Multistage combustion tower for zinc oxide recovery

Abstract

The application discloses a multilayer combustion tower for zinc oxide recovery and relates to the technical field of waste resource recycling, which can solve the problems of large land occupation, insufficient combustion, easy suction of raw materials and the like of the currently inclined rotary kiln. The multilayer combustion tower for zinc oxide recovery comprises a shell, at least two layers of combustion plates arranged in the shell in the vertical direction, a sleeve penetrating through all the combustion plates in the vertical direction, a discharging structure arranged in the sleeve and attached to the inner wall of the sleeve, a plurality of wall holes arranged on the sleeve, the discharging structure being connected to the sleeve in the vertical direction, and a lifting assembly for driving the discharging structure to slide and lift in the sleeve.

Description

Technical Field

[0001] This invention relates to the field of waste resource recycling technology, specifically to a multi-layer combustion tower for zinc oxide recovery. Background Technology

[0002] Currently, the method for recovering zinc oxide from industrial waste such as furnace dust typically involves processing the furnace dust into granules, then feeding the granules into a rotary kiln for combustion to generate gaseous zinc oxide for recovery. To facilitate the discharge of waste from the rotary kiln, it is generally inclined, with the feed inlet usually located at the higher end. However, using a rotary kiln for combustion recovery currently has the following disadvantages:

[0003] First, the feed inlet of the granular material and the discharge outlet of the gaseous zinc oxide are the same outlet of the rotary kiln. The granular material is easily mixed into the gaseous zinc oxide and discharged. Therefore, a return material system needs to be designed for return material.

[0004] Secondly, rotary kilns are relatively long, usually over 10 meters, and occupy a large area.

[0005] Third, during operation, the overall heat utilization efficiency of rotary kilns is not high, and ring formation often occurs inside the kiln due to insufficient combustion, which affects the recovery efficiency.

[0006] Therefore, based on the above technical background, there is an urgent need to propose a multi-layer combustion tower for zinc oxide recovery in order to solve one or more of the above technical problems. Summary of the Invention

[0007] The purpose of this application is to provide a multi-layer combustion tower for zinc oxide recovery, which solves the problems of large footprint, incomplete combustion, and the fact that the raw material and gaseous zinc oxide have the same outlet, making the raw material easy to be sucked out of the rotary kiln.

[0008] To solve the above-mentioned technical problems, the present invention adopts the following solution:

[0009] This application provides a multi-layer combustion tower for zinc oxide recovery, comprising:

[0010] The housing and at least two combustion plates arranged vertically within the housing, and a sleeve arranged vertically through all the combustion plates;

[0011] The sleeve is equipped with a discharge structure that fits against the inner wall of the sleeve. The discharge structure is slidably connected to the sleeve in a vertical direction. The sleeve is also equipped with several wall holes, and wall holes are distributed above each layer of combustion plate.

[0012] It also includes an air supply assembly that connects the air outlet to the bottom of the sleeve, and a lifting assembly for driving the unloading structure to slide and rise within the sleeve.

[0013] The design concept of this application is: by setting multiple layers of combustion plates and sleeves inside the shell, the material burning on the lower layer of combustion plate can heat the material on the upper layer of combustion plate, which conforms to the heat flow law of flame combustion and can form a three-dimensional layered cage combustion design. Compared with the existing rotary kiln combustion, the combustion is more complete and thorough, which can effectively improve the combustion effect and combustion efficiency of raw materials.

[0014] Another unique feature of this application is that the unloading structure can be raised and lowered via a lifting assembly. Combined with an air supply assembly connecting the air outlet to the bottom of the sleeve, the sleeve's wall hole can serve multiple functions: when the wall hole is above the unloading structure, it can function as a feed inlet; when it is below the unloading structure, it can function as a ventilation opening to introduce air. Therefore, the overall structure is rationally compact and occupies a small area. Furthermore, the gaseous zinc oxide outlet of this application is located at the top of the shell. Compared to existing rotary kiln combustion recovery systems, it eliminates the need for a shared feed inlet and exhaust outlet, preventing the extraction of large amounts of raw material and avoiding repeated material return issues.

[0015] Therefore, compared with traditional rotary kiln recycling, the technical solution provided in this application has more complete and thorough combustion of raw materials, higher efficiency, more compact structure, smaller footprint, and the raw materials are less likely to be sucked out, which can effectively solve a series of problems faced by traditional rotary kiln combustion.

[0016] Preferably, the combustion plates are all movably connected to the sleeve, and the system also includes a drive assembly for driving the sleeve to rotate.

[0017] The lifting assembly includes a winch, lifting cables, load-bearing cables, and a free-reversing structure, wherein:

[0018] One end of the lifting cable is wound around the winch, and the other end is connected to the free-reversing structure.

[0019] One end of the load-bearing cable is fixedly connected to the top of the unloading structure, and the other end is fixedly connected to the free-reversing structure; the load-bearing cable can rotate along its axis through the free-reversing structure.

[0020] Preferably, the free-reversing structure includes a support ring and a T-shaped member, as well as a plurality of balls, wherein:

[0021] The center of the ring body has a through hole running vertically through it, and the T-shaped piece is inserted into the hole of the ring body and is movably connected to it;

[0022] The top surface of the support ring is provided with a circular groove, and the ball is disposed in the circular groove;

[0023] The end of the load-bearing cable away from the unloading structure is fixedly connected to the T-shaped component, and the end of the lifting cable away from the winch is connected to the support ring body.

[0024] Preferably, the lifting assembly further includes at least two limiting pulleys disposed on the housing and located above the sleeve, and the free reversing structure is located between the two or more limiting pulleys;

[0025] The number of winches and lifting cables is the same as the number of limiting pulleys, and the end of the lifting cable away from the winch is fixedly connected to the support ring body;

[0026] When the winches are running, two or more winches simultaneously wind up or unwind.

[0027] Preferably, the lifting assembly further includes at least two limiting pulleys disposed above the sleeve, and the free reversing structure is located between the two or more limiting pulleys;

[0028] The free reversing structure also includes a lifting lug fixedly connected to the ring body;

[0029] The number of winches and lifting cables is one, and the end of the lifting cable away from the winch passes through the lifting lug and is fixed to the housing.

[0030] Preferably, the combustion plate is circular in shape, and each combustion plate is provided with a waste discharge port;

[0031] Several scrapers for turning over materials and discharging waste are also fixed on the outer peripheral wall of the sleeve. Each layer of the combustion plate is equipped with a scraper at the top, and the bottom of the scraper is set close to or slidably connected to the top of the combustion plate.

[0032] Preferably, the outer ring of the combustion plate is fixed to the housing;

[0033] Several sets of sliding structures are fixed on the outer peripheral wall of the sleeve. Each set of sliding structures corresponds to a layer of combustion plate. The sliding structure is provided with an arc-shaped groove along the circumference of the sleeve. The inner ring of the combustion plate is embedded in the groove of the sliding structure and slidably connected to it.

[0034] Preferably, the combustion plate is provided with three layers and is evenly distributed vertically, the three layers being a first combustion plate, a second combustion plate, and a third combustion plate;

[0035] The outer peripheral wall of the sleeve is provided with three sets of sliding structures, each set consisting of one sliding structure. The three sets of sliding structures are the first sliding structure, the second sliding structure, and the third sliding structure. The inner rings of the first combustion plate, the second combustion plate, and the third combustion plate are respectively embedded in the first sliding structure, the second sliding structure, and the third sliding structure and are slidably connected to them.

[0036] The first combustion plate, the second combustion plate, and the third combustion plate are respectively provided with a first row of waste outlets, a second row of waste outlets, and a third row of waste outlets, which are staggered in the vertical direction;

[0037] The bottom of the first waste discharge port is also equipped with an inclined waste discharge plate;

[0038] The second and third combustion plates are respectively provided with a number of second and third through holes, and the third through holes are larger than the second through holes;

[0039] The scraper is provided with three pieces, namely the first scraper, the second scraper and the third scraper, which are slidably connected to the top of the first combustion plate, the second combustion plate and the third combustion plate, respectively;

[0040] The wall holes include a first wall hole located vertically between the first combustion plate and the second combustion plate, a second wall hole located between the second combustion plate and the third combustion plate, and a third wall hole located above the third combustion plate.

[0041] Preferably, the unloading structure includes an inclined unloading section and a cylindrical isolation section integrally connected to the bottom of the inclined unloading section;

[0042] The output end of the lifting assembly is fixedly connected to the top center of the inclined unloading section;

[0043] The outer peripheral wall of the cylindrical isolation part is fitted to the inner peripheral wall of the sleeve.

[0044] Preferably, the inner peripheral wall of the sleeve is further provided with a guide rail arranged parallel to the sleeve axis, and the outer peripheral wall of the cylindrical isolation part is provided with a slide rail matching the guide rail;

[0045] The inner circumferential wall of the sleeve is also provided with a limiting structure located below the bottom combustion plate.

[0046] The beneficial effects of this application are:

[0047] The multi-layer combustion tower of this application has the advantages of complete and thorough combustion of raw materials, high efficiency, compact structure, and small footprint. At the same time, the raw materials are not easily sucked out, which can effectively solve a series of problems faced by traditional rotary kiln combustion. Attached Figure Description

[0048] Figure 1 This is a schematic diagram of the main structure of Embodiment 1 of the present invention during combustion;

[0049] Figure 2 for Figure 1 A magnified view of a portion of point A in the middle;

[0050] Figure 3 This is a top-view cross-sectional view of KK in Embodiment 1 of the present invention;

[0051] Figure 4 This is a schematic diagram of the main structure of the feeding structure in Embodiment 1 of the present invention;

[0052] Figure 5 This is a schematic diagram of the main structure of Embodiment 1 of the present invention during the material feeding of the first layer;

[0053] Figure 6 This is a schematic diagram of the main structure of Embodiment 1 of the present invention during the material feeding of the second layer;

[0054] Figure 7 This is a schematic diagram of the main structure of Embodiment 1 of the present invention during the material feeding of the third layer;

[0055] Figure 8 This is a schematic diagram of the main structure of Embodiment 2 of the present invention;

[0056] Figure 9 for Figure 8 A magnified view of a portion of point B in the middle.

[0057] Explanation of reference numerals in the attached figures:

[0058] 1-Shell, 11-Exhaust port, 21-First combustion plate, 210-Waste discharge plate, 211-First waste discharge port, 22-Second combustion plate, 221-Second waste discharge port, 222-Second through hole, 23-Third combustion plate, 231-Third waste discharge port, 232-Third through hole, 3-Sleeve, 311-First wall hole, 312-First sliding structure, 313-First scraper, 321-Second wall hole, 322-Second sliding structure, 323-Second scraper, 331-Third wall hole, 332-Third sliding structure, 333 - Third scraper, 34- Limiting structure, 35- Guide rail, 41- Winch, 42- Lifting cable, 43- Load-bearing cable, 44- Free reversing structure, 441- Support ring, 442- T-shaped part, 443- Ball bearing, 444- Lifting lug, 45- Unloading structure, 451- Inclined unloading part, 452- Cylindrical isolation part, 453- Slide rail, 46- Limiting pulley, 5- Drive structure, 51- Drive motor, 52- Drive gear, 61- Fan, 62- Air supply pipe, 7- Base plate, 71- Circular slide rail, 8- Igniter. Detailed Implementation

[0059] The present invention will be further described in detail below with reference to the embodiments and accompanying drawings, but the embodiments of the present invention are not limited thereto.

[0060] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "longitudinal," "lateral," "horizontal," "inner," "outer," "front," "rear," "top," and "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0061] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set up," "have," "install," "connect," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0062] The present invention will now be described in detail with reference to the accompanying drawings and embodiments:

[0063] Example 1:

[0064] like Figures 1 to 7 As shown, this embodiment provides a multi-layer combustion tower for zinc oxide recovery, comprising:

[0065] The housing 1 and at least two combustion plates arranged vertically within the housing 1, and the sleeve 3 arranged vertically through all the combustion plates;

[0066] The sleeve 3 is provided with a discharge structure 45 that fits against the inner wall of the sleeve 3. The discharge structure 45 is slidably connected to the sleeve 3 in a vertical direction. The sleeve 3 is also provided with a number of wall holes, and wall holes are distributed above each layer of combustion plate.

[0067] It also includes an air supply assembly that connects the air outlet to the bottom of the sleeve 3, and a lifting assembly for driving the unloading structure 45 to slide and rise within the sleeve 3.

[0068] The design concept of this application is: by setting multiple layers of combustion plates and sleeves 3 inside the shell 1, the material burning on the lower layer of combustion plate can heat the material on the upper layer of combustion plate, which conforms to the heat flow law of flame combustion and can form a three-dimensional layered cage combustion design concept. Compared with the existing rotary kiln combustion, the combustion is more complete and thorough, which can effectively improve the combustion effect and combustion efficiency of raw materials.

[0069] Another unique feature of this application is that the unloading structure 45 can be raised and lowered by a lifting component. Combined with an air supply component connecting the air outlet to the bottom of the sleeve 3, the wall hole of the sleeve 3 can serve multiple functions: when the wall hole is above the unloading structure 45, it can be used as a feed inlet; when the wall hole is below the unloading structure 45, it can be used as a ventilation opening to introduce air. Therefore, the overall structure is rationally compact and occupies a small area. Furthermore, the gaseous zinc oxide outlet of this application is located at the top of the shell 1. Compared to existing rotary kiln combustion recovery systems, it eliminates the need to share the feed inlet and exhaust outlet 11, thus avoiding the problem of large amounts of raw material being sucked out and causing repeated material return.

[0070] Therefore, compared with traditional rotary kiln recycling, the technical solution provided in this application has more complete and thorough combustion of raw materials, higher efficiency, more compact structure, smaller footprint, and the raw materials are less likely to be sucked out, which can effectively solve a series of problems faced by traditional rotary kiln combustion.

[0071] In a preferred example embodiment, the combustion plates are all movably connected to the sleeve 3, and the embodiment also includes a drive assembly for driving the sleeve 3 to rotate.

[0072] The lifting assembly includes a winch 41, a lifting cable 42, a load-bearing cable 43, and a free-reversing structure 44, wherein:

[0073] One end of the lifting cable 42 is wound on the winch 41, and the other end is connected to the free reversing structure 44.

[0074] One end of the load-bearing cable 43 is fixedly connected to the top of the unloading structure 45, and the other end is fixedly connected to the free-reversing structure 44; the load-bearing cable 43 can rotate along its axis through the free-reversing structure 44. By setting the free-reversing structure 44, and the drive component can drive the sleeve 3 to rotate, the raw material is evenly spread onto the combustion plate after being thrown out of the wall hole, avoiding accumulation, thereby improving the combustion effect.

[0075] In a preferred embodiment, the drive assembly includes a drive motor 51 and a drive gear 52 disposed on the output shaft of the drive motor 51. The outer peripheral wall of the sleeve 3 is provided with a plurality of driven teeth that mesh with the drive gear 52. The drive connection is through the meshing drive gear 52 and driven teeth to drive the sleeve 3 to rotate along its axis.

[0076] Specifically, such as Figure 1 As shown, in this embodiment, a base plate 7 is also provided, the drive motor 51 is vertically arranged on the base plate 7, and an annular slide rail 71 is also provided on the base plate 7. The bottom of the sleeve 3 is embedded in the annular slide rail 71 and slidably connected to it.

[0077] In a preferred example embodiment, such as Figure 2As shown, the free-reversing structure 44 includes a support ring 441 and a T-shaped member, as well as a plurality of balls 443, wherein:

[0078] The center of the ring body 441 is provided with a through-hole, and the T-shaped piece is inserted into the through-hole of the ring body 441 and is movably connected to it.

[0079] The top surface of the support ring 441 is provided with an annular groove, and the ball 443 is disposed in the annular groove; the diameter of the ball 443 is greater than the depth of the annular groove.

[0080] The end of the load-bearing cable 43 away from the unloading structure 45 is fixedly connected to the T-shaped member, and the end of the lifting cable 42 away from the winch 41 is connected to the support ring 441. By providing an annular groove on the top surface of the support ring 441 and placing the ball bearing 443 inside the annular groove, with the diameter of the ball bearing 443 being greater than the depth of the annular groove, the sliding friction between the T-shaped member and the support ring 441 can be converted into rolling friction when the load-bearing cable 43 rotates with the sleeve 3, thereby reducing frictional resistance.

[0081] In a preferred embodiment, the lifting assembly further includes at least two limiting pulleys 46 disposed on the housing 1 and located above the sleeve 3, and the free reversing structure 44 is located between the two or more limiting pulleys 46.

[0082] The number of winches 41 and lifting cables 42 is the same as that of limiting pulleys 46, and the end of the lifting cable 42 away from the winch 41 is fixedly connected to the support ring 441.

[0083] When the winches 41 are started, two or more winches 41 simultaneously wind up or unwind. The simultaneous winding and unwinding of two or more winches 41 allows the load-bearing capacity of the lifting cable 42 to be evenly distributed, balancing the load-bearing force on each limit sliding section.

[0084] In a preferred embodiment, the combustion plate is annular in shape and is provided with exhaust ports on all sides.

[0085] Several scrapers for turning materials and discharging waste are also fixed on the outer peripheral wall of the sleeve 3. Each layer of the combustion plate is equipped with a scraper at the top, and the bottom of the scraper is set close to or slidably connected to the top of the combustion plate.

[0086] Understandably, by setting up a scraper, the scraper can rotate with the rotation of the sleeve 3. When the sleeve 3 rotates, the scraper can turn the raw material on the combustion plate. At the same time, air is continuously introduced from the wall hole on the sleeve 3 to the scraper that is turning the material, so that the raw material is quickly exposed to the introduced air after being turned out, achieving complete combustion. While turning the material, the scraper can also prevent the raw material from sticking to the combustion plate during sintering.

[0087] In a preferred embodiment, the outer ring of the combustion plate is fixed to the housing 1;

[0088] Several sets of sliding structures are fixed on the outer peripheral wall of the sleeve 3. Each set of sliding structures corresponds to a layer of combustion plate. The sliding structure is provided with an arc-shaped groove along the circumference of the sleeve 3. The inner ring of the combustion plate is embedded in the groove of the sliding structure and slidably connected to it. By setting the sliding structure, the sliding structure can support the combustion plate and ensure its stability.

[0089] Specifically, such as Figures 1 to 3 As shown, the combustion plate is provided with three layers and is evenly distributed vertically. The three layers of combustion plates are the first combustion plate 21, the second combustion plate 22 and the third combustion plate 23.

[0090] The outer peripheral wall of the sleeve 3 is provided with three sets of sliding structures, each set consisting of one sliding structure. The three sets of sliding structures are the first sliding structure 312, the second sliding structure 322, and the third sliding structure 332. The inner rings of the first combustion plate 21, the second combustion plate 22, and the third combustion plate 23 are respectively embedded in the first sliding structure 312, the second sliding structure 322, and the third sliding structure 332 and slidably connected to them.

[0091] The first combustion plate 21, the second combustion plate 22 and the third combustion plate 23 are respectively provided with a first row of waste outlets 211, a second row of waste outlets 221 and a third row of waste outlets 231, which are staggered in the vertical direction.

[0092] The bottom of the first waste discharge port 211 is also provided with an inclined waste discharge plate 210;

[0093] The second combustion plate 22 and the third combustion plate 23 are respectively provided with a plurality of second through holes 222 and third through holes 232, wherein the third through hole 232 is larger than the second through hole 222;

[0094] The scraper is provided in three parts, namely the first scraper 313, the second scraper 323 and the third scraper 333. The first scraper 313, the second scraper 323 and the third scraper 333 are slidably connected to the top of the first combustion plate 21, the second combustion plate 22 and the third combustion plate 23 respectively.

[0095] The wall holes include a first wall hole 311 located vertically between the first combustion plate 21 and the second combustion plate 22, a second wall hole 321 located between the second combustion plate 22 and the third combustion plate 23, and a third wall hole 331 located above the third combustion plate 23. By providing the second through hole 222 and the third through hole 232, the flow of heat and air can be improved. At the same time, some raw materials can fall downwards during the movement of the scraper, achieving rapid combustion in the air, thereby improving the combustion effect.

[0096] In a preferred example embodiment, such as Figure 4 As shown, the unloading structure 45 includes an inclined unloading section 451 and a cylindrical isolation section 452 integrally connected to the bottom of the inclined unloading section 451.

[0097] The output end of the lifting assembly is fixedly connected to the top center of the inclined unloading section 451;

[0098] The outer peripheral wall of the cylindrical isolation part 452 is fitted to the inner peripheral wall of the sleeve 3. In this embodiment, the inclined unloading part 451 is conical in shape, and the cylindrical isolation part 452 is cylindrical in shape. The outer peripheral wall of the cylindrical isolation part 452 is fitted to the inner peripheral wall of the sleeve 3, which can prevent material from falling out of the sleeve 3.

[0099] In a preferred example embodiment, such as Figure 1 and Figure 4 As shown, a guide rail 35 parallel to the axis of the sleeve 3 is also provided on the inner peripheral wall of the sleeve 3, and a slide rail 453 matching the guide rail 35 is provided on the outer peripheral wall of the cylindrical isolation part 452.

[0100] The inner circumferential wall of the sleeve 3 is also provided with a limiting structure 34 located below the bottom combustion plate. The limiting structure 34 can limit the descent depth of the unloading structure 45. The limiting structure 34 is a circular protrusion with a cross-section in the shape of a semi-circle or rectangle.

[0101] Specifically, the air supply assembly includes a fan 61 and an air supply duct 62. The outlet end of the fan 61 is connected to the air supply duct 62, and the end of the air supply duct 62 away from the fan 61 passes through the base plate 7 and is connected to the bottom of the sleeve 3. The fan 61 can supply air into the sleeve 3 through the air supply duct 62, and then supply air above the combustion plates on which raw materials are piled up through the wall holes of the sleeve 3, thereby achieving continuous combustion. In this embodiment, an igniter 8 is also provided above each combustion plate for ignition, and the igniter 8 is mounted on the housing 1.

[0102] When using this embodiment:

[0103] First, start the winch 41 to unwind, lowering the unloading structure 45 to the first wall hole 311, stopping when the bottom of the inclined unloading section 451 is flush with the bottom of the first wall hole 311. At this point, if... Figure 5 As shown, the raw material is then fed to the top of the sleeve 3, where it falls downwards under gravity. It then falls from the first wall hole 311 onto the first combustion plate 21. Once the amount of raw material on the first combustion plate 21 reaches the target, the winch 41 drives the unloading structure 45 to rise until the bottom of the inclined unloading section 451 is flush with the bottom of the second wall hole 321, at which point it stops. Figure 6 As shown, during the ascent, the raw material accumulated inside the sleeve 3 enters the second combustion plate 22 through the second wall hole 321. After the amount of raw material on the second combustion plate 22 reaches the target, the unloading structure 45 continues to rise via the winch 41 until the bottom of the inclined unloading section 451 is flush with the bottom of the third wall hole 331, at which point it stops. Figure 7 As shown, the igniter 8 is then activated to ignite the raw material, allowing the material spread on the three combustion plates inside the casing 1 to burn. The drive motor 51 is then activated, causing the raw material to be continuously agitated by scrapers during combustion, preventing incomplete combustion and caking. The waste material after combustion can be discharged through the waste outlet until it exits from the first waste outlet 211 on the first combustion plate 21. By driving the unloading structure 45 to rise and fall, raw material can be replenished to the combustion plates at different heights, achieving continuous combustion.

[0104] Example 2:

[0105] like Figure 8 and Figure 9 As shown, in this embodiment, the lifting assembly further includes at least two limiting pulleys 46 disposed above the sleeve 3, and the free reversing structure 44 is located between the two or more limiting pulleys 46.

[0106] The free reversing structure 44 also includes a lifting lug 444 fixedly connected to the ring body 441;

[0107] The number of winches 41 and lifting cables 42 is one. The end of the lifting cable 42 away from the winch 41 passes through the lifting lug 444 and is fixed to the housing 1.

[0108] like Figure 9 As shown, in this embodiment, the lifting cable 42 passes through the lifting lug 444 and is fixed to the housing 1. Under the gravity of the load-bearing cable 43, the unloading structure 45, and the free reversing structure 44, the lifting lug 444 is hung on the lifting cable 42, so that when the winch 41 unwinds, the load-bearing cable 43 and the unloading structure 45 both move downwards, and vice versa, thereby realizing the lifting and lowering of the unloading structure 45.

[0109] In this embodiment, the lug 444 is a gate-shaped structure, but it can also be an arch-shaped structure.

[0110] The remaining structures in this embodiment are the same as those in Embodiment 1 above, and will not be described again here.

[0111] It is understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present invention, and the present invention is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A multi-layer combustion tower for zinc oxide recovery, characterized in that, include: The housing (1) and at least two combustion plates arranged vertically within the housing (1), and a sleeve (3) arranged vertically through all the combustion plates; The sleeve (3) is provided with a discharge structure (45) that fits against the inner wall of the sleeve (3). The discharge structure (45) is slidably connected to the sleeve (3) in the vertical direction. The sleeve (3) is also provided with several wall holes. Each layer of the combustion plate is provided with wall holes above it. It also includes an air supply assembly that connects the air outlet to the bottom of the sleeve (3), and a lifting assembly for driving the unloading structure (45) to slide and rise within the sleeve (3); The combustion plates are all movably connected to the sleeve (3), and the sleeve (3) is also included as a drive assembly for driving the sleeve (3) to rotate. The lifting assembly includes a winch (41), a lifting cable (42), a load-bearing cable (43), and a free-reversing structure (44), wherein: One end of the lifting cable (42) is wound around the winch (41), and the other end is connected to the free-reversing structure (44). One end of the load-bearing cable (43) is fixedly connected to the top of the unloading structure (45), and the other end is fixedly connected to the free reversing structure (44); the load-bearing cable (43) can rotate along its axis through the free reversing structure (44); The free-reversing structure (44) includes a support ring (441) and a T-shaped member, as well as several balls (443), wherein: The center of the ring support (441) is provided with a through-hole, and the T-shaped piece is inserted into the through-hole of the ring support (441) and is movably connected to it. The top surface of the ring body (441) is provided with a circular groove, and the ball (443) is disposed in the circular groove; The end of the load-bearing cable (43) away from the unloading structure (45) is fixedly connected to the T-shaped piece, and the end of the lifting cable (42) away from the winch (41) is connected to the support ring (441); The lifting assembly also includes at least two limiting pulleys (46) disposed on the housing (1) and located above the sleeve (3), and the free reversing structure (44) is located between the two or more limiting pulleys (46).

2. The multi-layer combustion tower for zinc oxide recovery according to claim 1, characterized in that, The number of the winch (41) and the lifting cable (42) are the same as the number of the limiting pulley (46), and the end of the lifting cable (42) away from the winch (41) is fixedly connected to the support ring (441); When the winches (41) are started, two or more winches (41) simultaneously wind up or unwind.

3. The multi-layer combustion tower for zinc oxide recovery according to claim 1, characterized in that, The free reversing structure (44) also includes a lug (444) fixedly connected to the ring body (441). The number of the winch (41) and the lifting cable (42) is one. The end of the lifting cable (42) away from the winch (41) passes through the lifting lug (444) and is fixed to the housing (1).

4. The multi-layer combustion tower for zinc oxide recovery according to claim 1, characterized in that, The combustion plate is circular in shape, and each combustion plate is provided with a waste discharge port; The outer peripheral wall of the sleeve (3) is also fixed with several scrapers for turning over materials and discharging waste. Each layer of the combustion plate is provided with a scraper at the top, and the bottom of the scraper is provided close to the combustion plate or slidably connected to the top of the combustion plate.

5. The multi-layer combustion tower for zinc oxide recovery according to claim 4, characterized in that, The outer ring of the combustion plate is fixed to the shell (1); Several sets of sliding structures are fixed on the outer peripheral wall of the sleeve (3). Each set of sliding structures corresponds to a layer of combustion plate. The sliding structure is provided with an arc-shaped groove along the circumference of the sleeve (3). The inner ring of the combustion plate is embedded in the groove of the sliding structure and is slidably connected to it.

6. The multi-layer combustion tower for zinc oxide recovery according to claim 5, characterized in that, The combustion plate is provided with three layers and is evenly distributed vertically. The three layers of combustion plates are the first combustion plate (21), the second combustion plate (22), and the third combustion plate (23). The outer peripheral wall of the sleeve (3) is provided with three sets of sliding structures, each set of which is one. The three sets of sliding structures are the first sliding structure (312), the second sliding structure (322) and the third sliding structure (332). The inner rings of the first combustion plate (21), the second combustion plate (22) and the third combustion plate (23) are respectively embedded in the first sliding structure (312), the second sliding structure (322) and the third sliding structure (332) and are slidably connected to them. The first combustion plate (21), the second combustion plate (22), and the third combustion plate (23) are respectively provided with a first row of waste outlets (211), a second row of waste outlets (221), and a third row of waste outlets (231), which are staggered in the vertical direction; The bottom of the first waste outlet (211) is also provided with an inclined waste outlet plate (210). The second combustion plate (22) and the third combustion plate (23) are respectively provided with a number of second through holes (222) and third through holes (232), and the third through holes (232) are larger than the second through holes (222). The scraper is provided with three pieces, namely the first scraper (313), the second scraper (323) and the third scraper (333), which are slidably connected to the top of the first combustion plate (21), the second combustion plate (22) and the third combustion plate (23), respectively; The wall holes include a first wall hole (311) located vertically between the first combustion plate (21) and the second combustion plate (22), a second wall hole (321) located between the second combustion plate (22) and the third combustion plate (23), and a third wall hole (331) located above the third combustion plate (23).

7. The multi-layer combustion tower for zinc oxide recovery according to claim 1, characterized in that, The unloading structure (45) includes an inclined unloading section (451) and a cylindrical isolation section (452) integrally connected to the bottom of the inclined unloading section (451). The output end of the lifting assembly is fixedly connected to the top center of the inclined unloading section (451); The outer peripheral wall of the cylindrical isolation part (452) is fitted to the inner peripheral wall of the sleeve (3).

8. The multi-layer combustion tower for zinc oxide recovery according to claim 7, characterized in that, The inner circumferential wall of the sleeve (3) is also provided with a guide rail (35) parallel to the axis of the sleeve (3), and the outer circumferential wall of the cylindrical isolation part (452) is provided with a slide rail (453) matching the guide rail (35). The inner circumferential wall of the sleeve (3) is also provided with a limiting structure (34) located below the bottom combustion plate.

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