A chain plate type rapid drying kiln and its use method

Abstract

The invention discloses a chain plate type rapid drying kiln and a method for using the same, belonging to the field of drying kilns. The kiln comprises a dehumidification pipeline, a drying kiln, a first dehumidification fan, a robot, a chain plate conveyor belt, a first hot air blower, a hot air pipeline and a humidifier. The drying kiln comprises a moisturizing and dehydrating section, a quick dehydrating section and an internal dehydrating section. The kiln body is divided into three sections, each of which is composed of a plurality of independent processing sections, each of which is equipped with an independent heat supply, humidity circulation and dehumidification structure. Different drying paths of the three sections are designed so that when the drying kiln is used, each section can perform independent multivariable dehydration adjustment. The top heat supply, bottom circulation and dehumidification of the moisturizing and dehydrating section and the internal dehydrating section, as well as the bottom heat supply, top circulation and dehumidification of the quick dehydrating section, facilitate better and more reasonable curve drying of the blank, ensure drying efficiency and reduce secondary moisture and damage of the blank.

Description

Technical Field

[0001] The invention belongs to the field of drying kilns, and in particular relates to a chain plate type rapid drying kiln and a use method thereof. Background Art

[0002] A drying kiln is a large-scale drying equipment used in industrial production, and is commonly used for drying various blanks. High-sensitivity coefficient materials refer to materials that are generally underground or in specific areas, and have not failed naturally or physically. The content of kaolinite, montmorillonite, and jellyfish in clay minerals or shale is greater than 10%. When the blank is made of high-sensitivity coefficient materials, because the blank material will have a certain temperature and humidity inside after molding, and the material sensitivity coefficient is high, and when the blank is dried, the traditional drying kiln has a simple structure, a single drying path, poor drying controllability, and low uniformity, and cannot meet the drying requirements of the blank at different drying stages, which can easily lead to cracks and morphological changes in the blank during the drying process, and easily cause energy waste, and because the traditional drying kiln does not dry the blank enough, it is easy to produce black spots and adhesions due to stacking during the subsequent sintering process; and when the traditional drying kiln is drying, the hot air moisture is easy to adhere during pipeline transportation, resulting in insufficient humidity in the kiln, which in turn causes the blank to crack due to excessive humidity difference. Summary of the invention

[0003] 1. Technical issues to be resolved

[0004] In order to overcome the shortcomings of the prior art, a chain plate type rapid drying kiln and a method for using the same are proposed to solve the problem that when the green body is made of a material with a high sensitivity coefficient, the green body material will have a certain temperature and humidity inside after forming, and the material sensitivity coefficient is high. When the green body is dried, the traditional drying kiln has a simple structure, a single drying path, poor drying controllability, and low uniformity, which cannot meet the drying requirements of the green body at different drying stages, which easily leads to cracks and morphological changes in the green body during the drying process, and easily causes energy waste. In addition, the traditional drying kiln is not dry enough for the green body, and black spots and adhesion are easily generated due to stacking during the subsequent sintering process.

[0005] Secondly, it can solve the problem that in traditional drying kilns, hot air and moisture are easily attached during pipeline transportation, resulting in insufficient humidity in the kiln, which in turn causes the green body to crack due to excessive humidity difference.

[0006] (II) Technical solution

[0007] The present invention is implemented through the following technical scheme: The present invention proposes a chain plate type rapid drying kiln, which structure includes a dehumidification pipeline, a drying kiln, a first dehumidification fan, a robot, a chain plate conveyor belt, a first hot air blower and a heat supply pipeline, wherein the drying kiln is connected to the first dehumidification fan through the dehumidification pipeline, the drying kiln is connected to the first hot air blower through the heat supply pipeline, the chain plate conveyor belt runs through the drying kiln, the two ends of the chain plate conveyor belt are located outside the drying kiln and are connected to the robot, and the robot is used to place the blank on the chain plate conveyor belt;

[0008] Also includes a humidifier;

[0009] The drying kiln comprises a moisturizing and dehydrating section, a rapid dehydrating section and an internal dehydrating section, wherein the moisturizing and dehydrating section is located at the inlet side of the green body, the internal dehydrating section is located at the outlet side of the green body, the rapid dehydrating section is located between the moisturizing and dehydrating section and the internal dehydrating section, and the humidifier is connected to the moisturizing and dehydrating section adjacent to the inlet side of the green body;

[0010] The moisturizing and dehydrating section, the rapid dehydrating section and the internal dehydrating section are all composed of more than one processing section, and the processing sections are sealed at the fixed connections between each other;

[0011] The treatment sections of the moisturizing and dehydrating section and the internal dehydrating section adopt the method of top heat supply, bottom circulation and bottom moisture discharge to dry the green body;

[0012] The processing section of the rapid dehydration section adopts the method of bottom heat supply, top circulation and top moisture discharge to dry the green body;

[0013] The processing sections of the moisturizing and dehydrating section, the rapid dehydrating section and the internal dehydrating section 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, the rapid dehydrating section and the internal dehydrating section.

[0014] Furthermore, the control device of the processing section includes a second heat supply fan, a second dehumidification fan, a support plate body, a heat supply air duct, a dehumidification air duct, a fixed platform, a heat insulation board, a heat supply air box, a circulating air box, a dehumidification air box, a heat insulation layer, a partition, a valve, a first heat supply pipe, a second heat supply pipe, a first dehumidification pipe, a second dehumidification pipe, a circulating air duct and a drying room, a heat insulation layer is provided inside the support plate body, the support plate body is provided with two pieces, the support plate bodies are assembled in parallel, and more than two pieces of the heat insulation boards are vertically fixed between the support plate bodies, and every two pieces of the heat insulation boards form a drying room between the support plate bodies, and the chain plate conveyor belt is arranged under the drying room;

[0015] The drying room is also equipped with a heat supply air box, a circulation air box and a moisture exhaust air box, the circulation air box and the moisture exhaust air box have the same height, the heat supply air box is located at the inlet side of the circulation air box adjacent to the processing section, and the moisture exhaust air box is located at the outlet side of the circulation air box adjacent to the processing section, the heat supply air box, the circulation air box and the moisture exhaust air box adjacent to the blank side are all in communication with the drying room, a fixed platform is fixed on the top of the support plate body, and the fixed platform is used to install a second heat supply blower and a second moisture exhaust blower, the heat insulation layer is respectively separated by partitions with a heat supply air duct, a dehumidification air duct and a circulation air duct, the air outlet of the second heat supply blower is connected to the heat supply air box through the first heat supply pipe and the heat supply air duct, the circulating air box is connected to one end of the second heat supply pipe through the circulation air duct away from the first heat supply pipe, the other end of the second heat supply pipe is connected to the air inlet of the second heat supply air fan, and the second heat supply pipe is also connected to the heat supply air box. Pipe, so that the inlet of hot air and the outlet of dehumidification air are located on both sides of the drying room, and the air in the kiln flows from one side of the drying room to the other side, ensuring the smoothness of the air duct when circulating humidity is used to supply heat. The dehumidification air box is adjacent to the first heat supply pipe side and is connected to the air inlet of the second dehumidification fan through the dehumidification air duct and the first dehumidification pipe. The air outlet of the second dehumidification fan is connected to the dehumidification pipe through the second dehumidification pipe, so that the inlet of hot air and the outlet of dehumidification air are located on the same side of the drying room, and the air in the kiln flows back from one side of the drying room to be discharged on the same side, and the air duct for relative circulating heat supply is changed in direction, so that the air duct in a single processing section will be dried in a changed direction, which better ensures the uniformity of drying. The connection between the dehumidification air box and the dehumidification air duct is equipped with a valve, and the connection between the circulating air box and the circulating air duct, the connection between the heat supply air box and the hot air duct, and the connection between the heat supply pipe and the second heat supply pipe are also equipped with valves.

[0016] Furthermore, the heat supply bellows of the moisturizing and dehydrating section and the internal dehydrating section are located above the chain conveyor belt, and the circulation bellows and moisture removal bellows of the moisturizing and dehydrating section and the internal dehydrating section are located below the chain conveyor belt or between the upper and lower belt bodies;

[0017] The heat supply air box of the rapid dehydration section is located below the chain conveyor belt or between the upper and lower belt bodies, and the circulation air box and moisture removal air box of the rapid dehydration section are located above the chain conveyor belt.

[0018] Furthermore, the heat supply 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, one end of the ventilation box groove passes through the main box body, and a ventilation hole is also penetrated on one side end face of the main box body. The ventilation hole is communicated with the ventilation box groove, and the ventilation hole is assembled toward the blank.

[0019] Furthermore, the structures of the circulation bellows and moisture exhaust bellows are the same as that of the heat supply bellows.

[0020] Furthermore, the valve is a PLC electronically controlled valve, and the processing section also includes a temperature and humidity sensor, which is respectively arranged in the hot air duct, dehumidification air duct, circulation air duct and heat supply pipe. The temperature and humidity sensor controls the opening of the valve by monitoring the temperature and humidity.

[0021] Furthermore, the heat insulating layer is a vacuum groove or is made of a heat insulating material, and the partition is made of a heat insulating material.

[0022] Furthermore, the support plate body is made of reinforced concrete, the fixed platform is made of I-beam or reinforced concrete, and the insulation board is a prestressed board.

[0023] Furthermore, the processing section is provided with at least one heat supply wind box, a circulation wind box and a moisture exhaust wind box.

[0024] Furthermore, the first moisture dissipation pipe comprises a protective layer, thermal insulation cotton and a pipe body, the thermal insulation cotton is evenly wrapped on the outside of the pipe body, and the protective layer is further wrapped on the outside of the thermal insulation cotton;

[0025] Furthermore, the protective layer is made of aluminum plate;

[0026] Furthermore, the structures of the dehumidification pipe, the heat delivery pipe, the second heat delivery pipe, the first dehumidification pipe and the second dehumidification pipe are consistent with the structure of the first heat delivery pipe.

[0027] Furthermore, it also relates to a method for using a chain plate type rapid drying kiln;

[0028] The following steps are involved:

[0029] 1. Set up a moisturizing and dehydrating section, a rapid dehydrating section and an internal dehydrating section, and set the corresponding number of processing sections in the moisturizing and dehydrating section, the rapid dehydrating section and the internal dehydrating section according to production requirements;

[0030] 2. Place the green body on the chain conveyor belt at an angle so that the gas is fed in from the top or bottom and discharged from the other side during drying, so that the gas can pass through the internal holes and the outside of the green body better, thereby increasing the contact surface and further improving the drying efficiency;

[0031] 3. Make the treatment 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 entrance of the moisturizing and dehydrating section. As the circulating humidity of the treatment section at the entrance of the moisturizing and dehydrating section gradually increases, the humidity supply of the humidifier to the second hot air blower is gradually reduced until it reaches zero;

[0032] Set the initial heat supply humidity of the moisturizing and dehydrating section to ≥40%, the initial heat supply temperature to be 10-15℃ higher than the body temperature, the initial hot air volume to be 2000±100m³ / h, the initial dehydration rate of the brick to be ≤3.1%, the initial moisture exhaust air volume to be ≤12000m³ / h, and the initial moisture exhaust degree to be ≤81%;

[0033] The heat supply temperature, heat supply air volume and exhaust humidity from the inlet to the outlet of the moisturizing and dehydrating section are set to increase gradually, the exhaust air volume decreases first and then increases, the heat supply humidity gradually decreases and the decrease is ≤1%, the heat supply temperature increases to 60±3℃, the exhaust air volume increases to 14000±100m³ / h, and the heat supply air volume increases to 11000±100m³ / h, so that the dehydration rate of the green body is ≤5%;

[0034] 4. Make the rapid dehydration section in a negative pressure drying state;

[0035] The heat supply temperature from the inlet side to the outlet side of the rapid dehydration section is set to increase gradually, the heat supply air volume, moisture exhaust air volume and moisture exhaust humidity are increased first 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;

[0036] 5. Make the treatment section of the internal dehydration section in a positive pressure drying state;

[0037] The heat supply temperature from the inlet side to the outlet side of the internal dehydration section is set to gradually increase, and the hot 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.

[0038] (III) Beneficial effects

[0039] One of the above technical solutions has the following advantages or beneficial effects:

[0040] To solve the problem that when the green body is made of high-sensitivity materials, the green body material will have a certain temperature and humidity inside after molding, and the material sensitivity coefficient is high. When the green body is dried, the traditional drying kiln has a simple structure, a single drying path, poor drying controllability, and low uniformity, which cannot meet the drying requirements of different drying stages of the green body, which easily leads to cracks and morphological changes in the green body during the drying process, and easily causes energy waste. In addition, the traditional drying kiln is not dry enough for the green body, and black spots and adhesion are easily generated due to stacking during the subsequent sintering process. In the traditional drying kiln, when drying, hot air and moisture are easily attached during pipeline transportation, resulting in insufficient humidity in the kiln, which further causes the green body to crack due to excessive humidity difference.

[0041] 1. The kiln body is divided into three sections, each of which is composed of multiple independent processing sections. Each processing section is equipped with independent heat supply, humidity circulation and moisture removal structures. The drying path design with different requirements of the three sections enables each section to perform independent multi-variable drying and dehydration adjustment, which can achieve a better drying and dehydration curve and reduce energy waste.

[0042] 2. Combined with the design of top air intake, bottom circulation and bottom moisture discharge in the moisturizing and dehydrating section, the drying gas can be circulated in a breeze and positive pressure state, so that the green body can be in a positive pressure drying, breeze, low temperature and moisturizing drying state after entering the kiln body, avoiding the cracking and deformation of the green body caused by high temperature, high air volume and low humidity. After the green body enters the rapid dehydration section after drying to a certain extent, it has a certain strength. At this time, the kiln is converted into negative pressure drying, and high air volume, slightly high temperature and moderate humidity are used to quickly dehydrate the green body, thereby increasing the dehydration efficiency. Since the moisture discharge and circulation are at the top, the hot gas can rise smoothly, making it easier for a large amount of evaporated humid gas to enter the moisture discharge and circulation pipelines, preventing the top of the kiln from being too high in humidity. Condensation, and water droplets falling back onto the green body, causing green body damage and secondary moisture. After rapid dehydration, the green body enters the internal dehydration section. At this time, because the green body surface is basically dry, but there is still moisture inside the green body that has not been removed, but the green body moisture is relatively low, and high air volume is not required. Therefore, the design of top air intake, bottom circulation and bottom moisture discharge is adopted. The kiln is transformed into a drying state of positive pressure drying, light wind, high temperature and low humidity, so that the temperature inside the green body rises, and the internal moisture is quickly vaporized, making the drying kiln structure more reasonable, facilitating the formation of a better drying and dehydration curve, ensuring efficiency, and improving the drying quality of the green body, so that the green body can have a better drying effect, so that the green body will not have black spots and adhesion when stacked during subsequent sintering;

[0043] 3. At the same time, by setting the circulating wind box between the heat supply wind box and the moisture exhaust wind box, the moisture discharged after the green body is dried is first extracted by the circulating pipeline for humidity recycling. The moisture pipeline is short, which avoids the consumption of moisture in the supply pipe of the heat supply pipe, ensures that the humidity in the kiln can be controlled and adjusted more timely, reduces the problem of green body cracking due to humidity difference, and can also reduce the supply of external moisture, so as to better save energy;

[0044] 4. When a circulating wind box is set between the heat supply wind box and the dehumidification wind box in a single processing section, the air outlets of the circulating wind box and the dehumidification wind box are also placed on opposite sides, so that a single processing section will have two different air duct paths when used for drying. Combined with the setting of multiple processing sections, the uniformity is better and the uneven drying caused by a single path is avoided;

[0045] 5. A multi-layer protection structure is designed for the pipeline outside the kiln to provide better protection for the pipeline, reduce pipeline leakage, better preserve the heat in the pipeline, reduce heat loss, facilitate heating and heat recovery, and achieve higher energy-saving efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings:

[0047] Figure 1 It is a cross-sectional structural schematic diagram of the front view of the present invention;

[0048] Figure 2 For the present invention Figure 1 A is a schematic diagram of the enlarged structure of the middle part;

[0049] Figure 3 For the present invention Figure 1 A schematic diagram of the enlarged structure of B;

[0050] Figure 4 For the present invention Figure 1 The enlarged cross-sectional structure diagram of C in the middle;

[0051] Figure 5 It is a schematic structural diagram of a top view of a drying kiln of the present invention;

[0052] Figure 6 This is a schematic structural diagram of the present invention except for the top view when the blank is placed on the chain conveyor belt;

[0053] Figure 7 It is a cross-sectional schematic diagram of the side view of the hot air supply pipe of the moisturizing and dehydrating section and the internal dehydrating section of the present invention;

[0054] Figure 8 It is a schematic cross-sectional structure 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;

[0055] Fig. 9 It is a schematic cross-sectional structure diagram of the side view of the moisture-retaining and dehydration section and the moisture-removing air duct of the internal dehydration section of the present invention;

[0056] Fig.10 It is a schematic cross-sectional structure diagram of a side view of a hot air supply pipe in a rapid dehydration section of the present invention;

[0057] Fig.11 It is a schematic diagram of the cross-sectional structure arrangement of the side view of the circulating air duct of the rapid dehydration section of the present invention;

[0058] Fig.12 It is a schematic cross-sectional structure diagram of a side view of a moisture-removing air duct in a rapid dehydration section of the present invention;

[0059] Fig.13It is a schematic diagram of the cross-sectional structure of the heat supply air box of the present invention;

[0060] Fig.14 is a schematic cross-sectional structure diagram of the first heat transfer pipe of the present invention;

[0061] Fig.15 It is a schematic cross-sectional structure diagram of a front view of a fourth embodiment of the present invention;

[0062] Fig.16 It is a schematic diagram of the structure of a top view of a fourth embodiment of the present invention;

[0063] In the figure: dehumidification pipe-1, drying kiln-2, first dehumidification fan-3, robot-4, chain conveyor belt-5, first hot air blower-6, heat supply pipe-7, humidifier-8, placement of blank-9, moisturizing and dehydration section-a, rapid dehydration section-b, internal dehydration section-c, processing section-d, second hot air blower-e, second dehumidification fan-f, supporting plate-g, hot air duct-h, dehumidification air duct-i, fixed platform-j, insulation board-k, hot air box-l, circulating air box-m, dehumidification bellows-n, insulation layer-o, partition-p, valve-q, first heat supply pipe-r, second heat supply pipe-s, first dehumidification pipe-t, second dehumidification pipe-u, circulating air duct-v, drying room-w, main box-l1, ventilation box slot-l2, ventilation hole-l3, protective layer-r1, thermal insulation cotton-r2, pipe body-r3. DETAILED DESCRIPTION

[0064] The present invention is further described in detail below in conjunction with examples, but the embodiments of the present invention are not limited thereto.

[0065] Embodiment 1:

[0066] The present invention provides a chain plate type rapid drying kiln: its structure includes a dehumidification pipeline 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 pipeline 7, the drying kiln 2 is connected to the first dehumidification fan 3 through the dehumidification pipeline 1, the drying kiln 2 is connected to the first hot air blower 6 through the heat supply pipeline 7, the chain plate conveyor belt 5 is arranged through the drying kiln 2, the 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;

[0067] Also includes a humidifier 8;

[0068] The drying kiln 2 includes 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;

[0069] The moisturizing and dehydrating section a, the rapid dehydrating section b and the internal dehydrating section c are all composed of more than one processing section d, and the processing sections d are sealed at the fixed connections between each other;

[0070] The treatment section d of the moisturizing and dehydrating section a and the internal dehydrating section c uses the top heat supply, bottom circulation and bottom moisture discharge method to dry the blank 9;

[0071] The processing section d of the rapid dehydration section b uses the method of bottom heat supply, top circulation and top moisture removal to dry the blank 9;

[0072] The moisturizing and dehydrating section a adopts positive pressure drying and breeze drying, and the heat supply temperature is gradually increased from close to the temperature of the green body 9 to 60±3°C, and the heat supply humidity is gradually reduced from above ≥40% and the reduction is ≤1% to remove the surface moisture of the green body 9;

[0073] The rapid dehydration section b adopts negative pressure drying and high air volume drying, and the temperature gradually rises to close to or reaches the traditional drying temperature of the kiln, and most of the moisture of the green body 9 is removed when the humidity continues to decrease and the decrease is ≤1%;

[0074] The internal dehydration section c adopts positive pressure drying and breeze drying methods, and the temperature is increased to reach or exceed the traditional drying temperature of the kiln. The humidity continues to decrease with a decrease of ≤1% and finally maintained at 30% to remove the internal moisture of the blank 9.

[0075] Furthermore, the control device of the processing section d includes a second heat supply fan e, a second dehumidification fan f, a support plate body 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, a heat insulation layer o is provided inside the support plate body g, two support plate bodies g are provided, the support plate bodies g are assembled in parallel, two or more heat insulation boards k are vertically fixed between the support plate bodies g, and every two heat insulation boards k form a drying room w between the support plate bodies g, and the chain plate conveyor belt 5 is arranged under the drying room w;

[0076] 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. The circulation air box m and the dehumidification air box n have the same height. The heat supply air box l is located on the inlet side of the circulation air box m adjacent to the processing section d, and the dehumidification air box n is located on the outlet side of the circulation air box m adjacent to the processing section d. 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. The fixed platform j is used to install a second heat supply fan e and a second dehumidification fan f. 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 partitions p. The air outlet of the second heat supply fan e is connected to the hot air duct h through the first heat supply pipe r. The heat supply air box l, the circulating air box m is connected to one end of the second heat supply pipe s through the circulating air duct v on the side 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 blower e, and the second heat supply pipe s is also connected to the heat supply pipe 7, the dehumidification air box n is connected to the air inlet of the second dehumidification fan f through the dehumidification air duct i and the first dehumidification pipe t on the side adjacent to the first heat supply pipe r, the air outlet of the second dehumidification fan f is connected to the dehumidification pipe 1 through the second dehumidification pipe u, the connection between the dehumidification air box n and the dehumidification air duct i is equipped with a valve q, the connection between the circulating air box m and the circulating air duct v, the connection between the heat supply air box l and the hot 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.

[0077] Furthermore, the blank 9 is a brick blank.

[0078] Furthermore, the heat supply 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 circulation air box m and moisture removal 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 belt bodies;

[0079] 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.

[0080] Furthermore, the heat supply air box 1 includes a main box body 11, a ventilation box groove 12 and a ventilation hole 13. The ventilation box groove 12 is provided inside the main box body 11, and one end of the ventilation box groove 12 penetrates the main box body 11. A ventilation hole 13 is also penetrated on one end face of the main box body 11. The ventilation hole 13 is communicated with the ventilation box groove 12, and the ventilation hole 13 is assembled toward the blank 9.

[0081] Furthermore, the structures of the circulation wind box m and the moisture removal wind box n are the same as that of the heat supply wind box l.

[0082] Furthermore, the heat insulating layer o is a vacuum groove or is made of a heat insulating material, and the partition p is made of a heat insulating material.

[0083] Furthermore, the supporting plate body g is made of reinforced concrete, the fixed platform j is made of I-beam or reinforced concrete, and the insulation board k is a prestressed floor slab or is made of prestressed steel.

[0084] Furthermore, the processing section d is provided with at least one heat supply wind box l, a circulation wind box m and a moisture removal wind box n.

[0085] Implementation scheme: During use, the green body 9 is sent into the drying kiln 2 through the chain conveyor belt 5. At this time, the humidifier 8 can perform preliminary humidification for the second hot air blower e of the processing section d at the entrance of the moisturizing and dehydrating section a to ensure that the green body 9 has a moderate humidity when entering the kiln for drying, and prevent the green body 9 from cracking due to excessive humidity difference between the hot gas and the green body 9;

[0086] The independent second hot air blower e and the second dehumidification blower f can make the processing section d perform drying temperature and humidity control independently, so that the green body 9 in the moisturizing and dehydrating section a is in a drying state of positive pressure, breeze, low temperature and moisturizing. At this time, the dehumidification bellows n and the circulating bellows m of the moisturizing and dehydrating section a are located below the green body 9, and the hot air blower l is located above the green body 9, so that the humid gas can enter the circulating bellows m and the dehumidification bellows n without high air volume in the kiln, avoiding the 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 bellows m reaches the humidity requirement at the inlet, and the humidity supply of the humidifier 8 can be gradually reduced to realize humidity self-circulation and reduce the waste of water resources.

[0087] 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 forms a negative pressure through independent fan control, a rapid drying state with high flow rate, high temperature and moderate humidity, the circulation bellows m and the dehumidification bellows n are changed to the top of the green body 9, and the heat supply bellows l is changed to the bottom of the green body 9. The kiln is transformed into negative pressure drying, and the green body 9 is rapidly dehydrated in a manner of 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 smoothly, which makes it easier for a large amount of evaporated humid gas to enter the dehumidification and circulation pipelines, preventing water condensation at the top of the kiln due to excessive moisture, and water droplets falling back on the green body to cause green body damage and secondary moisture.

[0088] Finally, the green body 9 enters the internal dehydration section c after being rapidly dehydrated in the rapid dehydration section b. At this time, because the surface of the green body 9 is basically dry, but there is still moisture inside the green body 9 that has not been dehydrated, because the moisture content of the green body 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 in which the moisture exhaust bellows n and the circulation bellows m are located below the green body 9, and the heat supply bellows l is located above the green body 9. The kiln is transformed into a drying state of positive pressure drying, light wind, high temperature and low humidity, so that the temperature inside the green body 9 rises, and the internal moisture is quickly vaporized, so that the structure of the drying kiln is more reasonable, which is convenient for forming a better drying and dehydration curve, ensuring efficiency while also improving the drying quality of the green body;

[0089] At the same time, the kiln body adopts the first dehumidification fan 3 to connect the air outlets of all the second dehumidification fans f, and the first hot supply fan 6 to connect the air outlets of all the second hot supply fans e, so that the dehumidification and heat supply pressures are sufficient to prevent the phenomenon of backfilling and insufficient heat supply, and by arranging the circulating air box m between the hot supply air box l and the dehumidification air box n, the moisture discharged from the green body 9 after drying is preferentially extracted by the circulating pipeline for humidity recycling, and the moisture pipeline is short to avoid the consumption of water in the supply pipe of the heat supply pipe, thereby ensuring that the humidity in the kiln can be controlled and adjusted more timely, reducing the problem of green body cracking due to humidity difference, and at the same time can also reduce the supply of external moisture, so as to better save energy.

[0090] Embodiment 2:

[0091] Compared with the first embodiment, the valve q of this embodiment is a PLC electronically controlled valve, and the processing section d also includes a temperature and humidity sensor (not shown in the figure), which is respectively arranged in the hot air 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.

[0092] Compared with the first embodiment, this embodiment is more intelligent and can adjust the temperature and humidity in the kiln more timely.

[0093] Embodiment three:

[0094] like Fig.14 As shown, compared with the first embodiment, the first moisture dissipation pipe t of the present embodiment includes a protective layer r1, thermal insulation cotton r2 and a pipe body r3, the thermal insulation cotton r2 is evenly wrapped on the outside of the pipe body r3, and the protective layer r1 is further wrapped on the outside of the thermal insulation cotton r2;

[0095] Furthermore, the protective layer r1 is made of aluminum plate;

[0096] Furthermore, the structures of the kiln body external pipes such as 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 consistent with the structure of the first heat delivery pipe r.

[0097] Compared with the first embodiment, the pipeline outside the kiln in this embodiment is better protected, which can reduce pipeline leakage, and can better preserve the heat in the pipeline, reduce heat loss, facilitate heating and heat recovery, and have higher energy-saving efficiency.

[0098] Embodiment 4:

[0099] A method for using a chain plate type rapid drying kiln;

[0100] The following is a method for using a porous brick blank made of a material with a high sensitivity coefficient of 1, and using the brick blank for drying in a kiln in the first embodiment, the second embodiment, or the third embodiment. It does not mean that all blank products need to use the same parameters, and includes the following steps:

[0101] 1. According to the product requirements, set the No. 1-5 processing sections d as the moisturizing and dehydration sections a, set the No. 6-10 processing sections d as the rapid dehydration sections b, and set the No. 11-15 processing sections d as the internal dehydration sections c;

[0102] Second, place the bricks on the chain conveyor belt 5 at an angle, so that when the bricks are dried, gas is fed in from the top or bottom and discharged from the other side, so that the gas can better pass through the internal holes and the outside of the bricks, thereby increasing the contact surface and further improving the drying efficiency;

[0103] 3. Set the parameters of each processing section d as shown in the following table:

[0104]

[0105]

[0106]

[0107] The brick blank forms a reasonable curve drying process. In the moisturizing and dehydrating section a, the brick blank is controlled to be in a moisturizing and drying state of slight positive pressure, slight wind, low temperature and high humidity when it just enters. At this time, the circulating bellows m and the dehumidifying bellows n are at the bottom of the brick blank, and the hot air box l is at the top of the brick blank. The hot air box l blows weak high-humidity hot air close to the humidity of the brick blank from top to bottom. The drying of slight positive pressure and slight wind can prevent the brick blank from being deformed due to excessive pressure or being washed by high wind speed. The moist hot air with close humidity can ensure that the brick blank is in In the dehydration state, the bricks are prevented from cracking due to excessive humidity difference, so that the bricks are in a mild dehydration state. As the bricks are gradually dehydrated and shaped, the heat supply temperature, heat supply air volume and moisture exhaust intensity gradually increase, and the moisture exhaust air volume also increases, while the heat supply humidity gradually decreases, gradually increasing the dehydration intensity of the bricks to ensure the drying efficiency of the bricks. In addition, the moisture exhaust air volume at the entrance of the first processing section d where the bricks enter is higher than that of the wet dehydration section a, which can reduce the overflow of moisture to the entrance of the bricks;

[0108] After the bricks are dehydrated and shaped to a certain extent, they enter the rapid dehydration section b. The circulating bellows m and dehumidification bellows n are on the top of the bricks, and the hot air supply bellows l are changed to the bottom of the bricks. At this time, the bricks have a certain shape and are not easy to deform. The kiln adopts a rapid drying state with high wind speed, high temperature and moderate humidity. The bricks will be dehydrated in large quantities. At this time, the circulating bellows m and dehumidification bellows n on the top will make it easier to discharge a large amount of moisture and reduce the condensation of moisture in the kiln, thereby preventing water drops from dripping on the bricks to cause damage to the body and secondary moisture.

[0109] After the bricks are rapidly dehydrated, they enter the internal dehydration section c. At this time, the external moisture of the bricks 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 moisture exhaust air box n are set back at the bottom of the bricks, and the hot air box l is set at the top of the bricks, so that the kiln is in a drying state of positive pressure, light wind, high temperature and low humidity, so that the temperature inside the bricks rises and the internal moisture is quickly vaporized and removed.

[0110] This ensures that the bricks can prevent cracking, black spots and adhesion while ensuring dehumidification efficiency, thereby improving the quality of the finished product.

[0111] In the description of the present invention, it should be noted that negative pressure drying: placing the material in a fixed closed container, forming a low-pressure environment by reducing pressure or exhausting air, so that water, solvents, etc. are dried by evaporation or evaporation condensation. In this process, steam needs to be discharged by continuous exhausting. The negative pressure environment will improve the drying efficiency of the material and shorten the drying time.

[0112] Positive pressure drying: The drying gas flowing along the direction of material movement is directly compressed to a pressure higher than the ambient pressure of the material, forming a positive pressure environment ≥ atmospheric pressure, thereby achieving material drying. In this process, the hot air flow is directly sprayed onto the surface of the material, drying it through heat conduction and extracting excess moisture and solvent at the same time.

[0113] Slightly positive pressure refers to the positive pressure drying state where the pressure of the brick embryo is relatively small after the drying method changes from negative pressure to positive pressure in the kiln environment. It is generally a drying state when the pressure is close to atmospheric pressure.

[0114] The directions or positional relationships indicated by the terms "up", "down", "left", "right", etc. are based on the directions or positional relationships shown in the drawings and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the devices or elements referred to must have a specific direction, be constructed and operate in a specific direction. Therefore, they should not be understood as limitations on the present invention.

[0115] The control method of the present invention is to start and close the switch manually or use an intelligent system such as PLC to control. The wiring diagram of the power element and the provision of power supply are common knowledge in the field, and the present invention is mainly used to protect the kiln structure, ventilation principle and temperature and humidity control methods, so the present invention will no longer explain the control method and wiring layout in detail.

[0116] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the attached claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0117] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes 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 curvilinear drying environments are formed in the moisturizing and dehydrating section (a), the rapid dehydrating section (b) and the internal dehydrating section (c); The moisturizing and dehydrating section (a) adopts a positive pressure drying and light breeze drying method, the rapid dehydrating section (b) adopts a negative pressure drying and high air volume drying method, and the internal dehydrating section (c) adopts a positive pressure drying and light breeze drying method.

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 blank (9), the initial heat supply air volume is 2000±100m³ / h, the initial dehydration rate of the blank (9) 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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