Drying device of hollow fiber membrane blood purifier

Abstract

The utility model discloses a hollow fiber membrane blood purifier drying device which comprises a clean hot air generator, and the output end of the clean hot air generator is connected with a first conveying pipeline and a second conveying pipeline. The first conveying pipeline and the second conveying pipeline are used for being connected with a blood inlet and a liquid inlet in the hollow fiber membrane blood purifier body respectively, and a flow speed adjusting device is arranged on the first conveying pipeline and / or the second conveying pipeline. The drying effect can be greatly improved, and meanwhile the fiber membrane is kept constant in shape and not prone to deformation.

Description

Technical Field

[0001] The present application relates to the field of medical device processing technology, and in particular to a drying device for a hollow fiber membrane blood purifier. Background Art

[0002] Hollow fiber membrane blood purifiers, including hemodialyzers, hemofilters, hemodiafiltration filters, CRRT filters, plasma separators, and plasma component separators, are key medical devices in the blood purification field. After fabrication, hollow fiber membrane blood purifiers undergo performance testing and are only released for medical use after passing these tests. One such test involves water testing of hollow fiber membrane blood purifiers. Products that pass these tests are then dried.

[0003] In the prior art, the drying of the hollow fiber membrane blood purifier is carried out by passing heated clean air into the two air inlets of the hollow fiber membrane blood purifier, namely the blood input port and the liquid input port, and then exhausting the hot air from the blood outlet and the liquid outlet for drying. Since most of the hot air entering the hollow fiber membrane blood purifier through the blood port is discharged through the blood port, and most of this hot air passes through the cavity of the hollow fibers in the hollow fiber membrane blood purifier, and most of the moisture in the hollow fiber membrane blood purifier exists between the hollow fibers in the hollow fiber membrane blood purifier, the moisture carried away by this hot air is relatively small, resulting in incomplete drying; and poor control of the drying flow rate and pressure can easily lead to damage to the fiber membrane, and excessively high temperatures can easily cause the pores in the hollow fiber membrane wall to deform or become smaller, thereby reducing the performance of the product. For this reason, the present invention proposes a drying device for a hollow fiber membrane blood purifier. Utility Model Content

[0004] The embodiment of the present application provides a drying device for a hollow fiber membrane blood purifier, which can greatly improve the drying effect while maintaining the shape of the fiber membrane constant and not easily deformed.

[0005] In view of this, the present application provides a drying device for a hollow fiber membrane blood purifier, comprising: a clean hot air generator;

[0006] The output end of the clean hot air generator is connected to a first delivery pipeline and a second delivery pipeline;

[0007] The first delivery pipe and the second delivery pipe are respectively used to connect to the blood inlet and the liquid inlet on the hollow fiber membrane blood purifier body;

[0008] The first delivery pipeline and / or the second delivery pipeline is provided with a flow rate regulating device.

[0009] Optionally, the output end of the clean hot air generator is connected to the first delivery pipeline and the second delivery pipeline respectively through a delivery main pipe;

[0010] The delivery main pipe is provided with a first pressure detection device.

[0011] Optionally, the first delivery pipeline and the second delivery pipeline are respectively provided with a first flow velocity detection device and a second flow velocity detection device;

[0012] When the flow rate regulating device is provided on the first delivery pipeline, the first flow rate detecting device is located between the flow rate regulating device and the blood inlet on the hollow fiber membrane blood purifier body;

[0013] When the flow rate regulating device is provided on the second delivery pipeline, the second flow rate detecting device is located between the flow rate regulating device and the liquid inlet on the hollow fiber membrane blood purifier body.

[0014] Optionally, a first temperature detection device is provided on the first conveying pipeline.

[0015] Optionally, it is characterized by further comprising: a water-gas separation device;

[0016] The input end of the water-gas separation device is connected to a third delivery pipeline and a fourth delivery pipeline;

[0017] The third delivery pipe and the fourth delivery pipe are respectively used to be connected to the blood outlet and the liquid outlet on the hollow fiber membrane blood purifier body.

[0018] Optionally, a second temperature detection device is provided on the third conveying pipeline.

[0019] Optionally, a regulating valve is provided on the fourth delivery pipeline.

[0020] Optionally, a second pressure detection device is further provided on the fourth delivery pipeline;

[0021] The second pressure detection device is located between the regulating valve and the liquid outlet on the hollow fiber membrane blood purifier body.

[0022] Optionally, the output end of the water-gas separation device is connected to a waste gas collector.

[0023] Optionally, the first conveying pipeline, the second conveying pipeline, the third conveying pipeline and the fourth conveying pipeline are all provided with switch valves.

[0024] It can be seen from the above technical scheme that the embodiment of the present application has the following advantages: the drying device of the hollow fiber membrane blood purifier includes a clean hot air generator, and the output end of the clean hot air generator is connected to a first conveying pipe and a second conveying pipe, wherein the first conveying pipe and the second conveying pipe are respectively used to connect with the blood inlet and the liquid inlet on the hollow fiber membrane blood purifier body. By arranging a flow rate regulating device on the first conveying pipe and / or the second conveying pipe, the flow rate regulating device can be used to adjust the air flow rate so that the air flow rate in the liquid inlet is slightly lower than the air flow rate in the blood inlet, and then the hot air filled in the hollow fiber membrane blood purifier body has a pressure inside the fiber membrane slightly higher than the pressure outside the membrane, so that the hot air can more easily pass through the fiber membrane gap and flow out from the liquid outlet, thereby quickly taking away the moisture in the fiber membrane, greatly improving the drying effect. At the same time, the pore flow rate through the fiber membrane gap in the hollow fiber membrane blood purifier body can be controlled within a lower range by the flow rate regulating device to avoid damage to the fiber membrane due to excessive flow rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic structural diagram of a drying device for a hollow fiber membrane blood purifier in an embodiment of the present application;

[0026] Wherein, the accompanying drawings are marked as follows:

[0027] 1-clean hot air generator, 2-hollow fiber membrane blood purifier body, 3-water-gas separation device, 4-waste gas collector, 5-delivery main pipe, 6-first delivery pipeline, 7-second delivery pipeline, 8-third delivery pipeline, 9-fourth delivery pipeline, 10-flow rate regulating device, 11-first pressure detection device, 12-first flow rate detection device, 13-second flow rate detection device, 14-first temperature detection device, 15-regulating valve, 16-second pressure detection device, 17-second temperature detection device, 18-blood inlet, 19-liquid inlet, 20-blood outlet, 21-liquid outlet. DETAILED DESCRIPTION

[0028] In order to help those skilled in the art better understand the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of this application.

[0029] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this application and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0030] Unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be interpreted broadly. For example, they can refer to fixed, removable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this application.

[0031] This application provides an embodiment of a drying device for a hollow fiber membrane blood purifier. Figure 1 .

[0032] The drying device of the hollow fiber membrane blood purifier in this embodiment includes: a clean hot air generator 1, the output end of the clean hot air generator 1 is connected to a first delivery pipe 6 and a second delivery pipe 7, the first delivery pipe 6 and the second delivery pipe 7 are respectively used to connect to the blood inlet 18 and the liquid inlet 19 on the hollow fiber membrane blood purifier body 2, and a flow rate regulating device 10 is provided on the first delivery pipe 6 and / or the second delivery pipe 7.

[0033] It should be noted that: by arranging a flow rate regulating device 10 on the first conveying pipe 6 and / or the second conveying pipe 7, the flow rate regulating device 10 can be used to adjust the air flow rate so that the air flow rate in the liquid inlet 19 is slightly lower than the air flow rate in the blood inlet 18, thereby making the hot air filled in the hollow fiber membrane blood purifier body 2 have a pressure inside the fiber membrane slightly higher than the pressure outside the membrane, making it easier for the hot air to pass through the fiber membrane gap and flow out from the liquid outlet 21, thereby quickly taking away the moisture in the fiber membrane and greatly improving the drying effect. At the same time, the flow rate regulating device 10 can control the pore flow rate through the fiber membrane gap in the hollow fiber membrane blood purifier body 2 within a lower range to avoid damage to the fiber membrane due to excessive flow rate.

[0034] The above is the first embodiment of a drying device for a hollow fiber membrane blood purifier provided by the embodiment of the present application. The following is the second embodiment of a drying device for a hollow fiber membrane blood purifier provided by the embodiment of the present application. For details, please refer to Figure 1 .

[0035] The drying device of the hollow fiber membrane blood purifier in this embodiment includes: a clean hot air generator 1, the output end of the clean hot air generator 1 is connected to a first delivery pipe 6 and a second delivery pipe 7, the first delivery pipe 6 and the second delivery pipe 7 are respectively used to connect to the blood inlet 18 and the liquid inlet 19 on the hollow fiber membrane blood purifier body 2, and the first delivery pipe 6 and / or the second delivery pipe 7 are provided with a flow rate regulating device 10. In this embodiment, the flow rate regulating device 10 is provided on the second delivery pipe 7.

[0036] It can be understood that the device controls the air flow rate at different inlets to allow clean hot air to pass smoothly through the middle of the hollow fibers, taking away a large amount of moisture, while maintaining the constant shape of the fiber membrane and preventing it from deforming.

[0037] The output end of the clean hot air generator 1 is connected to the first delivery pipe 6 and the second delivery pipe 7 through a delivery main pipe 5. The delivery main pipe 5 is provided with a first pressure detection device 11. Specifically, one end of the delivery main pipe 5 is connected to the output end of the clean hot air generator 1, and the other end is connected to one end of the first delivery pipe 6 and one end of the second delivery pipe 7 respectively; the other ends of the first delivery pipe 6 and the other ends of the second delivery pipe 7 are respectively connected to the blood inlet 18 and the liquid inlet 19 on the hollow fiber membrane blood purifier body 2.

[0038] A first flow rate detecting device 12 and a second flow rate detecting device 13 are respectively provided on the first conveying pipeline 6 and the second conveying pipeline 7; when a flow rate regulating device 10 is provided on the first conveying pipeline 6, the first flow rate detecting device 12 is located between the flow rate regulating device 10 and the blood inlet 18 on the hollow fiber membrane blood purifier body 2; when a flow rate regulating device 10 is provided on the second conveying pipeline 7, the second flow rate detecting device 13 is located between the flow rate regulating device 10 and the liquid inlet 19 on the hollow fiber membrane blood purifier body 2.

[0039] A first temperature detection device 14 is also provided on the first conveying pipeline 6 .

[0040] It also includes: a water-gas separation device 3, the input end of the water-gas separation device 3 is connected to a third delivery pipe 8 and a fourth delivery pipe 9, and the third delivery pipe 8 and the fourth delivery pipe 9 are respectively used to connect to the blood outlet 20 and the liquid outlet 21 on the hollow fiber membrane blood purifier body 2.

[0041] It should be noted that: since the exhaust gas during the entire drying process is a water-gas mixture, the water-gas separation device 3 is provided to separate the water-gas before the gas is discharged into the atmosphere, wherein the gas is discharged into the air and the liquid is discharged into the wastewater pipeline.

[0042] A second temperature detection device 17 is provided on the third conveying pipeline 8 .

[0043] It should be noted that: by arranging a second temperature detection device 17 on the third conveying pipe 8, the second temperature detection device 17 is used to test the final temperature of the hot air passing through the fiber membrane to determine the drying end point (the final temperature of the hot air is used for judgment based on the temperature of the water vapor mixture generally not exceeding 100°C. If it is not completely dried, the temperature of the outlet will not exceed 100°C. If the temperature begins to rise significantly or exceeds 100°C, it means that the exhaust gas does not contain water vapor, that is, the drying is complete). Compared with the previous judgment method of relying on experience to determine the end point of the drying time, the judgment is more accurate and the drying is more thorough, which can effectively improve the product use effect of the hollow fiber membrane blood purifier.

[0044] A regulating valve 15 is provided on the fourth conveying pipeline 9, which is used to control the opening and closing of the fourth conveying pipeline 9. The opening and closing and pressure control of the fourth conveying pipeline 9 can be controlled by the regulating valve 15 to achieve rapid removal of moisture in the fiber membrane at the end of drying and improve drying efficiency.

[0045] A second pressure detection device 16 is also provided on the fourth delivery pipeline 9 . The second pressure detection device 16 is located between the regulating valve 15 and the liquid outlet 21 on the hollow fiber membrane blood purifier body 2 .

[0046] The output end of the water-gas separation device 3 is connected to the exhaust gas collector 4 .

[0047] The first delivery pipeline 6 , the second delivery pipeline 7 , the third delivery pipeline 8 and the fourth delivery pipeline 9 are all provided with switch valves.

[0048] The present application also provides a drying method based on the above-mentioned hollow fiber membrane blood purifier drying device, which specifically comprises the following steps:

[0049] 1. Wet membrane squeezing: clean compressed air enters from the blood inlet 18 on the hollow fiber membrane blood purifier body 2, open the switch valves on the first delivery pipe 6, the second delivery pipe 7, the third delivery pipe 8 and the fourth delivery pipe 9, and set the compressed air pressure to 0-1 bar (preferably 0.4-0.7 bar). The ventilation time is within 1 minute (preferably 10-20 seconds) to complete the squeezing;

[0050] 2. Start drying by opening the on-off valves on the first, second, third, and fourth delivery pipes 6, 7, 8, and 9. Heat the clean compressed air to 80-105°C (preferably 90-105°C) and allow it to enter the blood inlet 18 of the hollow fiber membrane blood purifier body 2 from the first delivery pipe 6 at a flow rate of 4-8 cubic meters per hour (preferably 4-6 cubic meters per hour). Simultaneously, allow the clean compressed air to enter the liquid inlet 19 of the hollow fiber membrane blood purifier body 2 from the second delivery pipe 7. The compressed air flow rate is set to 3-6 cubic meters per hour (preferably 3-5 cubic meters per hour) through the flow rate regulating device 10. Dry for 1-8 minutes (preferably 1-4 minutes).

[0051] 3. Close the fourth delivery pipeline 9 by controlling the regulating valve 15, adjust the pressure of the second pressure detection device 16 to 0.5-1.2 bar (preferably 0.8-1.1 bar), and continue to charge clean compressed air for 1-4 minutes;

[0052] 4. The temperature of the air in the third conveying pipe 8 is monitored in real time by the second temperature detection device 17. When the temperature is 95-105°C (preferably 100-105°C), the drying is completed.

[0053] As described above, the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A drying device for a hollow fiber membrane blood purifier, characterized in that: include: Clean hot air generator; The output end of the clean hot air generator is connected to a first delivery pipeline and a second delivery pipeline; The first delivery pipe and the second delivery pipe are respectively used to connect to the blood inlet and the liquid inlet on the hollow fiber membrane blood purifier body; The first delivery pipeline and / or the second delivery pipeline is provided with a flow rate regulating device.

2. The drying device for the hollow fiber membrane blood purifier according to claim 1, characterized in that: The output end of the clean hot air generator is connected to the first delivery pipeline and the second delivery pipeline respectively through a delivery main pipe; The delivery main pipe is provided with a first pressure detection device.

3. The drying device for the hollow fiber membrane blood purifier according to claim 1, characterized in that: The first conveying pipeline and the second conveying pipeline are respectively provided with a first flow velocity detection device and a second flow velocity detection device; When the flow rate regulating device is provided on the first delivery pipeline, the first flow rate detecting device is located between the flow rate regulating device and the blood inlet on the hollow fiber membrane blood purifier body; When the flow rate regulating device is provided on the second delivery pipeline, the second flow rate detecting device is located between the flow rate regulating device and the liquid inlet on the hollow fiber membrane blood purifier body.

4. The drying device for the hollow fiber membrane blood purifier according to claim 1, characterized in that: The first conveying pipeline is provided with a first temperature detection device.

5. The drying device for the hollow fiber membrane blood purifier according to any one of claims 1 to 4, characterized in that: Also includes: Water-gas separation device; The input end of the water-gas separation device is connected to a third delivery pipeline and a fourth delivery pipeline; The third delivery pipe and the fourth delivery pipe are respectively used to be connected to the blood outlet and the liquid outlet on the hollow fiber membrane blood purifier body.

6. The drying device for the hollow fiber membrane blood purifier according to claim 5, characterized in that: The third conveying pipeline is provided with a second temperature detection device.

7. The drying device for the hollow fiber membrane blood purifier according to claim 5, characterized in that: The fourth delivery pipeline is provided with a regulating valve.

8. The drying device for the hollow fiber membrane blood purifier according to claim 7, characterized in that: The fourth delivery pipeline is also provided with a second pressure detection device; The second pressure detection device is located between the regulating valve and the liquid outlet on the hollow fiber membrane blood purifier body.

9. The drying device for the hollow fiber membrane blood purifier according to claim 5, characterized in that: The output end of the water-gas separation device is connected to a waste gas collector.

10. The drying device for the hollow fiber membrane blood purifier according to claim 5, characterized in that: The first conveying pipeline, the second conveying pipeline, the third conveying pipeline and the fourth conveying pipeline are all provided with switch valves.

Images