Waste heat recovery heat exchanger of vertical tank magnesium smelting furnace

Abstract

The utility model relates to the technical field of waste heat recovery, and discloses a waste heat recovery heat exchanger of a vertical tank magnesium smelting furnace, which comprises a storage bin, a heat insulation plate is arranged outside the storage bin, and heat insulation cotton is filled between the storage bin and the heat insulation plate. According to the waste heat recovery heat exchanger of the vertical tank magnesium smelting furnace, the heat preservation plate, the heat preservation cotton and the drainage pipe are arranged, the heat exchange pipeline is wound outside the storage bin, magnesium slag can be prevented from falling into the storage bin and accidentally damaging the heat exchange pipeline, and therefore the heat exchange pipeline can be protected; the water pump pumps cooling water to enable the cooling water to flow in the heat exchange pipeline, the heat exchange pipeline is tightly wound outside the storage bin, so that heat of magnesium slag can be continuously led out, the heat insulation plate and the heat insulation cotton can perform heat insulation on the interior of the storage bin, the defect that the waste heat boiler is low in efficiency is overcome, the heat exchange effect is enhanced, and the service life of the magnesium slag is prolonged. The problems that a heat exchange pipeline is prone to being smashed due to falling of original magnesium slag, and the efficiency of a waste heat boiler is low are solved.

Description

Technical Field

[0001] This utility model relates to the field of waste heat recovery technology, specifically a waste heat recovery heat exchanger for a vertical magnesia furnace. Background Technology

[0002] Magnesium smelting refers to the process of extracting metallic magnesium from minerals or compounds containing magnesium. A vertical furnace is required for magnesium smelting. Magnesium smelting in a vertical furnace is a solid-phase reaction under vacuum conditions. The reaction rate is related to the fineness of the furnace charge, the reduction temperature, and the residual pressure of the system. In order to recover and utilize the waste heat generated during the production process, a waste heat recovery heat exchanger for the vertical furnace is required.

[0003] There are still some problems with the waste heat recovery heat exchangers of common vertical magnesia furnaces, such as: the cooling water pipes are located inside the storage silo, and the falling magnesia slag can easily damage the heat exchange pipes; and the waste heat boiler has low efficiency.

[0004] Therefore, we propose a waste heat recovery heat exchanger for a vertical magnesia furnace to improve the above-mentioned problems. Utility Model Content

[0005] The purpose of this utility model is to provide a waste heat recovery heat exchanger for a vertical magnesia furnace, so as to solve the problems mentioned in the background art, such as the easy damage to the heat exchange pipes caused by falling magnesia slag and the low efficiency of the waste heat boiler.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a waste heat recovery heat exchanger for a vertical magnesium smelting furnace, comprising a storage silo, an insulation board installed on the outside of the storage silo, insulation cotton filled between the storage silo and the insulation board, support legs fixedly connected to the front and rear ends of both sides of the bottom of the storage silo, a discharge port fixedly connected to the middle position of the bottom of the storage silo, a closed perforated plate installed at the top of the storage silo, a water pump installed at the top left side of the insulation board, heat exchange pipes fixedly connected to the input and output ends of the water pump, a support plate fixedly connected to the right side of the support legs, a water tank installed at the top of the support plate, a drain pipe fixedly connected to the bottom right side of the water tank, and a valve installed inside the drain pipe.

[0007] As a further technical solution of this utility model, the heat exchange pipe is wound around the outside of the storage silo, and the right side of the heat exchange pipe is fixedly connected to the top of the left side of the water tank.

[0008] As a further technical solution of this utility model, the discharge port penetrates the bottom end of the insulation board, and the heat exchange pipe penetrates the left and right sides of the insulation board.

[0009] As a further technical solution of this utility model, a second motor is installed at the middle position of the top of the closed perforated plate, a connecting shaft is fixedly connected to the output end of the second motor, a spiral conveying shaft is fixedly connected to the bottom end of the connecting shaft, stirring rods are fixedly connected to the left and right sides of the connecting shaft, a cover plate is provided at the bottom of the outside of the discharge port, and a blocking block is fixedly connected to the top of the cover plate.

[0010] As a further technical solution of this utility model, the blocking block is embedded in the bottom end of the discharge port, and the bottom end of the spiral conveying shaft is set inside the discharge port.

[0011] As a further technical solution of this utility model, the stirring rods are arranged on the left and right sides inside the storage bin, and multiple sets of stirring rods are provided.

[0012] As a further technical solution of this utility model, a frame is provided on the left side of the bottom of the storage bin, a conveyor belt is provided inside the frame, a rotating shaft is movably connected to the left and right sides inside the frame, a drive wheel is provided outside the rotating shaft, and a first motor is installed on the right side of the front end of the frame.

[0013] As a further technical solution of this utility model, the drive wheel is arranged on the left and right sides inside the conveyor belt, the drive wheel and the conveyor belt cooperate with each other, and the output end of the first motor is connected to the rotating shaft through a coupling.

[0014] Compared with the prior art, the beneficial effects of this utility model are: the waste heat recovery heat exchanger of the vertical magnesia furnace not only facilitates the protection of the heat exchange pipes and the discharge of materials, but also facilitates the removal of magnesium slag.

[0015] (1) By setting up insulation boards, insulation cotton, heat exchange pipes, water pumps, water tanks and drain pipes, the heat exchange pipes are wrapped around the outside of the storage bin, which can prevent magnesium slag from falling into the inside of the storage bin and accidentally damaging the heat exchange pipes, thus protecting the heat exchange pipes. When the water pump is started, the water pump draws cooling water to make the cooling water flow inside the heat exchange pipes. Since the heat exchange pipes are tightly wrapped around the outside of the storage bin, the heat of the magnesium slag can be continuously discharged. The insulation boards and insulation cotton can insulate the inside of the storage bin, overcoming the disadvantage of low efficiency of using waste heat boilers and enhancing the heat exchange effect.

[0016] (2) By setting a second motor, stirring rod, connecting shaft, screw conveyor shaft, cover plate and block, when it is necessary to discharge magnesium slag from the inside of the storage bin, the cover plate is opened and the second motor is started after the cover plate is opened. The second motor drives the stirring rod and screw conveyor shaft to rotate through the connecting shaft. The rotation of the screw conveyor shaft can stir the magnesium slag inside the storage bin to prevent the magnesium slag in the center from not being discharged. The rotation of the screw conveyor shaft can facilitate the discharge of magnesium slag from the inside of the discharge port to prevent magnesium slag from getting stuck inside the discharge port and affecting the discharge.

[0017] (3) By setting up a first motor, a conveyor belt, a drive wheel and a rotating shaft, the discharged magnesium slag will fall to the top of the conveyor belt. Start the first motor, and the first motor will drive the conveyor belt to rotate through the rotating shaft and the drive wheel. The magnesium slag will be transported away by the conveyor belt, which can realize the continuous production of magnesium slag. Using the conveyor belt to transport magnesium slag can also prevent magnesium slag from accumulating at the bottom of the storage bin and affecting the environment. Attached Figure Description

[0018] Figure 1 This is a front view structural diagram of the present utility model;

[0019] Figure 2 This is a front view cross-sectional structural diagram of the storage silo of this utility model;

[0020] Figure 3 This is a side view of the frame structure of this utility model;

[0021] Figure 4 For the present utility model Figure 2 Enlarged cross-sectional view of point A in the middle.

[0022] In the diagram: 1. Storage silo; 2. Frame; 3. First motor; 4. Conveyor belt; 5. Support leg; 6. Drive wheel; 7. Shaft; 8. Insulation board; 9. Insulation cotton; 10. Heat exchange pipe; 11. Water pump; 12. Sealing orifice plate; 13. Second motor; 14. Water tank; 15. Valve; 16. Drain pipe; 17. Support plate; 18. Stirring rod; 19. Connecting shaft; 20. Screw conveyor shaft; 21. Cover plate; 22. Discharge port; 23. Block. 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 Figure 1-4This utility model provides an embodiment of a waste heat recovery heat exchanger for a vertical magnesia furnace, including a storage silo 1, an insulation board 8 on the outside of the storage silo 1, insulation cotton 9 filling the space between the storage silo 1 and the insulation board 8, support legs 5 fixedly connected to the front and rear ends of the bottom sides of the storage silo 1, a discharge port 22 fixedly connected to the middle position of the bottom of the storage silo 1, a closed perforated plate 12 on the top of the storage silo 1, a water pump 11 installed on the top left side of the insulation board 8, heat exchange pipes 10 fixedly connected to the input and output ends of the water pump 11, a support plate 17 fixedly connected to the right side of the support legs 5, a water tank 14 installed on the top of the support plate 17, a drain pipe 16 fixedly connected to the bottom right side of the water tank 14, and a valve 15 installed inside the drain pipe 16.

[0025] The heat exchange pipe 10 is wrapped around the outside of the storage silo 1. The right side of the heat exchange pipe 10 is fixedly connected to the top left side of the water tank 14. The discharge port 22 penetrates the bottom of the insulation board 8. The heat exchange pipe 10 penetrates the left and right sides of the insulation board 8.

[0026] Specifically, such as Figure 1 As shown, the heat exchange pipe 10 is wrapped around the outside of the storage silo 1 to prevent magnesium slag from falling into the storage silo 1 and accidentally damaging the heat exchange pipe 10, thus protecting the heat exchange pipe 10. The water pump 11 is started, and the water pump 11 draws cooling water to make the cooling water flow inside the heat exchange pipe 10. Since the heat exchange pipe 10 is tightly wrapped around the outside of the storage silo 1, the heat of the magnesium slag can be continuously discharged. The insulation board 8 and the insulation cotton 9 can insulate the inside of the storage silo 1, overcoming the disadvantage of low efficiency of using waste heat boiler and enhancing the heat exchange effect.

[0027] A second motor 13 is installed at the middle position of the top of the closed perforated plate 12. The output end of the second motor 13 is fixedly connected to a connecting shaft 19. The bottom end of the connecting shaft 19 is fixedly connected to a screw conveyor shaft 20. Stirring rods 18 are fixedly connected to the left and right sides of the connecting shaft 19. A cover plate 21 is provided at the bottom of the outside of the discharge port 22. A block 23 is fixedly connected to the top of the cover plate 21. The block 23 is embedded in the bottom of the inside of the discharge port 22. The bottom end of the screw conveyor shaft 20 is located inside the discharge port 22. The stirring rods 18 are located on the left and right sides inside the storage bin 1. Multiple sets of stirring rods 18 are provided.

[0028] Specifically, such as Figure 1 , Figure 2 and Figure 4As shown, when it is necessary to discharge magnesium slag from the inside of the storage silo 1, the cover plate 21 is opened. After opening the cover plate 21, the second motor 13 is started. The second motor 13 drives the stirring rod 18 and the screw conveyor shaft 20 to rotate through the connecting shaft 19. The rotation of the screw conveyor shaft 20 can agitate the magnesium slag inside the storage silo 1 to prevent the magnesium slag in the center from not being discharged. The rotation of the screw conveyor shaft 20 can facilitate the discharge of magnesium slag from the inside of the discharge port 22, preventing the magnesium slag from getting stuck inside the discharge port 22 and affecting the discharge.

[0029] A frame 2 is provided on the left side of the bottom of the storage bin 1. A conveyor belt 4 is provided inside the frame 2. Rotary shafts 7 are movably connected to the left and right sides inside the frame 2. Drive wheels 6 are provided outside the rotating shafts 7. A first motor 3 is installed on the right side of the front end of the frame 2. The drive wheels 6 are located on the left and right sides inside the conveyor belt 4. The drive wheels 6 and the conveyor belt 4 cooperate with each other. The output end of the first motor 3 is connected to the rotating shaft 7 through a coupling.

[0030] Specifically, such as Figure 1 and Figure 3 As shown, the discharged magnesium slag will fall to the top of the conveyor belt 4. The first motor 3 is started. The first motor 3 drives the conveyor belt 4 to rotate through the rotating shaft 7 and the drive wheel 6. The magnesium slag is transported away by the conveyor belt 4, which can realize the continuous production of magnesium slag. Using the conveyor belt 4 to transport magnesium slag can also prevent magnesium slag from accumulating at the bottom of the storage bin 1 and affecting the environment.

[0031] Working Principle: In operation, the heat exchange pipe 10 is wrapped around the outside of the storage silo 1 to prevent magnesium slag from falling into the silo and damaging the pipe 10, thus protecting it. The water pump 11 is started, drawing cooling water that flows inside the heat exchange pipe 10. Because the pipe 10 is tightly wrapped around the outside of the storage silo 1, the heat from the magnesium slag is continuously dissipated. The insulation board 8 and insulation cotton 9 provide insulation for the inside of the storage silo 1, overcoming the low efficiency of using a waste heat boiler and enhancing the heat exchange effect. When it is necessary to discharge the magnesium slag from the inside of the storage silo 1, the cover plate 21 is opened. After opening the cover plate 21, the second... Motor 13, the second motor 13 drives the stirring rod 18 and the screw conveyor shaft 20 to rotate through the connecting shaft 19. The rotation of the screw conveyor shaft 20 can agitate the magnesium slag inside the storage bin 1, preventing the magnesium slag in the center from not being able to dissipate. The rotation of the screw conveyor shaft 20 can also facilitate the discharge of magnesium slag from the inside of the discharge port 22, preventing magnesium slag from getting stuck inside the discharge port 22 and affecting the discharge. The discharged magnesium slag will fall to the top of the conveyor belt 4. Start the first motor 3. The first motor 3 drives the conveyor belt 4 to rotate through the rotating shaft 7 and the drive wheel 6. The magnesium slag is transported away by the conveyor belt 4, which can realize the continuous production of magnesium slag. Using the conveyor belt 4 to transport magnesium slag can also prevent magnesium slag from accumulating at the bottom of the storage bin 1 and affecting the environment.

[0032] 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 in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A heat recovery exchanger of a vertical retort magnesium smelting furnace, comprising a storage bin (1), characterized in that: The storage silo (1) is provided with an insulation board (8) on the outside. Insulation cotton (9) is filled between the storage silo (1) and the insulation board (8). Support legs (5) are fixedly connected to the front and rear ends of the bottom sides of the storage silo (1). A discharge port (22) is fixedly connected to the middle position of the bottom of the storage silo (1). A closed perforated plate (12) is provided at the top of the storage silo (1). A water pump (11) is installed at the top left side of the insulation board (8). A heat exchange pipe (10) is fixedly connected to the input end and the output end of the water pump (11). A support plate (17) is fixedly connected to the right side of the support leg (5). A water tank (14) is provided at the top of the support plate (17). A drain pipe (16) is fixedly connected to the bottom right side of the water tank (14). A valve (15) is installed inside the drain pipe (16).

2. The heat recovery exchanger of a vertical tank magnesium smelting furnace according to claim 1, characterized in that: The heat exchange pipe (10) is wrapped around the outside of the storage silo (1), and the right side of the heat exchange pipe (10) is fixedly connected to the top left side of the water tank (14).

3. The heat recovery exchanger of a vertical tank magnesium smelting furnace according to claim 1, characterized in that: The discharge port (22) penetrates the bottom of the insulation board (8), and the heat exchange pipe (10) penetrates the left and right sides of the insulation board (8).

4. The waste heat recovery heat exchanger of a vertical tank magnesium smelting furnace according to claim 1, characterized in that: A second motor (13) is installed at the middle position of the top of the closed perforated plate (12). The output end of the second motor (13) is fixedly connected to a connecting shaft (19). The bottom end of the connecting shaft (19) is fixedly connected to a spiral conveying shaft (20). Stirring rods (18) are fixedly connected to the left and right sides of the connecting shaft (19). A cover plate (21) is provided at the bottom of the outside of the discharge port (22). A block (23) is fixedly connected to the top of the cover plate (21).

5. The heat recovery exchanger of a vertical tank magnesium smelting furnace according to claim 4, characterized in that: The block (23) is embedded at the bottom of the outlet (22), and the bottom of the screw conveyor shaft (20) is located inside the outlet (22).

6. The waste heat recovery heat exchanger for a vertical magnesia furnace according to claim 4, characterized in that: The stirring rods (18) are arranged on the left and right sides inside the storage bin (1), and there are multiple sets of stirring rods (18).

7. The heat recovery exchanger of a vertical tank magnesium smelting furnace according to claim 1, characterized in that: A frame (2) is provided on the left side of the bottom of the storage bin (1). A conveyor belt (4) is provided inside the frame (2). Rotary shafts (7) are movably connected to the left and right sides inside the frame (2). A drive wheel (6) is provided outside the rotating shaft (7). A first motor (3) is installed on the right side of the front end of the frame (2).

8. The waste heat recovery heat exchanger of a vertical tank magnesium smelting furnace according to claim 7, characterized in that: The drive wheel (6) is located on the left and right sides inside the conveyor belt (4). The drive wheel (6) and the conveyor belt (4) cooperate with each other. The output end of the first motor (3) is connected to the rotating shaft (7) through a coupling.

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