Air chamber structure of a spouted fluidized bed

Abstract

The utility model provides a kind of wind chamber structure of spouted fluidized bed, comprising: wind chamber body, bottom air inlet, top air outlet, air distribution plate is provided with two layers, lower layer main air distribution plate and upper layer auxiliary air distribution plate are left empty along vertical direction, as buffer cavity, the aperture of main air distribution plate upper air hole is greater than the aperture of auxiliary air distribution plate upper air hole, auxiliary air distribution plate upper air hole is more dense compared with main air distribution plate upper air hole distribution, main air distribution plate and auxiliary air distribution plate are vibratable by vibration motor driven and installed in chamber as a whole;Air inlet component is used to the bottom air inlet of wind chamber body;Gas-solid separation component is used to receive the top air outlet of wind chamber body and carry out gas-solid separation;Material backflow component is used to receive the solid material separated by gas-solid separation component, and send into wind chamber body chamber by material backflow port.The utility model can improve the production status of air distribution plate easy to block, reduce the adverse effects caused by air distribution plate blockage on the running performance and process effect of spouted fluidized bed, and protect the normal operation of equipment.

Description

Technical Field

[0001] This utility model relates to the field of jet fluidized bed technology, and more specifically to a wind chamber structure for a jet fluidized bed. Background Technology

[0002] Fluidized bed reactors play a crucial role in numerous fields, including chemical engineering, energy, food processing, and environmental protection. From the drying and synthesis of chemical raw materials to the combustion and utilization of biomass energy, and the treatment and purification of wastewater and waste gas, fluidized bed reactors demonstrate unique advantages. The air chamber structure, as a core component of the fluidized bed reactor, directly relates to the input and distribution of gas, thus affecting the overall operating performance and process efficiency of the equipment.

[0003] The structure of the air chamber of the jet fluidized bed: The air enters the air chamber through the inlet, and after processes such as pressure stabilization and flow guidance, it enters the jet fluidized bed layer through the air distribution plate, so that the solid particles in the bed are fluidized and formed into a jet state, realizing heat transfer and mass transfer between gas and solid, and drying the material.

[0004] When the material being processed contains large particles, impurities, or sticky substances, the air distribution plate is prone to blockage, which leads to uneven gas flow and unstable particle fluidization in the jet fluidized bed. This can result in insufficient or excessive fluidization in local areas, severely affecting the normal operation of the equipment. Utility Model Content

[0005] To address the aforementioned technical problems, this utility model proposes a wind chamber structure for a jet fluidized bed, which improves the current production situation where the air distribution plate is prone to clogging, reduces the adverse effects of air distribution plate clogging on the operating performance and process effect of the jet fluidized bed, and ensures the normal operation of the equipment.

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

[0007] A wind chamber structure for a jet-fluidized bed includes:

[0008] The air chamber body has air intake at the bottom and air outlet at the top. Above the air distribution plate inside the chamber is a jet fluidized bed. Corresponding to the jet fluidized bed, there is a material outlet on the upper side wall and a material return port on the lower side wall. The air distribution plate has two layers, including a lower main air distribution plate and an upper secondary air distribution plate. There is a vertical gap between the main air distribution plate and the secondary air distribution plate as a buffer chamber. The air outlet diameter of the main air distribution plate is larger than that of the secondary air distribution plate. The air outlet diameter of the secondary air distribution plate is more densely distributed than that of the main air distribution plate. The main air distribution plate and the secondary air distribution plate as a whole are driven to vibrate by a vibration motor installed inside the chamber. A pressure sensor is installed at the bottom of the vibration motor to detect the indoor air pressure.

[0009] Air intake assembly, used to intake air to the bottom of the air chamber body;

[0010] A gas-solid separation assembly is used to receive the air outlet from the top of the air chamber body and perform gas-solid separation;

[0011] The material return assembly is used to receive the solid material separated by the gas-solid separation assembly and send it into the air chamber body through the material return port.

[0012] The structural features of this utility model also lie in:

[0013] The outer edges of the main air distribution plate and the secondary air distribution plate are connected by a ring-shaped vertical plate. The whole unit is vertically slidably set in a ring groove recessed in the inner wall of the air chamber body by a slider set on the outer side of the ring-shaped vertical plate. It can vibrate within the height range limited by the groove by a vibration motor.

[0014] The gap between the upper edge of the auxiliary air distribution plate and the inner wall of the air chamber body is sealed by a ring of dead zone baffles. The upper end of the dead zone baffles is always in contact with the gasket on the inner wall of the air chamber body, and the lower end is connected to the upper edge of the auxiliary air distribution plate. The side of the gasket that contacts the dead zone baffles is smooth.

[0015] The drive end of the vibration motor is connected to the bottom of the main air distribution plate.

[0016] The air intake assembly includes a blower, an air intake pipe, and a heating device. External air is introduced into the bottom of the air chamber body through the blower and the air intake pipe. The air intake pipe is equipped with a heating device for heating the air inside the pipe.

[0017] The gas-solid separation assembly includes a separation fan and a separation device. The separation device has a cavity structure, with an upper cylindrical feeding chamber and a lower frustum-shaped separation chamber. The feeding chamber and the separation chamber are coaxial. The separation chamber has a large end facing upwards and gradually narrows downwards to form a small opening as the discharge port. A top air inlet is provided in the center of the top of the feeding chamber, and a side air inlet is provided on the side wall. The air outlet at the top of the air chamber body is sent into the feeding chamber through the air outlet pipe and the side air inlet of the feeding chamber. The top air inlet of the feeding chamber is connected to the air outlet of the separation fan through the fan air outlet pipe, and the air inlet of the separation fan is connected to the fan air inlet pipe.

[0018] The material return assembly includes an outer housing and a conveyor belt built into the housing, and a motor for driving the conveyor belt. The top of the housing is open, and an outlet is opened on the upper part of the side wall. The separation device of the gas-solid separation assembly extends downward from the top of the housing into the housing. The discharge port extends above the bottom of the housing and maintains a gap with the bottom of the housing. The conveyor belt is inclined, with the lower end extending to the bottom of the housing and located in the area of ​​the discharge port, and the higher end connecting to the outlet. The outlet is connected to the material return port of the air chamber body through a return pipe.

[0019] Compared with existing technologies, the beneficial effects of this utility model are reflected in:

[0020] This utility model designs the air distribution plate as a double-layer structure, with larger air holes on the main air distribution plate and denser air holes on the secondary air distribution plate. It also utilizes the space between the main and secondary air distribution plates as a buffer chamber. In addition, a vibration motor is set to drive the main and secondary air distribution plates to vibrate as a whole, so that the airflow is evenly and smoothly distributed, which can effectively prevent blockage.

[0021] In addition, the installation of dead zone baffles can closely protect the surrounding airflow, further unify the airflow, reduce local overheating, and comprehensively reduce the risk of loss to subsequent equipment due to uneven airflow and material blockage.

[0022] Furthermore, by setting up gas-solid separation components and material return components, the materials carried by the air coming out of the top of the air chamber can be collected in a centralized manner and then sent back to the air chamber, reducing material waste and lowering production costs. Attached Figure Description

[0023] Figure 1 This is a structural schematic diagram of the present invention.

[0024] Figure 2 This is a schematic diagram of the internal air distribution plate of the air chamber.

[0025] Figure 3 yes Figure 2 A schematic diagram of the local structure at point A in the middle;

[0026] Figure 4 This is a structural diagram of the air intake assembly;

[0027] Figure 5 This is a schematic diagram of the gas-solid separation component and the material return component.

[0028] In the picture:

[0029] 1. Air chamber body; 11. Material outlet; 12. Material return port; 13. Slide chute; 14. Gasket; 15. Main air distribution plate; 16. Secondary air distribution plate; 17. Buffer chamber; 18. Dead zone baffle; 19. Annular vertical plate; 110. Slider; 111. Vibration motor; 112. Buffer isolation pad

[0030] 2. Air inlet assembly; 21. Blower; 22. Air inlet duct; 23. Fixing block; 24. Heating wire;

[0031] 3. Gas-solid separation assembly; 31. Air outlet duct; 32. Separation fan; 33. Fan air outlet duct; 34. Fan air inlet duct; 35. Separation device; 36. Feed chamber; 37. Separation chamber;

[0032] 4 Material return assembly; 41 External housing; 42 Outlet; 43 Return pipe; 44 Conveyor belt; 45 Motor. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below in conjunction with the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0034] Please refer to Figures 1 to 5 The air chamber structure of the jet-fluidized bed in this embodiment includes:

[0035] The air chamber body 1 has air inlet at the bottom and air outlet at the top. Above the air distribution plate in the chamber is a jet fluidized bed. Corresponding to the jet fluidized bed, a material outlet 4211 is provided on the upper part of the side wall and a material return port 12 is provided on the lower part of the side wall. The air distribution plate has two layers, including a lower main air distribution plate 15 and an upper secondary air distribution plate 16. A vertical gap is left between the main air distribution plate 15 and the secondary air distribution plate 16 as a buffer chamber 17. The diameter of the air holes on the main air distribution plate 15 is larger than that on the secondary air distribution plate 16. The air holes on the secondary air distribution plate 16 are more densely distributed than those on the main air distribution plate 15. The main air distribution plate 15 and the secondary air distribution plate 16 as a whole are driven to vibrate by a vibration motor 45111 installed in the chamber. A pressure sensor is provided at the bottom of the vibration motor 45111 to detect the indoor air pressure.

[0036] Air intake assembly 2 is used to intake air to the bottom of the air chamber body 1;

[0037] The gas-solid separation component 3 is used to receive the air outlet from the top of the air chamber body 1 and perform gas-solid separation;

[0038] The material return assembly 4 is used to receive the solid material separated by the gas-solid separation assembly 3 and send it into the air chamber body 1 through the material return port 12.

[0039] In specific implementation, the corresponding structural configuration of the air chamber structure of the jet fluidized bed in this embodiment also includes:

[0040] The main air distribution plate 15 is made of high-strength, wear-resistant metal material to withstand the impact of airflow from the air chamber and the wear of materials. Its air holes are relatively large. The secondary air distribution plate 16 is made of thin metal material with good thermal conductivity and fine openings.

[0041] The outer edges of the main air distribution plate 15 and the secondary air distribution plate 16 are connected by a ring-shaped vertical plate 19. The whole is vertically slidably set in a ring groove 13 recessed in the inner wall of the air chamber body 1 through the slider 110 provided on the outer side of the ring-shaped vertical plate 19. It can vibrate within the height range limited by the groove 13 and is driven by the vibration motor 45111.

[0042] The slider 110 is made of high-temperature resistant rubber material, which provides a certain buffer for the horizontal vibration of the air distribution plate.

[0043] The gap between the upper outer edge of the auxiliary air distribution plate 16 and the inner wall of the air chamber body 1 is sealed by a ring of dead zone baffles 18. The upper end of the dead zone baffles 18 is always in contact with the gaskets 14 on the inner wall of the air chamber body 1, and the lower end is connected to the upper outer edge of the auxiliary air distribution plate 16. The side of the gaskets 14 that contacts the dead zone baffles 18 is smooth. The dead zone baffles 18 are axially continuous frustum-shaped shell structures with the large end facing upward. When they move synchronously with the vibration of the auxiliary air distribution plate 16, they always maintain contact with the gaskets 14, thus always sealing the gap between the auxiliary air distribution plate 16 and the air chamber body 1. This prevents uneven airflow around the gap, reduces local overheating and wear, and reduces the risk of wear and blockage to subsequent equipment.

[0044] The dead zone baffle 18 and the upper outer edge of the secondary air distribution plate 16 are sealed by a high-temperature resistant rubber gasket. The high-temperature resistant rubber gasket can also provide a certain buffer for the vertical vibration of the air distribution plate.

[0045] The drive end of the vibration motor 45111 is connected to the bottom of the main air distribution plate 15. The mounting end of the vibration motor 45111 is installed on the inner wall of the air chamber body 1, and a buffer isolation pad 112 is provided between the vibration motor 45111 and the inner wall of the air chamber body 1 to reduce the impact on the air chamber body 1 during operation.

[0046] When the air pressure in the area where the air pressure sensor is located changes, the resistivity of the air pressure sensor will change. The air pressure sensor monitors the indoor air pressure in real time. When the pressure exceeds the set range, the vibration motor 45111 is activated, driving the main air distribution plate 15 and the auxiliary air distribution plate 16 to vibrate slightly simultaneously. This vibration helps to clear material from the air distribution plates, preventing blockages. If the blockage on the air distribution plates is a sticky substance or large particles, it will cause airflow to concentrate at the bottom of the air distribution plates, increasing the surrounding air pressure and generating greater flow force. This, combined with the vibration of the air distribution plates, helps to clear the blockage.

[0047] The air intake assembly 2 includes a blower 21, an air intake duct 22, and a heating device. External air is introduced into the bottom of the air chamber body 1 through the blower 21 and the air intake duct 22. The air intake duct 22 is equipped with a heating device for heating the air inside the duct. The heating device consists of multiple heating wires 24 evenly distributed and spaced around the central axis of the air intake duct 22. These heating wires 24 are housed within a fixing block 23, which is fitted onto the air intake duct 22. The heating device preheats the air entering the air chamber body 1 to meet the gas temperature requirements of the jet fluidized bed process.

[0048] The gas-solid separation assembly 3 includes a separation fan 32 and a separation device 35. The separation device 35 has a cavity structure, with an upper cylindrical feeding chamber 36 and a lower frustum-shaped separation chamber 37 inside. The feeding chamber 36 and the separation chamber 37 are coaxial. The separation chamber 37 has a large end facing upward and gradually narrows downward to form a small opening as the discharge port. The top of the feeding chamber 36 is provided with a top air outlet in the center, and the side wall is provided with a side air outlet. The air outlet at the top of the air chamber body 1 is sent into the feeding chamber 36 through the air outlet pipe 31 and the side air outlet of the feeding chamber 36. The top air outlet of the feeding chamber 36 is connected to the air outlet of the separation fan 32 through the fan air outlet pipe 33. The air inlet of the separation fan 32 is connected to the fan air inlet pipe 34.

[0049] The separator fan 32 is a blower that continuously blows fresh air into the separator 35. The blown air causes the internal pressure of the device to be greater than the external pressure. Part of the blown air is used to exhaust the air inside the device under the action of the internal and external pressure difference, while part of it is circulated within the system.

[0050] The outlet pipe 31 supplies gas carrying material into the feed chamber 36 along the tangential direction of the feed chamber 36. Alternatively, the outlet pipe 31 supplies gas carrying material into the feed chamber 36 in a direction parallel to the tangential direction of the feed chamber 36.

[0051] The air outlet duct 31 is composed of multiple detachable pipe sections, which facilitates disassembly and assembly, as well as pipe maintenance and cleaning.

[0052] The material return assembly 4 includes an outer box 41 and a conveyor belt 44 built into the box, and a motor 45 for driving the conveyor belt 44. The top of the box is open and the upper part of the side wall has an outlet 42. The separation device 35 of the gas-solid separation assembly 3 extends downward from the top of the box into the box. The discharge port is suspended above the bottom of the box and maintains a gap with the bottom of the box. The conveyor belt 44 is inclined, with the lower end extending to the bottom of the box and located in the area of ​​the discharge port, and the higher end connecting to the outlet 42. The outlet 42 is connected to the material return port 12 of the air chamber body 1 through the return pipe 43.

[0053] Working principle:

[0054] The air chamber body 1 is used to provide space for the processing and transmission of gas and materials. External air is sent into the air chamber body 1 through the air inlet assembly 2. After being initially diverted through the air holes of the main air distribution plate 15, it enters the buffer chamber 17 between the two air distribution plates to further balance the pressure and flow rate. Then, it is blown out evenly through the air holes of the secondary air distribution plate 16, so that the airflow can act on the material more gently.

[0055] Air enters the fluidized bed through the air distribution plate and acts on the material. A portion of the material is discharged from the material outlet 4211 of the air chamber body 1, while the remaining material follows the hot air upward. The gas carrying the material enters the separation device 35, where the material falls into the separation chamber 37 and then into the outer box 41 of the material recovery component for temporary storage through the outlet of the separation chamber 37. The separation fan 32 discharges the excess air.

[0056] Materials are piled up in the outer casing 41 and can be transported by conveyor belt 44, returning to the main air chamber 1 through the material return port 12.

[0057] Although embodiments of the present invention have been shown and described, those skilled in the art will understand 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 claims and their equivalents.

Claims

1. A wind chamber structure for a jet-fluidized bed, characterized in that: include: The air chamber body has air intake at the bottom and air outlet at the top. Above the air distribution plate inside the chamber is a jet fluidized bed. Corresponding to the jet fluidized bed, a material outlet is provided on the upper part of the side wall and a material return port is provided on the lower part of the side wall. The air distribution panel has two layers, including a lower main air distribution panel and an upper secondary air distribution panel. A vertical gap is left between the main air distribution panel and the secondary air distribution panel as a buffer cavity. The air outlet diameter on the main air distribution panel is larger than that on the secondary air distribution panel. The air outlet diameter on the secondary air distribution panel is more densely distributed than that on the main air distribution panel. The main air distribution panel and the secondary air distribution panel as a whole can vibrate by a vibration motor installed indoors. A pressure sensor is installed at the bottom of the vibration motor to detect the indoor air pressure. Air intake assembly, used to intake air to the bottom of the air chamber body; A gas-solid separation assembly is used to receive the air outlet from the top of the air chamber body and perform gas-solid separation; The material return assembly is used to receive the solid material separated by the gas-solid separation assembly and send it into the air chamber body through the material return port.

2. The air chamber structure of the jet-fluidized bed according to claim 1, characterized in that: the main... The outer edges of the air distribution plate and the auxiliary air distribution plate are connected by a ring-shaped vertical plate. The whole unit is vertically slidably set in a ring groove recessed in the inner wall of the air chamber body by a slider set on the outer side of the ring-shaped vertical plate. It can vibrate within the height range limited by the groove by a vibration motor.

3. The air chamber structure of the jet-fluidized bed according to claim 1 or 2, characterized in that: The gap between the upper edge of the auxiliary air distribution plate and the inner wall of the air chamber body is sealed by a ring of dead zone baffles. The upper end of the dead zone baffles is always in contact with the gasket on the inner wall of the air chamber body, and the lower end is connected to the upper edge of the auxiliary air distribution plate. The side of the gasket that contacts the dead zone baffles is smooth.

4. The air chamber structure of the jet-fluidized bed according to claim 1 or 2, characterized in that: The drive end of the vibration motor is connected to the bottom of the main air distribution plate.

5. The air chamber structure of the jet-fluidized bed according to claim 1, characterized in that: The air intake assembly includes a blower, an air intake pipe, and a heating device. External air is introduced into the bottom of the air chamber body through the blower and the air intake pipe. The air intake pipe is equipped with a heating device for heating the air inside the pipe.

6. The air chamber structure of the jet-fluidized bed according to claim 1, characterized in that: The gas-solid separation assembly includes a separation fan and a separation device. The separation device has a cavity structure, with an upper cylindrical feeding chamber and a lower frustum-shaped separation chamber. The feeding chamber and the separation chamber are coaxial. The separation chamber has a large end facing upwards and gradually narrows downwards to form a small opening as the discharge port. A top air inlet is provided in the center of the top of the feeding chamber, and a side air inlet is provided on the side wall. The air outlet at the top of the air chamber body is sent into the feeding chamber through the air outlet pipe and the side air inlet of the feeding chamber. The top air inlet of the feeding chamber is connected to the air outlet of the separation fan through the fan air outlet pipe, and the air inlet of the separation fan is connected to the fan air inlet pipe.

7. The air chamber structure of the jet-fluidized bed according to claim 6, characterized in that: The material return assembly includes an outer housing and a conveyor belt built into the housing, and a motor for driving the conveyor belt. The top of the housing is open, and an outlet is opened on the upper part of the side wall. The separation device of the gas-solid separation assembly extends downward from the top of the housing into the housing. The discharge port extends above the bottom of the housing and maintains a gap with the bottom of the housing. The conveyor belt is inclined, with the lower end extending to the bottom of the housing and located in the area of ​​the discharge port, and the higher end connecting to the outlet. The outlet is connected to the material return port of the air chamber body through a return pipe.

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