Low-temperature-resistant ultrafiltration water purification device

Abstract

The utility model discloses a low-temperature-resistant ultrafiltration water purification device which comprises a water inlet, a water inlet pump, a primary filter, an ultrafiltration membrane assembly, an anti-freezing glycerol tank, an activated carbon filter, a produced water outlet and a waste liquid discharge pipe, the water inlet is connected with a water inlet pump; the water inlet pump is connected with the primary filter; the primary filter is respectively connected with the anti-freezing glycerol tank and the active carbon filter; the ultrafiltration membrane assembly is connected with the active carbon filter; an ultraviolet sterilizer is arranged between the activated carbon filter and the produced water outlet; the water inlet, the primary filter, the ultrafiltration membrane assembly, the anti-freezing glycerol tank, the activated carbon filter and the ultraviolet sterilizer are all connected with a waste liquid discharge pipe. Enough pipeline pressure is ensured while the water purification effect is ensured; each key node of the device is provided with a pressure relief pipeline connected with a waste liquid discharge pipe, so that the risk caused by excessive pressure is avoided; and the anti-freezing glycerol tank is arranged and is matched with a valve switch to perform pipeline anti-freezing operation, so that the cold resistance of the device is improved.

Description

Technical Field

[0001] This application relates to the field of water purification, and in particular to a low-temperature resistant ultrafiltration water purification device. Background Technology

[0002] A water purification system is a water production device composed of multiple filtration units. It rapidly improves water quality through filtration and is often used to produce drinking water in environments where drinking water is scarce. In special scenarios, such as missions, wilderness survival, and disaster relief, large quantities of drinking water need to be used in a short period, and auxiliary functions such as heating, secondary disinfection, storage, and transportation may be required. In some cases, the entire system needs to operate normally under harsh environments such as extreme weather, violent shaking, and repeated impacts, which places higher demands on the performance and durability of water purification equipment.

[0003] Among various water treatment devices, ultrafiltration membrane filtration is a commonly used water purification solution. Ultrafiltration is a membrane separation technology driven by pressure difference, which can trap bacteria, viruses, colloids, and other particles in water, making the water quality meet drinking water requirements. Current ultrafiltration water purification equipment, such as "An Ultrafiltration Water Purification Device" disclosed in Chinese patent literature (publication number CN112573735A), includes an ultrafiltration unit, an adsorption unit, a membrane filtration unit, and a disinfection unit. The ultrafiltration unit includes multiple ultrafiltration tanks; the ultrafiltration tanks are connected to a return water pipe and a forward water pipe; the membrane filtration unit includes a first reverse osmosis unit and a second reverse osmosis unit; the disinfection unit includes a disinfection tank and an ultraviolet lamp disinfection unit. The water purification device in this utility model can improve the water purification effect, reduce the frequency of ultrafiltration membrane replacement, and the ultraviolet disinfection lamp can be quickly disassembled and installed, bringing convenience to operators.

[0004] The filtration system employs six stages: ultrafiltration, adsorption, first reverse osmosis, disinfection, second reverse osmosis, and ultraviolet disinfection. The ultrafiltration section is recirculated, further improving water quality, and the removable ultraviolet disinfection unit facilitates maintenance. However, the increased number of filtration stages leads to significant issues with water pressure and production efficiency. Insufficient water pressure at the end of the filtration process can prevent the reverse osmosis membrane from passing through. While the system has multiple valves, it lacks a pressure relief system, posing a safety hazard if the pipeline pressure rises. Furthermore, the system is largely exposed to air, making it susceptible to icing and damage to pipelines and equipment in cold weather after shutdown, thus limiting its operational environment. Utility Model Content

[0005] This application overcomes the shortcomings of existing technologies, such as insufficient water pressure, lack of pressure relief pipes, and poor cold resistance of pipelines. It provides a pump-driven filtration scheme that reduces filtration steps, sets pressure relief and drainage pipes at multiple points in the device, and installs an antifreeze glycerin tank in the middle section of the device. With the help of valve switches, the pipeline is protected against freezing, thus expanding the applicability of the device. This is a low-temperature resistant ultrafiltration water purification device.

[0006] To address the aforementioned problems, this application adopts the following technical solution.

[0007] A low-temperature resistant ultrafiltration water purification device includes an inlet, an inlet pump, a pre-filter, an ultrafiltration membrane module, an antifreeze glycerin tank, an activated carbon filter, a product water outlet, and a waste liquid discharge pipe. The inlet is connected to the inlet pump; the inlet pump is connected to the pre-filter; the pre-filter is connected to both the antifreeze glycerin tank and the activated carbon filter; the ultrafiltration membrane module is connected to the activated carbon filter; an ultraviolet sterilizer is installed between the activated carbon filter and the product water outlet; the inlet, pre-filter, ultrafiltration membrane module, antifreeze glycerin tank, activated carbon filter, and ultraviolet sterilizer are all connected to the waste liquid discharge pipe. The device, in conjunction with the inlet pump, forms a filtration process primarily based on ultrafiltration, ensuring sufficient pipeline pressure while maintaining effective water purification. Pressure relief pipelines connected to the waste liquid discharge pipe are installed at each key node of the device to avoid risks caused by excessive pressure. An antifreeze glycerin tank is located in the middle section of the device, which, with the help of valves, allows for pipeline antifreeze operation, enhancing the device's cold resistance and expanding its applicability.

[0008] Preferably, a three-way valve is provided between the water inlet and the water pump; a check valve is provided at the outlet of the water pump; the check valve prevents liquid backflow and ensures pipeline pressure.

[0009] Preferably, the pre-filter includes a filter element, a filter body, and a sealing ring; the filter element adopts a woven filter mesh structure; the woven filter mesh can intercept large particles, protect the subsequent ultrafiltration membrane from damage, and is easy to replace.

[0010] Preferably, the ultrafiltration membrane module includes one or more ultrafiltration membrane elements; the ultrafiltration membrane element is provided with an inlet, a product water outlet and a concentrate outlet; the number of ultrafiltration membrane elements is determined by the product water volume and water pressure.

[0011] Preferably, the inlet and outlet of the ultrafiltration membrane element are connected to the waste liquid discharge pipe respectively; the outlet of the concentrated water is equipped with an automatic air vent valve; the automatic air vent valve can reduce the damage caused by gas impacting the pipeline.

[0012] Preferably, the activated carbon filter comprises one or more activated carbon filter elements; all activated carbon filter elements are of the same model; the same model ensures high substitutability of the membrane elements, facilitating production and maintenance.

[0013] Preferably, a three-way valve is provided between the ultraviolet sterilizer and the water outlet, and the outlet of the ultraviolet sterilizer is connected to the water outlet and the waste liquid discharge pipe respectively.

[0014] Preferably, the waste liquid discharge pipe is provided with a waste liquid discharge port at its tail end; the waste liquid discharge port is provided with a flow regulating valve; the flow regulating valve serves as a safety valve to prevent liquid from being discharged arbitrarily.

[0015] Preferably, a flow regulating valve is provided between the primary filter, the ultrafiltration membrane module, the antifreeze glycerin tank, the activated carbon filter and the waste liquid discharge pipe; the flow regulating valve can adjust the opening degree according to different functions, and improve the automation level of the device in conjunction with the control equipment.

[0016] Preferably, the antifreeze glycerin tank contains a mixed antifreeze solution, which is a mixture of glycerin and sodium bisulfite aqueous solution. During the low-temperature storage of the equipment, the mixed antifreeze solution of glycerin and sodium bisulfite is injected into the middle of each device and pipeline for preservation, so that the extreme storage temperature of the equipment can reach -55°C to 70°C.

[0017] Therefore, this application has the following beneficial effects: (1) It forms a filtration process mainly based on ultrafiltration in conjunction with the water inlet pump, ensuring sufficient pipeline pressure while guaranteeing the water purification effect. (2) Pressure relief pipelines connected to the waste liquid discharge pipe are set at each key node of the device, avoiding the risk caused by excessive pressure. (3) An antifreeze glycerin tank is set in the middle section of the device, which can be used in conjunction with valve switching to perform pipeline antifreeze operation, improving the cold resistance of the device and expanding its applicable scope. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the low-temperature resistant ultrafiltration water purification device in the embodiments of this application.

[0019] In the diagram: 1-Inlet, 2-Inlet pump, 3-Primary filter, 4-Ultrafiltration membrane module, 5-Antifreeze glycerin tank, 6-Activated carbon filter, 7-Ultraviolet sterilizer, 8-Product water outlet, 9-Waste liquid discharge pipe. Detailed Implementation

[0020] The implementation methods of this application will be further described below through specific embodiments.

[0021] like Figure 1As shown, this application relates to a low-temperature resistant ultrafiltration water purification device, comprising an inlet 1, an inlet pump 2, a primary filter 3, an ultrafiltration membrane module 4, an antifreeze glycerin tank 5, an activated carbon filter 6, a product water outlet 8, and a waste liquid discharge pipe 9; the inlet 1 is connected to the inlet pump 2; the inlet pump 2 is connected to the primary filter 3; the primary filter 3 is connected to both the antifreeze glycerin tank 5 and the activated carbon filter 6; the ultrafiltration membrane module 4 is connected to the activated carbon filter 6; an ultraviolet sterilizer 7 is provided between the activated carbon filter 6 and the product water outlet 8; the inlet 1, the primary filter 3, the ultrafiltration membrane module 4, the antifreeze glycerin tank 5, the activated carbon filter 6, and the ultraviolet sterilizer 7 are all connected to the waste liquid discharge pipe 9.

[0022] Specifically, a three-way valve is provided between the water inlet 1 and the water pump 2; a check valve is provided at the outlet of the water pump 2.

[0023] Specifically, the primary filter 3 includes a filter element, a filter body, and a sealing ring; the filter element adopts a woven filter mesh structure.

[0024] Specifically, the ultrafiltration membrane assembly 4 includes one or more ultrafiltration membrane elements. In this embodiment, four ultrafiltration membrane elements are provided. The ultrafiltration membrane element is provided with an inlet, a product water outlet, and a concentrate outlet.

[0025] Specifically, the inlet and outlet of the ultrafiltration membrane element are connected to the waste liquid discharge pipe 9, respectively; the outlet of the concentrated water is equipped with an automatic air vent valve.

[0026] Specifically, the activated carbon filter 6 includes one or more activated carbon filter elements. In this embodiment, two activated carbon filter elements are provided; all activated carbon filter elements are of the same type.

[0027] Specifically, a three-way valve is provided between the ultraviolet sterilizer 7 and the water outlet 8, and the outlet of the ultraviolet sterilizer 7 is connected to the water outlet 8 and the waste liquid discharge pipe 9 respectively.

[0028] Specifically, the tail end of the waste liquid discharge pipe 9 is provided with a waste liquid discharge port; the waste liquid discharge port is provided with a flow regulating valve.

[0029] Specifically, a flow regulating valve is provided between the primary filter 3, the ultrafiltration membrane module 4, the antifreeze glycerin tank 5, the activated carbon filter 6 and the waste liquid discharge pipe 9. In this embodiment, the flow regulating valve is a ball valve.

[0030] The application process is as follows.

[0031] like Figure 1As shown, after being pressurized by the inlet pump, the raw water enters the primary filter for treatment. The primary filter directly intercepts impurities in the water using a filter screen, removing suspended solids and particulate matter while reducing turbidity. The raw water then enters the ultrafiltration stage, where bacteria, viruses, colloids, macromolecules, and other particles are filtered out and sent to the ultraviolet sterilizer. The ultraviolet sterilizer deeply sterilizes the water, controlling the growth of some higher aquatic organisms, such as algae and red worms. The disinfected product water is directly discharged to the product water outlet, and the water quality indicators of the treated product water meet the requirements of GB5749-2006 "Standards for Drinking Water Quality".

[0032] All components in the equipment have a minimum storage temperature below -50℃, exhibiting strong cold resistance. The antifreeze glycerin tank has a minimum storage temperature approaching -200℃. During low-temperature storage, all devices and pipelines are filled with a mixed antifreeze solution of glycerin and sodium bisulfite for preservation, allowing the equipment to withstand extreme storage temperatures of -55℃ to 70℃. When the storage temperature falls below the freezing point of the mixed antifreeze solution, valves are kept slightly open to ensure the solution maintains a certain level of fluidity. When resuming use after low-temperature conditions, the mixed antifreeze solution is recovered by refilling the antifreeze glycerin tank.

[0033] The above embodiments are only used to further illustrate a low-temperature resistant ultrafiltration water purification device of this application, but this application is not limited to the embodiments. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of this application shall fall within the protection scope of the technical solution of this application.

Claims

1. A low-temperature resistant ultrafiltration water purification device, characterized in that: The system includes an inlet (1), an inlet pump (2), a primary filter (3), an ultrafiltration membrane assembly (4), an antifreeze glycerin tank (5), an activated carbon filter (6), a product water outlet (8), and a waste liquid discharge pipe (9). The inlet (1) is connected to the inlet pump (2). The inlet pump (2) is connected to the primary filter (3). The primary filter (3) is connected to the antifreeze glycerin tank (5) and the activated carbon filter (6) respectively. The ultrafiltration membrane assembly (4) is connected to the activated carbon filter (6). An ultraviolet sterilizer (7) is provided between the activated carbon filter (6) and the product water outlet (8). The inlet (1), primary filter (3), ultrafiltration membrane assembly (4), antifreeze glycerin tank (5), activated carbon filter (6), and ultraviolet sterilizer (7) are all connected to the waste liquid discharge pipe (9).

2. The low-temperature resistant ultrafiltration water purification device according to claim 1, characterized in that: A three-way valve is provided between the water inlet (1) and the water pump (2); a check valve is provided at the outlet of the water pump (2).

3. The low-temperature resistant ultrafiltration water purification device according to claim 1, characterized in that: The primary filter (3) includes a filter element, a filter body and a sealing ring; the filter element adopts a woven filter structure.

4. The low-temperature resistant ultrafiltration water purification device according to claim 1, characterized in that: The ultrafiltration membrane module (4) includes one or more ultrafiltration membrane elements; the ultrafiltration membrane elements are provided with an inlet, a product water outlet and a concentrate outlet.

5. The low-temperature resistant ultrafiltration water purification device according to claim 4, characterized in that: The inlet and outlet of the ultrafiltration membrane element are connected to the waste liquid discharge pipe (9) respectively; the outlet of the concentrated water is equipped with an automatic air vent valve.

6. The low-temperature resistant ultrafiltration water purification device according to claim 1, characterized in that: The activated carbon filter (6) includes one or more activated carbon filter elements; all activated carbon filter elements are of the same type.

7. The low-temperature resistant ultrafiltration water purification device according to claim 1, characterized in that: A three-way valve is provided between the ultraviolet sterilizer (7) and the water outlet (8), and the outlet of the ultraviolet sterilizer (7) is connected to the water outlet (8) and the waste liquid discharge pipe (9) respectively.

8. The low-temperature resistant ultrafiltration water purification device according to claim 1, characterized in that: The tail end of the waste liquid discharge pipe (9) is provided with a waste liquid discharge port; the waste liquid discharge port is provided with a flow regulating valve.

9. The low-temperature resistant ultrafiltration water purification device according to claim 8, characterized in that: The waste liquid discharge pipe (9) is equipped with a flow regulating valve between itself and the primary filter (3), the ultrafiltration membrane module (4), the antifreeze glycerin tank (5), and the activated carbon filter (6).

10. The low-temperature resistant ultrafiltration water purification device according to claim 1, characterized in that: The antifreeze glycerin box (5) contains mixed antifreeze.

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