Cooling water heat exchange system

Abstract

The utility model discloses a cooling water heat exchange system which comprises a chilled water system, a plate heat exchanger, a process cooling water system and a tap water system. A chilled water inlet pipe of the chilled water system and a tap water pipe of the tap water system are connected with a primary side water inlet pipe of the plate heat exchanger; the chilled water system and the tap water pipe of the tap water system are connected with a primary side water return pipe of the plate heat exchanger; a process cooling water inlet pipe of the process cooling water system is connected with a secondary side water inlet pipe of the plate heat exchanger, and a process cooling water return pipe of the process cooling water system is connected with a secondary side water return pipe of the plate heat exchanger. According to the cooling water heat exchange system, the tap water system is additionally arranged on the basis that the chilled water system is adopted for cooling water heat exchange, the tap water pipe is connected with the plate heat exchanger, chilled water or tap water can be intelligently selected to be used as a heat exchange medium, and energy consumption in the cooling water heat exchange process is effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of cooling water, in particular to a cooling water heat exchange system. Background Art

[0002] The cooling water system refers to a water supply system that uses cooling water for heat exchange, cooling, and recycling. It is an important facility widely used in industrial and daily cooling needs. In factories in conventional production industries, the cooling water system in process equipment usually uses a chilled water system to pump chilled water into the secondary side of the PCW (Process Cooling Water) plate heat exchanger during heat exchange, and exchanges heat with the PCW plate heat exchanger to take away the heat of the process cooling water, thereby achieving cooling of the process equipment.

[0003] However, the chilled water required in the above heat exchange process is produced by a refrigerator in a chilled water system, and the production process consumes a large amount of electric energy, resulting in high energy consumption in the cooling water heat exchange process. Utility Model Content

[0004] Therefore, the technical problem to be solved by the utility model is to overcome the problem that only a chilled water system is used for cooling water heat exchange in the prior art, resulting in high energy consumption in the cooling water heat exchange process, thereby providing a cooling water heat exchange system.

[0005] The utility model provides a cooling water heat exchange system, which includes a chilled water system, a plate heat exchanger, a process cooling water system and a tap water system;

[0006] The chilled water inlet pipe of the chilled water system and the tap water pipe of the tap water system are connected to the primary side inlet pipe of the plate heat exchanger, and the chilled water return pipe of the chilled water system and the tap water pipe of the tap water system are connected to the primary side return pipe of the plate heat exchanger;

[0007] The process cooling water inlet pipe of the process cooling water system is connected to the secondary side inlet pipe of the plate heat exchanger, and the process cooling water return pipe of the process cooling water system is connected to the secondary side return pipe of the plate heat exchanger.

[0008] The utility model adopts a chilled water system to transport chilled water to the plate heat exchanger, and at the same time adds a tap water system, so that the tap water pipes of the tap water system are respectively connected to the water inlet pipe and the water return pipe on the primary side of the plate heat exchanger. It can intelligently select to use chilled water or tap water as the heat exchange medium, effectively reducing the energy consumption of the cooling water heat exchange process, improving the efficiency of the cooling water heat exchange, and ensuring the stable operation of the process equipment and the production quality.

[0009] In an optional embodiment, the system further comprises a raw water tank, which is used to produce pure water based on tap water transported by a tap water pipe.

[0010] The utility model takes into account that the raw water pool needs to be heated to increase the output of pure water during pure water production, and therefore transports tap water to the raw water pool for pure water production. When the tap water participates in the heat exchange of cooling water, the tap water carries the heat of the process cooling water and is transported to the raw water pool, which can increase the water temperature, thereby saving energy consumption in the heating process.

[0011] In an optional embodiment, a bypass pipeline is provided between the tap water pipe and the raw water tank.

[0012] The utility model uses a bypass pipeline to enable the raw water pool to directly obtain water from the tap water system, or to transport other mixed water sources to the raw water pool as needed, thereby enhancing the ability to flexibly allocate water sources under different working conditions.

[0013] In an optional embodiment, the system further comprises a first stop valve, a second stop valve, a third stop valve, a fourth stop valve and a fifth stop valve, any of which connects the pipeline when opened and disconnects the pipeline when closed;

[0014] The bypass pipeline is equipped with a first stop valve;

[0015] A second stop valve is installed in the pipeline between the chilled water inlet pipe and the primary side inlet pipe, and a third stop valve is installed in the pipeline between the chilled water return pipe and the primary side return pipe;

[0016] A fourth stop valve is installed in the pipeline between the tap water pipe and the primary side water inlet pipe, and a fifth stop valve is installed in the pipeline between the tap water pipe and the primary side water return pipe.

[0017] The utility model can flexibly control the water source participating in the heat exchange in the cooling water heat exchange process by installing stop valves on multiple pipelines, thereby improving the efficiency and flexibility of the cooling water heat exchange.

[0018] In an optional implementation, the initial states of the first stop valve, the second stop valve, the third stop valve, the fourth stop valve and the fifth stop valve are closed.

[0019] The utility model sets the initial setting state of the stop valve to the closed state, which can ensure that the water source between the pipelines is cut off during non-operation or system maintenance, avoiding hydraulic shock and system damage caused by accidental leakage or misoperation, thereby enhancing the safety of the system.

[0020] In an optional embodiment, when the ambient temperature is lower than a first preset threshold and the temperature difference between the chilled water temperature of the chilled water system and the tap water temperature of the tap water system is less than a second preset threshold, the first stop valve is closed, and the second stop valve, the third stop valve, the fourth stop valve and the fifth stop valve are opened, so that the tap water transported through the tap water pipe, the chilled water transported through the chilled water inlet pipe and the process cooling water transported through the process cooling water inlet pipe are heat exchanged, and the process cooling water after the heat exchange is transported to the process cooling water system through the secondary side return pipe and the process cooling water return pipe, the chilled water after the heat exchange is transported to the chilled water system through the primary side return pipe and the chilled water return pipe, and the tap water after the heat exchange is transported to the raw water tank through the tap water pipe.

[0021] The utility model can achieve the same effect when heat exchange is performed when the ambient temperature is lower than a first preset threshold value and the temperature difference between the two water sources is less than a second preset threshold value, that is, the temperature difference between the two water sources is not large. At this time, the stop valve is precisely controlled to switch to using tap water as the heat exchange medium, which solves the problem of high energy consumption caused by heat exchange using chilled water manufactured by a refrigerator in the related technology. The heat exchange medium is adjusted by combining the ambient temperature and the temperature difference between the two water sources, which saves energy consumption in the cooling water heat exchange process. At the same time, the cooling water heat exchange ensures that the process cooling water is always kept within a certain temperature range, thereby ensuring the stable operation of the process equipment and the production quality.

[0022] In an optional embodiment, when the ambient temperature is higher than the third preset threshold, the fourth stop valve and the fifth stop valve are closed, and the first stop valve, the second stop valve and the third stop valve are opened, so that the chilled water transported through the cooling water inlet pipe and the process cooling water transported through the process cooling water inlet pipe are heat exchanged, and the process cooling water after the heat exchange is transported to the process cooling water system through the secondary side return pipe and the process cooling water return pipe, and the chilled water after the heat exchange is transported to the chilled water system through the primary side return pipe and the chilled water return pipe, and the tap water system transports tap water to the raw water tank through the tap pipe.

[0023] The utility model ensures that the process cooling water can be cooled quickly, improves the efficiency of cooling water heat exchange, and ensures the stable operation and production quality of process equipment by adjusting the stop valve to use chilled water to effectively cool the process cooling water when the ambient temperature is higher than the third preset threshold value.

[0024] In an optional embodiment, when the ambient temperature is within a preset temperature range, the first stop valve, the second stop valve, the fourth stop valve and the fifth stop valve are opened, and the third stop valve is closed, so that the chilled water transported through the cooling water inlet pipe, the tap water transported through the tap water pipe and the process cooling water transported through the process cooling water inlet pipe are heat exchanged, and the process cooling water after the heat exchange is transported to the process cooling water system through the secondary side return pipe and the process cooling water return pipe, and the tap water and chilled water after the heat exchange are transported to the raw water tank through the tap water pipe.

[0025] The utility model improves the heat exchange efficiency and reduces the energy consumption of relying solely on chilled water for cooling when the ambient temperature is within a preset temperature range by using chilled water and tap water for heat exchange, thereby reducing the operating cost. The tap water and chilled water after the heat exchange are transported to the raw water pool together, thereby increasing the water temperature of the raw water pool and accelerating the speed of producing pure water in the raw water pool. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are some implementation methods of the utility model. For ordinary technicians in this field, the detailed technical solutions of this embodiment can be known based on these drawings without paying any creative work.

[0027] Figure 1 It is a connection structure block diagram of the cooling water heat exchange system provided by an embodiment of the utility model.

[0028] Description of Reference Numerals

[0029] 1. Chilled water system; 101. Chilled water inlet pipe; 102. Chilled water return pipe; 2. Plate heat exchanger; 201. Primary side inlet pipe; 202. Primary side return pipe; 203. Secondary side inlet pipe; 204. Secondary side return pipe; 3. Process cooling water system; 301. Process cooling water inlet pipe; 302. Process cooling water return pipe; 4. Tap water system; 401. Tap water pipe; 5. Raw water tank; 6. Bypass pipeline; 7. First stop valve; 8. Second stop valve; 9. Third stop valve; 10. Fourth stop valve; 11. Fifth stop valve. DETAILED DESCRIPTION

[0030] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] In the description of the present invention, it should be noted that the terms "first", "second" and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0032] The cooling water system refers to a water supply system that cools and recycles cooling water for heat exchange. It is an important facility widely used in industrial and daily cooling needs. In the relevant technology, the chilled water system usually pumps chilled water into the primary side of the PCW plate heat exchanger, exchanges heat with the PCW plate, and takes away the heat of the process cooling water to achieve cooling water heat exchange. However, the chilled water required in the above heat exchange process consumes a lot of electric energy in its manufacturing process, and the heat emitted by the process equipment is relatively reduced, and no efficient cooling effect is required. Therefore, only using the chilled water of the chilled water system for heat exchange has the problem of high energy consumption. When the temperature of the tap water is close to the temperature of the chilled water, the utility model uses tap water instead of chilled water for cooling water heat exchange to save the output of chilled water and effectively reduce energy consumption. At the same time, after the cooling water heat exchange, the tap water carries heat and is input into the raw water pool for making pure water, and the water source in the raw water pool is heated, which effectively reduces the energy consumption of making pure water.

[0033] The utility model provides a cooling water heat exchange system, such as Figure 1 As shown, the system includes a chilled water system 1, a plate heat exchanger 2, a process cooling water system 3 and a tap water system 4; the chilled water inlet pipe 101 of the chilled water system 1 and the tap water pipe 401 of the tap water system 4 are connected to the primary side inlet pipe 201 of the plate heat exchanger 2, and the chilled water return pipe 102 of the chilled water system 1 and the tap water pipe 401 of the tap water system 4 are connected to the primary side return pipe 202 of the plate heat exchanger 2; the process cooling water inlet pipe 301 of the process cooling water system 3 is connected to the secondary side inlet pipe 203 of the plate heat exchanger 2, and the process cooling water return pipe 302 of the process cooling water system 3 is connected to the secondary side return pipe 204 of the plate heat exchanger 2.

[0034] Specifically, the cooling water system 1 includes a refrigerator for making chilled water, which is used to provide chilled water. The primary side of the plate heat exchanger 2 is usually the active provider or receiver of heat, while the secondary side is the port that uses these heat changes to achieve specific cooling or heating purposes according to process requirements. The plates of the plate heat exchanger 2 are used for efficient and isolated heat transfer, which ensures that different media will not mix while achieving effective energy conversion. The process cooling water system 3 is connected to the process equipment and is used to transport the process cooling water carrying the heat of the process equipment to the plate heat exchanger 2 to obtain the cooled process cooling water for cooling the process equipment. The tap water system 4 is used to provide a tap water source. The cooling water heat exchange process realized by the above system is: the process cooling water system 3 transports the process cooling water carrying the heat of the process equipment to the plate heat exchanger 2 through the pipeline between the process cooling water inlet pipe 301 and the secondary side inlet pipe 203. If the chilled water of the chilled water system 1 is used to participate in the cooling water heat exchange process, the chilled water is transported to the plate heat exchanger 2 through the pipeline between the chilled water inlet pipe 101 and the primary side inlet pipe 201. If the tap water of the tap water system 4 is used to participate in the cooling water heat exchange process, the tap water is transported to the plate heat exchanger 2 through the pipeline between the tap water pipe 401 and the primary side inlet pipe 201. In the plate heat exchanger 2, since the temperature of the chilled water and / or tap water is lower than that of the process cooling water, through the heat exchange between the chilled water and / or tap water and the process cooling water, the process cooling water releases heat and the chilled water and / or tap water absorb heat to achieve the cooling of the process cooling water. After the heat exchange is completed, the cooled process cooling water returns to the process cooling water system 3 through the loop between the secondary side return pipe 204 and the process cooling water return pipe 302 to achieve the cooling of the process equipment. If the chilled water of the chilled water system 1 is used to participate in the cooling water heat exchange process, the chilled water whose temperature rises after absorbing heat returns to the chilled water system 1 through the primary side return pipe 202 and the chilled water return pipe 102. Similarly, if the tap water of the tap water system 4 is used to participate in the cooling water heat exchange process, the tap water whose temperature rises after absorbing heat is transported through the primary side return pipe 202 and the tap water pipe 401. Optionally, only the chilled water of the chilled water system 1, only the tap water of the tap water system 4, or the chilled water system 1 and the tap water system 4 can be used in combination to achieve the above cooling water heat exchange process. By using chilled water and / or tap water as a heat exchange medium to perform heat exchange with process cooling water, the heat exchange medium can be flexibly selected to reduce energy consumption and improve efficiency in the cooling water heat exchange process.

[0035] In one embodiment, if Figure 1 As shown, the system further includes a raw water tank 5 , which is used to produce pure water based on tap water transported by a tap water pipe 401 .

[0036] Specifically, when the tap water system 4 does not participate in the above heat exchange process, the tap water is directly transported to the raw water tank 5 through the tap water pipe 401 to produce pure water. When the tap water system 4 participates in the above heat exchange process, considering that the raw water tank 5 needs to be heated to increase the output of pure water when producing pure water, the tap water with a higher temperature after heat exchange is transported to the raw water tank 5 for pure water production, which can increase the water temperature in the raw water tank 5, thereby saving energy consumption in the heating process.

[0037] In one embodiment, if Figure 1 As shown, a bypass pipeline 6 is arranged between the tap water pipe 401 and the raw water tank 5 .

[0038] Specifically, the bypass pipeline 6 refers to an auxiliary pipeline arranged in various fluid delivery systems such as water system, steam system, oil system, etc., which bypasses the main processing unit, such as pump, heat exchanger, filter, etc. In the present utility model, the bypass pipeline 6 is used to bypass the plate heat exchanger 2, so that the raw water tank 5 can directly obtain water from the tap water system 4, or transport other mixed water sources to the raw water tank 5 as needed, thereby enhancing the flexible allocation capability of water sources under different working conditions.

[0039] In one embodiment, if Figure 1 As shown, the system also includes a first stop valve 7, a second stop valve 8, a third stop valve 9, a fourth stop valve 10 and a fifth stop valve 11. Any stop valve connects the pipeline when it is opened and disconnects the pipeline when it is closed; the bypass pipeline 6 is installed with the first stop valve 7; the pipeline between the chilled water inlet pipe 101 and the primary side inlet pipe 201 is installed with the second stop valve 8, and the pipeline between the chilled water return pipe 102 and the primary side return pipe 202 is installed with the third stop valve 9; the pipeline between the tap water pipe 401 and the primary side inlet pipe 201 is installed with the fourth stop valve 10, and the pipeline between the tap water pipe 401 and the primary side return pipe 202 is installed with the fifth stop valve 11.

[0040] Specifically, by controlling the opening or closing of the first stop valve 7, the raw water pool 5 can be controlled to obtain different water sources. By controlling the opening or closing of the second stop valve 8 and the third stop valve 9, it is possible to control whether the chilled water of the chilled water system 1 participates in the heat exchange process of the plate heat exchanger 2. By controlling the fourth stop valve 10 and the fifth stop valve 11, it is possible to control whether the tap water of the tap water system 4 participates in the heat exchange process of the plate heat exchanger 2. By installing stop valves on multiple pipelines, the water sources participating in the heat exchange process of the cooling water can be flexibly controlled, thereby improving the efficiency and flexibility of the cooling water heat exchange.

[0041] In one embodiment, the initial states of the first stop valve 7 , the second stop valve 8 , the third stop valve 9 , the fourth stop valve 10 and the fifth stop valve 11 are closed states.

[0042] Specifically, by setting the initial state of the stop valve to the closed state, it can be ensured that the water source between the pipelines is cut off during non-operation periods or system maintenance, avoiding hydraulic shock and system damage caused by accidental leakage or misoperation, thereby enhancing the safety of the system.

[0043] In one embodiment, when the ambient temperature is lower than the first preset threshold and the temperature difference between the chilled water temperature of the chilled water system 1 and the tap water temperature of the tap water system 4 is less than the second preset threshold, the second stop valve 8 and the third stop valve 9 are closed, and the first stop valve 7, the fourth stop valve 10 and the fifth stop valve 11 are opened, so that the tap water transported through the tap water pipe 401 and the process cooling water transported through the process cooling water inlet pipe 301 are heat exchanged, and the process cooling water after the heat exchange is transported to the process cooling water system 3 through the secondary side return pipe 204 and the process cooling water return pipe 302, and the tap water after the heat exchange is transported to the raw water tank 5 through the tap water pipe 401.

[0044] Specifically, the ambient temperature indicates the temperature of the environment in which the system is located. The first preset threshold value may be -1°C, 5°C or 10°C, etc., and the present invention is not limited to this. The second preset threshold value may be 3°C, 4°C or 5°C, etc., and the present invention is not limited to this. If the ambient temperature is lower than the first preset threshold value, it may be winter at present, and if the temperature difference between the chilled water temperature and the tap water temperature is less than the second preset threshold value, that is, the temperature difference between the two media is not much at this time, a similar effect can be achieved during heat exchange. When chilled water is used to cool the process equipment, the refrigerator needs to continuously produce chilled water so that the cooling water heat exchange process can continue, and the chilled water production process consumes a lot of electrical energy, which makes the energy consumption of the cooling water heat exchange process high. Therefore, tap water can be used instead of chilled water for cooling water heat exchange to save energy consumption in the chilled water manufacturing process, that is, the fourth stop valve 10 and the fifth stop valve 11 are opened to enable the tap water pipe 401 to communicate with the primary side water inlet pipe 201 and the primary side water return pipe 202 of the plate heat exchanger 2, and the second stop valve 8 and the third stop valve 9 are closed at the same time, so that the chilled water cannot be delivered to the plate heat exchanger 2. In addition, the first stop valve 7 is opened to allow the tap water to be delivered to the raw water tank 5 through the bypass pipeline 6. The tap water after heat exchange is also delivered to the raw water tank 5 through the pipeline between the tap water pipe 401 and the raw water tank 5, which speeds up the production of pure water and saves energy consumption. By combining the ambient temperature and the temperature difference between the two water sources to adjust the heat exchange medium, the energy consumption of the cooling water heat exchange process is saved. At the same time, the process cooling water is ensured to always remain within a certain temperature range through cooling water heat exchange, thereby ensuring the stable operation and production quality of the process equipment.

[0045] In one embodiment, when the ambient temperature is higher than the third preset threshold, the fourth stop valve 10 and the fifth stop valve 11 are closed, and the first stop valve 7, the second stop valve 8 and the third stop valve 9 are opened, so that the chilled water transported through the chilled water inlet pipe 101 and the process cooling water transported through the process cooling water inlet pipe 301 are heat exchanged, and the process cooling water after the heat exchange is transported to the process cooling water system 3 through the secondary side return pipe 204 and the process cooling water return pipe 302, and the chilled water after the heat exchange is transported to the chilled water system 1 through the primary side return pipe 202 and the chilled water return pipe 102, and the tap water system 4 transports tap water to the raw water tank 5 through the tap pipe 401.

[0046] Specifically, the third preset threshold value may be 20°C, 25°C or 30°C, etc., and the present invention does not impose any restrictions on this. When the ambient temperature is higher than the third preset threshold value, it may be summer. Due to the increase in ambient temperature in summer, tap water is easily heated by the outside during the process of being transported to the plate heat exchanger 2, causing its temperature to rise, which may approach or exceed the temperature of the process equipment that needs to be cooled, thereby failing to effectively perform heat exchange. Therefore, only the chilled water system 1 can be used for cooling water heat exchange to ensure the speed and effectiveness of cooling the process equipment, that is, the second stop valve 8 and the third stop valve 9 are opened, so that the chilled water inlet pipe 101 can be connected to the primary side inlet pipe 201 of the plate heat exchanger 2, and the chilled water return pipe 102 can be connected to the primary side return pipe 202, and the fourth stop valve 10 and the fifth stop valve 11 are closed at the same time, so that tap water cannot be transported to the plate heat exchanger 2, and the chilled water after heat exchange cannot be transported to the raw water tank 5. In addition, the first stop valve 7 is opened so that tap water can be transported to the raw water tank 5 through the bypass pipeline 6 to produce pure water. When the ambient temperature is higher than the third preset threshold, the process cooling water is effectively cooled by using chilled water by adjusting the stop valve, thereby ensuring that the process cooling water can be cooled quickly, improving the efficiency of cooling water heat exchange, and ensuring the stable operation of the process equipment and production quality.

[0047] In one embodiment, when the ambient temperature is within a preset temperature range, the first stop valve 7, the second stop valve 8, the fourth stop valve 10 and the fifth stop valve 11 are opened, and the third stop valve 9 is closed, so that the chilled water transported through the chilled water inlet pipe 101, the tap water transported through the tap water pipe 401 and the process cooling water transported through the process cooling water inlet pipe 301 are heat exchanged, and the process cooling water after the heat exchange is transported to the process cooling water system 3 through the secondary side return pipe 204 and the process cooling water return pipe 302, and the tap water and chilled water after the heat exchange are transported to the raw water tank 5 through the tap water pipe 401.

[0048] Specifically, the preset temperature range can be [10℃, 20℃], [15℃, 20℃] or [20℃, 25℃], etc. It may be spring or autumn at present. At this time, using only tap water as the heat exchange medium may not meet the cooling requirements due to its relatively high temperature, while relying entirely on chilled water may cause high energy consumption. Therefore, the chilled water system 1 and the tap water system 4 can be mixed for cooling water heat exchange to improve the cooling efficiency of the process equipment while reducing energy consumption, that is, open the second stop valve 8, the fourth stop valve 10 and the fifth stop valve 11, so that the chilled water inlet pipe 101 and the tap water pipe 401 can be connected to the primary side inlet pipe 201 of the plate heat exchanger 2, respectively, and the chilled water return pipe 102 and the tap water pipe 401 can be connected to the primary side return pipe 202, respectively. At the same time, close the third stop valve 9 and open the first stop valve 7 to allow the tap water to be transported to the raw water tank 5 through the bypass pipe 6, and the tap water after heat exchange and the chilled water after heat exchange are transported to the raw water tank 5 through the pipeline between the tap water pipe 401 and the raw water tank 5 for pure water production, thereby speeding up the production of pure water and saving energy consumption. By using chilled water and tap water for heat exchange at the same time when the ambient temperature is within the preset temperature range, the heat exchange efficiency is improved, and the energy consumption of relying solely on chilled water for cooling is reduced, thereby reducing the operating cost. The tap water and chilled water after heat exchange are transported to the raw water tank 5 together, which increases the water temperature of the raw water tank 5 and speeds up the production of pure water in the raw water tank 5.

[0049] The utility model adopts a chilled water system to transport chilled water to the plate heat exchanger, and at the same time adds a tap water system, so that the tap water pipes of the tap water system are respectively connected to the water inlet pipe and the water return pipe on the primary side of the plate heat exchanger. It can intelligently select to use chilled water or tap water as the heat exchange medium, effectively reducing the energy consumption of the cooling water heat exchange process, improving the efficiency of the cooling water heat exchange, and ensuring the stable operation of the process equipment and the production quality.

[0050] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention of the utility model.

Claims

1. A cooling water heat exchange system, characterized in that: The system includes a chilled water system, a plate heat exchanger, a process cooling water system and a tap water system; The chilled water inlet pipe of the chilled water system and the tap water pipe of the tap water system are connected to the primary side inlet pipe of the plate heat exchanger, and the chilled water return pipe of the chilled water system and the tap water pipe of the tap water system are connected to the primary side return pipe of the plate heat exchanger; The process cooling water inlet pipe of the process cooling water system is connected to the secondary side inlet pipe of the plate heat exchanger, and the process cooling water return pipe of the process cooling water system is connected to the secondary side return pipe of the plate heat exchanger.

2. The cooling water heat exchange system according to claim 1, characterized in that: The system further comprises a raw water tank for producing pure water based on the tap water transported by the tap water pipe.

3. The cooling water heat exchange system according to claim 2, characterized in that: A bypass pipeline is arranged between the tap water pipe and the raw water pool.

4. The cooling water heat exchange system according to claim 3, characterized in that: The system further comprises a first stop valve, a second stop valve, a third stop valve, a fourth stop valve and a fifth stop valve, any of which connects the pipeline when opened and disconnects the pipeline when closed; The bypass pipeline is provided with the first stop valve; The pipeline between the chilled water inlet pipe and the primary side inlet pipe is equipped with the second stop valve, and the pipeline between the chilled water return pipe and the primary side return pipe is equipped with the third stop valve; The fourth stop valve is installed in the pipeline between the tap water pipe and the primary-side water inlet pipe, and the fifth stop valve is installed in the pipeline between the tap water pipe and the primary-side water return pipe.

5. The cooling water heat exchange system according to claim 4, characterized in that: Initial states of the first stop valve, the second stop valve, the third stop valve, the fourth stop valve, and the fifth stop valve are closed.

6. The cooling water heat exchange system according to claim 4, characterized in that: When the ambient temperature is lower than the first preset threshold and the temperature difference between the chilled water temperature of the chilled water system and the tap water temperature of the tap water system is less than the second preset threshold, the second stop valve and the third stop valve are closed, and the first stop valve, the fourth stop valve and the fifth stop valve are opened, so that the tap water transported through the tap water pipe and the process cooling water transported through the process cooling water inlet pipe are heat exchanged, and the process cooling water after the heat exchange is transported to the process cooling water system through the secondary side return pipe and the process cooling water return pipe, and the tap water after the heat exchange is transported to the raw water tank through the tap water pipe.

7. The cooling water heat exchange system according to claim 6, characterized in that: When the ambient temperature is higher than the third preset threshold, the fourth stop valve and the fifth stop valve are closed, and the first stop valve, the second stop valve and the third stop valve are opened, so that the chilled water transported through the cooling water inlet pipe and the process cooling water transported through the process cooling water inlet pipe are heat exchanged, and the process cooling water after the heat exchange is transported to the process cooling water system through the secondary side return pipe and the process cooling water return pipe, and the chilled water after the heat exchange is transported to the chilled water system through the primary side return pipe and the chilled water return pipe, and the tap water system transports tap water to the raw water tank through the tap pipe.

8. The cooling water heat exchange system according to claim 6, characterized in that: When the ambient temperature is within the preset temperature range, the first stop valve, the second stop valve, the fourth stop valve and the fifth stop valve are opened, and the third stop valve is closed, so that the chilled water transported through the cooling water inlet pipe, the tap water transported through the tap water pipe and the process cooling water transported through the process cooling water inlet pipe are heat exchanged, and the process cooling water after the heat exchange is transported to the process cooling water system through the secondary side return pipe and the process cooling water return pipe, and the tap water and chilled water after the heat exchange are transported to the raw water tank through the tap water pipe.

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