CN211650897U

CN211650897U - Chilled water circulation system and fiber production system

Info

Publication number: CN211650897U
Application number: CN202020143901.7U
Authority: CN
Inventors: 张兴; 王庆云
Original assignee: Shandong ICD High Performance Fibre Co Ltd
Current assignee: Shandong ICD High Performance Fibre Co Ltd
Priority date: 2020-01-22
Filing date: 2020-01-22
Publication date: 2020-10-09
Anticipated expiration: 2030-01-22

Abstract

The utility model discloses a refrigerated water circulation system and fibre production system. Chilled water circulating system is used for fibre production system, and this chilled water circulating system includes cooling device, circulating pump and refrigerator and forms the closed circulation circuit of chilled water through the main circulating line connection in proper order, and wherein, still include the filter on the closed circulation circuit of chilled water, the feed inlet and the discharge gate of this filter are linked together with the main circulating line through side pipeline respectively to carry out other formula filtration treatment that strains to the chilled water.

Description

Chilled water circulation system and fiber production system

Technical Field

The utility model belongs to the technical field of the fibre apparatus for producing, concretely relates to refrigerated water circulation system and fibre production system.

Background

For example, fibers such as special fibers are in a filament shape, have the characteristics of good elasticity, strength, chemical stability and the like, and are widely applied to the fields of spinning, environmental protection, medical treatment, construction, military and the like. Thus, fiber demand continues to increase and the fiber industry is still in a high-speed developmental stage.

In the production process of fibres, it is often necessary to use chilled water for in-process cooling. For example, in the spinning step, after the spinning solution is discharged from a spinning device, it is necessary to cool and form the spinning solution in a chilled water tank.

SUMMERY OF THE UTILITY MODEL

However, the present inventors have found that a problem of a decrease in heat exchange efficiency often occurs during operation of a chilled water circulation system formed by a refrigerating device having a chilled water demand, such as a chilled water tank, and a refrigerator and a circulation pump. At this time, in order to meet the requirements of the temperature and the usage amount of the chilled water, the energy consumption is greatly increased.

The inventor of the present invention has conducted intensive studies and found that impurities such as iron rust may be present in the circulating chilled water of the chilled water circulation system, and that the heat exchange efficiency and energy waste may be caused by the impurities and the deposits. Therefore, the present inventors have further studied to provide a chilled water circulation system capable of improving heat exchange efficiency and reducing energy consumption.

Therefore, the utility model discloses the first aspect provides a chilled water circulation system, it is used for fibre production system, and this chilled water circulation system includes that cooling device, circulating pump and refrigerator connect through the main circulating line in proper order and form the closed circulation return circuit of chilled water, and wherein, still include the filter on the closed circulation return circuit of chilled water, the feed inlet and the discharge gate of filter are linked together through side pipeline and main circulating line respectively to carry out the other formula filtration treatment that strains to the chilled water.

In an embodiment of the present invention, the filter may be disposed between the circulation pump and the refrigerator.

The utility model discloses an in the embodiment, can be equipped with pressure monitoring devices at the exit end of circulating pump.

In an embodiment of the present invention, the filter may be a bag filter.

In an embodiment of the present invention, the filtration accuracy of the bag filter may be 0.1 μm to 5 μm, further 0.5 μm to 3 μm, and further 1 μm to 2 μm.

The embodiment of the utility model provides an in, the refrigerated water circulation system can be used to the spinning unit of fibre production system, and cooling device is the refrigerated water groove.

In the embodiment of the utility model, the freezing water tank can comprise a plurality of groups of water inlets and water outlets, and a freezing machine and a circulating pump are respectively connected between each group of water inlets and water outlets through a main circulating pipeline to form a plurality of freezing water closed circulating loops; wherein, at least one chilled water closed circulation loop is connected with a filter.

In the embodiment of the present invention, a filter may be connected to each of the chilled water closed circulation loops.

The utility model discloses an in the embodiment, the refrigerated water circulation system still can include the moisturizing device, and the delivery port of moisturizing device is connected with the water inlet of refrigerator.

The utility model discloses the second aspect provides a fibre production system, and it includes the utility model discloses the refrigerated water circulation system of the first aspect.

The utility model provides an among the refrigerated water circulation system, cooling device, circulating pump and refrigerator realize that the refrigerated water circulation is arranged in the cooling device's cooling through the refrigerated water closed circulation loop that the main circulating line connection formed in proper order. Meanwhile, the filter is connected to the chilled water closed circulation loop in a bypass mode, so that the chilled water can be subjected to bypass filtering treatment, impurities such as rust in the circulating chilled water can be effectively removed, the water quality is obviously improved, the heat exchange efficiency of the chilled water circulation system can be effectively improved, and the energy consumption is reduced. In addition, the filter is subjected to side-filtering type filtering treatment, so that the influence on the pressure drop of the system is small, and the normal operation of the system can be ensured. More preferably, the system operating costs can also be reduced. The utility model provides an contain in the fibre production system the utility model discloses a refrigerated water circulation system, therefore have the same advantage with refrigerated water circulation system at least.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments of the present invention will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a flow chart of a chilled water circulation system according to an embodiment of the present invention.

Fig. 2 is a schematic view of a bag filter according to an embodiment of the present invention.

Fig. 3 is a schematic diagram of a spinning unit of a chilled water circulation system for a fiber production system according to an embodiment of the present invention.

Fig. 4 is a flow chart of another chilled water circulation system according to an embodiment of the present invention.

Fig. 5 is a flow chart of a fiber production system according to an embodiment of the present invention.

Detailed Description

In order to make the objects, aspects and advantageous technical effects of the present invention clearer, features and exemplary embodiments of various aspects of the present invention will be described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the invention by illustrating examples of the invention. In the drawings and the following description, at least some well-known structures and techniques have not been shown in detail in order to avoid unnecessarily obscuring the present invention; also, the dimensions of some of the structures may be exaggerated for clarity. Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

In the description of the present invention, it is to be noted that, unless otherwise specified, "above" and "below" are inclusive; "plural" and "several" mean two or more; the terms "upper", "lower", "left", "right", "inner", "outer", and the like, indicate orientations or positional relationships only for convenience in describing the present invention and to simplify the description, but do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The directional terms appearing in the following description are directions shown in the drawings and do not limit the specific structure of the embodiments of the present invention. In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "mounted" and "connected" are to be interpreted broadly, e.g., as either a fixed connection, a removable connection, or an integral connection; can be directly connected or indirectly connected. The specific meaning of the above terms in the present invention can be understood as the case may be, by those of ordinary skill in the art.

The above summary of the present invention is not intended to describe each disclosed embodiment or every implementation of the present invention. The following description more particularly exemplifies illustrative embodiments. At various points throughout this application, guidance is provided through a list of embodiments that can be used in various combinations. In each instance, the list is merely a representative group and should not be construed as exhaustive.

The utility model discloses the first aspect provides a refrigerated water circulation system, it is used for fibre production system. Fig. 1 is a flowchart of a chilled water circulation system as one example. Referring to fig. 1, the chilled water circulation system includes a cooling device 110, a circulation pump 120 and a refrigerator 130, which are sequentially connected via a main circulation pipe 140 to form a chilled water closed circulation loop, wherein the chilled water closed circulation loop further includes a filter 150, and a feed inlet 151 and a discharge outlet 152 of the filter 150 are respectively communicated with the main circulation pipe 140 via a bypass pipe 160, so as to perform bypass filtration treatment on the chilled water.

The cooling device 110 may be any device in a fiber production system that requires the use of chilled water for material, component, or equipment cooling. For example, the cooling device 110 may be a chilled water tank in a spinning unit, a water bath in a water bath unit, or the like.

The circulation pump 120, the chiller 130, the main circulation conduit 140, the bypass conduit 160, and the filter 150 may each be selected from the corresponding devices or components known in the art according to the actual process requirements. In fig. 1, L is a valve. The type of valve can be selected according to the actual process requirements.

The utility model provides an among the refrigerated water circulation system, cooling device 110, circulating pump 120 and refrigerator 130 connect the refrigerated water closed circulation circuit who forms through main circulating line 140 in proper order, realize that refrigerated water circulation is arranged in the cooling of cooling device 110. Meanwhile, the filter 150 is bypass-connected to the closed circulation loop of the chilled water, whereby the chilled water can be bypass-filtered. That is, a part of the circulating chilled water is drawn out of the main circulation pipe 140 and filtered by the filter 150. The circulating chilled water is continuously intercepted by the filter 150 for bypass filtration, so that impurities such as rust and the like in the circulating chilled water can be effectively removed, the water quality is obviously improved, the heat exchange efficiency of the chilled water circulating system can be effectively improved, and the energy consumption is reduced. In addition, since the filter 150 is a side-filtration type filtering treatment, it has little influence on the pressure drop of the chilled water circulation system, and can ensure the normal operation of the system. More preferably, the operation cost of the chilled water circulation system can also be reduced.

Because of the refrigerated water circulation system is closed circulation, under filter 150 constantly intercepts circulation refrigerated water and carries out bypass filtration, can realize once filtering the circulation refrigerated water in the whole closed circulation circuit through certain time, can satisfy operation requirement. In some embodiments, the amount of circulating chilled water bypassed by filter 150 may be between 1% and 10%, further between 3% and 7%, and even further between 4% and 5% of the total amount of circulating chilled water in the chilled water closed loop.

In some embodiments, a filter 150 may be disposed between the circulation pump 120 and the chiller 130. Further, a filter 150 is disposed between the outlet of the circulation pump 120 and the inlet of the refrigerator 130. That is, the inlet 151 and the outlet 152 of the filter 150 are respectively communicated with the main circulation pipe 140 between the outlet of the circulation pump 120 and the inlet of the refrigerator 130 through the bypass pipe 160 to perform the bypass filtering process on the chilled water.

In some embodiments, a pressure monitoring device (not shown) may be provided at the outlet end of the circulation pump 120. It can be determined whether the filter 150 needs to be cleaned or replaced by monitoring the pressure change at the outlet of the circulation pump 120. The pressure monitoring device is for example a pressure sensor.

In some embodiments, the filter 150 may be a bag filter. The bag filter has large filtering area and high filtering precision, and can achieve better circulating chilled water filtering effect. In addition, the filter bag of the bag filter is convenient to replace. When the bag filter is used for a long time and the filter bag needs to be replaced, the bag filter can be conveniently replaced by operators, and the efficiency is improved.

The pressure change at the outlet of the circulation pump 120 can be monitored by a pressure monitoring device to determine whether the bag filter needs to be replaced. As an example, the pressure at the outlet of the circulation pump 120 may be 0.25MPa under normal conditions, and when the pressure reaches 0.3MPa, the filter bag may be replaced.

Fig. 2 is a bag filter as an example. The bag filter includes a housing body 153, a feed port 154 and a discharge port 155 provided at the upper portion and the bottom portion of the housing body 153, and one or more filter bags 156 provided inside the housing body 153. The filter bag 156 may be a filter bag known in the art, and may meet the actual requirements of mechanical properties, filtration properties, and the like. As an example, the filter bag 156 may employ one or more of non-woven fabric, nylon, polypropylene, polyester, polyethylene, and polypropylene.

In some embodiments, the bag filter may have a filtration precision of 0.1 μm to 5 μm, further 0.5 μm to 3 μm, and further 1 μm to 2 μm. The bag filter has higher filtering precision and can improve the filtering effect of the circulating chilled water.

In some embodiments, the chilled water circulation system may be used in a spinning unit of a fiber production system, and the cooling device 110 is a chilled water tank. The chilled water tank, the circulation pump 120, and the refrigerator 130 are connected in sequence via a main circulation pipe 140 to form a chilled water closed circulation loop. The chilled water closed circulation loop further comprises a filter 150, and a feeding port 151 and a discharging port 152 of the filter 150 are respectively communicated with the main circulation pipeline 140 through a bypass pipeline 160 so as to perform bypass filtration type filtration treatment on the chilled water. Therefore, impurities such as rust in the circulating freezing water of the spinning unit can be effectively removed, the water quality is obviously improved, the heat exchange efficiency in the spinning unit can be effectively improved, and the energy consumption and the operation cost are reduced.

As an example, referring to fig. 3 and 5, the spinning unit may include a spinning pack 21, a freezing water tank 22, and a godet 23 located in the freezing water tank 22. The freezing water tank 22 is provided corresponding to the spinning pack 21 so that the filament bundle spun by the spinning pack 21 can reach the godet 23 in the freezing water tank 22. The tow is drawn by rotation of the godet 23 out of the chilled water tank 22 to a subsequent processing unit 30.

The chilled water tank 22 includes a water inlet 22a and a water outlet 22 b. The spinning unit further includes a circulation pump 120 and a refrigerator 130 connected between the inlet 22a and the outlet 22b of the freezing water tank 22 through a main circulation pipe 140 to form a closed circulation loop of the freezing water. Alternatively, the inlet of the circulation pump 120 is connected to the water outlet 22b of the freezing water tank 22, the outlet of the circulation pump 120 is connected to the inlet of the refrigerator 130, and the outlet of the refrigerator 130 is connected to the water inlet 22a of the freezing water tank 22, thereby forming a closed circulation loop of the freezing water.

A filter 150 is bypass-connected to the main circulation pipe 140 between the outlet of the circulation pump 120 and the inlet of the refrigerator 130. Specifically, the inlet 151 and the outlet 152 of the filter 150 are respectively communicated with the main circulation pipe 140 through a bypass pipe 160 to perform a bypass filtration process on the circulating chilled water.

The freezing water closed circulation loop formed by connecting the circulating pump 120 and the freezing machine 130 with the freezing water tank 22 enables the freezing water to circulate continuously, and the temperature of the freezing water in the freezing water tank 22 is guaranteed to meet the production requirement. The filament bundles are cooled by circulating chilled water in a chilled water tank 22 to obtain gel precursor filaments. The gel protofilament is subjected to subsequent treatment by the subsequent treatment unit 30 to obtain a fiber finished product.

In some embodiments, referring to fig. 3, the chilled water tank 22 may include a plurality of sets of water inlets 22a and water outlets 22b, with a chiller 130 and a circulation pump 120 connected between each set of water inlets 22a and water outlets 22b via a main circulation pipe 140, respectively, to form a plurality of chilled water closed circulation loops; wherein, a filter 150 is connected on at least one chilled water closed circulation loop. That is, on at least one of the chilled water closed circulation loops, the inlet 151 and the outlet 152 of the filter 150 are respectively communicated with the main circulation pipe 140 through the bypass pipe 160 to perform a bypass filtering type filtering process on the chilled water.

The filter 150 is connected to at least one chilled water closed circulation loop, so that the circulating cooling water in the system can be filtered in a side-filtering mode, impurities such as rust in the circulating chilled water can be effectively removed, the water quality is obviously improved, the heat exchange efficiency of the chilled water circulating system can be improved, and the energy consumption is reduced. In addition, since the filter 150 is a side-filtration type filtering treatment, it has little influence on the pressure drop of the chilled water circulation system, and can ensure the normal operation of the system. More preferably, the operation cost of the chilled water circulation system can also be reduced.

In some embodiments, a filter 150 may be by-passed on each chilled water closed loop. Therefore, the filtering efficiency can be greatly improved, and the effect can be better exerted.

In some embodiments, referring to fig. 4, the chilled water circulation system may further include a water supplement device 170, and a water outlet of the water supplement device 170 is connected with a water inlet of the freezer 130. Thus, when the amount of the chilled water circulating in the chilled water closed circulation circuit is insufficient, the replenishment may be performed by the water replenishment device 170. Alternatively, the water supplement device 170 may be a buffer tank or a plant water supply device.

Need use the refrigerated water to carry out refrigerated arbitrary process unit in fibre production system, all can set up like the utility model discloses the first aspect the refrigerated water circulation system. The chilled water circulation system described above may be provided, for example, in one or more of a spinning unit, a water bath unit, and the like.

The utility model discloses a fibre production system is owing to adopt the utility model discloses the refrigerated water circulating system of the first aspect, therefore at least have with the utility model discloses a refrigerated water circulating system is the same advantage, no longer gives details here.

Fig. 5 is a fiber production system as an example. The fiber production system comprises a preparation unit 10, a spinning unit 20 and a post-treatment unit 30.

The preparation unit 10 is used to dissolve and filter the spinning raw material to form a spinning solution for spinning. The preparation unit 10 may employ a dissolving device and a filtering device known in the art. Adding the high polymer material and a solvent into a dissolving device to fully dissolve the high polymer material to obtain an initial spinning solution. The dissolving device is, for example, a stirrer or the like. And (3) feeding the initial spinning solution into a filtering device for filtering and purifying, and removing undissolved substances, insoluble substances and the like to obtain the spinning solution. The filter device is for example a candle filter.

The spinning unit 20 includes a spinning pack 21, a freezing water tank 22, and a godet 23 located in the freezing water tank 22. The freezing water tank 22 is arranged corresponding to the spinneret assembly 21, so that the tows sprayed by the spinneret assembly 21 can reach the godet rollers 23 in the freezing water tank 22, and are drawn by the rotation of the godet rollers 23 to be sent out of the freezing water tank 22 to the subsequent processing unit 30.

The chilled water tank 22 includes a water inlet 22a and a water outlet 22 b. Wherein the water outlet 22b may be higher than the godet roller 23 in the freezing water tank 22 by a predetermined height. The spinning unit 20 further comprises a circulation pump 120 and a freezer 130, wherein optionally an inlet of the circulation pump 120 is connected with the water outlet 22b of the chilled water tank 22, an outlet of the circulation pump 120 is connected with an inlet of the freezer 130, and an outlet of the freezer 130 is connected with the water inlet 22a of the chilled water tank 22, thereby forming a closed circulation loop of chilled water. A filter 150 is bypass-connected to the main circulation pipe 140 between the outlet of the circulation pump 120 and the inlet of the refrigerator 130. Specifically, the inlet 151 and the outlet 152 of the filter 150 are respectively communicated with the main circulation pipe 140 through a bypass pipe 160 to perform a bypass filtration process on the circulating chilled water.

The freezing water closed circulation loop formed by connecting the circulating pump 120 and the freezing machine 130 with the freezing water tank 22 enables the freezing water to circulate continuously, and the temperature of the freezing water in the freezing water tank 22 is guaranteed to meet the production requirement. The filament bundles are cooled by circulating chilled water in a chilled water tank 22 to obtain gel precursor filaments.

In some embodiments, the chilled water tank 22 may include three sets of water inlets 22a and outlets 22b, with a chiller 130 and a circulation pump 120 connected between each set of water inlets 22a and outlets 22b via a main circulation pipe 140 to form a plurality of chilled water closed circulation loops, and a filter 150 connected to each chilled water closed circulation loop. That is, on each of the chilled water closed circulation loops, the inlet 151 and the outlet 152 of the filter 150 are respectively communicated with the main circulation pipe 140 through the bypass pipe 160 to perform a bypass filtering process on the chilled water.

In these embodiments, the filter 150 may be a bag filter. And the bag filter with proper treatment capacity and filtering precision can be selected according to the actual requirements of the process. For example, the bag filter throughput may be 60 tons/hour, with a filtration accuracy of up to 1 μm. Most of impurities in the circulating chilled water can be effectively removed by the bag filter in actual use, the water quality of the chilled water system is obviously improved, the heat exchange efficiency is improved, and meanwhile, the energy consumption and the operation cost are reduced. Furthermore, because the circulating chilled water is in closed circulation, the circulating water of the whole system can be filtered once in 2-3 days, and the use requirement is met. By monitoring the pressure change of the water outlet of the circulating pump 120, after the pressure difference reaches a limit value (normally 0.25MPa, when the pressure reaches 0.3MPa, the filter bag is replaced), the replacement frequency of the filter bag is determined to be once a month according to the actual operation condition.

The subsequent processing unit 30 is used for performing subsequent processing on the gel precursor to obtain a fiber finished product. The post-treatment unit 30 may perform post-treatment of the gel strands using methods and apparatus known in the art. In some embodiments, the subsequent processing unit 30 may include a stretching unit 31, a cleaning unit 32, a drying unit 33, and a winding unit 34 for stretching and setting, cleaning, drying, and winding the gel strand, respectively.

The preferred embodiments and preferred features of the chilled water circulation system provided in the present invention are as described above, and are also applicable to the fiber production system of the present invention.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of various equivalent modifications or replacements within the technical scope of the present invention, and these modifications or replacements should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A chilled water circulation system is used for a fiber production system and is characterized in that the chilled water circulation system comprises a cooling device, a circulating pump and a refrigerator which are sequentially connected through a main circulation pipeline to form a chilled water closed circulation loop, wherein,

the chilled water closed circulation loop further comprises a filter, and a feed inlet and a discharge outlet of the filter are communicated with the main circulation pipeline through bypass pipelines respectively so as to perform bypass filtration type filtration treatment on the chilled water.

2. The chilled water circulation system of claim 1, wherein the filter is disposed between the circulation pump and the freezer.

3. The chilled water circulation system of claim 1, wherein a pressure monitoring device is provided at an outlet end of the circulation pump.

4. The chilled water circulation system of claim 1, wherein the filter is a bag filter.

5. The chilled water circulation system according to claim 4, wherein the bag filter has a filtration precision of 0.1-5 μm.

6. The chilled water circulation system according to any one of claims 1 to 5, wherein the chilled water circulation system is used for a spinning unit of the fiber production system, and the cooling device is a chilled water tank.

7. The chilled water circulation system according to claim 6, wherein the chilled water tank comprises a plurality of sets of water inlets and water outlets, and the freezer and the circulation pump are connected between each set of water inlets and water outlets through the main circulation pipe, respectively, to form a plurality of the chilled water closed circulation loops;

wherein the filter is connected to at least one of the chilled water closed circulation loops.

8. The chilled water circulation system of claim 7, wherein the filter is connected to each of the chilled water closed circulation loops.

9. The chilled water circulation system of claim 1, further comprising a water replenishing device, a water outlet of the water replenishing device being connected with a water inlet of the freezer.

10. A fiber production system, characterized in that it comprises a chilled water circulation system according to any of claims 1-9.