Chain plate type rapid drying kiln and using method thereof

Abstract

The invention discloses a chain plate type rapid drying kiln and a using method thereof, and belongs to the field of drying kilns, the chain plate type rapid drying kiln comprises a moisture removal pipeline, a drying kiln, a first moisture removal fan, a robot, a chain plate conveying belt, a first heat supply fan, a heat supply pipeline and a humidifier, the drying kiln comprises a moisturizing dehydration section, a rapid dehydration section and an internal dehydration section, a kiln body is divided into three sections, each section is composed of a plurality of independent treatment sections, each treatment section is provided with an independent heat supply, humidity circulation and moisture removal structure, and different drying path designs of the three sections are matched, so that when the drying kiln is used, each section can be subjected to independent multivariable dehydration adjustment; the structure design of top heat supply, bottom circulation and moisture removal of the moisturizing dehydration section and the internal dehydration section and the structure design of bottom heat supply, top circulation and moisture removal of the rapid dehydration section are combined, better and more reasonable curve drying can be conveniently conducted on the green body, the drying efficiency is guaranteed, and meanwhile the situation that the green body is affected with damp and damaged for the second time can be reduced.

Description

Technical Field

[0001] This invention belongs to the field of drying kilns, and specifically relates to a chain plate type rapid drying kiln and its usage method. Background Technology

[0002] A drying kiln is a large-scale drying equipment used in industrial production, commonly used for drying various green bodies. High-sensitivity materials refer to materials that are generally found underground or in specific areas and have not undergone natural or physical failure. These include clay minerals or shale containing kaolinite, montmorillonite, and jellyfish, all exceeding 10%. When green bodies are made from high-sensitivity materials, the material itself retains a certain temperature and humidity after molding. Combined with the material's high sensitivity, and the fact that traditional drying kilns have simple structures, single drying paths, poor controllability, and low uniformity, they cannot meet the drying requirements of different stages of the green body. This easily leads to cracks and morphological changes in the green body during drying, resulting in energy waste. Furthermore, insufficient drying in traditional kilns can cause black spots and adhesion during subsequent sintering due to stacking. Additionally, during drying in traditional kilns, hot air and moisture can easily adhere to the kiln during pipeline transportation, leading to insufficient humidity inside the kiln and causing the green body to crack due to excessive humidity differences. Summary of the Invention

[0003] (a) Technical problems to be solved To overcome the shortcomings of existing technologies, a chain plate type rapid drying kiln and its application method are proposed to address the problem that when the billet is made of a material with a high sensitivity coefficient, the billet material will have a certain temperature and humidity inside after forming. In addition, the material has a high sensitivity coefficient, and the traditional drying kiln has a simple structure, a single drying path, poor drying controllability, and low uniformity during the drying process. This makes it difficult to meet the drying requirements of different drying stages of the billet, which can easily lead to cracks and morphological changes in the billet during the drying process, as well as energy waste. Furthermore, the traditional drying kiln may not dry the billet to the required degree, which can easily cause black spots and adhesion during the subsequent sintering process due to stacking. Secondly, this addresses the issue that in traditional drying kilns, moisture from hot air tends to adhere during pipeline transportation, leading to insufficient humidity inside the kiln and consequently causing the green body to crack due to excessive humidity differences.

[0004] (II) Technical Solution This invention is achieved through the following technical solution: This invention proposes a chain plate type rapid drying kiln, the structure of which includes a dehumidification pipe, a drying kiln, a first dehumidification fan, a robot, a chain plate conveyor belt, a first hot air blower, and a hot air supply pipe. The drying kiln is connected to the first dehumidification fan through the dehumidification pipe, and the drying kiln is connected to the first hot air blower through the hot air supply pipe. The chain plate conveyor belt is arranged through the drying kiln, and both ends of the chain plate conveyor belt are located outside the drying kiln and connected to the robot. The robot is used to place the blanks on the chain plate conveyor belt. This also includes humidifiers; The drying kiln includes a moisturizing dehydration section, a rapid dehydration section, and an internal dehydration section. The moisturizing dehydration section is located on the inlet side of the billet, the internal dehydration section is located on the outlet side of the billet, and the rapid dehydration section is located between the moisturizing dehydration section and the internal dehydration section. The humidifier is connected to the moisturizing dehydration section adjacent to the inlet side of the billet. Each of the moisturizing dehydration section, the rapid dehydration section, and the internal dehydration section consists of one or more processing sections, and the fixed connections between the processing sections are sealed. The processing sections of the moisturizing and dehydrating section and the internal dehydrating section adopt a top heating, bottom circulation and bottom dehumidification method to dry the billet; The rapid dehydration section uses bottom heating, top circulation, and top dehumidification to dry the billet. Each of the three processing sections—the moisturizing dehydration section, the rapid dehydration section, and the internal dehydration section—has an independent control device. The control device is used to adjust the air volume and temperature and humidity of each section for heat supply, circulation, and dehumidification. Different curved drying environments are formed in the moisturizing dehydration section, the rapid dehydration section, and the internal dehydration section.

[0005] Furthermore, the control device of the processing section includes a second hot air blower, a second dehumidifying blower, a support plate, a hot air duct, a dehumidifying air duct, a fixed platform, a heat insulation plate, a hot air box, a circulating air box, a dehumidifying air box, a heat insulation layer, a partition, a valve, a first heat supply pipe, a second heat supply pipe, a first dehumidifying pipe, a second dehumidifying pipe, a circulating air duct, and a drying chamber. The support plate is provided with a heat insulation layer inside. There are two support plates. The support plates are assembled in parallel. Two or more heat insulation plates are vertically fixed between the support plates. Each pair of heat insulation plates forms a drying chamber between the support plates. The chain conveyor belt is arranged below the drying chamber. The drying chamber is also equipped with a heating air box, a circulating air box, and a dehumidifying air box. The circulating air box and the dehumidifying air box are at the same height. The heating air box is located on the inlet side of the circulating air box adjacent to the processing section, and the dehumidifying air box is located on the outlet side of the circulating air box adjacent to the processing section. The heating air box, circulating air box, and dehumidifying air box are all connected to the drying chamber on the side adjacent to the billet. A fixed platform is fixed to the top of the support plate. The fixed platform is used to assemble the second heating air fan and the second dehumidifying air fan. The insulation layer is divided into a heating air duct, a dehumidifying air duct, and a circulating air duct by partitions. The outlet of the second heating air fan is connected to the heating air box through a first heating pipe and a heating air duct. The side of the circulating air box away from the first heating pipe is connected to one end of the second heating pipe through a circulating air duct. The other end of the second heating pipe is connected to the inlet of the second heating air fan. The second heating pipe is also connected to a heating... The ductwork positions the inlet of the hot air supply and the outlet of the dehumidifying air supply on opposite sides of the drying chamber. Air flows from one side of the drying chamber to the other, ensuring smooth airflow during heat delivery via circulating humidity. The dehumidifying air box, adjacent to the first heat delivery pipe, is connected to the inlet of the second dehumidifying fan via a dehumidifying duct and a first dehumidifying pipe. The outlet of the second dehumidifying fan is connected to the dehumidifying pipe via a second dehumidifying pipe. This arrangement positions the inlet of the hot air supply and the outlet of the dehumidifying air supply on the same side of the drying chamber, allowing air to flow from one side of the drying chamber back to the same side and exit. This deflection of the circulating heat delivery duct allows for deflected drying within a single processing section, better ensuring uniform drying. Valves are installed at the connection points of the dehumidifying air box and the dehumidifying duct, as well as at the connections of the circulating air box and the circulating duct, the hot air box and the hot air delivery duct, and the hot air delivery pipe and the second hot air delivery pipe.

[0006] Furthermore, the heating air boxes of the moisturizing and dehydrating section and the internal dehydrating section are located above the chain conveyor belt, and the circulating air boxes and dehumidifying air boxes of the moisturizing and dehydrating section and the internal dehydrating section are located below the chain conveyor belt or between the upper and lower belts. The heating air box of the rapid dehydration section is located below the chain conveyor belt or between the upper and lower belts, while the circulating air box and dehumidifying air box of the rapid dehydration section are located above the chain conveyor belt.

[0007] Furthermore, the hot air box includes a main box body, a ventilation box groove, and ventilation holes. The ventilation box groove is provided inside the main box body, and one end of the ventilation box groove passes through the main box body. A ventilation hole is also provided through one end face of the main box body. The ventilation hole communicates with the ventilation box groove and is assembled towards the blank.

[0008] Furthermore, the structures of the circulating air box and the dehumidifying air box are the same as those of the heating air box.

[0009] Furthermore, the valve is a PLC-controlled valve, and the processing section also includes a temperature and humidity sensor, which is respectively installed in the heating air duct, dehumidification air duct, circulation air duct and heating pipeline. The temperature and humidity sensor controls the valve opening by monitoring the temperature and humidity.

[0010] Furthermore, the insulation layer is a vacuum trough or made of thermal insulation material, and the partition is made of thermal insulation material.

[0011] Furthermore, the supporting plate is made of reinforced concrete, the fixing platform is made of I-beams or reinforced concrete, and the heat insulation board is a prestressed plate.

[0012] Furthermore, the processing section is equipped with one or more hot air boxes, circulating air boxes, and dehumidifying air boxes.

[0013] Furthermore, the first venting pipe includes a protective layer, insulation cotton, and a pipe body. The insulation cotton is evenly wrapped around the outside of the pipe body, and the protective layer is then wrapped around the outside of the insulation cotton. Furthermore, the protective layer is made of aluminum plate; Furthermore, the structures of the dehumidification pipe, the heat supply pipe, the second heat supply pipe, the first dehumidification pipe, and the second dehumidification pipe are all consistent with the structure of the first heat supply pipe.

[0014] Furthermore, a method for using a chain plate type rapid drying kiln is also involved; The following steps are involved: 1. Set up a moisturizing dehydration section, a rapid dehydration section, and an internal dehydration section, and set the corresponding number of processing sections in the moisturizing dehydration section, rapid dehydration section, and internal dehydration section according to production needs; 2. The blanks are placed at an angle on the chain conveyor belt, so that during the drying process, the gas is fed in from the top or bottom and discharged from the other side, which allows the gas to pass through the internal holes and the outside of the brick blank better, thereby increasing the contact surface and further improving the drying efficiency. 3. Keep the processing section of the moisturizing and dehydrating section in a positive pressure drying state, and connect the humidifier to the second hot air blower at the inlet of the moisturizing and dehydrating section. As the circulating humidity of the processing section at the inlet of the moisturizing and dehydrating section gradually increases, gradually reduce the humidity supply of the humidifier to the second hot air blower until it is zero. The initial heating humidity of the moisture-retaining and dehydration section should be ≥40%, the initial heating temperature should be 10-15℃ higher than the body temperature, the initial heating air volume should be 2000±100m³ / h, the initial dehydration rate of the brick body should be ≤3.1%, the initial dehumidification air volume should be ≤12000m³ / h, and the initial dehumidification moisture content should be ≤81%. The heating temperature, heating air volume, and dehumidification humidity of the moisture-retaining dehydration section are gradually increased from the inlet to the outlet. The dehumidification air volume first decreases and then increases. The heating humidity gradually decreases with a decrease of ≤1%. The heating temperature is increased to 60±3℃, the dehumidification air volume is increased to 14000±100m³ / h, and the heating air volume is increased to 11000±100m³ / h, so that the dehydration rate of the green body is ≤5%. Fourth, keep the rapid dehydration section in a negative pressure drying state; The heating temperature of the rapid dehydration section gradually increases from the inlet to the outlet. The heating air volume, dehumidification air volume, and dehumidification humidity all increase first and then decrease. The heating humidity gradually decreases and the decrease is ≤1%, so that the dehydration rate of the green body gradually increases. 5. Ensure that the internal dehydration section is under positive pressure drying. The internal dehydration section is designed with a gradually increasing heating temperature from the inlet to the outlet, while the heating air volume, dehumidification air volume, and dehumidification humidity gradually decrease. The heating humidity first decreases by ≤1% and then remains at 30%, thus gradually reducing the dehydration rate of the green body.

[0015] (III) Beneficial Effects One of the above technical solutions has the following advantages or beneficial effects: To address the challenges posed by materials with high sensitivity coefficients when green bodies are made from such materials, which exhibit internal temperature and humidity after molding, coupled with the high sensitivity of the materials and the limitations of traditional drying kilns (simple structure, single drying path, poor controllability, low uniformity) in meeting the drying requirements of different stages, leading to cracks and morphological changes during drying, energy waste, insufficient drying in traditional kilns, black spots and adhesion during subsequent sintering due to stacking, and the tendency for hot air and moisture to adhere during pipeline transportation in traditional kilns, resulting in insufficient humidity inside the kiln and ultimately cracking of the green bodies due to excessive humidity differences; 1. By setting the kiln body into three sections, each section consists of multiple independent processing sections. Each processing section is equipped with an independent heat supply, humidity circulation and dehumidification structure. Combined with the drying path design for different needs of the three sections, each section can be independently adjusted for multi-variable drying and dehydration, which can achieve a better drying and dehydration curve and reduce energy waste. 2. The design, incorporating top air intake, bottom circulation, and bottom dehumidification in the moisture-retaining dehydration section, allows the drying gas to circulate under a gentle breeze and positive pressure. This ensures that the green body is initially in a positive pressure, gentle breeze, low temperature, and moisturizing drying state upon entering the kiln, preventing cracking and deformation caused by high temperature, high air volume, and low humidity. Once the green body has reached a certain drying stage and enters the rapid dehydration section, it gains some strength. At this point, the kiln switches to negative pressure drying, employing high air volume, slightly higher temperature, and moderate humidity for rapid dehydration, increasing dehydration efficiency. Because the dehumidification and circulation are located at the top, the hot gas can rise smoothly, facilitating the entry of large amounts of evaporated humid gas into the dehumidification and circulation pipes, preventing excessive moisture buildup at the top of the kiln. Condensation and water droplets falling back onto the billet, causing damage and secondary damping, are addressed by rapidly dehydrating the billet. After dehydration, the billet enters the internal dehydration section. At this point, the surface of the billet is basically dry, but there is still moisture inside. However, the moisture content of the billet is relatively low, and high air volume is not required. Therefore, a top-inlet, bottom-circulation, and bottom-exhaust design is adopted. The kiln is transformed into a positive pressure drying, micro-wind, high-temperature, and low-humidity drying state, which raises the internal temperature of the billet and rapidly vaporizes the internal moisture. This makes the kiln structure more reasonable, facilitates the formation of a better drying and dehydration curve, ensures efficiency, and improves the drying quality of the billet. This allows the billet to have a better drying effect, so that when the billets are stacked during subsequent sintering, there will be no black spots or sticking. 3. At the same time, by setting up a circulating air box between the heating air box and the dehumidification air box, the moisture discharged after the green body is dried is preferentially extracted by the circulating pipeline for humidity recycling. The moisture pipeline is short, avoiding the consumption of moisture in the supply pipe of the heating pipe, ensuring that the humidity in the kiln can be controlled and regulated more in a timely manner, reducing the problem of cracking of the green body due to humidity difference, and also reducing the supply of external moisture, thus saving energy better. 4. When a circulating air box is set between the hot air box and the dehumidifying air box in a single processing section, the air outlets of the circulating air box and the dehumidifying air box are on opposite sides. This gives the single processing section two different air duct paths when it is used for drying. Combined with the setting of multiple processing sections, this makes the uniformity better and avoids the uneven drying caused by a single path. 5. The external pipeline of the kiln is designed with a multi-layer protective structure, which makes the pipeline better protected, reduces pipeline leakage, and can better retain heat in the pipeline, reduce heat loss, facilitate heating and heat recovery, and achieve higher energy efficiency. Attached Figure Description

[0016] Other features, objects, and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 This is a cross-sectional structural diagram of the front view of the present invention; Figure 2 For the present invention Figure 1 Schematic diagram of the enlarged structure of A; Figure 3 For the present invention Figure 1 A magnified structural diagram of B in the diagram; Figure 4 For the present invention Figure 1 A schematic diagram of the enlarged cross-sectional structure of C; Figure 5 This is a schematic diagram of the structure of the drying kiln of the present invention, viewed from top view. Figure 6 This is a schematic diagram of the structure of the present invention, except when the blank is placed on the chain conveyor belt; Figure 7 This is a cross-sectional schematic diagram of the side view of the moisturizing and dehydrating section and the internal dehydrating section of the present invention at the hot air duct. Figure 8 This is a cross-sectional structural schematic diagram of the side view of the circulating air duct of the moisturizing and dehydrating section and the internal dehydrating section of the present invention. Figure 9 This is a cross-sectional structural schematic diagram of the side view of the moisture-retaining and dehydrating section and the dehumidifying air duct of the internal dehydrating section of the present invention. Figure 10 This is a cross-sectional structural schematic diagram of the side view of the hot air duct of the rapid dehydration section of the present invention; Figure 11 This is a schematic diagram of the cross-sectional structure arrangement of the circulating air duct in the rapid dehydration section of the present invention. Figure 12 This is a cross-sectional structural schematic diagram of the side view of the dehumidification duct of the rapid dehydration section of the present invention; Figure 13 This is a cross-sectional structural diagram of the hot air box of the present invention; Figure 14 This is a schematic cross-sectional view of the first heat delivery pipe of the present invention; Figure 15 This is a cross-sectional structural diagram of the front view of Embodiment 4 of the present invention; Figure 16 This is a schematic diagram of the structure of Embodiment 4 of the present invention from top view; In the diagram: 1. Exhaust pipe - 2. Drying kiln - 3. First exhaust fan - 4. Robot - 5. Chain conveyor belt - 6. First hot air blower - 7. Hot air pipe - 8. Humidifier - 9. Placement of blanks - 1. Moisturizing and dehydrating section - a. Rapid dehydration section - b. Internal dehydration section - c. Processing section - d. Second hot air blower - e. Second exhaust fan - f. Support plate - g. Hot air duct - h. Dehumidifying air duct - i. Fixed platform - j. Insulation board - k. Hot air box - l. Circulating air box - m. Exhaust air box - n. Insulation layer - o. Partition - p. Valve - q. First hot air pipe - r. Second hot air pipe - s. First exhaust pipe - t. Second exhaust pipe - u. Circulating air duct - v. Drying room - w. Main box - l1. Ventilation box slot - l2. Ventilation hole - l3. Protective layer - r1. Insulation cotton - r2. Pipe body - r3. Detailed Implementation

[0017] The present invention will be further described in detail below with reference to embodiments, but the implementation of the present invention is not limited thereto.

[0018] Example 1: This invention provides a chain plate type rapid drying kiln: its structure includes a dehumidification pipe 1, a drying kiln 2, a first dehumidification fan 3, a robot 4, a chain plate conveyor belt 5, a first hot air blower 6, and a hot air supply pipe 7. The drying kiln 2 is connected to the first dehumidification fan 3 through the dehumidification pipe 1, and the drying kiln 2 is connected to the first hot air blower 6 through the hot air supply pipe 7. The chain plate conveyor belt 5 is arranged through the drying kiln 2, and both ends of the chain plate conveyor belt 5 are located outside the drying kiln 2 and connected to the robot 4. The robot 4 is used to place the blanks 9 on the chain plate conveyor belt 5. Also includes a humidifier 8; The drying kiln 2 includes a moist dehydration section a, a rapid dehydration section b, and an internal dehydration section c. The moist dehydration section a is located on the inlet side of the billet 9, the internal dehydration section c is located on the outlet side of the billet 9, the rapid dehydration section b is located between the moist dehydration section a and the internal dehydration section c, and the humidifier 8 is connected to the moist dehydration section a adjacent to the inlet side of the billet 9. The moisturizing and dehydrating section a, the rapid dehydrating section b, and the internal dehydrating section c are each composed of one or more processing sections d, and the fixed connections between the processing sections d are sealed. The processing section d of the moisturizing and dehydrating section a and the internal dehydrating section c uses top heating, bottom circulation and bottom dehumidification to dry the blank 9; The processing section d of the rapid dehydration section b uses bottom heating, top circulation and top dehumidification to dry the billet 9; The moisturizing and dehydrating section a adopts positive pressure drying and micro-wind drying method, and the heat supply temperature is gradually increased from close to the temperature of the green body 9 to 60±3℃, and the heat supply humidity is gradually decreased from above ≥40% with a decrease of ≤1% to remove the surface moisture of the green body 9. The rapid dehydration section b adopts a negative pressure drying and high air volume drying method, and the temperature gradually rises to close to or reach the traditional drying temperature of the kiln. Under the condition that the humidity continues to decrease and the decrease is ≤1%, most of the moisture in the green body 9 is removed. The internal dehydration section c adopts positive pressure drying and micro-wind drying method, and the temperature is raised to reach or exceed the traditional drying temperature of the kiln. The humidity continues to decrease and the decrease is ≤1% and finally maintained at 30% to remove the internal moisture of the green body 9.

[0019] Furthermore, the control device of the processing section d includes a second hot air blower e, a second dehumidifying blower f, a support plate g, a hot air duct h, a dehumidifying air duct i, a fixed platform j, a heat insulation plate k, a hot air box l, a circulating air box m, a dehumidifying air box n, a heat insulation layer o, a partition p, a valve q, a first heat supply pipe r, a second heat supply pipe s, a first dehumidifying pipe t, a second dehumidifying pipe u, a circulating air duct v, and a drying chamber w. The support plate g is provided with a heat insulation layer o inside. There are two support plates g. The support plates g are assembled in parallel. Two or more heat insulation plates k are vertically fixed between the support plates g. Each pair of heat insulation plates k forms a drying chamber w between the support plates g. The chain conveyor belt 5 is arranged below the drying chamber w. The drying chamber w is also equipped with a heating air box l, a circulating air box m, and a dehumidifying air box n. The circulating air box m and the dehumidifying air box n are at the same height. The heating air box l is located on the inlet side of the circulating air box m adjacent to the processing section d, and the dehumidifying air box n is located on the outlet side of the circulating air box m adjacent to the processing section d. The heating air box l, the circulating air box m, and the dehumidifying air box n are all connected to the drying chamber w on the side adjacent to the blank 9. A fixed platform j is fixed to the top of the support plate g. The fixed platform j is used to assemble the second heating air fan e and the second dehumidifying air fan f. The insulation layer o is divided into a heating air duct h, a dehumidifying air duct i, and a circulating air duct v by a partition p. The air outlet of the second heating air fan e is connected to the heating air duct h through a first heating pipe r. A heating air box l is provided. The circulating air box m, located away from the first heating pipe r, is connected to one end of the second heating pipe s via a circulating air duct v. The other end of the second heating pipe s is connected to the air inlet of the second heating fan e. The second heating pipe s is also connected to a heating pipe 7. The dehumidifying air box n, located near the first heating pipe r, is connected to the air inlet of the second dehumidifying fan f via a dehumidifying air duct i and a first dehumidifying pipe t. The air outlet of the second dehumidifying fan f is connected to the dehumidifying pipe 1 via a second dehumidifying pipe u. A valve q is installed at the connection between the dehumidifying air box n and the dehumidifying air duct i. Valves q are also installed at the connection between the circulating air box m and the circulating air duct v, the connection between the heating air box l and the heating air duct h, and the connection between the heating pipe 7 and the second heating pipe s.

[0020] Furthermore, the blank 9 is a brick blank.

[0021] Furthermore, the heating air box l of the moisturizing and dehydrating section a and the internal dehydrating section c is located above the chain conveyor belt 5, and the circulating air box m and the dehumidifying air box n of the moisturizing and dehydrating section a and the internal dehydrating section c are located below the chain conveyor belt 5 or between the upper and lower belts. The heating air box l of the rapid dehydration section b is located below the chain conveyor belt 5 or between the upper and lower belts, while the circulating air box m and the dehumidifying air box n of the rapid dehydration section b are located above the chain conveyor belt 5.

[0022] Furthermore, the hot air box l includes a main box body l1, a ventilation box groove l2, and a ventilation hole l3. The ventilation box groove l2 is provided inside the main box body l1. One end of the ventilation box groove l2 passes through the main box body l1. A ventilation hole l3 is also provided through one end face of the main box body l1. The ventilation hole l3 communicates with the ventilation box groove l2 and is assembled towards the blank 9.

[0023] Furthermore, the structures of the circulating air box m and the dehumidifying air box n are the same as those of the heating air box l.

[0024] Furthermore, the insulation layer o is a vacuum trough or made of thermal insulation material, and the partition p is made of thermal insulation material.

[0025] Furthermore, the supporting plate g is made of reinforced concrete, the fixed platform j is made of I-beams or reinforced concrete, and the heat insulation board k is a prestressed floor slab or made of prestressed steel.

[0026] Furthermore, the processing section d is provided with one or more hot air boxes l, circulating air boxes m, and dehumidifying air boxes n.

[0027] Implementation plan: During use, the billet 9 is fed into the drying kiln 2 by the chain conveyor belt 5. At this time, the humidifier 8 can provide preliminary humidification for the second hot air blower e of the treatment section d at the inlet of the moisturizing and dehydrating section a, so as to ensure that the humidity of the billet 9 is moderate when it enters the kiln for drying, and to prevent the billet 9 from cracking due to the large humidity difference between the hot air and the billet 9. The independent second hot air blower e and the second dehumidifying blower f enable the processing section d to be dried independently with temperature and humidity control, so that the green body 9 in the moist dehydration section a is in a positive pressure, low wind, low temperature and moist drying state. At this time, the dehumidifying air box n and the circulating air box m of the moist dehydration section a are located below the green body 9, and the hot air box l is located above the green body 9. This allows the humid gas to enter the circulating air box m and the dehumidifying air box n without high air volume in the kiln, avoiding cracking and deformation of the green body caused by high temperature, high air volume and low humidity. After a period of time, the humidity drawn into the circulating air box m reaches the humidity requirement at the inlet, and the humidity supply of the humidifier 8 can be gradually reduced to achieve humidity self-circulation and reduce the waste of water resources. After the green body is gently dried in the moisturizing and dehydrating section a, the green body with a certain shape and reduced humidity will enter the rapid dehydration section b. At this time, the processing section d of the rapid dehydration section b is controlled by an independent fan to form a negative pressure, high flow rate, high temperature and moderate humidity for rapid drying. The circulating air box m and the dehumidifying air box n are changed to the top of the green body 9, and the hot air box l is changed to the bottom of the green body 9. The kiln is changed to negative pressure drying, and the green body 9 is rapidly dehydrated by using a high air volume, slightly high temperature and moderate humidity to increase the dehydration efficiency. Since the dehumidification and circulation are at the top, the hot gas can rise accordingly, which makes it easier for a large amount of evaporated humid gas to enter the dehumidification and circulation pipes, preventing the moisture from being too high and condensing at the top of the kiln, as well as water droplets falling back onto the green body and causing damage to the green body and secondary moisture absorption. Finally, after rapid dehydration in the rapid dehydration section b, the billet 9 enters the internal dehydration section c. At this point, the surface of the billet 9 is basically dry, but there is still moisture inside the billet 9. Since the moisture content of the billet 9 is relatively low and high air volume is not required, the processing section d of the internal dehydration section c is changed back to the design where the exhaust air box n and the circulating air box m are located below the billet 9, and the hot air box l is located above the billet 9. The kiln is transformed into a drying state of positive pressure drying, micro-wind, high temperature and low humidity, which raises the internal temperature of the billet 9 and quickly vaporizes the internal moisture. This makes the structure of the drying kiln more reasonable, facilitates the formation of a better drying and dehydration curve, ensures efficiency and improves the drying quality of the billet. Meanwhile, the kiln body uses a first exhaust fan 3 connected to the outlet of all second exhaust fans f, and a first hot air fan 6 connected to the outlet of all second hot air fans e, to ensure sufficient exhaust and heat supply pressure, preventing backflow and insufficient heat supply. By setting a circulating air box m between the hot air box l and the exhaust air box n, the moisture discharged after the green body 9 is dried is preferentially extracted by the circulating pipeline for humidity recycling. The moisture pipeline is short, avoiding the consumption of moisture in the supply pipe of the heat supply pipe, ensuring that the humidity inside the kiln can be controlled and regulated more in a timely manner, reducing the problem of cracking of the green body due to humidity difference, and also reducing the supply of external moisture, thus saving energy.

[0028] Example 2: Compared to Embodiment 1, the valve q in this embodiment is a PLC-controlled valve, and the processing section d also includes a temperature and humidity sensor (not shown in the figure). The temperature and humidity sensor is respectively installed in the heating air duct h, the dehumidifying air duct i, the circulating air duct v and the heating pipe 7. The temperature and humidity sensor controls the opening degree of valve q by monitoring the temperature and humidity.

[0029] Compared to Example 1, this example is more intelligent, enabling more timely adjustment of temperature and humidity inside the kiln.

[0030] Example 3: like Figure 14 As shown, compared to Embodiment 1, the first venting pipe t in this embodiment includes a protective layer r1, insulation cotton r2 and a pipe body r3. The insulation cotton r2 is evenly wrapped around the outside of the pipe body r3, and the protective layer r1 is wrapped around the outside of the insulation cotton r2. Furthermore, the protective layer r1 is made of aluminum plate; Furthermore, the structures of the external kiln pipes, such as the dehumidification pipe 1, the heat supply pipe 7, the second heat supply pipe s, the first dehumidification pipe t, and the second dehumidification pipe u, are all consistent with the structure of the first heat supply pipe r.

[0031] Compared to Example 1, this example has better protection for the external pipeline of the kiln, which can reduce pipeline leakage and better retain heat in the pipeline, reduce heat loss, facilitate heating and heat recovery, and achieve higher energy efficiency.

[0032] Example 4: A method for using a chain plate type rapid drying kiln; The following describes one method of using a material with a high sensitivity coefficient of 1 to make porous brick blanks, and the method of using these brick blanks for drying in the kiln in Example 1, Example 2, or Example 3. This does not mean that all brick products need to use the same parameters, and includes the following steps: 1. Based on the product requirements, set processing sections 1-5 (d) as moisturizing and dehydrating sections (a), processing sections 6-10 (d) as rapid dehydration sections (b), and processing sections 11-15 (d) as internal dehydration sections (c). 2. Place the brick blanks at an angle on the chain conveyor belt 5 so that when the brick blanks are drying, the gas is fed in from the top or bottom and discharged from the other side, so that the gas can pass through the internal holes and the outside of the brick blanks better, thereby increasing the contact surface and further improving the drying efficiency. III. Set the parameters for each processing segment d as shown in the table below:

[0033]

[0034]

[0035] To ensure a reasonable curved drying process for the brick blanks, in the moisturizing and dehydrating section a, the brick blanks are initially controlled to be in a moisturizing and drying state with slight positive pressure, gentle airflow, low temperature, and relatively high humidity. At this time, the circulating air box m and the exhaust air box n are at the bottom of the brick blanks, and the hot air box l is at the top. The hot air box l blows slightly warm, humid air close to the moisture content of the brick blanks from top to bottom. The slight positive pressure and gentle airflow prevent the brick blanks from being deformed due to excessive pressure or high wind speed, and the warm, humid air close to the moisture content ensures that the brick blanks are properly dried. While preventing excessive humidity difference from causing cracking during dehydration, the brick blank is kept in a gentle dehydration state. As the brick blank gradually dehydrates and sets, the heating temperature, heating air volume, and dehumidification rate all gradually increase, and the dehumidification air volume also increases accordingly, while the heating humidity gradually decreases. This gradually increases the dehydration intensity of the brick blank and ensures the drying efficiency of the brick blank. Moreover, the dehumidification air volume at the inlet of the first processing section d that the brick blank enters is higher than that of the wet dehydration section a, which can reduce the overflow of moisture towards the brick blank inlet. After the brick blanks have been dehydrated and shaped to a certain extent, they enter the rapid dehydration section b. The circulating air box m and the dehumidification air box n are located at the top of the brick blanks, while the hot air box l is moved to the bottom of the brick blanks. At this time, the brick blanks have a certain shape and are not easily deformed. The kiln adopts a rapid drying state with high wind speed, high temperature and moderate humidity. The brick blanks will be dehydrated in large quantities. At this time, the top-mounted circulating air box m and dehumidification air box n will more easily discharge a large amount of moisture and reduce the condensation of moisture in the kiln, thereby preventing water droplets from dripping onto the brick blanks and causing damage to the blanks and secondary moisture absorption. After the brick blanks undergo rapid dehydration, they enter the internal dehydration section c. At this point, the external moisture of the brick blanks is basically removed, but the internal moisture is not removed. Rapid dehydration cannot effectively remove the internal moisture. Instead, the circulating air box m and the dehumidification air box n are placed at the bottom of the brick blanks, and the hot air box l is placed at the top of the brick blanks. This keeps the kiln in a drying state of positive pressure, gentle airflow, high temperature and low humidity, which raises the internal temperature of the brick blanks and quickly vaporizes and removes the internal moisture. This allows the brick blanks to maintain dehumidification efficiency while preventing cracking, black spots, and sticking, thus improving the quality of the finished product.

[0036] In the description of this invention, it should be noted that negative pressure drying involves placing the material in a fixed, sealed container and creating a low-pressure environment by reducing pressure or venting, so that moisture and solvents are dried by evaporation or evaporative condensation. During this process, steam needs to be continuously discharged by venting. The negative pressure environment improves the drying efficiency of the material and shortens the drying time.

[0037] Positive pressure drying: Drying gas flowing along the direction of material movement is directly compressed to a pressure above the ambient pressure of the material, forming a positive pressure environment of ≥ atmospheric pressure, thereby achieving material drying. During this process, hot gas flow is directly sprayed onto the surface of the material, drying it through heat conduction, while extracting excess moisture and solvent.

[0038] Micro-positive pressure refers to the positive pressure drying state in which the brick blanks are dried after the drying method changes from negative pressure to positive pressure in the kiln environment where they are used. It is generally the drying state when the pressure is close to atmospheric pressure.

[0039] The terms “up,” “down,” “left,” “right,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the present invention.

[0040] The control method of this invention is to control the system by manually starting and stopping the switch or by using an intelligent system such as a PLC. The wiring diagram of the power components and the supply of power are common knowledge in the field. Furthermore, this invention is mainly used to protect the kiln structure, ventilation principle and temperature and humidity control methods, so the control method and wiring layout will not be explained in detail.

[0041] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0042] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A chain plate type rapid drying kiln, the structure of which comprises a dehumidification pipe (1), a drying kiln (2), a first dehumidification fan (3), a robot (4), a chain plate conveyor belt (5), a first hot air blower (6) and a heat supply pipe (7), wherein the drying kiln (2) is connected to the first dehumidification fan (3) via the dehumidification pipe (1), the drying kiln (2) is connected to the first hot air blower (6) via the heat supply pipe (7), the chain plate conveyor belt (5) is arranged through the drying kiln (2), two ends of the chain plate conveyor belt (5) are located outside the drying kiln (2) and are connected to the robot (4), and the robot (4) is used to place a blank (9) on the chain plate conveyor belt (5); Features: Also included is a humidifier (8); The drying kiln (2) comprises a moisturizing and dehydrating section (a), a rapid dehydrating section (b) and an internal dehydrating section (c), wherein the moisturizing and dehydrating section (a) is located at the inlet side of the green body (9), the internal dehydrating section (c) is located at the outlet side of the green body (9), the rapid dehydrating section (b) is located between the moisturizing and dehydrating section (a) and the internal dehydrating section (c), and the humidifier (8) is connected to the moisturizing and dehydrating section (a) adjacent to the inlet side of the green body (9); The moisturizing and dehydrating section (a), the rapid dehydrating section (b) and the internal dehydrating section (c) are each composed of one or more processing sections (d), and the processing sections (d) are hermetically connected at the fixed connections between each other; The treatment section (d) of the moisturizing and dehydrating section (a) and the internal dehydrating section (c) uses a top heat supply, bottom circulation and bottom moisture removal method to dry the green body (9); The processing section (d) of the rapid dehydration section (b) uses a bottom heat supply, top circulation and top moisture removal method to dry the green body (9); The processing section (d) of the moisturizing and dehydrating section (a), the rapid dehydrating section (b) and the internal dehydrating section (c) are all provided with independent control devices, and the control devices are used to adjust the air volume and temperature and humidity of heat supply, circulation and moisture removal of each section, so that different curved drying environments are formed in the moisturizing and dehydrating section (a), the rapid dehydrating section (b) and the internal dehydrating section (c).

2. The chain plate type rapid drying kiln according to claim 1, characterized in that: The control device of the processing section (d) comprises a second heat supply fan (e), a second dehumidification fan (f), a support plate (g), a heat supply air duct (h), a dehumidification air duct (i), a fixed platform (j), a heat insulation board (k), a heat supply air box (l), a circulation air box (m), a dehumidification air box (n), a heat insulation layer (o), a partition (p), a valve (q), a first heat supply pipe (r), a second heat supply pipe (s), a first dehumidification pipe (t), a second dehumidification pipe (u), a circulation air duct (v) and a drying room (w), wherein a heat insulation layer (o) is provided inside the support plate (g), and two support plates (g) are provided, and the support plates (g) are arranged in parallel, and two or more heat insulation boards (k) are vertically fixed between the support plates (g), and every two heat insulation boards (k) form a drying room (w) between the support plates (g), and the chain plate conveyor belt (5) is arranged under the drying room (w); The drying room (w) is also equipped with a heat supply air box (l), a circulation air box (m) and a dehumidification air box (n), wherein the circulation air box (m) and the dehumidification air box (n) have the same height, the heat supply air box (l) is located at the inlet side of the circulation air box (m) adjacent to the processing section (d), and the dehumidification air box (n) is located at the outlet side of the circulation air box (m) adjacent to the processing section (d), and the heat supply air box (l), the circulation air box (m) and the dehumidification air box (n) adjacent to the blank (9) are all connected to the drying room (w), a fixed platform (j) is fixed on the top of the support plate (g), and the fixed platform (j) is used to install a second heat supply air fan (e) and a second dehumidification air fan (f), and the heat insulation layer (o) is separated into a heat supply air duct (h), a dehumidification air duct (i) and a circulation air duct (v) by a partition (p), and the air outlet of the second heat supply air fan (e) is connected to the first heat supply pipe (r) and the hot air duct (h). The heat supply air box (l) is connected, the circulation air box (m) is connected to one end of the second heat supply pipe (s) through the circulation air duct (v) away from the first heat supply pipe (r), the other end of the second heat supply pipe (s) is connected to the air inlet of the second heat supply air blower (e), the second heat supply pipe (s) is also connected to the heat supply pipeline (7), the dehumidification air box (n) is adjacent to the first heat supply pipe (r) and is connected to the second dehumidification air duct (i) and the first dehumidification pipe (t) The air inlet of the fan (f) is connected, the air outlet of the second dehumidification fan (f) is connected to the dehumidification pipe (1) through the second dehumidification pipe (u), the dehumidification bellows (n) and the dehumidification air duct (i) are connected at a valve (q), the connection between the circulation bellows (m) and the circulation air duct (v), the connection between the heat supply bellows (l) and the heat supply air duct (h), and the connection between the heat supply pipe (7) and the second heat supply pipe (s) are also equipped with a valve (q).

3. The chain plate type rapid drying kiln according to claim 2, characterized in that: The heat supply bellows (l) of the moisturizing and dehydrating section (a) and the internal dehydrating section (c) are located above the chain conveyor belt (5), and the circulation bellows (m) and moisture removal bellows (n) of the moisturizing and dehydrating section (a) and the internal dehydrating section (c) are located below the chain conveyor belt (5) or between the upper and lower belt bodies; The heat supply air box (l) of the rapid dehydration section (b) is located below the chain conveyor belt (5) or between the upper and lower belt bodies, and the circulation air box (m) and moisture removal air box (n) of the rapid dehydration section (b) are located above the chain conveyor belt (5).

4. The chain plate type rapid drying kiln according to claim 2, characterized in that: The heat supply air box (l) comprises a main box body (l1), a ventilation box groove (l2) and a ventilation hole (l3); the ventilation box groove (l2) is provided inside the main box body (l1); one end of the ventilation box groove (l2) penetrates the main box body (l1); a ventilation hole (l3) is also penetrated on one end surface of the main box body (l1); the ventilation hole (l3) is communicated with the ventilation box groove (l2); and the ventilation hole (l3) is assembled toward the blank (9).

5. The chain plate type rapid drying kiln according to claim 4, characterized in that: The structures of the circulation wind box (m) and the moisture exhaust wind box (n) are the same as the structure of the heat supply wind box (l).

6. The chain plate type rapid drying kiln according to claim 2, characterized in that: The valve (q) is a PLC electronically controlled valve, and the processing section (d) also includes a temperature and humidity sensor, which is respectively arranged in the hot air supply duct (h), the dehumidification air duct (i), the circulation air duct (v) and the heat supply pipe (7). The temperature and humidity sensor controls the opening of the valve (q) by monitoring the temperature and humidity.

7. The chain plate type rapid drying kiln according to claim 2, characterized in that: The first dehumidification pipe (t) comprises a protective layer (r1), thermal insulation cotton (r2) and a pipe body (r3); the thermal insulation cotton (r2) is evenly wrapped around the outside of the pipe body (r3); the protective layer (r1) is further wrapped around the outside of the thermal insulation cotton (r2); the protective layer (r1) is made of an aluminum plate; the structures of the dehumidification pipe (1), the heat delivery pipe (7), the second heat delivery pipe (s), the first dehumidification pipe (t) and the second dehumidification pipe (u) are all consistent with the structure of the first heat delivery pipe (r).

8. The chain plate type rapid drying kiln according to claim 2, characterized in that: The support plate body (g) is made of reinforced concrete, the fixed platform (j) is made of I-beam or reinforced concrete, the insulation board (k) is a prestressed board, the insulation layer (o) is a vacuum groove or is made of thermal insulation material, and the partition (p) is made of thermal insulation material.

9. The chain plate type rapid drying kiln according to claim 2, characterized in that: The processing section (d) is provided with one or more heat supply wind boxes (l), circulation wind boxes (m) and moisture removal wind boxes (n).

10. A method for using the chain plate type rapid drying kiln according to claim 2, characterized in that: The following steps are involved:

1. Setting a moisturizing and dehydrating section (a), a rapid dehydrating section (b) and an internal dehydrating section (c), and setting the corresponding number of processing sections (d) in the moisturizing and dehydrating section (a), the rapid dehydrating section (b) and the internal dehydrating section (c) according to production requirements; 2. placing the blank (9) on the chain conveyor belt (5) at an angle; 3. The processing section (d) of the moisturizing and dehydrating section (a) is placed in a positive pressure drying state, and the humidifier (8) is connected to the second hot air blower (e) at the entrance of the moisturizing and dehydrating section (a), and as the circulating humidity of the processing section (d) at the entrance of the moisturizing and dehydrating section (a) gradually increases, the humidity supply of the humidifier (8) to the second hot air blower (e) is gradually reduced until it reaches zero; The initial heat supply humidity of the moisturizing and dehydrating section (a) is set to be ≥40%, the initial heat supply temperature is 10-15°C higher than the temperature of the brick body (9), the initial heat supply air volume is 2000±100m³ / h, the initial dehydration rate of the brick body is ≤3.1%, the initial moisture exhaust air volume is ≤12000m³ / h, and the initial moisture exhaust degree is ≤81%; The heat supply temperature, heat supply air volume and exhaust humidity from the inlet to the outlet of the moisturizing and dehydrating section (a) are gradually increased, the exhaust humidity volume decreases first and then increases, the heat supply humidity gradually decreases and the decrease is ≤1%, the heat supply temperature is increased to 60±3℃, the exhaust humidity volume is increased to 14000±100m³ / h, and the heat supply air volume is increased to 11000±100m³ / h, so that the dehydration rate of the green body is ≤5%; 4. placing the rapid dehydration section (b) in a negative pressure drying state; The heat supply temperature from the inlet side to the outlet side of the rapid dehydration section (b) is gradually increased, the heat supply air volume, moisture exhaust air volume and moisture exhaust humidity are first increased and then decreased, and the heat supply humidity is gradually decreased and the decrease is ≤1%, so that the dehydration rate of the green body is gradually increased; 5. placing the processing section (d) of the internal dehydration section (c) in a positive pressure drying state; The heat supply temperature from the inlet side to the outlet side of the internal dehydration section (c) is gradually increased, and the heat supply air volume, moisture exhaust air volume and moisture exhaust humidity are gradually reduced. The heat supply humidity first decreases with a decrease of ≤1% and finally maintains at 30%, so that the dehydration rate of the green body gradually decreases.

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