Efficient energy-saving kraft paper composite film drying and cooling equipment

Abstract

The utility model relates to kraft paper processing technical field especially relates to a kind of high-efficiency energy-saving kraft paper composite film drying cooling equipment, including rack and fixed installation in the drying cabinet of rack inside, drying cabinet inside fixed installation has partition, partition separates the drying cabinet inside into high-temperature chamber and low-temperature chamber two independent spaces, the upper end of drying cabinet is fixedly installed with suction fan, the input end of suction fan is through with high-temperature chamber, the side wall of partition in low-temperature chamber is fixedly installed with first diffuser, first diffuser is through with the output end of suction fan and is connected, and the subsequent work station of the side of drying cabinet is provided with cooling mechanism;The utility model extracts high-heat air from high-temperature chamber by suction fan, preliminary cooling after heat exchange in transmission process, then is transported to low-temperature chamber by first diffuser, both dry waste heat recovery reduces energy consumption, and the thermal shock to material is reduced by temperature gradient control, and the quality of finished product is improved.

Description

Technical Field

[0001] This utility model relates to the field of kraft paper processing technology, and in particular to a high-efficiency and energy-saving kraft paper composite film drying and cooling equipment. Background Technology

[0002] Kraft paper composite film is a high-performance packaging material made of kraft paper as the base material and endowed with special functions such as moisture resistance, water resistance, and reinforcement through a composite process. It is widely used in the heavy packaging process in the fields of chemical, food, and building materials. In its production process, it needs to be dried and cooled after lamination and finally rolled up to make finished rolls.

[0003] Currently, the drying equipment commonly used in the industry is the hot air circulating oven. Its principle is to heat the air and use convection heat transfer to evaporate the moisture in the film layer. Then, the material is discharged from the oven and comes into contact with the cooling roller for cooling. However, when the high-temperature material leaves the oven and enters the room temperature environment directly, the drastic temperature difference will cause the material surface to condense rapidly, and may even cause curling and edge warping, affecting the quality of the finished product.

[0004] Therefore, to address the aforementioned issues, a high-efficiency and energy-saving kraft paper composite film drying and cooling equipment can be designed. A buffer cooling zone can be integrated into the subsequent drying station, introducing the hot air discharged from the drying zone into the buffer zone to form a gradient cooling environment. This allows the material to gradually release surface heat, avoiding condensation and curling caused by direct contact with room temperature air. Subsequently, the material is cooled again by a cooling roller group. This not only recovers the waste heat from drying and reduces energy consumption, but also reduces the thermal shock to the material through temperature gradient control, effectively ensuring the quality of the finished roll material. Utility Model Content

[0005] In order to overcome the problem that traditional drying equipment directly puts the material into the cooling roller group in a normal temperature environment after drying, the drastic temperature difference will cause the material surface to condense rapidly, and even curl and warp, affecting the quality of the finished product.

[0006] The technical solution of this utility model is as follows: a high-efficiency and energy-saving kraft paper composite film drying and cooling equipment, including a frame and a drying chamber fixedly installed inside the frame, and a partition wall fixedly installed inside the drying chamber. The partition wall divides the interior of the drying chamber into two independent spaces: a high-temperature chamber and a low-temperature chamber. An exhaust fan is fixedly installed at the upper end of the drying chamber, and the input end of the exhaust fan is connected to the high-temperature chamber. A first diffuser is fixedly installed on the side wall of the partition wall in the low-temperature chamber, and the first diffuser is connected to the output end of the exhaust fan. A cooling mechanism is provided at the subsequent station on one side of the drying chamber.

[0007] Preferably, when the material is dried in the drying chamber, it first passes through a high-temperature chamber for efficient drying, then through a low-temperature chamber for buffer cooling, and finally exits the drying chamber and is introduced into a cooling mechanism for cooling. Then it is rolled up into a finished product. The exhaust fan can draw hot air from the high-temperature chamber, which is initially cooled through heat exchange during the transmission process, and then transported to the low-temperature chamber through the first diffuser. This not only recovers the drying waste heat and reduces energy consumption, but also reduces the thermal shock to the material through temperature gradient control, thereby improving the quality of the finished product.

[0008] Preferably, the upper end of the drying chamber is provided with an air supply mechanism, which includes a hot air fan fixedly installed at the upper end of the drying chamber and a second diffuser fixedly installed on the inner wall of the drying chamber. The second diffuser is located inside the high-temperature chamber, and the output end of the hot air fan is connected to the second diffuser.

[0009] Preferably, an inspection cover is detachably mounted on one side of the drying oven via fasteners.

[0010] Preferably, the cooling mechanism includes a first cooling roller disposed inside the frame, two sets of second cooling rollers disposed on both sides of the first cooling roller, the second cooling rollers being slidably connected to the frame, and a set of adjusting cylinders being fixedly installed on both sides of the frame, with the extension and retraction ends of each set of adjusting cylinders being fixedly connected to the corresponding second cooling roller.

[0011] Preferably, the two sets of second cooling rollers are arranged at different heights and alternately with the first cooling rollers.

[0012] Preferably, an inlet roller is installed inside the frame, located on one side of the drying chamber.

[0013] Preferably, the drying oven is equipped with several guide rollers, which are arranged at different heights inside the drying oven.

[0014] The beneficial effects of this utility model are:

[0015] 1. Hot air is drawn from the high-temperature chamber by an exhaust fan, and after initial cooling through heat exchange during the transmission process, it is then transported to the low-temperature chamber through the first diffuser. During operation, the material first undergoes efficient drying in the high-temperature chamber, then passes through the low-temperature chamber for buffer cooling, and finally exits the drying chamber and is introduced into the cooling mechanism for further cooling before being rolled up into a finished product. This process not only recovers the drying waste heat and reduces energy consumption, but also reduces the thermal shock to the material through temperature gradient control, thereby improving the quality of the finished product.

[0016] 2. By using guide rollers arranged in a staggered pattern to form a three-dimensional material guiding path within the drying chamber, the effective drying and buffer cooling time of the film material is extended, enhancing drying uniformity and preventing the film material from shifting or wrinkling during transport, thus ensuring production quality. Attached Figure Description

[0017] Figure 1 The diagram shown is a first three-dimensional structural schematic of the high-efficiency and energy-saving kraft paper composite film drying and cooling equipment of this utility model.

[0018] Figure 2 The diagram shown is a second three-dimensional structural schematic of the high-efficiency and energy-saving kraft paper composite film drying and cooling equipment of this utility model.

[0019] Figure 3 The diagram shown is a three-dimensional cross-sectional view of the drying chamber of the high-efficiency and energy-saving kraft paper composite film drying and cooling equipment of this utility model.

[0020] Figure 4 The diagram shown is a plan view of the material conveying path of the high-efficiency and energy-saving kraft paper composite film drying and cooling equipment of this utility model.

[0021] Explanation of reference numerals in the attached drawings: 1. Frame; 2. Drying oven; 201. Partition wall; 202. High-temperature chamber; 203. Low-temperature chamber; 204. Inspection cover; 3. Exhaust fan; 301. First diffuser; 401. Hot air fan; 402. Second diffuser; 501. First cooling roller; 502. Second cooling roller; 503. Adjusting cylinder; 6. Inlet roller; 7. Guide roller. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0023] Please see Figure 1 , Figure 3 and Figure 4This utility model provides an embodiment: a high-efficiency and energy-saving kraft paper composite film drying and cooling device, including a frame 1 and a drying chamber 2 fixedly installed inside the frame 1, and a partition wall 201 fixedly installed inside the drying chamber 2. The partition wall 201 divides the interior of the drying chamber 2 into two independent spaces: a high-temperature chamber 202 and a low-temperature chamber 203. An exhaust fan 3 is fixedly installed at the upper end of the drying chamber 2, and the input end of the exhaust fan 3 is in communication with the high-temperature chamber 202. A first diffuser 301 is fixedly installed on the side wall of the partition wall 201 in the low-temperature chamber 203, and the first diffuser 301 is in communication with the output end of the exhaust fan 3. The drying chamber 2 is connected to a cooling mechanism at one of its downstream stations. When the material is dried in the drying chamber 2, it first passes through the high-temperature chamber 202 for efficient drying, then through the low-temperature chamber 203 for buffer cooling, and finally exits the drying chamber 2 and is introduced into the cooling mechanism for further cooling. The material is then wound up into a finished product. The exhaust fan 3 can draw hot air from the high-temperature chamber 202, which is initially cooled through heat exchange during the transmission process. Then, it is transported to the low-temperature chamber 203 through the first diffuser 301. This process not only recovers the waste heat from drying and reduces energy consumption, but also reduces the thermal shock to the material through temperature gradient control, thereby improving the quality of the finished product.

[0024] Please see Figure 1 , Figure 2 and Figure 3 In this embodiment, an air supply mechanism is provided at the upper end of the drying chamber 2. The air supply mechanism includes a hot air blower 401 fixedly installed at the upper end of the drying chamber 2 and a second diffuser 402 fixedly installed on the inner wall of the drying chamber 2. The second diffuser 402 is located inside the high-temperature chamber 202, and the output end of the hot air blower 401 is connected to the second diffuser 402. Hot air is delivered inside the high-temperature chamber 202 by the hot air blower 401 and the second diffuser 402 to dry the material passing through. A maintenance cover 204 is detachably installed on one side of the drying chamber 2 by fasteners. The disassembled inspection cover 204 facilitates subsequent maintenance and repair work inside the drying chamber 2; the frame 1 is equipped with an inlet roller 6, which is located on one side of the drying chamber 2; the inlet roller 6 stably introduces the material from the production line into the drying chamber 2; the drying chamber 2 is equipped with several guide rollers 7, which are arranged in a staggered manner inside the drying chamber 2; the staggered arrangement of the guide rollers 7 in the drying chamber 2 forms a three-dimensional material guiding path, which prolongs the effective drying and buffer cooling time of the film material in the drying chamber 2 and enhances the drying uniformity.

[0025] Please see Figure 3 and Figure 4In this embodiment, the cooling mechanism includes a first cooling roller 501 disposed inside the frame 1, and two sets of second cooling rollers 502 disposed on both sides of the first cooling roller 501. The second cooling rollers 502 are slidably connected to the frame 1. A set of adjusting cylinders 503 are fixedly installed on both sides of the frame 1, and the extension end of each set of adjusting cylinders 503 is fixedly connected to the corresponding second cooling roller 502. The two sets of second cooling rollers 502 and the first cooling roller 501 are arranged at different heights. The distance between the first cooling roller 501 and the second cooling roller 502 can be adjusted by the adjusting cylinders 503 to accommodate materials of different thicknesses, so that the material passing through the first cooling roller 501 and the second cooling roller 502 can be in close contact with and squeezed, thereby efficiently cooling both sides of the material and further preventing it from curling up.

[0026] During operation, the material in the production line is smoothly introduced into the drying chamber 2 by the inlet roller 6, and then stably transported by several guide rollers 7 arranged in a staggered manner.

[0027] The introduced material first passes through the high-temperature chamber 202 for efficient drying, then passes through the low-temperature chamber 203 for buffer cooling, and finally exits the drying chamber 2 for final cooling by passing through the outer periphery of the first cooling roller 501 and the second cooling roller 502.

[0028] Hot air is delivered to the high-temperature chamber 202 by a hot air blower 401 in conjunction with a second diffuser 402 to dry the material. The exhaust fan 3 can draw hot air from the high-temperature chamber 202, which is initially cooled by heat exchange during the transmission process. Then it is delivered to the low-temperature chamber 203 through the first diffuser 301. This not only recovers the drying waste heat and reduces energy consumption, but also reduces the thermal shock to the material through temperature gradient control, thereby improving the quality of the finished product.

[0029] The distance between the first cooling roller 501 and the second cooling roller 502 can be adjusted by the adjusting cylinder 503 to accommodate materials of different thicknesses. This allows the material passing through the first cooling roller 501 and the second cooling roller 502 to come into close contact with and be squeezed, thereby efficiently cooling both sides of the material and further preventing it from curling up.

[0030] Through the above steps, hot air is drawn from the high-temperature chamber 202 by the exhaust fan 3, and after initial cooling through heat exchange during the transmission process, it is then transported to the low-temperature chamber 203 through the first diffuser 301. This not only recovers the drying waste heat and reduces energy consumption, but also reduces the thermal shock to the material through temperature gradient control, thereby improving the quality of the finished product. This solves the problem that in traditional drying equipment, when the material is directly placed into the cooling roller group in a normal temperature environment after drying, the drastic temperature difference will cause the material surface to condense rapidly, or even curl and warp, affecting the quality of the finished product.

[0031] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A high-efficiency and energy-saving drying and cooling device for kraft paper composite film, comprising a frame (1) and a drying chamber (2) fixedly installed inside the frame (1), characterized in that: It also includes a partition wall (201) fixedly installed inside the drying chamber (2). The partition wall (201) divides the interior of the drying chamber (2) into two independent spaces: a high-temperature chamber (202) and a low-temperature chamber (203). An exhaust fan (3) is fixedly installed at the upper end of the drying chamber (2). The input end of the exhaust fan (3) is connected to the high-temperature chamber (202). A first diffuser (301) is fixedly installed on the side wall of the partition wall (201) in the low-temperature chamber (203). The first diffuser (301) is connected to the output end of the exhaust fan (3). A cooling mechanism is provided at the subsequent work station on one side of the drying chamber (2).

2. The high-efficiency and energy-saving kraft paper composite film drying and cooling equipment according to claim 1, characterized in that: The air supply mechanism includes a hot air blower (401) fixedly installed on the upper end of the drying box (2) and a second diffuser (402) fixedly installed on the inner wall of the drying box (2). The second diffuser (402) is located inside the high temperature chamber (202), and the output end of the hot air blower (401) is connected to the second diffuser (402).

3. The high-efficiency and energy-saving kraft paper composite film drying and cooling equipment according to claim 1, characterized in that: A maintenance cover (204) is detachably mounted on one side of the drying oven (2) by means of fasteners.

4. The high-efficiency and energy-saving kraft paper composite film drying and cooling equipment according to claim 1, characterized in that: The cooling mechanism includes a first cooling roller (501) disposed inside the frame (1), two sets of second cooling rollers (502) disposed on both sides of the first cooling roller (501), the second cooling rollers (502) being slidably connected to the frame (1), and a set of adjusting cylinders (503) being fixedly installed on both sides of the frame (1), the extension and retraction ends of each set of adjusting cylinders (503) being fixedly connected to the corresponding second cooling rollers (502).

5. The high-efficiency and energy-saving kraft paper composite film drying and cooling equipment according to claim 4, characterized in that: Two sets of second cooling rollers (502) are arranged at different heights and alternately with the first cooling roller (501).

6. The high-efficiency and energy-saving kraft paper composite film drying and cooling equipment according to claim 1, characterized in that: An inlet roller (6) is installed inside the frame (1), and the inlet roller (6) is located on one side of the drying box (2).

7. The high-efficiency and energy-saving kraft paper composite film drying and cooling equipment according to claim 1, characterized in that: The drying oven (2) is equipped with several guide rollers (7), which are arranged in a staggered pattern inside the drying oven (2).

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