Portable emergency nanofiltration water purifier

Abstract

The invention 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] The present application relates to the technical field of water treatment equipment, and in particular to a portable emergency nanofiltration water purifier. Background Art

[0002] Humans need a lot of safe drinking water for field training, emergency rescue, and field exploration. The surrounding environment often has sufficient but unsuitable water resources for direct drinking. Due to the complex water resources in various parts of the world and the different water quality components, simple water purification processes cannot meet the needs of various water sources. Drinking untreated natural water sources contains various complex substances and microorganisms, including organic pollution, heavy metal pollution, viruses and bacteria. Direct drinking will cause allergies, diarrhea, poisoning and other dangerous situations, which seriously endanger human health. Therefore, the development of portable and efficient drinking water treatment equipment is an important means to ensure the safety of drinking water for personnel in emergency situations.

[0003] In order to meet the basic technical requirements of portable water purifiers, such as high efficiency, lightness, labor saving, durability, and portability, membrane technology has become the mainstream technology. The following representative water purification devices have been published at home and abroad:

[0004] (1) A "reverse osmosis water purification device" disclosed in a Chinese patent document, with a publication number of CN118324254A, comprises a frame, a water purification shell is fixedly connected to the frame, a first fixing frame is fixedly connected inside the water purification shell, a reverse osmosis membrane is fixedly connected between the first fixing frame and the water purification shell, a water purification pipe is fixedly connected to the first fixing frame, a side of the reverse osmosis membrane away from the first fixing frame is connected to the water purification pipe, a concentrated water pipe is fixedly connected to the first fixing frame and is connected to the concentrated water pipe, a flow limiting frame is fixed inside the concentrated water pipe, the flow limiting frame is rotatably connected to the flow limiting plate, a monitoring mechanism for detecting the flow of purified water is provided on the water purification pipe, and a regulating mechanism for regulating the pressure inside the water purification shell is provided on the concentrated water pipe. The flow area of ​​the concentrated water pipe is changed by the cooperation of the flow limiting plate and the flow limiting frame, thereby regulating the pressure inside the water purification shell.

[0005] (2) The Chinese utility model patent “An outdoor emergency water purification device”, publication number CN 214167562 U, discloses a pull-out reverse osmosis water purification device. The device can effectively remove harmful substances in water. It uses a pull-out plunger design to pressurize the device, which is laborious to operate. In addition, since the reverse osmosis water treatment process is limited by the recovery rate, the device cannot adjust the pressure and the water output cannot be controlled, resulting in a small water output.

[0006] In summary, currently portable water purifiers usually use reverse osmosis membranes, which can intercept almost all pollutants, including organic matter, bacteria and suspended matter, but at the same time will also intercept minerals and trace elements necessary for the human body; at the same time, reverse osmosis membranes are more expensive and more easily contaminated; they have high driving force requirements and low water production efficiency. Summary of the invention

[0007] In response to the above technical problems, the present application proposes a portable emergency nanofiltration water purifier, which realizes the efficient removal of heavy metals and organic pollutants in raw water by regulating the back pressure valve and the pressure regulating component, while partially retaining minerals beneficial to the human body and 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 comprises 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 through a pin shaft, and drives the piston rod to reciprocate when pressed; the piston assembly and the pressure regulating assembly are installed in the pump body; the handle, the piston assembly, the pressure regulating assembly and the pump body together constitute a push-type high-pressure pump; the pump body is connected to the membrane assembly; the pressure regulating assembly comprises 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 provided with an inlet valve, which mainly comprises a spring, an inlet valve core and a one-way valve; the concentrated water discharge pressure p2 of the pressure regulating assembly can be set by adjusting the pressure regulating screw, which is used to control the concentrated water discharge pressure of the membrane assembly to be not lower than p2; the pump body is connected to the membrane assembly; the pump body is provided with an inlet valve, which mainly comprises a spring and an inlet valve core; the back-pressure valve can set the pressure p1, which is used to control the water inlet pressure of the membrane assembly to be not lower than p1.

[0010] Preferably, the piston assembly and the pressure regulating assembly are installed in the pump body and fastened by end threads. The push-type handle uses the pin shaft at the pressure regulating assembly as a support point. When the handle is stretched upward, the piston moves to the left, the water inlet one-way valve core in the pump body opens, and the raw water enters the piston chamber; when the handle is pressed downward, the water in the piston chamber is pressed into the membrane assembly.

[0011] Preferably, the water outlet channel of the pump body is connected to the water inlet channel of the membrane assembly, the concentrated water channel of the membrane assembly is connected to the annular water inlet channel of the pressure regulating assembly, the annular water inlet channel is connected to the hole channel, and is connected to the pressure regulating valve core. Ultimately, the water in the membrane assembly can be introduced into the pressure regulating valve core in the pressure regulating assembly, and the pressure regulating valve core is acted upon by the elastic force of the spring, and the pressure limit when the valve is opened is equal to the size of the elastic force.

[0012] Preferably, the adjusting screw in the pressure regulating assembly is threadedly connected to the pressure regulating valve body, and the adjusting screw is turned to adjust its depth, which can change the compression amount of the spring, that is, the elastic force, and adjust the valve pressure limit.

[0013] Preferably, when the water pressure in the membrane assembly is greater than the pressure p2 limit set by the pressure regulating assembly, the pressure regulating valve core is pushed open by the water pressure, and the concentrated water in the membrane assembly is finally discharged from the concentrated water discharge channel of the pump body along the gap opened by the pressure regulating valve core.

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

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

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

[0017] The working process of the portable emergency nanofiltration water purifier of the present application includes a water absorption process and a pressurized water purification process.

[0018] Water absorption process: The handle uses the pin shaft at the pressure regulating assembly as a support point. When the handle is stretched upward, the piston moves to the left, the water inlet valve core of the pump body opens, and the raw water enters the piston chamber;

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

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

[0021] The portable water purifier uses nanofiltration membrane as the membrane component to achieve efficient removal of inorganic non-metallic substances, heavy metals and organic matter by the nanofiltration membrane, while partially retaining minerals that are beneficial to the human body;

[0022] The back pressure valve and the pressure regulating valve are coordinated to adjust the pressure inside the membrane assembly during the membrane treatment process. It is suitable for the treatment of drinking water with a variety of different pollutants, including heavy metals such as hexavalent chromium, lead ions, cadmium ions, and organic pollutants such as chloroform, benzene hexachloride, and DDT. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Also, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

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

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

[0028] Figure 5 A line graph showing changes in membrane flux of the nanofiltration membrane according to an embodiment of the present application as a function of pressure;

[0029] Figure 6 A line graph showing the variation of hexavalent chromium removal rate of the nanofiltration membrane according to the embodiment of the present application with pressure;

[0030] Figure 7 A line graph showing the change in lead ion removal rate of the nanofiltration membrane of the embodiment of the present application as a function of pressure;

[0031] Figure 8 A line graph showing the change in cadmium ion removal rate of the nanofiltration membrane of the embodiment of the present application as a function of pressure;

[0032] Fig. 9 A line graph showing the change in chloroform removal rate of the nanofiltration membrane of the embodiment of the present application as a function of pressure;

[0033] Fig.10 A line graph showing the variation of the removal rate of hexachlorobenzene with pressure of the nanofiltration membrane in the embodiment of the present application;

[0034] Fig.11 This is a line graph showing the variation of DDT removal rate of the nanofiltration membrane according to the embodiment of the present application with pressure.

[0035] In the figure: 1. handle, 2. piston assembly, 2-1. piston rod, 2-2. piston cover, 2-3. piston end cover, 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. water inlet valve core, 5-3. water outlet flow channel, 6 back pressure valve. DETAILED DESCRIPTION

[0036] The present invention is further described below in conjunction with the accompanying drawings and embodiments, but they are not intended to limit the present invention.

[0037] The technical concept of the present application is to design a portable emergency nanofiltration water purifier that can regulate the filtration pressure of the membrane assembly. Raw water is sucked into the chamber through the piston, and then pressurized by the plunger. After the raw water pressure is higher than the back pressure valve pressure, it enters the membrane assembly for membrane filtration. After the filtered concentrated water reaches the pressure of the pressure regulating valve, it is discharged from the pump body through the pressure regulating valve.

[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 through a pin shaft, and drives the piston rod 2-1 to reciprocate when pressed; the piston assembly 2 and the pressure regulating assembly 3 are installed in the pump body 5; the handle 1, the piston assembly 2, the pressure regulating assembly 3 and the pump body 5 together constitute a push-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 provided with The water inlet valve mainly includes a spring 5-1, a water inlet valve core 5-2, and a one-way valve 5-3; the concentrated water discharge pressure p2 of the pressure regulating assembly 3 can be set by adjusting the pressure regulating screw 3-5, which is used 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 assembly 4; the pump body 5 is provided with a water inlet valve, which mainly includes a spring 5-1 and a water inlet valve core 5-2; the back pressure valve 6 can set the pressure p1, which is used to control the water inlet pressure of the membrane assembly 4 to be not lower than p1.

[0039] Specifically, the piston assembly 2 and the pressure regulating assembly 3 are installed in the pump body 5 and are fastened and installed through end threads, such as Figure 3 As shown, the push-type handle 1 uses the pin shaft at the pressure regulating assembly 3 as a support point. When the handle 1 is stretched upward, the piston moves to the left, the water inlet valve core 5-2 in the pump body 5 opens, and the raw water enters the piston chamber; Figure 4As shown, when the handle is pressed downward, the piston moves to the right, and the water in the piston chamber is pressed 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 water outlet channel of the pump body 5 is connected with the water inlet channel of the membrane assembly 4, the concentrated water channel of the membrane assembly is connected with the annular water inlet channel of the pressure regulating assembly, the annular water inlet channel is connected with the hole channel, and is connected with the pressure regulating valve core 3-3, and finally the water in the membrane assembly 4 can be introduced into the pressure regulating valve core 3-3 in the pressure regulating assembly 3, and the pressure regulating valve core 3-3 is acted upon by the elastic force of the spring 3-4, and the pressure limit value when the pressure regulating valve core 3-3 is opened is equal to the elastic force;

[0041] Specifically, the adjusting screw 3-5 in the pressure regulating assembly 3 is threadedly connected to the pressure regulating assembly 3, and the adjusting screw 3-5 is turned to adjust its depth, which can change the compression amount of the spring 3-4, that is, the elastic force, and adjust the valve pressure limit;

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

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

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

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

[0046] like Figure 3 As shown, the handle 1 uses the pin shaft at the pressure regulating assembly 3 as a support point. When the handle 1 is stretched 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 downward, the piston moves to the right, and the raw water is pressurized through the plunger. After the raw water pressure is higher than the back pressure valve pressure p1, it enters the nanofiltration membrane assembly 4 for membrane filtration. The filtered concentrated water reaches the pressure regulating valve pressure p2 and is discharged through the pressure regulating valve.

[0048] like Figures 5 to 11As shown in the figure, the membrane flux change, heavy metal removal rate and organic pollutant removal rate of the three nanofiltration membranes NF1, NF2 and NF3 in this embodiment are plotted against pressure. It can be seen from the figure that the performance of the nanofiltration membrane usually improves with the increase of the operating pressure. When the pressure is in the range of 0.3~0.5MPa, the performance of the nanofiltration membrane in water production, heavy metal and organic matter removal is better.

[0049] The operating pressure is 0.5MPa, and the removal rates of the best nanofiltration membrane NF3 for inorganic non-metallic substances, heavy metals and organic matter within 1.7 times the national standard are 64%~79%, 57%~91% and 62%~85% respectively. NF1 can intercept 60~66% of the total hardness, calcium ions and magnesium ions under the operating pressure of 0.5MPa, and the concentrations of various indicators in the effluent water quality are lower than the standard limits.

[0050] In summary, the technical solution of the present application can achieve the following beneficial effects: a portable water purifier with a nanofiltration membrane as a membrane component is used to achieve efficient removal of inorganic non-metallic substances, heavy metals and organic matter by the nanofiltration membrane, while partially retaining minerals beneficial to the human body; the back pressure valve and the pressure regulating valve are coordinated to regulate the pressure inside the membrane component during the membrane treatment process, which is suitable for the treatment of drinking water from a variety of different pollutants, including heavy metals such as hexavalent chromium, lead ions, cadmium ions, and organic pollutants such as chloroform, benzene hexachloride, and DDT.

[0051] The above embodiments are only used to further illustrate that the present application is a portable emergency nanofiltration water purifier, but the present invention 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 invention shall fall within the protection scope of the technical solution of the present invention.

Claims

1. A portable emergency nanofiltration water purifier, characterized in that: It comprises 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 shaft, and when pressed, drives the piston rod (2-1) to perform reciprocating motion; The pressure regulating assembly (3) comprises 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), so as 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 assembly (4); the pump body (5) is provided with a water inlet valve, and the water inlet valve mainly comprises a spring (5-1) and a water inlet valve core (5-2); The back pressure valve (6) is set at a pressure p1, and is used to control the water inlet pressure of the membrane assembly (4) to be no less than p1.

2. The portable emergency nanofiltration water purifier according to claim 1, characterized in that: The pressure regulating assembly (3) is provided with a concentrated water inlet channel and a concentrated water outlet channel, the pressure regulating valve core (3-3) and the pressure regulating spring (3-4) are located in the outlet channel, and the pressure regulating screw (3-5) presses the pressure regulating valve core (3-3) and the pressure regulating spring (3-4) in 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 threadably matched with the pressure regulating valve body (3-2), the pressure regulating valve core (3-3) and the pressure regulating spring (3-4) are installed in the pressure regulating valve body (3-2), and the compression amount 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 assembly (4) may be installed with a nanofiltration membrane, and the nanofiltration membrane is a ceramic nanofiltration membrane or a polymer nanofiltration membrane.

5. The portable emergency nanofiltration water purifier according to claim 1, characterized in that: The p1 is not higher than p2, so that the pressure in the membrane assembly (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: The p1 is 0.3 MPa, and the p2 is 0.3~0.5 MPa.

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