Air supplement device of energy-saving dehumidification dryer

Abstract

The utility model discloses an air supplement device of an energy-saving dehumidification dryer, which comprises a first pipeline, a second pipeline and a third pipeline, the first pipeline is provided with a first filter and a first control valve; the second pipeline is configured to be a first concentric-square-shaped pipeline connected end to end, the outlet end of the first pipeline is connected with the second pipeline, the connecting position of the first pipeline and the second pipeline is a first connecting part, and the first connecting part is provided with a second control valve; the third pipeline is connected with the second pipeline and the dehumidification dryer, and the connecting position of the third pipeline and the second pipeline is a second connecting part; two sets of second filters are arranged at the position, located between the first connecting part and the second connecting part, of the first concentric-square-shaped pipeline, a third control valve is further arranged at the position, located between the second filters and the second connecting part, of the second pipeline, the two sets of second filters can alternately work or regenerate, and the working efficiency is high. The air supplement device can reduce the dew point of the dry air.

Description

Technical Field

[0001] The utility model relates to the technical field of dehumidification and drying, in particular to an air supply device for an energy-saving dehumidification dryer. Background Art

[0002] In the process of plastic processing, problems such as shrinkage, silver streaks, bubbles, cracks, flow marks, and poor transparency may occur in products. The main reason for these problems is that the raw materials are not dried before processing and forming. For plastic injection molding, dehumidification drying is an essential process for most plastics. Therefore, when using hygroscopic materials or moisture-sensitive materials as raw materials, the raw materials need to be dehumidified and dried before forming.

[0003] Currently, rotary dehumidification dryers are widely used for the dehumidification and drying process. To solve problems such as low energy utilization rate of rotary dehumidification dryers, temperature sensing needles are provided at the air return port of existing rotary dehumidification dryers, and the control of the fan air volume and the power of the drying heater is achieved by real-time monitoring and comparison of the air return temperature.

[0004] However, when the air volume of the existing improved rotary dehumidification dryer changes frequently, the air volume passing through the honeycomb rotor decreases, and the air volume in the cooling area of the honeycomb rotor decreases, resulting in an increase in the dew point of the dried air. At the same time, the rapid change in air volume will cause the heating pipes to overheat frequently, thereby reducing the stability of the entire system. Summary of the Utility Model

[0005] The utility model aims to solve at least one of the technical problems existing in the prior art. For this purpose, the utility model provides an air supply device for an energy-saving dehumidification dryer, which can reduce the dew point of the dried air.

[0006] An air supply device for an energy-saving dehumidification dryer according to an embodiment of the first aspect of the utility model includes:

[0007] A first pipeline, provided with a first filter for filtering impurities and a first control valve for controlling the opening of the first pipeline. The first filter is located on one side close to the inlet end of the first pipeline, and the first control valve is located on one side close to the outlet end of the first pipeline. Compressed air can be input from the inlet end of the first pipeline;

[0008] A second pipeline, configured as a first loop pipeline connected end to end. The outlet end of the first pipeline is connected to the second pipeline, and the connection position of the first pipeline and the second pipeline is a first connection part. The first connection part is provided with a second control valve for adjusting the gas flow direction;

[0009] A third pipeline, connecting the second pipeline and the dehumidification dryer. The connection position of the third pipeline and the second pipeline is a second connection part;

[0010] Wherein, a second filter is provided at a position between the first connecting portion and the second connecting portion of the first return pipeline. There are two sets of the second filters, which are used to dry the compressed air. A third control valve is further provided between the second filter and the second connecting portion of the second pipeline, and the third control valve is used to adjust the gas flow direction.

[0011] The air supply replenishing device according to the embodiment of the present invention has at least the following beneficial effects: Compressed gas enters from the first pipeline and is filtered by the first filter to remove impurities such as oil mist. The first control valve is opened, and the compressed air enters the second control valve. The second control valve controls the compressed air to enter one of the two sets of second filters. After being filtered by the second filter to remove moisture, a part of the dried compressed air flows out through the third pipeline to the dehumidifying dryer, and the other part enters the other set of second filters through the first return pipeline to regenerate the other set of second filters. The two sets of second filters work or regenerate alternately, improving efficiency and consuming less energy. The air supply replenishing device can reduce the dew point of the dried air.

[0012] According to some embodiments of the present invention, the second filter is configured as a drying barrel filled with molecular sieve.

[0013] According to some embodiments of the present invention, the second control valve has a second return pipeline connected end to end. The second return pipeline is provided with four valve bodies, which are the first valve body, the second valve body, the third valve body, and the fourth valve body in sequence along the pipeline length direction. The outlet end of the first pipeline is located between the first valve body and the second valve body. The first return pipeline and the second return pipeline have two connection positions, namely the third connection portion and the fourth connection portion. The third connection portion is located between the second valve body and the third valve body, and the fourth connection portion is located between the first valve body and the fourth valve body. A silencer is provided at a position before the third valve body and the fourth valve body of the second return pipeline, and the silencer can discharge gas.

[0014] According to some embodiments of the present invention, the first valve body, the second valve body, the third valve body, and the fourth valve body are all configured as pneumatic valves.

[0015] According to some embodiments of the present invention, the first return pipeline is further provided with a connecting pipeline, which is located between the second filter and the third control valve and is used to connect the two sets of second filters.

[0016] According to some embodiments of the present invention, the connecting pipeline is configured as a flow limiting pipe capable of restricting gas flow.

[0017] According to some embodiments of the present utility model, the first pipeline is further provided with a fourth control valve for regulating gas pressure, and the fourth control valve is located on one side of the first filter close to the inlet end of the first pipeline.

[0018] According to some embodiments of the present utility model, the third control valve is configured as a check valve.

[0019] According to some embodiments of the present utility model, the first filter includes an oil mist filter and a microorganism filter, and the oil mist filter is located at the inlet end of the microorganism filter.

[0020] According to some embodiments of the present utility model, the first control valve is configured as a solenoid valve.

[0021] Additional aspects and advantages of the present utility model will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present utility model. Description of the Drawings

[0022] The following further describes the present utility model in conjunction with the drawings and embodiments, where:

[0023] Figure 1 It is a schematic diagram of the air supply supplement device of the energy-saving dehumidifying and drying machine according to an embodiment of the present utility model.

[0024] Reference Signs:

[0025] Honeycomb rotor 1, drying area 2, cooling area 3, regeneration area 4, first pipeline 5, second pipeline 6, third pipeline 7, first filter 8, second filter 9, third filter 10, fourth filter 11, regeneration fan 12, drying fan 13, first heater 14, second heater 15, cooler 16, dew point detector 17, storage bin 18, first control valve 19, second control valve 20, third control valve 21, fourth control valve 22, first return pipeline 23, second return pipeline 24, first valve body 25, second valve body 26, third valve body 27, fourth valve body 28, silencer 29, flow limiting pipe 30. Detailed Embodiments

[0026] The following details the embodiments of the present utility model. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation to the present utility model.

[0027] In the description of the present utility model, it should be understood that for the orientation description, such as the orientation or positional relationship indicated by up, down, front, back, left, right, etc., is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0028] In the description of the present utility model, the meaning of several is one or more, the meaning of multiple is two or more. Understandings such as greater than, less than, exceeding, etc. do not include the present number, and understandings such as above, below, within, etc. include the present number. If there is a description of first and second, it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0029] In the description of the present utility model, unless otherwise clearly defined, words such as setting, installing, connecting, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in the present utility model in combination with the specific content of the technical solution.

[0030] Plastic products are produced through injection molding. During the production process, phenomena such as shrinkage, silver streaks, air bubbles, cracks, flow marks, and poor transparency may occur in the products. The main reason for these phenomena is that the raw materials are not dried before processing and forming. Therefore, dehumidifying and drying is an essential process for most plastics. When using hygroscopic materials or moisture-sensitive materials as raw materials, the raw materials need to be dehumidified and dried before forming.

[0031] Currently, a rotary dehumidifying dryer is widely used for the dehumidifying and drying process. To solve problems such as low energy utilization rate of the rotary dehumidifying dryer, a temperature sensing needle is provided at the air return port of the existing rotary dehumidifying dryer, and the control of the fan air volume and the power of the drying heater is achieved by real-time monitoring and comparison of the air return temperature.

[0032] However, when the air volume of the existing improved rotary dehumidifying dryer changes frequently, the air volume passing through the honeycomb rotor decreases, and the air volume in the cooling area of the honeycomb rotor decreases, resulting in a decline in the dew point performance of the gas. At the same time, the rapid change of the air volume will cause the heating tube to overheat frequently, thus reducing the stability of the entire system.

[0033] In view of the above technical problems, the present utility model proposes a make-up air device for an energy-saving dehumidifying dryer, which can supply air with a low dew point and few impurities to the dehumidifying dryer, improve the stability of the dehumidifying dryer, and reduce the fluctuation of the system heating temperature.

[0034] The following describes the make-up air device for an energy-saving dehumidifying dryer according to an embodiment of the present utility model with reference to the drawings.

[0035] Referring to Figure 1 As shown, in the embodiment of the present utility model, the energy-saving dehumidifying dryer includes a storage barrel 18, a honeycomb rotor 1, a regeneration assembly, a return air assembly, and a supply air assembly. The regeneration assembly is used to regenerate the honeycomb rotor 1, that is, to remove the moisture absorbed by the honeycomb rotor 1. The return air assembly is used to guide the humid gas in the storage barrel 18 to the honeycomb rotor 1 and cool the humid gas in advance. The supply air assembly is used to re-input the air dried by the honeycomb rotor 1 into the storage barrel 18.

[0036] It should be noted that, in the embodiment of the present utility model, the honeycomb rotor 1 has three zones, namely a drying zone 2, a regeneration zone 4, and a cooling zone 3. The molecular sieve in the drying zone 2 is used to dry the humid gas sent from the storage barrel 18. The regeneration zone 4 is used to regenerate and restore the molecular sieve rotated from the drying zone 2, that is, to remove the moisture of the molecular sieve. The cooling zone 3 is used to cool the molecular sieve rotated from the regeneration zone 4. Since the molecular sieve in the drying zone 2 of the honeycomb rotor 1 will become saturated with moisture after working for a period of time and its drying capacity will decrease, the honeycomb rotor 1 will rotate to move the humid molecular sieve in the drying zone 2 to the regeneration zone 4. After the dried and high-temperature molecular sieve that has been regenerated and restored in the original regeneration zone 4 is transferred to the cooling zone 3 for cooling, it is then transferred to the drying zone 2 for drying, and so on in a cycle. The molecular sieve in the honeycomb rotor 1 is made of a material that will release moisture at high temperatures and absorb moisture at low temperatures. If it does not pass through the cooling zone 3, the molecular sieve transferred from the regeneration zone 4 to the drying zone 2 will be very hot and unable to absorb moisture.

[0037] It should be noted that, in the embodiment of the present utility model, the regeneration assembly includes a third filter 10, a regeneration fan 12, and a first heater 14 connected in sequence through pipes. The third filter 10 is the air inlet end, and external air enters the regeneration assembly from the third filter 10. One end of the first heater 14 is connected to the regeneration zone 4 of the honeycomb rotor 1. The third filter 10 is used to filter solid impurities and water vapor in the air. The regeneration fan 12 provides driving force to drive the flow of external air. The first heater 14 is used to heat the air in the pipe to improve the ability to remove water vapor from the honeycomb rotor 1. The air used to regenerate the honeycomb rotor 1 is re-sent back to the atmospheric environment.

[0038] It should be noted that in the embodiment of the present utility model, the return air assembly includes a fourth filter 11, a cooler 16, and a drying fan 13 that are sequentially connected through a pipeline. The fourth filter 11 serves as the input end of the humid gas in the storage bin 18, and one end of the drying fan 13 is connected to the drying area 2 of the honeycomb rotor 1. Among them, after the pipeline passes through the drying area 2 of the honeycomb rotor 1, a part of the dried gas enters the storage bin 18 through the air supply assembly, and the other part is guided through the pipeline to the regeneration area 4 of the honeycomb rotor 1, cooled in the regeneration area 4, and then returned to the front end of the cooler 16 and input into the cooler 16 to enhance the cooling effect of the cooling area 3. The drying fan 13 provides driving force to drive the air flow in the storage bin 18.

[0039] It should be noted that in the embodiment of the present utility model, the air supply assembly includes a dew point detector 17 and a second heater 15 that are sequentially connected through a pipeline. One end of the dew point detector 17 is connected to the drying area 2 of the honeycomb rotor 1 to detect the dew point of the dried gas sent out from the drying area 2. One end of the second heater 15 is connected to the storage bin 18, and the second heater 15 is used to heat the dried gas to improve the dehumidification effect. [[ID=u4]]

[0040] Refer to Figure 1 As shown, in the embodiment of the present utility model, the makeup air device is connected to the pipeline between the dew point detector 17 and the honeycomb rotor 1 to supplement dried gas to the storage bin 18. The makeup air device includes a first pipeline 5, a second pipeline 6, and a third pipeline 7.

[0041] It should be noted that in the embodiment of the present utility model, the first pipeline 5 is provided with a first filter 8 for filtering impurities and a first control valve 19 for controlling the opening of the first pipeline 5. The first filter 8 is located on the side close to the inlet end of the first pipeline 5, and the first control valve 19 is located on the side close to the outlet end of the first pipeline 5. Compressed air can be input from the inlet end of the first pipeline 5. The first pipeline 5 is also provided with a fourth control valve 22 for adjusting the gas pressure, and the fourth control valve 22 is located on the side of the first filter 8 close to the inlet end of the first pipeline 5.

[0042] It should be noted that in the embodiment of the present utility model, the second pipeline 6 is configured as a first loop pipeline 23 connected end to end. The outlet end of the first pipeline 5 is connected to the second pipeline 6, and the connection position of the first pipeline 5 and the second pipeline 6 is the first connection part. The first connection part is provided with a second control valve 20 for adjusting the gas flow direction. The third pipeline 7 is connected to the second pipeline 6 and the dehumidification dryer, and the connection position of the third pipeline 7 and the second pipeline 6 is the second connection part. Among them, the first loop pipeline 23 is provided with two groups of second filters 9 between the first connection part and the second connection part. The second filters 9 are used to dry the compressed air. The second pipeline 6 is also provided with a third control valve 21 between the second filter 9 and the second connection part, and the third control valve 21 is used to adjust the gas flow direction.

[0043] In addition, the second control valve 20 has a second return pipeline 24 connected end to end. The second return pipeline 24 is provided with four valve bodies, which are successively the first valve body 25, the second valve body 26, the third valve body 27, and the fourth valve body 28 along the length direction of the pipeline. The outlet end of the first pipeline 5 is located between the first valve body 25 and the second valve body 26. The first return pipeline 23 and the second return pipeline 24 have two connection positions, namely the third connection part and the fourth connection part. The third connection part is located between the second valve body 26 and the third valve body 27, and the fourth connection part is located between the first valve body 25 and the fourth valve body 28. A silencer 29 is provided at the position of the second return pipeline 24 before the third valve body 27 and the fourth valve body 28, and the silencer 29 can discharge gas.

[0044] It can be understood that in the embodiment of the present utility model, the first control valve 19 is configured as a solenoid valve, the third control valve 21 is configured as a check valve, and the first valve body 25, the second valve body 26, the third valve body 27, and the fourth valve body 28 are all configured as pneumatic valves. The first filter 8 includes an oil mist filter and a microfilter, and the oil mist filter is located at the inlet end of the microfilter. The second filter 9 is configured as a drying barrel filled with molecular sieve.

[0045] It should be noted that in the embodiment of the present utility model, the first return pipeline 23 is further provided with a connecting pipeline, which is located between the second filter 9 and the third control valve 21 and is used to connect two groups of second filters 9. The connecting pipeline is configured as a flow limiting pipe 30 capable of restricting the gas flow.

[0046] The working principle of the air supply replenishing device of the present utility model is as follows:

[0047] As Figure 1As shown, taking the second filter 9 on the left side as the drying main body and the second filter 9 on the right side as the reduction main body as an example, when the air supply device is started, the air is compressed by the external compressor and then conveyed to the first pipeline 5. The compressed air sequentially passes through the fourth control valve 22 and the first filter 8 and reaches the first control valve 19. The gas pressure of the compressed air is adjusted by the fourth control valve 22, and the oil mist and other impurities are filtered out by the first filter 8. The first control valve 19 is opened, and the compressed air enters the second return pipeline 24 of the second control valve 20. The first valve body 25 and the third valve body 27 are closed, and the second valve body 26 and the fourth valve body 28 are opened. The compressed air enters the second filter 9 on the left side. The second filter 9 on the left side adsorbs the moisture of the compressed air. A part of the dried compressed air enters the dehumidifying dryer, and a part reaches the right side of the first return pipeline 23 through the flow limiting pipe 30 and enters the second filter 9 on the right side to adsorb the moisture of the molecular sieve of the second filter 9 to achieve reduction, and then flows out to the atmospheric environment through the silencer 29. This process can perform drying and reduction simultaneously, and does not require additional power or energy, with high efficiency and less resource consumption.

[0048] It can be understood that by reversing the above working principle, the second filter 9 on the left can be used for reduction and the second filter 9 on the right can be used for drying, which will not be described in detail here.

[0049] The air supply device of the present utility model can use two drying barrels to work alternately or be regenerated, can reduce the dew point of the dried air, and improve the working efficiency of the dehumidifying dryer.

[0050] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those of ordinary skill in the art, various changes can be made without departing from the gist of the present utility model.

Claims

1. An air supply device for an energy-saving dehumidifying dryer, characterized in that, Including: A first pipeline, provided with a first filter for filtering impurities and a first control valve for controlling the opening of the first pipeline. The first filter is located on one side close to the inlet end of the first pipeline, and the first control valve is located on one side close to the outlet end of the first pipeline. Compressed air can be input from the inlet end of the first pipeline; A second pipeline, configured as a first loop pipeline connected end to end. The outlet end of the first pipeline is connected to the second pipeline, and the connection position of the first pipeline and the second pipeline is a first connection part. The first connection part is provided with a second control valve for adjusting the gas flow direction; A third pipeline, connecting the second pipeline and the dehumidifying dryer. The connection position of the third pipeline and the second pipeline is a second connection part; Wherein, the first loop pipeline is provided with a second filter at the position between the first connection part and the second connection part. There are two groups of the second filters, and the second filters are used for drying the compressed air. A third control valve is further provided between the second filter and the second connection part of the second pipeline, and the third control valve is used for adjusting the gas flow direction.

2. The air make-up device of an energy-saving dehumidifying dryer according to claim 1, characterized in that, The second filter is configured as a drying barrel filled with molecular sieve.

3. The air make-up device of an energy-saving dehumidifying dryer according to claim 1, characterized in that, The second control valve has a second loop pipeline connected end to end. The second loop pipeline is provided with four valve bodies, which are a first valve body, a second valve body, a third valve body and a fourth valve body in sequence along the pipeline length direction. The outlet end of the first pipeline is located between the first valve body and the second valve body. The first loop pipeline and the second loop pipeline have two connection positions, which are a third connection part and a fourth connection part respectively. The third connection part is located between the second valve body and the third valve body, and the fourth connection part is located between the first valve body and the fourth valve body. A muffler is provided at the position of the second loop pipeline before the third valve body and the fourth valve body, and the muffler can discharge gas.

4. The air make-up device of an energy-saving dehumidifying dryer according to claim 3, characterized in that, The first valve body, the second valve body, the third valve body and the fourth valve body are all configured as pneumatic valves.

5. The air make-up device of an energy-saving dehumidifying dryer according to claim 1, characterized in that, The first loop pipeline is further provided with a connecting pipeline, which is located between the second filter and the third control valve and is used for communicating the two groups of the second filters.

6. The air make-up device of an energy-saving dehumidifying dryer according to claim 5, characterized in that, The connecting pipeline is configured as a flow-limiting pipe capable of restricting the gas flow.

7. The air make-up device of an energy-saving dehumidifying dryer according to claim 1, characterized in that, The first pipeline is further provided with a fourth control valve for adjusting the gas pressure, and the fourth control valve is located on one side of the first filter close to the inlet end of the first pipeline.

8. The air supply device of an energy-saving dehumidifying dryer according to claim 1, characterized in that, The third control valve is configured as a check valve.

9. The air make-up device of an energy-saving dehumidifying dryer according to claim 1, characterized in that, The first filter includes an oil mist filter and a microbe filter, and the oil mist filter is located at the inlet end of the microbe filter.

10. The air make-up device of an energy-saving dehumidifying dryer according to claim 1, characterized in that, The first control valve is configured as an electromagnetic valve.

Images