Lifting type high-temperature melt waste heat recovery and cleaning device

Abstract

The utility model discloses a lifting type high-temperature melt waste heat recycling and cleaning device. Relates to the technical field of non-ferrous metal metallurgy. A hanging bracket is slidably connected to the support in the vertical direction, and a heat exchange unit is arranged on the hanging bracket. The heat exchange unit comprises a shell and an inner core, and the inner core is arranged in the shell and forms an interlayer; a water inlet and a steam outlet are formed in the shell and the inner core; a coiled water pipe is arranged in the inner cavity of the inner core, one end of the water pipe is connected with a water supply system through a water inlet, and the other end is connected with a steam system through a steam outlet; the support is further provided with a lifting unit. Through the arrangement of the heat exchange unit and the lifting unit, a water body in the water passing pipe is heated through heat of a molten mass, the molten mass is finally gasified into water vapor, the water vapor is discharged through the other end and enters a boiler steam system, the waste heat utilization process can be continuous along with supply of inlet water, and finally qualified saturated steam meeting industrial use is produced; and the resource recycling capability is improved.

Description

Technical Field

[0001] This utility model relates to the field of non-ferrous metal smelting technology, and in particular to a lifting-type high-temperature melt waste heat recovery and cleaning device. Background Technology

[0002] In the field of non-ferrous metal smelting technology, there are many medium- and high-temperature fluids, such as medium- and high-temperature flue gas, high-temperature slag, medium- and high-temperature molten metal, and high-temperature molten salt. Currently, the research and application of waste heat recovery for medium- and high-temperature fluids in the non-ferrous metal smelting industry is very limited. The most widely used method is waste heat recovery from high-temperature flue gas, which is limited to generating saturated steam. The electricity generated by sending this steam to the power generation system is far less than that generated by the superheated system. For most other medium- and high-temperature fluids, heat loss occurs during the process flow, and no recovery measures are implemented.

[0003] In pyrometallurgical processes, apart from high-temperature flue gas, the recovery of waste heat from other medium- and high-temperature fluids remains a gap. Furthermore, under actual working conditions, high-temperature melts often contain a large amount of waste residue, which requires regular manual cleaning; otherwise, it can easily cause blockage of the flow channels. Utility Model Content

[0004] In order to recover the waste heat of high-temperature melt and achieve efficient resource utilization, this application provides a lifting-type high-temperature melt waste heat recovery and cleaning device.

[0005] This application provides a lifting-type high-temperature melt waste heat recovery and cleaning device, which adopts the following technical solution:

[0006] A lifting-type high-temperature melt waste heat recovery and cleaning device includes a support frame positioned above a melting channel; a hanger is slidably connected to the support frame in a vertical direction, and a heat exchange unit is mounted on the hanger, which slides to enter or exit the melting channel; the heat exchange unit includes a shell and an inner core, with the inner core disposed within the shell to form a sandwich; a water inlet and a steam outlet are provided on the shell and the inner core; a coiled water pipe is provided in the inner cavity of the inner core, one end of which is connected to a water supply system via the water inlet, and the other end of which is connected to a steam system via the steam outlet; a lifting unit is also provided on the support frame to drive the hanger to slide; the sandwich between the shell and the inner core is filled with a lead-bismuth alloy; gaps are left between the water pipe and the inner walls of the water inlet and steam outlet, both gaps connecting to the inner cavity of the inner core to form an emergency vent.

[0007] Optionally, the lifting unit includes a guide rail and a screw elevator; the guide rail is vertically mounted on the support, and the hanger is slidably connected to the guide rail in the vertical direction; multiple heat exchange units are provided, and the multiple heat exchange units are fixedly mounted on the hanger in parallel intervals along the width direction of the melting channel; the screw elevator is fixedly mounted on the support; the screw elevator is used to drive the hanger to slide along the guide rail.

[0008] Optionally, the support is further provided with a cleaning unit, and there are multiple sets of cleaning units. Each set of cleaning units is arranged between two adjacent heat exchange units. The cleaning unit includes a frame and two scrapers. The frame is fixedly arranged on the support, and the two scrapers are mirror-arranged on the frame. The two scrapers abut against the shells of two adjacent heat exchange units respectively.

[0009] Optionally, a central shaft is rotatably connected to the bottom of the frame, and the rotation axis of the central shaft is set along the length of the melt channel; the scraper is rotatably connected to the central shaft, and the rotation axis of the scraper is set along the length of the central shaft; the frame is also provided with a limiting component for restricting the rotation of the scraper.

[0010] Optionally, the limiting assembly includes a screw, a nut sleeve, a connecting rod, and a crank; the nut sleeve is fixedly mounted on the frame, and the screw passes through the nut sleeve in a vertical direction; the connecting rod is rotatably connected below the screw, one end of the crank is rotatably connected to the connecting rod, and the other end is rotatably connected to the scraper.

[0011] Optionally, the interlayer between the shell and the inner core is filled with a lead-bismuth alloy.

[0012] Optionally, a gap is left between the copper water pipe and the inner wall of the air inlet and steam outlet, and both gaps are connected to the inner cavity of the inner core to form an emergency vent.

[0013] In summary, this application includes the following beneficial technical effects:

[0014] This application, through the setting of heat exchange unit and lifting unit, allows the heat exchange unit to be inserted into the melting channel when the high-temperature molten material flows through the melting channel. The heat of the molten material is used to heat the water in the water pipe, which is eventually vaporized into water vapor and discharged into the boiler steam system through the other end. This waste heat utilization process can be continuously continued with the replenishment of water, and finally produces qualified saturated steam that meets industrial use, thereby improving the resource recovery and utilization capacity. Attached Figure Description

[0015] Figure 1 This is an overall structural diagram of the high-temperature melt waste heat recovery and cleaning device of this application;

[0016] Figure 2 yes Figure 1 Overall structural diagram of the heat exchange unit;

[0017] Figure 3 yes Figure 2 Overall structural cross-sectional view of the heat exchange unit

[0018] Figure 4 yes Figure 1 Overall structural diagram of the cleaning unit;

[0019] Figure 5 yes Figure 4 Overall structural diagram of the middle limit component.

[0020] Explanation of reference numerals in the attached figures:

[0021] 1. Support frame; 11. Hanger; 2. Heat exchange unit; 21. Shell; 22. Inner core; 23. Water pipe; 24. Water inlet; 25. Steam outlet; 26. Emergency vent; 27. Lead-bismuth alloy; 3. Lifting unit; 31. Guide rail; 32. Screw elevator; 4. Cleaning unit; 41. Frame; 42. Central shaft; 43. Scraper; 5. Limiting assembly; 51. Screw; 52. Nut sleeve; 53. Connecting rod; 54. Crank; 6. Melting channel. Detailed Implementation

[0022] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0023] This application discloses a lifting-type high-temperature melt waste heat recovery and cleaning device. The device includes a support 1 installed above a melting channel 6. A guide rail 31 is provided on the support 1 along the vertical direction. A hanger 11 is slidably connected to the guide rail 31. Multiple heat exchange units 2 are spaced apart on the hanger 11 along the width direction of the melting channel 6. A lifting unit 3 for driving the hanger 11 to slide is also provided on the support 1. The heat exchange unit 2 includes a shell 21 and an inner core 22. The inner core 22 is installed in the shell 21. The inner core 22 has an inner cavity, in which a water pipe 23 is coiled. The shell 21 and the inner core 22 are provided with a water inlet 24 and a steam outlet 25. One end of the water pipe 23 is connected to a water supply system from the water inlet 24, and the other end is connected to a steam system through the steam outlet 25.

[0024] At the start of heat exchange, driven by the lifting unit 3, heat exchange unit 2 is slowly inserted into the high-temperature melt from above the melting channel 6 until the entire shell 21 is completely submerged in the high-temperature melt. At this time, there is still a gap of about 100mm between the bottom of the shell 21 and the bottom of the melting channel 6 to ensure the normal flow of the melt. Water introduced into the inner core 22 from the outside is fully heated in the S-shaped water pipe 23 and eventually vaporized into water vapor, which is discharged into the boiler steam system through the other end of the water pipe 23. This waste heat utilization process can continue as water is replenished, ultimately producing qualified saturated steam that meets industrial needs.

[0025] To prevent an explosion caused by excessive internal pressure due to water vapor leakage during heat exchange, a gap is left between the water pipe 23 and the inner wall of the air inlet and steam outlet 25. Both gaps are connected to the inner cavity of the inner core 22 to form an emergency exhaust port 26, which can be directly connected to the atmosphere along the internal channel of the support 1.

[0026] To increase heat exchange efficiency, multiple heat exchange units 2 are arranged parallel to each other along the width of the melting channel 6. All heat exchange units 2 are fixedly connected to the hanger 11. In this embodiment, four sets of heat exchange units 2 are provided. In actual practice, the number of heat exchange units 2 mounted on the hanger 11 can be changed according to the actual flow rate.

[0027] In this embodiment, the lifting unit 3 includes a guide rail 31 and a screw 51 lifting mechanism 32; the guide rail 31 is vertically mounted on the support 1, and the hanger 11 is slidably connected to the guide rail 31; the screw 51 lifting mechanism 32 is fixedly mounted on the support 1 and is used to drive the hanger 11 to rise and fall.

[0028] Since solid slag is often present in the high-temperature melt, a thick slag layer will form on the surface of the heat exchange unit 2 after long-term operation, which will hinder the normal flow of the high-temperature melt and also affect the overall heat exchange efficiency of the device. Therefore, this application also provides a cleaning unit 4 on the support 1. There are multiple sets of cleaning units 4, and each set of cleaning units 4 is set between two adjacent heat exchange units 2. The cleaning unit 4 includes a frame 41 and two scrapers 43. The frame 41 is fixedly set on the support 1, and the two scrapers 43 are mirror-set on the frame 41 along the vertical plane. The two scrapers 43 respectively abut against the shell 21 of the two adjacent heat exchange units 2. When the lifting unit 3 drives the heat exchange unit 2 to slide up and down, the scraper 43 slides relative to the shell 21, thereby scraping off the slag layer on the shell 21.

[0029] Considering that the number of heat exchange units 2 on the hanger 11 varies in actual situations, the spacing between two adjacent heat exchange units 2 will also vary. Therefore, a central shaft 42 is rotatably connected below the frame 41, and the rotation axis of the central shaft 42 is set along the length of the melt channel 6. The scraper 43 is rotatably connected to the central shaft 42, and the rotation axis of the scraper 43 is set along the length of the central shaft 42. The frame 41 is also provided with a limiting component 5 for limiting the rotation of the scraper 43. At this time, the angle of rotation of the scraper 43 can be changed by the limiting component 5, thereby changing the distance between the two scrapers 43 to adapt to the spacing of heat exchange units 2 with different numbers.

[0030] If the heat exchange unit 2 is made of different materials, has different melt composition, or has different working time, the thickness of the attached residue will be different. The above technical solution makes the spacing of the scraper 43 adjustable, which also allows the device to be used in different working conditions to better remove residue.

[0031] In this embodiment, the limiting component 5 includes a screw 51, a nut sleeve 52, a connecting rod 53, and a crank 54. The nut sleeve 52 is fixedly mounted on the frame 41, and the screw 51 is threaded through the nut sleeve 52 in the vertical direction. The connecting rod 53 is rotatably connected to the screw 51, and a nut is provided below the screw 51 to limit the position of the connecting rod 53 on the screw 51, so that the connecting rod 53 can only rise and fall together with the screw 51. One end of the crank 54 is rotatably connected to the connecting rod 53, and the other end is rotatably connected to the scraper 43.

[0032] Rotating the screw 51 drives the connecting rod 53 to move up and down in the vertical direction, thereby opening or closing the two scrapers 43 and changing the distance between the two scrapers 43 to adapt to the distance between the heat exchange units 2. After the cleaning operation is completed, the heat exchange unit 220 is reinserted into the high-temperature melt to continue the heat exchange operation until the next periodic cleaning.

[0033] Furthermore, the interlayer between the shell 21 and the inner core 22 is filled with a lead-bismuth alloy 27; the lead-bismuth alloy 27 has the characteristics of low melting point, high boiling point, high thermal conductivity, and good thermal stability. When the heat exchange unit 2 is removed from the high-temperature melt for cleaning, the good thermal stability of the lead-bismuth alloy 27 ensures that the interior of the heat exchange unit 2 maintains a temperature similar to that inside the high-temperature melt. Therefore, the slag layer on the surface of the shell 21 slows down its cooling and hardening trend due to the continuous high temperature inside, thereby effectively reducing the working resistance of the scraper 43, reducing the power loss of the lifting unit 3, and extending the service life of the scraper 43.

[0034] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A lifting-type high-temperature melt waste heat recovery and cleaning device, characterized in that: The device includes a support frame positioned above a melting channel; a hanger slidably connected to the support frame in a vertical direction, and a heat exchange unit mounted on the hanger, which slides to enter or exit the melting channel; the heat exchange unit includes a shell and an inner core, with the inner core disposed within the shell and forming a sandwich; a water inlet and a steam outlet are provided on the shell and the inner core; a coiled water pipe is located within the inner cavity of the inner core, with one end of the water pipe connected to a water supply system via the water inlet and the other end connected to a steam system via the steam outlet; a lifting unit is also provided on the support frame to drive the hanger to slide; the sandwich between the shell and the inner core is filled with a lead-bismuth alloy; gaps are left between the water pipe and the inner walls of the water inlet and steam outlet, both gaps connecting to the inner cavity of the inner core to form emergency venting holes.

2. The lifting-type high-temperature melt waste heat recovery and cleaning device according to claim 1, characterized in that: The lifting unit includes a guide rail and a screw elevator; the guide rail is vertically mounted on the support, and the hanger is slidably connected to the guide rail in the vertical direction; multiple heat exchange units are provided, and the multiple heat exchange units are fixedly mounted on the hanger in parallel intervals along the width direction of the melting channel; the screw elevator is fixedly mounted on the support; the screw elevator is used to drive the hanger to slide along the guide rail.

3. The lifting-type high-temperature melt waste heat recovery and cleaning device according to claim 2, characterized in that: The support is also equipped with a cleaning unit, and there are multiple sets of cleaning units. Each set of cleaning units is located between two adjacent heat exchange units. The cleaning unit includes a frame and two scrapers. The frame is fixedly mounted on the support, and the two scrapers are mirror-mounted on the frame. The two scrapers abut against the shells of two adjacent heat exchange units respectively.

4. The lifting-type high-temperature melt waste heat recovery and cleaning device according to claim 3, characterized in that: A central shaft is rotatably connected to the bottom of the frame, and the axis of rotation of the central shaft is set along the length of the melt channel; the scraper is rotatably connected to the central shaft, and the axis of rotation of the scraper is set along the length of the central shaft; the frame is also provided with a limiting component for restricting the rotation of the scraper.

5. The lifting-type high-temperature melt waste heat recovery and cleaning device according to claim 4, characterized in that: The limiting assembly includes a screw, a nut sleeve, a connecting rod, and two cranks; the nut sleeve is fixedly mounted on the frame, and the screw passes through the nut sleeve in a vertical direction; the connecting rod is rotatably connected below the screw, and the two cranks are arranged in a mirror image, with one end of the crank rotatably connected to the connecting rod and the other end rotatably connected to the scraper.

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