Vertical drying furnace for zinc-containing cold briquettes
The spiral hollow hot air pipe and diversion column design of the vertical drying furnace solves the problem of uneven drying, achieves uniform drying and efficient heat transfer of cold pressed blocks, and improves the quality and economic benefits of the zinc smelting process.
Patent Information
- Application Number
- CN202422813103.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-19
- Publication Date
- 2025-09-12
- Estimated Expiration
- 2034-11-19
AI Technical Summary
In the existing drying furnace design, high-temperature gas is introduced from the bottom of the furnace, resulting in low heat transfer efficiency and uneven drying of the cold pressed blocks, causing some cold pressed blocks to be over-dried or not dried, resulting in economic losses.
The vertical drying furnace design is adopted, including spiral hollow hot air pipes and diverter columns. The high-temperature gas is evenly distributed through the spiral hollow hot air pipes. The diverter columns make the cold pressed blocks evenly dispersed. Combined with the diverter and the baffle, a uniform heating channel is formed to improve the heat transfer efficiency and drying uniformity.
The uniform drying of the cold pressed blocks is achieved, the drying speed and efficiency are improved, the breakage of the cold pressed blocks is reduced, and the heat utilization rate and economic benefits are improved.
Smart Images
Figure CN223332114U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of cold pressing block drying equipment, in particular to a vertical drying furnace for zinc-containing cold pressed blocks. Background Art
[0002] Drying furnaces are crucial production equipment in the metallurgical industry, primarily used for drying mineral raw materials after cold pressing and agglomeration. In the slag zinc recovery process, high-temperature drying of zinc-containing cold agglomerates in a drying furnace helps remove impurities, such as moisture and other volatile components, from the material. These impurities can affect zinc purity and chemical reactions during the smelting process. Proper drying can optimize raw material quality, thereby increasing the metallization rate of zinc recovered in the vertical furnace. Therefore, drying furnaces play an indispensable role in zinc metallurgy, serving as a key component of ensuring a smooth zinc smelting process and improving final product quality. Currently available drying furnace designs, both domestically and internationally, typically introduce high-temperature gas from the furnace bottom. This accumulation of cold agglomerates results in low heat transfer efficiency and uneven drying. This means that the top agglomerates cannot be dried efficiently, and the bottom agglomerates can break under the pressure and excessive drying conditions. This design flaw can lead to overdrying of some sections of the furnace while leaving others wet, resulting in significant economic losses. Utility Model Content
[0003] The purpose of the utility model is to provide a vertical drying furnace for zinc cold-forming blocks to solve the above problems and to improve the problem of untimely heat transfer and uneven drying caused by the accumulation of high-temperature gas at the bottom of the furnace.
[0004] To achieve the above-mentioned purpose, the present invention provides the following solution: a vertical drying furnace for cold-forming zinc blocks, comprising:
[0005] A furnace body, wherein a sealed silo and a discharge hopper are respectively provided at the top and bottom of the furnace body, a vertical drying kiln is provided in the furnace body, the sealed silo is connected to the top of the vertical drying kiln through a valve, and the discharge hopper is connected to the bottom of the vertical drying kiln, a diverter column is provided in the vertical drying kiln, a diverter member is provided on the diverter column, and an on-off control member is provided between the diverter column and the discharge hopper;
[0006] The spiral hollow hot air pipe is arranged on the inner wall of the vertical drying kiln, and a plurality of exhaust holes are opened on the side wall of the spiral hollow hot air pipe.
[0007] Preferably, the spiral hollow hot air pipe is spirally upward from the bottom of the inner side wall of the vertical drying kiln and is evenly fixed and coiled on the side wall of the vertical drying kiln. The bottom of the spiral hollow hot air pipe is connected to an air inlet, and the top of the spiral hollow hot air pipe is connected to an air outlet, and the air outlet is connected to a directional induced draft fan.
[0008] Preferably, the diverter column includes 0 groups of short metal tubes connected in sequence from top to bottom, two adjacent short metal tubes are slidably connected, the top of the short metal tube at the top is fixedly connected to the top of the vertical drying kiln, and the on-off control component is arranged between the short metal tube at the bottom and the inner side of the diverter column.
[0009] Preferably, the on-off control component includes a diverter hood, which is fixedly connected to the bottom of the metal short tube located at the bottom, and the diverter hood is adapted to the discharge hopper. A telescopic mechanism is provided on the top of the vertical drying kiln, and the telescopic mechanism is located on the inner side of the diverter column. The telescopic end of the telescopic mechanism is fixedly connected to the metal short tube located at the bottom.
[0010] Preferably, the diverter includes a plurality of first baffles, and the outer walls of the plurality of metal short tubes are respectively fixedly connected with the first baffles, and the plurality of first baffles are arranged obliquely, and the lower ends of the plurality of first baffles are oriented toward the direction of the spiral hollow hot air pipe;
[0011] A number of second baffle plates are fixedly connected to the outer wall of the spiral hollow hot air duct, and the second baffle plates are arranged at an angle, and the lower ends of the second baffle plates are facing the direction of the diversion column. The second baffle plates and the first baffle plates are installed in equal numbers in the vertical direction and at the same installation height.
[0012] Preferably, two groups of radar level meters are provided on the inner wall of the sealed silo from top to bottom.
[0013] Preferably, a pressure sensor is installed on the diversion material cover, and the pressure sensor is located in the vertical drying kiln.
[0014] Compared with the prior art, the present invention has the following advantages and technical effects:
[0015] 1. The vertical drying furnace of the utility model is provided with a spiral hollow hot air pipe, and the zinc-containing cold-pressed blocks are evenly stacked in the storage space of the vertical drying kiln. The high-temperature dry gas discharged by the spiral hollow hot air pipe simultaneously performs high-temperature drying on the cold-pressed blocks in different areas of the furnace, thereby increasing the contact area between the high-temperature gas and the cold-pressed blocks, providing a more uniform heating method, and realizing rapid drying.
[0016] 2. The vertical drying furnace of the utility model arranges diverter columns and diverter pieces in the furnace cavity, so that the cold-cast blocks are evenly dispersed in the space between the furnace wall and the diverter columns, thus solving the problem that the cold-cast blocks in the center of the furnace cannot be dried. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.
[0018] Figure 1 This is a cross-sectional view of the vertical drying furnace of the utility model;
[0019] Figure 2 This is a front view of the vertical drying furnace of the utility model;
[0020] Figure 3 This is a top view of the vertical drying furnace of the utility model;
[0021] Figure 4 This is a schematic diagram of the telescopic mechanism of the utility model;
[0022] Among them, 1. Radar level meter; 2. Support plate; 3. Spiral hollow hot air pipe; 4. Air inlet; 5. Support plate; 6. Sealed silo; 7. Diverter column; 8. Air outlet; 9. First baffle plate; 10. Diverter cover; 11. Discharge hopper; 12. Furnace body; 13. Vertical drying kiln; 71. Metal short tube; 14. Second baffle plate; 15. Motor; 16. Screw; 17. Slide rail; 18. Sliding rod. DETAILED DESCRIPTION
[0023] 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. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.
[0024] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific implementation methods.
[0025] Reference Figure 1-Figure 4 The utility model provides a vertical drying furnace for cold-forming zinc blocks, comprising:
[0026] A furnace body 12 is provided with a sealed silo 6 and a discharge hopper 11 at the top and bottom of the furnace body 12, respectively. A vertical drying kiln 13 is provided in the furnace body 12. The sealed silo 6 is connected to the top of the vertical drying kiln 13 through a valve. The discharge hopper 11 is connected to the bottom of the vertical drying kiln 13. A diverter column 7 is provided in the vertical drying kiln 13. A diverter component is provided on the diverter column 7. An on-off control component is provided between the diverter column 7 and the discharge hopper 11.
[0027] The spiral hollow hot air pipe 3 is arranged on the inner wall of the vertical drying kiln 13, and a plurality of exhaust holes are opened on the side wall of the spiral hollow hot air pipe 3.
[0028] The main function of the sealed silo 6 is to temporarily store zinc-containing cold blocks and feed them into the vertical drying kiln 13 through a valve; the main function of the discharge hopper 11 is to discharge the zinc-containing cold blocks dried in the vertical drying kiln 13; the main function of the diverter is to evenly disperse the cold blocks in the vertical drying kiln 13; the main function of the on-off control component is to block the discharge hopper 11 during the drying process, and open the discharge hopper 11 after the cold blocks are dried so that the cold blocks can be discharged from the discharge hopper 11; the main function of the spiral hollow hot air pipe 3 is to simultaneously dry the cold blocks at all heights in the furnace body 12 through the exhaust holes distributed from bottom to top on the side of the vertical drying kiln 13, thereby improving the efficiency and uniformity of drying. Overall, the utility model can effectively improve the problem of untimely heat transfer caused by the accumulation of high-temperature gas at the bottom of the furnace, and greatly improve the drying speed of cold pressed blocks.
[0029] To further optimize the solution, the spiral hollow hot air pipe 3 spirals upward from the bottom of the inner wall of the vertical drying kiln 13 and is evenly fixed and coiled on the side wall of the vertical drying kiln 13. The bottom of the spiral hollow hot air pipe 3 is connected to the air inlet 4, and the top of the spiral hollow hot air pipe 3 is connected to the air outlet 8, and the air outlet 8 is connected to the induced draft fan.
[0030] like Figure 1 As shown, high-temperature gas is blown into the spiral hollow hot air pipe 3 through the air inlet 4, flowing upward along the spiral hollow hot air pipe 3 to dry the cold blocks in the vertical drying kiln 13. The outgoing induced draft fan, located outside the air outlet 8, has an air volume of 7800 Nm³ / h and a pressure of -200 Pa. The spiral hollow hot air pipe 3 can raise the temperature in the vertical drying kiln 13 to 800°C.
[0031] A further optimized solution is that the diverter column 7 includes 10 groups of metal short tubes 71 connected in sequence from top to bottom, and two adjacent metal short tubes 71 are slidingly connected. The top of the metal short tube 71 at the top is fixedly connected to the top of the vertical drying kiln 13, and the on-off control component is arranged between the metal short tube 71 at the bottom and the inner side of the diverter column 7.
[0032] like Figure 1As shown, a plurality of metal short tubes 71 are nested with each other, so that the diverter column 7 forms a freely retractable metal hose.
[0033] To further optimize the solution, the on-off control component includes a diverter hood 10, which is fixedly connected to the bottom of the metal short tube 71 at the bottom. The diverter hood 10 is compatible with the discharge hopper 11. A telescopic mechanism is provided on the top of the vertical drying kiln 13. The telescopic mechanism is located on the inner side of the diverter column 7, and the telescopic end of the telescopic mechanism is fixedly connected to the metal short tube 71 at the bottom.
[0034] A further optimized solution is that the telescopic mechanism includes two sets of slide rails 17 vertically fixedly connected to the top of the inner side of the furnace body 12, the two sets of slide rails 17 are located inside the diversion column 7, and a sliding rod 18 is slidably connected between the two sets of slide rails 17. The bottom of the sliding rod 18 is fixedly connected to the bottom of the metal short tube 71 located at the bottom, and the top of the inner side of the furnace body 12 is fixedly connected to the motor 15. The output shaft of the motor 15 is coaxially fixedly connected to the screw rod 16, and the screw rod 16 is transmission-connected to the top of the sliding rod 18.
[0035] like Figure 1 and Figure 4 As shown, after the cold-cast blocks are dried, a control unit (not shown) controls the motor 15 to rotate, driving the screw 16. The screw 16 rotates, driving the sliding rod 18 upward along the slide rail 17 through the bolt transmission, thereby lifting the metal short tube 71 at the bottom and the diverter hood 10, which is then lifted and disengaged from the discharge hopper 11, allowing the cold-cast blocks to be discharged smoothly from the discharge hopper 11. Controlling the motor 15 in reverse can cause the diverter hood 10 to re-block the discharge hopper 11. The control unit is a common device in the field, and its working principle and working process will not be described in detail.
[0036] Further optimized, the diverter includes a plurality of first baffle plates 9, and the outer walls of the plurality of metal short tubes 71 are respectively fixedly connected with the first baffle plates 9, and the plurality of first baffle plates 9 are arranged obliquely, and the lower ends of the plurality of first baffle plates 9 are facing the direction of the spiral hollow hot air pipe 3;
[0037] A number of second baffle plates 14 are fixedly connected to the outer wall of the spiral hollow hot air pipe 3. The second baffle plates 14 are arranged at an angle, and the lower ends of the second baffle plates 14 are facing the direction of the diversion column 7. The second baffle plates 14 and the first baffle plates 9 are installed in equal numbers in the vertical direction and at the same installation height.
[0038] According to a further optimized solution, the outward inclination angles of the first baffle plate 9 and the second baffle plate 14 are both 30°.
[0039] like Figure 1As shown, the diverter column 7 includes 10 groups of short metal tubes 71, with a total of 9 layers of first baffles 9. Correspondingly, 9 layers of second baffles 14 are provided on the side wall of the spiral hollow hot air pipe 3, and the same number of first baffles 9 and second baffles 14 have the same height.
[0040] In the present invention, the first baffle plate 9 and the second baffle plate 14 are provided to isolate the cold-cast blocks from the spiral hollow hot air pipe 3, forming a trumpet-shaped channel that is larger at the top and smaller at the bottom, thereby effectively reducing the accumulation of cold-cast blocks in the depressions of the spiral hollow hot air pipe 3, avoiding blockage caused by the accumulation of cold-cast blocks and cracking caused by prolonged blockage of the cold-cast blocks.
[0041] To further optimize the solution, two groups of radar level meters 1 are provided on the inner wall of the sealed silo 6 from top to bottom.
[0042] As a further optimization, automatic valves are installed at the top and bottom of sealed silo 6 for feeding and discharging materials into vertical drying kiln 13. A radar level meter 1 located at the top monitors the maximum storage height of sealed silo 6, while a radar level meter located at the bottom monitors the minimum storage height of sealed silo 6. Feeding is stopped when the radar level meter 1 at the top detects cold blocks, and resumed when the radar level meter at the bottom detects no cold blocks.
[0043] According to a further optimized solution, a pressure sensor (not shown in the figure) is installed on the diversion material cover 10 , and the pressure sensor is located in the vertical drying kiln 13 .
[0044] like Figure 1 As shown, the pressure sensor can monitor the weight of the cold agglomerated material in the vertical drying kiln 13 and stop the sealed silo 6 from feeding the material into the vertical drying kiln 13 when the weight reaches a specified value.
[0045] Further optimization scheme, such as Figure 1 and Figure 2 As shown, eight groups of support plates 2 are fixedly connected between the bottom of the side wall of the sealed silo 6 and the top of the furnace body 12 .
[0046] According to a further optimized solution, the bottom of the side wall of the furnace body 12 is connected to the furnace bottom through 8 groups of support plates 5.
[0047] The working process of this embodiment is as follows:
[0048] Zinc-containing cold-cast blocks are fed into a sealed silo 6 via a screw feeder. When the radar level meter 1 located high inside the silo detects that the pile of zinc-containing cold-cast blocks has reached the required height, feeding is stopped and the automatic valve at the top of the silo 6 automatically closes. The automatic valve at the bottom of the silo opens, and the cold-cast blocks fall from the silo 6 into the vertical drying kiln 13. Inside the vertical drying kiln 13, the cold-cast blocks follow the first and second baffles 9 and 14, and accumulate at the bottom. Feeding into the vertical drying kiln 13 is stopped when the pressure sensor on the diversion hood 10 detects that the weight of the cold-cast blocks in the vertical drying kiln 13 is sufficient. When the radar level meter 1 located low inside the silo detects that the pile of cold-cast blocks has fallen below the minimum height, the automatic valve at the top of the silo opens and feeding begins. Simultaneously, high-temperature gas is blown in through the air inlet 4 of the spiral hollow hot air pipe 3, flowing upward along the spiral hollow hot air pipe 3 to dry the cold-cast blocks in the vertical drying kiln 13. During the drying process, water vapor and dust shed from the briquettes are carried out of the drying furnace exhaust at the outlet 8 and sent to the bag dust collector. After drying is completed, the motor 15 in the diverter column 7 is turned on, the diverter column 7 rises upward, the diverter cover 10 is separated from the discharge hopper 11, and the cold briquettes are discharged from the discharge hopper 11 and enter the subsequent intermediate drying furnace along the screw discharger.
[0049] The tail gas from the vertical drying furnace blown out from the air outlet 8 is passed into the dezincification reactor after treatment. The high-temperature tail gas discharged from the dezincification reactor can be used as a drying source and passed into the spiral hollow hot air pipe 3 again to recycle the heat source.
[0050] The drying furnace of the utility model can build an efficient closed-loop system by recycling the drying furnace exhaust gas and heat generated in the reaction process, achieving ultra-low emissions and high heat utilization, and improving the thermal efficiency to 75%.
[0051] In the description of the present invention, it should be understood that the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the present invention.
[0052] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Without departing from the spirit of the present invention, various modifications and improvements to the technical solutions of the present invention made by ordinary technicians in this field should fall within the scope of protection determined by the claims of the present invention.
Claims
1. A vertical drying furnace for cold-molded zinc blocks, characterized in that: include: A furnace body (12), wherein a sealed silo (6) and a discharge hopper (11) are respectively provided at the top and bottom of the furnace body (12), a vertical drying kiln (13) is provided in the furnace body (12), the sealed silo (6) is communicated with the top of the vertical drying kiln (13) through a valve, the discharge hopper (11) is communicated with the bottom of the vertical drying kiln (13), a diverter column (7) is provided in the vertical drying kiln (13), a diverter member is provided on the diverter column (7), and an on-off control member is provided between the diverter column (7) and the discharge hopper (11); A spiral hollow hot air pipe (3) is provided on the inner wall of the vertical drying kiln (13), and a plurality of exhaust holes are provided on the side wall of the spiral hollow hot air pipe (3).
2. A vertical drying furnace for cold-cast zinc blocks according to claim 1, characterized in that: The spiral hollow hot air pipe (3) spirally upwards from the bottom of the inner side wall of the vertical drying kiln (13) and is evenly fixed and coiled on the side wall of the vertical drying kiln (13); the bottom of the spiral hollow hot air pipe (3) is connected to an air inlet (4); the top of the spiral hollow hot air pipe (3) is connected to an air outlet (8); and the air outlet (8) is connected to a directional induced draft fan.
3. A vertical drying furnace for zinc-containing cold-cast agglomerates according to claim 1, characterized in that: The diverter column (7) includes 10 groups of metal short tubes (71) connected in sequence from top to bottom, two adjacent metal short tubes (71) are slidably connected, the top of the metal short tube (71) located at the top is fixedly connected to the top of the vertical drying kiln (13), and the on-off control component is arranged between the metal short tube (71) located at the bottom and the inner side of the diverter column (7).
4. A vertical drying furnace for cold-cast zinc blocks according to claim 3, characterized in that: The on-off control component includes a diverter hood (10), which is fixedly connected to the bottom of the metal short tube (71) located at the bottom. The diverter hood (10) is adapted to the discharge hopper (11). A telescopic mechanism is provided on the top of the vertical drying kiln (13), which is located on the inner side of the diverter column (7). The telescopic end of the telescopic mechanism is fixedly connected to the metal short tube (71) located at the bottom.
5. A vertical drying furnace for cold-cast zinc blocks according to claim 3, characterized in that: The diverter comprises a plurality of first baffle plates (9), the outer walls of the plurality of metal short tubes (71) are respectively fixedly connected with the first baffle plates (9), the plurality of first baffle plates (9) are arranged at an angle, and the lower ends of the plurality of first baffle plates (9) face the direction of the spiral hollow hot air pipe (3).
6. A vertical drying furnace for cold-cast zinc blocks according to claim 5, characterized in that: A plurality of second baffle plates (14) are fixedly connected to the outer wall of the spiral hollow hot air pipe (3), and the plurality of second baffle plates (14) are arranged at an angle, and the lower ends of the plurality of second baffle plates (14) face the direction of the diversion column (7), and the plurality of second baffle plates (14) and the plurality of first baffle plates (9) are installed in equal numbers in the vertical direction and at the same installation height.
7. A vertical drying furnace for zinc-containing cold-cast agglomerates according to claim 1, characterized in that: Two groups of radar level meters (1) are arranged on the inner wall of the sealed material bin (6) from top to bottom.
8. A vertical drying furnace for cold-cast zinc blocks according to claim 4, characterized in that: A pressure sensor is installed on the diversion material cover (10), and the pressure sensor is located in the vertical drying kiln (13).