CN1325148C - Detecting assemble for film products - Google Patents

Abstract

The invention relates to a membrane product detection component, which comprises a protective plate, an upper plate, a lower plate and a base which can be sequentially fixed and assembled as a whole detection component by screws through connection holes; there is a liquid flow channel in the center of the bottom surface of the upper plate, and the liquid flow channel The two sides of the upper and lower plates communicate with the liquid inlet and outlet through liquid distribution holes and liquid flow grooves respectively; there is a microporous plate and a sealing ring between the upper plate and the lower plate; The diversion groove communicates with the permeated liquid outlet on one end surface of the lower plate, which is characterized in that the upper plate is made of transparent polymer material, and the liquid inlets and outlets are respectively arranged on two symmetrical end surfaces of the upper plate; the protection A window is opened in the center of the plate 10, and the shape of the window matches the film sample to be tested. The invention has the characteristics of visibility, convenience, high efficiency and low cost, especially can visually detect and effectively control the performance of membrane products on-line in cross-flow filtration operation and simulated actual fluid dynamics.

Description

A membrane product detection component

technical field

The invention relates to a membrane product detection component, specifically a membrane product detection component mainly for detecting liquid separation membrane quality and membrane process, and the international patent main classification number is intended to be Int.Cl ⁷ .B01D 13/00.

Background technique

Various pressure-driven membrane processes can be used for the concentration or purification of dilute (aqueous or non-aqueous) solutions. The size and chemical properties of the solute particles or molecules in the liquid determine the structure of the required membrane, that is, the pore size and pore size distribution. Microfiltration and ultrafiltration membranes are mainly used to intercept particles, bacteria and macromolecules from the liquid phase to achieve purification, separation and concentration. Nanofiltration and reverse osmosis membranes are mainly used for water softening. Regardless of the purpose, membranes are a central component of every membrane process. A membrane can be viewed as a permeable selective barrier between two phases, or as an interface between two phases.

According to actual engineering needs and the development of membrane technology, on the one hand, there are various raw materials for membrane separation, and on the other hand, there are also rich and colorful membrane materials to choose from. In the process of selecting a suitable membrane material, the compatibility between the separated liquid and the membrane, the molecular size to be retained by the membrane, and the pore size of the membrane must be considered. In order to test the effect of membrane separation and the performance of a specific membrane, it is obviously not necessary to build a set of membrane devices of practical application size. In order to predict the separation effect and performance of the membrane under normal operating conditions, it is necessary to develop membrane performance or membrane product testing components.

At present, the most commonly used membrane performance or membrane product testing components are circular flat membrane components and membrane box components. For example, the C70-F circular flat membrane module developed by Nitto Denko Corporation of Japan ("Membrane Science and Technology" 24 (2004) 52) is a typical representative of the circular flat membrane module. The component is mainly made of stainless steel, and there is a cylindrical polytetrafluoroethylene block inside. The circular hole with a central diameter of 10mm is the channel for the feed liquid to enter the component and reach the surface of the membrane. The feed liquid reaches the center of the circular membrane through the hole. Then flow to the periphery of the membrane. The disadvantage of this circular flat membrane module is that it cannot approximate the hydrodynamic performance of the membrane under actual operation, nor can it provide an effective observation point for non-destructive online monitoring of the operating state of the membrane. There are many types of bellows components, including Pellicon and Minitan bellows produced by Millipore, Sartocon I and II bellows produced by Sartorius, and Felton ( Filton) Novosettc type membrane box assembly, etc. The main feature of these capsule assemblies is the seaming or heat sealing of two membranes to a single plastic sheet. Their main disadvantages are also that they cannot approximate the hydrodynamic performance of the membrane under actual operation, and these capsule components are not sufficiently sealed, easy to leak, and have high manufacturing and use costs. In addition, the above-mentioned membrane detection assembly also has the disadvantages of time-consuming and low efficiency in the process of replacing the membrane.

Although the Sepa CF I and II square flat membrane detection components produced by GE Osmonics can solve many of the shortcomings of the circular flat membrane components and membrane box components, they can approximate Simulate the hydrodynamic performance of the membrane under actual operation, but these square flat membrane detection components are difficult to observe with the naked eye the installation of the membrane sample and the operation process due to its fixed plate (top cover) is a fully sealed thick plate. At the same time, these square flat-panel membrane detection components cannot provide effective observation points, nor can they perform non-destructive measurements on the operating status or process of the membrane (such as pollution, cleaning, etc.) Technology) on-line monitoring, it is difficult to improve the quality of detection and in-depth research on the membrane process. In addition, as test instruments or test devices, these square flat membrane detection components are very heavy (about 30 kg), inconvenient to carry and use, and the cost is high, which is not conducive to popularization and use.

Contents of the invention

Aiming at the deficiencies of the prior art, the technical problem to be solved by the present invention is to design a membrane product detection component. It has the characteristics of visualization, convenience, high efficiency and low cost, especially in cross-flow filtration operation and under the simulation of actual fluid dynamics, it can visually detect the performance of membrane products online and effectively control them.

The technical solution of the present invention to solve the technical problems of the membrane product detection component is: to design a membrane product detection component, including a protective plate, an upper plate, a lower plate and a base that can be sequentially fixed and assembled as a whole detection component by screws through connecting holes; There is a liquid flow channel in the center of the bottom surface of the upper plate, and the two sides of the liquid flow channel communicate with the liquid inlet and outlet respectively through the liquid distribution hole and the liquid flow groove; there are microporous plates and sealing rings between the upper plate and the lower plate ; The lower plate of the lower part of the microporous plate has a diversion groove, and the diversion groove communicates with the permeated liquid outlet on one end surface of the lower plate. It is characterized in that the upper plate is made of a transparent polymer material, and the The liquid inlets and outlets are respectively arranged on the two symmetrical end surfaces of the upper plate; a window is opened in the center of the protective plate 10, and the shape of the window matches the film sample to be tested.

Compared with the above-mentioned prior art, first of all, because the film product detection component of the present invention has a window designed on the protective plate, and the upper plate is designed as a transparent polymer material, therefore, the detection of the film product has visibility and is convenient for observation. and monitoring, especially on-line effective observation and non-destructive on-line monitoring, that is, the performance of the membrane can be tested in the cross-flow filtration operation and under the approximate simulation of actual fluid dynamics; The liquid inlet and outlet connected by the flow channel (the inlet of the feed liquid and the outlet of the concentrated liquid) are respectively designed on the two symmetrical end faces of the upper plate, which is beneficial to the adjustment or setting of the height of the liquid flow channel, so that different flow states can be realized conveniently (laminar flow or turbulent flow), and can make the full area of the membrane work without "dead angles"; third, the membrane product detection component of the present invention is small in size, and the upper and lower plates are made of polymer materials, and the weight is lighter, so it is convenient Performance: the total weight of an embodiment of the film product detection assembly of the present invention is no more than 2 kilograms, which is easy to carry and operate, easy to detect on-line on-site, and also beneficial to be added to the equipment of the production line; fourth, the film product detection assembly of the present invention Because of its small size and light weight, it is beneficial to facilitate operation and improve efficiency, so it has high efficiency: it saves time, effort and effort, for example, it takes very little time (3-5 minutes) to change from one membrane to another membrane, and one person can do it. Operable, especially in the process of separation and purification of special feed liquids (such as precious Chinese and Western medicines), or for the test of precious membranes, only a small amount of feed liquids (such as 0.5 liter volume, existing Technology generally needs 5-25 liters) and the film product sample of very small area just can detect the quality of film product itself and performance and its separation effect to feed liquid, have higher benefit; Also therefore further improved the present invention The fifth feature of the membrane product detection module is low cost: the membrane product detection module of the present invention has the characteristics of low cost and high efficiency due to its small body, material saving, simple processing, convenient packaging and easy transportation.

Description of drawings

Fig. 1 is a schematic view of the overall shape and structure of an embodiment of the film product detection assembly of the present invention;

Fig. 2 is a schematic diagram of the shape and structure of the protective plate of an embodiment of the film product detection assembly of the present invention;

Fig. 3 is a schematic diagram of the front view shape and structure of the upper plate of an embodiment of the film product detection component of the present invention;

Fig. 4 is a schematic diagram of the side view shape and structure of the upper plate of an embodiment of the film product detection component of the present invention;

Fig. 5 is a schematic structural diagram of the front view shape of the lower plate of an embodiment of the film product detection component of the present invention;

Fig. 6 is a schematic diagram of the side view shape and structure of the lower plate of an embodiment of the film product detection component of the present invention;

Fig. 7 is a schematic diagram of the front view shape and structure of the base of an embodiment of the film product detection component of the present invention.

Fig. 8 is a schematic diagram of the overall shape and structure of another embodiment of the film product detection component of the present invention.

Detailed ways

Further describe the present invention below in conjunction with embodiment and accompanying drawing thereof:

The present invention designs a film product detection assembly (see Figures 1, 2, and 3), which includes a protective plate 10, an upper plate 20, a lower plate 40 and a base 50 that can be sequentially fixed and assembled as a whole detection assembly by screws through connecting holes; There is a liquid flow channel 26 in the center of the bottom surface of the upper plate 20, and the two sides of the liquid flow channel 26 communicate with the liquid inlets and outlets 21 and 23 through the liquid distribution holes 24 and the liquid flow grooves 25 respectively; the upper plate 20 and the lower plate 40 There is a microporous plate 30 and a sealing ring 28 between them; a diversion groove 44 is provided on the lower plate 40 of the lower part of the microorifice plate 30, and the diversion groove 44 communicates with the permeate outlet 41 on one end surface of the lower plate 40, It is characterized in that the upper plate 20 is made of transparent polymer material, and the liquid inlets and outlets 21 and 23 are respectively arranged on the two symmetrical end faces of the upper plate 20; The shape matches the tested film sample 31.

The material used in the protective plate 10 embodiment of the film product detection component of the present invention is a metal plate, such as a stainless steel plate (see FIG. 2 ), and engineering plastics can also be used. A window 11 is opened in the center of the protective plate 10, and the shape of the window 11 matches the film sample to be tested. The so-called window 11 includes two designs: one is only hollowed out; the other is hollowed out and inlaid with transparent materials. Regardless of the design, the shape and size of the window 11 should match the shape and size of the film sample to be tested, so that the film product to be tested can be observed comprehensively. The protective plate 10 together with the base 50 forms the support for the fast connection of the film product detection assembly of the present invention, and simultaneously protects the upper plate 20 and the lower plate 40 (see FIGS. 1 and 7 ). In order to connect the film product detection components, connection holes 12 need to be uniformly distributed around the protective plate. Generally, 4-20 connection holes 12 can be designed according to needs (the embodiment shown in FIG. 2 uses 4 connection holes 12, which is only for illustration and simplicity). Connectors can adopt screws (not shown in the figure). Once the position and quantity of the connecting holes 12 of the protective plate 10 are determined, the connecting holes 22, 42 and 52 of the upper plate 20, the lower plate 40 and the base 50 (see Figures 2, 3, 5 and 7) are all correspondingly designed and manufactured. .

The upper plate 20 of the membrane product detection component of the present invention is made of transparent polymer material, and the liquid inlets and outlets 21 and 23 are respectively arranged on two symmetrical end surfaces of the upper plate 20 (see FIG. 3 ). This is fundamentally different from the prior art. The upper plate 20 made of transparent polymer material, in cooperation with the protective plate 10 with the window 11, can effectively provide visibility for the present invention, conveniently and directly observe or detect the clamping of the film product sample conditions, product quality and membrane process. It is also an original invention of the present invention to arrange the liquid inlets and outlets 21, 23 on the two symmetrical end surfaces of the upper plate 20 respectively. This design can avoid the "dead angle" of liquid flow, and is beneficial to the adjustment or setting of the height of liquid flow channel 26. In the test of membrane samples, it can approximate the membrane performance under actual operating conditions, and can be used in cross-flow filtration operation and Simulations test membrane performance under hydrodynamic conditions. Since the liquid distribution hole 24, the liquid flow groove 25 and the liquid inlet and outlet 21, 23 are symmetrically designed, in actual use, any one of the liquid inlet and outlet 21, 23 can be used as the inlet of the feed liquid, And the other is used as the outlet of the concentrate, which is very convenient. It should also be noted that although the shape of the upper plate 20 in the embodiment of the present invention is a rectangle, it can completely adopt other shapes as required, such as square, racetrack, etc. After the shape design of the upper plate 20 is determined, the lower plate 40 , the protection plate 10 and the base 50 are all uniformly designed according to the shape design.

A further feature of the film product detection assembly of the present invention is a groove 43 (see Figures 5 and 6) that is provided at the center position above the lower plate 40, and the guide groove 44 is opened in the groove 43, and the micro The orifice plate 30 can be embedded in the groove 43 (see FIG. 1 ). The diversion groove 44 in the groove 43 communicates with the permeate outlet 41 on one end surface of the lower plate 40 . This design is conducive to the stability of the position of the microporous plate 30 , and then when the membrane product detection component is working, the tested membrane sample placed on the microporous plate 30 will be stable. The design of the permeate outlet 41 on the end surface of the lower plate 40 is not limited, that is, it can be on any end surface of the lower plate 40 . The shape and structure of the guide groove 44 opened in the groove 43 is not limited by the embodiment shown in Figure 5, and it can be designed in other shapes, such as "mesh" shape, "string" shape, and "back" through the center. "Forms and their modified forms, etc. The material of the lower plate 40 may be the same as that of the upper plate 20 or a different material, and is not strictly limited. The lower board 40 of the embodiment uses the same material as the upper board 20 .

The microporous plate 30 described in the membrane product detection assembly of the present invention is a support or support plate for the membrane product sample to be tested. When the membrane product detection component of the present invention is used for detection, the membrane product sample 31 can be conveniently spread on the microporous plate 30 (see FIG. 1 ). The microporous plate 30 is a commercially available product, and it is required to be flat, corrosion-resistant, easy to wash, and have micropores evenly distributed so that the permeate can be discharged smoothly.

The film product detection assembly of the present invention is the same as the general film product detection assembly, and a sealing ring 28 is designed between the upper plate 20 and the lower plate 40 . But the distinguishing feature of the present invention is that the bottom surface of the upper plate 20 is provided with an inner and outer double annular sealing groove 27 (see Fig. 3), and the sealing ring 28 is two ring-shaped, and can be matched and embedded in the Inside the inner and outer double-ring sealing grooves 27 on the bottom surface of the upper plate 20 (see FIG. 4 ). The design of the fixed double sealing ring can make the upper plate 20 and the lower plate 40 of the detection assembly realize strict sealing. Tests have shown that even at a higher operating pressure (such as 1.5MPa), the membrane product detection assembly of the present invention will not leak, therefore, the membrane product detection assembly of the present invention can be applicable to membrane separations required by various operating pressures (including microfiltration, ultrafiltration, nanofiltration and reverse osmosis) processes.

A further feature of the membrane product detection assembly of the present invention is that the liquid flow channel 26 is provided with an isolation net 32 (see FIG. 1 ). The design of this isolation net 32 can simulate and test the performance of industrial roll-type membrane under the condition of using a single or a membrane sample. Design the flow channel 26 whose height can be adjusted (through the adjustment of the tightness between the upper plate 20 and the lower plate 40) or set (the design of the depth of the liquid flow channel 26) with the isolation net 32, so that different flows of the membrane separation liquid can be realized state (such as laminar or turbulent flow). The important improvement of the present invention is that it can test the quality performance of the membrane in the cross-flow filtration operation and under the approximate simulated actual fluid dynamics.

The base 50 of the film product detection assembly of the present invention is the support body of the entire detection assembly, and at the same time cooperates with the protection plate 10 to assemble and fasten the entire detection assembly.

Another embodiment of the film product detection assembly of the present invention is characterized in that any end surface other than the liquid inlet and outlet 21 and 23 is set on the upper plate 20, and two other liquid distribution holes 24 and liquid flow channels are provided. The liquid inlets and outlets 21', 23' communicated with the tank 25 (see FIG. 8). In the same way as the liquid inlets and outlets 21, 23, although the liquid inlets and outlets 21', 23' are designed on the same side, they are not particularly limited. This "four ports" design of the membrane product detection assembly of the present invention can provide multiple combinations for testing or detection. For example, when using the liquid inlet and outlet 21 as the inlet of the feed liquid, the liquid inlet and outlet 23 can be used as the outlet of the concentrated solution. The liquid inlet and outlet 23' can also be used as the outlet of the concentrated solution, and the remaining mouth is closed; and for example, when the liquid inlet and outlet 21' is used as the inlet of the feed liquid, the liquid inlet and outlet 23 can be used as the outlet of the concentrated solution, and the liquid inlet and outlet 23' can also be used as the outlet of the concentrated solution. As the outlet of the concentrate, the rest of the mouth is closed. What kind of assembly method to use depends on the purpose or requirements of the test or inspection. It needs to be added that the further embodiment of the membrane product detection assembly of the present invention does not exclude the addition of two additional liquid distribution holes 24 and liquid flow grooves on the symmetrical side end faces of the liquid inlets and outlets 21' and 23'. The possibility of the liquid inlet and outlet 21 ", 23 " that groove 25 communicates.

The membrane product detection component of the present invention can not only be used for laboratory research on membrane products and membrane separation processes, but also can be directly installed on industrial production equipment because of its small size, low cost and remarkable effect, such as separation and purification of traditional Chinese medicine. And seawater, bitter water desalination equipment, etc., for online monitoring and detection. The membrane product detection component of the present invention is suitable for performance testing of various liquid separation membranes, including performance testing of microfiltration, ultrafiltration, nanofiltration and reverse osmosis membranes, and can be used for online detection or monitoring of biomedicine, food, and chemical production processes. It can also be used for theoretical and applied research on membrane products and membrane separation processes.

Claims (9)

1. detecting assemble for film products, comprise can by screw by connecting hole successively fixedly assembly be baffle (10), upper plate (20), lower plate (40) and the base (50) of detection components integral body; There is liquid flow path (26) in described upper plate (20) bottom center, and the both sides of liquid flow path (26) communicate with liquid gateway (21), (23) through liquid distribution hole (24) and liquid flow groove (25) respectively successively; Microwell plate (30) and sealing ring (28) are arranged between described upper plate (20) and the lower plate (40); Have guiding gutter (44) on the lower plate (40) of microwell plate (30) lower part, the liquid outlet (41) that sees through on guiding gutter (44) and lower plate (40) one end faces communicates, it is characterized in that described upper plate (20) adopts transparent polymer material, and described liquid gateway (21), (23) are separately positioned on two end faces of upper plate (20) symmetry; The center of described baffle (10) has form (11), and the shape of form (11) and tested film sample (31) are complementary.

2. detecting assemble for film products according to claim 1, it is characterized in that described upper plate (20) bottom surface has the seal groove (27) of internal and external double-circular shape, described sealing ring (28) is two of ring-type, and can mate in the seal groove (27) that is embedded in described upper plate (20) bottom surface internal and external double-circular shape.

3. detecting assemble for film products according to claim 1, it is characterized in that the groove (43) that the center has above the described lower plate (40), described guiding gutter (44) is opened in groove (43), and described microwell plate (30) can be embedded among the described groove (43).

4. according to claim 1,2 or 3 described detecting assemble for film products, it is characterized in that being provided with in the described liquid flow path (26) separation net (32).

5. according to claim 1,2 or 3 described detecting assemble for film products, any one end face that it is characterized in that being provided with on the described upper plate (20) outside described liquid gateway (21), (23) is provided with two liquid gateway (21 '), (23 ') that communicate with described liquid distribution hole (24) and liquid flow groove (25) again.

6. detecting assemble for film products according to claim 4, any one end face that it is characterized in that being provided with on the described upper plate (20) outside described liquid gateway (21), (23) is provided with two liquid gateway (21 '), (23 ') that communicate with described liquid distribution hole (24) and liquid flow groove (25) again.

7. the purposes of a detecting assemble for film products is characterized in that claim 1,2 or 3 described detecting assemble for film products are directly installed on the equipment of industrial product, is used for on-line monitoring.

8. the purposes of a detecting assemble for film products is characterized in that the described detecting assemble for film products of claim 4 is directly installed on the equipment of industrial product, is used for on-line monitoring.

9. the purposes of a detecting assemble for film products is characterized in that the described detecting assemble for film products of claim 5 is directly installed on the equipment of industrial product, is used for on-line monitoring.

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