Paper production equipment

Abstract

The utility model discloses paper production equipment, and belongs to the field of paper processing. According to the technical scheme, the paper production equipment comprises a drying box body, the drying box body is fixedly connected with two partition plates, and the two partition plates are arranged in the length direction of the drying box body at intervals so as to sequentially divide the interior of the drying box body into a first-stage drying cabin, a second-stage drying cabin and a third-stage drying cabin; a drying assembly and an air exhaust mechanism are arranged in the second-stage drying cabin; through the arrangement of the first-stage drying cabin, the second-stage drying cabin and the third-stage drying cabin, the drying box body can be divided into a plurality of temperature zones in the paper web conveying direction, gradual temperature rising and drying are achieved, and paper is prevented from generating stress deformation due to sudden heating; and waste heat in the second-stage drying cabin can be recycled by the first-stage drying cabin and the third-stage drying cabin, meanwhile, a temperature gradient is formed, and the paper yield is increased.

Description

TECHNICAL FIELD

[0001] The utility model belongs to paper processing field, concretely relates to a paper production equipment. BACKGROUND

[0002] Antibacterial paper is a kind of special paper that is endowed with the function of inhibiting or killing microorganisms (such as bacteria, mold, etc.) by adding antibacterial agent or using special process. The production process of antibacterial paper generally includes pulp processing, paper forming, drying, sterilization, coating, calendering, cutting and packaging, etc., and the drying and setting of paper is an important link to determine the quality of paper. The existing paper drying process is carried out in the drying cylinder, and generally needs a conveying mechanism to transport the wet paper web with high water content into the drying cylinder, and evaporates the water in the wet paper web by using the high temperature in the drying cylinder to dry it.

[0003] However, the temperature and humidity conditions in the existing drying cylinder are single, which makes the paper dry at a certain fixed temperature and humidity, which can easily cause stress deformation and cracks in the paper during drying, affecting the product quality, and if the drying is classified, it will greatly increase the purchase and construction cost of the equipment and increase the energy consumption. UTILITY MODEL CONTENT

[0004] The utility model provides a kind of paper production equipment to solve at least one of the above technical problems.

[0005] The technical scheme adopted by the utility model is as follows:

[0006] A kind of paper production equipment, including drying box body, the drying box body is fixedly connected with two partitions, two the partitions are spaced apart along the length direction of drying box body to be divided into primary drying cabin, secondary drying cabin and tertiary drying cabin in sequence in drying box body interior, the secondary drying cabin is equipped with drying assembly and suction mechanism, the primary drying cabin, tertiary drying cabin is equipped with first exhaust mechanism, second exhaust mechanism respectively, the output of suction mechanism is communicated with the input of first exhaust mechanism, second exhaust mechanism respectively.

[0007] As preferred, the primary drying cabin is provided with a conveyor belt assembly, the first exhaust mechanism includes a first fairing, and the exhaust end of the first fairing is opposite to the upper surface of the conveyor belt assembly. The primary drying cabin is provided with a first air duct communicating with the first fairing.

[0008] As preferred, the drying assembly comprises a heating plate arranged in parallel with the paper tape conveying direction, the air suction mechanism comprises a second flow guide cover, the opening end of the second flow guide cover is opposite to the heating plate, the second air guide pipe communicating with the second flow guide cover is arranged on the upper end of the second drying cabin, the second air guide pipe is internally provided with a negative pressure fan blade, the second air guide pipe is provided with a driving motor for driving the negative pressure fan blade to rotate, and the first connecting pipe is connected between the second air guide pipe and the first air guide pipe.

[0009] As preferred, the second air suction mechanism comprises a third flow guide cover, the air exhaust end of the third flow guide cover is opposite to the paper tape surface, the third air guide pipe communicating with the third flow guide cover is arranged on the upper end of the third drying cabin, and the second connecting pipe is connected between the third air guide pipe and the second air guide pipe.

[0010] As preferred, the first drying cabin is internally provided with a first conveying roller group, the first conveying roller group is located at the end of the conveying direction of the conveying belt assembly and is used for receiving the paper tape conveyed out by the conveying belt assembly, the conveying gap for the paper tape to pass through is arranged on the partition plate between the first drying cabin and the second drying cabin, and the receiving roller group for receiving the paper tape conveyed out by the first conveying roller group is arranged in the second drying cabin.

[0011] As preferred, the second drying cabin is internally provided with two groups of reversing rollers, the two reversing rollers are diagonally distributed, and the paper tape passes through the two reversing rollers in sequence so that the conveying path of the paper tape is in an S shape.

[0012] As preferred, the second drying cabin is provided with a first pressure roller group, and the first pressure roller group is located at the end of the conveying direction of the reversing roller.

[0013] As preferred, the partition plate between the second drying cabin and the third drying cabin is provided with a paper tape conveying gap, and the traction roller group for receiving the paper tape is arranged on the two sides of the paper tape conveying gap.

[0014] As preferred, the third drying cabin is provided with an embossing roller group and a second pressure roller group, the embossing roller group and the second pressure roller group are diagonally distributed, the third drying cabin is provided with a paper tape outlet on the side wall, and the paper tape guide roller group corresponding to the paper tape outlet is arranged in the third drying cabin.

[0015] As preferred, the side wall of the drying box body is provided with a first box door and a second box door, the first box door corresponds to the position of the partition plate between the first drying cabin and the second drying cabin, and the second box door corresponds to the position of the partition plate between the second drying cabin and the third drying cabin.

[0016] Thanks to the above technical scheme, the present application has the following beneficial effects:

[0017] 1. In this application, by setting the first, second and third drying cabins, the drying box can be divided into multiple temperature zones along the conveying direction of the paper web, gradually increasing the temperature for drying, avoiding stress deformation of the paper due to sudden heating. It is worth mentioning that the residual heat in the second drying cabin can be recycled by the first and third drying cabins, forming a temperature gradient and improving the yield of the finished paper.

[0018] During the process of the wet paper web passing through the first drying cabin, the temperature in the cabin is controlled at 80-90℃, which can effectively evaporate the free water on the surface of the wet paper web; the temperature in the second drying cabin is increased to 100-110℃, and the paper web entering the second drying cabin is evaporated to remove the bound water inside the fibers. The temperature in the third drying cabin is reduced to 90-95℃, and the paper web entering the third drying cabin can quickly stabilize the paper structure at this temperature, effectively reducing the cracking rate of the paper web, and thus increasing the yield of the finished product.

[0019] 2. The conveying belt assembly is used to convey the wet paper web that has not been dried and shaped. The hot gas in the second drying cabin carries the water vapor evaporated in the second drying cabin from the first air guide pipe and the first flow guide cover and blows onto the wet paper web laid on the upper surface of the conveying belt assembly, evaporating the moisture on the surface of the wet paper web and making the paper web have a certain strength. The hot gas discharged from the second drying cabin has a certain humidity, which can avoid the cracking of the outermost layer of the paper web caused by the excessive drying of the outermost layer of the paper web due to the rapid evaporation of the moisture on the surface of the wet paper web in the first drying cabin.

[0020] 3. The heating plate is parallel to the conveying direction of the paper web, which can make the paper web fully absorb the heat of the heating plate and ensure the drying efficiency. Starting the driving motor to rotate the negative pressure fan blade to extract the hot gas in the second drying cabin along the second flow guide cover and the second air guide pipe, and discharging it into the first and second drying cabins for recycling, which is energy-saving and environmentally friendly.

[0021] The hot gas discharged from the second air guide pipe enters the third drying cabin through the third air guide pipe and the third flow guide cover and blows onto the surface of the paper web, drying the paper web.

[0022] 4. The first conveying roller group absorbs the end of the paper web transported by the conveying belt assembly and transfers the paper web along the conveying gap to the second drying cabin. After the end of the paper web enters the second drying cabin, the receiving roller group clamps the paper web and continues to convey it forward. The paper web passes through the receiving roller group and is conveyed to the reversing roller on the upper left, and then passes through the reversing roller on the upper left and the reversing roller on the lower right to form an S-shaped conveying path, increasing the drying time of the paper web in the second drying cabin and improving the drying effect. The first pressure roller group can press the paper web that is about to be dried, eliminating the protruding burrs on the surface of the paper web and increasing the flatness and smoothness of the paper web surface.

[0023] 5. The paper tape converted by the secondary drying cabin enters the tertiary drying cabin from the conveying gap under the action of the traction roller group, and the last step of drying processing is carried out. While the paper tape enters the tertiary drying cabin for drying, the embossing roller group performs embossing processing on the paper surface to increase the aesthetic degree of the paper surface. Subsequently, the second pressure roller group performs flattening on the paper surface again to eliminate burrs and edges generated by embossing. Finally, the lead-out roller group leads out the paper tape along the paper tape outlet, and the embossing roller group and the second pressure roller group are diagonally arranged to increase the contact area of hot air and the paper tape directly, thereby ensuring the drying effect.

[0024] 6. The first box door and the second box door are arranged to facilitate adjustment and deviation correction of the paper tape, thereby ensuring the stability of the conveying posture of the paper tape and the yield of the paper tape. BRIEF DESCRIPTION OF DRAWINGS

[0025] Fig. 1 is a structural schematic view of the specific embodiment of the present application;

[0026] Fig. 2 is a perspective view of the specific embodiment of the present application.

[0027] The drawings described herein are used to provide a further understanding of the present application, and form a part of the present application. The illustrative embodiments of the present application and the description thereof are used to explain the present application, and do not constitute an improper limitation on the present application.

[0028] In the drawings:

[0029] 1, drying box body; 11, partition; 2, primary drying cabin; 21, conveying belt assembly; 22, first conveying roller group; 23, first flow guide cover; 231, first air guide pipe; 232, first connecting pipe; 24, first box door; 3, secondary drying cabin; 31, receiving roller group; 32, reversing roller; 33, heating plate; 34, first pressure roller group; 35, second flow guide cover; 351, second air guide pipe; 352, driving motor; 353, negative pressure fan blade; 36, traction roller group; 4, tertiary drying cabin; 41, embossing roller group; 42, second pressure roller group; 43, third flow guide cover; 431, third air guide pipe; 432, second connecting pipe; 44, lead-out roller group; 45, second box door. DETAILED DESCRIPTION

[0030] In order to more clearly illustrate the overall concept of the present application, the following will be described in detail in an exemplary manner with reference to the drawings.

[0031] In the following description, many specific details are set forth in order to provide a thorough understanding of the present application, but the present application can also be implemented in other ways different from those described herein, therefore, the protection scope of the present application is not limited by the specific embodiments disclosed below.

[0032] In addition, in the description of the utility model, it needs to be understood that the orientation or positional relationship indicated by the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as a limitation on the utility model.

[0033] In the utility model, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting", "fixing" and the like should be understood in a broad sense, for example, can be fixed connection, or can be detachable connection, or can be integrated; can be mechanical connection, or can be electrical connection, or can be communication; can be directly connected, or can be indirectly connected through an intermediate medium, or can be the communication or interaction relationship between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0034] In the utility model, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. In the description of the specification, the description of the reference terms "embodiment", "example", "an embodiment", "example" or "specific example" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0035] Referring to Figs. 1-2 A paper production equipment, including drying box body 1, drying box body 1 is fixedly connected with two partitions 11, two partitions 11 are spaced apart along the length direction of drying box body 1 to divide the inside of drying box body 1 into first drying cabin 2, second drying cabin 3 and third drying cabin 4 in turn, second drying cabin 3 is equipped with drying assembly and suction mechanism, first exhaust mechanism, second exhaust mechanism are respectively arranged in first drying cabin 2, third drying cabin 4, and the output end of suction mechanism is communicated with the input end of first exhaust mechanism and second exhaust mechanism.

[0036] The skilled in the art can understand that the wet paper web shaped by the pressing process passes through the first drying cabin 2, the second drying cabin 3 and the third drying cabin 4 in turn, and the physical properties of the paper web dried by stages are greatly improved. In the drying process, by controlling the humidity and temperature gradient of the first drying cabin 2, the second drying cabin 3 and the third drying cabin 4, stress cracks caused by rapid water loss of the paper are avoided, and the waste rate is reduced. Specifically, before the wet paper web enters the drying box body 1, the staff first needs to start the drying assembly and adjust the output temperature of the drying assembly to 100-110°C, so that the temperature in the second drying cabin 3 is increased by more than 100°C. At the same time, the hot gas in the second drying cabin 3 is introduced into the first drying cabin 2 and the third drying cabin 4 along the first exhaust mechanism and the second exhaust mechanism respectively, so that the temperature in the first drying cabin 2 is increased to 80-90°C, and the temperature in the third drying cabin 4 is increased to 90-95°C. It should be noted that the skilled in the art can understand that the first exhaust mechanism and the second exhaust mechanism include control valves for controlling the flow of gas, and the hot gas entering the first drying cabin 2 and the third drying cabin 4 is controlled by the opening degree of the control valve, thereby realizing the control of the temperature in the two cabins. The structure is simple, the cost is low, and the operation is simple. Through the setting of the first drying cabin 2, the second drying cabin 3 and the third drying cabin 4, the drying box body 1 can be divided into multiple temperature zones along the conveying direction of the paper web, and the temperature is gradually increased for drying, thereby avoiding stress deformation of the paper due to sudden heating. It is worth mentioning that the residual heat in the second drying cabin 3 can be recycled by the first drying cabin 2 and the third drying cabin 4, and at the same time a temperature gradient is formed to improve the yield of the finished paper.

[0037] During the process of the wet paper web passing through the first drying cabin 2, the temperature in the first drying cabin 2 is controlled at 80-90°C, which can effectively evaporate the free water on the surface of the wet paper web; the temperature in the second drying cabin 3 is increased to 100-110°C, and the paper web entering the second drying cabin 3 is evaporated to remove the combined water in the fibers. The temperature of the third drying cabin 4 is reduced to 90-95°C, and the paper web entering the third drying cabin 4 can quickly and stably structure the paper at this temperature, effectively reducing the cracking rate of the paper web, thereby increasing the yield of the finished product.

[0038] As a specific embodiment of the first drying cabin 2 in the present application, refer to Fig. 1The first-stage drying cabin 2 is provided with a conveying belt assembly 21, and the first-stage drying cabin 2 is provided with a first air guide pipe 231 connected to the first air guide cover 23. The conveying belt assembly 21 is used for conveying the wet paper web which has not been dried and shaped. The water vapor evaporated from the wet paper web in the second-stage drying cabin 3 is discharged from the first air guide pipe 231 and the first air guide cover 23 and blown to the wet paper web laid on the upper surface of the conveying belt assembly 21, so as to evaporate the water on the surface of the wet paper web and make the paper web have a certain strength. The hot air discharged from the second-stage drying cabin 3 has a certain humidity, which can avoid the cracking of the paper web caused by the over-drying of the outermost layer of the paper web due to the too fast evaporation of the water on the surface of the wet paper web in the first-stage drying cabin 2.

[0039] As a specific embodiment of the drying assembly and the air exhaust mechanism, referring to Fig. 1 and Fig. 2 , the drying assembly comprises a heating plate 33 arranged in parallel with the conveying direction of the paper web, and the air exhaust mechanism comprises a second air guide cover 35, the opening end of the second air guide cover 35 is opposite to the heating plate 33, and the second-stage drying cabin 3 is provided with a second air guide pipe 351 connected to the second air guide cover 35, the second air guide pipe 351 is provided with a negative pressure fan blade 353, the second air guide pipe 351 is provided with a driving motor 352 used for driving the negative pressure fan blade 353 to rotate, and the first connecting pipe 232 is connected between the second air guide pipe 351 and the first air guide pipe 231.

[0040] The heating plate 33 is a plate heater. Compared with the traditional drying cylinder heating drying mode, the plate heater cancels the configuration of a servo motor, so that the drying process is more energy-saving and efficient, and the plate heater adopts electric heating, which has the advantages of fast heating and constant temperature. The heating plate 33 is parallel to the conveying direction of the paper web, which can make the paper web fully absorb the heat of the heating plate 33 and ensure the drying efficiency. The driving motor 352 is started to drive the negative pressure fan blade 353 to rotate, so that the hot air in the second-stage drying cabin 3 is exhausted along the second air guide cover 35 and the second air guide pipe 351, and is discharged into the first-stage drying cabin 2 and the second-stage drying cabin 3 for recycling, which is energy-saving and environmentally friendly.

[0041] As a specific embodiment of the second air exhaust mechanism in the present application, referring to Figs. 1-2 , the second air exhaust mechanism comprises a third air guide cover 43, the air exhaust end of the third air guide cover 43 is opposite to the surface of the paper web, the third-stage drying cabin 4 is provided with a third air guide pipe 431 connected to the third air guide cover 43, and the second connecting pipe 432 is connected between the third air guide pipe 431 and the second air guide pipe 351. The hot air discharged from the second air guide pipe 351 enters the third-stage drying cabin 4 through the third air guide pipe 431 and the third air guide cover 43 and is blown to the surface of the paper web, so as to dry the paper web.

[0042] As a preferred embodiment of the present application, refer to Fig. 1 The first conveying roller group 22 is arranged in the first drying cabin 2 and located at the end of the conveying direction of the conveying belt assembly 21 to receive the paper strip conveyed by the end of the conveying belt assembly 21. The partition plate 11 between the first drying cabin 2 and the second drying cabin 3 is provided with a conveying gap for the paper strip to pass through. The second drying cabin 3 is provided with a receiving roller group 31 to receive the paper strip conveyed by the first conveying roller group 22.

[0043] Further, the second drying cabin 3 is provided with two groups of reversing rollers 32, which are diagonally distributed. The paper strip passes through the two groups of reversing rollers 32 in sequence to form an S-shaped conveying path, thereby increasing the drying time of the paper strip in the second drying cabin 3 and improving the drying effect.

[0044] Further, the second drying cabin 3 is provided with a first pressure roller group 34 located at the end of the conveying direction of the reversing rollers 32. The first pressure roller group 34 can press the paper strip to be dried to eliminate the burrs on the surface of the paper and increase the flatness and smoothness of the paper strip.

[0045] As a preferred example of the present application, refer to Fig. 1 The partition plate 11 between the second drying cabin 3 and the third drying cabin 4 is provided with a paper strip conveying gap, and the two sides of the paper strip conveying gap are provided with a traction roller group 36 to receive the paper strip. The paper strip conveyed by the second drying cabin 3 enters the third drying cabin 4 through the traction roller group 36 to perform the last step of drying processing.

[0046] Specifically, the third drying cabin 4 is provided with an embossing roller group 41 and a second pressure roller group 42, which are diagonally distributed. The third drying cabin 4 is provided with a paper strip outlet on the side wall and a paper strip guide roller group 44 in the third drying cabin 4 corresponding to the paper strip outlet. When the paper strip enters the third drying cabin 4 for drying, the embossing roller group 41 performs embossing processing on the paper surface to increase the aesthetic degree of the paper surface. Subsequently, the second pressure roller group 42 flattens the paper surface again to eliminate the burrs generated by embossing. Finally, the guide roller group 44 guides the paper strip out of the paper strip outlet. The diagonal arrangement of the embossing roller group 41 and the second pressure roller group 42 can increase the contact area between the hot air and the paper strip to ensure the drying effect.

[0047] As a preferred embodiment of the present application, refer to Fig. 2 The side wall of the drying box body 1 is provided with a first box door 24 and a second box door 45, the first box door 24 corresponds to the position of the partition plate 11 between the first-stage drying cabin 2 and the second-stage drying cabin 3, and the second box door 45 corresponds to the position of the partition plate 11 between the second-stage drying cabin 3 and the third-stage drying cabin 4. The setting of the first box door 24 and the second box door 45 can facilitate the adjustment and deviation correction of the paper tape, ensure the stability of the paper tape conveying posture, and further ensure the yield of the paper tape.

[0048] The parts not described in the utility model can be realized by using or referring to the existing technology.

[0049] Each of the embodiments in the specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment mainly describes the difference from other embodiments.

[0050] The above is only an embodiment of the utility model, and is not used to limit the utility model. For those skilled in the art, the utility model can have various changes and changes. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the utility model should be included in the claim range of the utility model.

Claims

1. A paper production apparatus, comprising a drying chamber (1), characterized in that, The drying chamber (1) is fixedly connected to two partitions (11). The two partitions (11) are spaced apart along the length of the drying chamber (1) to divide the interior of the drying chamber (1) into a primary drying chamber (2), a secondary drying chamber (3), and a tertiary drying chamber (4). The secondary drying chamber (3) is equipped with a drying assembly and an exhaust mechanism. The primary drying chamber (2) and the tertiary drying chamber (4) are respectively equipped with a first exhaust mechanism and a second exhaust mechanism. The output end of the exhaust mechanism is connected to the input end of the first exhaust mechanism and the second exhaust mechanism, respectively.

2. The paper production equipment according to claim 1, characterized in that, The primary drying chamber (2) is provided with a conveyor belt assembly (21), and the first exhaust mechanism includes a first air guide shroud (23). The exhaust end of the first air guide shroud (23) faces the upper surface of the conveyor belt assembly (21), and the primary drying chamber (2) is provided with a first air guide pipe (231) that connects to the first air guide shroud (23).

3. The paper production equipment according to claim 2, characterized in that, The drying assembly includes a heating plate (33) which is arranged parallel to the paper tape conveying direction. The air extraction mechanism includes a second air guide hood (35) with the opening end of the second air guide hood (35) facing the heating plate (33). The upper end of the secondary drying chamber (3) is provided with a second air guide pipe (351) that connects to the second air guide hood (35). The second air guide pipe (351) is provided with a negative pressure fan blade (353). The second air guide pipe (351) is provided with a drive motor (352) for driving the negative pressure fan blade (353) to rotate. A first connecting pipe (232) connects the second air guide pipe (351) and the first air guide pipe (231).

4. The paper production equipment according to claim 3, characterized in that, The second exhaust mechanism includes a third air guide (43), the exhaust end of which faces the paper tape surface. The three-stage drying chamber (4) is provided with a third air guide pipe (431) that connects to the third air guide (43), and a second connecting pipe (432) connects the third air guide pipe (431) and the second air guide pipe (351).

5. A paper production apparatus according to any one of claims 1-4, characterized in that, The first-stage drying chamber (2) is provided with a first conveyor roller group (22), which is located at the end of the conveyor belt assembly (21) in the conveying direction and is used to receive the paper tape from the end of the conveyor belt assembly (21). The partition (11) between the first-stage drying chamber (2) and the second-stage drying chamber (3) is provided with a conveying gap for the paper tape to pass through. The second-stage drying chamber (3) is provided with a receiving roller group (31) for receiving the paper tape from the first conveyor roller group (22).

6. The paper production equipment according to claim 5, characterized in that, The secondary drying chamber (3) is equipped with two sets of reversing rollers (32). The two reversing rollers (32) are diagonally distributed, and the paper tape passes through the two reversing rollers (32) in sequence so that the paper tape conveying path is S-shaped.

7. The paper production equipment according to claim 6, characterized in that, The secondary drying chamber (3) is equipped with a first pressure roller group (34), which is located at the end of the conveying direction of the reversing roller (32).

8. The paper production equipment according to claim 1, characterized in that, A paper tape conveying gap is provided on the partition (11) between the secondary drying chamber (3) and the tertiary drying chamber (4), and traction roller groups (36) for receiving the paper tape are provided on both sides of the paper tape conveying gap.

9. A paper production equipment according to claim 8, characterized in that, The three-stage drying chamber (4) is equipped with an embossing roller group (41) and a second pressure roller group (42). The embossing roller group (41) and the second pressure roller group (42) are diagonally distributed. The side wall of the three-stage drying chamber (4) is provided with a paper tape outlet. The three-stage drying chamber (4) is equipped with a paper tape guide roller group (44), which corresponds to the paper tape outlet.

10. A paper production apparatus according to claim 1, characterized in that, The drying chamber (1) has a first door (24) and a second door (45) on its side wall. The first door (24) corresponds to the position of the partition (11) between the first drying chamber (2) and the second drying chamber (3). The second door (45) corresponds to the position of the partition (11) between the second drying chamber (3) and the third drying chamber (4).

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