A leakage-proof vibration fluidized bed roasting furnace

Abstract

The present invention provides a leakage-proof vibrating fluidized bed roasting furnace, which relates to the technical field of material roasting. The roasting furnace includes an upper box, a lower box, and a gas distribution plate arranged between the upper box and the lower box; the upper box is mainly used for feeding, discharging, and discharging heat medium; the lower box is mainly used for entering heat medium, and vibration motors are symmetrically and tiltedly arranged in the middle of the front and rear sides. The excitation force generated by the motors drives the entire equipment to vibrate, causing the material to slide and throw forward on the gas distribution plate; circular holes are evenly arranged on the gas distribution plate for the heat medium to pass through; baffles are provided above the circular holes; one end of the baffle is fixed to the gas distribution plate by a rotating shaft, so that the other end can rotate a certain angle around the rotating shaft; the baffle can completely cover its corresponding circular hole when it falls. The present invention can effectively prevent material particles from entering the lower box by the baffle plate arranged on the gas distribution plate, thereby achieving the purpose of preventing material leakage.

Description

Technical Field

[0001] The invention relates to the technical field of material roasting, in particular to a leakage-proof vibration fluidized roasting furnace. Background Art

[0002] Material roasting is the process of using heat to remove impurities from materials or to cause materials to undergo chemical reactions to generate new chemical substances. Fluidized bed roasters are a widely used type of equipment. A simple fluidized bed generally keeps the material in a fluidized state. As materials are continuously added, the bed thickness continues to increase, and roasted products are produced through the overflow plate at the outlet. A vibrating fluidized bed roaster uses the excitation force generated by the vibration motor during operation to vibrate the fluidized bed (vibrating part), causing the material on the gas distribution plate to slide and throw. Under the combined action of the heat medium passing through the distribution plate, the material above the distribution plate produces unidirectional movement and undergoes high-temperature roasting.

[0003] During the operation of a vibrating fluidized bed, the material is heated to a certain temperature, and after a certain period of time, the roasting result is achieved, and a qualified product is produced at the outlet. However, during a breakdown or production stoppage for maintenance, due to the lack of heat medium intervention or abnormal operation, the perforation speed of the heat medium through the distribution plate decreases. At this time, material particles will fall through the gas distribution plate into the lower box, causing material accumulation and loss. Long-term accumulation will cause the gas chamber to become clogged, and normal operation will be impossible. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a leakage-proof vibrating fluidized bed roasting furnace in response to the above-mentioned deficiencies in the prior art, which can effectively solve the problem of material particles leaking from the pores of the gas distribution plate to the gas chamber during operation, maintenance or shutdown of the existing vibrating fluidized bed roasting furnace.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0006] A leakage-proof vibrating fluidized roasting furnace comprises an upper box body, a lower box body and a gas distribution plate arranged between the upper box body and the lower box body;

[0007] One end of the upper box body is provided with a feed port, the outside of the feed port is connected to the air lock through a soft connection, and the feed port is inwardly connected to the internal space of the upper box body; the top surface of the upper box body is provided with an ash return port and a heat medium outlet; the heat medium outlet is connected to the air inlet of the cyclone bag separation integrated machine; the ash return port is externally connected to the discharge port of the cyclone bag separation integrated machine, and the ash return port is inwardly connected to the feed port; the other end of the upper box body is connected to the discharge port, and the discharge port is externally connected to the air lock valve through a soft connection, and is connected to the next process through the outlet of the air lock valve;

[0008] A heat medium inlet is provided on the side wall of the lower box; vibration motors are symmetrically and obliquely arranged in the middle of the front and rear sides of the lower box, and the excitation force generated by them drives the entire equipment to vibrate, causing the material to slide and throw forward on the gas distribution plate; a discharge port is provided at the lower part of one end of the lower box for discharging material that has fallen into the lower box when production is stopped;

[0009] The gas distribution plate is evenly provided with circular holes for the passage of heat medium gas flow; a baffle is provided above each of the circular holes; one end of the baffle is fixed to the gas distribution plate via a rotating shaft, so that the other end can rotate around the rotating shaft at a certain angle; when the baffle falls, it can completely cover the corresponding circular hole;

[0010] The material enters the upper box from the feed port through the air-locking device and falls onto the gas distribution plate. The heat medium enters the lower box through the heat medium inlet and is evenly distributed upward through the gas distribution plate. Under the combined action of the heat medium and vibration, the material slides and throws on the gas distribution plate toward the discharge port at the other end of the upper box. During the movement, the heat medium gradually raises the temperature of the material through heat exchange to reach the temperature required for the reaction. After a certain period of time, the material is roasted and finally discharged through the discharge port to the next process.

[0011] The maximum rotation angle of the baffle plate is limited by a limit block.

[0012] The limiting end of the limiting block can be adjusted, so as to adjust the value of the maximum rotation angle of the material blocking plate.

[0013] One end of the baffle plate is welded to one side of the hinge, and the other side of the hinge is welded to the gas distribution plate as a fixed end, so that the other end of the baffle plate can rotate around the hinge axis; a limit block is fixedly set on the gas distribution plate next to the hinge.

[0014] The limit block includes a nut and a fully threaded bolt, wherein the nut is welded to the gas distribution plate, the bolt passes through the nut parallel to the gas distribution plate, and the elongation of the bolt can be adjusted by rotating the bolt, and the end of the bolt is the limit end.

[0015] The fixing point at the lower end of the lower box body is installed on the basic bracket through a vibration isolation spring.

[0016] The inner wall of the upper box body, the inner wall of the lower box body, and the inner walls of the heat medium inlet, the heat medium outlet, the discharge port, and the discharge port are all provided with a thermal insulation layer.

[0017] The stepless adjustment of the running time of the material on the gas distribution plate is achieved by adjusting the installation angle of the vibration motor or adjusting the frequency of the vibration motors on both sides through a frequency converter.

[0018] The beneficial effect of adopting the above technical solution is that the leakage-proof vibrating fluidized bed roasting furnace provided by the present invention can effectively prevent material particles from entering the lower box body through the material baffle plate provided on the gas distribution plate, thereby achieving the purpose of leakage prevention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic structural diagram of a leakage-proof vibration fluidized bed roasting furnace provided in an embodiment of the present invention;

[0020] Figure 2 for Figure 1 AA cross-sectional view;

[0021] Figure 3 A schematic structural diagram of a material baffle of a gas distribution plate provided in an embodiment of the present invention in a windless state;

[0022] Figure 4 A schematic structural diagram of the material baffle of the gas distribution plate provided in an embodiment of the present invention when there is wind;

[0023] Figure 5 A schematic diagram of the vibration fluidized bed roasting process provided in an embodiment of the present invention.

[0024] In the figure: 1. Feed inlet; 2. Air lock; 3. Flexible connection; 4. Gas distribution plate; 5. Lower box; 6. Vibration isolation spring; 7. Heat medium inlet; 8. Discharge port; 9. Air lock valve; 10. Ash return port; 11. Cyclone bag separator; 12. Air outlet; 13. Fan; 14. Discharge port; 15. Vibration motor; 16. Heat medium outlet; 17. Upper box; 18. Limit block; 19. Hinge; 20. Baffle plate; 21. Thermal insulation layer; 22. Foundation bracket. DETAILED DESCRIPTION

[0025] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0026] A leakage-proof vibrating fluidized bed roasting furnace, such as Figure 1 As shown, it includes an upper box body 17, a lower box body 5 and a gas distribution plate 4 arranged between the upper box body 17 and the lower box body 5.

[0027] One end of the upper box body 17 is provided with a feed port 1, and the outside of the feed port 1 is connected to the air lock 2 through a flexible connection 3, and the feed port 1 is inwardly connected to the internal space of the upper box body 17. An ash return port 10 and a heat medium outlet 16 are provided on the top surface of the upper box body 17. The heat medium outlet 16 is connected to the air inlet of the cyclone bag type separation all-in-one machine 11. The ash return port 10 is externally connected to the discharge port of the cyclone bag type separation all-in-one machine 11, and the ash return port 10 is inwardly connected to the feed port 1 and the interior of the upper box body 17. The other end of the upper box body 17 is connected to the discharge port 8, and the discharge port 8 is externally connected to the air lock valve 9 through a flexible connection 3, and is connected to the next process through the outlet of the air lock valve 9.

[0028] The side walls of the lower housing 5 are provided with a heat medium inlet 7. Vibration motors 15 are symmetrically arranged at an angle on the front and rear sides of the lower housing 5. The excitation force generated by these motors drives the entire device to vibrate, causing the material to slide and be thrown forward. A discharge port 14 is provided at the bottom of one end of the lower housing 5 to discharge material that has fallen into the lower housing 5 during production interruptions. The lower end of the lower housing 5 is fixed to the base bracket 22 via a vibration isolation spring 6.

[0029] Inside the equipment, namely the inner wall of the upper box body 17, the inner wall of the lower box body 5, and the inner wall of the heat medium inlet 7, the heat medium outlet 16, the discharge port 14, and the discharge port 8 are all provided with a heat insulation layer 21. Figure 2 As shown, it prevents high temperature from damaging the outer wall of the equipment and preventing heat loss.

[0030] Circular holes are evenly arranged on the gas distribution plate 4 for the passage of heat medium airflow. During the movement of the material in the vibrating fluidized bed, due to the uneven material particles, some particles will fall into the lower box 5 through the circular holes of the gas distribution plate 4. In order to avoid the occurrence of this working condition as much as possible, a baffle plate 20 is added to the gas distribution plate 4. A baffle plate 20 is provided above the circular holes. One end of the baffle plate 20 is welded to one side of the hinge 19, and the other side of the hinge 19 is welded to the gas distribution plate 4 as a fixed end, so that the other end of the baffle plate 20 can rotate around the axis of the hinge 19. The baffle plate 20 can completely cover its corresponding circular hole when it falls. A limit block 18 is fixedly provided on the gas distribution plate 4 next to the hinge 19. The limit block 18 includes a nut and a fully threaded bolt, wherein the nut is welded to the gas distribution plate 4, the bolt passes through the nut parallel to the gas distribution plate 4, and the elongation of the bolt can be adjusted by rotating the bolt. The end of the bolt is the limit end, and the maximum rotation angle value of the baffle plate 20 is limited by the limit end.

[0031] When no heat medium passes through, the baffle plate 20 falls on the gas distribution plate 4 due to its own gravity to block the air holes and prevent the material from falling. Figure 3 When the equipment is running and heat medium enters, the baffle plate 20 is blown up by the heat medium and forms a certain angle with the gas distribution plate 4, as shown in FIG. Figure 4As shown, the maximum value of this angle can be adjusted by adjusting the position of the extendable stopper 18 to prevent obstruction to material movement. The size of this angle is generally determined based on field experience and on-site commissioning. As the material moves toward the outlet, it moves along the step formed by the baffle plate 20 and does not pass through the gas distribution plate 4 into the lower chamber 5, thereby preventing leakage.

[0032] During the roasting process of the leakage-proof vibrating fluidized roasting furnace of this embodiment, Figure 5 As shown, the material enters the upper housing 17 through the air lock 2 at the feed port 1 and falls onto the gas distribution plate 4. The heat medium enters the lower housing 5 through the heat medium inlet 7 and is evenly distributed upward through the gas distribution plate 4, establishing a suitable operating speed. This operating speed lies between the material's settling velocity and the critical fluidization velocity. Unlike a simple fluidized bed, due to the intervention of vibration, the lower limit of this operating speed can be appropriately lowered, but it should not be so low that a large amount of material leaks from the air holes of the gas distribution plate 4. On-site debugging is required to ensure that the material can fluidize normally without leakage. At the same time, the material is subjected to the excitation force generated by the symmetrically tilted vibration motors 15 on both sides of the equipment. Under the combined action of the heat medium and vibration, the material gradually slides and is thrown from the feed end to the discharge end. During this movement, the heat medium gradually raises the material temperature through heat exchange, reaching the required reaction temperature. After a certain period of time, the material is roasted and discharged through the discharge port 8 to the next process. Since different materials require different reaction times, the material running time can be adjusted steplessly by adjusting the installation angle of the vibration motor 15 or by adjusting the frequency of the vibration motors on both sides through a frequency converter.

[0033] The airflow enters the lower box 5 through the heat medium inlet 7, and then passes through the gas distribution plate 4 to be discharged evenly or obliquely upward. After heat exchange with the material (sometimes a chemical reaction), the temperature of the heat medium is reduced, and the heat medium enters the cyclone bag separator 11 from the heat medium outlet 16 to recover the material. Finally, the purified medium is extracted to the next process by the fan 13. Some fine particles will be discharged from the heat medium outlet 16 with the airflow. When entering the cyclone bag separator 11, some particles will be collected by the lower cyclone separation part, and the remaining particles will be captured by the upper bag separation part and then fall back into the lower cyclone separation part. The two captured materials will finally re-enter the equipment through the ash return port 10.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or make equivalent replacements for some or all of the technical features therein. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope defined by the claims of the present invention.

Claims

1. A leakage-proof vibration fluidized bed roasting furnace, characterized in that: It comprises an upper box body (17), a lower box body (5), and a gas distribution plate (4) arranged between the upper box body (17) and the lower box body (5); One end of the upper box body (17) is provided with a feed port (1), the outside of the feed port (1) is connected to the air lock (2) through a soft connection (3), and the feed port (1) is connected inwardly to the internal space of the upper box body (17); a dust return port (10) and a heat medium outlet (16) are provided on the top surface of the upper box body (17); the heat medium outlet (16) is connected to the air inlet of the cyclone bag type separation integrated machine (11); the ash return port (10) is connected outwardly to the discharge port of the cyclone bag type separation integrated machine (11), and the ash return port (10) is connected inwardly to the feed port (1); the other end of the upper box body (17) is connected to the discharge port (8), and the discharge port (8) is connected outwardly to the air lock valve (9) through a soft connection (3), and is connected to the next process through the outlet of the air lock valve (9); A heat medium inlet (7) is provided on the side wall of the lower box (5); vibration motors (15) are symmetrically and obliquely arranged in the middle of the front and rear sides of the lower box (5), and the exciting force generated by the vibration drives the entire device to vibrate, causing the material to slide and throw forward on the gas distribution plate (4); a discharge port (14) is provided at the lower part of one end of the lower box (5) for discharging the material that falls into the lower box (5) when production is stopped; the fixing point of the lower end of the lower box (5) is fixed to the base bracket (22) through a vibration isolation spring (6); Circular holes are evenly arranged on the gas distribution plate (4) for the passage of heat medium airflow; baffle plates (20) are arranged above the circular holes; one end of the baffle plate (20) is rotatably fixed on the gas distribution plate (4) so ​​that the other end can rotate around the rotation axis at a certain angle; when the baffle plate (20) falls, it can completely cover the corresponding circular hole; the maximum rotation angle of the baffle plate (20) is limited by a limit block (18); the limit end of the limit block (18) can be adjusted to adjust the value of the maximum rotation angle of the baffle plate (20); one end of the baffle plate (20) is welded to one side of the hinge (19), and the other side of the hinge (19) is welded to the gas distribution plate (4) as a fixed end so that the other end of the baffle plate (20) can rotate around the axis of the hinge (19); a limit block (18) is fixedly arranged on the gas distribution plate (4) next to the hinge (19); The limit block (18) comprises a nut and a fully threaded bolt, wherein the nut is welded to the gas distribution plate (4), the bolt passes through the nut and is parallel to the gas distribution plate (4), and the elongation of the bolt can be adjusted by rotating the bolt, and the end of the bolt is a limit end.

2. The leakage-proof vibration fluidized bed roasting furnace according to claim 1, characterized in that: The inner wall of the upper box body (17), the inner wall of the lower box body (5), and the inner walls of the heat medium inlet (7), the heat medium outlet (16), the discharge port (14), and the discharge port (8) are all provided with a thermal insulation layer (21).

3. The leakage-proof vibration fluidized bed roasting furnace according to claim 1, characterized in that: The stepless adjustment of the running time of the material on the gas distribution plate (4) is achieved by adjusting the installation angle of the vibration motor (15) or adjusting the frequency of the vibration motors (15) on both sides by a frequency converter.

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