Method and device for testing integrity of fibrous membrane of plasma separator

Abstract

The invention provides a method and a device for testing the integrity of a fibrous membrane of a plasma separator, the testing method comprises the plasma separator, the plasma separator is internally provided with an intra-membrane channel and an extra-membrane channel, the intra-membrane channel and the extra-membrane channel are communicated through a membrane hole, and the testing method comprises the following steps: discharging gas in the plasma separator; injecting water into the plasma separator in a transmembrane manner; applying fluctuation pressure to the intra-membrane channel and the extra-membrane channel at the same time; discharging water in the in-membrane channel; testing the integrity of a fibrous membrane in the plasma separator by using a pressure drop method; the device comprises a plasma separator and a fluctuation pressure source, the plasma separator is provided with an intra-membrane channel and an extra-membrane channel, the intra-membrane channel and the extra-membrane channel are communicated through a membrane hole, the plasma separator is connected with a first pipeline and a second pipeline, the first pipeline is communicated with the intra-membrane channel and the fluctuation pressure source, and the second pipeline is communicated with the fluctuation pressure source. The second pipeline is respectively communicated with the out-of-membrane channel and the fluctuation pressure source; the device can effectively and efficiently detect whether the fiber membrane is damaged or not.

Description

Technical Field

[0001] The invention relates to the field of detection technology, and in particular to a method and device for testing the integrity of a fiber membrane of a plasma separator. Background Art

[0002] The disposable membrane plasma separator is a medical device used for blood transfusion, dialysis and extracorporeal circulation. It uses membrane separation technology to filter out white blood cells, red blood cells and other cell components in the blood to retain plasma components. This product is widely used in a variety of clinical occasions, such as clinical plasma exchange, hemodialysis, intensive care, etc. The fiber membrane is an important component of the plasma separator, and the quality of the fiber membrane is crucial.

[0003] Although the existing water injection gas inspection technology has mature process technology and equipment for testing the membrane integrity of dialyzer products, the membrane pores of the fiber membrane in the plasma separator are 100 times larger than those of the dialyzer. The existing water injection gas inspection technology cannot effectively lubricate the membrane and seal the larger membrane pores, resulting in the failure of the water injection gas inspection technology when testing whether the fiber membrane of the plasma separator is damaged. Summary of the invention

[0004] The first object of the present invention is to provide a method for testing the integrity of a fiber membrane of a plasma separator which can effectively detect whether the fiber membrane is damaged.

[0005] The second object of the present invention is to provide a fiber membrane integrity testing device for a plasma separator that can implement the above-mentioned testing method.

[0006] In order to achieve the above-mentioned first purpose, the present invention provides a method for testing the integrity of a fiber membrane of a plasma separator, including a plasma separator, wherein an inner membrane channel and an outer membrane channel are provided in the plasma separator, and the inner membrane channel and the outer membrane channel are connected through membrane pores. The method for testing the integrity of a fiber membrane of a plasma separator comprises the following steps: Exhaust the gas in the plasma separator; Inject water across the membrane into the plasma separator to lubricate the fiber membrane; Apply fluctuating pressure to the channels inside and outside the membrane at the same time to force water into the membrane pores; Discharge the water in the channels within the membrane; The integrity of the fiber membrane in the plasma separator was tested using the pressure drop method.

[0007] It can be seen from the above scheme that by discharging the gas in the plasma separator before the test and performing transmembrane water injection, the membrane pores of the fiber membrane in the plasma separator are filled with water, and then fluctuating pressure is applied to the membrane channel and the membrane channel at the same time. The use of fluctuating pressure can better promote the flow of water, so as to quickly press water into all membrane pores, further ensure that the membrane pores are full of water, and conveniently use the surface tension of water to block the membrane pores of the fiber membrane, which not only achieves the effect of fully moistening the membrane, but also saves time and cost, and improves the test efficiency; by discharging excess water in the membrane channel before the test, it is avoided that excess water affects the normal progress of subsequent tests, and the accuracy of subsequent pressure drop method tests is ensured. The present invention can more accurately control the flow of water inside the plasma separator, and avoid damage to the fiber membrane due to excessive or too small water flow.

[0008] In a further embodiment, the step of simultaneously applying fluctuating pressure to the intra-membrane channel and the extra-membrane channel comprises: Fluctuating media is supplied to the channel inside the membrane and the channel outside the membrane at the same time through a fluctuating pressure source, so that the pressure of the channel inside the membrane is equal to the pressure of the channel outside the membrane at the same time.

[0009] It can be seen from the above scheme that through the above setting, it is ensured that the pressure of the channel inside the membrane is always equal to the pressure of the channel outside the membrane at the same time, ensuring the pressure balance on both sides of the fiber membrane, avoiding damage to the fiber membrane due to excessive force, which is beneficial to improving the service life of the fiber membrane.

[0010] A further solution is that the fluctuating pressure fluctuates within a first preset pressure range at a preset period, and the fluctuating pressure is a fluctuating air pressure or a fluctuating water pressure.

[0011] A further solution is that the plasma separator is provided with a first intra-membrane connecting end and an extra-membrane connecting end, the first intra-membrane connecting end is connected to the first end of the intra-membrane channel, and the extra-membrane connecting end is connected to the first end of the extra-membrane channel; the first intra-membrane connecting end and the extra-membrane connecting end are both connected to the same fluctuating pressure source, and when the second end of the intra-membrane channel and the second end of the extra-membrane channel are both closed, the fluctuating pressure source supplies fluctuating media to the first intra-membrane connecting end and the extra-membrane connecting end at a preset period.

[0012] A further solution is that the plasma separator is further provided with a second intra-membrane communicating end, the second intra-membrane communicating end is communicated with the second end of the intra-membrane channel, the second intra-membrane communicating end is connected to a wastewater collector, and the first intra-membrane communicating end is also connected to a pressure-stabilizing gas source; The steps of discharging water from the intra-membrane channel include: When both ends of the extramembrane channel are closed, gas is introduced into the first intramembrane connecting end through a stabilized pressure gas source to discharge water in the intramembrane channel from the second intramembrane connecting end to a wastewater collector.

[0013] It can be seen from the above scheme that, through the above arrangement, the excess water in the membrane channel is discharged before the test without affecting the water in the membrane pores, thereby ensuring the accuracy of the pressure drop method test.

[0014] A further solution is that the second membrane inner connecting end is also connected to a water storage container, and the membrane outer connecting end is sequentially connected to a gas washing bottle and a vacuum generator; The steps of injecting water across the membrane into the plasma separator include: When the first end of the intramembrane channel and the second end of the extramembrane channel are both closed, the vacuum generator is started to create a pressure difference between the washing bottle and the plasma separator. The pressure difference injects water in the water storage container into the intramembrane channel from the second intramembrane connecting end, and then the water passes through the membrane pores of the fiber membrane and fills the extramembrane channel.

[0015] It can be seen from the above scheme that through the above setting, the pressure difference generated by the vacuum generator is utilized to first suck water into the channel inside the membrane, and then the water passes through the membrane pores to fill the channel outside the membrane, thereby facilitating cross-membrane water injection and helping to improve the membrane lubrication effect.

[0016] A further solution is that the outer communicating end of the membrane is also connected to a pressure detector; The steps for testing the integrity of the fiber membrane in the plasma separator using the pressure drop method include: connecting the second membrane inner communication end with the wastewater collector; When the first end of the inner channel and the second end of the outer channel are both closed, gas is supplied to the outer channel through a pressure-stabilized gas source, and when the gas pressure reaches a first preset threshold, the gas supply is stopped and maintained for a first preset time; Detect the current air pressure value through the pressure detector; Comparing the difference between the first preset threshold and the current air pressure value; It is determined whether the difference is less than or equal to the preset pressure difference. If so, it is determined that the fiber membrane is intact.

[0017] It can be seen from the above scheme that through the above setting, by comparing the difference between the first preset threshold and the current air pressure value, it is determined whether the difference is less than or equal to the preset pressure difference. If so, it can be determined that the fiber membrane is intact and not broken.

[0018] In a further embodiment, the step of discharging gas from the plasma separator comprises: connecting the second membrane inner communication end with the water storage container; When the second end of the extramembrane channel is closed, the vacuum generator is started to generate a pressure difference between the gas washing bottle and the plasma separator. The pressure difference injects the water in the water storage container into the intramembrane channel from the second intramembrane connecting end. Then the water can be divided into two paths. The first path flows from the second end of the intramembrane channel to the first end thereof and discharges the gas in the intramembrane channel. The second path passes through the membrane pores of the fiber membrane, fills the extramembrane channel and flows to the first end of the extramembrane channel to discharge the gas in the extramembrane channel.

[0019] It can be seen from the above scheme that through the above arrangement, the pressure difference generated by the vacuum generator is utilized to first suck water into the channel inside the membrane to discharge the gas in the channel inside the membrane. At the same time, water passes through the membrane pores and fills the channel outside the membrane, which facilitates the discharge of gas in the membrane pores and the channel outside the membrane, thereby ensuring the exhaust effect.

[0020] In order to achieve the above-mentioned second purpose, the present invention provides a fiber membrane integrity testing device for a plasma separator, including a plasma separator and a fluctuating pressure source, wherein an intra-membrane channel and an extra-membrane channel are arranged in the plasma separator, and the intra-membrane channel and the extra-membrane channel are connected through membrane pores, and the plasma separator is connected with a first pipeline and a second pipeline, the first pipeline is respectively connected to the intra-membrane channel and the fluctuating pressure source, and the second pipeline is respectively connected to the extra-membrane channel and the fluctuating pressure source.

[0021] It can be seen from the above scheme that through the above setting, it is convenient to apply fluctuating pressure to the inner channel and the outer channel of the membrane at the same time through the fluctuating pressure source, so as to quickly and conveniently press water into the membrane pores to achieve the effect of fully lubricating the membrane, which is beneficial to improve the accuracy of subsequent tests, save time and cost, and improve work efficiency.

[0022] A further solution is to further include a pressure-stabilizing gas source and a wastewater collector, wherein the pressure-stabilizing gas source is connected to a third pipeline connected to the membrane channel, and the wastewater collector is connected to a fourth pipeline connected to the membrane channel.

[0023] It can be seen from the above scheme that, through the above setting, the excess water in the membrane channel is discharged before the test to ensure the normal progress of subsequent tests, which is conducive to improving the accuracy of the test.

[0024] A further solution is that it also includes a water storage container, a gas washing bottle and a vacuum generator, the water storage container is connected to a fifth pipeline, the fifth pipeline is connected to the inner membrane channel, the gas washing bottle is connected to a sixth pipeline and a seventh pipeline, the sixth pipeline is connected to the outer membrane channel, and the seventh pipeline is connected to the vacuum generator.

[0025] It can be seen from the above scheme that the above arrangement facilitates trans-membrane water injection, which is beneficial to improving the membrane lubrication effect.

[0026] A further solution is that it also includes a pressure-stabilizing gas source, a pressure detector and a wastewater collector, the pressure-stabilizing gas source is connected to a third pipeline, the pressure detector is connected to the third pipeline, the third pipeline is connected to the extramembrane channel, the wastewater collector is connected to a fourth pipeline, and the fourth pipeline is connected to the intramembrane channel.

[0027] It can be seen from the above scheme that, through the above setting, it is convenient to use the pressure drop method to test the integrity of the fiber membrane.

[0028] A further solution is that it also includes a water storage container, a gas washing bottle and a vacuum generator. The water storage container is connected to a fifth pipeline, the fifth pipeline is connected to the inner channel of the membrane, the gas washing bottle is connected to a sixth pipeline and a seventh pipeline, the sixth pipeline is respectively connected to the inner channel of the membrane and the outer channel of the membrane, and the seventh pipeline is connected to the vacuum generator.

[0029] It can be seen from the above scheme that through the above arrangement, the pressure difference is generated by the vacuum effect, and the water in the water storage container is injected into the membrane inner channel and the membrane outer channel to discharge the gas in the plasma separator, ensuring subsequent efficient water injection. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a flowchart of an embodiment of the testing method of the present invention.

[0031] Figure 2 It is a schematic diagram of the structure of the test device embodiment of the present invention when exhausting.

[0032] Figure 3 It is a schematic diagram of the structure of the test device embodiment of the present invention when injecting water across the membrane.

[0033] Figure 4 It is a schematic diagram of the structure of the test device embodiment of the present invention when using fluctuating pressure to pressurize water.

[0034] Figure 5 It is a schematic diagram of the structure of the test device embodiment of the present invention when the excess water in the membrane channel is discharged.

[0035] Figure 6 It is a schematic diagram of the structure of the test device embodiment of the present invention during testing.

[0036] The present invention is further described below in conjunction with the accompanying drawings and embodiments. DETAILED DESCRIPTION

[0037] Example of fiber membrane integrity test method for plasma separator: See also Figure 1 and Figure 2 The present embodiment provides a method for testing the fiber membrane integrity of a plasma separator, comprising a plasma separator 1, wherein the plasma separator 1 is provided with an intra-membrane channel and an extra-membrane channel, wherein the intra-membrane channel and the extra-membrane channel are connected through a plurality of membrane pores.

[0038] The plasma separator 1 is provided with a first intra-membrane communication end 11, a second intra-membrane communication end 12 and an extra-membrane communication end 13. The first intra-membrane communication end 11 is connected to the first end of the intra-membrane channel, and the second intra-membrane communication end 12 is connected to the second end of the intra-membrane channel. There are generally two extra-membrane communication ends 13, the first extra-membrane communication end 13 is connected to the first end of the extra-membrane channel, and the second extra-membrane communication end is connected to the second end of the extra-membrane communication. In this embodiment, only the first extra-membrane communication end 13 is needed, and the second extra-membrane communication end is basically in a closed state. Therefore, all the "extra-membrane communication ends 13" mentioned below refer to the extra-membrane communication ends 13 connected to the first end of the extra-membrane channel, and the extra-membrane communication ends 13 are arranged close to the first intra-membrane communication end 11.

[0039] The fiber membrane integrity test method of the plasma separator includes the following steps: S01: Exhaust the gas in the plasma separator 1.

[0040] Combination Figure 1 and Figure 2 The step of discharging the gas in the plasma separator 1 comprises: The second membrane inner communication end 12 is connected to the water storage container 2, and the membrane outer communication end 13 is connected to the gas washing bottle 3 and the vacuum generator 4 in sequence.

[0041] When the first end of the extramembrane channel is open and the second end of the extramembrane channel is closed, the vacuum generator 4 is started to generate a pressure difference between the washing bottle 3 and the plasma separator 1; the pressure difference injects the water in the water storage container 2 into the intramembrane channel from the second intramembrane connecting end 12; the water in the intramembrane channel can be divided into two paths, the first path flows from the second end of the intramembrane channel to its first end, that is, to the first intramembrane connecting end 11, to squeeze and discharge the gas in the intramembrane channel, and the second path passes through the membrane pores of the fiber membrane to fill the extramembrane channel and flows to the first end of the extramembrane channel, that is, flows to the extramembrane connecting end 13, to squeeze and discharge the gas in the extramembrane channel.

[0042] This embodiment utilizes water to squeeze the gas. On the one hand, it can drive away the gas to fully discharge the gas in the plasma separator 1 and avoid residual bubbles in the fiber membrane, thereby affecting the subsequent water injection operation. On the other hand, water can play a role in preliminary membrane lubrication, which is beneficial to improving the membrane lubrication efficiency.

[0043] S02: Inject water across the membrane into the plasma separator 1.

[0044] Combination Figure 1 and Figure 3 The step of injecting water across the membrane into the plasma separator 1 comprises: When the first end of the intramembrane channel and the second end of the extramembrane channel are both closed, start the vacuum generator 4 to generate a pressure difference between the washing bottle 3 and the plasma separator 1; the pressure difference injects the water in the water storage container 2 into the intramembrane channel from the second intramembrane connecting end 12 and fills the entire intramembrane channel; in this process, the water in the intramembrane channel passes through the membrane pores of the fiber membrane and fills the extramembrane channel and fills the entire extramembrane channel, thereby realizing a vacuum membrane lubrication operation.

[0045] In order to ensure that water is injected into all membrane pores, the vacuum generator 4 needs to be kept open for a second preset time. The vacuum generator 4 can be closed only after water is discharged from the membrane outer channel and enters the washing bottle 3.

[0046] This embodiment uses vacuum trans-membrane water injection to improve the membrane lubrication effect and fill the membrane pores with water.

[0047] S03: Apply fluctuating pressure to the inner and outer channels of the membrane simultaneously.

[0048] Combination Figure 1 and Figure 4 The step of simultaneously applying fluctuating pressure to the inner channel and the outer channel of the membrane comprises: Fluctuating media is simultaneously supplied to the inner channel and the outer channel of the membrane through the fluctuating pressure source 5, so that the pressure in the inner channel of the membrane is equal to the pressure in the outer channel of the membrane at the same time. The fluctuating pressure source 5 refers to a device that can output fluctuating media to the outside, and the pressure of the fluctuating media can change periodically. The fluctuating pressure can be fluctuating air pressure or fluctuating water pressure. In this embodiment, fluctuating air pressure is preferably used, and the fluctuating media is fluctuating air pressure. The fluctuating pressure source 5 can adjust the output pressure of the air source through a proportional valve or a gate valve, and can realize fluctuating air pressure output in conjunction with a suitable control signal. This technology is a common pneumatic control method in this field and will not be described in detail here.

[0049] Furthermore, the first membrane inner connecting end 11 and the membrane outer connecting end 13 are both connected to the same fluctuating pressure source 5, and when the second end of the membrane inner channel and the second end of the membrane outer channel are both closed, the fluctuating pressure source 5 supplies fluctuating media to the first membrane inner connecting end 11 and the membrane outer connecting end 13.

[0050] The fluctuating pressure fluctuates within a first preset pressure range at a preset period, the first preset pressure range is preferably 50 kPa to 100 kPa, and the preset period is preferably 1.5 s. The fluctuating pressure may fluctuate in a wave shape, or in a sine wave shape or a cosine wave shape. The fluctuating medium may be air, nitrogen, oxygen, hydrogen, etc., preferably nitrogen.

[0051] This embodiment acts on both sides of the fiber membrane simultaneously through fluctuating pressure, that is, applying forces of equal magnitude and opposite directions at both ends of the membrane pore extension direction, which is conducive to pressing water into the membrane pores more efficiently, ensuring that the middle part of the membrane pore extension direction is also fully infiltrated, so that the water in the membrane pores can effectively block the membrane pores, which is conducive to improving the accuracy of subsequent tests.

[0052] Compared with stable pressure, fluctuating pressure can promote water flow, so as to push water deeper into the membrane pores faster and improve the efficiency and effect of water blocking the membrane pores. Fluctuating pressure can also break the bubbles attached to the fiber membrane faster, promote water molecules to quickly block the membrane pores, and avoid affecting the accuracy of subsequent test results.

[0053] S04: Drain the water in the channel inside the membrane.

[0054] Combination Figure 1 and Figure 5 The step of discharging water from the intra-membrane channel comprises: The second intra-membrane communicating end 12 is also connected to a wastewater collector 6 , and the first intra-membrane communicating end 11 is also connected to a pressure-stabilizing gas source 7 .

[0055] When both ends of the extra-membrane channel are closed, the pressure-stabilizing gas source 7 introduces gas of a second preset pressure into the intra-membrane channel through the first intra-membrane connecting end 11. The second preset pressure is preferably 50 kPa to 60 kPa, so as to discharge excess water in the intra-membrane channel from the second intra-membrane connecting end 12, and the discharged water is collected by the wastewater collector 6.

[0056] In this embodiment, the excess water in the membrane channel is discharged before the test in order to prevent the water remaining in the membrane channel from exerting external pressure on the membrane pores, thereby affecting the accuracy of subsequent tests.

[0057] S05: Use the pressure drop method to test the integrity of the fiber membrane in the plasma separator 1.

[0058] Combination Figure 1 and Figure 6 A pressure detector 8 is also connected between the membrane external connecting end 13 and the pressure-stabilizing gas source 7. The pressure detector 8 is used to detect the air pressure in the membrane external channel. The pressure detector 8 can be a pressure gauge, a pressure sensor, a pressure transmitter, a pressure meter, etc. In this embodiment, a pressure gauge is preferably used.

[0059] The steps of testing the integrity of the fiber membrane in the plasma separator 1 by the pressure drop method include: The second intra-membrane communication end 12 is connected to the wastewater collector 6 .

[0060] When the first end of the intra-membrane channel and the second end of the extra-membrane channel are both closed, the pressure-stabilizing gas source 7 introduces gas of a third preset pressure into the extra-membrane channel through the extra-membrane connecting end 13. The third preset pressure is less than the second preset pressure, and the third preset pressure is preferably 25 kPa to 30 kPa. When the gas pressure in the extra-membrane channel reaches the first preset threshold, the gas supply is stopped and maintained for the first preset time.

[0061] The current air pressure value is detected by the pressure detector 8.

[0062] The difference between the first preset threshold and the current air pressure value is compared.

[0063] It is determined whether the difference is less than or equal to the preset pressure difference. If so, the pressure drop is small, and the fiber membrane can be determined to be intact; if not, the pressure drop is large, and the fiber membrane can be determined to be damaged.

[0064] This embodiment can effectively detect the integrity of the fiber membrane in the plasma separator through the pressure drop method to ensure its integrity and functionality.

[0065] Example of a fiber membrane integrity test device for a plasma separator: Combination Figures 2 to 6 The fiber membrane integrity testing device of a plasma separator provided in this embodiment can be used to implement the fiber membrane integrity testing method of the above embodiment.

[0066] The fiber membrane integrity testing device of the plasma separator comprises a plasma separator 1, a fluctuating pressure source 5, a regulated pressure gas source 7, a gas washing bottle 3, a vacuum generator 4, a waste water collector 6 and a water storage container 2.

[0067] The plasma separator 1 is provided with an intramembrane channel and an extramembrane channel, and the intramembrane channel and the extramembrane channel are connected through a plurality of membrane pores.

[0068] The plasma separator 1 is provided with a first intra-membrane communication end 11, a second intra-membrane communication end 12 and an extra-membrane communication end 13. The first intra-membrane communication end 11 is connected to the first end of the intra-membrane channel, and the second intra-membrane communication end 12 is connected to the second end of the intra-membrane channel. There are generally two extra-membrane communication ends 13, the first extra-membrane communication end 13 is connected to the first end of the extra-membrane channel, and the second extra-membrane communication end is connected to the second end of the extra-membrane communication. In this embodiment, only the first extra-membrane communication end 13 is needed, and the second extra-membrane communication end is basically in a closed state. Therefore, all the "extra-membrane communication ends 13" mentioned below refer to the extra-membrane communication ends 13 connected to the first end of the extra-membrane channel, and the extra-membrane communication ends 13 are arranged close to the first intra-membrane communication end 11.

[0069] The upper part of the plasma separator 1 is connected with a first pipeline 10 and a second pipeline 20. The first pipeline 10 is connected to the first membrane inner connecting end 11 and the fluctuating pressure source 5 respectively, and the second pipeline 20 is connected to the membrane outer connecting end 13 and the fluctuating pressure source 5 respectively.

[0070] The pressure-stabilizing gas source 7 is connected to a third pipeline 30, which is connected to the first end of the intra-membrane channel through the first pipeline 10, and is connected to the first end of the extra-membrane channel through the second pipeline 20. A pressure detector 8 is connected to the third pipeline 30, and is used to detect the pressure values ​​of the third pipeline 30, the second pipeline 20 connected to the third pipeline 30, and the extra-membrane channel.

[0071] The washing bottle 3 is connected to a sixth pipeline 60 and a seventh pipeline 70 . The sixth pipeline 60 is connected to the membrane inner channel through the first pipeline 10 , and the sixth pipeline 60 is connected to the membrane outer channel through the second pipeline 20 . The washing bottle 3 is connected to the vacuum generator 4 through the seventh pipeline 70 .

[0072] The fluctuating pressure source 5 of this embodiment is connected to an eighth pipeline 80, which is respectively connected to the first pipeline 10 and the second pipeline 20, so that the fluctuating pressure source 5 can simultaneously supply fluctuating media to the intra-membrane channel and the extra-membrane channel.

[0073] The second intra-membrane connecting end 12 of the plasma separator 1 is also connected to a fourth pipeline 40 and a fifth pipeline 50; the wastewater collector 6 is connected to the second end of the intra-membrane channel through the fourth pipeline 40, that is, the wastewater collector 6 is connected to the second intra-membrane connecting end 12 through the fourth pipeline 40; the water storage container 2 is connected to the second end of the intra-membrane channel through the fifth pipeline 50, that is, the water storage container 2 is connected to the second intra-membrane connecting end 12 through the fifth pipeline 50.

[0074] In this embodiment, valves are connected to the first pipeline 10, the second pipeline 20, the third pipeline 30, the fourth pipeline 40, the fifth pipeline 50, the sixth pipeline 60 and the eighth pipeline 80. Specifically, the first pipeline 10 is connected to the first valve 101, the second pipeline 20 is connected to the second valve 201, the third pipeline 30 is connected to the third valve 301, the fourth pipeline 40 is connected to the fourth valve 401, the fifth pipeline 50 is connected to the fifth valve 501, the sixth pipeline 60 is connected to the sixth valve 601, and the eighth pipeline 80 is connected to the seventh valve 801.

[0075] Combination Figure 1 and Figure 2In step S01, the fifth valve 501, the first valve 101, the second valve 201 and the sixth valve 601 are opened, and the other valves remain closed. At this time, the vacuum generator 4 is started to generate a pressure difference between the gas washing bottle 3 and the plasma separator 1. The pressure difference causes the water in the water storage container 2 to enter the membrane channel of the plasma separator 1 through the second membrane inner connecting end 12. At this time, the water can be divided into two paths, the first path flows to the first end of the membrane channel and is discharged from the first membrane inner connecting end 11, and the second path enters the membrane outer channel through the membrane pores and is discharged from the membrane outer connecting end 13; in this process, the water can squeeze and discharge the gas in the membrane channel and the membrane outer channel.

[0076] Combination Figure 1 and Figure 3 In step S02, the fifth valve 501, the second valve 201 and the sixth valve 601 are opened, and the other valves remain closed. At this time, the vacuum generator 4 is started to create a product pressure difference between the gas washing bottle 3 and the plasma separator 1. The pressure difference causes the water in the water storage container 2 to first enter the membrane channel of the plasma separator 1 through the second membrane inner connecting end 12; the water passes through the membrane pores and enters the membrane outer channel, realizing trans-membrane water injection.

[0077] Combination Figure 1 and Figure 4 In step S03, the first valve 101, the second valve 201 and the seventh valve 801 are opened, and the other valves remain closed. At this time, the fluctuating pressure source 5 is started, and the fluctuating medium is supplied to the inner and outer channels of the membrane for a certain period of time to ensure that all membrane pores are filled with water, and the membrane pores are blocked by the tension of the water to achieve full membrane lubrication.

[0078] Combination Figure 1 and Figure 5 In step S04, the fourth valve 401, the first valve 101 and the third valve 301 are opened, and the other valves remain closed. At this time, the pressure-stabilizing gas source 7 is started, and the gas is used to discharge the excess water in the membrane channel. The excess water is discharged into the wastewater collector 6 to prepare for the subsequent pressure drop method test.

[0079] Combination Figure 1 and Figure 6 In step S05, the fourth valve 401, the second valve 201 and the third valve 301 are opened, and the other valves remain closed. At this time, the pressure-stabilizing gas source 7 is started, and the integrity of the fiber membrane in the plasma separator 1 is detected by the pressure drop method.

[0080] In summary, the present invention discharges the gas in the plasma separator 1 before the test, and performs transmembrane water injection, so that the membrane pores of the fiber membrane in the plasma separator 1 are filled with water, and then fluctuating pressure is applied to the membrane channel and the membrane channel at the same time. The fluctuating pressure can better promote the flow of water, so as to quickly press the water into all membrane pores, and conveniently use the surface tension of water to block the membrane pores of the fiber membrane, which not only achieves the effect of fully moistening the membrane, but also saves time and cost, and improves the test efficiency; by discharging excess water in the membrane channel before the test, it is avoided that the excess water affects the normal progress of subsequent tests, and the accuracy of subsequent pressure drop method tests is ensured. The present invention can more accurately control the flow of water inside the plasma separator 1, and avoid the fiber membrane from being damaged due to excessive or insufficient water flow.

[0081] Finally, it should be emphasized that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various changes and modifications. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A method for testing the integrity of a fiber membrane of a plasma separator, comprising a plasma separator, wherein an inner membrane channel and an outer membrane channel are provided in the plasma separator, wherein the inner membrane channel and the outer membrane channel are connected through membrane pores, and wherein: The fiber membrane integrity testing method of the plasma separator comprises the following steps: Exhausting the gas in the plasma separator; Injecting water across the membrane into the plasma separator to lubricate the fiber membrane; Applying fluctuating pressure to the membrane inner channel and the membrane outer channel simultaneously to press water into the membrane pores; Discharging water in the channel within the membrane; The integrity of the fiber membrane in the plasma separator was tested using the pressure drop method.

2. The method for testing the fiber membrane integrity of a plasma separator according to claim 1, characterized in that: The step of simultaneously applying fluctuating pressure to the intra-membrane channel and the extra-membrane channel comprises: Fluctuating media is simultaneously supplied to the intra-membrane channel and the extra-membrane channel through a fluctuating pressure source, so that the pressure of the intra-membrane channel is equal to the pressure of the extra-membrane channel at the same time.

3. The method for testing the integrity of the fiber membrane of a plasma separator according to claim 2, characterized in that: The fluctuating pressure fluctuates within a first preset pressure range at a preset period, and the fluctuating pressure is fluctuating air pressure or fluctuating water pressure.

4. The method for testing the fiber membrane integrity of a plasma separator according to claim 3, characterized in that: The plasma separator is provided with a first intra-membrane communication end and an extra-membrane communication end, wherein the first intra-membrane communication end is communicated with the first end of the intra-membrane channel, and the extra-membrane communication end is communicated with the first end of the extra-membrane channel; The first membrane inner connecting end and the membrane outer connecting end are both connected to the same fluctuating pressure source, and when the second end of the membrane inner channel and the second end of the membrane outer channel are both closed, the fluctuating pressure source supplies the fluctuating medium to the first membrane inner connecting end and the membrane outer connecting end.

5. The method for testing the integrity of the fiber membrane of a plasma separator according to claim 4, characterized in that: The plasma separator is also provided with a second intra-membrane communicating end, the second intra-membrane communicating end is communicated with the second end of the intra-membrane channel, the second intra-membrane communicating end is connected to a wastewater collector, and the first intra-membrane communicating end is also connected to a pressure-stabilizing gas source; The step of discharging water from the intra-membrane channel comprises: When both ends of the extramembrane channel are closed, gas is introduced into the first intramembrane connecting end through the stabilized pressure gas source to discharge water in the intramembrane channel from the second intramembrane connecting end to the wastewater collector.

6. The method for testing the fiber membrane integrity of a plasma separator according to claim 5, characterized in that: The second membrane inner communicating end is also connected to a water storage container, and the membrane outer communicating end is sequentially connected to a gas washing bottle and a vacuum generator; The step of injecting water across the membrane into the plasma separator comprises: When the first end of the intra-membrane channel and the second end of the extra-membrane channel are both closed, the vacuum generator is started to generate a pressure difference between the washing bottle and the plasma separator. The pressure difference injects the water in the water storage container into the intra-membrane channel from the second intra-membrane connecting end, and then the water passes through the membrane pores of the fiber membrane and fills the extra-membrane channel.

7. The method for testing the integrity of the fiber membrane of a plasma separator according to claim 5, characterized in that: The outer communicating end of the membrane is also connected to a pressure detector; The steps of testing the integrity of the fiber membrane in the plasma separator by the pressure drop method include: connecting the second membrane inner communication end with the wastewater collector; When the first end of the intra-membrane channel and the second end of the extra-membrane channel are both closed, gas is supplied to the extra-membrane channel through the stabilized pressure gas source, and when the gas pressure reaches a first preset threshold, the gas supply is stopped and maintained for a first preset time; Detecting the current air pressure value by the pressure detector; Comparing the difference between the first preset threshold and the current air pressure value; It is determined whether the difference is less than or equal to a preset pressure difference. If so, it is determined that the fiber membrane is intact.

8. The method for testing the integrity of the fiber membrane of a plasma separator according to claim 6, characterized in that: The step of discharging gas from the plasma separator comprises: connecting the second membrane inner communication end with the water storage container; When the second end of the extramembrane channel is closed, the vacuum generator is started to generate a pressure difference between the washing bottle and the plasma separator, and the pressure difference injects the water in the water storage container into the intramembrane channel from the second intramembrane connecting end. Then the water can be divided into two paths. The first path flows from the second end of the intramembrane channel to the first end thereof and discharges the gas in the intramembrane channel, and the second path passes through the membrane pores of the fiber membrane to fill the extramembrane channel and flows to the first end of the extramembrane channel to discharge the gas in the extramembrane channel.

9. A fiber membrane integrity testing device for a plasma separator, comprising a plasma separator, wherein an inner membrane channel and an outer membrane channel are provided in the plasma separator, wherein the inner membrane channel and the outer membrane channel are connected through membrane pores, and wherein: It also includes a fluctuating pressure source. The plasma separator is connected to a first pipeline and a second pipeline. The first pipeline is connected to the intra-membrane channel and the fluctuating pressure source respectively, and the second pipeline is connected to the extra-membrane channel and the fluctuating pressure source respectively.

10. The fiber membrane integrity testing device for a plasma separator according to claim 9, characterized in that: It also includes a pressure-stabilizing gas source and a wastewater collector. The pressure-stabilizing gas source is connected to a third pipeline, and the third pipeline is connected to the membrane channel. The wastewater collector is connected to a fourth pipeline, and the fourth pipeline is connected to the membrane channel.

11. The fiber membrane integrity testing device for a plasma separator according to claim 9, characterized in that: It also includes a water storage container, a washing bottle and a vacuum generator. The water storage container is connected to a fifth pipeline, and the fifth pipeline is connected to the membrane inner channel. The washing bottle is connected to a sixth pipeline and a seventh pipeline, and the sixth pipeline is connected to the membrane outer channel, and the seventh pipeline is connected to the vacuum generator.

12. The fiber membrane integrity testing device for a plasma separator according to claim 9, characterized in that: It also includes a pressure-stabilizing gas source, a pressure detector and a wastewater collector. The pressure-stabilizing gas source is connected to a third pipeline, the pressure detector is connected to the third pipeline, the third pipeline is connected to the extramembrane channel, the wastewater collector is connected to a fourth pipeline, and the fourth pipeline is connected to the intramembrane channel.

13. The fiber membrane integrity testing device for a plasma separator according to claim 9, characterized in that: It also includes a water storage container, a gas washing bottle and a vacuum generator. The water storage container is connected to a fifth pipeline, and the fifth pipeline is connected to the inner channel of the membrane. The gas washing bottle is connected to a sixth pipeline and a seventh pipeline, and the sixth pipeline is respectively connected to the inner channel of the membrane and the outer channel of the membrane, and the seventh pipeline is connected to the vacuum generator.

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