Injection type flat scroll dynamic filter and working method

Abstract

An injection type flat scroll dynamic filter comprises an upper cover plate and a lower cover plate, wherein a liquid inlet is arranged at the center above the upper cover plate, a concentrated liquid outlet is arranged at the edge of the upper cover plate, a spiral scroll groove wall is arranged below the upper cover plate, a spiral scroll groove is formed between the spiral scroll groove walls, and a spiral scroll flow channel is formed, the head end of the spiral scroll groove is connected to the liquid inlet, the tail end of the spiral scroll groove is connected to the concentrated liquid outlet, and the outlet end of the concentrated liquid outlet is connected to the concentrated liquid guide pipe; a filtrate outlet is arranged at the center below the lower cover plate, a supporting mesh plate is arranged above the lower cover plate, a microporous filter membrane is arranged above the supporting mesh plate, and the microporous filter membrane is located between the supporting mesh plate and the spiral scroll groove wall. The injection type flat scroll dynamic filter described in the present invention has the advantages of improving the filtration efficiency of the injection filter and expanding the use of the injection filter.

Description

Technical Field

[0001] The invention relates to the technical field of biomedicine, and in particular to an injection type flat-plate scroll dynamic filter and a working method thereof. Background Art

[0002] Traditional injection filters use static dead-end filtration (or "terminal filtration"), and as the filtration process proceeds, under the action of concentration polarization, pollutants gradually deposit on the membrane surface to form a gel layer, and then gradually form a filter cake layer. This situation is called membrane fouling, which is one of the main factors affecting the effect of membrane separation technology.

[0003] There is a process for pollutants to contaminate the membrane surface. Initially, the pollutants are adsorbed and blocked in the membrane pores. Using appropriate filtration methods, optimizing operating conditions, and pre-treating the feed liquid are effective ways to alleviate membrane contamination.

[0004] Compared with dead-end filtration, dynamic filtration can significantly alleviate membrane fouling. During dynamic filtration, increasing the turbulence of the fluid and the fluid shear force on the membrane surface can help prevent the adsorption and deposition of suspended particles and colloids on the membrane surface, overcome the concentration polarization effect, and effectively reduce the attenuation rate of membrane flux.

[0005] The present invention is provided to improve the filtration efficiency of the syringe filter and to expand the application of the syringe filter. Summary of the invention

[0006] The object of the present invention is to provide an injection type flat scroll dynamic filter to solve one or more of the above-mentioned prior art problems.

[0007] According to an injection-type flat-plate volute dynamic filter of the present invention, the filter comprises an upper cover plate and a lower cover plate, a liquid inlet is centrally arranged above the upper cover plate, a concentrated liquid port is arranged at the edge of the upper cover plate, a spiral volute groove wall is arranged below the upper cover plate, a spiral volute groove is formed between the spiral volute groove walls to constitute a spiral volute flow channel, the head end of the spiral volute groove is connected to the liquid inlet, the tail end of the spiral volute groove is connected to the concentrated liquid port, and the outlet end of the concentrated liquid port is connected to the concentrated liquid guide pipe; a filtrate port is centrally arranged below the lower cover plate, a supporting mesh plate is arranged above the lower cover plate, a microporous filter membrane sheet is arranged above the supporting mesh plate, and the microporous filter membrane sheet is located between the supporting mesh plate and the spiral volute groove wall.

[0008] In some embodiments, the spiral scroll flow channel is centered on the liquid inlet, spirals outward, gradually tapers to the tail end, and is connected to the concentrate port.

[0009] In some embodiments, the concentrate port is axially tangent to, perpendicular to, or at an obtuse angle to the circumference of the filter.

[0010] In some embodiments, the liquid inlet is a female connector, the filtrate port is a male connector, and the concentrate port is a male connector.

[0011] In some embodiments, the pore size of the microporous filter membrane is 0.01 micron to 100 microns, preferably 0.03 micron, 0.1 micron, 0.2 micron, 0.45 micron, 0.65 micron, 0.8 micron, 1.2 micron, 5.03 micron, 8 micron, 10 micron, 20 micron.

[0012] In some embodiments, the microporous filter membrane is made of nylon, polyethersulfone, hydrophilic polyvinylidene fluoride, polytetrafluoroethylene, hydrophilic polytetrafluoroethylene or mixed cellulose.

[0013] In some embodiments, the concentrate guide tube is a thin and soft plastic tube, a concave joint is provided at the front end of the concentrate guide tube, which can be matched with the convex joint of the concentrate port, a convex joint is provided at the rear end of the concentrate guide tube, and a liquid flow speed regulator and a stop valve are also provided in the middle of the concentrate guide tube.

[0014] In some embodiments, the female connector is a needle plug connector or a female Luer connector, and the male connector is a syringe nipple connector or a male Luer connector.

[0015] In some embodiments, an ultrasonic welding process is used to complete the assembly of an integrally molded injection-type flat-plate scroll dynamic filter; the assembled injection-type flat-plate scroll dynamic filter and the concentrate guide tube are placed in a medical-grade polypropylene plastic bag, sealed, and then sterilized. Preferably, a cobalt-60 radiation source is used for sterilization.

[0016] A working method of an injection type flat-plate scroll dynamic filter comprises the following steps:

[0017] Step 1, connecting the concentrated liquid outlet end of the injection type flat-plate scroll dynamic filter to the head end of the concentrated liquid guide pipe;

[0018] Step 2, place the solution to be filtered into the prepared container, use a syringe to draw liquid from the container, connect the syringe nipple to the liquid inlet of the injection-type flat-plate scroll dynamic filter, place the filtrate port of the injection-type flat-plate scroll dynamic filter into the filtrate container, and place the tail end of the concentrated liquid guide tube into the solution container to be filtered or the waste liquid container;

[0019] Step 3: Adjust the liquid flow rate regulator of the concentrate guide tube as needed, push the piston of the syringe, and allow the solution to enter the spiral volute flow channel. Fluid shear force is formed between the liquid flow and the microporous filter membrane, which is conducive to preventing the adsorption and deposition of suspended particles and colloidal substances on the membrane surface, overcoming the concentration polarization effect, and effectively reducing the attenuation rate of the membrane flux;

[0020] Step 4, the filtrate is filtered out from the filtrate port of the injection type flat plate scroll dynamic filter and enters the filtrate container, and the concentrate flows out from the concentrate port of the injection type flat plate scroll dynamic filter and enters the to-be-filtered solution container through the concentrate guide pipe, and can be circulated and filtered, or enter the waste liquid container through the concentrate guide pipe for disposal;

[0021] Step 5: After the filtration is completed, collect the filtrate in the filtrate container.

[0022] Another method of working the injection type flat plate scroll dynamic filter comprises the following steps:

[0023] Step 1, connecting the concentrated liquid outlet end of the injection type flat-plate scroll dynamic filter to the head end of the concentrated liquid guide pipe;

[0024] Step 2, place the solution to be filtered into the prepared container, use a syringe to draw liquid from the container, connect the syringe nipple to the liquid inlet of the injection-type flat-plate scroll dynamic filter, place the filtrate port of the injection-type flat-plate scroll dynamic filter into the waste liquid container, and place the tail end of the concentrated liquid guide tube into the concentrated liquid container;

[0025] Step 3: Adjust the liquid flow rate regulator of the concentrate guide tube as needed, push the piston of the syringe, and allow the solution to enter the spiral volute flow channel. Fluid shear force is formed between the liquid flow and the microporous filter membrane, which is conducive to preventing the adsorption and deposition of suspended particles and colloidal substances on the membrane surface, overcoming the concentration polarization effect, and effectively reducing the attenuation rate of the membrane flux;

[0026] Step 4, the filtrate is filtered out from the filtrate port of the injection type flat plate scroll dynamic filter and enters the waste liquid container for disposal, and the concentrated liquid flows out from the concentrated liquid port of the injection type flat plate scroll dynamic filter and enters the concentrated liquid container through the concentrated liquid guide pipe;

[0027] Step 5: After the filtration is completed, the concentrate in the concentrate container is collected.

[0028] Advantages of the present invention:

[0029] 1. Compared with the traditional injection filter, the injection flat scroll dynamic filter described in the present invention changes the static dead-end filtration into dynamic filtration, improves the turbulence of the fluid, increases the fluid shear force on the membrane surface, is conducive to preventing the adsorption and deposition of suspended particles and colloidal substances on the membrane surface, overcomes the concentration polarization effect, and effectively reduces the attenuation rate of the membrane flux, which can significantly alleviate membrane pollution and increase the filtration efficiency;

[0030] 2. The injection-type flat-plate scroll dynamic filter described in the present invention can obtain both filtrate and concentrated liquid. Compared with the traditional injection filter which can only obtain filtrate, it has more uses and a wider range of applications;

[0031] 3. The spiral volute flow channel of the injection-type flat volute dynamic filter described in the present invention is centered on the liquid inlet, spirally expands outward, and gradually tapers to the tail end, which can ensure that when the syringe injects the liquid, the liquid is kept at a certain pressure, which is conducive to liquid filtration;

[0032] 4. The connection between the concentrate port and the concentrate guide tube of the injection-type flat-plate scroll dynamic filter described in the present invention adopts a Luer connector, which is more secure and will not loosen under pressure;

[0033] 5. A liquid flow rate regulator is provided in the middle of the concentrated liquid flow guide pipe described in the present invention, and the liquid flow rate regulator can be used to adjust the outflow rate of the concentrated liquid and indirectly adjust the filtration rate;

[0034] 6. The injection-type flat-plate scroll dynamic filter described in the present invention can also be used in series. Taking the use of two injection-type flat-plate scroll dynamic filters described in the present invention in series as an example, one is that the filtrate port of the front-end large-pore filter is connected to the liquid inlet of the rear-end small-pore filter, and a concentrated liquid and a filtrate containing particles of different particle size ranges can be obtained respectively; the other is that the concentrated liquid port of the front-end small-pore filter is connected to the liquid inlet of the rear-end large-pore filter through a concentrated liquid guide pipe, and a uniform filtrate with small-size impurities and large-size agglomerates removed can be obtained. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is a schematic diagram of the decomposition of an injection-type flat-plate scroll dynamic filter.

[0036] Figure 2 The figure is a top view of an upper cover plate of an injection-type flat-plate volute dynamic filter.

[0037] Figure 3 The present invention is a bottom view schematic diagram of an upper cover plate of an injection type flat-plate scroll dynamic filter.

[0038] Figure 4 This is a schematic diagram of the decomposition of the supporting mesh plate of an injection-type flat-plate scroll dynamic filter.

[0039] Figure 5 It is a partial cross-sectional view of an injection-type flat-plate scroll dynamic filter. DETAILED DESCRIPTION

[0040] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0041] like Figure 1 As shown in the figure, an injection-type flat-plate volute dynamic filter comprises an upper cover plate 1 and a lower cover plate 2, a liquid inlet 11 is arranged at the center above the upper cover plate 1, a concentrated liquid port 12 is arranged at the edge of the upper cover plate 1, a spiral volute groove wall 13 is arranged below the upper cover plate 1, a spiral volute groove is formed between the spiral volute groove walls 13, and a spiral volute flow channel is constituted, the head end of the spiral volute groove is connected to the liquid inlet 11, the tail end of the spiral volute groove is connected to the concentrated liquid port 12, and the outlet end of the concentrated liquid port 12 is connected to the concentrated liquid guide pipe 4; a filtrate port 21 is arranged at the center below the lower cover plate 2, a supporting mesh plate 3 is arranged above the lower cover plate 2, a microporous filter membrane diaphragm 31 is arranged above the supporting mesh plate 3, and the microporous filter membrane diaphragm 31 is located between the supporting mesh plate 3 and the spiral volute groove wall 13.

[0042] like Figure 2 , 3 As shown in the figure, the spiral volute flow channel is centered on the liquid inlet 11, spirally expands outward, gradually tapers to the tail end, and is connected to the concentrate port 12. The concentrate port 12 is tangent to, perpendicular to, or at an obtuse angle to the filter circumference in the axial direction. The liquid inlet 11 is a concave connector, the filtrate port 21 is a convex connector, and the concentrate port 12 is a convex connector.

[0043] like Figure 4 As shown in the figure, the pore size of the microporous filter membrane 31 is 0.01 micron to 100 microns, preferably 0.03 micron, 0.1 micron, 0.2 micron, 0.45 micron, 0.65 micron, 0.8 micron, 1.2 micron, 5.03 micron, 8 micron, 10 micron, 20 micron. The material of the microporous filter membrane 31 is one of nylon, polyethersulfone, hydrophilic polyvinylidene fluoride, polytetrafluoroethylene, hydrophilic polytetrafluoroethylene or mixed cellulose.

[0044] like Figure 5 As shown in the figure, the concentrate guide tube 4 is a thin and soft plastic tube, the head end of the concentrate guide tube is provided with a concave connector 41, which can be matched with the convex connector of the concentrate port 12, the tail end of the concentrate guide tube 4 is provided with a convex connector 42, and the middle part of the concentrate guide tube is also provided with a liquid flow speed regulator 43 and a stop valve. The concave connector is a pintle connector or a female Luer connector, and the convex connector is a syringe nipple connector or a male Luer connector.

[0045] The ultrasonic welding process is used to complete the assembly process of the one-piece injection-type flat-plate volute dynamic filter; the assembled injection-type flat-plate volute dynamic filter, together with the concentrated liquid guide tube 4, is sealed with a medical-grade polypropylene plastic bag, and then sterilized using a cobalt-60 radiation source.

[0046] The method for using the injection type flat plate scroll dynamic filter includes the following embodiments:

[0047] Example 1

[0048] A working method of an injection type flat plate scroll dynamic filter, to obtain a filtrate, comprises the following steps:

[0049] Step 1, connecting the outlet end of the concentrated liquid port 12 of the injection type flat scroll dynamic filter to the head end of the concentrated liquid guide pipe 4;

[0050] Step 2, placing the solution to be filtered into a prepared container, using a syringe to draw liquid from the container, connecting the syringe nipple to the liquid inlet 11 of the injection-type flat-plate scroll dynamic filter, placing the filtrate port 21 of the injection-type flat-plate scroll dynamic filter into the filtrate container, and placing the tail end of the concentrated liquid guide tube 4 into the solution container to be filtered or the waste liquid container;

[0051] Step 3, adjusting the liquid flow rate regulator 43 of the concentrate flow guide tube 4 as needed, pushing the piston of the syringe, so that the solution enters the spiral volute flow channel, and a fluid shear force is formed between the liquid flow and the microporous filter membrane 31, which is conducive to preventing the adsorption and deposition of suspended particles and colloidal substances on the membrane surface, overcoming the concentration polarization effect, and thus effectively reducing the attenuation rate of the membrane flux;

[0052] Step 4, the filtrate is filtered out from the filtrate port 21 of the injection type flat plate scroll dynamic filter and enters the filtrate container, and the concentrated liquid flows out from the concentrated liquid port 12 of the injection type flat plate scroll dynamic filter and enters the container for the solution to be filtered through the concentrated liquid guide pipe 4, and can be circulated and filtered, or enter the waste liquid container through the concentrated liquid guide pipe 4 for disposal;

[0053] Step 5: After the filtration is completed, collect the filtrate in the filtrate container.

[0054] Example 2

[0055] A working method of an injection type flat plate scroll dynamic filter, to obtain a concentrated liquid, comprises the following steps:

[0056] Step 1, connecting the outlet end of the concentrated liquid port 12 of the injection type flat scroll dynamic filter to the head end of the concentrated liquid guide pipe 4;

[0057] Step 2, placing the solution to be filtered into a prepared container, using a syringe to draw liquid from the container, connecting the syringe nipple to the liquid inlet 11 of the injection-type flat-plate scroll dynamic filter, placing the filtrate port 21 of the injection-type flat-plate scroll dynamic filter into a waste liquid container, and placing the tail end of the concentrated liquid guide tube 4 into the concentrated liquid container;

[0058] Step 3, adjusting the liquid flow rate regulator 43 of the concentrate flow guide tube 4 as needed, pushing the piston of the syringe, so that the solution enters the spiral volute flow channel, and a fluid shear force is formed between the liquid flow and the microporous filter membrane 31, which is conducive to preventing the adsorption and deposition of suspended particles and colloidal substances on the membrane surface, overcoming the concentration polarization effect, and thus effectively reducing the attenuation rate of the membrane flux;

[0059] Step 4, the filtrate is filtered out from the filtrate port 21 of the injection type flat plate scroll dynamic filter and enters the waste liquid container for disposal, and the concentrated liquid flows out from the concentrated liquid port 12 of the injection type flat plate scroll dynamic filter and enters the concentrated liquid container through the concentrated liquid guide pipe 4;

[0060] Step 5: After the filtration is completed, the concentrate in the concentrate container is collected.

[0061] The above is only a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several similar modifications and improvements without departing from the creative concept of the present invention, and these are also considered to be within the scope of invention protection.

Claims

1. An injection type flat scroll dynamic filter, characterized in that: The filter comprises an upper cover plate (1) and a lower cover plate (2); a liquid inlet (11) is arranged at the center of the upper part of the upper cover plate (1); a concentrated liquid outlet (12) is arranged at the edge of the upper cover plate (1); a spiral volute groove wall (13) is arranged below the upper cover plate (1); a spiral volute groove is formed between the spiral volute groove walls (13) to form a spiral volute flow channel; the head end of the spiral volute groove is connected to the liquid inlet (11); the tail end of the spiral volute groove is connected to the concentrated liquid outlet (12); the outlet end of the concentrated liquid outlet (12) is connected to the concentrated liquid guide pipe ( 4), a liquid flow rate regulator (43) and a stop valve are provided in the middle of the concentrated liquid guide pipe (4); a filtrate port (21) is provided at the center below the lower cover plate (2), a supporting mesh plate (3) is provided above the lower cover plate (2), a microporous filter membrane (31) is provided above the supporting mesh plate (3), the microporous filter membrane (31) is located between the supporting mesh plate (3) and the spiral volute groove wall (13), the spiral volute flow channel is centered on the liquid inlet (11), spirally expands outward, gradually tapers to the tail end, and is connected to the concentrated liquid port (12).

2. The injection type flat scroll dynamic filter according to claim 1, characterized in that: The liquid inlet (11) is a concave connector, the filtrate port (21) is a convex connector, and the concentrate port (12) is a convex connector.

3. The injection type flat scroll dynamic filter according to claim 1, characterized in that: The pore size of the microporous filter membrane (31) is 0.01 micrometer to 100 micrometers.

4. An injection type flat scroll dynamic filter according to claim 1 or 3, characterized in that: The microporous filter membrane (31) is made of nylon, polyethersulfone, hydrophilic polyvinylidene fluoride, polytetrafluoroethylene, hydrophilic polytetrafluoroethylene or mixed cellulose.

5. The injection type flat scroll dynamic filter according to claim 1, characterized in that: The concentrate guide tube (4) is a thin and soft plastic tube. The front end of the concentrate guide tube (4) is provided with a concave joint (41) which can be matched with the convex joint of the concentrate port (12). The rear end of the concentrate guide tube (4) is provided with a convex joint (42).

6. The injection type flat scroll dynamic filter according to claim 5, characterized in that: The female connector (41) is a pintle connector or a female Luer connector, and the male connector (42) is a syringe nipple connector or a male Luer connector.

7. The injection type flat scroll dynamic filter according to claim 1, characterized in that: The integrated injection-type flat-plate volute dynamic filter is assembled by using an ultrasonic welding process; the assembled injection-type flat-plate volute dynamic filter and the concentrated liquid guide tube (4) are placed in a medical-grade polypropylene plastic bag and sealed, and then sterilized.

8. A method for operating an injection type flat scroll dynamic filter according to any one of claims 1 to 7, characterized in that: The steps include: Step 1, connecting the concentrated liquid outlet end of the injection type flat-plate scroll dynamic filter to the head end of the concentrated liquid guide pipe; Step 2, place the solution to be filtered into the prepared container, use a syringe to draw liquid from the container, connect the syringe nipple to the liquid inlet of the injection-type flat-plate scroll dynamic filter, place the filtrate port of the injection-type flat-plate scroll dynamic filter into the filtrate container, and place the tail end of the concentrated liquid guide tube into the solution container to be filtered or the waste liquid container; Step 3: adjust the liquid flow rate regulator of the concentrate guide tube as needed, push the piston of the syringe, and allow the solution to enter the spiral volute flow channel; Step 4, the filtrate is filtered out from the filtrate port of the injection type flat plate scroll dynamic filter and enters the filtrate container, and the concentrated liquid flows out from the concentrated liquid port of the injection type flat plate scroll dynamic filter and enters the container for the solution to be filtered through the concentrated liquid guide pipe, and is circulated and filtered or enters the waste liquid container through the concentrated liquid guide pipe for disposal; Step 5: After the filtration is completed, collect the filtrate in the filtrate container.

9. A method for operating an injection type flat scroll dynamic filter according to any one of claims 1 to 7, characterized in that: The steps include: Step 1, connecting the concentrated liquid outlet end of the injection type flat-plate scroll dynamic filter to the head end of the concentrated liquid guide pipe; Step 2, place the solution to be filtered into the prepared container, use a syringe to draw liquid from the container, connect the syringe nipple to the liquid inlet of the injection-type flat-plate scroll dynamic filter, place the filtrate port of the injection-type flat-plate scroll dynamic filter into the waste liquid container, and place the tail end of the concentrated liquid guide tube into the concentrated liquid container; Step 3: adjust the liquid flow rate regulator of the concentrate guide tube as needed, push the piston of the syringe, and allow the solution to enter the spiral volute flow channel; Step 4, the filtrate is filtered out from the filtrate port of the injection type flat plate scroll dynamic filter and enters the waste liquid container for disposal, and the concentrated liquid flows out from the concentrated liquid port of the injection type flat plate scroll dynamic filter and enters the concentrated liquid container through the concentrated liquid guide pipe; Step 5: After the filtration is completed, the concentrate in the concentrate container is collected.

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