Material drying system

Abstract

The utility model discloses a material drying system. The material drying system comprises a drying kiln body provided with a loading vehicle running track; the hot air generating device is arranged on the air inlet side of the drying kiln body and used for providing hot air for the drying kiln body; the rail type loading vehicle runs on the loading vehicle running rail and is used for feeding materials into the drying kiln body according to a set speed for drying treatment; when the rail type loading vehicle runs along the loading vehicle running rail, the hot air enters the drying kiln body from the air inlet of the drying kiln body and penetrates through a material layer on the rail type loading vehicle, and material drying is achieved. The problems that existing material drying equipment needs lifting operation, and the damage rate is high due to material collision in the drying process are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of material drying equipment, and more specifically, relates to a material drying system. Background Art

[0002] In the complex process of material processing, the drying process is undoubtedly the most crucial and core link. Especially for granular materials, the drying process is a necessary step to ensure the stable quality and excellent performance of these materials. The main purpose of the drying process is to remove the excess moisture in the materials to meet specific moisture content requirements. This is crucial for maintaining the stability of the materials, extending the storage period, and meeting the quality requirements of the raw materials for subsequent processing sections.

[0003] Traditional material drying equipment usually adopts two types of drying equipment: rotary drying kilns and vertical drying kilns. The rotary drying kiln adopts the principle of lifting and drying materials. Through the rotation of the cylinder and the internal lifting plates to lift the materials, the surface of the materials comes into contact with the flue gas for heat exchange to complete the evaporation of moisture. The greater the amplitude of the material lifting, the larger the heat exchange area, and the better the drying effect of the materials. However, when drying materials using this drying method, the mutual impact between the materials leads to a high breakage rate of the materials. For production enterprises with high requirements for the particle size of raw materials, great losses are caused every year due to the breakage of the materials.

[0004] For vertical drying systems that are up to ten or dozens of meters high, the materials need to be lifted from the ground to the top entrance of the dryer to enter the dryer, resulting in high energy consumption for material lifting and transportation, inconvenient maintenance, and safety risks of working at heights; between the materials in the dryer cylinder, and between the materials and the spiral guide plates and the cylinder wall, the materials are squeezed, rotated, and wriggled downward from top to bottom and contact with the high-temperature hot air countercurrently to achieve drying. During this process, the materials will be damaged; during the drying process, feeding from the upper part applies pressure to the materials in the middle and lower parts, resulting in combustion and large-scale bonding and curing of the materials during the high-temperature drying process, affecting the quality of material drying.

[0005] Therefore, it is of great significance to develop an efficient, energy-saving, and environmentally friendly material drying equipment. Summary of the Utility Model

[0006] Aiming at the problem that the existing material drying equipment needs to improve the operation and the high breakage rate caused by the collision of materials during the drying process, the purpose of the present utility model is to provide a material drying system, and the material drying system includes: a drying kiln body provided with a traveling track for a loading vehicle; a track-type loading vehicle traveling on the traveling track for the loading vehicle, and used for feeding materials into the drying kiln body at a set speed for drying treatment; a hot air generating device arranged outside the drying kiln body for providing hot air to the drying kiln body; wherein, when the track-type loading vehicle travels along the traveling track for the loading vehicle, the hot air enters the drying kiln body from the air inlet of the drying kiln body, and the hot air penetrates the material layer on the track-type loading vehicle in the way of entering from the top and exiting from the bottom to realize material drying.

[0007] Further, the hot air penetrates the material layer on the track-type loading vehicle in the way of entering from the top, left and right sides and exiting from the bottom to realize material drying.

[0008] Further, the material drying system further includes a feeding device, and the feeding device conveys materials to the track-type loading vehicle through a chute. A height-adjustable gate is arranged at the discharging end of the chute, and the loading thickness of the materials on the track-type loading vehicle can be controlled by controlling the speed of the track-type loading vehicle and / or the distance between the lower end face of the gate and the track-type loading vehicle.

[0009] Further, the material drying system further includes: a powder receiving chute arranged at the bottom of the track-type loading vehicle and / or the air outlet of the drying kiln body for collecting the material powder generated during the material drying process.

[0010] Further, the powder collected by the powder collecting device can enter the hot air generating device to burn and generate high-temperature flue gas; the air outlet pipeline of the variable-frequency air distribution fan is communicated with the air outlet pipeline of the hot air generating device, and the ambient air input by the variable-frequency air distribution fan is mixed with the high-temperature flue gas output by the hot air generating device to form the hot air; the hot air temperature can be adjusted by adjusting the mixing ratio of the ambient air introduced by the variable-frequency air distribution fan and the high-temperature flue gas output by the hot air generating device; wherein, a cyclone dust removal device and an environmental protection device for purifying the high-temperature flue gas are arranged on the air outlet pipeline of the hot air generating device.

[0011] Further, a plurality of drying areas with different temperatures are arranged in the drying kiln body; wherein, each of the drying areas is provided with a variable-frequency air distribution fan and a standby fan.

[0012] Further, the left side, right side and bottom of the rail-mounted loader are provided with sieve plates, and the drying kiln body is provided with a powder receiving chute; wherein, when the rail-mounted loader travels along the loader travel track, the material powder generated during the drying process can enter the powder receiving chute through the sieve plate.

[0013] Further, the loader travel track is circular or strip-shaped, and the rail vehicle can move forward cyclically.

[0014] Further, a cyclone dust removal device and / or a bag dust removal device are / is provided at the air outlet of the drying kiln body.

[0015] Further, the rail kiln type material drying system further includes a PLC intelligent centralized control system, which is composed of a temperature and humidity detection module, a temperature control module and a speed control module; the temperature and humidity detection module is arranged in the drying kiln body and is used for detecting the temperature and humidity in the drying process in real time; the temperature control module is used for controlling the air volume of the variable frequency air distribution fan to convey ambient air; the speed control module is used for controlling the traveling speed of the rail-mounted loader; the temperature and humidity detection module is connected to the temperature control module and the speed control module.

[0016] The technical effects and advantages of the present utility model:

[0017] 1. The rail-mounted loader runs on the ground, and there is no need to lift the material throughout the process, so there will be no large amount of energy consumption for material lifting, and there is no safety risk of working at heights, and the maintenance is convenient. In addition, after the material is loaded onto the rail-mounted loader, the material and the rail-mounted loader are relatively stationary. During the entire drying process, there will be no mutual collision between the materials, and there will be no collision and friction between the material and the rail-mounted loader, so as to ensure a low breakage rate during the drying process.

[0018] 2. By arranging a powder receiving chute at the bottom of the rail-mounted loader, the material powder at the bottom of the rail-mounted loader generated during the material drying process can be collected and recycled, thereby reducing the material drying cost. In addition, since the material drying system dries the material by passing hot air through the material layer on the rail-mounted loader and performing heat exchange between the hot air and the material layer, the exhaust gas discharged from the air outlet of the drying kiln body will also carry material powder. If the exhaust gas is directly discharged, it will pollute the environment. By setting cyclone dust removal and bag dust removal at the air outlet of the drying kiln body to treat the exhaust gas, and finally the powder enters the powder collection tank, the material powder in the exhaust gas discharged from the air outlet of the drying kiln body can be collected. On the one hand, it can avoid the direct discharge of the exhaust gas carrying material powder from causing environmental pollution and protect the environment and the health of operators; on the other hand, it can also recycle the material powder and reduce the material drying cost. Brief Description of the Drawings

[0019] Figure 1 is a schematic diagram of the connection of various parts of a material drying system provided by this application;

[0020] Figure 2 is a schematic diagram of drying when the material is loaded onto the rail-mounted loader in this application;

[0021] In the figure: 1, drying kiln body; 2, low-temperature drying area; 3, medium-temperature drying area; 4, high-temperature drying area; 5, cyclone dust removal device; 6, bag dust removal device; 7, chimney; 8, powder collection device; 9, hot air generating device; 10, environmental protection device; 11, variable-frequency air distribution fan; 21, air inlet; 22, rail-mounted loader; 23, sieve plate; 24, wheels; 25, loader travel track; 26, powder receiving chute; 27, air outlet; 28, feed chute; 29, gate. Detailed Description of the Preferred Embodiment

[0022] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. The embodiments of the present invention are given for the purpose of illustration and description, and are not exhaustive or limit the present invention to the disclosed form. Many modifications and variations will be obvious to those of ordinary skill in the art. The embodiments are selected and described to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and design various embodiments with various modifications suitable for specific purposes.

[0023] Refer to Figure 1 , which is a schematic diagram of the connection of various parts of a rail kiln type material drying equipment provided by this application, and details the layout and connection mode of each component. Combining Figure 1 and Figure 2 , the rail kiln type material drying equipment includes, for example: a drying kiln body 1, provided with a loader travel track 25; a rail-mounted loader 22, traveling on the loader travel track 25, for feeding materials into the drying kiln body 1 at a set speed for drying treatment; a hot air generating device 9, arranged outside the drying kiln body 1, for providing hot air to the drying kiln body 1; wherein, when the rail-mounted loader 22 travels along the loader travel track 25, the hot air enters the drying kiln body 1 from the air inlet 21 of the drying kiln body 1, and the hot air penetrates the material layer on the rail-mounted loader 22 in an upward-in and downward-out manner to achieve material drying.

[0024] For example, the material is semi-coke. After the semi-coke is loaded onto the rail-mounted loader 22 to form a semi-coke layer with a certain loading thickness, the rail-mounted loader 22 drives into the drying kiln body 1 along the loader travel track 25 at a set speed, thereby feeding the semi-coke into the drying kiln body 1 at the set speed. When the rail-mounted loader 22 travels in the drying kiln body 1 along the loader travel track 25, hot air enters the drying kiln body 1 from the air inlet 21 of the drying kiln body 1, then penetrates the semi-coke layer on the rail-mounted loader 22, dries the semi-coke, and the hot air exchanges heat with the semi-coke layer to become waste gas, which is blown out from the air outlet 27 of the drying kiln body 1.

[0025] It can be understood that the rail-mounted loader 22 runs on the ground, and there is no need to lift the semi-coke during the whole process, so there will be no large amount of energy consumption for lifting the semi-coke, and there is no safety risk of working at height, which is convenient for maintenance. In addition, after the semi-coke is loaded onto the rail-mounted loader 22, the semi-coke and the rail-mounted loader 22 are relatively stationary. During the whole drying process, there will be no collision between the semi-coke and the semi-coke, and there will be no collision and friction between the semi-coke and the rail-mounted loader 22, so as to ensure a low breakage rate during the drying process.

[0026] Preferably, the hot air penetrates the material layer on the rail-mounted loader 22 in the way of entering from the upper, left and right sides and exiting from the lower side to realize material drying. By the way of entering from three sides and exiting from one side, the drying effect of the material can be further improved.

[0027] Furthermore, the rail-kiln type material drying equipment further includes: a powder receiving chute 26, which is arranged at the bottom of the rail-mounted loader 22 and / or the air outlet 27 of the drying kiln body 1, and is used for collecting the material powder generated during the material drying process. For example, the rail-kiln type material drying equipment can be provided with a powder receiving chute 26 only at the bottom of the rail-mounted loader 22, or only at the air outlet 27 of the drying kiln body 1, or corresponding powder receiving chutes 26 are provided at the bottom of the rail-mounted loader 22 and the air outlet 27 of the drying kiln body 1.

[0028] Furthermore, sieve plates 23 are provided on the left side, right side and bottom of the rail-mounted loader 22, and the drying kiln body 1 is provided with a powder receiving chute 26. Among them, when the rail-mounted loader 22 travels along the loader travel track 25, the material powder generated during the drying process can enter the powder receiving chute 26 through the sieve plate 23. For example, the rail-mounted loader 22 is a four-wheeled vehicle made of heat-resistant and corrosion-resistant materials, adapting to the high temperature and corrosion characteristics of the materials. Two loader travel tracks 25 are laid in the drying kiln body 1, and the powder receiving chute 26 is located below the two loader travel tracks 25. For example, according to the site conditions, the guide rails can be designed to be circular or strip-shaped for floor operation. Compared with the strip-shaped ones, the circular ones occupy less land. Among them, the aperture of the sieve plate 23 depends on the user's material discharge requirements, and the aperture of the sieve plate 23 can be adjusted according to the user's material requirements. In a specific embodiment, the aperture of the sieve plate 23 can be 5 mm.

[0029] By providing a sieve plate 23 on the rail-mounted loader 22 and a powder receiving chute 26 in the drying kiln body 1, when the wheels 24 of the rail-mounted loader 22 travel along the loader travel track 25, the material powder generated during the material drying process can automatically be discharged from the sieve plate 23 at the bottom of the rail-mounted loader 22 into the powder receiving chute 26 without manual participation, realizing automatic slag discharge and collection, and there will be no problems of blockage, stagnation and maintenance.

[0030] Furthermore, a cyclone dust removal device 5 and / or a bag dust removal device 6 are provided at the air outlet 27 of the drying kiln body 1. Preferably, an environmental protection device 10 is also provided behind the cyclone dust removal device 5. Among them, the heat source of the hot air generating device is not limited to the recovered material powder, and it can also burn coal, waste heat flue gas, etc. By providing an environmental protection device 10 behind the cyclone dust removal device 5, according to environmental protection requirements, pollutants such as NO x 、SO x 、particulates in the waste gas can be purified to avoid direct discharge of waste gas from the hot air generating device 9 when burning other fuels such as coal, polluting the environment.

[0031] It can be understood that the cyclone dust removal device 5 can use the centrifugal force generated by the rotating dust-containing air flow to separate the material powder from the waste gas. When the waste gas carrying the material powder is discharged from the air outlet 27 of the drying kiln body 1, it enters the cyclone dust removal device 5 through the waste gas discharge pipe. The waste gas carrying the material powder generates centrifugal force during rotation, and the material powder with a density greater than that of the gas is thrown towards the wall of the device. Once the material powder contacts the wall, it loses its inertial force and falls along the wall by the momentum of the inlet velocity and the downward gravity, and enters the ash discharge pipe of the cyclone dust removal device 5. The bag dust removal device 6 can separate the material powder from the waste gas through the bag-type filter element.

[0032] In a specific embodiment, the waste gas carrying material powder discharged from the air outlet 27 of the drying kiln body 1 first undergoes primary dust removal through the cyclone dust removal device 5, then secondary dust removal through the bag dust removal device 6, and then is discharged from the chimney 7.

[0033] Furthermore, the powder collected by the powder collection device 8 enters the hot air generating device 9 for combustion to generate high-temperature flue gas; the air outlet pipeline of the variable frequency air distribution fan 11 is communicated with the air outlet pipeline of the hot air generating device, and the ambient air input by the variable frequency air distribution fan 11 is mixed with the high-temperature flue gas output by the hot air generating device 9 to form the hot air; the temperature of the output hot air can be adjusted by adjusting the mixing ratio of the ambient air input by the variable frequency air distribution fan 11 and the high-temperature flue gas output by the hot air generating device 9. For example, for this variable frequency air distribution fan 11, the rail-mounted loader 22 is equipped with a loader drive motor, which can accurately control the frequency of the variable frequency air distribution fan 11 and the operating frequency of the loader drive motor according to the thickness and humidity of the material layer, so as to accurately control the temperature and humidity in the drying kiln body 1 and the traveling speed of the rail-mounted loader 22, ensuring the drying quality of the material; among them, the air outlet pipeline of the hot air generating device 9 is provided with a cyclone dust removal device 5 and an environmental protection device 10 for purifying the high-temperature flue gas.

[0034] By using the material powder collected by the powder collection device 8 as the fuel of the hot air generating device 9, the collected material powder can be reused, reducing the material drying cost. Since there are particulate matters and sulfur- and nitrate-containing compounds in the high-temperature flue gas generated by the combustion of the material powder, it needs to be treated by the cyclone dust removal device 5 and the environmental protection device 10 first, and then supplied to the drying kiln body 1 as a heat source. Through the variable frequency air distribution fan 11, ambient air with different air volumes can be provided for mixing with the high-temperature flue gas, so as to provide hot air with different temperatures for the drying kiln body 1.

[0035] Furthermore, multiple drying areas with different temperatures are arranged in the drying kiln body 1; among them, each drying area is equipped with a variable frequency air distribution fan 11 and a standby fan. The significant advantage of this rail kiln type drying system is that it can achieve accurate temperature control in different zones, ensuring excellent drying quality and low energy consumption.

[0036] Furthermore, three temperature zones, namely a low-temperature drying zone 2, a medium-temperature drying zone 3, and a high-temperature drying zone 4, are arranged in the drying kiln body 1; during the drying process, the rail-mounted loader 22 sequentially passes through the low-temperature drying zone 2, the medium-temperature drying zone 3, and the high-temperature drying zone 4, so that the material can be heated quickly and evenly, realizing efficient drying.

[0037] In a specific embodiment, variable-frequency air distribution fans 11 and standby variable-frequency air distribution fans 11 are provided in each of the three temperature zones, namely, the low-temperature drying zone 2, the medium-temperature drying zone 3, and the high-temperature drying zone 4, to achieve the one-open-one-standby setting of the variable-frequency air distribution fans 11. For example, the drying temperature in the drying kiln body 1 is 120°C - 400°C; the inlet air temperature of the low-temperature drying zone 2 is 150°C, the inlet air temperature of the medium-temperature drying zone 3 is 200°C, and the inlet air temperature of the high-temperature drying zone 4 is 250°C.

[0038] Furthermore, the track kiln type material drying equipment further includes a feeding device. The feeding device conveys materials to the track type loading vehicle 22 through a feeding chute 28. A height-adjustable gate 29 is provided on one side of the discharging end of the chute. The loading thickness of the materials on the track type loading vehicle 22 can be controlled by controlling the speed of the track type loading vehicle 22 and / or the distance between the lower end face of the gate 29 and the track type loading vehicle 22. For example, the loading thickness of the materials on the track type loading vehicle 22 is 200 mm - 500 mm; the traveling speed of the track type loading vehicle 22 is 1 m / min - 3 m / min.

[0039] For example, when the feeding device conveys materials to the track type loading vehicle 22 through the feeding chute 28, a material layer is formed on the track type loading vehicle 22. Using the feeding chute 28 for material conveyance can reduce the powder rate during material feeding. The traveling speed of the track type loading vehicle 22 and the height of the gate 29 jointly control the loading thickness of the material layer.

[0040] For example, when the traveling speed of the track type loading vehicle 22 is relatively fast, the loading thickness of the material layer is relatively thin; when the traveling speed of the track type loading vehicle 22 is relatively slow, the loading thickness of the material layer is relatively thick. The smaller the distance between the lower end face of the gate 29 and the track type loading vehicle 22, the smaller the loading thickness of the materials on the track type loading vehicle 22; the larger the distance between the lower end face of the gate 29 and the track type loading vehicle 22, the larger the loading thickness of the materials on the track type loading vehicle 22.

[0041] Furthermore, the track kiln type material drying system further includes a PLC intelligent centralized control system. This centralized control system consists of a temperature and humidity detection module, a temperature control module, and a speed control module; the temperature and humidity detection module is arranged in the drying kiln body 1 and is used to detect the temperature and humidity in the drying process in real time; the temperature control module is used to control the air volume of the variable-frequency air distribution fan 11 for conveying ambient air; the speed control module is used to control the traveling speed of the track type loading vehicle 22; the temperature and humidity detection module is connected to the temperature control module and the speed control module to control the traveling speed of the track type loading vehicle 22 and the temperature of the hot air, ensuring the material drying quality.

[0042] For example, it is possible to achieve intelligent and precise variable-frequency control over the loading thickness of the semi-coke layer, the traveling speed of the rail-mounted loading vehicle 22, the air volume, air speed, and hot air temperature of the variable-frequency air distribution fan 11 as needed. This rail-kiln type material drying equipment only requires a single operator during operation, enabling remote wireless monitoring, metering, alarming, and operation. When normal shutdown and maintenance are required, cleaning the axle of the rail vehicle and filling it with lubricating grease can ensure the long-term stable operation of the system, with low operation and maintenance costs.

[0043] Furthermore, the present application provides a method for drying materials. The method for drying materials uses any one of the rail-kiln type material drying equipment described above. The method for drying materials includes the following steps: The rail-mounted loading vehicle 22 loads materials with a target loading thickness and drives into the drying kiln body 1; the hot air generating device 9 provides hot air that penetrates the material layer with the target loading thickness to perform a drying process on the material layer.

[0044] Furthermore, when the rail-mounted loading vehicle 22 travels inside the drying kiln body 1, the material powder passes through the sieve plate 23 of the rail-mounted loading vehicle 22 and enters the powder collection device 8 through the powder receiving chute 26; the waste gas generated during the drying process is discharged from the chimney 7 after being dust-removed by the cyclone dust removal device 5 and the bag dust removal device 6, and the material powder in the cyclone dust removal device 5 and the bag dust removal device 6 enters the powder collection device 8; among them, the material powder collected in the powder collection device 8 during the material drying process can enter the hot air generating device 9 for combustion to obtain hot air for drying materials.

[0045] In a specific embodiment, the material powder can be collected and transported out, or it can be used to provide heat sources.

[0046] In the description of the present utility model, it should be understood that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation to the present utility model.

[0047] Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art and related fields without creative efforts shall fall within the protection scope of the present utility model. The structures, devices, and operation methods not specifically described and explained in the present utility model, unless otherwise specified and limited, are implemented according to the conventional means in the art.

Claims

1. A material drying system, characterized in that, The described material drying system includes: A drying kiln body (1) provided with a traveling track (25) for the loading vehicle. A rail-mounted loading vehicle (22) traveling on the traveling track (25) of the loading vehicle, which is used to feed materials into the drying kiln body (1) at a set speed for drying treatment. A hot air generating device (9) and a variable frequency air distribution fan (11) for providing hot air at the required temperature to the drying kiln body (1). Among them, when the rail-mounted loading vehicle (22) travels along the traveling track (25) of the loading vehicle, the hot air enters the drying kiln body (1) from the air inlet (21) of the drying kiln body (1), and the hot air penetrates the material layer on the rail-mounted loading vehicle (22) in the way of entering from above and exiting from below to realize material drying.

2. The material drying system according to claim 1, wherein The hot air penetrates the material layer on the rail-mounted loading vehicle (22) in the way of entering from above, left and right and exiting from below to realize material drying.

3. The material drying system according to claim 1, characterized in that, The material drying system further includes a feeding device. The feeding device conveys materials to the rail-mounted loading vehicle (22) through a feeding chute (28). The discharge end of the feeding chute (28) is provided with a gate plate (29) with adjustable height. The loading thickness of the materials on the rail-mounted loading vehicle (22) can be controlled by controlling the speed of the rail-mounted loading vehicle (22) and / or the distance between the lower end surface of the gate plate (29) and the rail-mounted loading vehicle (22).

4. The material drying system according to claim 1, characterized in that, The material drying system further includes: a powder receiving chute (26) arranged at the bottom of the rail-mounted loading vehicle (22) and / or the air outlet (27) of the drying kiln body (1) for collecting the material powder generated during the material drying process.

5. The material drying system according to claim 4, characterized in that The powder collected in the powder collection tank (8) enters the hot air generating device (9) to burn and generate high-temperature flue gas; the ambient air input by the variable frequency air distribution fan (11) is mixed with the high-temperature flue gas output by the hot air generating device (9) to form the hot air; the hot air temperature can be adjusted by adjusting the mixing ratio of the ambient air volume introduced by the variable frequency air distribution fan (11) and the high-temperature flue gas output by the hot air generating device; among them, the air outlet pipeline of the hot air generating device (9) is provided with a cyclone dust removal device (5) and an environmental protection device (10) for purifying the high-temperature flue gas.

6. The material drying system according to claim 5, characterized in that, A plurality of drying areas with different temperatures are arranged in the drying kiln body (1); among them, each drying area is provided with a variable frequency air distribution fan (11) and a standby fan.

7. The material drying system according to claim 4, wherein, A sieve plate (23) is arranged at the bottom of the rail-mounted loading vehicle (22), and the drying kiln body (1) is provided with a powder receiving chute (26); among them, when the rail-mounted loading vehicle (22) travels along the traveling track (25) of the loading vehicle, the sieve plate (23) is located above the powder receiving chute (26), and the material powder generated during the drying process can enter the powder receiving chute (26) through the sieve plate (23).

8. The material drying system according to claim 7, characterized in that The traveling track (25) of the loading vehicle is circular or strip-shaped.

9. The material drying system according to claim 4, wherein The air outlet (27) of the drying kiln body (1) is provided with a cyclone dust removal device (5) and / or a bag dust removal device (6).

10. The material drying system according to claim 1, wherein The said track kiln type material drying system further includes a PLC intelligent centralized control system, and this centralized control system is composed of a temperature and humidity detection module, a temperature control module, and a speed control module; the temperature and humidity detection module is arranged in the drying kiln body (1) and is used for detecting the temperature and humidity in the drying process in real time; the temperature control module is used for controlling the air volume of the ambient air conveyed by the variable frequency air distribution fan (11); the speed control module is used for controlling the traveling speed of the track type loading vehicle (22); the temperature and humidity detection module is electrically connected to the temperature control module and the speed control module.

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