A device for energy-saving recovery of the waste heat from the roasting of laterite nickel ore

Abstract

The present invention discloses a device for energy-saving recovery of roasting waste heat of laterite nickel ore, belonging to the technical field of waste heat recovery. It includes a steam boiler, a steam power generation device is installed at the rear side of the steam boiler, a waste heat transfer pipeline is installed at the front end of the steam boiler, a heat conduction structure is sleeved on the waste heat transfer pipeline, the heat conduction structure is composed of a heat conduction base pipe and a heat conduction fin structure, there are six heat conduction fin structures and they are symmetrically installed on the outer wall of the heat conduction base pipe, a waste heat recovery pipeline is installed on the heat conduction structure, the waste heat recovery pipeline is composed of a spiral heating pipeline, a second water inlet pipeline, a water outlet pipeline and a pipeline heat preservation device, the second water inlet pipeline is installed at the front end of the spiral heating pipeline, the water outlet pipeline is installed at the rear end of the spiral heating pipeline. By setting the waste heat recovery pipeline, the heat of the rotary kiln tail gas emitted from the waste heat transfer pipeline can be recovered and utilized, thereby improving the utilization rate of the high-temperature tail gas of the rotary kiln and reducing the waste of heat.

Description

Technical Field

[0001] The present invention relates to the technical field of waste heat recovery, and particularly to an energy-saving waste heat recovery device for roasting laterite nickel ore. Background Art

[0002] The laterite nickel ore roasting kiln refers to the production equipment specifically for producing laterite nickel. Generally, a rotary kiln is used for the laterite nickel ore roasting equipment. With the increasing scarcity of sulfide ore resources, the expansion of nickel production will mainly come from laterite nickel ore. The typical treatment processes of laterite nickel ore are divided into wet process and pyrometallurgical process. The wet process is suitable for treating limonite; the pyrometallurgical process is suitable for treating silicate nickel ore. Laterite nickel ore is typical silicate nickel ore. It is first dried, dehydrated and roasted by a kiln, and then nickel iron is reduced and smelted by an electric furnace.

[0003] The laterite nickel ore roasting rotary kiln consumes a large amount of heat energy during use. A large amount of heat is discharged with the tail gas of the rotary kiln. In order to effectively recycle and utilize resources, it is necessary to recover and utilize the heat energy in the tail gas of the rotary kiln, so as to improve economic benefits and be more energy-saving and environmentally friendly. Most of the traditional methods for recovering waste heat from laterite nickel ore roasting rotary kilns are to send the tail gas with a certain amount of heat into a steam boiler through a pipeline, so as to use the heat in the tail gas to evaporate the water in the boiler to generate steam, and then the steam will enter a steam power generation device through a pipeline to drive the steam power generation device to operate and generate electricity. However, when the high-temperature tail gas of the rotary kiln is sent into the steam boiler through a pipeline, a large amount of heat will be dissipated from the pipeline, resulting in waste of heat, and thus reducing the utilization rate of the high-temperature tail gas of the rotary kiln. Therefore, an efficient energy-saving waste heat recovery device for laterite nickel ore roasting is needed. Summary of the Invention

[0004] The main purpose of the present invention is to provide an energy-saving waste heat recovery device for laterite nickel ore roasting, which can effectively solve the problems in the background art.

[0005] To achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0006] A device for energy-saving recovery of roasting waste heat from laterite nickel ore, comprising a steam boiler. A steam power generation device is installed at the rear side of the steam boiler. A waste heat transfer pipeline is installed at the front end of the steam boiler. A heat conduction structure is sleeved on the waste heat transfer pipeline. The heat conduction structure is composed of a heat conduction base pipe and a heat conduction fin structure. There are six heat conduction fin structures symmetrically installed on the outer wall of the heat conduction base pipe. A waste heat recovery pipeline is installed on the heat conduction structure. The waste heat recovery pipeline is composed of a spiral heating pipeline, a second water inlet pipeline, a water outlet pipeline and a pipeline heat preservation device. The second water inlet pipeline is installed at the front end of the spiral heating pipeline. The water outlet pipeline is installed at the rear end of the spiral heating pipeline. The pipeline heat preservation device is sleeved on the water outlet pipeline. A support structure is installed on each of the six heat conduction fin structures. The support structure can move in and out on the heat conduction fin structure. The support structure is composed of a mounting substrate, a protective rubber strip and a spring guide post. The protective rubber strip is installed at the outer end of the mounting substrate. There are several spring guide posts symmetrically installed at the inner end of the mounting substrate. A buffer spring is sleeved on the spring guide post. An insulating protection pipeline is sleeved on the outer sides of the six support structures. The insulating protection pipeline is composed of a protective outer pipe, a protective inner pipe, a heat preservation layer structure and a sealing rubber gasket. The heat preservation layer structure is sleeved on the protective inner pipe. The protective outer pipe is sleeved on the heat preservation layer structure. There are two sealing rubber gaskets symmetrically installed in the protective outer pipe, the protective inner pipe and the heat preservation layer structure.

[0007] Further, four support leg structures are symmetrically installed on the outer wall of the steam boiler. A support bottom plate is installed at the lower ends of the four support leg structures. The support leg structures are fixedly installed together with the steam boiler and the support bottom plate by welding. A first water inlet pipeline is installed on the outer wall of the steam boiler. The first water inlet pipeline is fixedly connected with the steam boiler. The first water inlet pipeline is connected to a water supply device arranged outside through a pipeline.

[0008] Further, a support base is installed at the lower end of the steam power generation device. The steam power generation device is fixedly installed together with the support base by welding. A steam transfer pipeline is fixedly installed at the front end of the steam power generation device. The other end of the steam transfer pipeline is fixedly connected with the steam boiler.

[0009] Further, the waste heat transfer pipeline is fixedly installed at the front end of the steam boiler. A filtering device is fixedly installed in the waste heat transfer pipeline. The front end of the waste heat transfer pipeline is fixedly connected with the exhaust port of a rotary kiln.

[0010] Furthermore, the heat-conducting base pipe on the heat-conducting structure is in close contact with the outer wall of the waste heat transfer pipeline. The heat-conducting base pipe and the six heat-conducting fin structures symmetrically installed at its outer end are fixedly connected. A number of fixing through holes are provided on each of the six heat-conducting fin structures, and a number of mounting blind holes are symmetrically provided at the outer ends of the six heat-conducting fin structures.

[0011] Furthermore, the second water inlet pipe on the waste heat recovery pipeline and the spiral heating pipeline are fixedly installed together by welding. The spiral heating pipeline and the water outlet pipe are fixedly installed together by welding. The second water inlet pipe is connected to a water supply device arranged outside through a pipeline. The spiral heating pipeline is in contact with the outer wall of the heat-conducting base pipe on the heat-conducting structure. The spiral heating pipeline is installed in a number of fixing through holes provided on the six heat-conducting fin structures. The spiral heating pipeline and the six heat-conducting fin structures are fixedly connected. The water outlet pipe is fixedly connected to the first water inlet pipe installed on the outer wall of the steam boiler.

[0012] Furthermore, the mounting substrate and the protective rubber strip on the support structure are fixedly installed together by adhesive. The protective rubber strip is in contact with the inner wall of the protective inner pipe on the heat insulation and protection pipeline. The mounting substrate and the spring guide posts symmetrically installed at its inner end are of an integrally formed structure. The spring guide posts are inserted into the mounting blind holes provided at the outer ends of the heat-conducting fin structures.

[0013] Furthermore, the buffer spring is located between the heat-conducting fin structure and the mounting substrate. The buffer spring is fixedly connected to the heat-conducting fin structure and the mounting substrate respectively by welding.

[0014] Furthermore, the protective outer pipe, the protective inner pipe and the thermal insulation layer structure on the heat insulation and protection pipeline are all fixedly connected. Two first through holes are symmetrically provided on the protective outer pipe. The first through holes penetrate through the inner wall and the outer wall of the protective outer pipe. Two second through holes are symmetrically provided on the thermal insulation layer structure. The second through holes penetrate through the inner wall and the outer wall of the thermal insulation layer structure. Two third through holes are symmetrically provided on the protective inner pipe. The third through holes penetrate through the inner wall and the outer wall of the protective inner pipe. A fourth through hole is provided on the sealing rubber pad. The fourth through hole penetrates through the inner wall and the outer wall of the sealing rubber pad. The sealing rubber pad is fixedly installed in the first through holes, the third through holes and the second through holes provided on the protective outer pipe, the protective inner pipe and the thermal insulation layer structure.

[0015] Furthermore, the second water inlet pipe on the waste heat recovery pipeline passes through the fourth through hole provided on the sealing rubber pad at the front side. The water outlet pipe passes through the fourth through hole provided on the sealing rubber pad at the rear side. The pipeline heat insulation device is located outside the heat insulation and protection pipeline.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] (1) By setting up the waste heat recovery pipeline, the heat of the rotary kiln tail gas emitted from the waste heat transmission pipeline can be recovered and utilized, thereby improving the utilization rate of the high-temperature tail gas of the rotary kiln and reducing heat waste. When the high-temperature tail gas of the rotary kiln emits from the waste heat transmission pipeline, the waste heat recovery pipeline can be heated, and then the water flowing through the waste heat recovery pipeline can be heated. Finally, the heated water will be transported to the steam boiler, ultimately reducing heat waste while also preheating the water entering the steam boiler;

[0018] (2) By setting up the heat conduction structure, it is convenient to quickly conduct the heat emitted from the waste heat transmission pipeline to the waste heat recovery pipeline;

[0019] (3) By setting up the heat insulation protection pipeline, heat loss to the outside can be reduced;

[0020] (4) By setting up the support structure and buffer springs, the heat insulation protection pipeline can be supported, and at the same time, it can avoid the heat insulation protection pipeline from colliding with the heat conduction structure, ultimately reducing the probability of damage to the heat insulation protection pipeline and the heat conduction structure. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0022] Figure 2 is of the present invention Figure 1 an enlarged view of part A;

[0023] Figure 3 is a schematic diagram of the positional relationship structure between the heat conduction structure and the waste heat recovery pipeline of the present invention;

[0024] Figure 4 is of the present invention Figure 3 an enlarged view of part B;

[0025] Figure 5 is a schematic diagram of the support structure and buffer springs of the present invention;

[0026] Figure 6 is of the present invention Figure 5 an enlarged view of part C;

[0027] Figure 7 is a cross-sectional view of the heat insulation protection pipeline of the present invention;

[0028] Figure 8 is of the present invention Figure 7 an enlarged view of part D.

[0029] In the figure: 1. Steam boiler; 2. Steam power generation equipment; 3. Waste heat transfer pipeline; 4. Heat conduction structure; 5. Waste heat recovery pipeline; 6. Support structure; 7. Buffer spring; 8. Heat insulation protection pipeline; 9. Support leg structure; 10. Support bottom plate; 11. First water inlet pipeline; 12. Support base; 13. Steam transmission pipeline; 14. Heat conduction base pipe; 15. Heat conduction fin structure; 16. Fixed through hole; 17. Installation blind hole; 18. Spiral heating pipeline; 19. Second water inlet pipeline; 20. Outlet pipeline; 21. Pipeline heat insulation device; 22. Installation substrate; 23. Protective rubber strip; 24. Spring guide post; 25. Protective outer pipe; 26. Protective inner pipe; 27. Heat insulation layer structure; 28. First through hole; 29. Second through hole; 30. Third through hole; 31. Sealing rubber pad; 32. Fourth through hole. Detailed implementation manners

[0030] To make the technical means, creative features, achieved purposes and functions of the present invention easy to understand, the present invention will be further described below in conjunction with specific implementation manners.

[0031] Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 As shown in the figures, a device for energy-saving recovery of waste heat from roasting laterite nickel ore includes a steam boiler 1. Four support leg structures 9 are symmetrically installed on the outer wall of the steam boiler 1. A support bottom plate 10 is installed at the lower ends of the four support leg structures 9. The support leg structures 9 are fixedly installed with the steam boiler 1 and the support bottom plate 10 by welding. A first water inlet pipeline 11 is installed on the outer wall of the steam boiler 1. The first water inlet pipeline 11 is fixedly connected with the steam boiler 1. The first water inlet pipeline 11 is connected to a water supply device arranged outside through a pipeline. A steam power generation equipment 2 is installed at the rear of the steam boiler 1. A support base 12 is installed at the lower end of the steam power generation equipment 2. The steam power generation equipment 2 is fixedly installed with the support base 12 by welding. A steam transmission pipeline 13 is fixedly installed at the front end of the steam power generation equipment 2. The other end of the steam transmission pipeline 13 is fixedly connected with the steam boiler 1. A waste heat transfer pipeline 3 is installed at the front end of the steam boiler 1. The waste heat transfer pipeline 3 is fixedly installed at the front end of the steam boiler 1. A filtering device is fixedly installed in the waste heat transfer pipeline 3. The front end of the waste heat transfer pipeline 3 is fixedly connected with the exhaust port of the rotary kiln.

[0032] Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 ,Figure 7 、 Figure 8As shown, a heat conduction structure 4 is sleeved on the waste heat transfer pipeline 3. The heat conduction structure 4 is composed of a heat conduction base pipe 14 and a heat conduction fin structure 15. There are six heat conduction fin structures 15, which are symmetrically installed on the outer wall of the heat conduction base pipe 14. The heat conduction base pipe 14 on the heat conduction structure 4 is in close contact with the outer wall of the waste heat transfer pipeline 3. The heat conduction base pipe 14 and the six heat conduction fin structures 15 symmetrically installed at its outer end are fixedly connected. A number of fixing through holes 16 are provided on each of the six heat conduction fin structures 15, and a number of installation blind holes 17 are symmetrically provided at the outer ends of the six heat conduction fin structures 15. A waste heat recovery pipeline 5 is installed on the heat conduction structure 4. The waste heat recovery pipeline 5 is composed of a spiral heating pipeline 18, a second water inlet pipeline 19, a water outlet pipeline 20 and a pipeline heat preservation device 21. The second water inlet pipeline 19 is installed at the front end of the spiral heating pipeline 18, and the water outlet pipeline 20 is installed at the rear end of the spiral heating pipeline 18. The pipeline heat preservation device 21 is sleeved on the water outlet pipeline 20. The second water inlet pipeline 19 on the waste heat recovery pipeline 5 and the spiral heating pipeline 18 are fixedly installed together by welding. The spiral heating pipeline 18 and the water outlet pipeline 20 are fixedly installed together by welding. The second water inlet pipeline 19 is connected to a water supply device arranged outside through a pipeline. The spiral heating pipeline 18 is in contact with the outer wall of the heat conduction base pipe 14 on the heat conduction structure 4. The spiral heating pipeline 18 is installed in a number of fixing through holes 16 provided on the six heat conduction fin structures 15. The spiral heating pipeline 18 and the six heat conduction fin structures 15 are fixedly connected. The water outlet pipeline 20 is fixedly connected to a first water inlet pipeline 11 installed on the outer wall of the steam boiler 1. A support structure 6 is installed on each of the six heat conduction fin structures 15. The support structure 6 can move in and out on the heat conduction fin structure 15. The support structure 6 is composed of an installation base plate 22, a protective rubber strip 23 and a spring guide post 24. The protective rubber strip 23 is installed at the outer end of the installation base plate 22. A number of spring guide posts 24 are symmetrically installed at the inner end of the installation base plate 22. The installation base plate 22 and the protective rubber strip 23 on the support structure 6 are fixedly installed together by glue. The protective rubber strip 23 is in contact with the inner wall of the protective inner pipe 26 on the heat insulation protection pipeline 8. The installation base plate 22 and the spring guide posts 24 symmetrically installed at its inner end are integrally formed structures. The spring guide posts 24 are inserted into the installation blind holes 17 provided at the outer ends of the heat conduction fin structures 15. A buffer spring 7 is sleeved on the spring guide posts 24. The buffer spring 7 is located between the heat conduction fin structure 15 and the installation base plate 22. The buffer spring 7 is fixedly connected to the heat conduction fin structure 15 and the installation base plate 22 respectively by welding. An insulating protection pipeline 8 is sleeved outside the six support structures 6. The insulating protection pipeline 8 is composed of a protective outer pipe 25, a protective inner pipe 26, a heat preservation layer structure 27 and a sealing rubber pad 31. The heat preservation layer structure 27 is sleeved on the protective inner pipe 26. The protective outer pipe 25 is sleeved on the heat preservation layer structure 27. There are two sealing rubber pads 31, which are symmetrically installed in the protective outer pipe 25, the protective inner pipe 26 and the heat preservation layer structure 27.The protective outer pipe 25, the protective inner pipe 26, and the thermal insulation layer structure 27 on the heat-insulating protection pipe 8 are all fixedly connected. Two first through holes 28 are symmetrically opened on the protective outer pipe 25, and the first through holes 28 penetrate through the inner wall and the outer wall of the protective outer pipe 25. Two second through holes 29 are symmetrically opened on the thermal insulation layer structure 27, and the second through holes 29 penetrate through the inner wall and the outer wall of the thermal insulation layer structure 27. Two third through holes 30 are symmetrically opened on the protective inner pipe 26, and the third through holes 30 penetrate through the inner wall and the outer wall of the protective inner pipe 26. A fourth through hole 32 is opened on the sealing rubber pad 31, and the fourth through hole 32 penetrates through the inner wall and the outer wall of the sealing rubber pad 31. The sealing rubber pad 31 is fixedly installed in the first through hole 28, the third through hole 30, and the second through hole 29 opened on the protective outer pipe 25, the protective inner pipe 26, and the thermal insulation layer structure 27. The second water inlet pipe 19 on the waste heat recovery pipe 5 passes through the fourth through hole 32 opened on the front sealing rubber pad 31, and the water outlet pipe 20 passes through the fourth through hole 32 opened on the rear sealing rubber pad 31. The pipe heat insulation device 21 is located outside the heat-insulating protection pipe 8. By setting the waste heat recovery pipe 5, the heat of the rotary kiln tail gas emitted from the waste heat conveying pipe 3 can be recovered and utilized, so that the utilization rate of the high-temperature rotary kiln tail gas can be improved, heat waste can be reduced. When the high-temperature rotary kiln tail gas emits from the waste heat conveying pipe 3, the waste heat recovery pipe 5 can be heated, and then the water flowing through the waste heat recovery pipe 5 can be heated. Finally, the heated water will be conveyed to the steam boiler 1. Finally, while reducing heat waste, the water entering the steam boiler 1 is preheated. By setting the heat conduction structure 4, the heat emitted from the waste heat conveying pipe 3 can be conveniently conducted to the waste heat recovery pipe 5 quickly. By setting the heat-insulating protection pipe 8, heat loss to the outside can be reduced. By setting the support structure 6 and the buffer spring 7, the heat-insulating protection pipe 8 can be supported, and at the same time, the heat-insulating protection pipe 8 can be prevented from colliding with the heat conduction structure 4. Finally, the probability of damage to the heat-insulating protection pipe 8 and the heat conduction structure 4 can be reduced.,

[0033] It should be noted that the present invention is a device for energy-saving recovery of waste heat from roasting laterite nickel ore. When in use, the high-temperature tail gas of the rotary kiln enters the steam boiler 1 through the waste heat transfer pipeline 3. At the same time, the externally provided water supply equipment sends water into the steam boiler 1 through the pipeline and the first water inlet pipeline 11. At this time, the high-temperature tail gas entering the steam boiler 1 heats the water entering the steam boiler 1, so that the water is evaporated, and then high-temperature steam is generated. Then, the high-temperature steam enters the steam power generation equipment 2 through the steam transfer pipeline 13, and finally the high-temperature steam can drive the steam power generation equipment 2 to work and generate electricity. When the high-temperature tail gas passes through the waste heat transfer pipeline 3, some heat will dissipate. At this time, the dissipated heat is conducted by the heat conduction structure 4 to the waste heat recovery pipeline 5, and then the spiral heating pipeline 18 on the waste heat recovery pipeline 5 is heated. At the same time, the externally provided water supply equipment sends water into the spiral heating pipeline 18 through the pipeline and the second water inlet pipeline 19. At this time, the water flowing through the spiral heating pipeline 18 is heated, and finally the heated water enters the first water inlet pipeline 11 through the water outlet pipeline 20, and finally enters the steam boiler 1 together with the water in the first water inlet pipeline 11, ultimately improving the utilization rate of the high-temperature tail gas. The existence of the heat insulation protection pipeline 8 can reduce the outward diffusion and loss of heat. When the heat insulation protection pipeline 8 is collided, it will squeeze the support structure 6, and then the support structure 6 will compress the buffer spring 7. During this process, the impact force on the heat insulation protection pipeline 8 can be buffered, which can avoid the collision between the heat insulation protection pipeline 8 and the heat conduction structure 4 and at the same time reduce the probability of damage to the heat insulation protection pipeline 8 and the heat conduction structure 4.

[0034] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention. The protection scope required by the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for energy-saving recovery of roasted residual heat from laterite nickel ore, comprising a steam boiler (1). A steam power generation device (2) is installed at the rear side of the steam boiler (1), and a residual heat transfer pipeline (3) is installed at the front end of the steam boiler (1). Characterized in that: A heat conduction structure (4) is sleeved on the waste heat transfer pipeline (3). The heat conduction structure (4) is composed of a heat conduction base pipe (14) and a heat conduction fin structure (15). There are six heat conduction fin structures (15) which are symmetrically installed on the outer wall of the heat conduction base pipe (14). A waste heat recovery pipeline (5) is installed on the heat conduction structure (4). The waste heat recovery pipeline (5) is composed of a spiral heating pipeline (18), a second water inlet pipeline (19), a water outlet pipeline (20) and a pipeline heat preservation device (21). The second water inlet pipeline (19) is installed at the front end of the spiral heating pipeline (18). The water outlet pipeline (20) is installed at the rear end of the spiral heating pipeline (18). The pipeline heat preservation device (21) is sleeved on the water outlet pipeline (20). A support structure (6) is installed on each of the six heat conduction fin structures (15). The support structure (6) can move in and out on the heat conduction fin structure (15). The support structure (6) is composed of a mounting substrate (22), a protective rubber strip (23) and a spring guide post (24). The protective rubber strip (23) is installed at the outer end of the mounting substrate (22). There are several spring guide posts (24) which are symmetrically installed at the inner end of the mounting substrate (22). A buffer spring (7) is sleeved on the spring guide post (24). An insulating protection pipeline (8) is sleeved on the outer sides of the six support structures (6). The insulating protection pipeline (8) is composed of a protective outer pipe (25), a protective inner pipe (26), a heat preservation layer structure (27) and a sealing rubber pad (31). The heat preservation layer structure (27) is sleeved on the protective inner pipe (26). The protective outer pipe (25) is sleeved on the heat preservation layer structure (27). There are two sealing rubber pads (31) which are symmetrically installed in the protective outer pipe (25), the protective inner pipe (26) and the heat preservation layer structure (27). A first water inlet pipeline (11) is installed on the outer wall of the steam boiler (1). The heat conduction base pipe (14) on the heat conduction structure (4) is in close contact with the outer wall of the waste heat transfer pipeline (3). The heat conduction base pipe (14) and the six heat conduction fin structures (15) symmetrically installed at its outer end are fixedly connected. A number of fixing through holes (16) are formed in each of the six heat conduction fin structures (15). A number of mounting blind holes (17) are symmetrically formed at the outer ends of the six heat conduction fin structures (15). The second water inlet pipeline (19) on the waste heat recovery pipeline (5) and the spiral heating pipeline (18) are fixedly installed together by welding. The spiral heating pipeline (18) and the water outlet pipeline (20) are fixedly installed together by welding. The second water inlet pipeline (19) is connected to a water supply device arranged outside through a pipeline. The spiral heating pipeline (18) is in contact with the outer wall of the heat conduction base pipe (14) on the heat conduction structure (4). The spiral heating pipeline (18) is installed in a number of fixing through holes (16) formed in the six heat conduction fin structures (15). The spiral heating pipeline (18) and the six heat conduction fin structures (15) are all fixedly connected.The described water outlet pipe (20) is fixedly connected to the first water inlet pipe (11) installed on the outer wall of the steam boiler (1). The mounting substrate (22) and the protective rubber strip (23) on the support structure (6) are fixedly installed together by adhesive. The protective rubber strip (23) is in contact with the inner wall of the protective inner pipe (26) on the heat insulation and protection pipe (8). The mounting substrate (22) and the spring guide posts (24) symmetrically installed at its inner end are of an integrally formed structure. The spring guide posts (24) are inserted into the mounting blind holes (17) opened at the outer end of the heat conducting fin structure (15). The buffer spring (7) is located between the heat conducting fin structure (15) and the mounting substrate (22). The buffer spring (7) is fixedly connected to the heat conducting fin structure (15) and the mounting substrate (22) respectively by welding., 2. The device for energy-saving recovery of roasted residual heat from laterite nickel ore according to claim 1, Characterized in that: Four support leg structures (9) are symmetrically installed on the outer wall of the steam boiler (1). A support bottom plate (10) is installed at the lower ends of the four support leg structures (9). The support leg structures (9) are fixedly installed with the steam boiler (1) and the support bottom plate (10) by welding. The first water inlet pipeline (11) is fixedly connected with the steam boiler (1), and the first water inlet pipeline (11) is connected to a water supply device arranged outside through a pipeline.

3. The device for energy-saving recovery of roasted residual heat from laterite nickel ore according to claim 2, Characterized in that: A support base (12) is installed at the lower end of the steam power generation device (2). The steam power generation device (2) is fixedly installed with the support base (12) by welding. A steam transfer pipeline (13) is fixedly installed at the front end of the steam power generation device (2), and the other end of the steam transfer pipeline (13) is fixedly connected with the steam boiler (1).

4. The device for energy-saving recovery of roasted residual heat from laterite nickel ore according to claim 3, Characterized in that: The residual heat transfer pipeline (3) is fixedly installed at the front end of the steam boiler (1). A filtering device is fixedly installed in the residual heat transfer pipeline (3), and the front end of the residual heat transfer pipeline (3) is fixedly connected with the exhaust port of a rotary kiln.

5. The device for energy-saving recovery of roasted residual heat from laterite nickel ore according to claim 4, Characterized in that: The protective outer pipe (25), the protective inner pipe (26) and the thermal insulation layer structure (27) on the heat insulation protection pipeline (8) are all fixedly connected. Two first through holes (28) are symmetrically opened on the protective outer pipe (25). The first through holes (28) penetrate through the inner wall and the outer wall of the protective outer pipe (25). Two second through holes (29) are symmetrically opened on the thermal insulation layer structure (27). The second through holes (29) penetrate through the inner wall and the outer wall of the thermal insulation layer structure (27). Two third through holes (30) are symmetrically opened on the protective inner pipe (26). The third through holes (30) penetrate through the inner wall and the outer wall of the protective inner pipe (26). A fourth through hole (32) is opened on the sealing rubber pad (31). The fourth through hole (32) penetrates through the inner wall and the outer wall of the sealing rubber pad (31). The sealing rubber pad (31) is fixedly installed in the first through holes (28), the third through holes (30) and the second through holes (29) opened on the protective outer pipe (25), the protective inner pipe (26) and the thermal insulation layer structure (27).

6. The device for energy-saving recovery of roasted residual heat from laterite nickel ore according to claim 5, Characterized in that: The second water inlet pipe (19) on the waste heat recovery pipe (5) passes through a fourth through hole (32) opened in the front sealing rubber pad (31), and the water outlet pipe (20) passes through the fourth through hole (32) opened in the rear sealing rubber pad (31). The pipe heat preservation device (21) is located outside the heat insulation protection pipe (8).

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