Melt separation furnace for processing zinc-containing solid waste and extracting zinc

Abstract

The utility model discloses a melt separation furnace for processing zinc-containing solid waste and extracting zinc, which comprises a melt separation furnace body, a waste heat recovery device and a filter, the waste heat recovery device is arranged on the right side of the melt separation furnace body, and the filter is arranged above the waste heat recovery device; the waste heat recovery device further comprises a cooling dust removal device, a cooler, a heat preservation water tank, a preheater and a raw water pipeline. The tail gas dust removal function is added, meanwhile, the waste heat recovery function is added on dust removal equipment, ash in tail gas is reduced, scouring erosion damage of the tail gas to a follow-up device is reduced, and meanwhile waste heat released by the tail gas in the dust removal process is recovered; the preheating device is additionally arranged, the dedusted tail gas is used for preheating gas entering the melt separation furnace, and the refining efficiency of the melt separation furnace is improved; the structure of cooling equipment is improved, the heat exchange area is increased, and the waste heat recovery efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to solid waste recycling technical field especially relates to a kind of melting separation furnaces for treating zinc-containing solid waste zinc extraction. BACKGROUND

[0002] In the recycling process of zinc-containing solid waste, the zinc-containing solid waste material needs to be heated and smelted to separate the zinc and waste residue therefrom. The existing process generally uses a smelting furnace to extract zinc from the zinc-containing solid waste. During the extraction process, how to effectively improve the smelting recovery efficiency and solve the energy-saving and environmental protection problem has always been the key point in the field of solid waste recycling and utilization.

[0003] In the prior art, a melting separation furnace for treating zinc-containing solid waste zinc extraction disclosed in Chinese patent (CN220624939U) includes a melting separation furnace body, a water tank, and a feeding device. A mounting seat is symmetrically provided on the upper end face of the water tank. A treatment tank is provided on the upper end face of the mounting seat. An annular pipe is provided in the treatment tank. A circulating pump is provided between the water tank and the treatment tank. A water suction pipe is provided on the input end of the circulating pump. An exhaust pipe is provided on the upper end face of the melting separation furnace body. The other end of the exhaust pipe is bent by 90° and connected in communication with the treatment tank. An air outlet pipe is provided on the upper end face of the treatment tank. A filter part is provided on the upper end face of the air outlet pipe.

[0004] This method has the following defects: 1. The tail gas is directly introduced into the cooling device for cooling. Since the tail gas contains some high-temperature ash, these ash will erode the cooling pipe over a long period of time and easily adhere to the cooling pipe, causing corrosion and reducing the waste heat recovery efficiency. 2. The gas entering the furnace body is not preheated, which causes the gas to absorb part of the heat used to heat the material after entering the furnace body, resulting in a decrease in the extraction efficiency. 3. The contact area between the annular pipe and the tail gas is small, which results in a low heat recovery efficiency. After a long period of internal circulation, the water temperature in the water tank increases, further reducing the waste heat recovery efficiency.

[0005] Therefore, the present application provides a melting separation furnace for treating zinc-containing solid waste zinc extraction. SUMMARY

[0006] To solve the above technical problems, the utility model discloses a melting separation furnace for treating zinc-containing solid waste zinc extraction. The device increases the function of tail gas dust removal, and increases the waste heat recovery function on the dust removal equipment, reduces the ash in the tail gas, reduces the erosion damage of the tail gas to the subsequent device, and recovers the waste heat released in the dust removal process. A preheating device is added to preheat the gas entering the melting separation furnace using the dust-removed tail gas, which improves the extraction efficiency of the melting separation furnace. The structure of the cooling equipment is improved to increase the heat exchange area and improve the waste heat recovery efficiency.

[0007] In order to achieve the above technical effects, the utility model provides a kind of processing zinc-containing solid waste zinc extraction's melting separation furnace, including melting separation furnace body, waste heat recovery device, filter, waste heat recovery device is set in melting separation furnace body right side, filter is set in waste heat recovery device top;The waste heat recovery device further includes cooling dust removal device, cooler, heat preservation water tank, preheater, raw water pipeline, cooling dust removal device is set in melting separation furnace body right side and with the left side import of cooling dust removal device and the upper outlet of melting separation furnace body between through pipeline connection, cooler is set in cooling dust removal device right side and cooling dust removal device top outlet and the left side import of cooler are directly connected by pipeline, heat preservation water tank is set in cooler right side and the right side import of heat preservation water tank and the lower outlet of cooling dust removal device, the lower outlet of cooler between through pipeline connection, preheater is set in cooling dust removal device left side and preheater left side import and melting separation path body gas pipeline between through pipeline connection, preheater right side outlet and melting separation furnace left side gas inlet between through pipeline connection, raw water pipeline is set in cooler rear and raw water pipeline and cooling dust removal device top import, cooler top import between through pipeline connection.

[0008] As preferred, the cooling dust removal device further includes a cyclone dust collector, a cooling device a and an outer shell a, the cooling device a is arranged outside the cyclone dust collector, and the outer shell a is arranged outside the cooling device a.

[0009] As preferred, the cooling device a further includes an annular upper header tank, an annular lower header tank, vertical heat exchange pipes and horizontal heat exchange pipes, the annular upper header tank is arranged above the cyclone dust collector, the annular lower header tank is arranged below the annular upper header tank, the vertical heat exchange pipes are arranged between the annular upper header tank and the annular lower header tank, and the horizontal heat exchange pipes are arranged between the vertical heat exchange pipes on both sides of the pipeline near the rear inlet of the cyclone dust collector.

[0010] As preferred, the cooler further includes an air inlet, an outer shell b and a cooling device b, the air inlet is arranged on the left side of the outer shell b, and the cooling device b is arranged inside the outer shell b.

[0011] As preferred, the cooling device b further includes a header tank a, a header tank b, heat exchange coils and annular fins, the header tank a is arranged behind the right side of the left air inlet of the cooler and connected by a pipeline between the top inlet of the header tank a and the raw water pipeline, the header tank b is arranged below the right air outlet of the cooler and connected by a pipeline between the left inlet of the header tank b and the lower outlet of the cooling dust removal device, the heat exchange coils are arranged on the right side of the header tank a and the header tank b, the inlet of the heat exchange coils is connected with the right outlet of the header tank a, the outlet of the heat exchange coils is connected with the rear inlet of the header tank b, and the annular fins are arranged on the straight section of the heat exchange coils.

[0012] As preferred, the cooling device b further comprises a header tank c, a header tank d, a connecting pipe and a heat conduction plate, the header tank c is arranged above the inner side of the shell a, the header tank d is arranged below the inner side of the shell b, the connecting pipe is arranged between the header tank c and the header tank d, and the heat conduction plate is arranged outside the connecting pipe.

[0013] As preferred, the preheater further comprises a shell c, a cavity a and a cavity b, the cavity a is arranged above the inner side of the shell c and connected with the upper outlet pipeline of the cooling dust collector through a pipeline, the cavity b is arranged below the inner side of the shell c and connected with the upper outlet pipeline of the cooler through a pipeline, and the cavity a and the cavity b are connected through a gas guide pipe.

[0014] As preferred, a circulating pump group is arranged on the raw water pipeline to provide circulating power for the cooling water of the waste heat recovery device.

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

[0016] The device increases the cooling dust collector before waste heat recovery, reduces the ash in the tail gas, reduces the erosion damage of the tail gas to the subsequent device, recovers the waste heat released by the tail gas in the dust removal process, sets the preheater using the dust-removed tail gas to preheat the gas, uses the dust-removed tail gas to preheat the gas entering the melting furnace, improves the refining efficiency of the melting furnace, improves the waste heat recovery efficiency by improving the structure of the cooling device b in the cooler, increasing the heat exchange area and increasing the heat preservation water tank for storing hot water. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is the front view of the present application;

[0018] Figure 2 is the isometric view of the present application;

[0019] Figure 3 is the right view of the present application;

[0020] Figure 4 is Figure 3 the cross-sectional view of section a;

[0021] Figure 5 is Figure 4 the partial view of section b;

[0022] Figure 6 is the isometric view of the internal structure of the cooling dust removal device without the shell a of the present application;

[0023] Figure 7 is the rear view of the internal structure of the cooling dust removal device without the shell a of the present application;

[0024] Figure 8 This is a schematic diagram of the internal structure of the cooler in Example 1 of the present utility model without the outer shell b;

[0025] Figure 9 This is a schematic diagram of the internal structure of the cooler in Example 2 of the present utility model without the outer shell b;

[0026] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0027] 1. Melting furnace body; 2. Filter; 3. Cooling and dust removal device; 4. Cooler; 5. Insulated water tank; 6. Preheater; 7. Raw water pipeline; 8. Cyclone dust collector; 9. Shell a; 10. Annular upper header; 11. Annular lower header; 12. Vertical heat exchange tubes; 13. Horizontal heat exchange tubes; 14. Air inlet scoop; 15. Shell b; 16. Header a; 17. Header b; 18. Heat exchange coil; 19. Annular fin; 20. Header c; 21. Header d; 22. Connecting pipe; 23. Heat conduction plate; 24. Shell c; 25. Cavity a; 26. Cavity b; 27. Air guide pipe; 28. Circulation pump group. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present invention.

[0029] like Figures 1 to 9 As shown, the prior art in this embodiment has the following problems: The inventors have discovered that the prior art has the following defects: First, the tail gas is directly passed into the cooling device for cooling. Since the tail gas contains some high-temperature ash, these ash flushes the cooling pipe for a long time and easily adheres to the cooling pipe, causing erosion and reducing the waste heat recovery efficiency; Second, the gas entering the furnace body is not preheated, resulting in the gas absorbing part of the heat used to heat the material after entering the furnace body, resulting in reduced refining efficiency; Third, the contact area between the annular tube and the tail gas is small, resulting in low heat recovery efficiency, and after a long period of internal circulation, the water temperature in the water tank rises, further reducing the waste heat recovery efficiency;

[0030] Therefore, the present application provides a melting separation furnace for zinc extraction from zinc-containing solid waste, which comprises a melting separation furnace body 1, a waste heat recovery device, and a filter 2, wherein the waste heat recovery device is arranged on the right side of the melting separation furnace body 1, and the filter 2 is arranged above the waste heat recovery device; the waste heat recovery device further comprises a cooling and dust removal device 3, a cooler 4, a heat preservation water tank 5, a preheater 6, and a raw water pipeline 7; the cooling and dust removal device 3 is arranged on the right side of the melting separation furnace body 1 and connected to the left inlet of the cooling and dust removal device 3 and the upper outlet of the melting separation furnace body 1 through a pipeline; the cooler 4 is arranged on the right side of the cooling and dust removal device 3 and directly connected to the left inlet of the cooler 4 through a pipeline; the heat preservation water tank 5 is arranged on the right side of the cooler 4 and connected to the lower outlet of the cooling and dust removal device 3 and the lower outlet of the cooler 4 through a pipeline; the preheater 6 is arranged on the left side of the cooling and dust removal device 3 and connected to the left inlet of the preheater 6 and the air inlet pipeline of the melting separation furnace body through a pipeline; the right outlet of the preheater 6 is connected to the left air inlet of the melting separation furnace through a pipeline; and the raw water pipeline 7 is arranged behind the cooler 4 and connected to the upper inlet of the cooling and dust removal device 3 and the upper inlet of the cooler 4 through a pipeline.

[0031] According to the above scheme, after the zinc-containing solid waste material is smelted and separated in the melting separation furnace body 1, the waste is discharged from the upper outlet of the melting separation furnace body 1 into the cooling and dust removal device 3 through a pipeline; after the tail gas is treated by the cooling and dust removal device 3, the high-temperature ash contained in the tail gas is reduced; the heat exchanged between the tail gas and the inner wall of the cyclone dust collector 8 is recovered into the heat preservation water tank 5 by the cooling device a; the ash in the tail gas is reduced, the erosion and corrosion of the tail gas to the subsequent device are reduced, the waste heat released by the tail gas during the dust removal process is recovered, the treated tail gas enters the preheater 6 to preheat the gas entering the melting separation furnace, and the refining efficiency of the melting separation furnace is improved; part of the tail gas enters the cooler 4 to recover the remaining waste heat; after the ash in the tail gas is reduced by the cyclone dust collector 8, the tail gas exchanges heat with the heat exchange surface of the cooler 4, the erosion and corrosion of the ash in the tail gas to the heat exchange surface are reduced, the heat exchange area of the cooler 4 is increased, the waste heat recovery efficiency is improved, the cooling water from the raw water pipeline is stored in the heat preservation water tank 5 after absorbing the waste heat in the cooler 4, and is delivered to the water-using equipment through the heat preservation water tank 5; and the tail gas is filtered and treated by the filter 2 after recovering the waste heat in the cooler 4 and is then discharged.

[0032] Further, the cooling and dust removal device 3 further comprises a cyclone dust collector 8, a cooling device a, and an outer shell a 9, wherein the cooling device a is arranged outside the cyclone dust collector 8, and the outer shell a 9 is arranged outside the cooling device a.

[0033] Wherein, the tail gas after entering the cyclone dust collector 8 along the cyclone dust collector 8 to avoid the cyclone, most of the ash in the tail gas under the action of centrifugal force and gravity constantly down, the rest of the tail gas after cyclone upward discharge, the process of high temperature tail gas and the heat transfer of the inner wall of the cyclone dust collector 8 is absorbed by the cold cutting device outside the inner wall, to reduce the ash in the tail gas while recycling the waste heat released in the process of dust removal.

[0034] Further, the cooling device a further comprises annular upper header 10, annular lower header 11, vertical heat exchange pipe 12, horizontal heat exchange pipe 13, annular upper header 10 is arranged above the cyclone dust collector 8, annular lower header 11 is arranged below the annular upper header 10, vertical heat exchange pipe 12 is arranged between the annular upper header 10 and the annular lower header 11, horizontal heat exchange pipe 13 is arranged between the vertical heat exchange pipe 12 on both sides of the pipeline near the rear side inlet of the cyclone dust collector 8;

[0035] Wherein, the cooling water entering the original water pipeline first enters the annular upper header 10, after the flow through the vertical heat exchange pipe 12 after heat collection to the annular lower header 11, then flows into the heat preservation water tank 5, the horizontal heat exchange pipe 13 is arranged between the vertical heat exchange pipe 12 near the air inlet of the rear side of the cyclone dust collector 8, which ensures the heat exchange reliability of the cooling device a.

[0036] Further, the cooler 4 further comprises air inlet 14, shell b 15, cooling device b, air inlet 14 is arranged on the left side of the shell b 15, cooling device b is arranged inside the shell b 15;

[0037] Wherein, the tail gas after dust removal treatment enters the air inlet 14 through the pipeline, due to the pipe diameter expansion of the air inlet 14, the speed of the gas flow is appropriately reduced and the flow area is increased, which facilitates the tail gas to enter the cooling device b for sufficient heat exchange and cooling, and the cooled tail gas is discharged upward through the rear air chamber.

[0038] Further, the preheater 6 further comprises shell c 24, cavity a 25, cavity b 26, gas guide pipe 27, cavity a 25 is arranged inside the shell c 24, and the upper inlet of the cavity a 25 is connected with the outlet pipeline above the cooling dust collector through the pipeline, cavity b 26 is arranged below the inner side of the shell c 24, and the lower outlet of the cavity b 26 is connected with the upper outlet pipeline of the cooler 4 through the pipeline, the cavity a 25 and the cavity b 26 are connected through the gas guide pipe 27;

[0039] Wherein, the high temperature tail gas introduced from the outlet pipeline of the cooling dust collector enters the cavity a 25, after the flow is divided, the gas heated by the gas guide pipe 27 enters the preheater 6, and after heat exchange and cooling, it is collected into the cavity b 26, and then it is collected into the upper outlet pipeline of the cooler 4 from the lower part of the cavity b 26.

[0040] Further, the original water pipeline 7 is provided with a circulating pump group 28 for providing circulating power for the cooling water of the waste heat recovery device;

[0041] The circulating pump group 28 can provide power for the circulation of the cooling water between the waste heat recovery devices. Embodiment 1

[0042] As shown in Figure 8 :

[0043] Further, the cooling device b further comprises a header tank a 16, a header tank b 17, a heat exchange coil 18, and a ring fin 19. The header tank a 16 is arranged at the right side behind the air inlet on the left side of the cooler 4, and the inlet above the header tank a 16 is connected to the original water pipeline through a pipeline. The header tank b 17 is arranged below the air outlet on the right side of the cooler 4, and the outlet below the header tank b 17 is connected to the inlet on the left side of the heat preservation water tank 5 through a pipeline. The heat exchange coil 18 is arranged on the right side of the header tank a 16 and the header tank b 17, and the inlet of the heat exchange coil 18 is connected to the outlet on the right side of the header tank a 16. The outlet of the heat exchange coil 18 is connected to the inlet on the back side of the header tank b 17. The ring fin 19 is arranged on the straight section of the heat exchange coil 18.

[0044] The cooling water in the original water pipeline enters the header tank a 16 from above the cooler 4, and then is divided into the heat exchange coil 18 to exchange heat with the high-temperature tail gas outside the coil. After heat exchange, the cooling water is collected in the header tank b 17 and then is discharged into the heat preservation water tank 5 from below the header tank b 17. The header tank a 16 and the header tank b 17 ensure the stable circulation of the cooling water. The ring fin increases the heat exchange area on the basis of the coil, thereby improving the waste heat recovery efficiency. Embodiment 2

[0045] As shown in Figure 9 :

[0046] Further, the cooling device b further comprises a header tank c 20, a header tank d 21, a connecting pipe 22, and a heat conduction plate 23. The header tank c 20 is arranged on the inner side above the shell a 9. The header tank d 21 is arranged on the inner side below the shell b 15. The connecting pipe 22 is arranged between the header tank c 20 and the header tank d 21. The heat conduction plate 23 is arranged on the outer side of the connecting pipe 22.

[0047] The cooling water in the original water pipeline enters the header tank c 20 from above, and then is divided into the header tank d 21 through the connecting pipe 22. The header tank c 20 and the header tank d 21 ensure the stable circulation of the cooling water. In the process, the cooling water exchanges heat with the high-temperature tail gas through the wall of the connecting pipe 22 and the heat conduction plate 23. The multiple layers of the heat conduction plate 23 increase the heat exchange area of the cooling device b, thereby improving the waste heat recovery efficiency.

[0048] In summary, the device increases the cooling dust collector before recycling, which reduces the ash in the tail gas and reduces the erosion damage of the tail gas to the subsequent device, and recycles the waste heat released by the tail gas in the dust removal process; the preheater 6 using the dust-removed tail gas is provided to preheat the gas, the dust-removed tail gas is used to preheat the gas entering the melting furnace, and the refining efficiency of the melting furnace is improved; the structure of the cooling device b in the cooler 4 is improved, the heat exchange area is increased, the heat preservation water tank 5 for storing hot water is increased, and the waste heat recovery efficiency is improved.

[0049] The working principle of the utility model is:

[0050] When the zinc-containing solid waste material enters the melting furnace body 1 and is smelted and separated, the waste generated from the outlet above the melting furnace body 1 enters the cooling and dust removal device 3 through the pipeline, the tail gas avoids the cyclone along the cyclone dust collector 8 after entering the cyclone dust collector 8, most of the ash in the tail gas falls down under the action of centrifugal force and gravity, and the remaining tail gas is discharged upward after cyclone, the heat of the high-temperature tail gas and the heat transferred by the inner wall of the cyclone dust collector 8 are absorbed by the cold cutting device outside the inner wall, so that the ash in the tail gas is reduced, and the waste heat released by the tail gas in the dust removal process is recycled;

[0051] The treated tail gas leaves the cooling and dust removal device 3, the high-temperature tail gas introduced from the cooling dust collector outlet pipeline enters the cavity a25, heats the gas entering the preheater 6 through the gas guide pipe 27 after being divided, and is collected into the cavity b26 after heat exchange and cooling, and then is collected into the outlet pipeline above the cooler 4 from below the cavity b26, so that the refining efficiency of the melting furnace is improved;

[0052] Part of the tail gas enters the cooler 4 to recycle the remaining waste heat, in embodiment 1, the cooling water in the raw water pipeline enters the header a16 from above the cooler 4, and then is divided into the heat exchange coil pipe 18 to exchange heat with the high-temperature tail gas outside the coil pipe, the tail gas vertically washes the heat exchange coil pipe 18 and parallelly washes the annular fin 19, and is collected into the header b17 after heat exchange, and then is discharged into the heat preservation water tank 5 from below the header b17, the header a16 and the header b17 ensure the circulation stability of the cooling water, the annular fin increases the heat exchange area on the basis of the coil pipe, and the waste heat recovery efficiency is improved;

[0053] In embodiment 2, the cooling water in the raw water pipeline enters from above the header c20, and then enters the header d21 through the connecting pipe 22 after being divided, the header c20 and the header d21 ensure the circulation stability of the cooling water, the cooling water exchanges heat with the high-temperature tail gas through the wall surface of the connecting pipe 22 and the heat conduction plate 23 in the process, the heat conduction plate 23 arranged in multiple layers increases the heat exchange area of the cooling device b, and the waste heat recovery efficiency is improved;

[0054] The cooling water in the above process absorbs the waste heat and then enters the heat preservation water tank 5 for storage, is transported to the water using equipment through the heat preservation water tank 5, is cooled by inputting raw water, the heat preservation water tank 5 stores and outputs hot water, ensures stable operation of the cooling system, increases the temperature difference between the cooling water and the tail gas, increases the heat exchange efficiency, and the tail gas is discharged after being filtered by the filter 2 after recovering the waste heat in the cooler 4;

[0055] Thus far, the operation principle of the device is described.

[0056] It should be noted that, in this document, the terms such as first and second are used merely to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such a process, method, article or equipment.

[0057] Although the embodiments of the present application have been shown and described, it should 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 application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A smelting furnace for extracting zinc from zinc-containing solid waste, comprising a smelting furnace body (1), a waste heat recovery device, and a filter (2), wherein the waste heat recovery device is arranged on the right side of the smelting furnace body (1), and the filter (2) is arranged above the waste heat recovery device, characterized in that: The waste heat recovery device further comprises a cooling dust removal device (3), a cooler (4), an insulation water tank (5), a preheater (6), and a raw water pipeline (7). The cooling dust removal device (3) is arranged on the right side of the melting furnace body (1) and is connected to the left inlet of the cooling dust removal device (3) and the upper outlet of the melting furnace body (1) through a pipeline. The cooler (4) is arranged on the right side of the cooling dust removal device (3) and the upper outlet of the cooling dust removal device (3) is directly connected to the left inlet of the cooler (4) through a pipeline. The insulation water tank (5) is arranged on the right side of the cooler (4) and The right inlet of the heat preservation water tank (5) is connected to the lower outlet of the cooling dust removal device (3) and the lower outlet of the cooler (4) through a pipe. The preheater (6) is arranged on the left side of the cooling dust removal device (3) and the left inlet of the preheater (6) is connected to the air inlet pipeline of the melting furnace body through a pipe. The right outlet of the preheater (6) is connected to the air inlet on the left side of the melting furnace through a pipe. The raw water pipeline (7) is arranged at the rear of the cooler (4) and the raw water pipeline (7) is connected to the upper inlet of the cooling dust removal device (3) and the upper inlet of the cooler (4) through a pipe.

2. A smelting furnace for extracting zinc from zinc-containing solid waste according to claim 1, characterized in that: The cooling dust removal device (3) further comprises a cyclone dust collector (8), a cooling device a, and a housing a (9). The cooling device a is arranged outside the cyclone dust collector (8), and the housing a (9) is arranged outside the cooling device a.

3. A smelting furnace for extracting zinc from zinc-containing solid waste according to claim 2, characterized in that: The cooling device a further comprises an annular upper header (10), an annular lower header (11), vertical heat exchange tubes (12), and horizontal heat exchange tubes (13). The annular upper header (10) is arranged above the cyclone dust collector (8), the annular lower header (11) is arranged below the annular upper header (10), the vertical heat exchange tubes (12) are arranged between the annular upper header (10) and the annular lower header (11), and the horizontal heat exchange tubes (13) are arranged between the vertical heat exchange tubes (12) on both sides of the pipeline close to the rear inlet of the cyclone dust collector (8).

4. A smelting furnace for extracting zinc from zinc-containing solid waste according to claim 1, characterized in that: The cooler (4) further comprises an air inlet scoop (14), a shell b (15), and a cooling device b. The air inlet scoop (14) is arranged on the left side of the shell b (15), and the cooling device b is arranged inside the shell b (15).

5. A smelting furnace for extracting zinc from zinc-containing solid waste according to claim 4, characterized in that: The cooling device b further comprises a header a (16), a header b (17), a heat exchange coil (18), and an annular fin (19). The header a (16) is arranged at the right rear side of the left air inlet of the cooler (4), and the upper inlet of the header a (16) is connected to the raw water pipeline through a pipeline. The header b (17) is arranged below the upper air outlet of the right side of the cooler (4), and the lower outlet of the header b (17) is connected to the left inlet of the insulation water tank (5) through a pipeline. The heat exchange coil (18) is arranged on the right side of the header a (16) and the header b (17), and the inlet of the heat exchange coil (18) is connected to the right outlet of the header a (16), the outlet of the heat exchange coil (18) is connected to the rear inlet of the header b (17), and the annular fin (19) is arranged on the straight section of the heat exchange coil (18).

6. A smelting furnace for extracting zinc from zinc-containing solid waste according to claim 4, characterized in that: The cooling device b further comprises a header c (20), a header d (21), a connecting pipe (22), and a heat conducting plate (23), wherein the header c (20) is arranged above the inner side of the shell a (9), the header d (21) is arranged below the inner side of the shell b (15), the connecting pipe (22) is arranged between the header c (20) and the header d (21), and the heat conducting plate (23) is arranged outside the connecting pipe (22).

7. The smelting furnace for extracting zinc from zinc-containing solid waste according to claim 1, characterized in that: The preheater (6) further comprises a shell c (24), a cavity a (25), a cavity b (26), and an air duct (27), wherein the cavity a (25) is arranged above the inner side of the shell c (24), and the upper inlet of the cavity a (25) is connected to the upper outlet pipeline of the cooling dust collector via a pipeline, the cavity b (26) is arranged below the inner side of the shell c (24), and the lower outlet of the cavity b (26) is connected to the upper outlet pipeline of the cooler (4) via a pipeline, and the cavity a (25) and the cavity b (26) are connected via an air duct (27).

8. The smelting furnace for extracting zinc from zinc-containing solid waste according to claim 1, characterized in that: The raw water pipeline (7) is provided with a circulation pump group (28) for providing circulation power for the cooling water of the waste heat recovery device.

Images