Waste heat recovery and comprehensive utilization system of molten copper smelting furnace

Abstract

The invention belongs to the technical field of waste heat recovery, and particularly relates to a waste heat recovery comprehensive utilization system of a molten copper smelting furnace, which comprises a waste heat recovery utilization device, the waste heat recovery utilization device comprises a machine body, an opening on one side of the machine body is communicated with the molten copper smelting furnace through a flue gas recovery pipeline, and an opening on the other side of the machine body is communicated with a flue gas discharge pipeline. A waste heat recovery cavity is formed in the machine body; according to the waste heat recovery device, cold water is fed to transversely flow back and forth along the heating pipe and is in full contact with flue gas flowing in the waste heat recovery cavity, so that heat in the contact flue gas is recycled; as for residual particle impurities in the smoke, the annular heat absorption sleeve is arranged on the outer side of the heating pipe, the particle impurities large in size in the smoke can be intercepted, collision between the particle impurities in the smoke and the outer surface of the heating pipe is reduced, and dirt formed by the particle impurities adhering to the outer surface of the heating pipe can also be reduced; and normal operation of waste heat recovery operation is ensured.

Description

Technical Field

[0001] This invention belongs to the field of waste heat recovery technology, specifically a comprehensive waste heat recovery and utilization system for a copper smelting furnace. Background Technology

[0002] Copper smelting furnaces (such as cupola furnaces, induction furnaces, and reverberatory furnaces) generate a large amount of waste heat during the copper smelting process. The waste heat sources are concentrated and the temperature gradient is wide (the flue gas temperature can reach 800-1400℃, and the furnace body heat dissipation / cooling medium temperature can reach 100-400℃), with huge recovery potential.

[0003] Reasonable waste heat recovery and comprehensive utilization can not only reduce energy consumption per ton of copper (energy consumption accounts for 15%-25% of production costs in the copper smelting industry), but also reduce emissions of gases such as carbon dioxide and nitrogen oxides, which meets the requirements of green industrial development.

[0004] Copper smelting furnaces heat copper materials to melt them during operation, generating a large amount of flue gas. The flue gas contains heat lost during the heating process, as well as dust particles and impurities generated during copper smelting. The outflow of these flue gases causes heat loss in the copper smelting furnace and increases energy consumption. Summary of the Invention

[0005] To overcome the shortcomings of existing technologies and solve the aforementioned technical problems, this invention proposes a comprehensive waste heat recovery and utilization system for copper molten metal furnaces.

[0006] The technical solution adopted by the present invention to solve its technical problem is as follows: The present invention proposes a comprehensive waste heat recovery and utilization system for a copper molten furnace, including a waste heat recovery and utilization device. The waste heat recovery and utilization device includes a body. One side of the body is open and connected to the copper molten furnace through a flue gas recovery pipe, and the other side is open and connected to a flue gas emission pipe. A waste heat recovery chamber is provided inside the body. The heating tube passes through the waste heat recovery chamber and is connected to the energy-saving boiler, through which process water is introduced to absorb heat from the flue gas. The heating tube located inside the waste heat recovery chamber is a horizontal straight pipe structure, and is wrapped with a heat-absorbing sleeve on the outside. The two ends of the heat-absorbing sleeve are nested on the outer surface of the heating tube by a first fixing ring and a second fixing ring, respectively. The heat-absorbing sleeve is a metal filter structure, and a heating gap is formed between the heat-absorbing sleeve and the outer surface of the heating tube.

[0007] Preferably, the outer surface of the heat-absorbing sleeve protrudes outward to form an annular protrusion, and the protrusion is evenly distributed along the outer surface of the heating tube.

[0008] Preferably, the heating gap is filled with heating particles, and the heating particles are made of a metal thermally conductive material; Both the first and second fixing rings are rotatably connected to the inner wall of the waste heat recovery chamber, and the first fixing ring is connected to the output end of the rotating device on the inner wall of the waste heat recovery chamber to drive the heat absorption sleeve to rotate relative to the heating tube.

[0009] Preferably, the outer surface of the portion of the heating tube located inside the heat-absorbing sleeve is covered with a protective sleeve, the protective sleeve being made of a high-temperature resistant fabric mixed with metal fibers.

[0010] Preferably, the inner wall of the waste heat recovery chamber is provided with an annular mounting groove at the part corresponding to the second fixing ring, and the second fixing ring includes a mounting part and a vibration part; The mounting part is slidably embedded in the mounting groove. The mounting part and the vibrating part are elastically connected. The end of the heat-absorbing sleeve is fixed on the vibrating part. A vibrator is provided inside the vibrating part. The vibrator is controlled by an external controller.

[0011] Preferably, the heat-absorbing sleeve portion corresponding to the protrusion is made of elastic metal material.

[0012] Preferably, the mounting groove is connected to an external purification fan via a connecting pipe, and a purification hole is provided at the position of the vibrating part facing the heating gap. The purification hole is connected to the gap area between the vibrating part and the mounting part, and the gap area between the vibrating part and the mounting part is connected to the interior of the mounting groove.

[0013] Preferably, the outer surface of the heating tube is provided with a flow guide groove, the flow guide groove is located in the gap area between the protective sleeve and the heating tube, and the end of the flow guide groove extends into the mounting groove.

[0014] The beneficial effects of this invention are as follows: The waste heat recovery and utilization system for a copper smelting furnace described in this invention involves feeding cold water that flows laterally back and forth along the heating pipes, ensuring full contact with the flue gas flowing inside the waste heat recovery chamber. This allows the system to fully absorb the heat from the flue gas and increase the temperature of the internally flowing cold water. For residual particulate impurities in the flue gas, an annular heat-absorbing sleeve is installed on the outside of the heating pipes. This reduces the flow velocity of the flue gas as it passes through the sleeve, improving the efficiency of heat recovery and utilization. Furthermore, the heat-absorbing sleeve can intercept larger particulate impurities in the flue gas, reducing collisions between these impurities and the outer surface of the heating pipes, and also reducing the adhesion of impurities to the outer surface of the heating pipes to form scale, ensuring the normal operation of the waste heat recovery process. Attached Figure Description

[0015] The invention will now be further described with reference to the accompanying drawings.

[0016] Figure 1 This is a perspective view of the present invention; Figure 2 This is a cross-sectional view of the present invention; Figure 3 yes Figure 2 A magnified view of a section at point A in the middle; Figure 4 This is a cross-sectional view of the heating tube and the heat-absorbing jacket in this invention; Figure 5 This is a perspective view of the second fixing ring in this invention.

[0017] In the diagram: Body 1, Waste heat recovery chamber 11, Mounting groove 111, Connecting pipe 112, Heating pipe 12, Guide groove 121, Heat absorption sleeve 13, Protrusion 131, First fixing ring 14, Second fixing ring 15, Mounting part 151, Vibration part 152, Purification hole 153, Heating gap 16, Protective sleeve 17, Recovery chamber 2, Interception net 21, Recovery air pipe 22. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Example 1: As shown in the attached diagram of the instruction manual. Figures 1-5 As shown, this application proposes a comprehensive waste heat recovery and utilization system for a copper smelting furnace, including a flue gas recovery pipeline and a waste heat recovery and utilization device. The waste heat recovery and utilization device includes a body 1, with one side of the body 1 connected to the copper smelting furnace through the flue gas recovery pipeline and the other side connected to the flue gas emission pipeline. A waste heat recovery chamber 11 is provided inside the body 1. A bag filter or other dust removal equipment is installed in the middle of the flue gas recovery pipeline to remove large particulate dust impurities mixed in with the flue gas. The flue gas flowing out of the flue gas emission pipeline needs to be sent to a wet scrubber or other dust removal and cooling equipment for further purification to remove harmful components. Finally, after passing the test, it is discharged normally, thereby ensuring that energy saving and emission reduction can be achieved while reducing pollution to the surrounding environment during the entire flue gas treatment and waste heat recovery process. The heating tube 12 passes through the waste heat recovery chamber 11 and is connected to the energy-saving boiler. Cold water, which is used as process water, is introduced to absorb heat from the flue gas. The part of the heating tube 12 inside the waste heat recovery chamber 11 is a horizontal straight pipe structure, and the outside is wrapped with a heat-absorbing sleeve 13. The two ends of the heat-absorbing sleeve 13 are nested on the outer surface of the heating tube 12 by the first fixing ring 14 and the second fixing ring 15, respectively. The heat-absorbing sleeve 13 is made of metal filter mesh material, and a heating gap 16 is formed between the heat-absorbing sleeve 13 and the outer surface of the heating tube 12.

[0020] Depending on the needs, if it is necessary to ensure the efficiency of flue gas passage and require the flue gas to pass through quickly, for vertically distributed heating pipes 12, heat absorption sleeves 13 can be installed on some of the horizontal straight pipe sections; if it is necessary to ensure the full recovery of heat in the flue gas, heat absorption sleeves 13 can be installed on more horizontal straight pipes, and the waste heat of the flue gas can be fully recovered by reducing the flue gas flow rate and extending the flue gas residence time.

[0021] Specific workflow: During operation, the copper smelting furnace heats copper to melt it, generating a large amount of flue gas. This flue gas carries heat lost during the heating process, as well as particulate impurities from the copper smelting process. The outflow of this flue gas causes heat loss in the copper smelting furnace, increasing energy consumption. Therefore, in order to recover this lost heat and achieve energy conservation and emission reduction, this application recovers the flue gas generated during copper smelting through a flue gas recovery pipeline. After preliminary filtration by dust removal equipment such as a bag filter, the high-temperature flue gas is passed through a waste heat recovery device, allowing it to contact the process water and absorb waste heat to heat the process water. The heated process water is then transported to energy-saving boilers and other equipment for utilization. Specifically, an external water pump is started to deliver cold water, which is used as process water, to the heating tube 12. The heating tube 12 has a continuous curved structure, which allows the cold water to flow laterally back and forth along the heating tube 12, repeatedly passing through the waste heat recovery chamber 11 and fully contacting the flue gas flowing inside the waste heat recovery chamber 11. The heating tube 12 is made of a metal material with good thermal conductivity, so it can fully absorb the heat of the contacting flue gas and increase the temperature of the cold water flowing inside. As for the particulate impurities remaining in the flue gas, an annular heat-absorbing sleeve 13 is set on the outside of the heating tube 12. On the one hand, when the flue gas flows laterally, penetrates the heat-absorbing sleeve 13 and enters the heating gap 16, it fully covers the heat-absorbing sleeve 13, reduces the flue gas velocity, prolongs the contact time between the flue gas and the heat-absorbing sleeve 13, thereby fully absorbing the heat in the flue gas and transferring the heat to the connected heating tube 12, improving the efficiency of heat recovery and utilization in the flue gas. On the other hand, when the flue gas passes through the heat-absorbing jacket 13 of the filter structure, larger particulate impurities in the flue gas are intercepted by the heat-absorbing jacket 13 and separated to the outside of the heat-absorbing jacket 13. This reduces the collision between particulate impurities in the flue gas and the outer surface of the heating tube 12 when the flue gas comes into contact with the heating tube 12, thereby reducing damage to the heating tube 12. At the same time, reducing the contact between particulate impurities and the heating tube 12 can also reduce the situation where particulate impurities adhere to the outer surface of the heating tube 12 and form dirt, affecting the heat transfer performance of the side wall of the heating tube 12, and ensuring the normal operation of the waste heat recovery operation. In order to ensure the working effect of the heat-absorbing jacket 13, the body 1 can be opened regularly to clean and replace the internal heat-absorbing jacket 13 to ensure the normal operation of this application.

[0022] Example 2: Based on Embodiment 1, the outer surface of the heat-absorbing sleeve 13 protrudes outward to form an annular protrusion 131, which is evenly distributed along the outer surface of the heating tube 12; the heating gap 16 is filled with heating particles, which are made of a metal heat-conducting material. The first fixed ring 14 and the second fixed ring 15 are rotatably connected to the heating tube 12. The first fixed ring 14 is connected to the output end of the rotating device on the inner wall of the waste heat recovery chamber 11 to drive the heat absorption sleeve 13 to rotate relative to the heating tube 12. There are several possible implementation schemes for the specific transmission connection between the first fixed ring 14 and the rotating device. For example, a ring gear can be provided on the outer circular end of the first fixed ring 14, and the rotating device can be a motor with a drive gear at the output end. The drive gear meshes with the ring gear to drive the rotating device. Through the meshing transmission of the drive gear and the ring gear, the first fixed ring 14 drives the heat absorption sleeve 13 to rotate relative to the heating tube 12.

[0023] Specific workflow: Based on the specific workflow in Example 1, in order to improve the efficiency of heat recovery and utilization in flue gas, the surface of the heat-absorbing sleeve 13 is provided with continuous and uniformly distributed annular protrusions, which increases the contact area between the heat-absorbing sleeve 13 and the flue gas; and the heating gap 16 is filled with heating particles. The heating particles with good thermal conductivity are filled into the internal area of ​​the heating gap 16, thus establishing a uniformly distributed heat transfer path between the heat-absorbing sleeve 13 and the heating tube 12. In this way, while the flue gas contacts the heat-absorbing sleeve 13 and transfers heat to the heat-absorbing sleeve 13, the heat-absorbing sleeve 13 can transfer heat to the contacting heating tube 12 through the contacting heating particles. Since the thermal conductivity of solid heat-conducting medium is much better than that of gaseous heat-conducting medium, the heating tube 12 can be heated more efficiently. Furthermore, because the heating particles filling the heat-absorbing sleeve 13 and its heating gap 16 block the flue gas flow path, the flue gas needs to penetrate the heat-absorbing sleeve 13 and the heating gap 16, and flow through the gaps between the heating particles inside the heating gap 16, making full contact with the gaps between the heating particles. This results in a larger contact area between the flue gas and the heating particles, allowing for full absorption of heat from the flue gas. The loose state of the heating particles can further remove particulate impurities from the flue gas, resulting in fewer particulate impurities in the flue gas that finally comes into contact with the heating tube 12. This can better protect the heating tube 12 and extend its working life. Furthermore, a recovery chamber 2 is provided at the bottom of the body 1. The recovery chamber 2 is easy to disassemble. The recovery chamber 2 is connected to the interior of the waste heat recovery chamber 11. An interception net 21 is provided in the middle part of the recovery chamber 2. The area under the interception net 21 is connected to the external air pump equipment through the recovery air pipe 22. When the waste heat recovery device needs to be cleaned after working for a period of time, close the opening connecting the body 1 to the flue gas recovery pipe, connect the other opening to the air pump equipment, and send in purified airflow. The bottom recovery air pipe 22 is connected to the air inlet of the air pump equipment, so that a vertical downward airflow is formed inside the waste heat recovery chamber 11, passes through the interception net 21 from the bottom recovery chamber 2, and is recovered by the recovery air pipe 22. The control rotation device is started, driving the first fixed ring 14 to rotate the heat absorption sleeve 13 relative to the heating tube 12. During this process, the rotating heat absorption sleeve 13 rubs and drives the heating particles in the heating gap 16, causing the heating particles in the heating gap 16 to flow to each other and impact each other. At the same time, the heating particles also impact the surface of the heat absorption sleeve 13, causing the separated particulate impurities to separate from the adhesion surface under the action of frictional contact. Due to gravity and the scouring of the vertical downward airflow, they enter the recovery chamber 2 and continue to accumulate on the upper side of the interception net 21. The recovery chamber 2 is disassembled periodically to clean the dust and impurities collected inside.

[0024] Example 3: Based on Example 2, the outer surface of the part of the heating tube 12 located inside the heat-absorbing sleeve 13 is covered with a protective sleeve 17, which is made of a fabric mixed with metal fibers.

[0025] Specific workflow: Based on the specific workflow in Example 2, in order to reduce the wear on the sidewall of the heating tube 12 caused by the friction of the flowing heating particles, a protective sleeve 17 is covered on the outer surface of the heating tube 12. The protective sleeve 17 is made of woven metal fiber. This makes the protective sleeve 17 a flexible structure, so that when it is subjected to the frictional impact of the flowing heating particles, the friction can be alleviated through flexible deformation, reducing the wear of the protective sleeve 17 and better protecting the heating tube 12 it covers. In addition, the material is metal fiber, which makes the protective sleeve 17 have good thermal conductivity, so that the heat of the heating particles in contact with the outer surface can be transferred to the inner heating tube 12, improving the efficiency of heat recovery and utilization of flue gas. Furthermore, because the surface friction of the protective sleeve 17 is greater than that of the smooth outer surface of the heating tube 12, when the heat-absorbing sleeve 13 is driven to rotate by the rotating device, the heating particles in the heating gap 16 are slower in flow rate due to the friction of the protective sleeve 17 on the inner side than on the outer side. This results in a difference in flow rate between the heating particles near the inner and outer sides of the heating gap 16, which in turn causes shear force between the heating particles with different flow rates. This causes the heating particle groups that tend to agglomerate to break up due to the shear force, and promotes mutual diffusion and full mixing between the heating particles in different parts, resulting in a uniform temperature distribution of the heating particles as a whole. This allows for better heat transfer to the central heating tube 12 and heating of the internal flowing cold water, thereby improving the efficiency of waste heat recovery.

[0026] Example 4: Based on Embodiment 3, an annular mounting groove 111 is provided on the inner wall of the waste heat recovery chamber 11 at the part corresponding to the second fixing ring 15. The second fixing ring 15 includes a mounting part 151 and a vibration part 152. The mounting part 151 is slidably embedded into the mounting groove 111. The mounting part 151 and the vibrating part 152 are elastically connected, and the end of the heat-absorbing sleeve 13 is fixed to the vibrating part 152. Specifically, the elastic connection can be achieved by the vibrating part 152, which is an annular plate structure, being slidably embedded into the positioning hole provided at the corresponding position on the mounting part 151 through a positioning rod. The positioning rod and the positioning hole are connected by a spring, thus achieving an elastic connection between the vibrating part 152 and the mounting part 151. In addition, the annular mounting part 151 is slidably connected to the mounting groove 111 through an annular protrusion on its outer end, which restricts the mounting part 151, allowing it to rotate only around the heating tube 12. Meanwhile, the vibrating part 152 can perform elastic vibration in the horizontal direction while the mounting part 151 rotates. The vibrating part 152 is equipped with a vibrator, which can be a miniature vibration motor. The vibrator is controlled by an external controller. The heat-absorbing sleeve 13 part corresponding to the protrusion 131 is made of elastic metal, while other parts can be made of rigid metal or metal with less elasticity than the protrusion 131.

[0027] Specific workflow: Based on the specific workflow in Example 3, during the process of flue gas passing through the heat-absorbing sleeve 13 and the internal heating gap 16, in order to ensure the passage of the heating particles, the vibrator is started by the controller. After starting, the vibrator can drive the vibrating part 152 to perform horizontal elastic vibration relative to the mounting part 151. This drives the connected heat-absorbing sleeve 13 to perform elastic vibration, removing the surface adhering particulate impurities while causing the heat-absorbing sleeve 13 to be subjected to horizontal lateral compression. This causes the heat-absorbing sleeve 13 to slide back and forth in a small amplitude relative to the heating tube 12. This causes the heating particles located in the heating gap 16 to be subjected to the friction and compression of the heat-absorbing sleeve 13, accelerating the mutual collision and friction between the heating particles, so that the flue gas dust impurities adhering to the heating particles are fully separated. Furthermore, because the heat-absorbing sleeve 13 corresponding to the protrusion 131 has strong elasticity, the lateral compression causes the space of the heating gap 16 corresponding to the protrusion 131 to change. The compression causes the internal heating particles to be squeezed out, and the subsequent deformation recovery causes the external heating particles to enter. This repetitive process accelerates the mutual flow and exchange process between the heating particles in the area surrounded by the protrusion 131 and the heating particles in the outer area, and also strengthens the lateral flow and exchange of heating particles, avoiding the problem that the flowability of heating particles in a local area is affected due to the accumulation of smoke and dust impurities.

[0028] Example 5: Based on Embodiment 4, the mounting groove 111 is connected to the external purification fan through the connecting pipe 112, and the vibrating part 152 is provided with a purification hole 153 in the part facing the heating gap 16. The purification hole 153 is connected to the gap area between the vibrating part 152 and the mounting part 151, and the gap area between the vibrating part 152 and the mounting part 151 is connected to the inside of the mounting groove 111. A guide groove 121 is provided on the outer surface of the heating tube 12. The guide groove 121 is located in the gap area between the protective sleeve 17 and the heating tube 12, and the end of the guide groove 121 extends into the mounting groove 111.

[0029] Specific workflow: Based on the specific workflow in Example 4, when cleaning the heat-absorbing sleeve 13 and the heating particles, the purification fan can be started at the same time as the vibrator is started, so that the clean purification airflow flows from the connecting pipe 112 into the mounting groove 111. Because the gap area between the vibrating part 152 and the mounting part 151 is connected to the inside of the mounting groove 111, some of the purification airflow enters the gap area and flows into the heating gap 16 from the purification hole 153, and then flows laterally along the gap area between the heating particles. With the rotation and vibration of the heat-absorbing sleeve 13, the heating particles are washed by the airflow during the mutual flow and collision, which accelerates the separation of particulate impurities adhering to the surface of the heating particles and the surface of the heat-absorbing sleeve 13. Furthermore, because the end of the guide channel 121 extends into the mounting groove 111, the purified airflow enters the gap between the heating tube 12 and the protective sleeve 17 along the guide channel 121, which increases the air pressure in the gap area between the heating tube 12 and the protective sleeve 17. The purified airflow permeates and flows outward along the gaps on the protective sleeve 17, carrying away the particulate impurities adhering to the surface of the protective sleeve 17. At the same time, the lateral flow of the purified airflow washes away the heated particles in the heating gap 16 from multiple directions and angles, expanding the range of action and cleaning effect of the purified airflow, and ensuring the passability of the flue gas in the subsequent process. After the purification fan has been running for a period of time, the air pump connected to the bottom recovery chamber 2 can be started, so that the purified airflow carries the cleaned dust and impurities downward into the recovery chamber 2 and is collected and contained.

[0030] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A comprehensive waste heat recovery and utilization system for a copper smelting furnace, comprising a waste heat recovery and utilization device, characterized in that: The waste heat recovery and utilization device includes a body (1), one side of the body (1) is connected to the copper smelting furnace through a flue gas recovery pipe, and the other side is connected to the flue gas emission pipe. A waste heat recovery chamber (11) is provided inside the body (1). The heating tube (12) passes through the waste heat recovery chamber (11) and is connected to the energy-saving boiler, introducing process water to absorb heat from the flue gas; The heating tube (12) located inside the waste heat recovery chamber (11) is a horizontal straight pipe structure, and is wrapped with a heat-absorbing sleeve (13) on the outside. The two ends of the heat-absorbing sleeve (13) are nested on the outer surface of the heating tube (12) by a first fixing ring (14) and a second fixing ring (15) respectively. The heat-absorbing sleeve (13) is a metal filter structure, and a heating gap (16) is formed between the heat-absorbing sleeve (13) and the outer surface of the heating tube (12).

2. The waste heat recovery and comprehensive utilization system for a copper smelting furnace according to claim 1, characterized in that: The outer surface of the heat-absorbing sleeve (13) protrudes outward to form an annular protrusion (131), which is evenly distributed along the outer surface of the heating tube (12).

3. The waste heat recovery and comprehensive utilization system for a copper smelting furnace according to claim 2, characterized in that: The heating gap (16) is filled with heating particles, which are made of a metal thermally conductive material. The first fixing ring (14) and the second fixing ring (15) are rotatably connected to the inner wall of the waste heat recovery chamber (11), and the first fixing ring (14) is connected to the output end of the rotating device on the inner wall of the waste heat recovery chamber (11) to drive the heat absorption sleeve (13) to rotate relative to the heating tube (12); The bottom of the body (1) is provided with a recovery chamber (2), which is connected to the interior of the waste heat recovery chamber (11). An interception net (21) is provided in the middle part of the recovery chamber (2), and the area below the interception net (21) is connected to the external air pump equipment through the recovery air pipe (22).

4. The waste heat recovery and comprehensive utilization system for a copper smelting furnace according to claim 3, characterized in that: The outer surface of the heating tube (12) located inside the heat-absorbing sleeve (13) is covered with a protective sleeve (17), which is made of a high-temperature resistant fabric mixed with metal fibers.

5. The waste heat recovery and comprehensive utilization system for a copper smelting furnace according to claim 4, characterized in that: The inner wall of the waste heat recovery chamber (11) is provided with an annular mounting groove (111) at the part corresponding to the second fixing ring (15). The second fixing ring (15) includes a mounting part (151) and a vibration part (152). The mounting part (151) is slidably embedded in the mounting groove (111). The mounting part (151) and the vibration part (152) are elastically connected. The end of the heat-absorbing sleeve (13) is fixed on the vibration part (152). A vibrator is provided inside the vibration part (152). The vibrator is controlled by an external controller.

6. The waste heat recovery and comprehensive utilization system for a copper smelting furnace according to claim 5, characterized in that: The heat-absorbing sleeve (13) corresponding to the protrusion (131) is made of elastic metal.

7. The waste heat recovery and comprehensive utilization system for a copper smelting furnace according to claim 6, characterized in that: The mounting groove (111) is connected to the external purification fan through the connecting pipe (112), and the vibration part (152) is provided with a purification hole (153) facing the heating gap (16). The purification hole (153) is connected to the gap area between the vibration part (152) and the mounting part (151), and the gap area between the vibration part (152) and the mounting part (151) is connected to the inside of the mounting groove (111).

8. The waste heat recovery and comprehensive utilization system for a copper smelting furnace according to claim 7, characterized in that: The outer surface of the heating tube (12) is provided with a flow guide groove (121), which is located in the gap area between the protective sleeve (17) and the heating tube (12), and the end of the flow guide groove (121) extends into the mounting groove (111).

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