Low-temperature-resistant ultrafiltration water purification device

Abstract

The invention relates to the technical field of water quality purification, and 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] The present application relates to the technical field of water purification, and in particular to a low-temperature resistant ultrafiltration water purification device. Background Art

[0002] Water purification equipment is a water production device composed of multiple filtering units. It quickly improves water quality by filtering. It is often used to produce drinking water in environments where drinking water is scarce. In some special scenarios, such as performing tasks, surviving in the wild, and disaster relief, a large amount of drinking water is required in a short period of time, and auxiliary functions such as heating, secondary disinfection, storage, and transportation may be required. In some cases, the entire set of equipment is even required to work normally in harsh environments such as extreme weather, severe shaking, and repeated impacts, which puts higher demands on the performance and durability of water purification equipment.

[0003] Among various water treatment equipment, the use of ultrafiltration membrane filtration is a more commonly used water purification solution. Ultrafiltration is a membrane separation technology that uses pressure difference as a driving force. It can intercept bacteria, viruses, colloids and other particles in water to make the water quality meet the requirements of drinking water. Current ultrafiltration water purification equipment, such as "an ultrafiltration water purification device" disclosed in Chinese patent documents, with a publication number of 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 tank is connected to a return water pipe and a downstream 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 the present invention can improve the water purification effect and reduce the frequency of ultrafiltration membrane replacement. At the same time, the ultraviolet disinfection lamp can be quickly disassembled and installed, which brings convenience to the operator.

[0004] The filtration of this scheme has gone through six filtration stages: ultrafiltration, adsorption, first reverse osmosis, disinfection, second reverse osmosis, and ultraviolet disinfection. The ultrafiltration part can be recycled to further improve the water quality. At the same time, a detachable ultraviolet disinfection unit is used for easy maintenance. However, once the number of filtration steps of the device increases, water pressure and water production efficiency will become a big problem. At the end of the filtration, it is easy for the water to not be able to pass through the reverse osmosis membrane due to insufficient water pressure. Although the device is equipped with multiple water valves, there is no pressure relief pipe. Once the pipeline pressure increases, it will cause danger to the device. The entire device is mostly exposed to the air. After stopping operation in cold weather, the inside of the device is prone to ice formation and other phenomena that damage the pipelines and equipment, which limits the use environment of the device. Summary of the invention

[0005] The present application overcomes the shortcomings of the prior art such as insufficient water pressure, lack of pressure relief pipes in the device, and pipelines that are not cold-resistant, and provides a pump-driven filtration solution that reduces the filtration steps. Pressure relief drainage pipelines are set at multiple points in the device, and an antifreeze glycerin box is set in the middle section of the device. The valve switch is used to perform pipeline antifreeze operations, thereby expanding the scope of application of the device to provide a low-temperature resistant ultrafiltration water purification device.

[0006] In order to solve the above problems, this application adopts the following technical solutions.

[0007] A low-temperature resistant ultrafiltration water purification device includes a water inlet, a water inlet pump, a primary filter, an ultrafiltration membrane assembly, an antifreeze glycerin box, an activated carbon filter, a water output outlet and a waste liquid discharge pipe; the water inlet is connected to the water inlet pump; the water inlet pump is connected to the primary filter; the primary filter is respectively connected to the antifreeze glycerin box and the activated carbon filter; the ultrafiltration membrane assembly is connected to the activated carbon filter; an ultraviolet sterilizer is arranged between the activated carbon filter and the water output outlet; the water inlet, the primary filter, the ultrafiltration membrane assembly, the antifreeze glycerin box, the activated carbon filter and the ultraviolet sterilizer are all connected to the waste liquid discharge pipe. The device cooperates with the water inlet pump to form a filtration step mainly based on ultrafiltration, ensuring sufficient pipeline pressure while ensuring the water purification effect; pressure relief pipelines connected to the waste liquid discharge pipe are arranged at each key node of the device to avoid the risk caused by excessive pressure; an antifreeze glycerin box is arranged in the middle section of the device, and the pipeline antifreeze operation can be performed in conjunction with the valve switch, which improves the cold resistance of the device and expands the scope of application.

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

[0009] Preferably, the primary filter comprises 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 assembly comprises one or more ultrafiltration membrane elements; the ultrafiltration membrane elements are provided with a water inlet, a produced water outlet and a concentrated water outlet; the number of ultrafiltration membrane elements is determined by the produced water volume and the water pressure.

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

[0012] Preferably, the activated carbon filter comprises one or more activated carbon filter elements; each of the activated carbon filter elements is of the same model; the same model ensures high substitutability of the membrane element and facilitates production and maintenance.

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

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

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

[0016] Preferably, the antifreeze glycerol box is filled with a mixed antifreeze liquid, which is a mixed solution of glycerol and sodium bisulfite aqueous solution; during the low-temperature storage of the equipment, the mixed antifreeze liquid of glycerol and sodium bisulfite is perfused between each device and pipeline for preservation, so that the extreme storage temperature of the equipment can reach -55°C to 70°C.

[0017] Therefore, the present application has the following beneficial effects: (1) In conjunction with the water inlet pump, a filtration step based on ultrafiltration is formed, which ensures sufficient pipeline pressure while ensuring the water purification effect. (2) Pressure relief pipelines connected to the waste liquid discharge pipe are set at each key node of the device to avoid the risk caused by excessive pressure. (3) An antifreeze glycerin box is set in the middle section of the device, and the pipeline antifreeze operation can be performed in conjunction with the valve switch, which improves the cold resistance of the device and expands the scope of application. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of a low-temperature resistant ultrafiltration water purification device in an embodiment of the present application.

[0019] In the figure: 1-water inlet, 2-water inlet pump, 3-primary filter, 4-ultrafiltration membrane assembly, 5-antifreeze glycerin box, 6-activated carbon filter, 7-ultraviolet sterilizer, 8-water outlet, 9-waste liquid discharge pipe. DETAILED DESCRIPTION

[0020] The implementation methods of the present application are further described below through specific examples.

[0021] like Figure 1As shown, the present application involves a low-temperature resistant ultrafiltration water purification device, comprising a water inlet 1, a water inlet pump 2, a primary filter 3, an ultrafiltration membrane assembly 4, an antifreeze glycerol box 5, an activated carbon filter 6, a produced water outlet 8 and a waste liquid discharge pipe 9; the water inlet 1 is connected to the water inlet pump 2; the water inlet pump 2 is connected to the primary filter 3; the primary filter 3 is respectively connected to the antifreeze glycerol box 5 and the activated carbon filter 6; 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 produced water outlet 8; the water inlet 1, the primary filter 3, the ultrafiltration membrane assembly 4, the antifreeze glycerol box 5, the activated carbon filter 6 and the ultraviolet sterilizer 7 are all connected to the waste liquid discharge pipe 9.

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

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

[0024] Preferably, the ultrafiltration membrane assembly 4 comprises one or more ultrafiltration membrane elements. In an embodiment, four ultrafiltration membrane elements are provided; the ultrafiltration membrane elements are provided with a water inlet, a produced water outlet and a concentrated water outlet.

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

[0026] Preferably, the activated carbon filter 6 comprises one or more activated carbon filter elements. In the embodiment, two activated carbon filter elements are provided; and the activated carbon filter elements are of the same model.

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

[0028] Preferably, a waste liquid discharge port is provided at the tail end of the waste liquid external discharge pipe 9; and a flow regulating main valve is provided at the waste liquid discharge port.

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

[0030] The application process is as follows.

[0031] like Figure 1As shown in the figure, after the raw water is pressurized by the water inlet pump, it enters the primary filter for treatment; the primary filter uses the filter to directly intercept impurities in the water, remove suspended matter and particulate matter in the water, and reduce turbidity at the same time; then the raw water enters the ultrafiltration step, and the bacteria, viruses, colloids, macromolecules and other particles in the water are intercepted and filtered and then sent to the ultraviolet sterilizer; through deep sterilization in the ultraviolet sterilizer, the production of some higher aquatic organisms, such as algae and red worms, can be controlled; the disinfected produced water is directly connected to the produced water outlet, and the water quality indicators of the treated produced water meet the requirements of GB5749-2006 "Sanitary Standards for Drinking Water".

[0032] The lowest storage temperature of all components in the equipment is below -50℃, and it has strong cold resistance. The lowest storage temperature of the antifreeze glycerin tank is close to -200℃. During the low-temperature storage of the equipment, a mixed antifreeze of glycerin and sodium bisulfite is perfused between each device and pipeline for preservation, so that the extreme storage temperature of the equipment can reach -55℃-70℃. When the storage temperature is lower than the freezing point of the mixed antifreeze, the valve is kept open to a certain degree to ensure that the mixed antifreeze has a certain fluidity. When it is restored to use under low temperature conditions, the mixed antifreeze is perfused and recovered from the antifreeze glycerin tank.

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

Claims

1. A low temperature resistant ultrafiltration water purification device, characterized in that: The invention comprises a water inlet (1), a water inlet pump (2), a primary filter (3), an ultrafiltration membrane assembly (4), an antifreeze glycerol tank (5), an activated carbon filter (6), a produced water outlet (8) and a waste liquid discharge pipe (9); the water inlet (1) is connected to the water inlet pump (2); the water inlet pump (2) is connected to the primary filter (3); the primary filter (3) is respectively connected to the antifreeze glycerol tank (5) and the activated carbon filter (6); 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 produced water outlet (8); the water inlet (1), the primary filter (3), the ultrafiltration membrane assembly (4), the antifreeze glycerol tank (5), the activated carbon filter (6) and the 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 inlet pump (2); and a check valve is provided at the outlet of the water inlet pump (2).

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

4. The low temperature resistant ultrafiltration water purification device according to claim 1, characterized in that: The ultrafiltration membrane assembly (4) comprises an ultrafiltration membrane element; the ultrafiltration membrane assembly is provided with a water inlet, a produced water outlet and a concentrated water outlet.

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

6. The low temperature resistant ultrafiltration water purification device according to claim 1, characterized in that: The activated carbon filter (6) comprises an activated carbon filter element.

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 produced water outlet (8), and the outlet of the ultraviolet sterilizer (7) is connected to the produced 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: A waste liquid discharge port is provided at the tail end of the waste liquid discharge pipe (9); and a flow regulating main valve is provided at the waste liquid discharge port.

9. The low temperature resistant ultrafiltration water purification device according to claim 8, characterized in that: Flow regulating valves are provided between the waste liquid discharge pipe (9) and the primary filter (3), the ultrafiltration membrane assembly (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 tank (5) is filled with a mixed antifreeze liquid, which is a mixed solution of glycerin and an aqueous sodium bisulfite solution.

Images