Vertical material drying device

Abstract

The present application provides a vertical material drying device, relates to a pellet drying equipment field, and comprises a drying furnace, a plurality of groups of mounting racks are arranged equidistantly along a height direction in the drying furnace, a fixed plate is symmetrically arranged on each group of mounting racks, a driving shaft and a driven shaft are rotatably connected between the two fixed plates, the driving shaft is connected with a driving assembly, and two driving sprockets are arranged on the driving shaft; the device can fully dry the pellets, the residence time of the pellets in the drying furnace is further prolonged and the pellets are turned over at any time, the pellets cannot be blocked during the process of falling from the upper layer of the conveying belt into the inner cavity, the conveying frame can be deflected by 90 degrees and then can be reset in the lower layer to convey the pellets in the inner cavity, the pellets on each conveying belt can be dried once in the inner and outer circulation, the drying effect is good, and the device is suitable for conveying large mass and volume pellets.

Description

Technical Field

[0001] This invention relates to the field of pellet drying equipment, and more specifically, to a vertical material drying device. Background Technology

[0002] The production process of iron ore pellets places very strict requirements on the physicochemical properties of the iron concentrate. Among these, the moisture content of the iron concentrate has a significant impact on the pelletizing performance. To ensure the stability of the iron concentrate moisture content, a drying process is required in the pelletizing production line. Currently, pellets are fed into a drying furnace for drying. Traditional drying furnaces can only adjust the drying effect by controlling the air volume and temperature. The material residence time in the drying furnace is short, resulting in insufficient drying. Furthermore, after drying, the pellets need to be screened by particle size, and those with excessively small particle sizes should be discarded. Currently, these two processes are completed in different devices.

[0003] To prolong the drying effect of pellets in the drying oven, in the existing technology, several chain conveyor belts are set up along the height of the drying oven. The pellets move sequentially from the top chain conveyor belt to the bottom chain conveyor belt in a gradient discharge manner. In this method, the number of drying cycles of the pellets is determined by the number of chain conveyor belts. One chain conveyor belt can only realize one drying operation of the pellets. Moreover, after drying, the pellets need to be transferred as a whole to a screening device to remove pellets with unqualified particle size. Screening cannot be carried out in real time during the drying process. Summary of the Invention

[0004] The purpose of this invention is to solve the problems mentioned in the background art, and thus to propose a vertical material drying device.

[0005] The technical solution adopted by this invention to solve its technical problem is: A vertical material drying device includes a drying furnace. Several sets of mounting frames are equidistantly arranged along the height direction inside the drying furnace. Each set of mounting frames has symmetrically arranged fixed plates. A drive shaft and a driven shaft are rotatably connected between two fixed plates. The drive shaft is connected to a drive assembly and has two drive sprockets. The driven shaft has two driven sprockets. The drive and driven sprockets on the same side are driven by a transmission chain. Several support plates are rotatably connected to the two transmission chains. Several through holes are formed on the support plates for real-time screening during the pellet drying process. The fixed plate is provided with two symmetrical first guide rails and two symmetrical second guide rails distributed vertically. The first guide rails and the second guide rails are arranged in the horizontal direction. The first guide rail is located in the middle gap of the transmission chain, and the second guide rail is located below the transmission chain. A material dropping space is formed between the first guide rail and the second guide rail. Each support plate cooperates with the first guide rail and the second guide rail in sequence so that the support plate is in a vertical state when it is detached from the first guide rail or the second guide rail for pellet dropping. When two adjacent support plates are in contact with the first guide rail or the second guide rail, they are in contact.

[0006] This device can achieve thorough drying of pellets, further extending the residence time of the pellets in the drying oven and constantly turning them over. At the same time, the pellets will not be blocked as they fall from the upper layer of the conveyor belt into the inner cavity. The conveyor frame can deflect 90 degrees and then reset at the lower layer to transport the pellets in the inner cavity. Each conveyor belt can perform one internal and external circulation drying cycle, resulting in excellent drying effect and suitability for conveying large-mass and high-volume pellets.

[0007] Furthermore, the support plate is provided with a first roller and a second roller symmetrically distributed on both sides. The first roller is rotatably connected to the transmission chain, and the second roller is distributed at intervals with the transmission chain. The second roller cooperates with the first guide rail and the second guide rail in sequence to reduce wear between the support plate and the first guide rail and the second guide rail.

[0008] Furthermore, a section of the first guide rail and the second guide rail are inclined to facilitate the smooth movement of the second roller.

[0009] The above solution can further extend the service life of the support plate.

[0010] Furthermore, the support plate has a placement groove, and the bottom surface of the placement groove has several through holes.

[0011] The through holes in the above scheme can not only transfer heat upwards, but also screen the pellets in real time during the uniform drying process to remove pellets with smaller particle sizes. The placement trough can prevent the pellets from moving around on the support plate and falling directly through the gaps in the transmission chain.

[0012] Furthermore, each set of mounting brackets has symmetrically arranged slide rails on the mounting brackets near the driven shaft side, with sliders slidingly fitted on the slide rails and bearing seats on the sliders. The fixed plate has symmetrically opened moving holes that allow the driven shaft to make fine adjustments to its horizontal position. The two ends of the driven shaft pass through the moving holes and the bearing seats respectively, and the slider is connected to a counterweight assembly.

[0013] Furthermore, the counterweight assembly includes mounting rods, pulley blocks, wire ropes, and counterweight blocks. Mounting rods corresponding to mounting frames are arranged along the height direction on the outer wall of the drying oven. Pulley blocks are installed on the mounting rods, wire ropes are wound on the pulley blocks, one end of the wire ropes is connected to a slider, and counterweight blocks are installed on the pulley blocks.

[0014] The above solution uses pulley blocks, wire ropes, and counterweights to allow the two bearing seats to be finely adjusted on the slide rail, thereby tensioning the transmission chain. This prevents the transmission chain and support plate from malfunctioning and disengaging under high-temperature conditions, ensuring the stability and safety of the conveyor belt during operation in high-temperature environments.

[0015] Furthermore, the drying furnace is provided with a feeding channel, a pellet discharge port, and several non-selected pellet discharge ports. The feeding channel is located at the top of the drying furnace, and the pellet discharge port and the non-selected pellet discharge port are located at the bottom of the drying furnace, with the pellet discharge port located on one side of the several non-selected pellet discharge ports.

[0016] Furthermore, the drying oven is equipped with a dehumidification component.

[0017] Furthermore, the dehumidification assembly includes a high-temperature dehumidification device and a dehumidification pipe. The high-temperature dehumidification device is installed on the drying oven, and a dehumidification pipe and a temperature and humidity sensor connected to the high-temperature dehumidification device are installed at the top of the drying oven. Several branch pipes are installed on the dehumidification pipe.

[0018] The above solution uses temperature and humidity sensors to detect the humidity in the upper part of the drying oven in real time. When the humidity content is too high, the controller will activate the high-temperature dehumidification equipment to quickly absorb and process the moisture, thus further ensuring the drying effect of the pellets and avoiding excessive moisture content in the drying oven.

[0019] Compared with the prior art, the beneficial effects of the present invention are: 1. This device can achieve thorough drying of pellets, further extending the residence time of the pellets in the drying oven and constantly turning them over. The support plate can be deflected by 90 degrees and then reset in the lower (or upper) layer to transport the pellets in the inner cavity. Each conveyor belt can perform one internal and external circulation drying, resulting in excellent drying effect.

[0020] 2. In addition, this device can screen in real time during the drying process through the through hole to remove pellets with smaller particle size, thereby completing the multiple transfer drying process of pellets with qualified particle size, without the need for secondary processing by passing them through screening equipment.

[0021] 3. The through holes in this device can also allow heat to flow upwards, thereby further improving the drying effect on the pellets. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the support plate installation. Figure 3 for Figure 2 Enlarged view of section A (labeled A); Figure 4 This is a schematic diagram showing the connection between the first roller and the mounting plate; Figure 5 This is a schematic diagram showing the fit between the second guide rail and the second roller; Figure 6 This is a schematic diagram showing the connection between the first guide rail and the second roller; Figure 7 for Figure 1 Enlarged view of section B (reference number B); Figure label: 1. Drying oven; 11. Feeding channel; 12. Pellet discharge port; 13. Pellet discharge port; 2. Mounting frame; 201. Fixing plate; 211. Mounting plate; 212. Support plate; 213. First roller; 214. Second roller; 215. Placement groove; 2151. Through hole; 216. First guide rail; 22. Driven shaft; 23. Bearing seat; 31. Slide rail; 32. Sliding block; 33. Mounting rod; 34. Pulley block; 35. Steel wire rope; 36. Counterweight; 4. Second guide rail; 51. High temperature dehumidification equipment; 52. Dehumidification pipe; 53. Branch pipe. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. The present invention will be further described with reference to the accompanying drawings and embodiments: like Figures 1 to 7As shown, a vertical material drying device includes a drying furnace 1. The drying furnace 1 contains a drying component for pellet drying. The drying component is based on existing technology and is not shown in the figure. Several sets of mounting frames 2 are equidistantly arranged along the height direction inside the drying furnace 1. Each set includes two frames symmetrically distributed inside the drying furnace 1. Each set of mounting frames 2 has a symmetrically arranged fixing plate 201. A drive shaft and a driven shaft 22 are rotatably connected between the two fixing plates 201. The drive shaft is connected to a drive assembly and has two drive sprockets. The driven shaft 22 has two driven sprockets. The drive sprockets and driven sprockets on the same side are connected by a transmission chain. The drive assembly, drive shaft, drive sprockets, driven sprockets, and transmission chain are shown in the figure but not labeled. Their specific connections are based on existing technology and are not modified. Several sets of mounting plates 211 are symmetrically arranged on two transmission chains. A support plate 212 is rotatably connected between two mounting plates 211. The support plate 212 has several through holes 2151 for real-time screening during the pellet drying process to remove pellets with smaller particle sizes. The fixed plate 201 is provided with two symmetrical first guide rails 216 and two symmetrical second guide rails 4 distributed vertically. The first guide rails 216 and the second guide rails 4 are arranged horizontally. The first guide rails 216 are located in the middle gap of the transmission chain, and the second guide rails 4 are located below the transmission chain. A material dropping space is formed between the first guide rails 216 and the second guide rails 4. Each support plate 212 cooperates with the first guide rail 216 and the second guide rail 4 in sequence so that when the support plate 212 is detached from the first guide rail 216 or the second guide rail 4, it is in a vertical state for pellet dropping. When two adjacent support plates 212 are in contact with the first guide rail 216 or the second guide rail 4, they are in contact.

[0024] Further refinements of the embodiments of the present invention, such as... Figures 1 to 7 As shown, a first roller 213 and a second roller 214 are symmetrically distributed on both sides of the support plate 212. The first roller 213 is rotatably connected to the transmission chain, and the second roller 214 is distributed at intervals with the transmission chain. The second roller 214 cooperates with the first guide rail 216 and the second guide rail 4 in sequence to reduce wear between the support plate 212 and the first guide rail 216 and the second guide rail 4.

[0025] Further optimizations of the above-described embodiments, such as... Figures 1 to 7 As shown, a section of the first guide rail 216 and the second guide rail 4 is inclined to facilitate the smooth movement of the second roller 214; this can further extend the service life of the support plate 212.

[0026] Further optimization of the plan, such as Figure 2As shown, a placement groove 215 is provided on the support plate 212, and several through holes 2151 are provided on the bottom surface of the placement groove 215. The through holes 2151 can not only transfer heat upward, but also screen the pellets in real time during the uniform drying process to remove pellets with smaller particle size.

[0027] Further refinements of the embodiments of the present invention, such as... Figure 1 As shown, the drying furnace 1 is provided with a feeding channel 11, a pellet discharge port 13 and several reject pellet discharge ports 12. The feeding channel 11 is located at the top of the drying furnace 1, the pellet discharge port 13 and the reject pellet discharge ports 12 are located at the bottom of the drying furnace 1, and the pellet discharge port 13 is located on one side of the several reject pellet discharge ports 12.

[0028] The workflow of this invention: First, pellets are fed into the uppermost support plate 212 inside the drying oven 1 through the feeding channel 11. The pellets then enter the placement trough 215 and move along with the drive chain. The placement trough 215 prevents the pellets from moving around on the support plate 212 and falling directly through the gaps in the drive chain. Pellets with excessively small particle sizes will fall sequentially from the through holes 2151 on each support plate 212 until they flow out from the discharge port 12. These pellets are then subjected to secondary bonding to ensure their size meets the requirements for subsequent pellet processing. Pellets with suitable particle sizes will then move along the uppermost support plate 212. At this point, each support plate 212... The second roller 214 on the upper part of the conveyor contacts the first guide rail 216. As the conveyor moves, when the support plate 212 moves to the end near the drive sprocket, the second rollers 214 on several support plates 212 will disengage from the first guide rail 216 in sequence. Then, the support plate 212 deflects at the rotational connection between the first roller 213 and the mounting plate 211, that is, the support plate 212 changes from a horizontal state to a vertical state. The pellets can then fall in batches into the material drop space formed between two adjacent support plates 212 and continue to move along the back plate of the lower support plate 212. At this time, a cycle of drying can be carried out inside and outside each layer of the conveyor belt. The support plate 212, which has been turned over, moves along with the first guide rail 216. The transmission chain moves to the lower layer for conveying. At this time, the second roller 214 on the support plate 212 will contact the inclined section of the second guide rail 4 and maintain a smooth contact state. As the lower transmission chain moves to the right, the support plate 212 will return to the horizontal state. That is, the second roller 214 on each support plate 212 will contact the second guide rail 4, and the pellets falling into the inner cavity of the conveyor belt will continue to move along the back plate of the lower support plate 212. When these pellets move to the end near the driven sprocket, the second roller 214 will disengage from the second guide rail 4 again. Then the support plate 212 will change from a horizontal state to a vertical state again, and then the pellets will... As the pellets fall from the top conveyor belt to the second conveyor belt, the support plate 212 returns to a horizontal state under the action of the first guide rail 216 and the transmission chain (i.e., the upper layer is conveyed to the right), and then a new round of pellet conveying and drying process begins. By repeating the above process, multiple transfers and drying of the pellets in several conveyor belts and the inner cavity of the conveyor belts can be achieved. This can further improve the drying effect of the pellets in the drying oven 1. At the same time, real-time screening of the pellets can be achieved during the drying process, so that it is not necessary to send the dried pellets to the screening device for particle size screening. Finally, the dried pellets flow out from the pellet discharge port 13 for the next processing step. Compared with existing technologies, this device can achieve thorough drying of pellets. The residence time of the pellets in the drying oven 1 is further extended and they are constantly turned over. The support plate 212 can be deflected by 90 degrees and then reset in the lower (or upper) layer to transport the pellets in the inner cavity. Each conveyor belt can perform internal and external circulation drying once, resulting in excellent drying effect. At the same time, it can screen in real time during the drying process to remove pellets with smaller particle size, thereby completing the multiple transfer drying process of qualified pellets.

[0029] In some embodiments, such as Figure 1 As shown, each set of mounting brackets 2 has symmetrically arranged slide rails 31 on the side of the mounting bracket 2 closest to the driven shaft 22. A slider 32 is slidably fitted onto the slide rail 31, and a bearing seat 23 is provided on the slider 32. The fixed plate 201 has symmetrically arranged moving holes that allow for fine-tuning of the horizontal position of the driven shaft 22. These moving holes are not shown in the figure. Both ends of the driven shaft 22 pass through the moving holes and the bearing seat 23, respectively. Mounting rods 33, corresponding one-to-one with the mounting brackets 2, are arranged along the height direction on the outer wall of the drying oven 1. The mounting rods 33 are equipped with… The system includes a pulley block 34 with a steel wire rope 35 wound around it. One end of the steel wire rope 35 is connected to a slider 32, and a counterweight 36 is provided on the pulley block 34. In this embodiment, the pulley block 34, steel wire rope 35, and counterweight 36 allow the two bearing seats 23 to be finely adjusted on the slide rail 31, thereby tightening the transmission chain. This prevents the transmission chain and support plate 212 from malfunctioning and disengaging under high-temperature conditions, ensuring the stability and safety of the conveyor belt during operation in high-temperature environments.

[0030] A further optimization of the above embodiment is that the pulley block 34 is provided with several movable pulleys; this embodiment is not shown in the figure. By setting several movable pulleys side by side, the safety of the counterweight end can be improved. If the wire rope breaks, it can play a buffering role, thus improving safety.

[0031] In other embodiments, such as Figure 1 As shown, a high-temperature dehumidification device 51 is installed on the drying oven 1. The high-temperature dehumidification device 51 adopts existing technology without modification. A dehumidification pipe 52 connected to the high-temperature dehumidification device 51 and a temperature and humidity sensor are installed at the top of the interior of the drying oven 1. The temperature and humidity sensor is not shown in the figure. Several branch pipes 53 are installed on the dehumidification pipe 52. In this embodiment, the humidity of the upper layer inside the drying oven 1 can be detected in real time by the temperature and humidity sensor. When the humidity content is too high, the controller will control the high-temperature dehumidification device 51 to work to quickly absorb the moisture. This further ensures the drying effect of the pellets and avoids the water content in the drying oven 1 from being too high.

[0032] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection claimed by the present invention. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A vertical material drying device, comprising a drying oven (1), wherein a plurality of mounting frames (2) are equidistantly arranged along the height direction inside the drying oven (1), and a fixing plate (201) is symmetrically arranged on each mounting frame (2), and a drive shaft and a driven shaft (22) are rotatably connected between the two fixing plates (201). The drive shaft is connected to a drive assembly and two drive sprockets are arranged on the drive shaft, and two driven sprockets are arranged on the driven shaft (22). The drive sprockets and driven sprockets on the same side are driven by a transmission chain, and a plurality of support plates (212) are rotatably connected on the two transmission chains. The support plate (212) is provided with a first roller (213) and a second roller (214) on both sides respectively; the first roller (213) and the second roller (214) on both sides are symmetrically distributed about the support plate (212); the first roller (213) is rotatably connected to the transmission chain; the second roller (214) is spaced apart from the transmission chain; the second roller (214) cooperates with the first guide rail (216) and the second guide rail in sequence to reduce the wear between the support plate (212) and the first guide rail (216) and the second guide rail; The fixed plate (201) is provided with a first guide rail (216) and a second guide rail (4). The first guide rail and the second guide rail are arranged vertically. The first guide rail (216) on the left and right fixed plates (201) are symmetrical to each other, and the second guide rail (4) is also symmetrical to each other. The first guide rail (216) and the second guide rail are arranged horizontally. The first guide rail (216) is located in the middle gap of the transmission chain, and the second guide rail is located below the transmission chain. A material dropping space is formed between the first guide rail (216) and the second guide rail. Each support plate (212) is sequentially connected to the first guide rail (216). 6) and the second guide rail cooperate so that the support plate (212) is in a vertical state when it is separated from the first guide rail (216) or the second guide rail for pellet discharge, and two adjacent support plates (212) are in contact with the first guide rail (216) or the second guide rail. One section of the first guide rail (216) and the second guide rail is inclined for the smooth movement of the second roller (214). The support plate (212) is provided with a placement groove (215), and a number of through holes (2151) are provided on the bottom surface of the placement groove (215) for real-time screening during the pellet drying process. In each set of mounting brackets (2), the mounting bracket (2) near the driven shaft (22) is symmetrically provided with slide rails (31), and a slider (32) is slidably fitted on the slide rails (31). A bearing seat (23) is provided on the slider (32). The fixing plate (201) is symmetrically provided with moving holes that allow the driven shaft (22) to make slight adjustments to its horizontal position. The two ends of the driven shaft (22) pass through the moving holes and the bearing seat (23) respectively. The slider (32) is connected to a counterweight assembly. The counterweight assembly includes a mounting rod (33), a pulley block (34), a wire rope (35), and a counterweight block (36). The outer wall of the drying oven (1) is provided with mounting rods (33) that correspond one-to-one with the mounting frame (2) along the height direction. The mounting rod (33) is provided with a pulley block (34), and a wire rope (35) is wound on the pulley block (34). One end of the wire rope (35) is connected to a slider (32), and a counterweight block (36) is provided on the pulley block (34). The drying furnace (1) is provided with a feeding channel (11), a pellet discharge port (13) and several reject pellet discharge ports (12). The feeding channel (11) is located at the top of the drying furnace (1), the pellet discharge port (13) and the reject pellet discharge ports (12) are located at the bottom of the drying furnace (1) and the pellet discharge port (13) is located on one side of several reject pellet discharge ports (12). The drying oven (1) is equipped with a dehumidification component, which includes a high-temperature dehumidification device (51) and a dehumidification pipe (52). The drying oven (1) is equipped with a high-temperature dehumidification device (51). The top of the drying oven (1) is equipped with a dehumidification pipe (52) connected to the high-temperature dehumidification device (51) and a temperature and humidity sensor. Several branch pipes (53) are provided on the dehumidification pipe (52).

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