Fluidized bed furnace for mine

Abstract

The utility model relates to the technical field of fluidized bed furnaces, and discloses a mine fluidized bed furnace which comprises a furnace body, an air distribution plate is installed on the inner wall of the furnace body, a plurality of air caps are installed at the top of the air distribution plate, conical plates are arranged in the air caps, steel balls are fixedly connected to the outer surfaces of the conical plates, and frame plates are fixedly connected to the bottom ends of the conical plates. A hydraulic cylinder is connected to the lower surface of the frame plate, a conical ring body is fixedly connected to the inner top face of the hood, a feeding pipe is fixedly connected to the outer wall of the furnace body, and a discharging pipe is connected to the top end of the feeding pipe. According to the utility model, air is supplied to the air inlet pipe through the fan, and the air is discharged through the air distribution plate and the conical hole of the air cap to blow air to materials, so that the materials form a good fluidized state in the furnace body, and sufficient roasting is facilitated; the conical plate and other components are arranged in the hood, the conical plate is withdrawn during normal air blowing without affecting air outlet, if the conical hole of the hood is seriously blocked, the hydraulic cylinder can be used for driving the conical plate to ascend, the steel balls can extrude blocked impurities, and the air outlet capacity of the hood is recovered.

Description

Technical Field

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

[0002] A fluidized bed furnace is a device that burns solid fuels in a fluidized (boiling) state within the furnace. Its working principle involves using a high-speed airflow introduced from the bottom of the furnace to lift solid particles (such as ore or coal) within the furnace, causing them to churn violently within a certain height range, much like a boiling liquid. This achieves full contact between the fuel and air, resulting in rapid combustion.

[0003] According to a search, Chinese patent document, publication number CN221897782U, discloses a fluidized bed furnace for uniform boiling. A working mechanism is installed inside the working chamber. Air is introduced through an external air pump connected to an arc-shaped baffle. The granules are drawn towards the baffle by the airflow, causing them to move with the curvature of the baffle and form a turbulent flow. This results in uniform boiling of the granules within the furnace, achieving the goal of uniform heating.

[0004] However, the aforementioned fluidized bed furnace still has the following problems in actual use: In the actual operation of the fluidized bed furnace, the air cap, as a key component, is located on the air distribution device at the bottom of the furnace body. Its main function is to evenly distribute the air entering the furnace to ensure that the material can form a good fluidization state inside the furnace. However, due to the complex composition of the ore, various forms and properties of slag are generated during the roasting process. Some of the slag may have high viscosity and easily adhere to the ventilation holes around the air cap, causing blockage of the air cap and making air circulation inside the furnace difficult. Current technology relies on manual cleaning, which is very inconvenient. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this utility model provides a fluidized bed furnace for mining, which has the advantages of facilitating the cleaning of slag clogging the air cap, thereby ensuring normal air supply to the fluidized bed furnace, and solves the aforementioned technical problems.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model provides the following technical solution: a fluidized bed furnace for mining, comprising a furnace body, an air distribution plate installed on the inner wall of the furnace body, multiple air caps installed on the top of the air distribution plate, a conical plate inside the air cap, steel balls fixedly connected to the outer surface of the conical plate, and a frame plate fixedly connected to the bottom end of the conical plate, a hydraulic cylinder connected to the lower surface of the frame plate, a conical ring fixedly connected to the inner top surface of the air cap, a feed pipe fixedly connected to the outer wall of the furnace body, a discharge pipe connected to the top of the feed pipe, a feeding hopper fixedly connected to the top of the discharge pipe, a distributing roller rotatably connected inside the discharge pipe, and a stepper motor installed on the outer surface of the discharge pipe.

[0009] Preferably, a flue gas exhaust pipe is fixedly connected to the top of the furnace body, and an air inlet pipe is installed at the bottom of the furnace body, with a fan connected to one end of the air inlet pipe.

[0010] Preferably, the wind cap includes four conical holes on its outer peripheral surface, and four conical plates are provided, with the bottom ends of the four conical plates connected as one unit.

[0011] Preferably, the hydraulic cylinders are provided in four sets, and the cylinder ends of the four hydraulic cylinders are installed at the bottom of the furnace body.

[0012] Preferably, a material distribution groove is formed on the outer circumferential surface of the material distribution roller, and the output shaft of the stepper motor is connected to the material distribution roller.

[0013] Preferably, several sets of thermocouples are installed on the inner wall of the furnace body, and an overflow port is provided on the outer surface of the furnace body.

[0014] Compared with the prior art, this utility model provides a fluidized bed furnace for mining, which has the following beneficial effects:

[0015] 1. This utility model uses a blower to send air into the air inlet pipe. The air is discharged through the conical holes of the air distribution plate and the air cap to blow air onto the material, so that the material forms a good fluidization state in the furnace body, which is conducive to full roasting. The air cap is equipped with components such as a conical plate. During normal blowing, the conical plate retracts without affecting the air outlet. If the conical hole of the air cap is severely blocked, a hydraulic cylinder can be used to drive the conical plate to rise. The steel balls can squeeze out the blocking impurities, restore the air outlet capacity of the air cap, and ensure the air circulation inside the furnace body.

[0016] 2. This utility model can achieve quantitative feeding. The stepper motor drives the distribution roller to rotate, and the distribution groove on the distribution roller can quantitatively feed the ore material into the feed pipe, ensuring that the amount of material entering the furnace is appropriate and can be uniformly fluidized, thus ensuring the stability and efficiency of the reaction. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural schematic diagram of the present utility model;

[0018] Figure 2 This is a front view of the structure of this utility model;

[0019] Figure 3 This is a schematic cross-sectional view of the structure of this utility model;

[0020] Figure 4 This is a partial three-dimensional schematic diagram of the structure of this utility model;

[0021] Figure 5 This is a three-dimensional cross-sectional view of the components such as the wind cap, conical plate, and steel ball in this utility model.

[0022] The components are as follows: 1. Furnace body; 2. Air distribution plate; 3. Air cap; 4. Conical plate; 5. Steel ball; 6. Frame plate; 7. Hydraulic cylinder; 8. Conical ring; 9. Feed pipe; 10. Discharge pipe; 11. Feed hopper; 12. Distributor roller; 13. Stepper motor; 14. Flue gas exhaust pipe; 15. Air inlet pipe; 16. Fan; 17. Thermocouple; 18. Overflow port. Detailed Implementation

[0023] 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.

[0024] Please see Figures 1-5 A fluidized bed furnace for mining includes a furnace body 1, characterized in that: an air distribution plate 2 is installed on the inner wall of the furnace body 1, a plurality of air caps 3 are installed on the top of the air distribution plate 2, a conical plate 4 is arranged inside the air cap 3, steel balls 5 are fixedly connected to the outer surface of the conical plate 4, and a frame plate 6 is fixedly connected to the bottom end of the conical plate 4. A hydraulic cylinder 7 is connected to the lower surface of the frame plate 6. A conical ring 8 is fixedly connected to the inner top surface of the air cap 3. A feed pipe 9 is fixedly connected to the outer wall of the furnace body 1, a discharge pipe 10 is connected to the top of the feed pipe 9, a feeding hopper 11 is fixedly connected to the top of the discharge pipe 10, a distributing roller 12 is rotatably connected inside the discharge pipe 10, and a stepper motor 13 is installed on the outer surface of the discharge pipe 10.

[0025] Specifically, a flue gas exhaust pipe 14 is fixedly connected to the top of the furnace body 1, and an air inlet pipe 15 is installed at the bottom of the furnace body 1, with a blower 16 connected to one end of the air inlet pipe 15. The advantage is that when the crushed ore material is fed into the furnace body 1, air can be sent into the air inlet pipe 15 by starting the blower 16. In this way, the air force enters the bottom of the air distribution plate 2 and is then discharged from the conical holes of each air cap 3. This can blow air onto the material, so that the material forms a good fluidization state in the furnace body 1, which can promote the full roasting of the raw materials.

[0026] Specifically, the wind cap 3 includes four conical holes on its outer circumference, four conical plates 4 are provided, and the bottom ends of the four conical plates 4 are connected as one unit. Four sets of hydraulic cylinders 7 are provided, and the cylinder ends of the four hydraulic cylinders 7 are installed at the bottom of the furnace body 1. The advantage is that when the air is blown, the hydraulic cylinder 7 is in a retracted state. At this time, the frame plate 6 drives multiple conical plates 4 to retract from the inside of the air cap 3, so as not to block the conical hole of the air cap 3, and thus not to affect the air from the conical hole of the air cap 3. However, once the conical hole of the air cap 3 is severely blocked by sticky material, the hydraulic cylinder 7 can be activated to drive the frame plate 6 to rise. The frame plate 6 drives multiple conical plates 4 to rise. When the conical plates 4 enter the inside of the air cap 3 and encounter the conical ring 8, they will be opened. In this way, the four steel balls 5 can just enter the conical hole of the air cap 3, which can squeeze out the impurities blocking the conical hole of the air cap 3. Afterwards, the hydraulic cylinder 7 can be reset to restore the air output capacity of the air cap 3, thus ensuring the air circulation inside the furnace body 1.

[0027] Specifically, a distribution groove is provided on the outer circumferential surface of the distribution roller 12, and the output shaft of the stepper motor 13 is connected to the distribution roller 12. The advantage is that the crushed ore material is fed into the feeding hopper 11 by the elevator, and the distribution roller 12 can be driven to rotate intermittently by starting the stepper motor 13 during the feeding process of the furnace body 1. After the distribution roller 12 rotates once, the distribution groove on its outer surface will send a part of the ore material into the feed pipe 9. In this way, by controlling the number of rotations of the stepper motor 13, quantitative feeding can be achieved. Quantitative feeding can ensure that the amount of material entering the furnace body 1 is always kept within a suitable range, so that the material can be uniformly fluidized in the furnace body 1, and each particle has enough opportunity to be fully mixed with the hot air, thereby ensuring the stability and efficiency of the reaction.

[0028] Specifically, several sets of thermocouples 17 are installed on the inner wall of the furnace body 1, and an overflow port 18 is provided on the outer surface of the furnace body 1. The advantage is that by installing several sets of thermocouples 17 on the inner wall of the furnace body 1, real-time and accurate temperature measurement of multiple key locations inside the furnace can be achieved. During the roasting or processing of materials such as ores in the fluidized bed furnace, the materials undergo a series of physical and chemical changes, and their volume, density, and other properties will change. When the roasted material reaches a certain amount, it will accumulate to a certain height inside the furnace. At this time, the overflow port 18 plays the role of automatically discharging the material. At the same time, a slag discharge valve is also provided at the bottom of the furnace body 1. When a large amount of ash and slag accumulates inside the furnace body 1, the slag discharge valve is opened to discharge the slag.

[0029] In operation, the crushed ore is first fed into the feeding hopper 11 via an elevator. During the feeding process of the furnace body 1, the stepper motor 13 is started, intermittently driving the distribution roller 12 to rotate. The distribution trough feeds a portion of the ore into the feed pipe 9. Quantitative feeding is achieved by controlling the number of rotations of the stepper motor 13. After the ore is placed inside the furnace body 1, the blower 16 is started to blow air into the air inlet pipe 15. The air enters the bottom of the air distribution plate 2 and exits from the conical holes of each air cap 3, blowing air onto the material to create a fluidized state within the furnace body 1, promoting thorough roasting of the raw materials. It should be noted that when the air is blown, the hydraulic cylinder 7 is in a retracted state, and the frame plate 6 drives the conical plate 4 to retract from the inside of the air cap 3. If the conical hole of the air cap 3 is severely blocked by sticky material, the hydraulic cylinder 7 is activated so that its output end drives the frame plate 6 to rise. The conical plate 4 enters the inside of the air cap 3 and is opened after encountering the conical ring 8. The steel ball 5 enters the conical hole and squeezes out the blockage impurities. The hydraulic cylinder 7 is reset to restore the air output capacity of the air cap 3. Several sets of thermocouples 17 are installed on the inner wall of the furnace body 1 to measure the temperature of multiple key positions in the furnace in real time. When the roasted material accumulates to a certain height in the furnace, it is automatically discharged through the overflow port 18.

[0030] 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 fluidized bed furnace for mining, comprising a furnace body (1), characterized in that: An air distribution plate (2) is installed on the inner wall of the furnace body (1). Multiple air caps (3) are installed on the top of the air distribution plate (2). A conical plate (4) is provided inside the air cap (3). A steel ball (5) is fixedly connected to the outer surface of the conical plate (4). A frame plate (6) is fixedly connected to the bottom end of the conical plate (4). A hydraulic cylinder (7) is connected to the lower surface of the frame plate (6). A conical ring (8) is fixedly connected to the top surface of the air cap (3). A feed pipe (9) is fixedly connected to the outer wall of the furnace body (1). A discharge pipe (10) is connected to the top end of the feed pipe (9). A feeding hopper (11) is fixedly connected to the top end of the discharge pipe (10). A material distribution roller (12) is rotatably connected inside the discharge pipe (10). A stepper motor (13) is installed on the outer surface of the discharge pipe (10).

2. The fluidized bed furnace for mining according to claim 1, characterized in that: A flue gas exhaust pipe (14) is fixedly connected to the top of the furnace body (1), and an air inlet pipe (15) is installed at the bottom of the furnace body (1). One end of the air inlet pipe (15) is connected to a fan (16).

3. A fluidized bed furnace for mining according to claim 1, characterized in that: The wind cap (3) includes four conical holes on its outer circumference, and four conical plates (4) are provided, with the bottom ends of the four conical plates (4) connected as one unit.

4. A fluidized bed furnace for mining according to claim 1, characterized in that: The hydraulic cylinders (7) are provided in four sets, and the cylinder ends of the four hydraulic cylinders (7) are installed at the bottom of the furnace body (1).

5. A fluidized bed furnace for mining according to claim 1, characterized in that: The outer circumferential surface of the distributing roller (12) is provided with a distributing groove, and the output shaft of the stepper motor (13) is connected to the distributing roller (12).

6. A fluidized bed furnace for mining according to claim 1, characterized in that: Several sets of thermocouples (17) are installed on the inner wall of the furnace body (1), and an overflow port (18) is opened on the outer surface of the furnace body (1).

Images