A high-efficiency waste heat recovery and utilization device for converters

Abstract

This invention belongs to the field of converter waste heat recovery and utilization, and particularly relates to a high-efficiency converter waste heat recovery and utilization device, including a support plate. A furnace body is rotatably mounted on the upper part of the support plate. Two semi-annular heat insulation plates are arranged on the outer side of the furnace body. Multiple grooves are formed on the side of the semi-annular heat insulation plates away from the furnace body, and a first waste heat recovery mechanism is arranged in the grooves. An L-shaped plate is fixedly mounted on the upper right side of the support plate. During the steelmaking process using the furnace body, this invention can recover and utilize the heat emitted by the furnace body during operation and the high-temperature flue gas generated during steelmaking to preheat the scrap steel placed in the hopper. This makes it easier for the scrap steel to reach the required temperature in the subsequent steelmaking process, thus reducing energy consumption and production costs during steelmaking. Furthermore, the rotation of the furnace body during operation can drive the rotation of the hopper and rectangular tube, further improving the preheating effect on the scrap steel.

Description

Technical Field

[0001] This invention belongs to the field of converter waste heat recovery and utilization, and particularly relates to a high-efficiency converter waste heat recovery and utilization device. Background Technology

[0002] In the steel production process, the converter, as the core equipment in the steelmaking process, directly affects the production costs and environmental benefits of steel enterprises through its efficient operation and energy management. During operation, the converter generates a large amount of high-temperature waste heat, primarily from two sources: firstly, the high-temperature flue gas produced during steelmaking; and secondly, the converter lining, after prolonged exposure to the erosion of molten steel and slag, also absorbs and dissipates a significant amount of heat. This waste heat resource contains enormous energy and needs to be recovered and utilized.

[0003] Currently, the recovery of waste heat generated during converter operation is often limited to the direct recovery and utilization of flue gas waste heat and furnace lining waste heat, such as for power generation, heating combustion air, or preheating boiler feedwater. However, these recovered heat energy are not effectively transferred to the scrap steel that is about to enter the converter, thus requiring additional energy to heat the scrap steel during the steelmaking process, which increases the cost of steelmaking. Summary of the Invention

[0004] In view of the above problems, this application provides a converter waste heat recovery and utilization device, which can recover and utilize the heat generated during the use of the furnace body, and the recovered heat can be used to preheat the scrap steel used in steelmaking, which greatly reduces the cost consumed in steelmaking.

[0005] To achieve the above objectives, the present application provides the following technical solution: The present invention provides a converter waste heat high-efficiency recovery and utilization device, including a support plate, a furnace body rotatably mounted on the upper part of the support plate, two semi-annular heat insulation plates mounted on the outer side of the furnace body, a plurality of grooves being provided on the side of the semi-annular heat insulation plates away from the furnace body, a first waste heat recovery mechanism being provided in the grooves, an L-shaped plate being fixedly mounted on the upper right side of the support plate, two mounting plates symmetrically distributed front and back being provided on the lower side of the horizontal section of the L-shaped plate near the left side, the mounting plates being connected to the L-shaped plate by mounting bolts, a rotating rod being rotatably mounted on the mounting plate, and a hopper being fixedly mounted between the two rotating rods.

[0006] The first waste heat recovery mechanism includes a rectangular tube fixedly installed in the groove. Multiple first water inlet pipes are arranged in a linear array on the side of the rectangular tube away from the inner wall of the groove. A second water inlet pipe is installed at the lower end of the side of the rectangular tube away from the inner wall of the groove. A second water inlet pipe is fixedly installed at the bottom of the two semi-annular heat insulation plates. The bottom end of the second water inlet pipe is connected to the second water inlet pipe. A connecting pipe is installed on the outside of the second water inlet pipe.

[0007] The hopper has an insulation cavity inside its side wall and multiple air inlets communicating with the insulation cavity inside its interior. A second waste heat recovery mechanism is provided at the bottom of the hopper to work in conjunction with the air inlets.

[0008] According to an advantageous embodiment, the first waste heat recovery mechanism further includes a plurality of partition plates fixedly disposed within a rectangular tube in a linear array. The partition plates divide the interior of the rectangular tube into a plurality of water storage areas and an air intake area, and the plurality of water storage areas and the plurality of air intake areas are staggered from top to bottom. The two ends of the first water inlet pipe are respectively connected to two adjacent water storage areas, and the end of the second water inlet pipe away from the second water intake pipe is connected to the lowest water storage area. An air guide pipe is fixedly disposed between two adjacent partition plates, and the air guide pipe is connected to two adjacent air intake areas. The partition plate consists of an inclined plate and a flat plate located at the bottom of the inclined plate.

[0009] According to an advantageous embodiment, a drain pipe is fixedly installed inside the insulation cavity, and the end of the connecting pipe away from the second water inlet pipe is connected to the drain pipe. The end of the drain pipe away from the connecting pipe passes through the insulation cavity. A water guide pipe is connected to the upper part of the rectangular tube, and a first water inlet pipe is connected to the upper part of multiple water guide pipes. A water supply pipe is connected to one side of the first water inlet pipe.

[0010] According to an advantageous embodiment, a first electric push rod is fixedly installed on the upper side of the horizontal section of the L-shaped plate, and a fume hood is fixedly installed at the bottom end of the first electric push rod. The bottom of the fume hood is in contact with the upper part of the furnace body. An oxygen supply pipe is connected to the outer right side of the fume hood, and an air inlet pipe is connected to the outer left side of the fume hood. The end of the air inlet pipe away from the fume hood passes through the heat preservation cavity.

[0011] According to an advantageous embodiment, the second waste heat recovery mechanism includes an exhaust fan fixedly installed at the bottom of the hopper. An exhaust pipe is connected to the air inlet end of the exhaust fan, and the end of the exhaust pipe away from the exhaust fan penetrates the interior of the hopper. An exhaust pipe is connected to the air outlet end of the exhaust fan. An air intake pipe is fixedly installed at the bottom of two semi-annular heat insulation plates, and the end of the air outlet pipe away from the exhaust fan is connected to the air intake pipe. A plurality of first exhaust pipes are connected to the outside of the air intake pipe. The end of the first exhaust pipe away from the air intake pipe penetrates into the lowermost air inlet area. A second exhaust pipe is installed on the upper part of the side of the rectangular tube away from the inner wall of the groove, and one end of the second exhaust pipe penetrates into the uppermost air inlet area.

[0012] According to an advantageous embodiment, two mounting blocks are fixedly provided on each side of the two semi-annular heat insulation plates that are close to each other, and the corresponding two mounting blocks are connected by fastening bolts.

[0013] According to an advantageous embodiment, two connecting rods are hinged on the left side of the semi-annular heat insulation plate near the right side of the hopper, and the end of the connecting rod away from the semi-annular heat insulation plate is hinged to the outside of the hopper. Multiple vertical rods are fixedly installed inside the hopper.

[0014] According to an advantageous embodiment, a limiting port is provided on the rotating rod, and a limiting mechanism that cooperates with the limiting port is provided on the left side of the horizontal section of the L-shaped plate. The limiting mechanism includes a second electric push rod fixedly provided on the left side of the horizontal section of the L-shaped plate. A horizontal plate is fixedly provided at the bottom of the second electric push rod, and a limiting plate is fixedly provided at the bottom of the horizontal plate. The lower end of the limiting plate is inserted into the limiting port. Two guide rods that are symmetrically distributed on the left and right are provided on the upper part of the horizontal plate, and the top ends of the guide rods slide through the L-shaped plate.

[0015] According to an advantageous embodiment, a discharge plate is rotatably provided on the right side of the hopper, and hydraulic rods are hinged to the right ends of the front and rear outer side walls of the right side of the hopper, with the end of the hydraulic rod away from the hopper hinged to the discharge plate.

[0016] According to an advantageous embodiment, a feed hood is provided on the upper left side of the hopper, a sealing plate is rotatably provided on the upper part of the feed hood, a motor is fixedly provided on the front side of the feed hood, and the output shaft of the motor is connected to one side of the sealing plate.

[0017] Compared with the prior art, the converter waste heat recovery and utilization device provided in this embodiment of the invention has the following beneficial effects:

[0018] 1. In the process of steelmaking using a furnace, the present invention can recover and utilize the heat emitted by the furnace during operation and the high-temperature flue gas generated during steelmaking to preheat the scrap steel placed in the hopper, making it easier for the scrap steel to reach the required temperature in the subsequent steelmaking process, thereby reducing energy consumption and production costs during steelmaking. At the same time, the rotation of the furnace itself during operation can drive the hopper and rectangular tube to rotate, which further improves the preheating effect on the scrap steel.

[0019] 2. The present invention is provided with a first waste heat recovery mechanism, a water storage area and a drain pipe. During the operation of the furnace, the heat emitted by the furnace during operation can be transferred to the water in the water storage area through the rectangular pipe, so that the water temperature gradually rises. The water entering the drain pipe can heat the hopper, so that the inside of the hopper can maintain a certain temperature. This allows the scrap steel placed in the hopper to be preheated before use, thereby reducing energy consumption.

[0020] 3. The present invention is equipped with a second waste heat recovery mechanism, an air inlet zone, and a second exhaust pipe. During the operation of the furnace, high-temperature flue gas can be introduced into the interior of the hopper, thereby reheating the scrap steel in the hopper and improving the preheating effect of the scrap steel. At the same time, the flue gas used for preheating the scrap steel can continue to be introduced into the air inlet zone. The residual heat in the flue gas can be used to heat the water in the water storage zone, thereby further ensuring the heating effect of the hopper and further improving the preheating effect of the scrap steel.

[0021] 4. In this invention, the limiting mechanism and connecting rod allow the hopper to rotate synchronously during the operation of the furnace body. The rotation of the hopper causes the scrap steel inside to move, resulting in better contact between the flue gas and the scrap steel after it enters the hopper, thus improving the preheating effect on the scrap steel. Furthermore, the shaking of the furnace body also causes the water in the water storage area to shake. The shaking water can absorb the heat of the furnace body more quickly and absorb more heat to ensure full utilization of heat, further improving the waste heat recovery and utilization effect. Attached Figure Description

[0022] Figure 1 This is a structural diagram of the present invention.

[0023] Figure 2 This is a diagram showing the connection structure of the two semi-annular heat insulation plates in this invention.

[0024] Figure 3 This is a structural diagram showing the connection between the two semi-annular heat insulation plates and the first waste heat recovery mechanism in this invention.

[0025] Figure 4 This is a cross-sectional view of the rectangular tube in this invention.

[0026] Figure 5 This is a diagram showing the connection structure between the rectangular tube and the partition plate in this invention.

[0027] Figure 6 This is a diagram showing the connection structure between the connecting pipe and the drainage pipe in this invention.

[0028] Figure 7 This is a structural diagram of the hopper in this invention.

[0029] Figure 8 This is a cross-sectional view of the hopper in this invention.

[0030] Figure 9 This is a structural diagram of the second waste heat recovery mechanism in this invention.

[0031] Figure 10 This is a structural diagram of the fume hood in this invention.

[0032] Figure 11This is an exploded view of the connection structure between the limiting mechanism and the rotating rod in this invention.

[0033] Figure 12 This is a diagram showing the state of scrap steel being poured into the furnace body from the hopper of this invention.

[0034] The attached diagram shows the following reference numerals: 1. Support plate; 2. Furnace body; 3. Semi-circular heat insulation plate; 4. Groove; 5. First waste heat recovery mechanism; 501. Rectangular tube; 502. First water inlet pipe; 503. Second water inlet pipe; 504. Second water inlet pipe; 505. Connecting pipe; 506. Partition plate; 5061. Inclined plate; 5062. Flat plate; 6. Insulation cavity; 7. Air inlet; 8. Second waste heat recovery mechanism; 801. Exhaust fan; 802. Exhaust pipe; 803. Exhaust pipe; 804. Air inlet pipe; 805. First exhaust pipe; 9. Water storage area; 10. Air inlet area; 11. 12. Air guide pipe; 13. Drain pipe; 14. First electric actuator; 15. Fume hood; 16. Oxygen supply pipe; 17. Air inlet pipe; 18. Second exhaust pipe; 19. Mounting block; 20. Connecting rod; 21. Vertical rod; 22. Limiting port; 22. Limiting mechanism; 221. Second electric actuator; 222. Horizontal plate; 223. Limiting plate; 224. Guide rod; 23. Feeding plate; 24. Hydraulic rod; 25. Feed hood; 26. Sealing plate; 27. L-shaped plate; 28. Mounting plate; 29. ​​Rotating rod; 30. Hopper; 31. Water guide pipe; 32. First water inlet pipe; 33. Water supply pipe. Detailed Implementation

[0035] The following is in conjunction with the appendix Figure 1-12 This application will be described in further detail.

[0036] Please refer to the following: Figure 1 , Figure 2 , Figure 7 and Figure 8 A high-efficiency waste heat recovery and utilization device for converters includes a support plate 1. A furnace body 2 is rotatably mounted on the upper part of the support plate 1. Two semi-annular heat insulation plates 3 are arranged on the outer side of the furnace body 2. Multiple grooves 4 are formed on the side of the semi-annular heat insulation plates 3 away from the furnace body 2. A first waste heat recovery mechanism 5 is arranged in the grooves 4. An L-shaped plate 27 is fixedly mounted on the upper right side of the support plate 1. Two mounting plates 28 are symmetrically distributed front and back on the lower side of the horizontal section of the L-shaped plate 27, near the left side. The mounting plates 28 are connected to the L-shaped plate 27 by mounting bolts. A rotating rod 29 is rotatably mounted on each mounting plate 28. A hopper 30 is fixedly mounted between the two rotating rods 29. A heat insulation cavity 6 is formed inside the side wall of the hopper 30, and multiple air inlets 7 communicating with the heat insulation cavity 6 are formed inside the hopper 30. A second waste heat recovery mechanism 8 is arranged at the bottom of the hopper 30 to cooperate with the air inlets 7.

[0037] See Figure 2Two mounting blocks 18 are fixedly installed on the side of each of the two semi-annular heat insulation plates 3 that are close to each other, and the two mounting blocks 18 are connected by fastening bolts.

[0038] When recovering and utilizing the waste heat generated during the operation of the furnace body 2, the hopper 30 is first installed on the L-shaped plate 27 using mounting bolts, and then the two semi-annular heat insulation plates 3 are installed on the outside of the furnace body 2 using fastening bolts, so that the waste heat can be recovered and utilized subsequently.

[0039] See Figure 1 and Figure 7 A feed hood 25 is provided on the upper left side of the hopper 30. A sealing plate 26 is rotatably provided on the upper part of the feed hood 25. A motor is fixedly provided on the front side of the feed hood 25, and the output shaft of the motor is connected to one side of the sealing plate 26.

[0040] To facilitate the addition of scrap steel into the hopper 30, after the semi-annular heat insulation plate 3 and the hopper 30 are installed, the motor can drive the sealing plate 26 to rotate, so that the sealing plate 26 no longer blocks the feed hood 25. Then the scrap steel is poured into the hopper 30 through the feed hood 25. The motor is then used to make the sealing plate 26 continue to block the feed hood 25. During steelmaking, the scrap steel in the hopper 30 can be directly poured into the furnace body 2 for steelmaking.

[0041] See Figure 3 , Figure 4 , Figure 6 and Figure 8 The first waste heat recovery mechanism 5 includes a rectangular tube 501 fixedly installed in the groove 4. A water guide pipe 31 is connected to the upper part of the rectangular tube 501. A first water inlet pipe 32 is connected to the upper part of multiple water guide pipes 31. A water supply pipe 33 is connected to one side of the first water inlet pipe 32. Multiple first water inlet pipes 502 arranged in a linear array are provided on the side of the rectangular tube 501 away from the inner wall of the groove 4. The outlet of the previous first water inlet pipe 502 is lower than the inlet of the next first water inlet pipe 502. A second water inlet pipe 503 is provided at the lower end of the side of the rectangular tube 501 away from the inner wall of the groove 4. A second water inlet pipe 504 is provided at the bottom of the two semi-annular heat insulation plates 3. The second water inlet pipe 504 is a ring structure that is not connected end to end. The bottom end of the second water inlet pipe 503 is connected to the second water inlet pipe 504. A connecting pipe 505 is connected to the outside of the second water inlet pipe 504. A drain pipe 12 is fixedly installed inside the insulation cavity 6. The end of the connecting pipe 505 away from the second water inlet pipe 504 is connected to the drain pipe 12, and the end of the drain pipe 12 away from the connecting pipe 505 passes through the insulation cavity 6.

[0042] See Figure 5The first waste heat recovery mechanism 5 also includes a plurality of partition plates 506 fixedly arranged in a linear array inside the rectangular tube 501. The partition plates 506 divide the interior of the rectangular tube 501 into a plurality of water storage areas 9 and an air intake area 10, and the plurality of water storage areas 9 and the plurality of air intake areas 10 are staggered from top to bottom. The two ends of the first water inlet pipe 502 are respectively connected to two adjacent water storage areas 9. The end of the second water inlet pipe 503 away from the second water inlet pipe 504 is connected to the lowest water storage area 9. An air guide pipe 11 is fixedly arranged between two adjacent partition plates 506, and the air guide pipe 11 is connected to two adjacent air intake areas 10. The partition plate 506 is composed of an inclined plate 5061 and a flat plate 5062 located at the bottom of the inclined plate 5061.

[0043] To recover and utilize the heat emitted by the furnace 2 during operation, external water is introduced into the water supply pipe 33. After entering the water supply pipe 33, the water sequentially flows into the first inlet pipe 32 and the guide pipe 31. Then, the water in the guide pipe 31 flows through multiple first water inlets 502 into various water storage areas 9, gradually flowing downwards from the uppermost water storage area 9 until it reaches the lowermost water storage area 9. At this point, the water storage areas 9 are not full. In each water storage area 9, the water absorbs the heat transferred from the furnace 2 through the rectangular pipe 501, causing the water temperature to gradually rise. Then, the water flows into the lowermost water storage area 9 and through the second water inlet pipe... Water 503 enters the second water inlet pipe 504, and then the water enters the drain pipe 12 through the connecting pipe 505. During the process of water entering the drain pipe 12 from the water supply pipe 33, the heat emitted by the furnace body 2 during operation is transferred to the water in the water storage area 9 through the rectangular pipe 501, causing the water temperature to gradually rise. Thus, the water entering the drain pipe 12 can heat the hopper 30, keeping the inside of the hopper 30 at a certain temperature. This allows the scrap steel placed in the hopper 30 to be preheated before use, reducing energy consumption. Furthermore, the heat emitted by the furnace body 2 during operation can be recovered and utilized. Finally, the warm water discharged from the drain pipe 12 can be used elsewhere for full utilization.

[0044] See Figure 1 and Figure 10 A first electric push rod 13 is fixedly installed on the upper side of the horizontal section of the L-shaped plate 27. A fume hood 14 is fixedly installed at the bottom end of the first electric push rod 13. The bottom of the fume hood 14 is in contact with the upper part of the furnace body 2. An oxygen supply pipe 15 is connected to the right side of the fume hood 14. An air inlet pipe 16 is connected to the left side of the fume hood 14. The end of the air inlet pipe 16 away from the fume hood 14 passes through the heat preservation cavity 6.

[0045] In order to recover and utilize the heat in the flue gas generated during steelmaking, the flue gas generated during steelmaking enters the fume hood 14, and then the flue gas in the fume hood 14 enters the insulation chamber 6 through the air inlet pipe 16. The flue gas entering the insulation chamber 6 enters the interior of the hopper 30 through the air inlet 7. Thus, the high-temperature flue gas can be used to further preheat the scrap steel in the hopper 30, thereby recovering and utilizing the heat in the flue gas generated during steelmaking. The preheated scrap steel is more likely to reach the required temperature in the subsequent steelmaking process, thus reducing energy consumption and production costs during steelmaking.

[0046] See Figure 1 , Figure 3 , Figure 4 and Figure 9 The second waste heat recovery mechanism 8 includes an exhaust fan 801 fixedly installed at the bottom of the hopper 30. An exhaust pipe 802 is connected to the air inlet end of the exhaust fan 801. The end of the exhaust pipe 802 away from the exhaust fan 801 passes through the interior of the hopper 30. An exhaust pipe 803 is connected to the air outlet end of the exhaust fan 801. An air intake pipe 804 is fixedly installed at the bottom of the two semi-annular heat insulation plates 3. The end of the air outlet pipe 803 away from the exhaust fan 801 is connected to the air intake pipe 804. A plurality of first exhaust pipes 805 are connected to the outside of the air intake pipe 804. The end of the first exhaust pipe 805 away from the air intake pipe 804 passes through the lowermost air intake area 10. A second exhaust pipe 17 is installed on the upper part of the side of the rectangular tube 501 away from the inner wall of the groove 4. One end of the second exhaust pipe 17 passes through the uppermost air intake area 10.

[0047] In order to reuse the flue gas after preheating scrap steel, the exhaust fan 801 extracts the flue gas from the hopper 30 after preheating scrap steel through the exhaust pipe 802. The flue gas enters the exhaust pipe 803 through the exhaust pipe 802, and then enters the lowermost air intake zone 10 through the intake pipe 804 and the first exhaust pipe 805. Then, through the guide pipe 11, the flue gas can enter each air intake zone 10 from bottom to top, so that the residual heat in the flue gas can be utilized more effectively. Finally, the flue gas is discharged from the uppermost air intake zone 10 through the second exhaust pipe 17. The residual heat in the flue gas can be used to heat or keep the water in the water storage zone 9, thereby further ensuring the heating effect of the hopper 30 and improving the preheating effect of the scrap steel.

[0048] See Figure 1 , Figure 7 and Figure 11A limiting port 21 is provided on the rotating rod 29. A limiting mechanism 22 that works with the limiting port 21 is provided on the left side of the horizontal section of the L-shaped plate 27. The limiting mechanism 22 includes a second electric push rod 221 fixedly provided on the left side of the horizontal section of the L-shaped plate 27. A horizontal plate 222 is fixedly provided at the bottom of the second electric push rod 221. A limiting plate 223 is fixedly provided at the bottom of the horizontal plate 222. The lower end of the limiting plate 223 is inserted into the limiting port 21. Two guide rods 224 that are symmetrically distributed on the left and right are provided on the upper part of the horizontal plate 222. The top end of the guide rod 224 slides through the L-shaped plate 27.

[0049] See Figure 8 and Figure 12 Two connecting rods 19 are hinged on the left side of the semi-annular heat insulation plate 3 near the right side of the hopper 30. The end of the connecting rod 19 away from the semi-annular heat insulation plate 3 is hinged to the outside of the hopper 30. Multiple vertical rods 20 are fixedly installed inside the hopper 30.

[0050] To further improve the preheating effect of scrap steel in hopper 30, during the steelmaking process using furnace body 2, the furnace body 2 rotates while adding scrap steel and pouring molten iron. It also rotates when emptying slag and molten steel after smelting. Before the furnace body 2 needs to rotate, the first electric push rod 13 moves the fume hood 14 upwards, ensuring it doesn't interfere with the rotation. Then, the second electric push rod 221 moves the horizontal plate 222 upwards. This upward movement of the horizontal plate 222 causes the limiting plate 223 to move out of the limiting port 21, thus eliminating the limitation on the rotating rod 29. When the furnace body 2 rotates, the connecting rod 19 drives the hopper 30 to rotate. The rotation of the hopper 30 moves the scrap steel inside, and the scrap steel also moves after contacting and colliding with the vertical rod 20. This improves the contact effect between the flue gas entering the hopper 30 and the scrap steel, resulting in better preheating of the scrap steel.

[0051] Secondly, during the rotation of the furnace body 2, the water in the water storage area 9 will also be shaken. The shaking water can absorb the heat of the furnace body 2 more quickly and absorb more heat to ensure full utilization of the heat. After the furnace body 2 stops rotating and returns to the initial position, the second electric push rod 221 will work to re-insert the limit plate 223 into the limit port 21 to ensure the stability of the hopper 30.

[0052] See Figure 7 and Figure 12 A discharge plate 23 is rotatably mounted on the right side of the hopper 30. Hydraulic rods 24 are hinged to the right ends of the front and rear outer walls of the hopper 30. The end of the hydraulic rod 24 away from the hopper 30 is hinged to the discharge plate 23.

[0053] To facilitate the pouring of scrap steel from hopper 30 into furnace body 2, when furnace body 2 rotates to the left, connecting rod 19 causes hopper 30 to rotate to the right. When furnace body 2 rotates to the left to a suitable angle, hydraulic rod 24 drives the discharge plate 23 to rotate. At this time, the bottom of discharge plate 23 will rest on the upper part of furnace body 2, and the scrap steel in hopper 30 can enter furnace body 2 through discharge plate 23, making it convenient for steelmaking.

[0054] In practice, the hopper 30 is first installed on the L-shaped plate 27, and then the semi-annular heat insulation plate 3 is installed on the furnace body 2. At this time, scrap steel is added into the hopper 30. Then, during the steelmaking process in the furnace body 2, water is supplied to the water supply pipe 33. As the water enters the drain pipe 12 from the water supply pipe 33, the heat emitted by the furnace body 2 during operation is transferred to the water in the water storage area 9 through the rectangular pipe 501, causing the water temperature to gradually rise. Thus, the water entering the drain pipe 12 can heat the hopper 30, keeping the inside of the hopper 30 at a certain temperature, which can preheat the scrap steel placed in the hopper 30 before use.

[0055] Meanwhile, the flue gas generated during steelmaking enters the fume hood 14, and then the flue gas in the fume hood 14 enters the interior of the hopper 30 through the air inlet 7. The high-temperature flue gas can be used to further preheat the scrap steel in the hopper 30, thereby recovering and utilizing the heat in the flue gas generated during steelmaking. The preheated scrap steel is more likely to reach the required temperature in the subsequent steelmaking process, which reduces the energy consumption and production cost during steelmaking. Moreover, the flue gas used for preheating scrap steel can be reused, further ensuring the preheating effect of scrap steel.

[0056] Furthermore, during the steelmaking process, the rotation of the furnace body 2 also drives the hopper 30 to rotate, which allows the scrap steel in the hopper 30 to move, resulting in better contact between the flue gas and the scrap steel after entering the hopper 30, thus improving the preheating effect on the scrap steel. Secondly, the rotation of the furnace body 2 also causes the water in the water storage area 9 to slosh around. The sloshing water can absorb the heat of the furnace body 2 more quickly and absorb more heat to ensure full utilization of the heat.

[0057] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A high-efficiency waste heat recovery and utilization device for converters, comprising a support plate, characterized in that: The upper part of the support plate is rotatably equipped with a furnace body. Two semi-annular heat insulation plates are provided on the outer side of the furnace body. Multiple grooves are opened on the side of the semi-annular heat insulation plates away from the furnace body. A first waste heat recovery mechanism is provided in the grooves. An L-shaped plate is fixedly installed on the upper right side of the support plate. Two mounting plates are symmetrically distributed front and back on the lower side of the horizontal section of the L-shaped plate and near the left side. The mounting plates are connected to the L-shaped plate by mounting bolts. A rotating rod is rotatably installed on the mounting plate. A hopper is fixedly installed between the two rotating rods. The first waste heat recovery mechanism includes a rectangular tube fixedly installed in the groove. Multiple first water inlet pipes are arranged in a linear array on the side of the rectangular tube away from the inner wall of the groove. A second water inlet pipe is installed at the lower end of the side of the rectangular tube away from the inner wall of the groove. A second water inlet pipe is fixedly installed at the bottom of the two semi-annular heat insulation plates. The bottom end of the second water inlet pipe is connected to the second water inlet pipe. A connecting pipe is connected to the outside of the second water inlet pipe. The hopper has an insulation cavity inside its side wall and multiple air inlets communicating with the insulation cavity inside its interior. The bottom of the hopper is equipped with a second waste heat recovery mechanism that works in conjunction with the air inlets. The first waste heat recovery mechanism also includes multiple partition plates fixedly arranged in a linear array inside a rectangular tube. The multiple partition plates divide the interior of the rectangular tube into multiple water storage areas and multiple air intake areas, and the multiple water storage areas and multiple air intake areas are staggered from top to bottom. The two ends of the first water inlet pipe are respectively connected to two adjacent water storage areas, and the end of the second water inlet pipe away from the second water intake pipe is connected to the lowest water storage area. An air guide pipe is fixedly arranged between two adjacent partition plates, and the air guide pipe is connected to two adjacent air intake areas. The second waste heat recovery mechanism includes an exhaust fan fixedly installed at the bottom of the hopper. An exhaust pipe is connected to the air inlet end of the exhaust fan. The end of the exhaust pipe away from the exhaust fan passes through the interior of the hopper. An exhaust pipe is connected to the air outlet end of the exhaust fan. An air intake pipe is fixedly installed at the bottom of the two semi-annular heat insulation plates. The end of the air outlet pipe away from the exhaust fan is connected to the air intake pipe. Multiple first exhaust pipes are connected to the outside of the air intake pipe. The end of the first exhaust pipe away from the air intake pipe passes through the lowest air inlet area. A second exhaust pipe is installed on the upper part of the side of the rectangular tube away from the inner wall of the groove. One end of the second exhaust pipe passes through the highest air inlet area.

2. The converter waste heat high-efficiency recovery and utilization device according to claim 1, characterized in that, The partition consists of an inclined plate and a flat plate located at the bottom of the inclined plate.

3. The converter waste heat high-efficiency recovery and utilization device according to claim 1, characterized in that, A drain pipe is fixedly installed inside the insulation cavity. The end of the connecting pipe away from the second water inlet pipe is connected to the drain pipe. The end of the drain pipe away from the connecting pipe passes through the insulation cavity. A water guide pipe is connected to the upper part of the rectangular tube. The upper parts of multiple water guide pipes are connected to the first water inlet pipe. A water supply pipe is connected to one side of the first water inlet pipe.

4. The converter waste heat high-efficiency recovery and utilization device according to claim 1, characterized in that, A first electric push rod is fixedly installed on the upper side of the horizontal section of the L-shaped plate. A fume hood is fixedly installed at the bottom end of the first electric push rod. The bottom of the fume hood is in contact with the upper part of the furnace body. An oxygen supply pipe is connected to the outer right side of the fume hood, and an air inlet pipe is connected to the outer left side of the fume hood. The end of the air inlet pipe away from the fume hood passes through the heat preservation cavity.

5. The converter waste heat high-efficiency recovery and utilization device according to claim 1, characterized in that, Two mounting blocks are fixedly installed on the side of each of the two semi-annular heat insulation plates that are close to each other, and the corresponding two mounting blocks are connected by fastening bolts.

6. The converter waste heat high-efficiency recovery and utilization device according to claim 1, characterized in that, Two connecting rods are hinged on the left side of the semi-annular heat insulation plate near the right side of the hopper. The end of the connecting rod away from the semi-annular heat insulation plate is hinged to the outside of the hopper. Multiple vertical rods are fixedly installed inside the hopper.

7. The converter waste heat high-efficiency recovery and utilization device according to claim 1, characterized in that, A limiting port is provided on the rotating rod. A limiting mechanism that works in conjunction with the limiting port is provided on the left side of the horizontal section of the L-shaped plate. The limiting mechanism includes a second electric push rod fixedly provided on the left side of the horizontal section of the L-shaped plate. A horizontal plate is fixedly provided at the bottom of the second electric push rod. A limiting plate is fixedly provided at the bottom of the horizontal plate. The lower end of the limiting plate is inserted into the limiting port. Two guide rods are provided on the upper part of the horizontal plate, which are symmetrically distributed on the left and right. The top ends of the guide rods slide through the L-shaped plate.

8. The converter waste heat high-efficiency recovery and utilization device according to claim 1, characterized in that, A discharge plate is rotatably mounted on the right side of the hopper. Hydraulic rods are hinged to the right ends of the front and rear outer walls of the right side of the hopper. The end of the hydraulic rod furthest from the hopper is hinged to the discharge plate.

9. The converter waste heat high-efficiency recovery and utilization device according to claim 1, characterized in that, A feeding hood is provided on the upper left side of the hopper, and a sealing plate is rotatably provided on the upper part of the feeding hood. A motor is fixedly provided on the front side of the feeding hood, and the output shaft of the motor is connected to one side of the sealing plate.

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