A catalyst particle entrainment collection device for a gas-solid fluidized bed reactor

Abstract

This utility model discloses a catalyst particle collection device for a gas-solid fluidized bed reactor, relating to the field of gas-solid fluidized bed reactor technology. It includes a fluidized bed shell installed in a floor, with a cyclone separator shell connected to the inner top surface of the fluidized bed shell. This application solves the problem of current gas-solid fluidized bed reactors requiring multiple cyclone processors connected in series to avoid catalyst particle entrainment during exhaust gas collection by performing secondary treatment on the gas to be discharged after catalyst particle separation. Furthermore, this application uses blades in conjunction with a rotating ring to drive a guide bar to rotate on the inner wall, guiding and accelerating the catalyst particles separated by collision with the cyclone separator shell to fall and be collected. This solves the problem of low efficiency in catalyst particle collection devices that rely solely on gravity fall, thus improving the working efficiency of the catalyst particle collection device.

Description

Technical Field

[0001] This utility model relates to the field of gas-solid fluidized bed reactor technology, specifically to a catalyst particle collection device for a gas-solid fluidized bed reactor. Background Technology

[0002] Gas-solid fluidized beds are important equipment widely used in chemical, energy, and materials fields. They use a gaseous medium to fluidize solid particles, enabling heat transfer, mass transfer, and chemical reactions. Current gas-solid fluidized bed technology requires multiple cyclone processors to be connected in series to avoid the entrainment of catalyst particles in exhaust gas when collecting and treating catalyst particles entrained in exhaust gas. This requires a large number of cyclone processors, and the effect of a single cyclone processor in collecting catalyst particles is poor, resulting in poor practical performance of the catalyst particle collection device. Furthermore, the catalyst particle collection device can only collect catalyst particles by gravity (in the rotary separator shell, the catalyst particles are strongly thrown towards the inner wall due to inertia and centrifugal force. After colliding with the inner wall, the particles lose kinetic energy rapidly, lose their rotational motion, and slide down the wall under the action of gravity), which makes the efficiency of catalyst particle collection by gravity low, resulting in low working efficiency of the catalyst particle collection device. Utility Model Content

[0003] To address the above problems, this invention provides a catalyst particle entrainment collection device for a gas-solid fluidized bed reactor, which solves the aforementioned issues.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a catalyst particle collection device for a gas-solid fluidized bed reactor, comprising a fluidized bed shell, the fluidized bed shell being installed in a floor, a cyclone separator shell being connected to the inner top surface of the fluidized bed shell, a collection pipe being connected to one side of the cyclone separator shell, a particle discharge outlet being provided at the bottom of the cyclone separator shell, and a gas phase discharge pipe being connected inside the cyclone separator shell; The inner wall of the gas phase discharge pipe is connected to a mounting bracket, the top of the mounting bracket is connected to a main adsorption electrostatic ring, the top of the main adsorption electrostatic ring is connected to a connecting ring, the top of the connecting ring is connected to an auxiliary reinforcing electrostatic ring, the top of the auxiliary reinforcing electrostatic ring is connected to a constriction ring, and the inner wall of the gas phase discharge pipe is connected to a filter interceptor, which is positioned above the constriction ring.

[0005] Preferably, a rotating ring is rotatably connected to the outside of the gas phase discharge pipe, and several blades are connected to the outside of the rotating ring. The rotating ring is located at the collection pipe.

[0006] Preferably, a fixing frame is connected to the bottom of the rotating ring, and a guide strip is connected to one side of the fixing frame. The guide strip abuts against the inner wall of the cyclone separator housing.

[0007] Preferably, a plurality of heat exchange tubes are connected to the side of the fluidized bed shell, and the heat exchange tubes are distributed in a circumferential manner.

[0008] Preferably, the fluidized bed shell has a feed inlet connected to its side and two discharge gates connected to its side.

[0009] Preferably, an exhaust pipe is connected to the top of the fluidized bed shell, the cyclone separator shell corresponds to the exhaust pipe, and an air inlet pipe is connected to the bottom of the fluidized bed shell.

[0010] Preferably, a gas regulator is connected to the inner bottom of the fluidized bed shell, and the bottom of the gas regulator is connected to the air inlet pipe.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. This application uses a main adsorption electrostatic ring and an auxiliary reinforcing electrostatic ring in conjunction with a filter interceptor to perform secondary treatment on the gas to be discharged after the catalyst particles are separated. This achieves the effect of eliminating the need to connect multiple cyclone processors in series, and solves the problem that in the current gas-solid fluidized bed, multiple cyclone processors need to be connected in series to avoid the catalyst particles entrained in the exhaust gas. This is beneficial to improving the interception and collection effect of the catalyst particle collection device. 2. This application uses blades and a rotating ring to drive the guide bar to rotate on the inner wall of the fluidized bed shell, which guides and accelerates the catalyst particles separated from the cyclone separator shell to fall and collect them. This solves the problem that the catalyst particle collection device can only collect them by gravity, which has low efficiency. This is beneficial to improving the working efficiency of the catalyst particle collection device. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic cross-sectional view of the fluidized bed shell structure of this utility model; Figure 3 This is a schematic diagram of the cyclone separator shell structure of this utility model; Figure 4 This is a partial structural schematic diagram of the present invention; Figure 5 This is a cross-sectional view of the cyclone separator shell of this utility model; Figure 6 This is a schematic cross-sectional view of the gas phase discharge pipe of this utility model; Figure 7This is a partially exploded structural diagram of the present invention.

[0013] The diagram shows the following labels: 1. Fluidized bed shell; 2. Cyclone separator shell; 3. Collection pipe; 4. Particle discharge port; 5. Gas phase discharge pipe; 6. Mounting frame; 7. Main adsorption electrostatic ring; 8. Connecting ring; 9. Auxiliary reinforcing electrostatic ring; 10. Binding ring; 11. Filter interceptor; 12. Rotating ring; 13. Blade; 14. Fixing frame; 15. Guide bar; 16. Heat exchange tube; 17. Feed inlet; 18. Discharge gate; 19. Exhaust pipe; 20. Air inlet pipe; 21. Gas regulator. Detailed Implementation

[0014] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0015] Please see Figures 1 to 7 A catalyst particle collection device for a gas-solid fluidized bed reactor includes a fluidized bed shell 1, which is installed in a floor. The gas-solid fluidized bed is fixed to the floor and divided into upper and lower parts by the floor. When the fluidized bed is working, as the gas velocity gradually increases, when a certain critical value (minimum fluidization velocity) is reached, the force exerted by the gas on the solid particles (mainly buoyancy and friction) equals the weight of the particles. The solid particles begin to loosen and suspend in the airflow, thus entering the fluidized bed stage. If the gas velocity continues to increase, the movement of the particles becomes more intense, exhibiting liquid-like fluidity. They can flow out of the container opening like a liquid and also have the characteristics of liquid fluidity and horizontal surface. The above working principle is a known technology, and those skilled in the art can and should understand its specific functions and structure, so it will not be described in detail here. A cyclone separator shell 2 is connected to the inner top surface of the fluidized bed shell 1. The cyclone separator is a known technology. A blower is provided at the collection pipe 3. The equipment is used to transport the gas-solid mixture in the fluidized bed to the cyclone separator shell 2 through the collection pipe 3. The above structure is a conventional means that can be understood and implemented by those skilled in the art based on common sense, so it will not be described in detail here. In fact, it can be easily implemented by those skilled in the art without any additional mental effort. The collection pipe 3 is connected to one side of the cyclone separator shell 2, and the particle discharge port 4 is opened at the bottom of the cyclone separator shell 2. The gas phase discharge pipe 5 is connected inside the cyclone separator shell 2. The cyclone separator shell 2 ensures the normal flow of gas when the fluidized bed shell 1 is working. Specifically, the gas-solid mixture carrying solid particles enters the collection pipe 3 from the top of the fluidized bed, and then enters the cyclone separator shell 2 at a certain speed along the tangential direction. Since it enters along the tangential direction, the gas-solid mixture begins to rotate at high speed in the shell, just like water rotating in a vortex. This high-speed rotation makes the fluid obtain a large centrifugal force. Under the action of centrifugal force, the relatively large solid particles have greater inertia and will be thrown towards the cylinder wall of the cyclone separator shell 2. After colliding with the cylinder wall, the direction of the particles' movement changes and their speed also decreases. They gradually separate from the gas-solid mixture and begin to slide down along the cylinder wall and return to the fluidized bed shell 1 through the particle discharge port 4. Meanwhile, the gas continues to rotate and is discharged through the gas phase exhaust pipe 5. More specifically, because the rotating ring 12 is located at the collection pipe 3, the airflow will drive the blades 13 and the rotating ring 12 to rotate when the collection pipe 3 is inlet. At this time, the rotating ring 12 will drive the guide strip 15 to rotate on the inner wall of the cyclone separator housing 2. When the particles collide with the cylinder wall of the cyclone separator shell 2 and separate from the gas-solid mixture, and begin to slide down the cylinder wall, the guide bar 15 will also rotate on the inner wall of the cyclone separator shell 2 to guide the catalyst particles falling down the inner wall. The rotation of the guide bar 15 accelerates the falling speed of the catalyst particles, which solves the problem that the catalyst particle collection device can only collect them by gravity and has low efficiency. This is beneficial to improving the working efficiency of the catalyst particle collection device. A mounting bracket 6 is connected to the inner wall of the gas phase discharge pipe 5. A main adsorption electrostatic ring 7 is connected to the top of the mounting bracket 6. A connecting ring 8 is connected to the top of the main adsorption electrostatic ring 7. An auxiliary reinforcing electrostatic ring 9 is connected to the top of the connecting ring 8. After the catalyst particles in the gas-solid mixture are separated, the remaining gas is discharged through the gas phase discharge pipe 5. When passing through the gas phase discharge pipe 5, the gas will first pass through the main adsorption electrostatic ring 7. The gas passes through the main electrostatic adsorption ring 7, which is connected to a high-voltage power supply, forming a strong electrostatic field around it. During this process, the catalyst particles are polarized or directly charged, and then adsorbed onto the surface of the main electrostatic adsorption ring 7 under the action of electrostatic attraction, thereby intercepting the catalyst particles in the gas and reducing the concentration of catalyst particles in the gas. Next, the gas continues to flow to the auxiliary reinforcing electrostatic ring 9 region, where the auxiliary reinforcing electrostatic ring 9 further strengthens the electric field, performing secondary adsorption on these residual catalyst particles, further purifying the gas and reducing the emission of catalyst particles. After cyclone separation and dual adsorption by the main electrostatic adsorption ring 7 and the auxiliary reinforcing electrostatic ring 9, the catalyst particle content in the gas is significantly reduced. Finally, after being intercepted and filtered by the filter interceptor 11, the gas is discharged from the gas phase discharge pipe 5, either entering the subsequent process flow or being directly discharged. The top of the auxiliary reinforcing electrostatic ring 9 is connected to a constriction ring 10, which allows the gas phase to pass through the filter. A filter interceptor 11 is connected to the inner wall of the discharge pipe 5. The filter interceptor 11 is located above the constriction ring 10. The filter interceptor 11 then processes the gas. The filter interceptor 11 is a known technology and the current technology is very mature. Those skilled in the art can and should understand its specific function and structure, so it will not be described in detail here. The constriction ring 11 is mainly set up to guide the particles cleaned by the filter interceptor 11 to slide down to the particle discharge port 4 when the filter interceptor 11, the main adsorption electrostatic ring 7 and the auxiliary reinforcing electrostatic ring 9 are cleaned periodically.

[0016] A rotating ring 12 is rotatably connected to the outside of the gas phase discharge pipe 5. Several blades 13 are connected to the outside of the rotating ring 12. The rotating ring 12 is located at the collection pipe 3.

[0017] A fixed frame 14 is connected to the bottom of the rotating ring 12, and a guide bar 15 is connected to one side of the fixed frame 14. The guide bar 15 abuts against the inner wall of the cyclone separator housing 2.

[0018] Several heat exchange tubes 16 are connected to the side of the fluidized bed shell 1. The heat exchange tubes 16 are distributed in a circular pattern. One end of the heat exchange tube 16 flows into the heat exchange medium, and the other end flows out of the heat exchange medium. When the reaction in the gas-solid fluidized bed is an exothermic reaction, the cooling medium introduced into the heat exchange tube 17 will remove the excess heat generated by the reaction, so as to avoid the bed temperature being too high and affecting the reaction and the activity of the catalyst. If it is an endothermic reaction, the heating medium introduced into the heat exchange tube 16 can provide the heat required for the reaction, so as to ensure that the reaction proceeds within a suitable temperature range. It is important to note that the heat exchange tube 16 is connected to external equipment to facilitate the flow of the heat exchange medium. The specific external equipment and connection methods are well-known technologies and are conventional methods that can be understood and implemented by those skilled in the art based on common sense. They can be clearly understood without any mental effort, so they will not be elaborated on here.

[0019] The fluidized bed shell 1 has a feed inlet 17 connected to its side and two discharge gates 18 connected to its side. Materials are fed into the fluidized bed shell 1 through the feed inlet 17 and the processed materials are discharged by opening the discharge gates 18.

[0020] The top of the fluidized bed shell 1 is connected to an exhaust pipe 19, and the cyclone separator shell 2 corresponds to the exhaust pipe 19. The bottom of the fluidized bed shell 1 is connected to an air inlet pipe 20, which is connected to an external gas conveying device. A centrifugal fan is used for air intake. Specifically, the centrifugal fan rotates at high speed through its impeller, which gives the gas centrifugal force, thereby increasing the pressure and flow rate. This provides the gas with a certain pressure and flow rate to the gas-solid fluidized bed, which is also the power source to ensure that the gas flow rate meets the requirements of gas-solid fluidization. By adjusting the operating parameters of the gas conveying device, such as the speed of the centrifugal fan, the output pressure and flow rate of the gas can be changed, thereby adjusting the gas flow rate entering the gas-solid fluidized bed.

[0021] A gas regulator 21 is connected to the bottom of the fluidized bed shell 1. The bottom of the gas regulator 21 is connected to the air inlet pipe 20. Gas is transported to the gas regulator 21 through the air inlet pipe 20. The gas regulator 21 is used to regulate and distribute the incoming gas, so that the solid particles are fluidized more uniformly and stably, thereby providing stable and uniform air intake conditions for the gas-solid fluidized bed.

[0022] When using this utility model: First, when the fluidized bed is working, as the gas velocity gradually increases, when it reaches a certain critical value (minimum fluidization velocity), the force exerted by the gas on the solid particles (mainly buoyancy and friction) is equal to the weight of the particles. The solid particles begin to loosen and suspend in the airflow. At this point, the fluidized bed stage is entered. If the gas velocity continues to increase, the movement of the particles becomes more intense, exhibiting a fluidity similar to that of a liquid. It can flow out of the container opening like a liquid and also has the fluidity and horizontal surface characteristics of a liquid. Secondly, the cyclone separator shell 2 ensures the normal flow of gas during the operation of the fluidized bed shell 1. Specifically, the gas-solid mixture carrying solid particles enters the collection pipe 3 from the top of the fluidized bed, and then enters the cyclone separator shell 2 tangentially at a certain speed. Since it enters tangentially, the gas-solid mixture begins to rotate at high speed inside the shell, just like water rotating in a vortex. This high-speed rotation gives the fluid a large centrifugal force. Under the action of centrifugal force, the relatively large solid particles have greater inertia and are thrown towards the cylinder wall of the cyclone separator shell 2. After colliding with the cylinder wall, the direction of the particles changes, and their speed also decreases. They gradually separate from the gas-solid mixture and begin to slide down the cylinder wall and return to the fluidized bed shell 1 through the particle discharge port 4, while the gas continues to rotate and is discharged through the gas phase exhaust pipe 5. Then, because the rotating ring 12 is located at the collection pipe 3, the airflow will drive the blade 13 and the rotating ring 12 to rotate when the collection pipe 3 is inlet. At this time, the rotating ring 12 will drive the guide strip 15 to rotate on the inner wall of the cyclone separator shell 2. When the particles collide with the cylinder wall of the cyclone separator shell 2 and separate from the gas-solid mixture, and begin to slide down along the cylinder wall, the guide strip 15 will also rotate on the inner wall of the cyclone separator shell 2 to guide the catalyst particles falling up and down the inner wall. The rotation of the guide strip 15 will accelerate the falling speed of the catalyst particles, which solves the problem that the catalyst particle collection device can only collect them by gravity and has low collection efficiency. This is beneficial to improving the working efficiency of the catalyst particle collection device. Finally, after the catalyst particles in the gas-solid mixture are separated, the remaining gas is discharged through the gas phase discharge pipe 5. When passing through the gas phase discharge pipe 5, the gas first passes through the main electrostatic adsorption ring 7. The main electrostatic adsorption ring 7 is connected to a high-voltage power supply, forming a strong electrostatic field around it. During this process, the catalyst particles are polarized or directly charged, and then adsorbed onto the surface of the main electrostatic adsorption ring 7 under the action of electrostatic attraction, thereby intercepting the catalyst particles in the gas and reducing the concentration of catalyst particles in the gas. Next, the gas continues to flow to the auxiliary reinforcing electrostatic ring 9 region. The auxiliary reinforcing electrostatic ring 9 further strengthens the electric field, and performs secondary adsorption on these residual catalyst particles, further purifying the gas and reducing the emission of catalyst particles. After cyclone separation and dual adsorption by the main electrostatic adsorption ring 7 and the auxiliary reinforcing electrostatic ring 9, the content of catalyst particles in the gas is greatly reduced. Finally, after being intercepted and filtered by the filter interceptor 11, the gas is discharged from the gas phase discharge pipe 5 and enters the subsequent process flow or is directly discharged.

[0023] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A catalyst particle collection device for a gas-solid fluidized bed reactor, comprising a fluidized bed shell (1), wherein the fluidized bed shell (1) is installed in a floor, characterized in that: The inner top surface of the fluidized bed shell (1) is connected to a cyclone separator shell (2), a collection pipe (3) is connected to one side of the cyclone separator shell (2), a particle discharge port (4) is opened at the bottom of the cyclone separator shell (2), and a gas phase discharge pipe (5) is connected inside the cyclone separator shell (2). The inner wall of the gas phase discharge pipe (5) is connected to a mounting bracket (6), the top of the mounting bracket (6) is connected to a main adsorption electrostatic ring (7), the top of the main adsorption electrostatic ring (7) is connected to a connecting ring (8), the top of the connecting ring (8) is connected to an auxiliary reinforcing electrostatic ring (9), the top of the auxiliary reinforcing electrostatic ring (9) is connected to a constriction ring (10), the inner wall of the gas phase discharge pipe (5) is connected to a filter interceptor (11), and the filter interceptor (11) is located above the constriction ring (10).

2. The catalyst particle collection device for a gas-solid fluidized bed reactor according to claim 1, characterized in that: The gas phase discharge pipe (5) is rotatably connected to a rotating ring (12), and the rotating ring (12) is connected to a number of blades (13). The rotating ring (12) is located at the collection pipe (3).

3. The catalyst particle collection device for a gas-solid fluidized bed reactor according to claim 2, characterized in that: The bottom of the rotating ring (12) is connected to a fixed frame (14), and a guide strip (15) is connected to one side of the fixed frame (14). The guide strip (15) abuts against the inner wall of the cyclone separator housing (2).

4. The catalyst particle collection device for a gas-solid fluidized bed reactor according to claim 1, characterized in that: The fluidized bed shell (1) is connected to a number of heat exchange tubes (16) on its side, and the heat exchange tubes (16) are distributed in a circular pattern.

5. The catalyst particle collection device for a gas-solid fluidized bed reactor according to claim 4, characterized in that: The fluidized bed shell (1) has a feed inlet (17) connected to its side and two discharge gates (18) connected to its side.

6. The catalyst particle collection device for a gas-solid fluidized bed reactor according to claim 1, characterized in that: The top of the fluidized bed shell (1) is connected to an exhaust pipe (19), the cyclone separator shell (2) corresponds to the exhaust pipe (19), and the bottom of the fluidized bed shell (1) is connected to an air inlet pipe (20).

7. The catalyst particle collection device for a gas-solid fluidized bed reactor according to claim 6, characterized in that: A gas regulator (21) is connected to the bottom of the fluidized bed shell (1), and the bottom of the gas regulator (21) is connected to the air inlet pipe (20).

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