Pure water production system

Abstract

The embodiment of the utility model provides a pure water production system, which relates to the technical field of water production and comprises heat exchange equipment and a water production subsystem, the heat exchange equipment comprises a first channel and a second channel; the first end of the first channel is connected with an external water supply port, and the second end of the first channel is connected with a water inlet of the water production subsystem; the first end of the second channel is connected with a heat source outlet of external heat source supply equipment, and the second end of the second channel is connected with a heat source inlet of the heat source supply equipment; wherein the heat source flowing through the second channel is used for heating water flowing through the first channel, and the water production subsystem carries out pure water production based on the inflowing water. Through the system, the production efficiency of pure water can be effectively improved.

Description

Technical Field

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

[0002] Pure water refers to water without impurities and plays an important role in the fields of biology, chemistry, and chemical engineering. Currently, pure water can be roughly divided into first-stage reverse osmosis (RO) water and second-stage RO water.

[0003] In the related art, the water production system of a pure water station uses tap water as raw water for the production of pure water. Due to the characteristics of the RO membrane in the water production system, at the same pressure, when the inlet water temperature drops by 1 degree Celsius, its water production can decrease by 3% to 4%. Conversely, when the inlet water temperature rises by 1 degree Celsius, the water production increases by 3% to 4% accordingly. Therefore, to ensure the water production of pure water, the water production system has certain requirements for the inlet water temperature.

[0004] Since the water temperature of tap water is usually about 10 degrees Celsius, hot water generated by a heating boiler is usually used to heat the tap water through a plate heat exchanger. However, the heating boiler is affected by seasons and has poor heat source stability, resulting in low water production efficiency of the water production system. Summary of the Utility Model

[0005] An embodiment of the utility model provides a pure water production system, which can effectively improve the water production efficiency of the water production system.

[0006] In a first aspect, an embodiment of the utility model provides a pure water production system, including: a heat exchange device and a water production subsystem; the heat exchange device includes a first channel and a second channel;

[0007] The first end of the first channel is connected to an external water supply port, and the second end of the first channel is connected to the water inlet of the water production subsystem;

[0008] The first end of the second channel is connected to the heat source outlet of an external heat source supply device, and the second end of the second channel is connected to the heat source outlet of the heat source supply device;

[0009] Wherein, the heat source flowing through the second channel is used to heat the water flowing through the first channel, and the water production subsystem produces pure water based on the inflowing water.

[0010] In some embodiments, the pure water production system further includes: a water storage device;

[0011] The second end of the first channel is connected to the water inlet of the water storage device, the water outlet of the water storage device is connected to the water inlet of the water production subsystem, and the water inlet of the water storage device is arranged above the water outlet of the water storage device.

[0012] In some embodiments, the pure water production system further includes a purification device;

[0013] The purification device is disposed at the water inlet of the water storage device, and the purification device is configured to purify the water quality of the water flowing into the water storage device.

[0014] In some embodiments, the pure water production system further includes a circulation water pump;

[0015] The first end of the circulation water pump is connected to the water outlet of the water storage device, and the second end of the circulation water pump is connected to the water inlet of the water production subsystem.

[0016] In some embodiments, the pure water production system further includes a pretreatment subsystem; the pretreatment subsystem includes a raw water tank, a raw water pump, and a filtering device;

[0017] The water inlet of the raw water tank is connected to the second end of the circulation water pump, and the water outlet of the raw water tank is connected to the first end of the raw water pump;

[0018] The second end of the raw water pump is connected to the first end of the filtering device, and the second end of the filtering device is connected to the water inlet of the water production subsystem.

[0019] In some embodiments, the raw water tank includes a first water inlet and a second water inlet, a switch valve is further disposed at the second water inlet, and the raw water tank is further provided with a control device, a water level detection device, and / or a water temperature detection device;

[0020] The first water inlet is connected to the second end of the circulation water pump, and the second water inlet is connected to the external water supply port;

[0021] The control device is connected to the water level detection device and / or the water temperature detection device;

[0022] The control device controls the switch valve to replenish water to the raw water tank based on the detection results of the water level detection device and / or the water temperature detection device.

[0023] In some embodiments, the control device is integrated in the switch valve.

[0024] In some embodiments, the first channel includes a first sub-channel and a second sub-channel; the first sub-channel is disposed above the second channel, and the second sub-channel is disposed below the second channel;

[0025] A spray pump is disposed at the water outlet of the first sub-channel, and a water collecting tray is disposed at the water inlet of the second sub-channel;

[0026] The water flowing through the first sub-channel is sprayed onto the second channel by the spray pump, falls into the water collection tray, and flows into the water storage device through the water outlet of the second sub-channel.

[0027] In some embodiments, there are multiple heat exchange devices;

[0028] The second end of the first channel of each heat exchange device is connected to the water inlet of the water storage device.

[0029] In some embodiments, the heat exchange device is a pump cooling tower;

[0030] The heat source produced by the heat source supply device is water.

[0031] The pure water production system provided by the embodiments of the present invention includes: a heat exchange device and a water production subsystem; the heat exchange device includes a first channel and a second channel; the first end of the first channel is connected to an external water supply port, and the second end of the first channel is connected to the water inlet of the water production subsystem; the first end of the second channel is connected to the heat source outlet of an external heat source supply device, and the second end of the second channel is connected to the heat source outlet of the heat source supply device; wherein, the heat source flowing through the second channel is used to heat the water flowing through the first channel, and the water production subsystem produces pure water based on the inflowing water. Through the above system, after the water entering the water production subsystem passes through the first channel of the heat exchange device, it is heated by the stable heat source flowing through the second channel of the heat exchange device and then flows into the water production subsystem, which can effectively improve the production efficiency of pure water. Description of the Drawings

[0032] Figure 1 is a schematic diagram of the process of existing pure water production;

[0033] Figure 2 is a structural schematic diagram of a pure water production system provided by the present invention Figure 1 ;

[0034] Figure 3 is a structural schematic diagram of a pure water production system provided by the present invention Figure 2 ;

[0035] Figure 4 is a structural schematic diagram of a pure water production system provided by the present invention Figure 3 ;

[0036] Figure 5 is a structural schematic diagram of a pure water production system provided by the present invention Figure 4 ;

[0037] Figure 6 is a structural schematic diagram of a pure water production system provided by the present invention Figure 5 . Detailed implementation manners

[0038] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are some but not all of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0039] In the embodiments of the present utility model, terms such as "first" and "second" are used to distinguish identical or similar items with basically the same functions and effects, and do not limit their sequence. Those skilled in the art can understand that terms such as "first" and "second" do not limit the quantity and execution order, and "first", "second", etc. do not necessarily mean different.

[0040] It should be noted that in the embodiments of the present utility model, words such as "exemplary" or "for example" are used to represent examples, illustrations or explanations. Any embodiment or design solution described as "exemplary" or "for example" in the present utility model should not be construed as being more preferred or having more advantages than other embodiments or design solutions. Exactly, using words such as "exemplary" or "for example" is intended to present relevant concepts in a specific manner.

[0041] In addition, the terms "comprise" and "have" and any variations thereof are intended to cover but not exclude inclusion. For example, a product or device comprising a series of components does not necessarily have to be limited to those components clearly listed, but may include other components not clearly listed or inherent to these products or devices.

[0042] In the description of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "mount", "connect" and "couple" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection or an integral connection; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0043] Currently, the water production system of the pure water station uses tap water as the raw water, and after treatment, primary RO water and secondary RO water are produced for production use.

[0044] Figure 1 It is a schematic flow diagram for pure water production in a pure water station, as Figure 1As shown, the pure water station uses tap water as the water source for pure water production.

[0045] The pure water station receives tap water through the raw water tank as the raw water for pure water production, and supplies the raw water in the raw water tank to the plate heat exchanger through the raw water pump. The plate heat exchanger exchanges heat for the raw water with the heat source from the outside (for example, the hot water of the heating boiler), and raises the water temperature of the raw water. After the low-temperature hot water after heat exchange by the plate heat exchanger passes through the multi-media filter, it flows into the pure water production system. The pure water system performs multi-stage treatment on the incoming low-temperature hot water (for example, through RO membrane filtration) to obtain primary RO water and secondary RO water for production use. Among them, the raw water tank, the raw water pump, the plate heat exchanger and the multi-media filter can be called the pre-treatment system of the pure water production system.

[0046] Since the permeation flux of the RO membrane is affected by the temperature correction coefficient, for every 1°C increase in water temperature, the temperature correction coefficient increases by 1.03 times, and the RO membrane permeation flux rises by 3%. To improve the water production efficiency, the optimal working temperature of the RO membrane is 25°C (that is, the optimal water temperature when entering the pure water production system is 25°C).

[0047] However, tap water is at room temperature, with an average temperature of 10°C throughout the year. A stable heat source is required to heat the tap water above 25°C through the plate heat exchanger. Only when heating the boiler in the production plant area in winter can there be a heat source, and the boiler heating energy consumption is high, and there is no heat source in summer. This results in a low water production rate of the pure water system, wasting water and energy.

[0048] In view of this, the present utility model provides a pure water production system, which combines the cooling system of the production workshop with the current pure water production system. By connecting tap water to the external circulation of the cooling system, the tap water flowing through the external circulation cools the hot water in the internal circulation, thereby heating the tap water, and inputting the heated tap water into the pure water production system. Thus, the stability of the heat source is effectively ensured, and there is no need for a plate heat exchanger to heat the tap water, effectively improving the efficiency of pure water production.

[0049] The technical solution of the present utility model and how the technical solution of the present utility model solves the above technical problems will be described in detail below with specific embodiments. These several specific embodiments below can be implemented independently or in combination with each other, and the same or similar concepts or processes may not be repeated in some embodiments.

[0050] Figure 2 The structural schematic diagram of a pure water production system provided by an embodiment of the present utility model is as Figure 2 shown, including: a heat exchange device and a water production subsystem.

[0051] In some embodiments, the heat exchange device includes a first channel and a second channel.

[0052] The first end of the first channel is connected to an external water supply port, and the second end of the first channel is connected to the water inlet of the water purification subsystem. That is, the water from the external water supply interface flows into the water purification subsystem through the first channel of the heat exchange device. Among them, the water purification subsystem is similar to Figure 1 the structure of the water purification system shown, and is used to purify the incoming water to produce primary RO water and secondary RO water. Its specific structure can refer to the structure of the pure water purification system in the prior art, which will not be elaborated here. The water input from the external water supply interface can be tap water, groundwater, etc., and the embodiments of the present invention do not limit this.

[0053] The first end of the second channel is connected to the heat source outlet of an external heat source supply device, and the second end of the second channel is connected to the heat source inlet of the heat source supply device. That is, the heat source generated during the operation of the heat source supply device flows into the heat exchange device through the first end of the second channel, and after dissipating heat in the second channel, it returns to the heat source supply device through the second end of the second channel.

[0054] In some embodiments, the first channel and the second channel are deployed adjacent to each other. When the heat source generated by the heat source supply device flows through the second channel, due to heat transfer, the water flowing through the first channel can be heat-exchanged, and the heat of the heat source is transferred to the water in the first channel, thereby increasing the water temperature of the first channel and achieving the effect of heating the water entering the water purification subsystem, thereby improving the efficiency of pure water production.

[0055] Optionally, the flow direction of the water in the first channel can be opposite to the flow direction of the heat source in the second channel, so as to further improve the heating efficiency.

[0056] In some embodiments, the heat source supply device can be a process production workshop in the factory area, and the heat source can be process circulating water generated by the process production workshop.

[0057] In some embodiments, the heat exchange device can be a cooling device for the process circulating water generated by the process production workshop. For example, a Pumped Cooling Water (PCW) tower. Correspondingly, the second channel of the heat exchange device can be the internal circulation channel of the process circulating water generated by the process production workshop, and the first channel of the heat exchange device can be the external circulation channel of the process circulating water generated by the process production workshop.

[0058] The pure water production system provided by the embodiment of the present utility model combines a water production subsystem with a heat exchange device. By using the heat source supply device connected to the heat exchange device, a stable heat source for heating the inlet water for producing pure water can be obtained, which can effectively improve the production efficiency of pure water. At the same time, as a cooling device for the heat source supply device, the heat exchange device can also use the inlet water for producing pure water to cool the heat source generated by the heat source supply device, reducing the energy consumption for cooling performed by the heat exchange device.

[0059] Figure 3 is a structural schematic of the pure water production system provided by the embodiment of the present utility model Figure 2 , such as Figure 3 shown, the pure water production system further includes a water storage device.

[0060] Wherein, the second end of the first channel of the heat exchange device is connected to the water inlet of the water storage device, the water outlet of the water storage device is connected to the water inlet of the water production subsystem, and the water inlet of the water storage device is arranged above the water outlet of the water storage device.

[0061] Water from an external water supply interface flows into the first channel through the first end of the first channel of the heat exchange device, undergoes heat exchange in the first channel, obtains low-temperature hot water, and then flows into the water storage device through the second end of the first channel of the heat exchange device. After the low-temperature hot water stored in the water storage device reaches a certain water level, it flows into the water production subsystem from the water outlet of the water storage device and serves as the raw water for manufacturing pure water.

[0062] In some embodiments, the pure water production system further includes a purification device; the purification device is arranged at the water inlet of the water storage device, and the purification device is used to purify the water quality of the water flowing into the water storage device.

[0063] Since the first channel of the heat exchange device is the cooling external circulation channel of the process production workshop, there may be some impurities or pollutants in this channel. To improve the water quality, a purification device is arranged at the water inlet of the water storage device, which can purify the water quality of the low-temperature hot water flowing into the water storage device.

[0064] In some embodiments, the purification device can wrap the water inlet of the water storage device. For example, the purification device can be an oil-absorbing cotton. It should be understood that the purification device can also be other objects that can achieve the purification function, and the embodiment of the present utility model does not limit this.

[0065] In some embodiments, since the water pressure between the water storage device and the pure water system may be static pressure, for

[0066] The pure water production system further includes a circulation water pump; the first end of the circulation water pump is connected to the water outlet of the water storage device, and the second end of the circulation water pump is connected to the water inlet of the water production subsystem. The low-temperature hot water in the water storage device is transported to the water production subsystem through the circulation water pump.

[0067] Optionally, the water storage device may further include a control device and a water level detection device. After the low-temperature hot water stored in the water storage device reaches a certain water level (for example, at the 2 / 3 position), the control device can control the circulation water pump to start and transport the low-temperature hot water in the water storage device to the water production subsystem.

[0068] Figure 4 Structural schematic of the pure water production system provided by the embodiment of the present invention Figure 3 , as Figure 4 shown, the pure water production system further includes a pretreatment subsystem.

[0069] Among them, the pretreatment subsystem includes a raw water tank, a raw water pump, and a filtering device.

[0070] The water inlet of the raw water tank is connected to the second end of the circulation water pump, and the water outlet of the raw water tank is connected to the first end of the raw water pump; the second end of the raw water pump is connected to the first end of the filtering device, and the second end of the filtering device is connected to the water inlet of the water production subsystem.

[0071] As Figure 4 shown, the low-temperature hot water in the water storage device is input into the raw water tank through the circulation water pump, and the water in the raw water tank flows through the filtering device through the raw water pump and then enters the water production subsystem. Among them, the filtering device may be a multi-media filter as shown in Figure 1 .

[0072] In some embodiments, a control device and a water level detection device may also be provided in the raw water tank. After the low-temperature hot water stored in the raw water tank reaches a certain water level (for example, at the 2 / 3 position), the control device can control the raw water pump to start and transport the low-temperature hot water in the raw water tank to the filtering device for filtering treatment and then flow into the water production subsystem.

[0073] In some embodiments, the raw water tank includes a first water inlet and a second water inlet.

[0074] The first water inlet is connected to the second end of the water circulation pump, and the second water inlet is connected to the external water supply port.

[0075] As Figure 4As shown, the first water inlet of the original water tank is used to receive low-temperature hot water from the water storage device, and the second water inlet of the original water tank is used to connect to an external water supply port as a compensation water inlet in the original water tank. For example, when the water inlet demand in the water production subsystem exceeds the input of the water storage device, water can be added through the second water inlet.

[0076] In some embodiments, a switching valve is further provided at the second water inlet of the original water tank. When the control device in the original water tank determines that water compensation is required (for example, when the water level of the low-temperature hot water in the original water tank is low for a long time), the control device of the original water tank can control the switching valve to open to supplement water to the original water tank. Among them, the switching valve can be a solenoid valve, a ball valve, etc., and the embodiments of the present invention do not limit this.

[0077] In some embodiments, the control device can be integrally arranged with the switching valve or separately arranged from the switching valve, and the embodiments of the present application do not limit this.

[0078] In some embodiments, a water temperature detection device (such as a temperature sensor) is further provided in the original water tank to detect the water temperature in the original water tank.

[0079] The control device can obtain the temperature of the low-temperature hot water in the original water tank based on the water temperature detection device. When the water temperature is high, the control device can control the switching valve to open to supplement a water source with a lower temperature to reduce the temperature of the raw water and prevent the problem of reduced water production efficiency caused by too high a temperature.

[0080] Figure 5 Structural schematic of the pure water production system provided by the embodiments of the present invention Figure 4 as Figure 5 shown, the pure water production system further includes a spray pump and a water collecting tray.

[0081] Among them, the first channel includes a first sub-channel and a second sub-channel; the first sub-channel is arranged above the second channel, and the second sub-channel is arranged below the second channel; a spray pump is provided at the water outlet of the first sub-channel, and a water collecting tray is provided at the water inlet of the second sub-channel.

[0082] Water from the external water supply interface flows into the spray pump through the first sub-channel of the first channel, and the spray pump sprays the received water onto the second channel to cool the heat source in the second channel to complete the heat exchange of the sprayed water.

[0083] The water collecting tray at the water inlet of the second sub-channel below the second channel collects the low-temperature hot water that has completed heat exchange and fallen from the second channel, and is transported to the water storage device through the water outlet of the water collecting tray as the inlet water for the subsequent water production system. Through the design of the spray pump and the water collecting tray, the contact area between the water flowing through the first channel and the heat source in the second channel can be effectively increased, thereby improving the heat exchange efficiency of the water in the first channel.

[0084] Figure 6 Structural schematic of the pure water production system provided by the embodiment of the present invention Figure 5 , such as Figure 6 shown, there are multiple heat exchange devices in the pure water production system.

[0085] Among them, the second end of the first channel of each heat exchange device is connected to the water inlet of the water storage device, and the first end of the first channel of each heat exchange device is connected to the external water supply interface.

[0086] In some embodiments, the number of heat exchange devices can be determined according to the water volume demand of the water production subsystem and heating the water volume demand to the required target temperature (for example, 25 degrees Celsius). For example, if the water production subsystem requires m tons of hot water at 25 degrees Celsius per second, then based on the temperature and quantity of the heat source supplied by the heat source supply system, as well as the demand of the water production subsystem, calculate how many heat exchange devices need to be deployed.

[0087] In some embodiments, the devices and apparatuses in the above pure water production system are connected by pipelines. To reduce heat loss during the transportation of low-temperature hot water, the pipelines can also be heat-insulated, for example, heat-insulating measures such as wrapping heat-insulating cotton on the pipelines.

[0088] In summary, the pure water production system provided by the present invention combines the PCW cooling tower in the process workshop and the water production system, cancels the original plate heat exchanger for heating raw water, the water at the external water supply interface directly enters the PCW cooling tower external circulation system, cools down and takes away the heat from the high-temperature process circulating water generated in the process workshop through the internal circulation system, and the low-temperature hot water generated by the external circulation system is directly transported to the water production subsystem through the hot water collection tank and the circulation pump for the production of pure water. Through the above method, not only the cooling energy consumption of the PCW cooling tower fan is reduced, but also a stable heat source can be provided to heat up the raw water input to the water production subsystem, thereby ensuring the efficiency of the water production subsystem in producing pure water.

[0089] In the above embodiments, the descriptions of the respective embodiments have their own emphases. For parts not detailed in a certain embodiment, reference may be made to the relevant descriptions of other embodiments. The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as falling within the scope described in this specification.

[0090] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A pure water production system, characterized in that, Comprising: A heat exchange device and a water production subsystem; the heat exchange device includes a first channel and a second channel; The first end of the first channel is connected to an external water supply port, and the second end of the first channel is connected to the water inlet of the water production subsystem; The first end of the second channel is connected to the heat source outlet of an external heat source supply device, and the second end of the second channel is connected to the heat source inlet of the heat source supply device; Wherein, the heat source flowing through the second channel is used to heat the water flowing through the first channel, and the water production subsystem produces pure water based on the inflowing water.

2. The system according to claim 1, characterized in that, The pure water production system further includes: a water storage device; The second end of the first channel is connected to the water inlet of the water storage device, the water outlet of the water storage device is connected to the water inlet of the water production subsystem, and the water inlet of the water storage device is arranged above the water outlet of the water storage device.

3. The system according to claim 2, wherein The pure water production system further includes a purification device; The purification device is arranged at the water inlet of the water storage device, and the purification device is used to purify the water quality of the water flowing into the water storage device.

4. The system according to claim 2, wherein The pure water production system further includes a circulation water pump; The first end of the circulation water pump is connected to the water outlet of the water storage device, and the second end of the circulation water pump is connected to the water inlet of the water production subsystem.

5. The system according to claim 4, wherein, The pure water production system further includes a pretreatment subsystem; the pretreatment subsystem includes a raw water tank, a raw water pump, and a filtering device; The water inlet of the raw water tank is connected to the second end of the circulation water pump, and the water outlet of the raw water tank is connected to the first end of the raw water pump; The second end of the raw water pump is connected to the first end of the filtering device, and the second end of the filtering device is connected to the water inlet of the water production subsystem.

6. The system according to claim 5, wherein The raw water tank includes a first water inlet and a second water inlet, a switch valve is further arranged at the second water inlet, and the raw water tank is further provided with a control device, a water level detection device, and / or a water temperature detection device; The first water inlet is connected to the second end of the circulation water pump, and the second water inlet is connected to the external water supply port; The control device is connected to the water level detection device and / or the water temperature detection device; The control device controls the switch valve to replenish water to the raw water tank based on the detection results of the water level detection device and / or the water temperature detection device.

7. The system according to claim 6, wherein The control device is integrated in the switch valve.

8. The system according to any one of claims 2-7, characterized in that, The first channel includes a first sub-channel and a second sub-channel; the first sub-channel is arranged above the second channel, and the second sub-channel is arranged below the second channel; A spray pump is arranged at the water outlet of the first sub-channel, and a water collecting tray is arranged at the water inlet of the second sub-channel; The water flowing through the first sub-channel is sprayed onto the second channel through the spray pump, falls into the water collecting tray, and flows into the water storage device through the water outlet of the second sub-channel.

9. The system according to any one of claims 2-7, characterized in that, There are multiple heat exchange devices; The second end of the first channel of each heat exchange device is connected to the water inlet of the water storage device.

10. The system according to any one of claims 1-7, characterized in that, The heat exchange device is a pump cooling water tower; The heat source produced by the heat source supply device is water.

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