Portable emergency nanofiltration water purifier

Abstract

The utility model relates to the technical field of water treatment equipment, and discloses a portable emergency nanofiltration water purifier which comprises a handle, a piston assembly, a pressure regulating assembly, a nanofiltration membrane assembly, a pump body and a back pressure valve, the handle is connected with the piston assembly and the pressure adjusting assembly through pin shafts, and drives the piston rod to reciprocate when pressed; the pressure regulating assembly comprises a pressure regulating valve sleeve, a pressure regulating valve body, a pressure regulating valve element, a pressure regulating spring and a pressure regulating screw. The concentrated water discharge pressure p2 of the pressure regulating assembly can be set by regulating the pressure regulating screw, so that the concentrated water discharge pressure of the membrane assembly is controlled not to be lower than p2; the pump body is connected with the membrane component; the pump body is provided with a water inlet valve; the water inlet valve mainly comprises a spring and a water inlet valve core; the back pressure valve sets pressure p1 and is used for controlling the water inlet pressure of the membrane module not to be lower than p1; heavy metal and organic pollutants in raw water are efficiently removed by the nanofiltration water purifier, and meanwhile, mineral substances beneficial to a human body are partially reserved.

Description

Technical Field

[0001] This application relates to the field of water treatment equipment technology, specifically to a portable emergency nanofiltration water purifier. Background Technology

[0002] Water is the origin of life and one of the basic needs of human life and production. Humans require large quantities of safe drinking water for field training, combat, emergency rescue, and wilderness exploration. While the surrounding environment often has abundant water resources, they are not suitable for direct consumption. Due to the complex nature of water resources worldwide and the varying composition of water quality, simple water purification processes cannot meet the needs of all types of water sources. Drinking untreated natural water contains various complex substances and microorganisms, including organic pollutants, heavy metal contamination, viruses, and bacteria. Direct consumption can lead to a series of dangerous situations such as allergies, diarrhea, and poisoning, seriously endangering human health. Therefore, developing portable and efficient drinking water treatment devices is an important means of ensuring the safety of drinking water for personnel in emergency situations.

[0003] To meet the basic technical requirements of portable water purifiers—high efficiency, lightweight and labor-saving design, durability, and portability—membrane technology has become the mainstream. Representative water purification devices from both domestic and international sources are publicly available as follows:

[0004] A reverse osmosis water purification device, disclosed in Chinese patent literature (publication number CN 118324254A), includes a frame, a purified water shell fixedly connected to the frame, a first fixed frame fixedly connected inside the purified water shell, a reverse osmosis membrane fixedly connected between the first fixed frame and the purified water shell, a purified water pipe fixedly connected to the first fixed frame, the side of the reverse osmosis membrane away from the first fixed frame communicating with the purified water pipe, a concentrated water pipe fixedly connected to and communicating with the first fixed frame, a flow limiting frame fixedly connected inside the concentrated water pipe, a flow limiting plate rotatably connected to the flow limiting frame, a monitoring mechanism for detecting the purified water flow rate on the purified water pipe, and a regulating mechanism for regulating the pressure inside the purified water shell on the concentrated water pipe. The pressure inside the purified water shell is regulated by changing the flow area of ​​the concentrated water pipe through the cooperation of the flow limiting plate and the flow limiting frame.

[0005] Chinese utility model patent "An Outdoor Emergency Water Purification Device", publication number CN 214167562 U, discloses a pull-out reverse osmosis water purification device. This device can effectively remove harmful substances from water. However, the pull-out plunger design for pressurizing the device is relatively laborious to operate. Furthermore, due to the limitations of the reverse osmosis water treatment process in terms of recovery rate, the device cannot adjust the pressure, resulting in uncontrollable water production and a low output.

[0006] In summary, portable water purifiers currently typically use reverse osmosis membranes. Reverse osmosis membranes can remove almost all contaminants, including organic matter, bacteria, and suspended solids. However, they also remove essential minerals and trace elements. Furthermore, reverse osmosis membranes are more expensive and more susceptible to fouling. They also require high driving force and have low water production efficiency. Utility Model Content

[0007] To address the above technical issues, this application proposes a portable emergency nanofiltration water purifier. By adjusting the back pressure valve and pressure regulating component, the nanofiltration water purifier can efficiently remove heavy metals and organic pollutants from the raw water, while partially retaining minerals beneficial to the human body, thereby increasing water production efficiency.

[0008] The technical solution adopted by this application to achieve its purpose is as follows.

[0009] A portable emergency nanofiltration water purifier includes a handle, a piston assembly, a membrane assembly, a pressure regulating assembly, a pump body, and a back pressure valve. The handle is connected to the piston assembly and the pressure regulating assembly via a pin, and pressing it drives the piston rod to reciprocate. The piston assembly and the pressure regulating assembly are installed in the pump body. The handle, piston assembly, pressure regulating assembly, and pump body together form a push-button high-pressure pump. The pump body is connected to the membrane assembly. The pressure regulating assembly includes a pressure regulating valve sleeve, a pressure regulating valve body, a pressure regulating valve core, a pressure regulating spring, and a pressure regulating screw. The pump body is equipped with an inlet valve, which mainly includes a spring, an inlet valve core, and a check valve. By adjusting the pressure regulating screw, the concentrate discharge pressure p2 of the pressure regulating assembly can be set to control the concentrate discharge pressure of the membrane assembly to be no lower than p2. The pump body is connected to the membrane assembly. The pump body is equipped with an inlet valve, which mainly includes a spring and an inlet valve core. The back pressure valve can be set to a pressure p1 to control the inlet pressure of the membrane assembly to be no lower than p1.

[0010] Preferably, the piston assembly and pressure regulating assembly are installed in the pump body and fastened by end threads. The push-button handle is supported by the pin at the pressure regulating assembly. When the handle is pulled upward, the piston moves to the left, the inlet check valve core in the pump body opens, and raw water enters the piston chamber. When the handle is pressed downward, the water in the piston chamber is forced into the membrane assembly.

[0011] Preferably, the pump body outlet channel is connected to the membrane module inlet channel, the membrane module concentrate channel is connected to the annular inlet channel of the pressure regulating component, the annular inlet channel is connected to the orifice channel, and is connected to the pressure regulating valve core. Ultimately, water in the membrane module can be introduced into the pressure regulating valve core in the pressure regulating component. The pressure regulating valve core is subject to the elastic force of the spring, and the pressure limit when the valve is opened is equal to the magnitude of the elastic force.

[0012] Preferably, the adjusting screw in the pressure regulating assembly is threadedly connected to the pressure regulating valve body. Tightening the adjusting screw to adjust its depth can change the compression of the spring, i.e., the elastic force, thereby adjusting the valve pressure limit.

[0013] Preferably, when the water pressure inside the membrane module is greater than the pressure limit p2 set by the pressure regulating component, the pressure regulating valve core is opened by the water pressure, and the concentrate inside the membrane module is finally discharged from the concentrate discharge channel of the pump body through the gap opened by the pressure regulating valve core.

[0014] Preferably, since the press-type high-pressure pump can significantly reduce the driving force of operation, the recovery rate of the water treatment process can be improved and the water production efficiency can be increased by adjusting the pressure through the pressure regulating component with only a small increase in driving force.

[0015] Preferably, p1 is not higher than p2, so that the pressure in the membrane module (4) is maintained higher than p1, thereby achieving efficient removal of heavy metals and organic pollutants.

[0016] Preferably, p1 is 0.3 MPa and p2 is 0.3~0.5 MPa.

[0017] The working process of the portable emergency nanofiltration water purifier described in this application includes a water intake process and a pressurized water purification process.

[0018] Water intake process: The handle is supported by the pin at the pressure regulating component. When the handle is pulled upward, the piston moves to the left, the water inlet valve of the pump body opens, and the raw water enters the piston chamber.

[0019] Pressurized water purification process: When the handle is pressed down, the piston moves to the right, pressurizing the raw water through the plunger. When the raw water pressure is higher than the back pressure valve pressure p1, it enters the nanofiltration membrane module for membrane filtration. The filtered concentrate reaches the pressure regulating valve pressure p2 and is discharged through the pressure regulating valve.

[0020] The above-mentioned (at least one) technical solution adopted in this application can achieve the following beneficial effects:

[0021] (1) A portable water purifier using nanofiltration membrane as membrane module is used to achieve efficient removal of inorganic non-metallic substances, heavy metals and organic matter by nanofiltration membrane, while partially retaining minerals that are beneficial to the human body;

[0022] (2) The back pressure valve and the pressure regulating valve work together to regulate the pressure inside the membrane module during the membrane treatment process. It is suitable for treating drinking water sources with a variety of pollutants, including heavy metals such as hexavalent chromium, lead ions, and cadmium ions, as well as organic pollutants such as chloroform, hexachlorocyclohexane, and DDT. Attached Figure Description

[0023] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0024] Figure 1 This is an explosion diagram of the portable emergency nanofiltration water purifier according to an embodiment of this application;

[0025] Figure 2 This is a cross-sectional schematic diagram of a portable emergency nanofiltration water purifier according to an embodiment of this application;

[0026] Figure 3 This is a schematic diagram of the water absorption process of the portable emergency nanofiltration water purifier according to an embodiment of this application;

[0027] Figure 4 This is a schematic diagram of the pressurization process of the portable emergency nanofiltration water purifier according to an embodiment of this application;

[0028] Figure 5 This is a line graph showing the change in membrane flux of the nanofiltration membrane in an embodiment of this application as a function of pressure.

[0029] Figure 6 This is a line graph showing the hexavalent chromium removal rate of the nanofiltration membrane in an embodiment of this application as a function of pressure.

[0030] Figure 7 This is a line graph showing the lead ion removal rate of the nanofiltration membrane in an embodiment of this application as a function of pressure.

[0031] Figure 8 This is a line graph showing the cadmium ion removal rate of the nanofiltration membrane in an embodiment of this application as a function of pressure.

[0032] Figure 9 This is a line graph showing the trichloromethane removal rate of the nanofiltration membrane in an embodiment of this application as a function of pressure.

[0033] Figure 10 This is a line graph showing the HCH removal rate of the nanofiltration membrane in this application as a function of pressure.

[0034] Figure 11 This is a line graph showing the DDT removal rate of the nanofiltration membrane in this application as a function of pressure.

[0035] In the diagram: 1. Handle, 2. Piston assembly, 2-1. Piston rod, 2-2. Piston cap, 2-3. Piston end cap, 2-4. Piston, 2-5. Graphite ring, 2-6. Sealing ring, 2-7. Piston sleeve, 3. Pressure regulating assembly, 3-1. Pressure regulating valve sleeve, 3-2. Pressure regulating valve body, 3-3. Pressure regulating valve core, 3-4. Pressure regulating spring, 3-5. Pressure regulating screw, 4. Membrane assembly, 5. Pump body, 5-1. Spring, 5-2. Inlet valve core, 5-3. Outlet flow channel, 6. Back pressure valve. Detailed Implementation

[0036] The present invention will be further described below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present invention.

[0037] The technical concept of this application is to design a portable emergency nanofiltration water purifier that can regulate the filtration pressure of the membrane module. Raw water is drawn into the chamber by a piston and then pressurized by a plunger. When the raw water pressure is higher than the back pressure valve pressure, it enters the membrane module for membrane filtration. The filtered concentrate is discharged from the pump body through the pressure regulating valve after reaching the pressure regulating valve pressure.

[0038] like Figure 1 and 2 As shown, this embodiment proposes a portable emergency nanofiltration water purifier, including a handle 1, a piston assembly 2, a pressure regulating assembly 3, a membrane assembly 4, a pump body 5, and a back pressure valve 6. The handle 1 is connected to the piston assembly 2 and the pressure regulating assembly 3 via a pin, and pressing it drives the piston rod 2-1 to reciprocate. The piston assembly 2 and the pressure regulating assembly 3 are installed inside the pump body 5. The handle 1, piston assembly 2, pressure regulating assembly 3, and pump body 5 together form a press-type high-pressure pump. The pump body 5 is connected to the membrane assembly 4. The pressure regulating assembly 3 includes a pressure regulating valve sleeve 3-1, a pressure regulating valve body 3-2, a pressure regulating valve core 3-3, a pressure regulating spring 3-4, and a pressure regulating screw 3-5. The pump body 5 is equipped with... The inlet valve mainly includes a spring 5-1, an inlet valve core 5-2, and a one-way valve 5-3. The concentrated water discharge pressure p2 of the pressure regulating component 3 can be set by adjusting the pressure regulating screw 3-5 to control the concentrated water discharge pressure of the membrane module 4 to be no lower than p2. The pump body 5 is connected to the membrane module 4. The pump body 5 is equipped with an inlet valve, which mainly includes a spring 5-1 and an inlet valve core 5-2. The back pressure valve 6 can be set to a pressure p1 to control the inlet water pressure of the membrane module 4 to be no lower than p1.

[0039] Specifically, the piston assembly 2 and the pressure regulating assembly 3 are installed inside the pump body 5 and are fastened by end threads, such as... Figure 3 As shown, the push-button handle 1 is supported by the pin at the pressure regulating component 3. When the handle 1 is pulled upward, the piston moves to the left, the water inlet valve core 5-2 in the pump body 5 opens, and raw water enters the piston chamber; as Figure 4As shown, when the handle is pressed down, the piston moves to the right and the water in the piston chamber is forced into the membrane assembly (4). The concentrated water discharged from the membrane treatment is finally discharged from the pump body 5 through the pressure regulating assembly 3.

[0040] Specifically, the outlet channel of the pump body 5 is connected to the inlet channel of the membrane module 4, the concentrate channel of the membrane module is connected to the annular inlet channel of the pressure regulating component, the annular inlet channel is connected to the orifice channel, and is connected to the pressure regulating valve core 3-3. Ultimately, the water in the membrane module 4 can be introduced into the pressure regulating valve core 3-3 in the pressure regulating component 3. The pressure regulating valve core 3-3 is subjected to the elastic force of the spring 3-4, and the pressure limit when the pressure regulating valve core 3-3 is opened is equal to the magnitude of the elastic force.

[0041] Specifically, the adjusting screw 3-5 in the pressure regulating component 3 is threadedly connected to the pressure regulating component 3. Tightening the adjusting screw 3-5 to adjust its depth can change the compression amount, i.e. the elastic force, of the spring 3-4, thereby adjusting the valve pressure limit.

[0042] Specifically, when the water pressure inside the membrane module 4 is greater than the pressure limit set by the pressure regulating component 3, the pressure regulating valve core 3-3 is opened by the water pressure, and the concentrated water inside the membrane module 4 is finally discharged from the concentrated water discharge channel of the pump body 5 through the gap opened by the pressure regulating valve core 3-3.

[0043] Furthermore, p1 is not higher than p2, so that the pressure in the membrane module (4) is maintained higher than p1, thereby achieving efficient removal of heavy metals and organic pollutants.

[0044] Furthermore, p1 is 0.3 MPa, and p2 is 0.3~0.5 MPa.

[0045] In some embodiments, such as Figure 3 and Figure 4 The working process of the portable emergency nanofiltration water purifier is provided, including the water intake process and the pressurized water purification process.

[0046] like Figure 3 As shown, the handle 1 is supported by the pin at the pressure regulating component 3. When the handle 1 is pulled upward, the piston moves to the left, the water inlet valve core 5-2 of the pump body 5 opens, and the raw water enters the piston chamber.

[0047] like Figure 4 As shown, when the handle is pressed down, the piston moves to the right, pressurizing the raw water through the plunger. When the raw water pressure is higher than the back pressure valve pressure p1, it enters the nanofiltration membrane module 4 for membrane filtration. The filtered concentrate reaches the pressure regulating valve pressure p2 and is then discharged through the pressure regulating valve.

[0048] like Figures 5 to 11As shown in the figure, the line graphs of membrane flux change, heavy metal removal rate, and organic pollutant removal rate of the three nanofiltration membranes NF1, NF2, and NF3 as a function of pressure in this embodiment show that the performance of nanofiltration membranes generally improves with increasing operating pressure. Within the pressure range of 0.3–0.5 MPa, the nanofiltration membranes exhibit good performance in terms of permeate water, heavy metal removal, and organic matter removal.

[0049] With an operating pressure of 0.5 MPa, the optimal nanofiltration membrane NF3 achieves removal rates of 64%–79% for inorganic non-metallic substances, 57%–91% for heavy metals, and 62%–85% for organic matter within 1.7 times the national standard. NF1, operating at 0.5 MPa, can retain 60–66% of total hardness, calcium ions, and magnesium ions, with concentrations of various indicators in the effluent lower than the standard limits.

[0050] In summary, the technical solution of this application can achieve the following beneficial effects: a portable water purifier using nanofiltration membrane as the membrane module can achieve efficient removal of inorganic non-metallic substances, heavy metals and organic matter by nanofiltration membrane, while partially retaining minerals beneficial to the human body; the back pressure valve and pressure regulating valve work together to regulate the pressure inside the membrane module during the membrane treatment process, which is suitable for the treatment of drinking water sources with various pollutants, including heavy metals such as hexavalent chromium, lead ions, and cadmium ions, and organic pollutants such as chloroform, hexachlorocyclohexane, and DDT.

[0051] The above embodiments are only used to further illustrate that this application is a portable emergency nanofiltration water purifier, but this utility model is not limited to the embodiments. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of this utility model shall fall within the protection scope of this utility model.

Claims

1. A portable emergency nanofiltration water purifier, characterized in that, It includes a handle (1), a piston assembly (2), a pressure regulating assembly (3), a diaphragm assembly (4), a pump body (5), and a back pressure valve (6). The handle (1) is connected to the piston assembly (2) and the pressure regulating assembly (3) by a pin, and when pressed, it drives the piston rod (2-1) to reciprocate. The pressure regulating assembly (3) includes a pressure regulating valve sleeve (3-1), a pressure regulating valve body (3-2), a pressure regulating valve core (3-3), a pressure regulating spring (3-4), and a pressure regulating screw (3-5). The concentrated water discharge pressure p2 of the pressure regulating assembly (3) can be set by adjusting the pressure regulating screw (3-5) to control the concentrated water discharge pressure of the membrane assembly (4) to be not lower than p2. The pump body (5) is connected to the membrane module (4); the pump body (5) is provided with an inlet valve, which mainly includes a spring (5-1) and an inlet valve core (5-2). The back pressure valve (6) is set to pressure p1 to control the inlet water pressure of the membrane module (4) to be no lower than p1.

2. The portable emergency nanofiltration water purifier according to claim 1, characterized in that, The pressure regulating component (3) is provided with a concentrate inlet channel and a concentrate outlet channel. The pressure regulating valve core (3-3) and the pressure regulating spring (3-4) are located in the outlet channel. The pressure regulating screw (3-5) presses the pressure regulating valve core (3-3) and the pressure regulating spring (3-4) into the outlet channel.

3. The portable emergency nanofiltration water purifier according to claim 1, characterized in that, The pressure regulating screw (3-5) in the pressure regulating assembly (3) is threadedly engaged with the pressure regulating valve body (3-2), and the pressure regulating valve core (3-3) and the pressure regulating spring (3-4) are installed inside the pressure regulating valve body (3-2). The compression of the pressure regulating spring (3-4) is changed by turning the pressure regulating screw (3-5).

4. The portable emergency nanofiltration water purifier according to claim 1, characterized in that, The membrane module (4) may be fitted with a nanofiltration membrane, which may be a ceramic nanofiltration membrane or a polymer nanofiltration membrane.

5. The portable emergency nanofiltration water purifier according to claim 1, characterized in that, The pressure p1 is not higher than p2, so that the pressure in the membrane module (4) is maintained higher than p1, thereby achieving efficient removal of heavy metals and organic pollutants.

6. The portable emergency nanofiltration water purifier according to claim 5, characterized in that, p1 is 0.3 MPa, and p2 is 0.3~0.5 MPa.

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