Membrane tube water flux measuring device

Abstract

The utility model relates to the technical field of ceramic membrane tube detection, in particular to a membrane tube water flux measuring device which comprises a circulating tank, the input end of the circulating pump is connected with the circulating tank; the membrane shell is connected with the output end of the circulating pump, a membrane pipe is mounted in the membrane shell, and the top of the membrane shell is connected with the circulating tank; the precipitation tank is connected with the side wall of the membrane shell; and a precipitation flowmeter is arranged between the precipitation tank and the membrane shell. Full-course automatic measurement is achieved through the circulating pump, the precipitation flowmeter and the multiple pressure gauges, manual timing, water pouring and weighing are not needed in the testing process, the labor intensity of workers is reduced, the working efficiency is improved, pressure values, flow and timing of all positions are automatically recorded through the PLC, accurate control over the whole system can be conducted, and errors generated by manual operation are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of ceramic membrane tube detection, in particular to a device for measuring membrane tube water flux. Background Art

[0002] Ceramic membrane is a new type of efficient separation, concentration and purification technology with certain chemical stability and high temperature resistance. Ceramic membrane is made of materials such as aluminum oxide, titanium oxide, zirconium oxide and silicon oxide through high temperature firing. It has the characteristics of high purity, high filtration accuracy and no added chemicals. Ceramic membrane can withstand high temperature and high acid and alkali environment, and is also highly stable to chemical agents and pH values. In the application process, since the ceramic membrane element is an asymmetric structure, backwashing can be used to further remove pollutants on the membrane surface and in the membrane pores. Ceramic membrane also has high structural stability, does not deform under pressure operation, can withstand the wear caused by solid particles in the solution, and has the advantages of good flux stability, high product quality and high recovery rate.

[0003] The above is an introduction to the outstanding advantages of ceramic membranes. They have been successfully applied in many fields such as food, beverages, plant (drug) deep processing, biomedicine, fermentation, fine chemicals, etc. They can be used for separation, clarification, purification, concentration, sterilization, desalination, etc. in the process.

[0004] Ceramic membrane separation is a screening process related to pore size, which adopts dynamic cross-flow filtration method: the raw liquid circulates at high speed in the pores of the ceramic membrane through a circulating pump. Under the action of pressure, the clarified permeate passes through the ceramic diaphragm and the porous ceramic matrix, and permeates the membrane outward in a direction perpendicular to it. The concentrated liquid is retained by the membrane and flows at high speed in the pores, causing turbulence, continuously flushing the inner surface of the ceramic diaphragm, taking away a small amount of sediment attached to the filter membrane, and maintaining a stable outflow of clear liquid, so as to achieve the purpose of separation, concentration and purification of the fluid.

[0005] However, there is currently a lack of effective means to measure the water flux of ceramic membranes. Utility Model Content

[0006] The technical problem to be solved by the utility model is: in order to solve the technical problem in the prior art, the utility model provides a device for measuring the water flux of a membrane tube.

[0007] The utility model solves the technical problem by adopting the following technical solution: a device for measuring water flux of a membrane tube, comprising a circulation tank; a circulation pump, wherein the input end of the circulation pump is connected to the circulation tank; a membrane shell, wherein the membrane shell is connected to the output end of the circulation pump, a membrane tube is installed in the membrane shell, and the top of the membrane shell is connected to the circulation tank; a precipitation tank, wherein the precipitation tank is connected to the side wall of the membrane shell; and a precipitation flowmeter is arranged between the precipitation tank and the membrane shell.

[0008] The utility model discloses a device for measuring the water flux of a membrane tube, which realizes the circulation of materials from a circulation tank to a membrane shell and from the membrane shell back to the circulation tank through a circulation pump, and measures the flow rate of materials from the membrane tube entering the precipitation tank through a precipitation flowmeter, thereby effectively measuring the water flux of the membrane tube.

[0009] Furthermore, the membrane shell is connected to the pipeline through a TC quick clamp.

[0010] Furthermore, an electric heating tube is provided in the circulation tank.

[0011] Furthermore, a temperature probe is provided inside the circulation tank, and a temperature controller is provided outside the circulation tank. The temperature controller is electrically connected to the temperature probe and the electric heating tube.

[0012] Furthermore, a circulation pipeline regulating valve is provided between the top of the membrane shell and the circulation tank.

[0013] Furthermore, a pre-membrane pressure gauge is provided between the bottom of the membrane shell and the circulation tank, and a post-membrane pressure gauge is provided between the top of the membrane shell and the circulation tank.

[0014] Furthermore, a precipitation regulating valve is provided between the membrane shell and the precipitation tank.

[0015] Furthermore, a precipitation pressure gauge is provided between the membrane shell and the precipitation tank.

[0016] Furthermore, the circulation tank is connected to a first drain valve, and the first drain valve is connected to the lowest point of the circulation tank.

[0017] Furthermore, a second drain valve is provided below the membrane shell, and the second drain valve is connected to the circulation tank.

[0018] The beneficial effects of the utility model are:

[0019] 1. The whole process is automatically measured through the circulation pump, precipitation flow meter and multiple pressure gauges. No manual timing, pouring water and weighing are required during the test process, which reduces the labor intensity and improves the work efficiency. The pressure value, flow rate and timing at each location are automatically recorded through PLC, which can accurately control the whole system and avoid errors caused by manual operation.

[0020] 2. The membrane shell is connected to the pipeline through a TC quick card, which is convenient and quick to install, greatly saving the speed of replacing the membrane tube to be tested. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0022] Figure 1 It is a schematic diagram of the overall structure of the measuring device for membrane tube water flux in the utility model.

[0023] In the figure: 1. circulation tank; 11. first pipeline; 12. circulation pump; 13. electric heating tube; 14. temperature probe; 15. temperature controller; 16. first drain valve; 17. second drain valve; 2. membrane shell; 21. second pipeline; 22. precipitation pipeline; 23. precipitation flow meter; 24. circulation pipeline regulating valve; 25. pressure gauge before membrane; 26. pressure gauge after membrane; 27. precipitation regulating valve; 28. precipitation pressure gauge; 3. precipitation tank. DETAILED DESCRIPTION

[0024] Now the utility model is further described in detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the utility model in a schematic manner, and therefore only show the components related to the utility model.

[0025] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more. In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] The utility model discloses a device for measuring the water flux of a membrane tube.

[0027] Reference Figure 1A device for measuring water flux of a membrane tube comprises a circulation tank 1, a first pipeline 11 is connected to the circulation tank 1, a membrane shell 2 is connected to the end of the first pipeline 11 away from the circulation tank 1, a membrane tube is arranged in the membrane shell 2, a circulation pump 12 is arranged on the first pipeline 11, a second pipeline 21 is connected to the top of the membrane shell 2, and the other end of the second pipeline 21 is connected to the circulation tank 1. A precipitation pipeline 22 is connected to the side wall of the membrane shell 2, the other end of the precipitation pipeline 22 is connected to the precipitation tank 3, and a precipitation flowmeter 23 is arranged on the precipitation pipeline 22.

[0028] During operation, the circulation pump 12 is used to realize the circulation of materials from the circulation tank 1 to the membrane shell 2 and from the membrane shell 2 back to the circulation tank 1. At the same time, the precipitation flowmeter 23 is used to measure the flow rate of materials entering the precipitation tank 3 from the membrane tube, thereby effectively measuring the water flux of the membrane tube.

[0029] Specifically, an electric heating tube 13 and a temperature probe 14 are installed in the circulation tank 1, and a temperature controller 15 is provided outside the circulation tank 1. The temperature controller 15 is electrically connected to the temperature probe 14 and the electric heating tube 13. The electric heating tube 13 is convenient for heating the material in the circulation tank 1, and the temperature probe 14 is convenient for real-time monitoring of the temperature of the material in the circulation tank 1, and sending the temperature signal to the temperature controller 15, and the temperature controller 15 controls the electric heating tube 13, thereby keeping the temperature of the material in the circulation tank 1 within a set range. The temperature controller 15 can adopt a high-precision PID temperature controller 15.

[0030] More specifically, the circulation tank 1 is connected with a first drain valve 16, which is connected to the lowest point of the circulation tank 1, so as to drain the materials in the circulation tank 1. The first pipeline 11 is installed with a second drain valve 17, which is connected to the circulation tank 1, so as to drain the materials in the first pipeline 11, the second pipeline 21 and the membrane housing 2 into the circulation tank 1.

[0031] A circulation pipeline regulating valve 24 is installed on the second pipeline 21 to adjust the flow of the second pipeline 21. A pre-membrane pressure gauge 25 is also installed on the first pipeline 11, and a post-membrane pressure gauge 26 is installed on the second pipeline 21. A precipitation regulating valve 27 and a precipitation pressure gauge 28 are installed on the precipitation pipeline 22.

[0032] The membrane shell 2 is connected to the first pipeline 11, the second pipeline 21, and the precipitation pipeline 22 through TC quick cards, which is convenient and quick to install, greatly saving the speed of replacing the membrane shell 2 to be tested.

[0033] The solution in this embodiment generally uses two measurement methods, one is a method for testing the precipitation pipeline 22 without holding back pressure, and the other is a method for measuring the transmembrane pressure difference.

[0034] First, an example is given to illustrate the working process of the non-pressure holding test method of the precipitation pipeline 22: the temperature controller 15 sets the intermediate value to 27.5°C, and turns on the electric heating tube 13 to ensure that the material temperature of the circulation tank 1 is between 25 and 30°C. Then, the circulation pipeline regulating valve 24 and the precipitation regulating valve 27 are fully opened, and the circulation pump 12 is turned on and runs for a period of time to completely wet the ceramic membrane tube. Then adjust the opening of the circulation pipeline regulating valve 24 so that the readings of the pressure gauge 25 before the membrane and the pressure gauge 26 after the membrane are around 1 bar. Usually, the reading of the pressure gauge 25 before the membrane will be slightly larger than the reading of the pressure gauge 26 after the membrane. At this time, the precipitate will flow out of the precipitate pipeline to the precipitate tank 3. After running for a while, when the data is stable, start timing and record each value. Then, the actual measurement data of the water flux NWP of the membrane tube is the flow measured by the precipitation flowmeter 23 divided by the filtration area of ​​the membrane tube.

[0035] Secondly, an example is given to illustrate the working process of the transmembrane pressure difference measurement method: the temperature controller 15 sets the intermediate value to 27.5°C, and the electric heating tube 13 is turned on to ensure that the water temperature of the circulation tank 1 is between 25 and 30°C. Then, the circulation pipeline regulating valve 24 and the precipitation end regulating valve are fully opened, and the circulation pump 12 is turned on and operated for a period of time to completely wet the ceramic membrane tube. Since the transmembrane pressure difference = (pressure value before the membrane + pressure value after the membrane) / 2-pressure value at the precipitation end, the opening of the circulation pipeline regulating valve 24 and the precipitation regulating valve 27 are adjusted at the same time so that the transmembrane pressure difference is around 1.5 bar. Usually, the reading of the pressure gauge 25 before the membrane will be slightly greater than the reading of the pressure gauge 26 after the membrane. The pressure value before the membrane needs to be controlled within 6 bar. At this time, the dialysate will flow out of the precipitation management. After running for a while, when the data is stable, start timing and record each value. Then, the actual measurement data of the water flux NWP of the membrane tube is the flow rate of the precipitation flowmeter 23 / filtration area of ​​the membrane tube / transmembrane pressure difference.

[0036] After testing the water flux using the two methods above, we found that the measured water flux data were not much different, which shows that this solution is practical and effective.

[0037] Working principle: The circulating pump 12, precipitation flow meter 23 and multiple pressure gauges are used to achieve full automatic measurement. The test process does not require manual timing, pouring water and weighing, which reduces the intensity of manual labor and improves work efficiency. The pressure value, flow rate and timing at each location are automatically recorded by PLC, which can accurately control the entire system and avoid errors caused by manual operation. The membrane shell 2 is connected to the pipeline through a TC quick card, which is easy and quick to install, greatly saving the speed of replacing the membrane tube to be tested.

[0038] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without deviating from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A device for measuring membrane tube water flux, characterized in that: include Circulation tank (1); A circulation pump (12), wherein an input end of the circulation pump (12) is connected to the circulation tank (1); A membrane shell (2), the membrane shell (2) being connected to the output end of a circulation pump (12), a membrane tube being installed in the membrane shell (2), and the top of the membrane shell (2) being connected to a circulation tank (1); A precipitation tank (3), wherein the precipitation tank (3) is connected to the side wall of the membrane shell (2); A precipitation flow meter (23) is provided between the precipitation tank (3) and the membrane shell (2).

2. The device for measuring membrane tube water flux according to claim 1, characterized in that: The membrane shell (2) is connected to the pipeline via a TC quick clamp.

3. The device for measuring membrane tube water flux according to claim 1, characterized in that: An electric heating pipe (13) is provided in the circulation tank (1).

4. The device for measuring membrane tube water flux according to claim 3, characterized in that: A temperature probe (14) is provided inside the circulation tank (1), and a temperature controller (15) is provided outside the circulation tank (1). The temperature controller (15) is electrically connected to the temperature probe (14) and the electric heating tube (13).

5. The device for measuring membrane tube water flux according to claim 1, characterized in that: A circulation pipeline regulating valve (24) is provided between the top of the membrane shell (2) and the circulation tank (1).

6. The device for measuring membrane tube water flux according to claim 1, characterized in that: A membrane front pressure gauge (25) is provided between the bottom of the membrane shell (2) and the circulation tank (1), and a membrane rear pressure gauge (26) is provided between the top of the membrane shell (2) and the circulation tank (1).

7. The device for measuring membrane tube water flux according to claim 6, characterized in that: A precipitation regulating valve (27) is provided between the membrane shell (2) and the precipitation tank (3).

8. The device for measuring membrane tube water flux according to claim 7, characterized in that: A precipitation pressure gauge (28) is provided between the membrane shell (2) and the precipitation tank (3).

9. The device for measuring membrane tube water flux according to claim 1, characterized in that: The circulation tank (1) is connected to a first drain valve (16), and the first drain valve (16) is connected to the lowest point of the circulation tank (1).

10. The device for measuring membrane tube water flux according to claim 1, characterized in that: A second drain valve (17) is provided below the membrane shell (2), and the second drain valve (17) is connected to the circulation tank (1).

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