A separation device employing a hollow fiber membrane

Abstract

A separation device employing a hollow fiber membrane includes a shell, fiber bundles, a blower, and end caps. The shell contains at least two sets of U-shaped fiber bundles, with the outer fiber bundles enclosing the inner fiber bundles. The blower is mounted on the shell and connected to an air inlet at the top. The number of fiber filaments in the fiber bundles decreases progressively from the outer side of the shell towards the central axis. This, combined with the cast-solidified ends of the fiber bundles forming isolated gas channels, and the addition of a top blower actively drives the flow of the raw material gas, optimizing the gas flow direction within the cavity and dispersing the gas enriched on the membrane fiber surface. Therefore, when extracting the enriched gas, the surface with more fiber filaments has a greater amount of enriched gas. Furthermore, due to its proximity to the blower, the blower's force is maximized to disperse the gas enriched on the fiber filament surface. This maximizes the blower's effectiveness and reduces concentration polarization.

Description

Technical Field

[0001] This invention relates to the field of hollow fiber membrane separation technology, specifically to a separation device using a hollow fiber membrane. Background Technology

[0002] Patent application number CN201621146721.4 discloses a hollow fiber gas separation membrane module, including a shell, a membrane core, and a flow splitting assembly; the shell consists of a cylindrical body and end caps; the membrane core consists of a central tube and a membrane fiber bundle; the central tube intersects with the two end caps and opens on the surface of one of the end caps; the flow splitting assembly includes an inner hub that matches the outer diameter of the central tube and is fitted onto the central tube, with n partitions axially arranged between the outer wall of the inner hub and the inner wall of the end cap, dividing the cavity between them into n sectors, and the corresponding sectors L and R in the two end caps are connected through the inner cavity of the membrane fiber bundle Si to form the i-th flow channel of the membrane module, with a through hole provided on one end of the flow channel to connect adjacent flow channels end to end in series to form a foldback flow channel.

[0003] The purging methods in the above-mentioned prior art are not targeted, and the uniform density of the membrane fibers leads to uneven overall separation performance and makes it difficult to reduce concentration polarization. Summary of the Invention

[0004] The purpose of this invention is to provide a separation device using a hollow fiber membrane to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A separation device employing a hollow fiber membrane includes a housing, a fiber bundle, a fan, and end caps, wherein: The outer casing contains at least two sets of U-shaped fiber bundles, with the outer fiber bundles wrapping around the inner fiber bundles. The fan is mounted on the outer casing and communicates with the air inlet at the top of the outer casing.

[0006] Preferably, the fiber bundle is composed of fiber monofilaments, wherein the number of fiber monofilaments in the inner fiber bundle of two adjacent fiber bundles is less than the number of fiber monofilaments in the outer fiber bundle.

[0007] Preferably, the lower end of the outer casing is provided with an end cap, and the end cap is provided with an air extraction pipe.

[0008] Preferably, the outer side of the outer shell is provided with an array of ventilation holes.

[0009] Compared with the prior art, the beneficial effects of the present invention are: This invention discloses a separation device using a hollow fiber membrane. The number of single fiber filaments in the fiber bundle decreases progressively from the outer inner side of the outer shell towards the central axis. This, combined with the casting and solidification of the fiber bundle ends to form isolated gas channels, and the addition of a top-mounted fan to actively drive and guide the raw material gas, optimizes the gas flow direction within the cavity and disperses the gas enriched on the surface of the membrane filaments. Therefore, when extracting the enriched gas, the surface with more single fiber filaments has a greater amount of enriched gas. Simultaneously, due to its proximity to the fan, the fan force is maximized to disperse the gas enriched on the surface of the single fiber filaments. This maximizes the effectiveness of the fan and reduces concentration polarization. Attached Figure Description

[0010] Figure 1 This is a three-dimensional schematic diagram of the overall structure of the present invention; Figure 2 This is a three-dimensional internal schematic diagram of the present invention; Figure 3 This is a three-dimensional schematic diagram of the fiber bundle in this invention.

[0011] In the diagram: 1. Outer shell, 2. Fiber bundle, 3. Fan, 4. End cap, 11. Vent hole. Detailed Implementation

[0012] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0013] Example: Please see Figures 1 to 3 The present invention provides a technical solution: A separation device employing a hollow fiber membrane includes a housing 1, a fiber bundle 2, a fan 3, and an end cap 4, wherein: The outer shell 1 has at least two sets of U-shaped fiber bundles 2 inside. The lower end of the outer shell 1 is a sealing and casting end, which is used to seal and cast both ends of the fiber bundles 2. The outer fiber bundles 2 wrap around the inner fiber bundles 2. The fan 3 is installed on the outer shell 1 and is connected to the air inlet at the upper end of the outer shell 1.

[0014] In a preferred embodiment, the fiber bundle 2 is composed of fiber monofilaments, wherein the number of fiber monofilaments in the inner fiber bundle 2 of two adjacent fiber bundles 2 is less than the number of fiber monofilaments in the outer fiber bundle 2.

[0015] Since the number of fiber filaments in fiber bundle 2 decreases gradually from the inner outer side of shell 1 to the central axis and is arranged in an arc-shaped U-shape, and each fiber bundle 2 is cast separately at both ends, each fiber bundle 2 forms an isolated gas passage at the end. At the same time, the top fan 3 actively drives the flow of raw material gas, optimizes the gas flow direction in the cavity, disperses the gas enriched on the surface of the membrane filaments, and reduces the influence of concentration polarization. Since fan 3 first blows onto the outer fiber bundle 2 with a larger number of monofilaments, and then blows onto the inner fiber bundle 2 with a smaller number of monofilaments, the airflow from fan 3 decreases as the number of monofilaments decreases. Therefore, when extracting enriched gas, the surface with a larger number of monofilaments accumulates more gas, and because it is close to the fan, the airflow is most effective in dispersing the gas accumulated on the surface of the monofilaments. This maximizes the fan's effectiveness and reduces concentration polarization.

[0016] In a preferred embodiment, the lower end of the outer casing 1 is provided with an end cap 4, and the end cap 4 is provided with a suction pipe 41. The suction pipe 41 is used to extract and discharge the enriched gas.

[0017] In a preferred embodiment, the outer side of the outer casing 1 is provided with an array of vent holes 11.

[0018] Working principle of the invention: Start the blower 3, which pumps raw material gas into the outer casing 1. Start the vacuum pump connected to the exhaust pipe 41. The oxygen-enriched gas passes through the fiber bundle 2 and enters the interior of the fiber bundle 2. It then flows from the end of the fiber bundle 2 into the exhaust pipe 41 and is subsequently pumped out by the vacuum pump.

[0019] Since fan 3 first blows onto the outer fiber bundle 2 with a larger number of monofilaments, and then blows onto the inner fiber bundle 2 with a smaller number of monofilaments, the airflow from fan 3 decreases as the number of monofilaments decreases. Therefore, when extracting enriched gas, the surface with a larger number of monofilaments accumulates more gas, and because it is close to the fan, the airflow is most effective in dispersing the gas accumulated on the surface of the monofilaments. This maximizes the fan's effectiveness and reduces concentration polarization.

[0020] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A separation device employing a hollow fiber membrane, comprising a shell (1), a fiber bundle (2), a fan (3), and an end cap (4), characterized in that: The outer shell (1) is provided with at least two sets of U-shaped fiber bundles (2), the outer fiber bundle (2) wraps the inner fiber bundle (2), and the fan (3) is provided on the outer shell (1) and connected to the air inlet at the upper end of the outer shell (1).

2. The separation device using a hollow fiber membrane according to claim 1, characterized in that: The fiber bundle (2) is composed of fiber monofilaments, wherein the number of fiber monofilaments in the inner fiber bundle (2) of two adjacent fiber bundles (2) is less than the number of fiber monofilaments in the outer fiber bundle (2).

3. The separation device using a hollow fiber membrane according to claim 1, characterized in that: The lower end of the outer shell (1) is provided with an end cap (4), and an air extraction pipe (41) is provided on the end cap (4).

4. A separation device using a hollow fiber membrane according to claim 3, characterized in that: The outer shell (1) is provided with an array of ventilation holes (11) on its outer side.

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