Flue gas waste heat recovery device for smelting furnace

Abstract

The flue gas waste heat recovery device comprises a water storage tank, a heat exchange pipe and a heat exchange box, the two ends of the bottom face of the water storage tank are fixedly connected with supporting legs respectively, the bottom ends of the supporting legs are fixedly connected with a base, the bottom face of the heat exchange box is fixedly connected with a plurality of supporting columns, and the bottom faces of the supporting columns are fixedly connected with the base. When a heat exchange pipe needs to be replaced and maintained, the box cover is detached, a driving motor can drive a moving block, a connecting pipe, a first connecting annular plate, a second rubber pad and the like to move, a corrugated rubber hose is compressed, the second rubber pad is separated from a second connecting annular plate and the heat exchange pipe, and the heat exchange pipe is replaced and maintained. And then the lifting block, the supporting block, the heat exchange tube and the like can be driven to move upwards to proper positions through the driving air cylinder, the heat exchange tube and the supporting block can be disassembled for maintenance or replacement, and the heat exchange tube is convenient to disassemble and assemble and convenient to maintain or replace.

Description

Technical Field

[0001] The invention relates to the technical field of flue gas waste heat recovery, and in particular to a smelting furnace flue gas waste heat recovery device. Background Art

[0002] Ferronickel is used as an alloying element additive in the steelmaking industry to improve the bending strength and hardness of steel, and can make the structure of cast iron uniform and increase the density. It can also be used as an additive for nickel-containing or nickel-chromium-containing cast iron rolls and other casting alloys. During processing, a nickel-ferroni smelting furnace is required to melt it. A large amount of flue gas will be generated during the processing, and the heat will be directly discharged and cannot be fully utilized. The recovery and utilization of flue gas waste heat has become a hot topic.

[0003] For example, the Chinese utility model patent with the authorization announcement number CN209840143U discloses a boiler waste heat recovery device, including a boiler body, a flue gas exhaust pipe is arranged on the boiler body, a flue gas waste heat recovery device is fixedly installed on the flue gas exhaust pipe, the flue gas waste heat recovery device includes an air inlet and an air outlet, a heat exchange tube is arranged in the flue gas waste heat recovery device, the input end of the heat exchange tube is connected to a low-temperature liquid tube, and the output end of the heat exchange tube is connected to a high-temperature liquid tube. This device is used to recycle the waste heat in the flue gas discharged from the boiler, and use the high-temperature waste heat of the flue gas to heat low-temperature water, etc. The flue gas discharged from the boiler body reaches the flue gas waste heat recovery device through the flue gas exhaust pipe, and the low-temperature liquid pipe guides the cold water into the heat exchange tube in the flue gas waste heat recovery device, and then the waste heat in the flue gas is converted and transferred to the cold water in the heat exchange tube through the heat exchange tube, and the cold water is heated and discharged from the high-temperature liquid tube, and stored in the insulated water bucket waiting for use. This device is widely used and highly practical.

[0004] However, the existing smelting furnace flue gas waste heat recovery device has a heat exchange tube arranged in the flue gas waste heat recovery device, and the waste heat in the flue gas is converted and transferred to the cold water in the heat exchange tube through the heat exchange tube to recover the flue gas waste heat. The heat exchange tube is arranged in the flue gas waste heat recovery device, which is not convenient for disassembly and replacement and maintenance of the heat exchange tube.

[0005] To this end, we propose a smelting furnace flue gas waste heat recovery device to solve the above problems. Summary of the invention

[0006] The object of the present invention is to provide a smelting furnace flue gas waste heat recovery device to solve the problems raised in the above background technology.

[0007] To achieve the above object, the present invention provides the following technical solution: A smelting furnace flue gas waste heat recovery device, including a water storage tank, a heat exchange tube, and a heat exchange box. Both ends of the bottom surface of the water storage tank are fixedly connected with support legs, and the bottom ends of the support legs are fixedly connected with a base. A plurality of support columns are fixedly connected to the bottom surface of the heat exchange box, and the bottom ends of the support columns are fixedly connected with the base. The top surface of the heat exchange box contacts a rubber pad four, and a box cover is fixedly arranged on the top surface of the rubber pad four. One side of the bottom of the water storage tank is fixedly connected with a support seat, a pump body one is fixedly installed on the top of the support seat, a water suction pipe is fixedly installed at the input end of the pump body one, and a delivery pipe is fixedly installed at the output end of the pump body one. A pump body two is fixedly installed on the top of the water storage tank, a recovery pipe is fixedly installed at the input end of the pump body two, one ends of the delivery pipe and the recovery pipe are respectively fixedly connected with one end of a corrugated rubber hose, and the other end of the corrugated rubber hose is fixedly connected with one end of a connecting pipe. An annular connecting plate one is fixedly connected to the outer surface of the other end of the connecting pipe, and a rubber pad two is fixedly arranged on one side of the annular connecting plate one and the connecting pipe;

[0008] Both ends of the bottom surface of the heat exchange box are respectively fixedly installed with cylinders, the output end of the piston rod of the cylinder is fixedly connected with a connecting rod, a lifting block is fixedly installed at the top end of the connecting rod, both ends of the bottom of the heat exchange tube are respectively fixedly connected with support blocks, and the support blocks are detachably installed on the lifting block. Annular connecting plates two are respectively fixedly connected to the outer surfaces of both ends of the heat exchange tube, and a rubber pad two contacts one side of the annular connecting plates two and the ends of the heat exchange tube;

[0009] A fixed frame is fixedly connected to one side of the heat exchange box. The number of the connecting pipes is two, moving blocks are fixedly connected to the outer surfaces of the two connecting pipes, the moving blocks are slidably connected to the inside of the fixed frame, a motor is fixedly installed on one side of the fixed frame, one end of a lead screw is fixedly connected to the motor shaft, the other end of the lead screw is rotatably connected to the inside of the fixed frame, a threaded sleeve is embedded in the moving block, and the threaded sleeve is threadedly connected to the lead screw.

[0010] Preferably, positioning rods are respectively fixedly connected to both ends of one side of the annular connecting plate one close to the annular connecting plate two, positioning holes are respectively opened at both ends of one side of the annular connecting plate two, the positioning holes are slidably connected to the positioning rods, and through holes one are respectively opened at both ends of one side of the rubber pad two.

[0011] Preferably, fixed annular plates are respectively fixedly connected to the outer surfaces of the two connecting pipes, a rubber pad one is fixedly arranged on one side of the fixed annular plate close to the heat exchange box, and the rubber pad one contacts one side of the heat exchange box.

[0012] Preferably, a water injection pipe is fixedly connected to the top surface of the water storage tank, the water injection pipe is communicated with the inside of the water storage tank, a sealing cover is arranged on the water injection pipe, and a digital display temperature sensor is arranged on the water storage tank.

[0013] Preferably, the water suction pipe extends into the water storage tank, a drain pipe is fixedly installed on one side of the bottom of the water storage tank, and a valve is arranged on the drain pipe.

[0014] Preferably, mounting grooves are respectively formed at both ends of the top surface of the lifting block, the supporting block is clamped in the mounting groove, the supporting block is connected to the lifting block through the first bolt, a third rubber pad is fixedly arranged at the bottom surface of the lifting block, the bottom surface of the third rubber pad contacts the inner bottom surface of the heat exchange box, and through holes three are respectively formed at both ends of the bottom surface of the third rubber pad.

[0015] Preferably, limiting blocks are respectively fixedly connected to both sides of the moving block, limiting grooves are respectively formed on both sides inside the fixed frame, and the limiting blocks are slidably connected to the limiting grooves.

[0016] Preferably, an exhaust pipe is fixedly installed on the top surface of the box cover, a through hole four is formed on the top surface of the box cover, the exhaust pipe and the through hole four are internally communicated, through holes two are respectively formed at both ends of one side of the heat exchange box, and the connecting pipe is slidably connected to the through holes two.

[0017] Preferably, fixing plates one are respectively fixedly connected to both sides of the box cover, fixing plates two are respectively fixedly connected to both sides of the top of the heat exchange box, and the fixing plates one are connected to the fixing plates two through the second bolt.

[0018] Preferably, a smoke inlet installation pipe is fixedly installed on one side of the bottom of the heat exchange box, a limiting annular plate is fixedly connected to one side inside the smoke inlet installation pipe, the threaded part inside the smoke inlet installation pipe is threadedly connected to the threaded part outside the annular frame, and a filter net plate is fixedly installed inside the annular frame.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0020] By arranging a fixed frame, a motor, a lead screw, a moving block, a corrugated rubber hose, a connecting pipe, a connecting annular plate one, a rubber pad two, a heat exchange pipe, a connecting annular plate two, a cylinder, a lifting block, a supporting block, etc., when it is necessary to replace and maintain the heat exchange pipe, the box cover can be disassembled. By driving the motor, the moving block, the connecting pipe, the connecting annular plate one, the rubber pad two, etc. can be driven to move, so that the corrugated rubber hose is compressed, and the rubber pad two is separated from the connecting annular plate two and the heat exchange pipe. Then, by driving the cylinder, the lifting block, the supporting block, the heat exchange pipe, etc. can be lifted to a proper position, and the heat exchange pipe and the supporting block can be disassembled for maintenance or replacement, which is convenient for the disassembly and assembly of the heat exchange pipe and facilitates the maintenance or replacement work of the heat exchange pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic structural diagram of the present invention;

[0022] Figure 2 is a front sectional structural schematic diagram of the present invention;

[0023] Figure 3 is the present invention Figure 2 the enlarged structural schematic diagram of part A in;

[0024] Figure 4 is a top sectional structural schematic diagram of a partial structure of the present invention;

[0025] Figure 5 This is a schematic top view sectional structure diagram of a local structure of the present invention;

[0026] Figure 6 This is a schematic diagram of a local structure of the present invention;

[0027] Figure 7 This is a schematic diagram of a disassembled structure of a local structure of the present invention.

[0028] In the figure: 1, base; 2, water storage tank; 3, support leg; 4, water injection pipe; 5, sealing cover; 6, drain pipe; 7, valve; 8, digital display temperature sensor; 9, support seat; 10, pump body 1; 11, water suction pipe; 12, conveying pipe; 13, pump body 2; 14, recovery pipe; 15, corrugated rubber hose; 16, connecting pipe; 17, fixed annular plate; 18, rubber pad 1; 19, connecting annular plate 1; 20, rubber pad 2; 201, through hole 1; 21, positioning rod; 22, heat exchange pipe; 23, connecting annular plate 2; 231, positioning hole; 24, through hole 2; 25, support block; 26, lifting block; 261, installation groove; 27, bolt 1; 28, rubber pad 3; 281, through hole 3; 29, cylinder; 291, connecting rod; 30, box cover; 301, through hole 4; 31, rubber pad 4; 32, smoke exhaust pipe; 33, fixing plate 1; 34, fixing plate 2; 35, bolt 2; 36, fixing frame; 361, limiting groove; 37, motor; 38, lead screw; 39, moving block; 391, threaded sleeve; 392, limiting block; 40, smoke inlet installation pipe; 41, limiting annular plate; 42, annular frame; 43, filter mesh plate; 44, heat exchange box; 45, support column. Specific embodiments

[0029] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0030] Embodiment 1:

[0031] Please refer to Figures 1-7, which is the first embodiment of the present invention. The present invention provides a technical solution: a waste heat recovery device for the flue gas of a smelting furnace, including a water storage tank 2, heat exchange tubes 22, and a heat exchange box 44. The heat exchange tubes 22 are arranged in a serpentine shape. Both ends of the bottom surface of the water storage tank 2 are fixedly connected with support legs 3, and the bottom ends of the support legs 3 are fixedly connected with a base 1, which can support the water storage tank 2. The water storage tank 2 is a heat-insulated tank. Multiple support columns 45 are fixedly connected to the bottom surface of the heat exchange box 44, and the bottom ends of the support columns 45 are fixedly connected with the base 1, which can support the heat exchange box 44. The top surface of the heat exchange box 44 contacts a fourth rubber pad 31, and a box cover 30 is fixedly arranged on the top surface of the fourth rubber pad 31. The setting of the fourth rubber pad 31 can improve the sealing performance of the connection between the box cover 30 and the heat exchange box 44. One side of the bottom of the water storage tank 2 is fixedly connected with a support seat 9, and a first pump body 10 is fixedly installed on the top of the support seat 9. A water suction pipe 11 is fixedly installed at the input end of the first pump body 10, and a delivery pipe 12 is fixedly installed at the output end of the first pump body 10. A second pump body 13 is fixedly installed on the top of the water storage tank 2, and a recovery pipe 14 is fixedly installed at the input end of the second pump body 13. One ends of the delivery pipe 12 and the recovery pipe 14 are respectively fixedly connected with one end of a corrugated rubber hose 15. The corrugated rubber hose 15 can be telescoped. The other end of the corrugated rubber hose 15 is fixedly connected with one end of a connecting pipe 16. An annular connecting plate one 19 is fixedly connected to the outer surface of the other end of the connecting pipe 16. A second rubber pad 20 is fixedly arranged on one side of the annular connecting plate one 19 and the connecting pipe 16;

[0032] Both ends of the bottom surface of the heat exchange box 44 are respectively fixedly installed with cylinders 29. The output end of the piston rod of the cylinder 29 is fixedly connected with a connecting rod 291, and a lifting block 26 is fixedly installed at the top end of the connecting rod 291. Both ends of the bottom of the heat exchange tube 22 are fixedly connected with support blocks 25, and the support blocks 25 are detachably installed on the lifting block 26. Annular connecting plates two 23 are respectively fixedly connected to the outer surfaces of both ends of the heat exchange tube 22. One side of the annular connecting plates two 23 and the ends of the heat exchange tube 22 contact the second rubber pad 20. The setting of the second rubber pad 20 can improve the sealing performance of the connection between the annular connecting plate one 19 and the annular connecting plate two 23 and the sealing performance of the connection between the connecting pipe 16 and the heat exchange tube 22;

[0033] One side of the heat exchange box 44 is fixedly connected with a fixed frame 36. The number of the connecting pipes 16 is two. Moving blocks 39 are fixedly connected to the outer surfaces of the two connecting pipes 16. The moving blocks 39 are slidably connected inside the fixed frame 36. A motor 37 is fixedly installed on one side of the fixed frame 36. One end of a lead screw 38 is fixedly connected to the rotating shaft of the motor 37, and the other end of the lead screw 38 is rotatably connected inside the fixed frame 36. A threaded sleeve 391 is embedded in the moving block 39, and the threaded sleeve 391 is threadedly connected to the lead screw 38.

[0034] Embodiment 2:

[0035] Please refer to Figures 1-7, which is the second embodiment of the present invention. This embodiment is based on the previous embodiment. At both ends of one side of the connecting annular plate 19 close to the connecting annular plate 23, positioning rods 21 are fixedly connected respectively. At both ends of one side of the connecting annular plate 23, positioning holes 231 are respectively opened. The positioning holes 231 are slidably connected with the positioning rods 21. At both ends of one side of the rubber pad two 20, through holes one 201 are respectively opened, which can be used for further positioning during the installation of the heat exchange tube 22. Driven by the motor 37, the moving block 39 moves to drive the connecting pipe 16 to move, so that the positioning rods 21 arranged on the connecting annular plate 19 move accordingly and can slide into the positioning holes 231 arranged on the connecting annular plate 23, improving the installation accuracy.

[0036] Fixed annular plates 17 are fixedly connected to the outer surfaces of the two connecting pipes 16 respectively. On one side of the fixed annular plate 17 close to the heat exchange box 44, a rubber pad one 18 is fixedly arranged. The rubber pad one 18 contacts one side of the heat exchange box 44. During the installation of the heat exchange tube 22, driven by the motor 37, the moving block 39 moves to drive the connecting pipe 16 to move, and the fixed annular plate 17 and the rubber pad one 18 move accordingly. When moving to a suitable position, the rubber pad one 18 can closely contact one side of the heat exchange box 44, improving the sealing performance.

[0037] A water injection pipe 4 is fixedly connected to the top surface of the water storage tank 2. The water injection pipe 4 is communicated with the inside of the water storage tank 2. A sealing cover 5 is arranged on the water injection pipe 4. Water can be added into the water storage tank 2 through the water injection pipe 4 by opening the sealing cover 5. A digital display temperature sensor 8 is arranged on the water storage tank 2, which can display the temperature of the water in the water storage tank 2.

[0038] The water extraction pipe 11 extends into the water storage tank 2. A drain pipe 6 is fixedly installed on one side of the bottom of the water storage tank 2. A valve 7 is arranged on the drain pipe 6. The water in the water storage tank 2 can be discharged by opening the valve 7.

[0039] Installation grooves 261 are respectively opened at both ends of the top surface of the lifting block 26. The support block 25 is clamped in the installation grooves 261. The support block 25 is connected to the lifting block 26 through a bolt one 27. A rubber pad three 28 is fixedly arranged on the bottom surface of the lifting block 26. The bottom surface of the rubber pad three 28 contacts the inner bottom surface of the heat exchange box 44. Through holes three 281 are respectively opened at both ends of the bottom surface of the rubber pad three 28. During the installation of the heat exchange tube 22, driven by the cylinder 29, the lifting block 26, the support block 25, the heat exchange tube 22, etc. move downward. When moving to a suitable position, the rubber pad three 28 arranged on the bottom surface of the lifting block 26 can closely contact the inner bottom surface of the heat exchange box 44, which can improve the sealing performance.

[0040] Limit blocks 392 are fixedly connected to both sides of the moving block 39 respectively. Limit grooves 361 are respectively opened on both sides inside the fixed frame 36. The limit blocks 392 are slidably connected with the limit grooves 361, improving the stability of the movement of the moving block 39.

[0041] A smoke exhaust pipe 32 is fixedly installed on the top surface of the box cover 30. A through hole four 301 is opened on the top surface of the box cover 30. The inside of the smoke exhaust pipe 32 and the through hole four 301 are internally connected. Two through holes two 24 are respectively opened at both ends on one side of the heat exchange box 44. The connecting pipe 16 is slidably connected to the through holes two 24.

[0042] Fixing plates one 33 are respectively fixedly connected to both sides of the box cover 30. Fixing plates two 34 are respectively fixedly connected to both sides of the top of the heat exchange box 44. The fixing plates one 33 are connected to the fixing plates two 34 through bolts two 35, which is convenient for the disassembly and assembly of the box cover 30.

[0043] An inlet smoke installation pipe 40 is fixedly installed on one side of the bottom of the heat exchange box 44. During the flue gas waste heat recovery work, the inlet smoke installation pipe 40 of this application can be connected to the smoke exhaust port of the smelting furnace. A limiting annular plate 41 is fixedly connected to one side inside the inlet smoke installation pipe 40. The threaded part inside the inlet smoke installation pipe 40 is threadedly connected to the threaded part outside the annular frame 42. A filter screen plate 43 is fixedly installed inside the annular frame 42. The annular frame 42 and the filter screen plate 43 can be disassembled by screwing out the annular frame 42, which is convenient for the cleaning or replacement of the filter screen plate 43. During the flue gas waste heat recovery work, the flue gas of the smelting furnace passes through the filter screen plate 43 arranged inside the annular frame 42 and then enters the heat exchange box 44 through the inlet smoke installation pipe 40. At the same time, the pump one 10 is externally connected to a power source, and the pump two 13 is externally connected to a power source. By starting the pump one 10 and the pump two 13, the water in the water storage tank 2 can be pumped out through the water extraction pipe 11 and transported to the heat exchange pipe 22 through the delivery pipe 12, the corrugated rubber hose 15, and the connecting pipe 16. The water passes through the serpentine heat exchange pipe 22, and the waste heat in the flue gas is converted and transferred to the water in the heat exchange pipe 22 through the heat exchange pipe 22. After the water is heated, it is input into the water storage tank 2 through the upper connecting pipe 16, the corrugated rubber hose 15, and the recovery pipe 14. The flue gas whose heat is absorbed and cooled is discharged through the smoke exhaust pipe 32. The heated water can be stored in the water storage tank 2 for waiting to be used.

[0044] Embodiment 3:

[0045] Please refer to Figures 1-7, which is the third embodiment of the present invention. Based on the above two embodiments, when the heat exchange tube 22 needs to be maintained or replaced during the actual use of the present invention, the box cover 30 can be disassembled by removing the second bolt 35. The motor 37 is externally powered. By starting the motor 37 to drive the lead screw 38 to rotate, the moving block 39, the connecting pipe 16, the first connecting annular plate 19, the second rubber pad 20, the positioning rod 21, etc. can be driven to move. The corrugated rubber hose 15 is compressed accordingly. The second rubber pad 20 is separated from the second connecting annular plate 23 and the heat exchange tube 22, and the positioning rod 21 is separated from the positioning hole 231 provided on the second connecting annular plate 23. The cylinder 29 is externally powered. By starting the cylinder 29 to drive the lifting block 26, the support block 25, the heat exchange tube 22, etc. to move upward. When it moves to a suitable position, the first bolt 27 can be removed, and the heat exchange tube 22 and the support block 25 can be disassembled for maintenance or replacement, which is convenient for the disassembly and assembly of the heat exchange tube 22 and facilitates the maintenance or replacement work of the heat exchange tube 22.

[0046] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A smelting furnace flue gas waste heat recovery device, comprising a water storage tank (2), a heat exchange tube (22), and a heat exchange box (44), characterized in that: The two ends of the bottom surface of the water storage tank (2) are respectively fixedly connected to support legs (3), the bottom ends of the support legs (3) are fixedly connected to the base (1), the bottom surface of the heat exchange box (44) is fixedly connected to a plurality of support columns (45), the bottom surfaces of the support columns (45) are fixedly connected to the base (1), the top surface of the heat exchange box (44) contacts a rubber pad four (31), the top surface of the rubber pad four (31) is fixedly provided with a box cover (30), one side of the bottom of the water storage tank (2) is fixedly connected to a support seat (9), a pump body one (10) is fixedly installed on the top of the support seat (9), a pump pipe (11) is fixedly installed on the input end of the pump body one (10), and the The delivery pipe (12) is fixedly installed at the output end of the pump body (10), the pump body (13) is fixedly installed on the top of the water storage tank (2), and the recovery pipe (14) is fixedly installed at the input end of the pump body (13). The ends of the delivery pipe (12) and the recovery pipe (14) are respectively fixedly connected to one end of a corrugated rubber hose (15), and the other end of the corrugated rubber hose (15) is fixedly connected to one end of a connecting pipe (16). The outer surface of the other end of the connecting pipe (16) is fixedly connected to a connecting annular plate (19), and a rubber pad (20) is fixedly provided on one side of the connecting annular plate (19) and the connecting pipe (16); The two ends of the bottom surface of the heat exchange box (44) are respectively fixedly mounted with a cylinder (29); the output end of the piston rod of the cylinder (29) is fixedly connected to a connecting rod (291); the top of the connecting rod (291) is fixedly mounted with a lifting block (26); the two ends of the bottom of the heat exchange tube (22) are respectively fixedly connected to a supporting block (25); the supporting block (25) is detachably mounted on the lifting block (26); the outer surfaces of the two ends of the heat exchange tube (22) are respectively fixedly connected to a second annular plate (23); the second annular plate (23) and one side of the end of the heat exchange tube (22) contact a second rubber pad (20); One side of the heat exchange box (44) is fixedly connected to a fixed frame (36), the number of the connecting pipes (16) is two, the outer surfaces of the two connecting pipes (16) are fixedly connected to a moving block (39), the interior of the fixed frame (36) is slidably connected to the moving block (39), a motor (37) is fixedly installed on one side of the fixed frame (36), one end of the screw rod (38) is fixedly connected to the rotating shaft of the motor (37), the other end of the screw rod (38) is rotatably connected to the fixed frame (36), a threaded sleeve (391) is embedded in the moving block (39), and the threaded sleeve (391) is threadedly connected to the screw rod (38).

2. The device for recovering waste heat from flue gas of a smelting furnace according to claim 1, characterized in that: The two ends of one side of the connecting annular plate 1 (19) close to the connecting annular plate 2 (23) are respectively fixedly connected to the positioning rod (21), and the two ends of one side of the connecting annular plate 2 (23) are respectively provided with positioning holes (231), and the positioning holes (231) are slidably connected to the positioning rod (21), and the two ends of one side of the rubber pad 2 (20) are respectively provided with through holes 1 (201).

3. The device for recovering waste heat from flue gas of a smelting furnace according to claim 2, characterized in that: The outer surfaces of the two connecting pipes (16) are respectively fixedly connected to a fixed annular plate (17), and a rubber pad (18) is fixedly provided on one side of the fixed annular plate (17) close to the heat exchange box (44), and the rubber pad (18) contacts one side of the heat exchange box (44).

4. The device for recovering waste heat from flue gas of a smelting furnace according to claim 3, characterized in that: The top surface of the water storage tank (2) is fixedly connected to a water injection pipe (4), the water injection pipe (4) is in communication with the interior of the water storage tank (2), a sealing cover (5) is provided on the water injection pipe (4), and a digital display temperature sensor (8) is provided on the water storage tank (2).

5. The device for recovering waste heat from flue gas of a smelting furnace according to claim 4, characterized in that: The water pumping pipe (11) extends into the water storage tank (2), a drainage pipe (6) is fixedly installed on one side of the bottom of the water storage tank (2), and a valve (7) is provided on the drainage pipe (6).

6. A smelting furnace flue gas waste heat recovery device according to claim 5, characterized in that: The two ends of the top surface of the lifting block (26) are respectively provided with mounting grooves (261); the support block (25) is clamped in the mounting grooves (261); the support block (25) is connected to the lifting block (26) via a bolt (27); a rubber pad (28) is fixedly provided on the bottom surface of the lifting block (26); the bottom surface of the rubber pad (28) contacts the inner bottom surface of the heat exchange box (44); and three through holes (281) are respectively provided on the two ends of the bottom surface of the rubber pad (28).

7. The device for recovering waste heat from flue gas of a smelting furnace according to claim 6, characterized in that: The two sides of the movable block (39) are respectively fixedly connected to the limiting blocks (392), the two sides of the fixed frame (36) are respectively provided with limiting grooves (361), and the limiting blocks (392) are slidably connected to the limiting grooves (361).

8. The device for recovering waste heat from flue gas of a smelting furnace according to claim 7, characterized in that: A smoke exhaust pipe (32) is fixedly mounted on the top surface of the box cover (30), and a through hole four (301) is provided on the top surface of the box cover (30). The smoke exhaust pipe (32) and the through hole four (301) are internally connected, and a through hole two (24) is respectively provided at both ends of one side of the heat exchange box (44), and the connecting pipe (16) is slidably connected to the through hole two (24).

9. The device for recovering waste heat from flue gas of a smelting furnace according to claim 8, characterized in that: The two sides of the box cover (30) are respectively fixedly connected to the fixing plate 1 (33), and the two sides of the top of the heat exchange box (44) are respectively fixedly connected to the fixing plate 2 (34), and the fixing plate 1 (33) is connected to the fixing plate 2 (34) by bolt 2 (35).

10. The device for recovering waste heat from flue gas of a smelting furnace according to claim 9, characterized in that: A smoke inlet installation pipe (40) is fixedly mounted on one side of the bottom of the heat exchange box (44); a limiting annular plate (41) is fixedly connected to one side of the inside of the smoke inlet installation pipe (40); the internal thread of the smoke inlet installation pipe (40) is threadedly connected to the external thread of the annular frame (42); and a filter screen plate (43) is fixedly mounted inside the annular frame (42).

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