Molded pulp drying device

Abstract

The utility model discloses a molded pulp drying device which comprises an upper air duct and a lower air duct, the bottom of the upper air duct is communicated with a radiator, radiating fins are arranged in the radiator, the bottom of the radiator is communicated with a drying box, the interior of the drying box is communicated with the lower air duct to form a drying channel, and a circulating fan is arranged at the output end of the lower air duct. The output end of the circulating fan is connected with a circulating air duct communicating with the upper air duct, the upper air duct, the radiator, the drying box, the lower air duct and the circulating air duct form a circulating loop, and the circulating air duct is provided with a dehumidification pipeline communicating with the external environment and comprises an upward ascending channel and a horizontal channel arranged horizontally. The horizontal channel is communicated with the upper air channel, an arc-shaped channel is arranged between the ascending channel and the horizontal channel, the arc-shaped channel is connected with an air inlet pipe communicated with the external environment, and the air inlet pipe is horizontally arranged. In the paper pulp drying process, external high-temperature air can be utilized, and the effect of reducing energy consumption is achieved.

Description

Technical Field

[0001] This utility model belongs to the field of pulp drying equipment, specifically relating to a pulp molding drying device. Background Technology

[0002] Pulp molding drying is a key process that determines product quality, energy consumption, and production efficiency. Currently, multi-layer heat-dissipating drying lines use radiators to heat air, which in turn heats the product. This evaporates the moisture in the product, thus drying it. High-temperature heat transfer oil flows through the radiator, causing the radiator fins to heat up. When the cooler, humid air flows through, it is heated, becoming high-temperature dry air with very low relative humidity. This high-temperature dry air passes through the drying chamber, drying the pulp. The high-temperature dry air gradually passes from the upper layer through the drying tunnel to the lower layer, where its humidity increases and its temperature decreases, becoming humid air again. However, this drying process generates additional high-temperature air when the heat transfer oil is introduced. This high-temperature air is generally directly discharged into the atmosphere, resulting in wasted energy. Moreover, reheating the low-temperature humid air consumes a lot of energy. Therefore, to avoid the shortcomings of the existing technology, it is necessary to improve it. Utility Model Content

[0003] The purpose of this invention is to provide a pulp molding and drying device that can utilize external high-temperature air during the pulp drying process to reduce energy consumption.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0005] A pulp molding drying device includes an upper air duct and a lower air duct. A radiator is connected to the bottom of the upper air duct, and heat dissipation fins are installed inside the radiator. A drying chamber is connected to the bottom of the radiator. The pulp to be dried is placed inside the drying chamber. The interior of the drying chamber is connected to the lower air duct to form a drying channel. A circulating fan is installed at the output end of the lower air duct. The output end of the circulating fan is connected to a circulating air duct connected to the upper air duct. The upper air duct, the radiator, the drying chamber, the lower air duct, and the circulating air duct form a circulating loop. A dehumidification pipe connected to the external environment is installed on the circulating air duct. The circulating air duct includes an upward-directed ascending channel and a horizontally arranged horizontal channel. The horizontal channel is connected to the upper air duct. An arc-shaped channel is provided between the ascending channel and the horizontal channel. An air inlet pipe connected to the arc-shaped channel is connected to the external environment. The air inlet pipe is horizontally arranged.

[0006] As a preferred embodiment of the above-mentioned pulp molding drying device, the dehumidification pipe is connected to the rising channel and is aligned with the air outlet of the circulating fan.

[0007] As a preferred embodiment of the above-mentioned pulp molding and drying device, the dehumidification pipe is connected to a bypass dehumidification pipe, which can be connected to a pulp molding machine.

[0008] As a preferred embodiment of the above-mentioned pulp molding and drying device, the radiator is provided with a heat transfer oil inlet and a heat transfer oil outlet that communicate with the interior of the heat sink.

[0009] As a preferred embodiment of the above-mentioned pulp molding drying device, the drying chamber is provided with a conveyor belt inside, and a tray for supporting pulp is provided on the conveyor belt. The conveyor belt extends to the outside of the drying chamber and is connected to a feeding device and a discharging device.

[0010] As a preferred embodiment of the above-mentioned pulp molding and drying device, the air inlet pipe is located near the horizontal channel in the arc-shaped channel, and the air inlet pipe is inserted into the horizontal channel from the arc-shaped channel.

[0011] The advantages of implementing the pulp molding and drying device provided by this utility model compared with the prior art are as follows:

[0012] This invention utilizes heat transfer oil to heat the fins within a radiator, thereby heating the air in the upper air duct. This heated air becomes high-temperature, dry air with very low humidity, which is then introduced into a drying chamber to dry the pulp. The remaining air, passing through the drying channel inside the chamber, becomes low-temperature, humidified air and enters the lower air duct. A circulating fan at the output of the lower air duct transports this low-temperature, humidified air back to the upper air duct for reheating, creating a cycle. The upper air duct, radiator, drying chamber, lower air duct, and circulating air duct form a loop. The circulating air duct is equipped with an exhaust pipe connected to the external environment, allowing some of the low-temperature, humidified air drawn from the lower air duct by the circulating fan to be discharged. An air inlet pipe connected to the arc-shaped channel of the circulating air duct allows the introduction of dry air from the external environment. Furthermore, because the drying process generates additional high-temperature air when the heat transfer oil is introduced, the dry air in the external environment is also more humid than the low-temperature air discharged through the exhaust pipe. The higher air temperature results in less energy consumption when heating this portion of external air. An arc-shaped channel connects the rising and horizontal channels. The circulating fan draws air into the rising channel of the circulating duct and blows it along the arc-shaped channel towards the horizontal channel. The airflow is faster in the arc-shaped channel and slower in the inlet duct. According to Bernoulli's principle, a negative pressure is created near the connection between the inlet duct and the arc-shaped channel. External air is thus drawn into the arc-shaped channel through the inlet duct and then along the horizontal channel into the upper duct for heating. The horizontal placement of the inlet duct in the arc-shaped channel prevents the rising channel from directly aligning with the inlet duct, which would otherwise allow air inside the duct to escape and prevent external air from entering. By venting low-temperature, humid air and introducing dry external air, and because the dry external air is warmer than the low-temperature, humid air discharged through the exhaust duct, less energy is consumed when heating this portion of external air. This achieves the effect of utilizing high-temperature external air and reducing energy consumption. Attached Figure Description

[0013] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings of the embodiments will be briefly described below.

[0014] Figure 1 This is a schematic diagram of the pulp molding and drying device of this utility model. Figure 1 ;

[0015] Figure 2 This is a schematic diagram of the pulp molding and drying device of this utility model. Figure 2 ;

[0016] Figure 3 yes Figure 2 A magnified view of a portion of the circulating air duct;

[0017] Figure 4This is a schematic diagram of the internal airflow direction of the pulp molding and drying device of this utility model.

[0018] Marked in the image:

[0019] 100. Upper air duct; 200. Radiator; 210. Heat transfer oil inlet; 220. Heat transfer oil outlet; 230. Heat sink; 300. Drying box; 310. Drying passage; 400. Lower air duct; 500. Circulating fan; 600. Circulating air duct; 610. Rising passage; 620. Arc-shaped passage; 630. Horizontal passage; 700. Air inlet pipe; 800. Exhaust pipe; 810. Bypass exhaust pipe; 900. Feeding device; 910. Unloading device; 920. Conveyor belt; 930. Pallet. Detailed Implementation

[0020] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0021] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0022] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0023] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0024] Please refer to the following: Figures 1 to 4 The pulp molding and drying apparatus provided in the embodiments of this utility model will now be described.

[0025] like Figures 1 to 4As shown, the pulp molding drying device of this utility model includes an upper air duct 100 and a lower air duct 400. A radiator 200 is connected to the bottom of the upper air duct 100, and heat dissipation fins 230 are installed inside the radiator 200. A drying chamber 300 is connected to the bottom of the radiator 200, and the pulp to be dried is placed inside the drying chamber 300. The interior of the drying chamber 300 is connected to the lower air duct 400 to form a drying channel 310. A circulating fan 500 is installed at the output end of the lower air duct 400, and the output end of the circulating fan 500 is connected to a circulating air duct 600 connected to the upper air duct 100. The duct 100, the radiator 200, the drying oven 300, the downdraft duct 400, and the circulating duct 600 form a circulating loop. The circulating duct 600 is provided with a dehumidification pipe 800 that communicates with the external environment. The circulating duct 600 includes an upward-directing ascending channel 610 and a horizontally arranged horizontal channel 630. The horizontal channel 630 communicates with the updraft duct 100. An arc-shaped channel 620 is provided between the ascending channel 610 and the horizontal channel 630. An air inlet pipe 700 that communicates with the external environment is connected to the arc-shaped channel 620. The air inlet pipe 700 is arranged horizontally.

[0026] The air inlet duct 700 is set horizontally so that the rising channel 610 is not aligned with the air inlet duct 700, thus preventing air from the circulating air duct 600 from being discharged through the air inlet duct 700 and causing the air inlet duct 700 to be unable to take in air.

[0027] For example, the dehumidification duct 800 is connected to the rising channel 610, and the dehumidification duct 800 is aligned with the air outlet of the circulating fan 500. The connection of the dehumidification duct 800 to the rising channel 610 and alignment with the air outlet of the circulating fan 500 allows more of the low-temperature, humid air drawn from the lower duct 400 to be discharged into the external environment, thereby enabling the introduction of more dry external air. This reduces the energy consumption when heating this external air, achieving the effect of energy reduction.

[0028] For example, the dehumidification pipe 800 is bypassed and connected to a bypass dehumidification pipe 810, which can be connected to a pulp molding machine. The bypass connection of the dehumidification pipe 800 to the bypass dehumidification pipe 810 facilitates the control of the ambient humidity of the pulp molding machine.

[0029] For example, the radiator 200 is provided with a heat transfer oil inlet 210 and a heat transfer oil outlet 220 that communicate with the interior of the heat transfer fins 230. The heat transfer fins 230 are composed of multiple rows of copper tubes. High-temperature heat transfer oil is injected through the heat transfer oil inlet 210 to heat the radiator 200, and the cooled heat transfer oil is discharged through the heat transfer oil outlet 220, making the filling and discharge of heat transfer oil more convenient.

[0030] For example, the drying chamber 300 is equipped with a conveyor belt 920 inside, and a tray 930 for supporting pulp is provided on the conveyor belt 920. The conveyor belt 920 extends to the outside of the drying chamber 300 and is connected to a feeding device 900 and a discharging device 910. The pulp enters the drying chamber 300 from the feeding device 900 outside the drying chamber 300 through the tray 930, and is moved, transported, and dried inside the drying chamber 300 by the conveyor belt 920. Finally, it is moved to the discharging device 910 outside the drying chamber 300 for unloading. The conveyor belt 920 inside the drying chamber 300 allows the pulp to stay in the drying chamber 300 for a longer time, ensuring drying quality.

[0031] For example, the air inlet duct 700 is positioned in the arc-shaped channel 620 near the horizontal channel 630, and the air inlet duct 700 is inserted horizontally from the arc-shaped channel 620 into the horizontal channel 630. The fact that a small section of the air inlet duct 700 is inserted horizontally into the horizontal channel 630 ensures that one end of the air inlet duct 700 at the junction with the circulating air duct 600 is horizontally aligned with the horizontal channel 630, thus better ensuring that air from the rising channel 610 is not discharged along the air inlet duct 700.

[0032] The advantages of implementing the pulp molding and drying device provided by this utility model compared with the prior art are as follows:

[0033] This invention uses heat transfer oil to heat the heat sink 230 inside the radiator 200, thereby heating the air inside the upper air duct 100. This heats the air in the upper air duct 100 into high-temperature, dry air with very low humidity, which is then introduced into the drying chamber 300. Inside the drying chamber 300, the pulp is dried. The air then passes through the drying channel 310 inside the drying chamber 300, becoming low-temperature, humid air, and enters the lower air duct 400. A circulating fan 500 is installed at the output end of the lower air duct 400, which transports the low-temperature, humid air from the lower air duct 400 back to the upper air duct 100 through the circulating air duct 600 for reheating and recirculation. The unit 100, radiator 200, drying oven 300, downdraft duct 400, and circulating air duct 600 form a loop. The circulating air duct 600 is equipped with an exhaust pipe 800 connected to the external environment, which can discharge a portion of the low-temperature, humid air drawn from the downdraft duct 400 by the circulating fan 500. The arc-shaped channel 620 of the circulating air duct 600 is connected to an air inlet pipe 700 connected to the external environment, allowing dry air from the external environment to enter. Furthermore, because additional high-temperature air is generated during the drying process when heat transfer oil is introduced, the dry air from the external environment will be more abundant than the air discharged through the exhaust pipe 800. The lower temperature of the humidified air is higher, thus requiring less energy to heat this portion of the outside air. An arc-shaped channel 620 is provided between the rising channel 610 and the horizontal channel 630. The circulating fan 500 draws air into the rising channel 610 of the circulating duct 600 and blows it along the arc-shaped channel 620 towards the horizontal channel 630. The air velocity is high in the arc-shaped channel 620 and slow in the inlet duct 700. According to Bernoulli's principle, a negative pressure is formed near the connection between the inlet duct 700 and the arc-shaped channel 620, causing outside air to be drawn into the arc-shaped channel 620 through the inlet duct 700. 0. Along with the horizontal channel 630, the air is introduced into the upper air duct 100 for heating. The horizontal setting of the air inlet pipe 700 at the arc-shaped channel 620 can prevent the rising channel 610 from being directly aligned with the air inlet pipe 700, which would cause the air inside the pipe to be discharged through the air inlet pipe 700 and prevent the outside air from entering through the air inlet pipe 700. By discharging low-temperature humid air and introducing dry outside air, and because the dry air in the outside environment is also hotter than the low-temperature humid air discharged through the exhaust pipe 800, less energy is consumed when heating this part of the outside air, thus achieving the effect of reducing energy consumption by utilizing the high-temperature outside air.

[0034] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present utility model, and these improvements and substitutions should also be considered within the protection scope of the present utility model.

Claims

1. A pulp molding and drying apparatus, characterized in that, It includes an upper air duct and a lower air duct. The bottom of the upper air duct is connected to a radiator, and the radiator is equipped with heat dissipation fins. The bottom of the radiator is connected to a drying box. The pulp to be dried is placed inside the drying box. The inside of the drying box is connected to the lower air duct to form a drying channel. A circulating fan is installed at the output end of the lower air duct. The output end of the circulating fan is connected to a circulating air duct that communicates with the upper air duct. The upper air duct, the radiator, the drying box, the lower air duct, and the circulating air duct form a circulating loop. A dehumidification pipe communicating with the external environment is installed on the circulating air duct. The circulating air duct includes an upward-directed ascending channel and a horizontally arranged horizontal channel. The horizontal channel communicates with the upper air duct. An arc-shaped channel is provided between the ascending channel and the horizontal channel. An air inlet pipe communicating with the external environment is connected to the arc-shaped channel. The air inlet pipe is horizontally arranged.

2. The pulp molding and drying apparatus according to claim 1, characterized in that, The dehumidification pipe is connected to the rising channel and is aligned with the air outlet of the circulating fan.

3. The pulp molding and drying apparatus according to claim 2, characterized in that, The dehumidification pipe is connected to a bypass dehumidification pipe, which can be connected to a pulp forming machine.

4. The pulp molding and drying apparatus according to claim 1, characterized in that, The radiator is provided with a heat transfer oil inlet and a heat transfer oil outlet that communicate with the interior of the heat sink.

5. The pulp molding and drying apparatus according to claim 1, characterized in that, The drying chamber is equipped with a conveyor belt inside, on which a tray for supporting pulp is mounted. The conveyor belt extends to the outside of the drying chamber and is connected to a feeding device and a discharging device.

6. The pulp molding and drying apparatus according to claim 1, characterized in that, The air inlet pipe is located near the horizontal channel in the arc-shaped channel, and the air inlet pipe is inserted into the horizontal channel from the arc-shaped channel.

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