An annular feed device suitable for large cross-section uniform distribution and a method of use
By designing an annular feeding device, adopting an annular cooling water tank and heat pipe cooling system, and combining a suspended pushing scraper and a bottom unloading scraper, the problems of uneven material distribution and high-temperature cooling protection in large-section devices were solved, achieving uniform material distribution and efficient cooling.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- SHANDONG UNIV OF SCI & TECH
- Filing Date
- 2023-06-14
- Publication Date
- 2026-05-29
AI Technical Summary
There are limitations and challenges in existing technologies for achieving uniform material distribution within large-section devices and solving the cooling and protection issues of devices under high-temperature rotation conditions.
A ring-shaped feeding device was designed, including a shell and a rotating feeding section. It adopts a ring-shaped cooling water tank and a heat pipe cooling system, combined with a suspended pushing scraper and a bottom unloading scraper, to achieve uniform material distribution and solve the high temperature problem through heat pipe cooling.
It achieves uniform material distribution across a large cross-section, reduces operating costs, avoids problems such as inconvenient feeding and excessive shaft torque, and effectively solves the problem of high-temperature cooling protection.
Smart Images
Figure CN116659243B_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the technical field of furnace and kiln auxiliary equipment, specifically relating to a ring-shaped feeding device suitable for uniform material distribution across a large cross-section and its usage method. Background Technology
[0002] For many large-section equipment such as large gasifiers, waste gasification melting furnaces, and steelmaking blast furnaces, ensuring uniform material distribution across the large cross-section is a very challenging problem. Uneven material distribution can lead to various issues. For example, uneven material distribution within the gasifier can result in low gasification efficiency, gasification segregation, slagging, excessively high gas temperature in the free space, and consequently, a series of problems such as fly ash adhesion downstream.
[0003] To solve the problem of uniform material distribution on large cross sections, the commonly used methods are: feeding along the side of the cross section and adding multiple feed ports; feeding from the top and adding a special material spreader for leveling the material. However, in actual use, it has been found that these methods have significant limitations. For example, the method of multiple feed ports on the side can only improve the problem of uneven material distribution to a certain extent, but cannot fundamentally solve the problem, and leveling devices are still required. The top feeding + material spreader method also has the following problems: (1) feeding from the top makes it impossible to arrange the air outlet at the top; (2) when a large cross section and a high free space area are set above the material (such as a gasification melting furnace), it is difficult to arrange the traditional material spreader; (3) even when the height of the free space area is not high, this traditional material spreader often faces problems such as excessive shaft torque and poor material leveling effect when applied to large cross section applications. Especially when used in gasification melting furnaces, the cross-section of this type of furnace gradually increases from bottom to top, often causing the material to form a dome shape with a high center and low edges. This leads to a series of problems such as low gasification efficiency, short circuit at the gas outlet, excessively high gas temperature, fly ash adhesion, and excessive energy consumption. Furthermore, how to cool and protect the material distributor or other feeding devices when they are operating at high temperatures and rotating within the system remains an unsolved problem. Summary of the Invention
[0004] The primary objective of this invention is to provide an annular feeding device suitable for uniformly distributed materials with large cross-sections, in order to solve the problems of uneven material distribution and the inability to provide cooling protection.
[0005] A ring-shaped feeding device suitable for uniform fabric distribution across large cross-sections includes a housing and a rotating fabric distribution section within the housing. The housing includes a circular annular base plate, annular side plates, and an upper circular annular cover plate. The rotating fabric distribution section includes a rotating annular shell plate and an annular rotating inner sealing plate. An annular baffle plate is provided on the inner side of the annular side plate and is welded to the circular annular base plate. The annular baffle plate, the circular annular base plate, and the annular side plates form an annular cooling water tank. A supporting annular plate is provided between the upper circular annular cover plate and the rotating annular shell plate and is welded to the inner sealing plate. On the inner wall of the annular side plate, a rotating annular shell plate is movably connected to a supporting annular plate; the upper annular cover plate, the rotating annular shell plate, the annular rotating inner sealing plate, and the annular bottom plate form an annular material movement channel; several suspended pushing scrapers and at least one bottom unloading scraper distributed along the annular material movement channel are welded between the rotating annular shell plate and the annular rotating inner sealing plate; a discharge hopper is provided on the upper annular cover plate, and the discharge hopper is connected to the annular material movement channel; a material discharge port and a discharge plate are provided on the front side of the bottom unloading scraper.
[0006] Preferably, a heat pipe condensation section is provided in the annular cooling water tank. The heat pipe condensation section is connected to the heat pipe evaporation section through a heat pipe connecting pipe. The heat pipe condensation section is fixed to the rotating annular shell plate by bolts or welding. The heat pipe evaporation section is arranged on any rotating part that needs to be cooled.
[0007] Preferably, the annular bottom plate is directly fixed to the furnace shell plate by welding, the upper end of the annular side plate is welded with an outer ring flange plate, the inner ring flange plate is welded to the furnace shell plate, and the upper annular cover plate is fixed together with the inner ring flange plate and the outer ring flange plate by bolt connection; the unloading plate is welded to the annular rotating inner sealing plate.
[0008] Preferably, the cross-section of the unloading plate is a variable cross-section, which gradually decreases from the outside to the inside.
[0009] Preferably, a gear reduction drive motor is provided on the upper annular cover plate. The gear reduction drive motor meshes with a large gear ring. The large gear ring is fixedly connected to the rotating annular shell plate through circumferentially distributed shaft-shaped connecting rods. Each shaft-shaped connecting rod is fitted with a supporting roller. The roller rotates in an annular track composed of an upper guide rail and a lower guide rail. The upper guide rail is fixed to the upper annular cover plate by welding, bolts, or threads. The lower guide rail is fixed to the supporting annular plate by welding, bolts, or threads.
[0010] Preferably, driven gears are evenly arranged on the outer periphery of the large gear ring, and the driven gears mesh with the large gear ring.
[0011] Preferably, a certain distance is maintained between the suspended pushing scraper and the annular base plate, and a very small gap is reserved between the bottom unloading scraper and the annular base plate; the suspended pushing scraper can be a fixed scraper or a movable scraper.
[0012] Preferably, one or more unloading hoppers are arranged circumferentially; the number of unloading ports is consistent with the number of bottom unloading scrapers and variable cross-section rotating unloading plates.
[0013] Preferably, the outer bottom of the annular base plate has several supporting reinforcing ribs distributed circumferentially.
[0014] The second objective of this invention is to provide a method of using an annular feeding device suitable for uniformly distributed fabric with a large cross-section.
[0015] A method of using one or more annular feeding devices preferably suitable for uniform distribution of large cross-section materials, wherein the material enters the annular material moving channel from the discharge hopper, the suspended pushing scraper in the annular material moving channel flattens the material falling into the annular material moving channel to a certain height along the annular material moving channel, and the bottom discharge scraper pushes the flattened material through the material discharge port onto the discharge plate, the discharge plate rotates with the annular rotating inner sealing plate, so that when the material slides down through the discharge plate into the internal space, the material will be evenly distributed radially.
[0016] The beneficial effects of this invention are:
[0017] In this invention, the unloading plate is welded to the annular rotating inner sealing plate and rotates along with the rotation of the annular rotating inner sealing plate. The cross-section of the unloading plate gradually decreases from the outside to the inside, so that when the material slides down the unloading plate into the internal space, the material will be evenly distributed radially, ultimately ensuring that the material is evenly distributed across the entire internal cross-section when it falls into the internal space.
[0018] The evaporator section, connected via heat pipes, can be placed in any area requiring cooling, effectively solving the problem of component cooling when the internal temperature is too high. The drive motor, positioned on the circumference of the rotating shaft, provides high driving torque, resolving the issue of excessive shaft torque in central shaft-type leveling equipment when leveling materials on large cross-sections. Compared to top-feed methods, the side-annular feeding method effectively avoids the inconvenience of excessively high feed inlets in applications with large processing capacities. This not only reduces the floor space required but also lowers operating costs. Attached Figure Description
[0019] Figure 1 This is a top view of a ring-shaped feeding device suitable for uniformly distributed fabric with a large cross-section.
[0020] Figure 2 This is a front view of a ring-shaped feeding device suitable for uniformly distributed fabric with a large cross-section.
[0021] Figure 3 What is shown is Figure 2 Enlarged cross-sectional view of part A in the image.
[0022] 1—Annular side plate; 2—Annular cooling water tank; 3—Heat pipe condensation section; 4—Heat pipe connecting pipe; 5—Heat pipe evaporation section; 6—Gear reduction drive motor; 7—Large gear ring; 8—Upper guide rail for rollers; 9—Supporting rollers; 10—Shaft-shaped connecting rod; 11—Lower guide rail for rollers; 12—Supporting circular plate; 13—Rotating annular shell plate; 14—Annular baffle plate; 15—Furnace body refractory insulation material; 16—Furnace body outer shell plate; 17—Cooling water outlet. Water pipe: 18—Driven gear: 19—Suspended pusher scraper: 20—Discharge plate: 21—Discharge hopper: 22—Bottom discharge scraper: 23—Material inlet hole: 24—Upper annular cover plate: 25—Annular feeder support reinforcing rib: 26—Annular base plate: 27—Cooling water inlet pipe: 28—Annular rotating inner sealing plate: 29—Annular material movement channel: 30—Material discharge port: 31—Inner ring flange plate: 32—Outer ring flange plate. Detailed Implementation
[0023] The invention will be further described with reference to the accompanying drawings. A ring-shaped feeding device and its method of use, suitable for uniform material distribution across a large cross-section, includes an outer shell and a rotating feeding section within the shell. The outer shell includes a circular annular base plate 26, an annular side plate 1, and an upper circular annular cover plate 24. The rotating feeding section includes a rotating annular shell plate 13 and an annular rotating inner sealing plate 28. The circular annular base plate 26 is provided with annular feeder support reinforcing ribs 25. The circular annular base plate 26 is directly fixed to the furnace body outer shell plate 16 by welding. The interior of the furnace body outer shell plate 16 is lined with furnace refractory insulation material 15. The outer flange plate 32 is welded to the upper end of the annular side plate 1, and the inner flange plate 31 is welded to the outer shell plate 16 of the furnace body. The upper annular cover plate 24 is fixed to the inner flange plate 31 and the outer flange plate 32 by bolts or other connection methods. An annular baffle plate 14 is provided on the inner side of the annular side plate 1. The annular baffle plate 14 is welded to the annular bottom plate 26. The annular baffle plate 14, the annular bottom plate 26, and the annular side plate 1 form an annular cooling water tank 2. A cooling water inlet pipe 27 and a cooling water outlet pipe 17 are opened near the outer edge of the annular bottom plate. Cooling water enters the annular cooling water tank 2 through these openings.
[0024] A supporting annular plate 12 is provided between the upper annular cover plate 24 and the rotating annular shell plate 13. The supporting annular plate 12 is welded to the inner wall of the annular side plate 1. The rotating annular shell plate 13 is movably connected to the supporting annular plate 12. The upper annular cover plate 24, the rotating annular shell plate 13, the annular rotating inner sealing plate 28, and the annular bottom plate 26 form an annular material movement channel 29. Several suspended pushing scrapers 19 and at least one bottom unloading scraper 22 are welded around the annular material movement channel 29 between the rotating annular shell plate 13 and the annular rotating inner sealing plate 28. A discharge hopper 21 is provided on the upper annular cover plate 24. The discharge hopper 21 can be one or more depending on the amount of material supplied, and they are evenly arranged around the circumference. The number of discharge hoppers and discharge ports can be different. The discharge hopper 21 is connected to the annular material movement channel 29. A material discharge port and a discharge plate 20 are provided in front of the bottom unloading scraper 22. The discharge plate 20 has a variable cross-section, with its shape gradually decreasing from the outside to the inside. This ensures that the material is evenly distributed radially as it slides down the discharge plate 20 into the internal space. Furthermore, the rotation of the discharge plate 20 further guarantees uniform material distribution across the entire internal cross-section. The number of material discharge ports 30 is the same as the number of bottom-feeding scrapers 22 and discharge plates 20. Except for the bottom-feeding scrapers 22 installed within the material discharge ports 30, all other locations use suspended pushing scrapers 19. A certain distance is maintained between the suspended pushing scrapers 19 and the annular base plate 26 within the annular material movement channel 29; the size of this distance determines the material layer height within the annular material movement channel 29. Only a small gap is reserved between the bottom-feeding scrapers 22 and the annular base plate 26 to prevent friction between them as the bottom-feeding scrapers 22 rotate with the rotating annular shell plate 13. The suspended pushing scraper 19 is responsible for spreading the material falling into the annular material moving channel 29 to a certain height along the annular material moving channel 29, while the bottom discharge scraper 22 is responsible for pushing the spread material through the material discharge port 30 onto the variable cross-section rotating discharge plate 20. The bottom discharge scraper 22 pushes the material through the material discharge port 30 onto the discharge plate 20, and finally it falls evenly into the large cross-section furnace. The suspended pushing scraper 19 can be either a fixed scraper or a movable scraper. The movable scraper is mainly used to deal with the possibility of jamming during the material pushing process. In this case, the upper end of the scraper is suspended in the form of a shaft or hinge, and the lower end is restricted in movement under the pull of a spring. In this way, when the pushing jamming occurs, the movable scraper can rotate to a certain extent, thereby avoiding jamming. The optimal arrangement position of the material discharge port 30 and the bottom discharge scraper 22 is to be located adjacent to the material discharge hopper 21.
[0025] A heat pipe condensation section 3 is installed inside the annular cooling water tank 2. The heat pipe condensation section 3 is connected to the heat pipe evaporation section 5 through a heat pipe connecting pipe 4. The heat pipe condensation section 3 is fixed to the rotating annular shell plate by bolts or welding and rotates together with the rotating annular shell plate 13. The heat pipe evaporation section 5 is arranged on the variable cross-section rotating unloading plate 20 or other rotating components that need to be cooled, such as the rotating annular shell plate 13.
[0026] A gear reduction drive motor 6 is mounted on the upper annular cover plate 24. The gear reduction drive motor 6 meshes with a large gear ring 7. The large gear ring 7 is fixedly connected to the rotating annular shell plate 13 via circumferentially distributed shaft-shaped connecting rods 10. Each shaft-shaped connecting rod 10 is fitted with a support roller 9. The support roller 9 rotates within an annular track composed of an upper guide rail 8 and a lower guide rail 11. The upper guide rail 8 is fixed to the upper annular cover plate 24 by welding, bolts, or threads. The lower guide rail 11 is fixed to the support annular plate 12 by welding, bolts, or threads. Driven gears 18 are evenly distributed on the outer circumference of the large gear ring 7, and the driven gears 18 mesh with the large gear ring 7.
[0027] Of course, the above description is not intended to limit the present invention, and the present invention is not limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present invention should also fall within the protection scope of the present invention.
Claims
1. A ring-shaped feeding device suitable for uniform fabric distribution with large cross-section, comprising a housing and a rotating fabric distribution section within the housing, characterized in that, The outer shell includes a circular bottom plate, a circular side plate, and an upper circular cover plate. The rotating fabric distribution section includes a rotating circular shell plate and a circular rotating inner sealing plate. A circular water baffle is provided on the inner side of the circular side plate and is welded to the circular bottom plate. The circular water baffle, the circular bottom plate, and the circular side plate form a circular cooling water tank. A supporting circular plate is provided between the upper circular cover plate and the rotating circular shell plate and is welded to the inner wall of the circular side plate. The rotating circular shell plate is movably connected to the supporting circular plate. The upper circular cover plate, the rotating circular shell plate, the circular rotating inner sealing plate, and the circular bottom plate form a circular material movement channel. Several suspended pushing scrapers and at least one bottom unloading scraper are welded between the rotating circular shell plate and the circular rotating inner sealing plate and distributed along the circular material movement channel. A discharge hopper is provided on the upper circular cover plate and is connected to the circular material movement channel. A material discharge port and a discharge plate are provided on the front side of the bottom unloading scraper. The annular cooling water tank is equipped with a heat pipe condensation section, which is connected to the heat pipe evaporation section through a heat pipe connecting pipe. The heat pipe condensation section is fixed to the rotating annular shell plate by bolts or welding, and the heat pipe evaporation section is arranged on any rotating part that needs to be cooled. The annular bottom plate is directly fixed to the furnace shell plate by welding. The outer ring flange plate is welded to the upper end of the annular side plate, and the inner ring flange plate is welded to the furnace shell plate. The upper annular cover plate is fixed to the inner ring flange plate and the outer ring flange plate by bolt connection. The unloading plate is welded to the annular rotating inner sealing plate. The cross-section of the unloading plate is a variable cross-section, which gradually decreases from the outside to the inside. A gear reduction drive motor is installed on the upper annular cover plate. The gear reduction drive motor meshes with a large gear ring. The large gear ring is fixedly connected to the rotating annular shell plate through circumferentially distributed shaft-shaped connecting rods. Each shaft-shaped connecting rod is fitted with a support roller. The support roller rotates in an annular track composed of an upper guide rail and a lower guide rail. The upper guide rail is fixed to the upper annular cover plate by welding, bolts, or threads. The lower guide rail is fixed to the support annular plate by welding, bolts, or threads.
2. The annular feeding device suitable for uniform fabric distribution with large cross-section as described in claim 1, characterized in that, Driven gears are evenly distributed on the outer circumference of the large gear ring, and the driven gears mesh with the large gear ring.
3. The annular feeding device suitable for uniform fabric distribution with large cross-sections according to claim 1, characterized in that, The suspended material pushing scraper maintains a certain distance from the annular base plate, while the bottom unloading scraper has a very small gap with the annular base plate; the suspended material pushing scraper can be a fixed scraper or a movable scraper.
4. The annular feeding device suitable for uniform fabric distribution with large cross-section according to claim 1, characterized in that, One or more unloading hoppers are arranged circumferentially; the number of unloading ports is the same as the number of bottom unloading scrapers and unloading plates.
5. The annular feeding device suitable for uniform fabric distribution with large cross-section according to claim 1, characterized in that, The outer bottom of the circular base plate has several supporting ribs distributed circumferentially.
6. A method of using the annular feeding device for uniformly distributed large-section fabric according to any one of claims 1-5, characterized in that, Material enters the annular material moving channel from the discharge hopper. The suspended pushing scraper in the annular material moving channel flattens the material falling into the annular material moving channel to a certain height. The bottom discharge scraper pushes the flattened material through the material discharge port onto the discharge plate. The discharge plate rotates with the inner sealing plate of the annular rotation, so that when the material slides down through the discharge plate into the internal space, the material will be evenly distributed radially.