Multifunctional composite separation membrane manual device
By designing a multi-functional composite separation membrane manual device for aqueous and oily phase grooves, the interfacial polymerization on both sides of the base film is realized, solving the problem of difficult blow drying of the wind knife during the preparation of the composite film, and improving the separation effect and preparation stability of the film.
Patent Information
- Application Number
- CN202422397266.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-30
- Publication Date
- 2025-07-18
- Estimated Expiration
- 2034-09-30
AI Technical Summary
In the preparation process of composite separation membranes, it is difficult to avoid external environmental influences, especially the process of blowing drying the aqueous solution of the air knife is difficult to control, resulting in defects in the surface of the composite membrane and affecting the separation function.
A multifunctional composite separation membrane manual device is designed, including a water phase tank and an oil phase tank. It can be detached and sealed and fixed through the connector to realize the interface polymerization of the water and oil phase solution on both sides of the base film, avoiding the blow-drying process of the air knife, and directly generating a characteristic separation layer at the interface.
The stable preparation and integrity testing of composite separation membranes are achieved, the preparation process is simplified, and the separation effect and reliability of the membrane are improved.
Smart Images
Figure CN223112801U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of composite separation membranes, in particular to the structural design of a manual device for a multifunctional composite separation membrane. Background Art
[0002] Membrane technology is a new type of material separation technology. Due to its advantages of not changing the original material type, not introducing new impurity components, low energy consumption, small floor area, safety and stability, etc., it has gradually replaced traditional processes such as thermal distillation and extraction and is widely used in fields such as seawater desalination, reclaimed water reuse, lithium extraction from salt lakes, zero discharge of industrial wastewater, and salt separation.
[0003] Composite membranes are the current mainstream membrane products. Structurally, they generally include non-woven fabric, a polysulfone support layer, and a characteristic separation layer. Among them, the characteristic separation layer dominates the separation effect between salt and water, monovalent salt and polyvalent salt, and salt and small molecule organic matter. In order to improve the water production of composite membranes, the interfacial polymerization method is usually used to prepare the characteristic separation layer. It generates a polymer film at the interface through active water and oil phase monomers. The characteristic separation layer is extremely thin, generally only dozens of nanometers.
[0004] The steps for preparing the characteristic separation layer by interfacial polymerization mainly include: coating an aqueous solution on the surface of the base membrane - drying the residual aqueous solution on the surface with an air knife - coating an oil phase solution on the surface of the base membrane - drying the membrane body with hot water and then cross-linking - post-treatment cleaning; the first three steps are the synthesis stage, which controls the overall filtration effect of the composite membrane. The current mainstream process is still a staged operation, but this process will inevitably be affected by the external environment, and the process of "drying the residual aqueous solution on the surface with an air knife" is extremely difficult to control. If the operation is improper, it will cause large-scale defects on the surface of the composite membrane, resulting in the complete loss of the separation function of the membrane.
[0005] Therefore, it is an urgent technical problem to be solved at present to develop a multifunctional composite separation membrane manual device with a delicate structure, simple preparation, stability, and that can simultaneously meet the preparation of composite separation membranes and the integrity test of composite separation membranes. Summary of the Utility Model
[0006] The utility model aims at the above problems and provides a multifunctional composite separation membrane manual device with a delicate structure, simple preparation, stability, and that can simultaneously meet the preparation of composite separation membranes and the integrity test of composite separation membranes.
[0007] The technical solution of the utility model is as follows:
[0008] A multifunctional composite separation membrane manual device, comprising:
[0009] An aqueous phase tank, provided with an aqueous solution chamber with an open top; a water phase inlet is provided at a position near the bottom of the side of the aqueous phase tank, and a water phase outlet is provided at a position near the top.
[0010] The oil phase tank is provided with an oil phase solution cavity with an opening at the top; an oil phase liquid inlet is provided at a position near the bottom on the side of the oil phase tank, and an oil phase liquid outlet is provided at a position near the top.
[0011] There are a pair of sealing rings, which are respectively detachably and fixedly arranged at the openings of the water and oil phase tanks.
[0012] During use, the diaphragm is located between a pair of sealing rings, and the water phase tank and the oil phase tank are detachably and hermetically fixedly connected through a connecting member.
[0013] Specifically, a water phase connecting plate is provided at the opening of the water phase tank.
[0014] A first sealing groove adapted to the sealing ring is provided on the water phase connecting plate.
[0015] Specifically, a number of threaded holes A or through holes A are provided on the water phase connecting plate.
[0016] Specifically, an oil phase connecting plate is provided at the opening of the oil phase tank.
[0017] A second sealing groove adapted to the sealing ring is provided on the oil phase connecting plate.
[0018] Specifically, a number of through holes B or threaded holes B are provided on the oil phase connecting plate.
[0019] Specifically, the water phase tank is a glass water phase tank.
[0020] Specifically, the oil phase tank is a glass oil phase tank.
[0021] Specifically, the opening diameter of the water phase tank is equal to the opening diameter of the oil phase tank (200).
[0022] Specifically, the water phase liquid inlet is connected to a water phase pump through a water phase pipe.
[0023] Specifically, the oil phase liquid inlet is connected to an oil phase pump through an oil phase pipe.
[0024] The utility model includes a water phase tank, a diaphragm, an oil phase tank and a gasket. The water phase tank and the oil phase tank are hollow structures, that is, they can store a certain amount of water phase and oil phase solutions inside, and ensure that both sides of the base film are in contact with sufficient water and oil phase solutions during interfacial polymerization; this device can be used for the preparation and integrity detection of composite separation membranes: when used for the preparation of composite membranes, the base film used is an ultrafiltration membrane, the large pore surface faces the water phase solution, and the small pore surface faces the oil phase solution. Water and oil phase solutions are simultaneously introduced into the two tanks, and water and oil phase monomers react at the interface to form a characteristic separation layer; when used for the integrity detection of composite membranes, pure water and salt solution are respectively introduced into the water and oil phase tanks. If the liquid level of the salt solution rises, it indicates that the composite membrane has integrity. Description of the Drawings
[0025] Figure 1 is a schematic structural view of the present utility model;
[0026] Figure 2 is a three-dimensional structural view of the aqueous phase tank;
[0027] In the figure, 100 is the aqueous phase tank, 110 is the aqueous phase inlet, and 120 is the aqueous phase outlet.
[0028] 200 is the oil phase tank, 210 is the oil phase inlet, and 220 is the oil phase outlet.
[0029] 300 is the sealing ring.
[0030] 400 is the diaphragm. Specific embodiments
[0031] The following details the embodiments of the present utility model. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation to the present utility model.
[0032] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "vertical", "horizontal", etc. is based on the orientation or positional relationship shown in the drawings, and is 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 thus should not be construed as a limitation to the present utility model. In the description of the present utility model, unless otherwise specified, the meaning of "plural" is two or more.
[0033] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", "connected" 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.
[0034] In this case, the composite separation membrane refers to an organic membrane used in the field of liquid separation with a base film support layer and a characteristic separation layer structure, including nanofiltration membranes, reverse osmosis membranes, forward osmosis membranes, etc. The characteristic separation layer is prepared by an interfacial polymerization process, that is, the aqueous phase active monomer and the oil phase active monomer react at the water-oil interface to form a dense separation layer.
[0035] The present utility model will be described below with reference to FIGS. 1 and 2;
[0036] A manual device for a multifunctional composite separation membrane, comprising:
[0037] An aqueous phase tank 100, provided with an aqueous phase solution chamber having an opening at the top; an aqueous phase inlet 110 is provided at a position near the bottom of the side of the aqueous phase tank 100, and the aqueous phase inlet 110 is connected to an aqueous phase pump through an aqueous phase pipe; an aqueous phase outlet 120 is provided near the top position;
[0038] An aqueous phase connecting plate is provided at the opening of the aqueous phase tank 100;
[0039] A first sealing groove adapted to the sealing ring 300 is provided on the aqueous phase connecting plate.
[0040] A plurality of threaded holes A or through holes A are provided on the aqueous phase connecting plate.
[0041] An oil phase tank 200, provided with an oil phase solution chamber having an opening at the top; an oil phase inlet 210 is provided at a position near the bottom of the side of the oil phase tank 100, and the oil phase inlet 210 is connected to an oil phase pump through an oil phase pipe, and an oil phase outlet 220 is provided near the top position;
[0042] An oil phase connecting plate is provided at the opening of the oil phase tank 200;
[0043] A second sealing groove adapted to the sealing ring 300 is provided on the oil phase connecting plate.
[0044] A plurality of through holes B or threaded holes B are provided on the oil phase connecting plate; when a plurality of through holes B are provided on the oil phase connecting plate, a plurality of corresponding threaded holes A are provided on the aqueous phase connecting plate; conversely, when a plurality of through holes A are provided on the aqueous phase connecting plate, a plurality of corresponding threaded holes B are provided on the oil phase connecting plate.
[0045] In this case, the aqueous phase tank 100 and the oil phase tank 200 are made of glass material respectively to avoid being corroded by the oil phase solvent during the interfacial polymerization operation, and the opening diameters of the aqueous phase tank 100 and the oil phase tank 200 are equal.
[0046] A sealing ring 300, provided in a pair, is respectively detachably and fixedly provided at the openings of the aqueous and oil phase tanks; in this case, the sealing ring 300 is made of rubber material;
[0047] During use, the membrane 400 is located between a pair of sealing rings 300, and the aqueous phase tank 100 and the oil phase tank 200 are detachably and hermetically fixedly connected through a connecting member. If it is used for the preparation of a composite membrane, the membrane 400 used is an ultrafiltration membrane, with the large pore surface facing the aqueous phase solution and the small pore surface facing the oil phase solution; if it is used for the integrity detection of the composite membrane, the characteristic separation layer faces the pure aqueous solution and the large pore layer faces the salt solution.
[0048] The specific use steps are as follows:
[0049] When used for the preparation of composite separation membranes:
[0050] a. Clean the aqueous phase tank 100 and the oil phase tank 200, and dry them with nitrogen.
[0051] b. Prepare an aqueous solution of 2 wt% m-phenylenediamine and a n-hexane oil phase solution of 0.1% trimesoyl chloride, and place them in the corresponding beakers.
[0052] c. Take an ultrafiltration membrane as the support layer of the composite separation membrane, and cut it into the same size as the rubber gasket.
[0053] d. Assemble according to the device structure diagram shown in the appendix. It should be noted that the ultrafiltration membrane is placed according to the principle that the large pore surface faces the aqueous solution and the small pore surface faces the oil phase solution. Figure 1 shown in the device structure diagram, and it should be noted that the ultrafiltration membrane is placed according to the principle that the large pore surface faces the aqueous solution and the small pore surface faces the oil phase solution;
[0054] e. Use a pump to pump the aqueous solution out of the beaker, into the aqueous phase tank 100, and return it to the beaker from the liquid outlet.
[0055] f. Use a pump to pump the oil phase solution out of the beaker, into the oil phase tank 200, and return it to the beaker from the liquid outlet.
[0056] g. According to the manual test time, complete the circulation of the water and oil phase solutions, disassemble the device, and the interfacial polymerization is completed.
[0057] In the interfacial polymerization process of the device in this case, the water and oil phase solutions diffuse and contact from both sides of the base membrane and form a polyamide separation layer, rather than the traditional process where the water and oil phases must be coated on the same side of the base membrane, effectively avoiding the process of air knife drying.
[0058] For the integrity test of the composite separation membrane:
[0059] a. Clean the aqueous phase tank 100 and the oil phase tank 200, and dry them with nitrogen.
[0060] b. Prepare a 10 wt% aqueous sodium chloride solution.
[0061] c. Take a composite reverse osmosis membrane sheet and cut it into the same size as the rubber gasket.
[0062] d. Assemble according to the device structure diagram shown in the appendix and place it horizontally. It should be noted that the composite reverse osmosis membrane is placed according to the principle that the characteristic separation layer faces the pure aqueous solution and the large pore layer faces the salt solution. Figure 1 shown in the device structure diagram and place it horizontally, and it should be noted that the composite reverse osmosis membrane is placed according to the principle that the characteristic separation layer faces the pure aqueous solution and the large pore layer faces the salt solution;
[0063] e. Block the liquid inlets of the aqueous phase tank 100 and the oil phase tank 200, and inject pure water and salt solution of the same height into the two tanks respectively.
[0064] f. Observe the height difference between the two tanks in the device after standing still for 24 hours. If the liquid level of the obvious salt solution is higher than that of the pure aqueous solution, it indicates that the composite reverse osmosis membrane has good integrity.
[0065] Regarding the content disclosed in this case, the following points need to be explained:
[0066] (1). The attached drawings of the embodiments disclosed in this case only relate to the structures involved in the embodiments disclosed in this case, and other structures can refer to the general design;
[0067] (2). Without conflict, the embodiments disclosed in this case and the features in the embodiments can be combined with each other to obtain new embodiments;
[0068] The above is only the specific implementation manner disclosed in this case, but the protection scope of this disclosure is not limited thereto. The protection scope disclosed in this case shall be subject to the protection scope of the claims.
Claims
1. A manual device for a multifunctional composite separation membrane, characterized in that Comprising: An aqueous phase tank (100) provided with an aqueous phase solution chamber having an open top; At a position near the bottom of the side of the aqueous phase tank (100), there is an aqueous phase inlet (110), and at a position near the top, there is an aqueous phase outlet (120); An oil phase tank (200) provided with an oil phase solution chamber having an open top; at a position near the bottom of the side of the oil phase tank (200), there is an oil phase inlet (210), and at a position near the top, there is an oil phase outlet (220); Sealing rings (300), a pair of which are respectively detachably and fixedly arranged at the openings of the aqueous and oil phase tanks; During use, a diaphragm (400) is located between a pair of sealing rings (300), and the aqueous phase tank (100) and the oil phase tank (200) are detachably and hermetically fixedly connected through a connecting member.
2. The manual device for a multifunctional composite separation membrane according to claim 1, wherein At the opening of the aqueous phase tank (100), there is an aqueous phase connecting plate; On the aqueous phase connecting plate, there is a first sealing groove adapted to the sealing ring (300).
3. The manual device of a multifunctional composite separation membrane according to claim 2, characterized in that, On the aqueous phase connecting plate, there are a number of threaded holes A or through holes A.
4. A manual device for a multi-functional composite separation membrane according to claim 1, characterized in that, At the opening of the oil phase tank (200), there is an oil phase connecting plate; On the oil phase connecting plate, there is a second sealing groove adapted to the sealing ring (300).
5. The manual device for a multifunctional composite separation membrane according to claim 4, characterized in that, On the oil phase connecting plate, there are a number of through holes B or threaded holes B.
6. The manual device for a multifunctional composite separation membrane according to claim 1, characterized in that, The aqueous phase tank (100) is a glass aqueous phase tank.
7. A manual device for a multifunctional composite separation membrane according to claim 1, characterized in that, The oil phase tank (200) is a glass oil phase tank.
8. A manual device for a multifunctional composite separation membrane according to claim 1, characterized in that, The opening diameter of the aqueous phase tank (100) is equal to the opening diameter of the oil phase tank (200).
9. A manual device for a multifunctional composite separation membrane according to claim 1, wherein The aqueous phase inlet (110) is connected to an aqueous phase pump through an aqueous phase pipe.
10. A manual device for a multifunctional composite separation membrane according to claim 1, characterized in that, The oil phase inlet (210) is connected to an oil phase pump through an oil phase pipe.