The clamping assembly includes sealing clamps 12 symmetrically arranged inside the reactor pressure-bearing cylinder 1. The sealing clamps 12 are slidably connected to the inner wall of the reactor pressure-bearing cylinder 1 and slidably connected to the guide plate 11 arranged inside the reactor pressure-bearing cylinder 1. A lifting frame 17 threadedly connected to the threaded rod 16 is slidably arranged inside the cylinder wall of the reactor pressure-bearing cylinder 1. The lifting frame 17 is connected to the sealing clamps 12 through a connecting rod 18. A protrusion is provided on the side of the sealing clamps 12 near the bottom plate 3. The protrusion can be inserted into the inner side of the bottom plate 3 to complete the driving of the transmission and control assembly. In this embodiment, the threaded rod 16 drives the lifting frame 17 to move upward. The lifting frame 17 drives the sealing clamp 12 to move along the guide plate 11 through the connecting rod 18. The sealing clamps 12 on both sides cooperate to clamp and lock the bottom plate 3 and the guide plate 4. At the same time, the protrusion on the sealing clamp 12 is inserted into the inside of the bottom plate 3 to drive the control block 8, thereby achieving full locking of the guide plate 4 by the baffle 31 and ensuring the stability of the guide mechanism during operation.

[0034] The above are merely preferred embodiments of the present invention. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention, and these should also be considered within the scope of protection of the present invention. These will not affect the effectiveness of the implementation of the present invention or the practicality of the patent.

Claims

1. A flow-guiding and erosion-resistant protective structure for a powder feed pipe in a fluidized bed reactor, characterized in that, include: The flow guiding mechanism is installed in the area directly below the powder feed flow guiding pipe (2) and is engaged with the positioning seat (21) fixed on the inner wall of the reactor pressure cylinder (1). A locking mechanism is connected to the reactor pressure cylinder (1) and is used to cooperate with the reactor pressure cylinder (1) to complete multiple locking of the positioned flow guiding mechanism; The flow guiding mechanism includes a base plate (3) and flow guiding plates (4) symmetrically arranged on both sides of the base plate (3). The flow guiding plates (4) are connected to the base plate (3) through plug-in components to form an axisymmetric V-shaped folded flow guiding structure. A transmission and control component is provided on the inner side of the base plate (3) to cooperate with the locking mechanism to drive the plug-in components and lock the flow guiding plates (4).

2. The flow-guiding and erosion-resistant protective structure for the powder feed pipe of the fluidized bed reactor according to claim 1, characterized in that, The plug-in assembly includes a plug block (28) fixedly disposed on the outside of the guide plate (4). The plug block (28) is plugged into the plug holes disposed on the two side walls of the bottom plate (3). A baffle (30) is symmetrically disposed on the inside of the plug block (28). A connecting plate (31) is fixedly disposed on the outside of the baffle (30) and slidably connected to the plug block (28). A spring is fixedly disposed between the connecting plate (31) and the plug block (28). A second piston tube (29) is fixedly disposed on the inside of the plug block (28). One end of the second piston tube (29) is disposed opposite to the transmission and control assembly. A control piston is fixedly disposed on the outside of the other end. The control piston is slidably connected to the control groove disposed on the inside of the baffle (30) to cooperate with the transmission and control assembly to realize the extension and retraction of the baffle (30).

3. The flow-guiding and erosion-resistant protective structure for the powder feed pipe of the fluidized bed reactor according to claim 2, characterized in that, The plug-in assembly also includes a control block (27) disposed on the inner side of the base plate (3). A transmission column (35) is fixedly disposed on the outer side of the top of the control block (27). A limit rod (19) is fixedly disposed on the inner side of the transmission column (35). The limit rod (19) is slidably connected to a fixing frame (36) fixedly disposed on the inner side of the base plate (3). A spring is fixedly disposed between the fixing frame (36) and the transmission column (35). An elliptical turntable (34) is rotatably disposed on the outer side of the top of the transmission column (35). The top plate of the base plate (3) is provided with a limiting slot that cooperates with the elliptical turntable (34). Both sides of the control block (27) are provided with a locking block (32). The locking block (32) is slidably connected to the guide frame (33) fixedly set inside the base plate (3). A transmission control rod (26) is rotatably set on the locking block (32). The other end of the transmission control rod (26) is rotatably connected to the control block (27) to cooperate with the downward movement of the control block (27) to lock the plugged-in block (28) after insertion.

4. The flow-guiding and erosion-resistant protective structure for the powder feed pipe of the fluidized bed reactor according to claim 3, characterized in that, The transmission and control assembly includes a transmission box (5) fixedly installed inside the base plate (3). A sub-control chamber is symmetrically arranged inside the transmission box (5). The sub-control chamber is connected to a first piston tube (6) fixedly installed on the transmission box (5). A first piston component (7) is slidably arranged inside the first piston tube (6). The other end of the first piston component (7) is fixedly connected to a transmission block (8). The transmission block (8) is slidably connected to a guide block (20) fixedly installed inside the base plate (3). The sub-control chamber is also connected to a control tube (22) fixedly installed on the transmission box (5). A drive piston is fixedly arranged on the outer side of the other end of the control tube (22). The drive piston is slidably connected to a drive groove arranged inside the movable frame (23). The movable frame (23) is slidably connected to a limiting plate (24) fixedly installed inside the base plate (3). A second piston component (25) is fixedly arranged on the outer side of the movable frame (23) opposite to the second piston tube (29).

5. The flow-guiding and erosion-resistant protective structure for the powder feed pipe of the fluidized bed reactor according to claim 1, characterized in that, The locking mechanism includes a drive box (9) fixedly installed on the outside of the reactor pressure cylinder (1). A motor (10) is fixedly installed on the inside of the drive box (9). The output end of the motor (10) is fixedly connected to the drive gear. The drive gear meshes with the first gear (14) installed on the outside of the ring frame (13). The ring frame (13) is arranged around the inside of the cylinder wall of the reactor pressure cylinder (1). A second gear (15) is also arranged around the outside of the ring frame (13). The second gear (15) meshes with the driven gear fixedly installed on the outside of the threaded rod (16). The threaded rod (16) is rotatably connected to the mounting seat fixedly installed on the inside of the cylinder wall of the reactor pressure cylinder (1). The threaded rod (16) is connected to the clamping assembly installed on the inside of the reactor pressure cylinder (1) to cooperate with the rotation of the threaded rod (16) to complete the clamping of the bottom plate (3) and the guide plate (4) and simultaneously complete the driving of the transmission and control assembly.

6. The flow-guiding and erosion-resistant protective structure for the powder feed pipe of the fluidized bed reactor according to claim 5, characterized in that, The clamping assembly includes a sealing clamp (12) symmetrically arranged inside the reactor pressure cylinder (1). The sealing clamp (12) is slidably connected to the inner wall of the reactor pressure cylinder (1) and slidably connected to the guide plate (11) arranged inside the reactor pressure cylinder (1). A lifting frame (17) is slidably arranged inside the cylinder wall of the reactor pressure cylinder (1) and threadedly connected to the threaded rod (16). The lifting frame (17) and the sealing clamp (12) are connected by a connecting rod (18). A protrusion is provided on the side of the sealing clamp (12) near the bottom plate (3). The protrusion can be inserted into the inside of the bottom plate (3) to complete the driving of the transmission and control assembly.

7. The flow-guiding and erosion-resistant protective structure for the powder feed pipe of the fluidized bed reactor according to claim 2, characterized in that, The bottom plate (3) has an isosceles trapezoidal cross section, with the angle between its two inclined surfaces and the horizontal plane being 45° to 60°.

8. The flow-guiding and erosion-resistant protective structure for the powder feed pipe of the fluidized bed reactor according to claim 3, characterized in that, The surface of the guide plate (4) is provided with a wear-resistant ceramic coating.

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