Biomass fluidized bed device

Abstract

The utility model relates to the technical field of fluidized beds, and discloses a biomass fluidized bed device which comprises a bin body and a supporting frame, the bin body, a spiral conveyor, an air pump and a first motor are fixedly installed on the supporting frame, a gathering box is arranged in the center of the interior of the bin body, and the output end of the spiral conveyor extends into the bin body and is communicated and assembled with the gathering box. A second motor is fixedly mounted at the top of the bin body, a transmission shaft is fixedly mounted at the output end of the second motor, and the lower end of the transmission shaft penetrates through the gathering box and is fixedly provided with a uniform distribution net; an outer air distribution disc and an inner air distribution disc are arranged on the lower side in the bin body, the outer air distribution disc is assembled with the air pump in a communicating mode, one end of the inner air distribution disc is assembled with the outer air distribution disc in a communicating mode, and the other end of the inner air distribution disc is fixedly assembled with the output end of the first motor. According to the utility model, materials can be gathered and stirred and fall down on the uniform distribution net in a concentrated manner to be scattered, so that the fluidization forming speed is increased; biomass particles deposited at the bottom of the bin body can be reduced, and the material utilization rate is increased.

Description

Technical Field

[0001] This utility model relates to the field of fluidized bed technology, specifically to a biomass fluidized bed device. Background Technology

[0002] A biomass fluidized bed is a highly efficient reaction device that uses fluidization technology to process biomass (such as agricultural and forestry waste, energy crops, etc.). Its core principle is to use gas to keep the solid particles of biomass in a suspended state, and the fluidization formed can enhance heat transfer, mass transfer and reaction processes.

[0003] For example, in the operation of biomass waste incineration, the biomass material needs to be dried and crushed first. The resulting biomass particles are fed into the biomass fluidized bed by a screw conveyor. The gas introduced from bottom to top through the air distribution plate inside the biomass fluidized bed can make the biomass particles fluidized. After being transported to the combustion furnace, it can accelerate the combustion rate and the completeness of combustion.

[0004] However, biomass material fed into the screw conveyor from a single input point is relatively concentrated, which is not conducive to the rapid formation of fluidization. Furthermore, biomass particles tend to settle below the air distribution plate and do not participate in the formation of fluidization, which leads to a decrease in material utilization. In addition, it is necessary to regularly clean and recycle the deposited biomass material from the slag discharge pipe at the bottom of the silo, which increases the workload.

[0005] Therefore, in order to solve the above problems, a biomass fluidized bed device is proposed. Utility Model Content

[0006] The purpose of this invention is to provide a biomass fluidized bed device that can evenly distribute the centrally fed biomass materials, which is conducive to fluidization and can reduce the deposition of biomass particles, improve material utilization, and thus solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a biomass fluidized bed device, comprising a chamber and a support frame, wherein the chamber, a screw conveyor, an air pump, and a first motor are fixedly installed on the support frame; a collection box is provided at the center of the interior of the chamber; the output end of the screw conveyor extends into the chamber and is connected to the collection box; a second motor is fixedly installed on the top of the chamber; a drive shaft is fixedly installed on the output end of the second motor; the lower end of the drive shaft passes through the collection box and is fixedly installed with a uniformly distributed net; an outer air distribution plate and an inner air distribution plate are provided on the lower interior side of the chamber; the inner air distribution plate is located inside the outer air distribution plate; the outer air distribution plate is connected to the air pump; one end of the inner air distribution plate is connected to the outer air distribution plate; and the other end of the inner air distribution plate is fixedly installed to the output end of the first motor.

[0008] Specifically, the external air distribution coil includes a main pipe, a first C-shaped pipe, and a first nozzle. The main pipe is installed through the lower side wall of the chamber. The end of the main pipe located outside the chamber is connected to the air pump. At least one pair of first C-shaped pipes are fixedly installed on both sides of the main pipe. One end of the first C-shaped pipe is connected to the main pipe and the other end is closed. A gap is left between the closed ends of each pair of first C-shaped pipes. The first nozzles are uniformly connected and installed on the upper side of the first C-shaped pipe.

[0009] Specifically, the internal air distribution coil includes a rotary joint, a second C-shaped tube, and a secondary pipe. One end of the secondary pipe is connected to the main pipe via the rotary joint, and the other end of the secondary pipe is fixedly connected to the output end of the first motor via a transmission rod. The transmission rod is located inside the notch and is rotatably connected to the side wall of the chamber. At least one pair of second C-shaped tubes are fixedly installed on both sides of the secondary pipe. Both ends of the second C-shaped tubes are connected to the secondary pipe, and a second nozzle is uniformly connected and installed on the upper side of the second C-shaped tube.

[0010] Furthermore, the number of screw conveyors is 2 to 4, arranged in a circular pattern.

[0011] Furthermore, several pairs of stirring rods are fixedly installed on the circumferential side of the drive shaft. The stirring rods are located inside the collecting box. The top center of the collecting box is rotatably assembled with the drive shaft. The bottom of the collecting box gradually narrows and is provided with a discharge port.

[0012] Furthermore, the uniformly distributed mesh is a disc-shaped structure with an upward convexity at the center.

[0013] Furthermore, the bottom of the chamber is a hemispherical shell.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] By adding a collection box in conjunction with a rotatable uniform distribution net, materials input from multiple screw conveyors can be collected and concentrated downwards onto the uniform distribution net for dispersion, which facilitates the contact between biomass pellets and gas, thereby increasing the rate of fluidization. The stirring rod added inside the collection box can stir the various biomass materials collected, improving the uniformity of material mixing.

[0016] The external air distribution plate and the flip-up internal air distribution plate work together to achieve upward and uniform air distribution, which can also reduce the biomass particles deposited at the bottom of the silo, improve material utilization, and reduce the workload of slag removal. Attached Figure Description

[0017] Figure 1 This is a schematic front view of the structure of this utility model;

[0018] Figure 2 This is a schematic cross-sectional view of the internal structure of the container of this utility model;

[0019] Figure 3 This is a top view showing the structure of the outer and inner air distribution coils of this utility model;

[0020] Figure 4 This is a partial sectional view of the structure of the collection box of this utility model.

[0021] In the diagram: 1. Bin body, 2. Second motor, 3. Discharge pipe, 4. Drive shaft, 5. Converging box, 6. Uniform distribution net, 7. First motor, 8. External air distribution coil, 81. Main pipe, 82. First C-shaped pipe, 83. First nozzle, 9. Internal air distribution coil, 91. Rotary joint, 92. Second C-shaped pipe, 93. Secondary pipe, 94. Second nozzle, 10. Solenoid valve, 11. Hemispherical shell, 12. Support frame, 13. Air pump, 14. Stirring rod, 15. Screw conveyor. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figure 1 and Figure 2 This utility model provides a technical solution: a biomass fluidized bed device, including a silo body 1 and a support frame 12. The main body of the silo body 1 is a cylindrical container. The top of the side wall of the silo body 1 is connected to a discharge pipe 3, and the bottom is connected to a solenoid valve 10 through a slag discharge pipe. The above is the existing structure and will not be described in detail here. The silo body 1, a screw conveyor 15, an air pump 13 and a first motor 7 are fixedly installed on the support frame 12. The support frame 12 is a frame welded from angle steel, which provides a support foundation and installation position for each component.

[0024] A collection box 5 is located at the center of the interior of the silo 1. The main body of the collection box 5 is a cylindrical container. The output end of the screw conveyor 15 extends into the silo 1 and is connected to the collection box 5. The screw conveyor 15 is an existing component, and the storage box of the screw conveyor 15 is a sealable box. For example, the storage box has a lid that can be opened and closed by fasteners and hinges. The rotating conveying of the blades in the screw conveyor 15 has the function of preventing backflow, avoiding excessive pressure inside the silo 1 that would cause the stored biomass material to return to the storage box. The collection box 5 is used to collect the biomass material output by the screw conveyor 15 and discharge it downwards.

[0025] The top of the silo 1 is fixedly installed with a second motor 2 via a support cylinder. The output end of the second motor 2 is fixedly installed with a drive shaft 4 via a coupling. The lower end of the drive shaft 4 passes through the collection box 5 and is fixedly installed with a uniformly distributed net 6. The uniformly distributed net 6 is made of metal mesh. When the second motor 2 is working, it can rotate the uniformly distributed net 6 via the drive shaft 4 to disperse the biomass material discharged downward from the collection box 5 and distribute it evenly in a plane.

[0026] An outer air distribution plate 8 and an inner air distribution plate 9 are arranged on the lower side of the interior of the chamber 1. The inner air distribution plate 9 is located inside the outer air distribution plate 8. The outer air distribution plate 8 is connected and assembled with the air pump 13. One end of the inner air distribution plate 9 is connected and assembled with the outer air distribution plate 8, and the other end of the inner air distribution plate 9 is fixedly assembled with the output end of the first motor 7. The first motor 7 is an existing geared motor with an encoder, used to rotate the inner air distribution plate 9, so that the inner air distribution plate 9 has two working states, namely facing up and facing down. The function of the air pump 13 is to pump air into the chamber. High-pressure gas is introduced into the outer air distribution plate 8 and the inner air distribution plate 9. When the inner air distribution plate 9 is facing upward, the outer air distribution plate 8 and the inner air distribution plate 9 can output evenly distributed gas upward, so that the dispersed biomass material is fluidized and finally discharged from the discharge pipe 3 for use in the next process. When the inner air distribution plate 9 is facing downward, the biomass particles deposited at the bottom can be disturbed. In combination with the outer air distribution plate 8 which is still outputting gas upward, the deposited biomass particles can be blown up again for utilization, improving the full utilization of materials.

[0027] For details, please refer to Figure 3 The external ventilation coil 8 includes a main pipe 81, a first C-shaped pipe 82, and a first nozzle 83. The main pipe 81 is installed through the lower side wall of the chamber 1, and the main pipe 81 is sealed to the side wall of the chamber 1 by welding. The end of the main pipe 81 located outside the chamber 1 is connected to the air pump 13. At least one pair of first C-shaped pipes 82 are fixedly installed on both sides of the main pipe 81. One end of the first C-shaped pipe 82 is connected to the main pipe 81 by welding, and the other end is closed. There is a gap between the closed ends of each pair of first C-shaped pipes 82. The first nozzle 83 is evenly connected and installed on the upper side of the first C-shaped pipe 82.

[0028] Multiple pairs of first C-shaped tubes 82 can be matched and set according to the internal space of the chamber 1, and each pair of first C-shaped tubes 82 has a different diameter, so that multiple pairs of first C-shaped tubes 82 can be coaxially distributed on the same plane. The high-pressure gas input by the air pump 13 to the main pipe 81 can be distributed in the first C-shaped tubes 82 and finally discharged upward from the first nozzle 83.

[0029] The inner air distribution coil 9 includes a rotary joint 91, a second C-shaped tube 92, and a secondary pipe 93. One end of the secondary pipe 93 is connected to the main pipe 81 via the rotary joint 91. The rotary joint 91 allows the secondary pipe 93 to rotate circumferentially relative to the main pipe 81 and remain connected. The other end of the secondary pipe 93 is fixedly connected to the output end of the first motor 7 via a transmission rod. The transmission rod is located inside the notch and is rotatably connected to the side wall of the chamber 1 via a rotary sealing ring. At least one pair of second C-shaped tubes 92 are fixedly installed on both sides of the secondary pipe 93. Both ends of the second C-shaped tubes 92 are connected to the secondary pipe 93. Second nozzles 94 are uniformly connected and installed on the upper side of the second C-shaped tubes 92.

[0030] Multiple pairs of second C-shaped tubes 92 can be matched and installed according to the internal space of the chamber 1. The second C-shaped tubes 92 are located inside the innermost first C-shaped tube 82. Each pair of second C-shaped tubes 92 has a different diameter, so that multiple pairs of second C-shaped tubes 92 can be coaxially distributed on the same plane. The high-pressure gas in the main pipe 81 can also enter the secondary pipe 93 through the rotary joint 91, and then be evenly distributed in each second C-shaped tube 92, and finally output from the second nozzle 94. The first motor 7 can flip the secondary pipe 93, the second C-shaped tubes 92 and the second nozzle 94 through the transmission rod, changing the output direction of the second nozzle 94.

[0031] In addition, depending on the type of biomass material to be input, the number of screw conveyors 15 is 2 to 4 in a circular arrangement, which can meet the working conditions of inputting multiple materials at the same time.

[0032] Please see Figure 4 Several pairs of stirring rods 14 are fixedly installed on the circumference of the drive shaft 4. The stirring rods 14 are located inside the collection box 5. The top center of the collection box 5 is rotatably assembled with the drive shaft 4 through a sealed bearing. When the stirring rods 14 rotate with the drive shaft 4, they can stir the biomass material entering the collection box 5. The bottom of the collection box 5 gradually narrows and is provided with a discharge port, which can slow down the discharge rate of the biomass material and improve the stirring effect.

[0033] The uniformly distributed net 6 is a disc-shaped structure with an upward convex center. This shape of the uniformly distributed net 6 is more conducive to dispersing the biomass material discharged downward from the collection box 5 to the surrounding area.

[0034] The bottom of the chamber 1 is a hemispherical shell 11. When the second nozzle 94 outputs gas downwards, the shape of the hemispherical shell 11 at the bottom of the chamber 1 makes it easier for the biomass particles deposited at the bottom to turn upwards along the bottom wall and then rise with the gas output upwards by the first nozzle 83 for reuse.

[0035] The working principle of this embodiment:

[0036] The screw conveyor 15, air pump 13, first motor 7, second motor 2 and other electrical components are all electrically connected to the external control cabinet and are controlled by the controller.

[0037] The discharge pipe 3 is connected to the external combustion furnace. In the initial state, the first nozzle 83 and the second nozzle 94 are both set upwards. Various biomass materials are sealed and stored in the storage box of the screw conveyor 15. During operation, the biomass materials are uniformly conveyed to the collection box 5 for collection. At the same time, the second motor 2 rotates (either forward or reverse) the stirring rod 14 and the uniform distribution net 6 via the drive shaft 4. The stirring rod 14 can stir the biomass materials in the collection box 5, and the biomass materials discharged downwards are dispersed by the uniform distribution net 6.

[0038] In addition, the air pump 13 inputs high-pressure gas into the outer air distribution plate 8 and the inner air distribution plate 9, and finally delivers it upwards evenly from the first nozzle 83 and the second nozzle 94, so that the broken biomass particles are fluidized and continuously output from the discharge pipe 3.

[0039] When the stored biomass material is almost used up, the first motor 7 can rotate the inner air distribution plate 9 180° so that the second nozzle 94 outputs gas downwards. In conjunction with the outer air distribution plate 8 which is still outputting gas upwards, the deposited biomass particles can be blown up again for reuse, improving the full utilization of the material. The plate is reset after all the material has been used up.

[0040] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0041] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A biomass fluidized bed device, comprising a chamber (1) and a support frame (12), characterized in that: The support frame (12) is fixedly installed with a silo body (1), a screw conveyor (15), an air pump (13) and a first motor (7). A collection box (5) is provided at the center of the silo body (1). The output end of the screw conveyor (15) extends into the silo body (1) and is connected to the collection box (5). A second motor (2) is fixedly installed on the top of the silo body (1). A drive shaft (4) is fixedly installed on the output end of the second motor (2). The lower end of the drive shaft (4) passes through the collection box (5) and is fixedly installed with a uniformly distributed net (6). An outer air distribution plate (8) and an inner air distribution plate (9) are provided on the lower side of the interior of the silo body (1). The inner air distribution plate (9) is located inside the outer air distribution plate (8). The outer air distribution plate (8) is connected to the air pump (13). One end of the inner air distribution plate (9) is connected to the outer air distribution plate (8). The other end of the inner air distribution plate (9) is fixedly installed with the output end of the first motor (7).

2. The biomass fluidized bed device according to claim 1, characterized in that: The external air distribution coil (8) includes a main pipe (81), a first C-shaped pipe (82) and a first nozzle (83). The main pipe (81) is installed through the lower side wall of the chamber (1). The end of the main pipe (81) located outside the chamber (1) is connected to the air pump (13). At least one pair of first C-shaped pipes (82) are fixedly installed on both sides of the main pipe (81). One end of the first C-shaped pipe (82) is connected to the main pipe (81) and the other end is closed. There is a gap between the closed ends of each pair of first C-shaped pipes (82). The first nozzle (83) is evenly connected to the upper side of the first C-shaped pipe (82).

3. A biomass fluidized bed device according to claim 2, characterized in that: The inner air distribution plate (9) includes a rotary joint (91), a second C-shaped pipe (92), and a secondary pipe (93). One end of the secondary pipe (93) is connected to the main pipe (81) through the rotary joint (91), and the other end of the secondary pipe (93) is fixedly connected to the output end of the first motor (7) through a transmission rod. The transmission rod is located inside the notch and is rotatably connected to the side wall of the chamber (1). At least one pair of second C-shaped pipes (92) are fixedly installed on both sides of the secondary pipe (93). Both ends of the second C-shaped pipes (92) are connected to the secondary pipe (93), and a second nozzle (94) is uniformly connected to the upper side of the second C-shaped pipes (92).

4. A biomass fluidized bed device according to claim 1, characterized in that: The number of the screw conveyors (15) is 2 to 4, arranged in a circular pattern.

5. A biomass fluidized bed device according to claim 1, characterized in that: Several pairs of stirring rods (14) are fixedly installed on the circumference of the drive shaft (4). The stirring rods (14) are located inside the collection box (5). The top center of the collection box (5) is rotatably assembled with the drive shaft (4). The bottom of the collection box (5) gradually shrinks and is provided with a discharge port.

6. A biomass fluidized bed device according to claim 1, characterized in that: The uniformly distributed net (6) is a disc-shaped structure with an upward convexity at the center.

7. A biomass fluidized bed device according to claim 1, characterized in that: The bottom of the compartment (1) is a hemispherical shell (11).

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