Water flux testing device

Abstract

The utility model belongs to the technical field of water flux performance testing in membrane separation, and particularly relates to a water flux testing device which comprises a liquid storage bottle, the bottle bottom of the liquid storage bottle is open, an upper plug column is connected to a bottle opening of the liquid storage bottle, a coaxial limiting section with the outer diameter larger than that of the upper plug column is arranged at the bottom of the upper plug column, and a connecting cavity is formed in the limiting section; the device further comprises a collecting bottle, a lower plug column is arranged on a bottle opening of the collecting bottle, the top of the lower plug column is connected into the limiting section connecting cavity in a screwed mode, a layer of hydrophilic film is further arranged between the upper plug column and the lower plug column, liquid in the liquid storage bottle flows into the collecting bottle through the hydrophilic film, and the device has the advantages of being simple in structure and convenient to use.

Description

Technical Field

[0001] This utility model belongs to the technical field of water flux performance testing in membrane separation, and particularly relates to a water flux testing device. Background Technology

[0002] Membrane separation technology boasts advantages such as low energy consumption, simple process, high separation efficiency, and no environmental pollution, making it a crucial high-tech solution to contemporary energy, resource, and environmental challenges. Its applications have expanded to fields including chemical engineering, food processing, pharmaceuticals, biochemistry, and environmental protection. Water flux is a key technical indicator of hydrophilic membranes, providing guidance for determining and utilizing membrane separation performance. Existing water flux testing devices are complex in structure and inconvenient to operate. Therefore, the inventors have proposed a simple and convenient water flux testing device. Summary of the Invention

[0003] The purpose of this invention is to provide a water flux testing device that improves ease of operation through a simplified structure.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] A water flux testing device includes a storage bottle with an open bottom and an upper stopper connected to the bottle opening. The bottom of the upper stopper has a coaxial limiting section with an outer diameter larger than that of the upper stopper. A connecting cavity is provided within the limiting section. The limiting section creates an interference fit between the bottom of the upper stopper and the storage bottle, accommodating the top of the lower stopper and forming a sealed structure to prevent leakage of liquid from the bottle opening during subsequent measurements. The device also includes a collection bottle with a lower stopper at its opening. The top of the lower stopper is screwed into the connecting cavity of the limiting section. The top of the lower stopper extends outward to form a pressure plate with an upper portion larger than the lower portion, which is screwed into the connecting cavity. A hydrophilic membrane is also provided between the upper and lower stoppers, allowing liquid from the storage bottle to flow into the collection bottle through the hydrophilic membrane.

[0006] Furthermore, both the upper and lower plugs are provided with through holes at their centers, which are designed to allow liquid to seep through.

[0007] Furthermore, the outer diameter of the upper plug increases from top to bottom. This design is to prevent inaccurate test results caused by liquid seepage from the outer periphery of the upper plug.

[0008] Furthermore, the connecting cavity and the upper and lower through holes are connected and coaxially arranged through a hydrophilic membrane, and the upper vent hole and the lower vent hole have the same diameter, which provides a channel for liquid seepage.

[0009] Furthermore, the outer diameter of the lower plug decreases from top to bottom, which is also to prevent seepage around the lower plug.

[0010] Furthermore, the portion of the lower plug located within the connecting cavity is a pressure plate. The outer diameter of the pressure plate is larger than the outer diameter of the bottom portion of the lower plug. The pressure plate is located within the limiting section. This arrangement ensures both a sealing effect and a fixation effect for the hydrophilic membrane, resulting in a larger contact area.

[0011] Furthermore, the outer wall of the collection bottle is provided with an exhaust pipe, which is connected to a vacuum pump. The arrangement of the exhaust pipe and the vacuum pump facilitates the formation of a pressure difference on both sides of the hydrophilic membrane, accelerates the seepage, and improves experimental efficiency.

[0012] The advantages of this invention are: when using this device, the hydrophilic membrane for testing the water flux is placed between the limiting section and the pressure plate in advance. After it is fixed, the liquid is poured into the storage bottle, and the vacuum pump is started to perform the measurement. The whole device has a simple structure, is easy to operate, and has good practical effect. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model.

[0014] Figure 2 This is a schematic diagram of the upper and lower plugs in this utility model.

[0015] In the diagram: 10. Storage bottle; 11. Upper stopper; 12. Limiting section; 13. Connecting cavity; 20. Collection bottle; 21. Lower stopper; 22. Pressure plate; 23. Through hole; 24. Exhaust pipe; 30. Hydrophilic membrane. Detailed Implementation

[0016] like Figure 1-2As shown, a water flux testing device includes a storage bottle 10 with an open bottom for easy pouring during testing. An upper stopper 11 is connected to the bottle opening. The bottom of the upper stopper has a coaxial limiting section 12 with an outer diameter larger than the upper stopper's outer diameter. A connecting cavity 13 is provided within the limiting section. This limiting section creates an interference fit between the bottom of the upper stopper and the storage bottle, accommodating the top of the lower stopper and forming a sealed structure to prevent liquid from entering the storage bottle during subsequent measurements. The system also includes a collection bottle 20 to prevent liquid leakage from the bottle opening. The collection bottle opening has a lower stopper 21, the top of which is screwed into the limiting section connecting cavity. The top of the lower stopper extends outward to form a pressure plate 22, which is larger at the top than at the bottom. This design creates an interference fit that prevents liquid leakage and better secures the hydrophilic membrane. The pressure plate is screwed into the connecting cavity, and a hydrophilic membrane 30 is also provided between the upper and lower stoppers. Liquid in the storage bottle flows into the collection bottle through this hydrophilic membrane. Both the upper and lower stoppers have through holes 23 at their centers. Furthermore, the diameters of the upper and lower through holes are the same. The through holes are designed to allow liquid to seep through while ensuring that the areas on both sides of the hydrophilic membrane through which the liquid seeps are equal, thus not affecting the accuracy of the test results. As an optimization, the outer diameter of the upper plug increases from top to bottom. This design is to prevent inaccurate test results caused by liquid seepage from the outer periphery of the upper plug. To make the test results more accurate, the connecting cavity and the upper and lower through holes are connected by the hydrophilic membrane and are coaxially arranged. The upper vent and lower vent have the same diameter, which provides a channel for liquid seepage. The outer diameter of the lower plug decreases from top to bottom. This design is also to prevent seepage from the outer periphery of the lower plug. The part of the lower plug located in the connecting cavity is a pressure plate. The outer diameter of the pressure plate is larger than the outer diameter of the bottom part of the lower plug. The pressure plate is located within the limiting section. This design ensures both a sealing effect and a fixed effect on the hydrophilic membrane, resulting in a larger contact area. The outer wall of the collection bottle is equipped with an exhaust pipe 21, which is connected to a vacuum pump. The exhaust pipe and vacuum pump facilitate the formation of a pressure difference on both sides of the hydrophilic membrane, accelerating seepage and increasing experimental efficiency.

[0017] In practical use, the storage bottle 10 is arranged above the collection bottle 20, and the two are coaxially arranged. They are fixedly connected by the cooperation of the upper stopper 11 and the lower stopper 21. The hydrophilic membrane 30 is sandwiched between the mating surfaces of the upper stopper 11 and the lower stopper 21. The liquid inside the storage bottle 10 flows into the collection bottle 20 after passing through the hydrophilic membrane 30. Both the upper stopper 11 and the lower stopper 21 are provided with circular through holes 23 at their axes. The outer diameter of the upper stopper 11 increases from top to bottom, and a limiting section 12 with an increased outer diameter is provided at the lower end of the upper stopper 11. The limiting section 12 is coaxially arranged with the upper stopper 11. A connecting cavity 13 is provided at the axis of the limiting section 12, and the diameter of the connecting cavity 13 is larger than the diameter of the through hole 23. The connecting cavity 13 is coaxially arranged with the through hole 23. The outer diameter of the lower stopper 21 decreases from top to bottom. A pressure plate 22, which screws into the connecting cavity 13, is provided at the upper end of the lower stopper 21. The pressure plate 22 is coaxially arranged with the lower stopper 21, and its outer diameter is larger than the diameter of the through hole 23. The upper stopper 11 is inserted into the mouth of the storage bottle 10. The upper stopper 11 is coaxially arranged with the storage bottle 10, and its fit with the mouth of the storage bottle 10 is interference-fitted to form a sealed connection. The lower stopper 21 is inserted into the mouth of the collection bottle 20. The lower stopper 21 is coaxially arranged with the collection bottle 20, and its fit with the collection bottle 20 is interference-fitted to form a sealed connection. The pressure plate 22 is screwed into the connecting cavity 13, and the hydrophilic membrane 30 is pressed between the bottom of the connecting cavity 13 and the top surface of the pressure plate 22, thereby connecting and fixing the storage bottle 10 and the collection bottle 20, while also providing a concealed fixation for the hydrophilic membrane 30. An exhaust pipe 24 is provided on the outer wall of the collection bottle 20. The exhaust pipe 24 is connected to a vacuum pump, which is used to evacuate the collection bottle 20. The bottom of the storage bottle 10 is open. After evacuating the collection bottle 20, a pressure difference is formed between the upper and lower surfaces of the hydrophilic membrane 30. The hydrophilic membrane 30 itself has a hydrophilic effect. The time is t, and the volume of liquid collected in the collection bottle 20 is measured as L1. The diameter of the through hole 23 is d. The flow rate is calculated using the formula: Flow rate S = L1 * 10. -3 The water flow rate of the hydrophilic membrane can be obtained by calculating / [(π×(d / 2)²)*(t / 60)].

Claims

1. A water flux testing device, characterized in that: The system includes a storage bottle with an open bottom and an upper stopper connected to the bottle opening. The bottom of the upper stopper has a coaxial limiting section with an outer diameter larger than that of the upper stopper, and a connecting cavity is provided within the limiting section. The system also includes a collection bottle with a lower stopper at its opening. The top of the lower stopper is screwed into the connecting cavity of the limiting section, and a hydrophilic membrane is provided between the upper and lower stoppers. Liquid in the storage bottle flows into the collection bottle through the hydrophilic membrane.

2. The water flux testing device as described in claim 1, characterized in that: Both the upper and lower plugs have through holes at their centers.

3. The water flux testing device as described in claim 1, characterized in that: The outer diameter of the upper plunger increases from top to bottom.

4. The water flux testing device as described in claim 1, characterized in that: The connecting cavity and the upper and lower through holes are connected by a hydrophilic membrane and are coaxially arranged.

5. The water flux testing device as described in claim 1, characterized in that: The outer diameter of the lower plunger decreases from top to bottom.

6. The water flux testing device as described in claim 1, characterized in that: The portion of the lower plug located within the connecting cavity is a pressure plate, and the outer diameter of the pressure plate is larger than the outer diameter of the bottom portion of the lower plug.

7. The water flux testing device as described in claim 1, characterized in that: The outer wall of the collection bottle is equipped with an exhaust pipe, which is connected to a vacuum pump.

Images