Preheater for recovering flue gas waste heat of metallurgical furnace

Abstract

The invention belongs to the technical field of metallurgical furnace flue gas waste heat recovery, and discloses a preheater for metallurgical furnace flue gas waste heat recovery, which comprises a first shell component and a second shell component, the first shell component is mounted on one side of the second shell component, and a heat exchange cavity is formed between the first shell component and the second shell component. A motor drives a screw rod to rotate, so that a moving plate drives a flue gas input pipe and a flue gas output pipe to move, the flue gas input pipe and the flue gas output pipe drive a heat exchange pipe to move, the heat exchange pipe moves relative to a second tank body, and the length of the heat exchange pipe extending into the second tank body is adjusted; and the situation that the heat of the flue gas in the heat exchange pipe is exhausted before being completely absorbed by the air or the heat of other flue gas is still adsorbed by the heat exchange pipe after the heat of the flue gas is completely absorbed by the air is avoided, and the flue gas heat recovery efficiency of the device is greatly improved.

Description

Technical Field

[0001] The invention belongs to the technical field of waste heat recovery of metallurgical furnaces, and in particular relates to a preheater for recovering waste heat of flue gas in metallurgical furnaces. Background Art

[0002] Metallurgical furnaces are industrial furnaces that perform heat treatment on various materials or workpieces during the metallurgical production process. Metallurgical furnaces will emit exhaust gas during production activities. Since the exhaust gas temperature is extremely high, if it is discharged directly, it will greatly waste thermal resources. If the heat is recovered and reused in the metallurgical furnace, it will not only recycle the heat, but also reduce the use cost of the metallurgical furnace.

[0003] The existing method of recovering flue gas is to discharge the high-temperature flue gas into the interior of the preheater, transfer the heat of the hot gas to the clean air through the heat exchange tube, increase the air temperature, and then pass the heated air into the metallurgical furnace to recover the heat. When the existing device recycles the heat of the flue gas, the length of the heat exchange tube passing into the interior of the device cannot be adjusted. The heat of the flue gas inside the heat exchange tube will be discharged before it is completely absorbed by the air, or the heat of the flue gas will still be in the heat exchange tube to absorb the heat of other flue gases after being completely absorbed by the air. The efficiency of the device in recovering the heat of the flue gas is low. Summary of the invention

[0004] The object of the present invention is to provide a preheater for recovering waste heat from flue gas in a metallurgical furnace, so as to solve the problem in the above background technology that the length of the heat exchange tube passing into the interior of the device cannot be adjusted.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a preheater for recovering waste heat from flue gas in a metallurgical furnace, comprising: a first shell component and a second shell component, the first shell component is installed on one side of the second shell component, and a heat exchange cavity is formed between the first shell component and the second shell component; a heat exchange component and a driving component, the driving component and the heat exchange component are both installed on the second shell component, one end of the heat exchange component extends into the heat exchange cavity, the driving component is used to drive the heat exchange component to reciprocate relative to the second shell component, so that the length of the heat exchange component extending into the heat exchange cavity is reduced or increased; the heat exchange component is used to connect a pipe for conveying flue gas, so that high-temperature flue gas enters the interior of the heat exchange component; an air guide component, the air guide component is installed in the heat exchange cavity, the air guide component is used to guide air into the heat exchange cavity, to exchange heat with the high-temperature flue gas in the heat exchange component, and then to be discharged from the air outlet end of the air guide component.

[0006] Preferably, the second shell component includes a second tank body; a second side cover is fixedly connected to one side of the second tank body; and a supporting foot is fixedly connected to the bottom of the second side cover.

[0007] Preferably, the heat exchange component includes a heat exchange tube; the heat exchange tube is installed inside the second tank body; a smoke inlet pipe and a smoke outlet pipe are fixedly connected to the second side cover; the outlet end of the smoke inlet pipe is fixedly connected to the inlet end of the heat exchange tube, and a first thermal insulation sleeve is provided on the smoke inlet pipe, and the smoke outlet pipe is fixedly connected to the outlet end of the heat exchange tube.

[0008] Preferably, the driving component includes a motor; the motor is fixedly connected to the inside of the second side cover, and the output end of the motor is connected to a screw; one end of the screw is fixedly connected to a limiting plate, and a movable plate is sleeved between the screw, the smoke output pipe and the smoke input pipe; a threaded groove matching the screw is provided inside the movable plate.

[0009] Preferably, a heat dissipation groove is provided on the outer side of the second side cover close to the motor; a porous plate is fixedly connected to the interior of the heat dissipation groove.

[0010] Preferably, the first shell component includes a first tank body; a first side cover is fixedly connected to the side of the first tank body opposite to the second tank body; a bottom rod is fixedly connected to the bottom of the first side cover; a moving wheel is rotatably connected to the bottom of the bottom rod; one side of the second tank body extends to the interior of the first tank body; and one side of the heat exchange tube is fixedly connected to the inner wall of the first tank body.

[0011] Preferably, a hydraulic cylinder is fixedly connected to the side of the first side cover opposite to the first tank body; a telescopic rod is installed at the telescopic end of the hydraulic cylinder; a bottom plate is fixedly connected to the bottom of the telescopic rod; and a rubber pad is bonded to the bottom of the bottom plate.

[0012] Preferably, the air guiding component comprises an air inlet pipe and an air outlet pipe; the air inlet pipe is fixedly connected to one side of the second tank body; the air outlet pipe is fixedly connected to one side of the first tank body, and a second thermal insulation sleeve is provided on the air outlet pipe.

[0013] Preferably, two annular grooves are symmetrically formed on the circumferential surface of the outer side of the second tank body; and a sealing ring is sleeved inside the annular groove.

[0014] Preferably, four guide grooves are provided in a circular array on one side of the outer side of the second tank body close to the annular groove; and four guide rods are fixedly connected to the inner wall of the first tank body in a circular array.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] (1) The present invention drives the screw to rotate through a motor, so that the movable plate drives the smoke inlet pipe and the smoke outlet pipe to move, so that the smoke inlet pipe and the smoke outlet pipe drive the heat exchange pipe to move, and the heat exchange pipe moves relative to the second tank body, so as to adjust the length of the heat exchange pipe extending into the second tank body, thereby preventing the heat of the smoke inside the heat exchange pipe from being discharged before being completely absorbed by the air, or preventing the heat of the smoke from being completely absorbed by the air while still absorbing the heat of other smoke in the heat exchange pipe, thereby greatly improving the efficiency of the device in recovering the heat of the smoke.

[0017] (2) On the basis of the above beneficial effects, when the heat exchange tube moves, when the present invention adjusts the position of the heat exchange tube, the heat exchange tube drives the first tank body to move synchronously, thereby adjusting the area of ​​the heat exchange cavity between the first tank body and the second tank body, so that the air can be more efficiently exchanged and the heat of the flue gas can be absorbed, thereby further improving the efficiency of the device in recovering the heat of the flue gas.

[0018] (3) On the basis of the above-mentioned beneficial effects, when the first tank body moves relative to the second tank body, the present invention cooperates with the guide rod and the guide groove to make the first tank body move more smoothly relative to the second tank body, so that the area of ​​the heat exchange cavity between the first tank body and the second tank body is easy to adjust, thereby further improving the efficiency of the device in recovering flue gas heat.

[0019] (4) On the basis of the above beneficial effects, after the first tank body is moved to the use point, the present invention drives the telescopic rod to move through the hydraulic cylinder, so that the telescopic rod drives the bottom plate to move, and the bottom plate contacts the ground, thereby lifting the moving wheels, so that the moving wheels are separated from the ground, making the first tank body more stable after being moved to the use point, making the device more stable during heat exchange, and further improving the efficiency of the device in recovering flue gas heat. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a front view of the present invention;

[0021] Figure 2 It is a front view of the telescopic rod of the present invention after being extended and retracted;

[0022] Figure 3 It is the internal structure diagram of the present invention;

[0023] Figure 4 This is a diagram of the internal structure of the first tank body after it is extended;

[0024] Figure 5 This is an appearance diagram of the second tank body of the present invention;

[0025] Figure 6 This is an appearance diagram of the first tank body of the present invention;

[0026] Figure 7 It is a side view of the first tank body of the present invention;

[0027] Figure 8 for Figure 3 Enlarged view of part A in the middle;

[0028] Fig. 9 for Figure 4 Enlarged view of middle part B;

[0029] In the figure: 1. rubber pad; 2. bottom plate; 3. telescopic rod; 4. hydraulic cylinder; 5. first side cover; 6. first tank body; 7. second tank body; 8. air inlet pipe; 9. second side cover; 10. first insulation sleeve; 11. smoke inlet pipe; 12. moving plate; 13. screw rod; 14. limit plate; 15. smoke outlet pipe; 16. supporting foot; 17. heat dissipation groove; 18. porous plate; 19. second insulation sleeve; 20. air outlet pipe; 21. moving wheel; 22. bottom rod; 23. annular groove; 24. sealing ring; 25. guide groove; 26. guide rod; 27. motor; 28. heat exchange tube. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] See also Figure 1-Figure 9 As shown, the present invention provides the following technical solutions:

[0032] Embodiment 1: A preheater for recovering waste heat from flue gas in a metallurgical furnace, comprising:

[0033] A first shell component and a second shell component, wherein the first shell component is installed on one side of the second shell component, and a heat exchange cavity is formed between the first shell component and the second shell component;

[0034] A heat exchange component and a driving component, wherein the driving component and the heat exchange component are both mounted on the second shell component, one end of the heat exchange component extends into the heat exchange cavity, and the driving component is used to drive the heat exchange component to reciprocate relative to the second shell component, so that the length of the heat exchange component extending into the heat exchange cavity is reduced or increased;

[0035] The heat exchange component is used to connect the pipe for conveying flue gas, so that the high-temperature flue gas enters the interior of the heat exchange component;

[0036] The air guide component is installed inside the heat exchange cavity. The air guide component is used to guide air into the heat exchange cavity to exchange heat with the high-temperature flue gas inside the heat exchange component, and then discharge it from the air outlet end of the air guide component.

[0037] Through the above technical scheme, the pipeline for conveying high-temperature flue gas is connected to the air inlet end of the heat exchange component, and the pipeline for conveying the cavity is connected to the air inlet end of the air guide component, and the high-temperature flue gas is input into the interior of the heat exchange component through the pipeline. After the high-temperature flue gas enters the interior of the heat exchange component, the air is input into the heat exchange cavity between the first shell component and the second shell component through the air guide component. After the air enters the interior of the heat exchange cavity, the high-temperature flue gas inside the heat exchange component exchanges heat with the air inside the heat exchange cavity, so that the heat of the flue gas is absorbed by the air, the air temperature is increased, and the flue gas temperature is reduced. The flue gas with reduced temperature is discharged through the air outlet end of the heat exchange component. After the air temperature rises, the air with increased temperature is discharged through the air guide component, and the air with increased temperature is input into the metallurgical furnace, so as to recover the heat of the flue gas. When it is necessary to adjust the length of the heat exchange component extending into the interior of the second shell component, the driving component works, thereby driving the heat exchange component to move, so that the length of the heat exchange component extending into the interior of the second shell component can be adjusted, so that the flue gas inside the heat exchange component can be easily heat exchanged with the air.

[0038] Embodiment 2: A preheater for recovering waste heat from flue gas in a metallurgical furnace, comprising:

[0039] A first shell component and a second shell component, wherein the first shell component is installed on one side of the second shell component, and a heat exchange cavity is formed between the first shell component and the second shell component;

[0040] A heat exchange component and a driving component, wherein the driving component and the heat exchange component are both mounted on the second shell component, one end of the heat exchange component extends into the heat exchange cavity, and the driving component is used to drive the heat exchange component to reciprocate relative to the second shell component, so that the length of the heat exchange component extending into the heat exchange cavity is reduced or increased;

[0041] The heat exchange component is used to connect the pipe for conveying flue gas, so that the high-temperature flue gas enters the interior of the heat exchange component;

[0042] An air guide component is installed inside the heat exchange cavity and is used to guide air into the heat exchange cavity to exchange heat with the high-temperature flue gas inside the heat exchange component and then discharge the air from the air outlet end of the air guide component;

[0043] The second housing member includes a second tank body 7;

[0044] A second side cover 9 is fixedly connected to one side of the second tank body 7;

[0045] A supporting foot 16 is fixedly connected to the bottom of the second side cover 9;

[0046] The heat exchange component includes a heat exchange tube 28;

[0047] The heat exchange tube 28 is installed inside the second tank 7;

[0048] The second side cover 9 is fixedly connected with a smoke inlet pipe 11 and a smoke outlet pipe 15;

[0049] The gas outlet end of the smoke inlet pipe 11 is fixedly connected to the gas inlet end of the heat exchange pipe 28 , and a first insulation sleeve 10 is sleeved on the smoke inlet pipe 11 , and the smoke outlet pipe 15 is fixedly connected to the gas outlet end of the heat exchange pipe 28 .

[0050] Through the above technical solution, the second side cover 9 is supported by the supporting feet 16, the pipe for conveying high-temperature flue gas is connected to the air inlet end of the flue gas inlet pipe 11, the pipe for conveying the cavity is connected to the air inlet end of the air guide component, the high-temperature flue gas is input into the flue gas inlet pipe 11 through the pipe, the high-temperature flue gas is input into the heat exchange tube 28 through the flue gas inlet pipe 11, after the high-temperature flue gas enters the heat exchange tube 28, the air is input into the heat exchange cavity between the first shell component and the second tank body 7 through the air guide component, after the air enters the heat exchange cavity, the high-temperature flue gas in the heat exchange tube 28 and the heat exchange cavity are The air is heat exchanged with the flue gas, so that the heat of the flue gas is absorbed by the air, the air temperature is increased, and the flue gas temperature is decreased. The flue gas with decreased temperature is discharged through the outlet end of the flue gas output pipe 15. After the air temperature rises, the air with increased temperature is discharged through the air guide component, so that the air with increased temperature is input into the metallurgical furnace, so as to recover the heat of the flue gas. When it is necessary to adjust the length of the heat exchange tube 28 extending into the interior of the second tank body 7, the driving component is operated, thereby driving the heat exchange tube 28 to move, so that the length of the heat exchange tube 28 extending into the interior of the second tank body 7 can be adjusted, so that the flue gas inside the heat exchange tube 28 can be easily heat exchanged with the air.

[0051] Embodiment 3: A preheater for recovering waste heat from flue gas in a metallurgical furnace, comprising:

[0052] A first shell component and a second shell component, wherein the first shell component is installed on one side of the second shell component, and a heat exchange cavity is formed between the first shell component and the second shell component;

[0053] A heat exchange component and a driving component, wherein the driving component and the heat exchange component are both mounted on the second shell component, one end of the heat exchange component extends into the heat exchange cavity, and the driving component is used to drive the heat exchange component to reciprocate relative to the second shell component, so that the length of the heat exchange component extending into the heat exchange cavity is reduced or increased;

[0054] The heat exchange component is used to connect the pipe for conveying flue gas, so that the high-temperature flue gas enters the interior of the heat exchange component;

[0055] An air guide component is installed inside the heat exchange cavity and is used to guide air into the heat exchange cavity to exchange heat with the high-temperature flue gas inside the heat exchange component and then discharge the air from the air outlet end of the air guide component;

[0056] The second housing member includes a second tank body 7;

[0057] A second side cover 9 is fixedly connected to one side of the second tank body 7;

[0058] A supporting foot 16 is fixedly connected to the bottom of the second side cover 9;

[0059] The heat exchange component includes a heat exchange tube 28;

[0060] The heat exchange tube 28 is installed inside the second tank 7;

[0061] The second side cover 9 is fixedly connected with a smoke inlet pipe 11 and a smoke outlet pipe 15;

[0062] The gas outlet end of the smoke inlet pipe 11 is fixedly connected to the gas inlet end of the heat exchange pipe 28, and the smoke inlet pipe 11 is covered with a first heat preservation sleeve 10, and the smoke outlet pipe 15 is fixedly connected to the gas outlet end of the heat exchange pipe 28;

[0063] The driving member includes a motor 27;

[0064] The motor 27 is fixedly connected to the inside of the second side cover 9, and the output end of the motor 27 is connected to the screw 13;

[0065] One end of the screw 13 is fixedly connected to a limiting plate 14, and a movable plate 12 is sleeved between the screw 13, the smoke output pipe 15 and the smoke input pipe 11;

[0066] The movable plate 12 has a thread groove inside that matches the screw 13;

[0067] A heat dissipation slot 17 is provided on the outer side of the second side cover 9 near the motor 27;

[0068] A porous plate 18 is fixedly connected inside the heat dissipation groove 17 .

[0069] Through the above technical scheme, the second side cover 9 is supported by the supporting feet 16, the pipe for conveying high-temperature flue gas is connected to the air inlet end of the flue gas input pipe 11, and the pipe of the conveying cavity is connected to the air inlet end of the air guide component, and the high-temperature flue gas is input into the flue gas input pipe 11 through the pipe, and the high-temperature flue gas is input into the heat exchange tube 28 through the flue gas input pipe 11. After the high-temperature flue gas enters the heat exchange tube 28, the air is input into the heat exchange cavity between the first shell component and the second tank body 7 through the air guide component. After the air enters the heat exchange cavity, the high-temperature flue gas inside the heat exchange tube 28 exchanges heat with the air inside the heat exchange cavity, so that the heat of the flue gas is absorbed by the air, the air temperature is increased, and the flue gas with reduced temperature passes through the flue gas cavity. The air is discharged from the air outlet end of the gas output pipe 15. After the air temperature rises, the air with the increased temperature is discharged through the air guide component, so that the air with the increased temperature is input into the metallurgical furnace, thereby recovering the heat of the flue gas. When it is necessary to adjust the length of the heat exchange tube 28 extending into the second tank body 7, the motor 27 works, so that the motor 27 drives the screw 13 to rotate, and through the thread groove, the movable plate 12 drives the flue gas output pipe 15 and the flue gas input pipe 11 to move, and the heat exchange tube 28 is driven to move through the flue gas output pipe 15 and the flue gas input pipe 11, so that the length of the heat exchange tube 28 extending into the second tank body 7 can be adjusted, so that the flue gas inside the heat exchange tube 28 can be easily heat-exchanged with the air, and when the motor 27 works, the heat dissipation groove 17 and the porous plate 18 cooperate to facilitate the heat dissipation of the motor 27.

[0070] Embodiment 4: A preheater for recovering waste heat from flue gas in a metallurgical furnace, comprising:

[0071] A first shell component and a second shell component, wherein the first shell component is installed on one side of the second shell component, and a heat exchange cavity is formed between the first shell component and the second shell component;

[0072] A heat exchange component and a driving component, wherein the driving component and the heat exchange component are both mounted on the second shell component, one end of the heat exchange component extends into the heat exchange cavity, and the driving component is used to drive the heat exchange component to reciprocate relative to the second shell component, so that the length of the heat exchange component extending into the heat exchange cavity is reduced or increased;

[0073] The heat exchange component is used to connect the pipe for conveying flue gas, so that the high-temperature flue gas enters the interior of the heat exchange component;

[0074] An air guide component is installed inside the heat exchange cavity and is used to guide air into the heat exchange cavity to exchange heat with the high-temperature flue gas inside the heat exchange component and then discharge the air from the air outlet end of the air guide component;

[0075] The second housing member includes a second tank body 7;

[0076] A second side cover 9 is fixedly connected to one side of the second tank body 7;

[0077] A supporting foot 16 is fixedly connected to the bottom of the second side cover 9;

[0078] The heat exchange component includes a heat exchange tube 28;

[0079] The heat exchange tube 28 is installed inside the second tank 7;

[0080] The second side cover 9 is fixedly connected with a smoke inlet pipe 11 and a smoke outlet pipe 15;

[0081] The gas outlet end of the smoke inlet pipe 11 is fixedly connected to the gas inlet end of the heat exchange pipe 28, and the smoke inlet pipe 11 is covered with a first heat preservation sleeve 10, and the smoke outlet pipe 15 is fixedly connected to the gas outlet end of the heat exchange pipe 28;

[0082] The first housing member includes a first tank body 6;

[0083] A first side cover 5 is fixedly connected to a side of the first tank body 6 opposite to the second tank body 7;

[0084] A bottom rod 22 is fixedly connected to the bottom of the first side cover 5;

[0085] The bottom of the bottom rod 22 is rotatably connected to a moving wheel 21;

[0086] One side of the second tank body 7 extends to the interior of the first tank body 6;

[0087] One side of the heat exchange tube 28 is fixedly connected to the inner wall of the first tank body 6;

[0088] A hydraulic cylinder 4 is fixedly connected to a side of the first side cover 5 opposite to the first tank body 6;

[0089] The telescopic end of the hydraulic cylinder 4 is equipped with a telescopic rod 3;

[0090] The bottom of the telescopic rod 3 is fixedly connected to the bottom plate 2;

[0091] A rubber pad 1 is bonded to the bottom of the bottom plate 2 .

[0092] Through the above technical scheme, the second side cover 9 is supported by the supporting feet 16, the first side cover 5 is supported by the bottom rod 22 and the moving wheel 21, and the first tank body 6 is supported by the first side cover 5. The pipe for conveying high-temperature flue gas is connected to the air inlet end of the flue gas inlet pipe 11, and the pipe of the conveying cavity is connected to the air inlet end of the air guide component. The high-temperature flue gas is input into the flue gas inlet pipe 11 through the pipe, and the high-temperature flue gas is input into the heat exchange tube 28 through the flue gas inlet pipe 11. After the high-temperature flue gas enters the heat exchange tube 28, the air is input into the heat exchange cavity between the first tank body 6 and the second tank body 7 through the air guide component. After the air enters the heat exchange cavity, the high-temperature flue gas in the heat exchange tube 28 exchanges heat with the air in the heat exchange cavity, so that the heat of the flue gas is absorbed by the air, the air temperature is increased, and the flue gas temperature is reduced. The flue gas after the temperature is reduced is discharged through the air outlet end of the smoke output pipe 15. After the air temperature rises, The air with increased temperature is discharged through the air guide component, and the air with increased temperature is input into the metallurgical furnace, so as to recover the heat of the flue gas. When it is necessary to adjust the length of the heat exchange tube 28 extending into the second tank body 7, the driving component works, thereby driving the heat exchange tube 28 to move, so that the length of the heat exchange tube 28 extending into the second tank body 7 can be adjusted, and when the heat exchange tube 28 moves, it will drive the first tank body 6 to move synchronously, so as to adjust the volume between the heat exchange cavities. When the first tank body 6 moves, it cooperates with the moving wheel 21 to make the first tank body 6 move more smoothly, so that the flue gas inside the heat exchange tube 28 can exchange heat with the air conveniently. When the first tank body 6 moves to the required position, the telescopic rod 3 is driven to move by the hydraulic cylinder 4, and the bottom plate 2 and the rubber pad 1 are driven to move by the telescopic rod 3. The bottom plate 2 and the rubber pad 1 contact the ground, thereby lifting the moving wheel 21, separating the moving wheel 21 from the ground, and making the first tank body 6 more stable after being moved to the use place.

[0093] Embodiment 5: A preheater for recovering waste heat from flue gas in a metallurgical furnace, comprising:

[0094] A first shell component and a second shell component, wherein the first shell component is installed on one side of the second shell component, and a heat exchange cavity is formed between the first shell component and the second shell component;

[0095] A heat exchange component and a driving component, wherein the driving component and the heat exchange component are both mounted on the second shell component, one end of the heat exchange component extends into the heat exchange cavity, and the driving component is used to drive the heat exchange component to reciprocate relative to the second shell component, so that the length of the heat exchange component extending into the heat exchange cavity is reduced or increased;

[0096] The heat exchange component is used to connect the pipe for conveying flue gas, so that the high-temperature flue gas enters the interior of the heat exchange component;

[0097] An air guide component is installed inside the heat exchange cavity and is used to guide air into the heat exchange cavity to exchange heat with the high-temperature flue gas inside the heat exchange component and then discharge the air from the air outlet end of the air guide component;

[0098] The second housing member includes a second tank body 7;

[0099] A second side cover 9 is fixedly connected to one side of the second tank body 7;

[0100] A supporting foot 16 is fixedly connected to the bottom of the second side cover 9;

[0101] The heat exchange component includes a heat exchange tube 28;

[0102] The heat exchange tube 28 is installed inside the second tank 7;

[0103] The second side cover 9 is fixedly connected with a smoke inlet pipe 11 and a smoke outlet pipe 15;

[0104] The gas outlet end of the smoke inlet pipe 11 is fixedly connected to the gas inlet end of the heat exchange pipe 28, and the smoke inlet pipe 11 is covered with a first heat preservation sleeve 10, and the smoke outlet pipe 15 is fixedly connected to the gas outlet end of the heat exchange pipe 28;

[0105] The first housing member includes a first tank body 6;

[0106] A first side cover 5 is fixedly connected to a side of the first tank body 6 opposite to the second tank body 7;

[0107] A bottom rod 22 is fixedly connected to the bottom of the first side cover 5;

[0108] The bottom of the bottom rod 22 is rotatably connected to a moving wheel 21;

[0109] One side of the second tank body 7 extends to the interior of the first tank body 6;

[0110] One side of the heat exchange tube 28 is fixedly connected to the inner wall of the first tank body 6;

[0111] The air guide member comprises an air inlet pipe 8 and an air outlet pipe 20;

[0112] The air inlet pipe 8 is fixedly connected to one side of the second tank body 7;

[0113] The air outlet pipe 20 is fixedly connected to one side of the first tank body 6, and a second heat-insulating sleeve 19 is sleeved on the air outlet pipe 20;

[0114] Two annular grooves 23 are symmetrically formed on the circumferential surface of the outer side of the second tank body 7;

[0115] A sealing ring 24 is sleeved inside the annular groove 23;

[0116] Four guide grooves 25 are provided in an annular array on one side of the outer side of the second tank body 7 close to the annular groove 23;

[0117] Four guide rods 26 are fixedly connected to the inner wall of the first tank body 6 in a circular array.

[0118] Through the above technical scheme, the second side cover 9 is supported by the supporting feet 16, the first side cover 5 is supported by the bottom rod 22 and the moving wheel 21, and the first tank body 6 is supported by the first side cover 5, the pipe for conveying high-temperature flue gas is connected to the air inlet end of the flue gas input pipe 11, the pipe for conveying the cavity is connected to the air inlet end of the air inlet pipe 8, and the pipe for conveying the air after the temperature is increased is connected to the air outlet pipe 20, and the high-temperature flue gas is input into the smoke input pipe 11 through the pipe, and the high-temperature flue gas is input into the heat exchange tube 28 through the smoke input pipe 11. After the high-temperature flue gas enters the heat exchange tube 28, the air is input into the heat exchange cavity between the first tank body 6 and the second tank body 7 through the air inlet pipe 8. After the air enters the heat exchange cavity, the high-temperature flue gas in the heat exchange tube 28 performs heat exchange with the air in the heat exchange cavity, so that the heat of the flue gas is absorbed by the air, the air temperature is increased, and the flue gas is heated. The air temperature is reduced, and the flue gas with reduced temperature is discharged through the air outlet end of the flue gas output pipe 15. After the air temperature rises, the air with increased temperature is discharged through the air outlet pipe 20, so that the air with increased temperature is input into the metallurgical furnace, thereby recovering the heat of the flue gas. When it is necessary to adjust the length of the heat exchange tube 28 extending into the second tank body 7, the driving component works, thereby driving the heat exchange tube 28 to move, so that the length of the heat exchange tube 28 extending into the second tank body 7 can be adjusted, and when the heat exchange tube 28 moves, it will drive the first tank body 6 to move synchronously, thereby adjusting the volume between the heat exchange cavities. When the first tank body 6 moves, the guide rod 26 and the guide groove 25 cooperate, and the moving wheel 21 cooperates, so that the first tank body 6 moves more smoothly, and the annular groove 23 and the sealing ring 24 increase the sealing between the first tank body 6 and the second tank body 7, so that the flue gas inside the heat exchange tube 28 is convenient for heat exchange with the air.

[0119] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0120] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A preheater for recovering waste heat from flue gas in a metallurgical furnace, characterized in that: include: A first shell component and a second shell component, wherein the first shell component is installed on one side of the second shell component, and a heat exchange cavity is formed between the first shell component and the second shell component; A heat exchange component and a driving component, wherein the driving component and the heat exchange component are both mounted on the second shell component, one end of the heat exchange component extends into the heat exchange cavity, and the driving component is used to drive the heat exchange component to reciprocate relative to the second shell component, so that the length of the heat exchange component extending into the heat exchange cavity is reduced or increased; The heat exchange component is used to connect the pipeline for conveying flue gas, so that the high-temperature flue gas enters the interior of the heat exchange component; An air guide component is installed inside the heat exchange cavity, and is used to guide air into the heat exchange cavity to exchange heat with the high-temperature flue gas inside the heat exchange component, and then discharge it from the air outlet end of the air guide component.

2. A preheater for recovering waste heat from flue gas in a metallurgical furnace according to claim 1, characterized in that: The second housing member comprises a second tank body (7); A second side cover (9) is fixedly connected to one side of the second tank body (7); A supporting foot (16) is fixedly connected to the bottom of the second side cover (9).

3. A preheater for recovering waste heat from flue gas in a metallurgical furnace according to claim 2, characterized in that: The heat exchange component comprises a heat exchange tube (28); The heat exchange tube (28) is installed inside the second tank (7); The second side cover (9) is fixedly connected with a smoke inlet pipe (11) and a smoke outlet pipe (15); The gas outlet end of the smoke inlet pipe (11) is fixedly connected to the gas inlet end of the heat exchange pipe (28), and a first heat insulation sleeve (10) is provided on the smoke inlet pipe (11), and the smoke outlet pipe (15) is fixedly connected to the gas outlet end of the heat exchange pipe (28).

4. A preheater for recovering waste heat from flue gas in a metallurgical furnace according to claim 3, characterized in that: The driving member comprises a motor (27); The motor (27) is fixedly connected to the inside of the second side cover (9), and the output end of the motor (27) is connected to a screw rod (13); One end of the screw rod (13) is fixedly connected to a limiting plate (14), and a movable plate (12) is sleeved between the screw rod (13), the smoke output pipe (15) and the smoke input pipe (11); A thread groove matching the screw rod (13) is provided inside the movable plate (12).

5. A preheater for recovering waste heat from flue gas in a metallurgical furnace according to claim 4, characterized in that: A heat dissipation groove (17) is provided on the outer side of the second side cover (9) near the motor (27); A porous plate (18) is fixedly connected inside the heat dissipation groove (17).

6. The preheater for recovering waste heat from flue gas in a metallurgical furnace according to claim 3, characterized in that: The first housing member comprises a first tank body (6); A first side cover (5) is fixedly connected to a side of the first tank body (6) opposite to the second tank body (7); A bottom rod (22) is fixedly connected to the bottom of the first side cover (5); The bottom of the bottom rod (22) is rotatably connected to a moving wheel (21); One side of the second tank body (7) extends to the interior of the first tank body (6); One side of the heat exchange tube (28) is fixedly connected to the inner wall of the first tank body (6).

7. A preheater for recovering waste heat from flue gas in a metallurgical furnace according to claim 6, characterized in that: A hydraulic cylinder (4) is fixedly connected to a side of the first side cover (5) opposite to the first tank body (6); A telescopic rod (3) is installed at the telescopic end of the hydraulic cylinder (4); The bottom of the telescopic rod (3) is fixedly connected to a bottom plate (2); A rubber pad (1) is bonded to the bottom of the base plate (2).

8. The preheater for recovering waste heat from flue gas in a metallurgical furnace according to claim 6, characterized in that: The air guide component comprises an air inlet pipe (8) and an air outlet pipe (20); The air inlet pipe (8) is fixedly connected to one side of the second tank body (7); The air outlet pipe (20) is fixedly connected to one side of the first tank body (6), and a second heat-insulating sleeve (19) is sleeved on the air outlet pipe (20).

9. A preheater for recovering waste heat from flue gas in a metallurgical furnace according to claim 8, characterized in that: Two annular grooves (23) are symmetrically formed on the circumferential surface of the outer side of the second tank body (7); A sealing ring (24) is sleeved inside the annular groove (23).

10. A preheater for recovering waste heat from flue gas in a metallurgical furnace according to claim 9, characterized in that: Four guide grooves (25) are provided in an annular array on one side of the outer side of the second tank body (7) close to the annular groove (23); Four guide rods (26) are fixedly connected to the inner wall of the first tank body (6) in a circular array.

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