Double-cooling device for film workshop

Abstract

The utility model relates to the field of film production cooling equipment, in particular to a double-cooling device for a film workshop, which comprises a cooling circulation pipeline, a chilled water circulation pipeline, a first heat exchanger, a second heat exchanger, a second heat exchanger and a third heat exchanger. The chilled water circulation pipeline is communicated with the first heat exchanger, a second heat exchanger is arranged on the cooling circulation pipeline, and an air shower tower circulation pipeline with the internal medium temperature higher than the internal medium temperature of the chilled water circulation pipeline is arranged on the second heat exchanger in a communicated mode. A first independent control valve is arranged on the chilled water circulating pipeline, and a second independent control valve is arranged on the air shower tower circulating pipeline. According to different external temperature conditions, the mode of cooling water is adjusted, the production cost is reduced, and the cooling effect is improved.

Description

Technical Field

[0001] This application relates to the field of cooling equipment for thin film production, and more particularly to a dual cooling device for a film workshop. Background Technology

[0002] Film is a newly developed soft plastic material in the packaging materials industry. As a new type of high-performance packaging material, this film has high mechanical strength, high transparency, impact resistance, puncture resistance, and a series of advantages such as small deformation and reusability. It can reduce the thickness, weight and cost of existing plastic packaging materials, thus achieving good environmental protection effects.

[0003] In the film production process, water is used as a medium to cool the material, ultimately forming the film product. A film production line includes a melt extrusion unit, forming die, cooling unit, and winding unit. The cooling unit employs a water-based cooling system, comprising a circulating water path, a temperature control module, and a water treatment subsystem, to achieve phase change control from melt to solid film.

[0004] Regarding the aforementioned technologies, the inventors believe that currently, natural water or specially chilled water is generally used to cool the film surface. However, due to the influence of the external environment temperature, natural water or chilled water is difficult to achieve high adaptability during the cooling process. When the external environment and water temperature do not match, high production costs or poor results are generated. Utility Model Content

[0005] In order to adjust the cooling water pattern according to different external temperature conditions, reduce production costs, and improve cooling effect, this application provides a dual cooling device for a membrane workshop.

[0006] This application provides a dual cooling device for a membrane workshop, which adopts the following technical solution:

[0007] A dual cooling device for a membrane workshop includes a cooling circulation pipeline with a first circulation pump installed on it, a chilled water circulation pipeline, a first heat exchanger installed on the cooling circulation pipeline, the chilled water circulation pipeline being connected to the first heat exchanger, a second heat exchanger installed on the cooling circulation pipeline, and an air shower tower circulation pipeline connected to the second heat exchanger with an internal medium temperature higher than that of the chilled water circulation pipeline. A first independent control valve is installed on the chilled water circulation pipeline, and a second independent control valve is installed on the air shower tower circulation pipeline.

[0008] Optionally, the second heat exchanger is located upstream of the first heat exchanger near the cooling circulation line.

[0009] Optionally, the start-up priority of the air shower tower circulation pipeline is higher than that of the chilled water circulation pipeline.

[0010] Optionally, a first temperature measuring element is installed at the inlet end of the cooling circulation pipeline of the second heat exchanger, and a second temperature measuring element is installed at the outlet end of the cooling circulation pipeline of the second heat exchanger. When the difference between the first temperature measuring element and the second temperature measuring element is less than a predetermined value, the chilled water circulation pipeline is started.

[0011] Optionally, a first temperature controller is installed on the chilled water circulation pipeline, and a second temperature controller is installed on the air shower tower circulation pipeline. The first temperature controller is connected to the first independent control valve via signal, and the second temperature controller is connected to the second independent control valve via signal.

[0012] Optionally, the first temperature controller is located at the upstream end of the first heat exchanger near the chilled water circulation pipeline, and the second temperature controller is located at the upstream end of the second heat exchanger near the air shower tower circulation pipeline.

[0013] Optionally, both the first independent control valve and the second independent control valve are RTK electric control valves.

[0014] Optionally, a second circulation pump is installed on the chilled water circulation pipeline, and a third circulation pump is installed on the air shower tower circulation pipeline.

[0015] Optionally, the chilled water circulation pipeline is supplied with water from a chiller, and the air shower tower circulation pipeline is supplied with water from an air shower tower.

[0016] Optionally, the cooling circulation pipeline is fitted with an insulation layer on its outer side.

[0017] In summary, this application includes at least one of the following beneficial technical effects:

[0018] 1. When the outside temperature is not higher than the predetermined temperature, the air shower tower circulation pipeline can be used first to exchange heat with the cooling medium inside the cooling circulation pipeline through the first heat exchanger. When the outside temperature is higher than the predetermined temperature, and heat exchange through the air shower tower circulation pipeline alone is insufficient, the chilled water circulation pipeline can be started to exchange heat with the cooling medium inside the cooling circulation pipeline through the second heat exchanger. This allows for different heat exchange effects to be adjusted for different temperature conditions, saving energy consumption.

[0019] 2. The valve opening is precisely positioned by the RTK electric actuator, ensuring accurate temperature control. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of a dual cooling device for a membrane workshop according to an embodiment of this application.

[0021] Explanation of reference numerals in the attached drawings: 1. Cooling circulation pipeline; 11. First circulation pump; 12. Membrane production line; 2. Chilled water circulation pipeline; 21. First heat exchanger; 22. Chiller; 23. Second circulation pump; 24. First independent control valve; 25. First temperature controller; 3. Air shower tower circulation pipeline; 31. Second heat exchanger; 32. Air shower tower; 33. Third circulation pump; 34. Second independent control valve; 35. Second temperature controller. Detailed Implementation

[0022] To better understand the above-mentioned objectives, features, and advantages of this application, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0023] Many specific details are set forth in the following description in order to provide a full understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below.

[0024] The following is in conjunction with the appendix Figure 1 This application will be described in further detail.

[0025] This application discloses a dual cooling device for a membrane workshop. (Refer to...) Figure 1 A dual cooling device for a membrane workshop includes a cooling circulation line 1, which is used to cool the membrane surface on the membrane production line 12. The cooling medium located inside the cooling circulation line 1 cools the membrane production line, but its temperature rises due to heat exchange, making it difficult to circulate and cool the membrane production line again.

[0026] A chilled water circulation pipeline 2 is installed on one side of the cooling circulation pipeline 1. The chilled water circulation pipeline 2 is used to exchange heat and cool down the cooling medium inside the cooling circulation pipeline 1. An air shower tower circulation pipeline 3 is also installed on one side of the cooling circulation pipeline 1. The air shower tower circulation pipeline 3 is used to exchange heat and cool down the cooling medium inside the cooling circulation pipeline 1.

[0027] In some embodiments, the chilled water circulation pipeline 2 uses a chiller 22 to cool the internal cooling medium, and the air shower circulation pipeline 3 uses an air shower 32 to cool the internal cooling medium. The temperature of the medium inside the chilled water circulation pipeline 2 is lower than the temperature of the medium inside the air shower circulation pipeline 3. The energy consumption of the air shower 32 in cooling the internal cooling medium is lower than the energy consumption of the chiller 22 in cooling the internal medium. When the heat exchange requirement is not high, the air shower circulation pipeline 3 is preferentially used to exchange heat with the cooling circulation pipeline 1. If the cooling capacity is still insufficient after heat exchange with the air shower circulation pipeline 3, the chilled water circulation pipeline 2 is started to exchange heat with the cooling circulation pipeline 1.

[0028] A first circulation pump 11 is installed on the cooling circulation pipeline 1. The first circulation pump 11 drives the cooling medium located inside the cooling circulation pipeline 1 to circulate from the cooling medium outlet end of the membrane production line 12 toward the cooling medium inlet end of the membrane production line 12.

[0029] Chilled water circulation line 2 and cooling circulation line 1 exchange heat through the first heat exchanger 21, and air shower circulation line 3 and cooling circulation line 1 exchange heat through the second heat exchanger 31. The second heat exchanger 31 is located upstream of the first heat exchanger 21, so the cooling medium inside the cooling circulation line 1 is first exchanged through the air shower circulation line 3. Then, by evaluating the heat exchange situation, the chilled water circulation line 2 is activated to perform a second heat exchange on the cooling medium inside the cooling circulation line 1. The cooling medium that has been heat exchanged inside the cooling circulation line 1 is then recirculated into the membrane production line 12 for processing.

[0030] A second circulation pump 23 is installed on the chilled water circulation pipeline 2. The second circulation pump 23 is used to drive the cooling medium inside the chilled water circulation pipeline 2 to flow. A first independent control valve 24 is also installed on the chilled water circulation pipeline 2. The first independent control valve 24 is used to control the opening degree inside the chilled water circulation pipeline 2, thereby adjusting the flow rate of the cooling medium inside the chilled water circulation pipeline 2, and ultimately controlling the flow rate of the heat exchange medium entering the first heat exchanger 21, thereby adjusting the heat exchange effect.

[0031] A third circulation pump 33 is installed on the air shower tower circulation pipeline 3. The third circulation pump 33 is used to drive the flow of the cooling medium inside the air shower tower circulation pipeline 3. A second independent control valve 34 is also installed on the air shower tower circulation pipeline 3. The second independent control valve 34 is used to control the opening degree inside the air shower tower circulation pipeline 3, thereby adjusting the flow rate of the medium inside the air shower tower circulation pipeline 3, and ultimately controlling the flow rate of the heat exchange medium entering the second heat exchanger 31, thus adjusting the heat exchange effect.

[0032] In a specific embodiment, both the first independent control valve 24 and the second independent control valve 34 are RTK electric control valves. The valve opening is precisely positioned by the RTK electric actuator, ensuring precise temperature control.

[0033] A first temperature controller 25 is installed on the chilled water circulation pipeline 2. The first temperature controller 25 is located at the upstream end of the first heat exchanger 21 near the interior of the chilled water circulation pipeline 2. The first temperature controller 25 is connected to the first independent control valve 24. The first temperature controller 25 is used to monitor the temperature of the cooling medium located inside the chilled water circulation pipeline 2, and the first temperature controller 25 precisely controls the opening degree of the first independent control valve 24.

[0034] A second temperature controller 35 is installed on the air shower tower circulation pipeline 3. The second temperature controller 35 is located at the upstream end of the second heat exchanger 31 near the interior of the air shower tower circulation pipeline 3. The second temperature controller 35 is connected to the second independent control valve 34. The second temperature controller 35 is used to monitor the temperature of the cooling medium inside the air shower tower circulation pipeline 3, and the second temperature controller 35 precisely controls the opening degree of the second independent control valve 34.

[0035] A first temperature sensor is installed on the cooling circulation pipeline 1 at the inlet end relative to the second heat exchanger 31. The first temperature sensor is used to measure the temperature of the internal cooling medium in the cooling circulation pipeline 1 at the inlet position of the second heat exchanger 31. A second temperature sensor is installed at the outlet end of the cooling circulation pipeline 1 relative to the second heat exchanger 31. The second temperature sensor is used to measure the temperature of the internal cooling medium in the cooling circulation pipeline 1 at the outlet position of the second heat exchanger 31. Through the first and second heat exchangers, the temperature changes of the medium inside the cooling circulation pipeline 1 before and after entering the second heat exchanger 31 can be obtained, thus demonstrating the heat exchange effect of the second heat exchanger 31 on the medium inside the cooling circulation pipeline 1.

[0036] When the difference between the first and second temperature measuring elements is not less than the predetermined value, it indicates that the cooling effect of the air shower tower circulation pipeline 3 on the cooling circulation pipeline 1 meets expectations. Therefore, it is not necessary to start the chilled water circulation pipeline 2 to exchange heat with the cooling circulation pipeline 1 through the second heat exchanger 31, thus saving resources.

[0037] When the difference between the first and second temperature measuring elements is less than the predetermined value, it indicates that the cooling effect of the air shower tower circulation pipeline 3 on the cooling circulation pipeline 1 does not meet expectations. At this time, the chilled water circulation pipeline 2 is started to perform secondary heat exchange on the cooling circulation pipeline 1 through the second heat exchanger 31 to cool down the cooling medium located inside the cooling circulation pipeline 1.

[0038] The first and second temperature measuring devices ensure that the start-up priority of the air shower circulation pipeline 3 is higher than that of the chilled water circulation pipeline 2. The air shower circulation pipeline 3 is used first to cool the cooling medium inside the cooling circulation pipeline 1. When the heat exchange and cooling effect of the air shower circulation pipeline 3 on the cooling medium inside the cooling circulation pipeline 1 does not meet expectations, the chilled water circulation pipeline 2 is used for secondary heat exchange to improve the heat exchange and cooling effect.

[0039] An insulation layer is also provided on the outer wall of the cooling circulation pipeline 1. The insulation layer can keep the cooling circulation pipeline 1 warm and reduce the temperature impact of the external ambient temperature on the cooling circulation pipeline 1.

[0040] In this application, the term "multiple" refers to at least two or more, unless otherwise expressly defined. The terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "linking" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0041] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

Claims

1. A dual cooling device for a membrane workshop, comprising a cooling circulation pipeline (1), wherein a first circulation pump (11) is installed on the cooling circulation pipeline (1), characterized in that: It also includes a chilled water circulation pipeline (2), a first heat exchanger (21) is provided on the cooling circulation pipeline (1), the chilled water circulation pipeline (2) is connected to the first heat exchanger (21), a second heat exchanger (31) is provided on the cooling circulation pipeline (1), and an air shower tower circulation pipeline (3) with an internal medium temperature higher than that of the chilled water circulation pipeline (2) is connected to the second heat exchanger (31). A first independent control valve (24) is provided on the chilled water circulation pipeline (2), and a second independent control valve (34) is provided on the air shower tower circulation pipeline (3).

2. The dual cooling device for the membrane workshop according to claim 1, characterized in that: The second heat exchanger (31) is located upstream of the first heat exchanger (21) near the cooling circulation line (1).

3. The dual cooling device for the membrane workshop according to claim 2, characterized in that: The startup priority of the air shower tower circulation pipeline (3) is higher than that of the chilled water circulation pipeline (2).

4. The dual cooling device for the membrane workshop according to claim 3, characterized in that: The cooling circulation pipeline (1) is equipped with a first temperature measuring element at the inlet end of the second heat exchanger (31), and the cooling circulation pipeline (1) is equipped with a second temperature measuring element at the outlet end of the second heat exchanger (31). When the difference between the first temperature measuring element and the second temperature measuring element is less than a predetermined value, the chilled water circulation pipeline (2) is started.

5. The dual cooling device for the membrane workshop according to claim 1, characterized in that: A first temperature controller (25) is installed on the chilled water circulation pipeline (2), and a second temperature controller (35) is installed on the air shower tower circulation pipeline (3). The first temperature controller (25) is connected to the first independent control valve (24) by signal, and the second temperature controller (35) is connected to the second independent control valve (34) by signal.

6. The dual cooling device for the membrane workshop according to claim 5, characterized in that: The first temperature controller (25) is located at the upstream end of the first heat exchanger (21) near the chilled water circulation pipeline (2), and the second temperature controller (35) is located at the upstream end of the second heat exchanger (31) near the air shower tower circulation pipeline (3).

7. The dual cooling device for a membrane workshop according to claim 1, characterized in that: Both the first independent control valve (24) and the second independent control valve (34) are RTK electric control valves.

8. The dual cooling device for the membrane workshop according to claim 1, characterized in that: A second circulation pump (23) is installed on the chilled water circulation pipeline (2), and a third circulation pump (33) is installed on the air shower tower circulation pipeline (3).

9. The dual cooling device for a membrane workshop according to claim 1, characterized in that: The chilled water circulation pipeline (2) is supplied by a chiller (22), and the air shower tower circulation pipeline (3) is supplied by an air shower tower (32).

10. The dual cooling device for a membrane workshop according to claim 1, characterized in that: The cooling circulation pipeline (1) is covered with an insulation layer.

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