A high efficiency hollow fiber membrane contactor

Abstract

The application discloses a kind of efficient hollow fiber membrane contactors, comprising: center distribution pipe, the center distribution pipe is hollow long tube, the center distribution pipe both ends are cast in epoxy resin, one end is epoxy resin package, one end is sealed by epoxy resin, the center distribution pipe is equipped with water guide groove and water distribution hole;Hollow fiber membrane, the hollow fiber membrane is hollow fiber hydrophobic membrane, the hollow fiber membrane is arranged in parallel with the axial direction of the center distribution pipe;Membrane, the membrane is non-porous membrane, the membrane is evenly wrapped around a certain number of hollow fiber membranes around the center distribution pipe.This device is composed of center distribution pipe, hollow fiber membrane, membrane, membrane shell, without baffle, thereby reducing the space inside membrane contactor, further reduce cost, the structure of current existing membrane contactor is relatively simple, by membrane silk, epoxy resin and membrane shell package, this kind of membrane contactor is small when running material disturbance, mass transfer efficiency is low.

Description

Technical Field

[0001] This invention relates to the field of membrane contactor technology, and more specifically, to a high-efficiency hollow fiber membrane contactor. Background Technology

[0002] Membrane contactors, unlike membrane separation, do not offer selective separation. Instead, they are membrane systems that bring different substances to contact at a defined interface. The substances on both sides of the membrane do not mix but are transferred from one side to the other via diffusion, thus achieving separation. Membrane contactors are typically made of high-molecular polymers such as polypropylene and polytetrafluoroethylene. They are primarily used for liquid-gas separation, employing techniques such as: vacuum (creating a pressure difference on one side to separate gas from the other); purging (creating a partial pressure difference by separating a missing gas on one side); physical absorption (using the high solubility of a solvent for a gas on the other side to dissolve it and achieve separation); and chemical absorption (using the reaction of a compound with a gas to separate it). Membrane contactor technology is a novel and highly efficient membrane process that has emerged in recent years and is widely used in separation processes across various industries. Therefore, there is a need to develop even more efficient industrial-grade membrane contactors.

[0003] The published patent document CN106422790A shows a novel structure of a membrane contactor with a built-in central tube and baffle, which enhances fluid disturbance and mass transfer. However, the baffle occupies a large amount of space inside the membrane contactor, increasing production costs.

[0004] Therefore, we propose a high-efficiency hollow fiber membrane contactor to solve the above problems. Summary of the Invention

[0005] To overcome the aforementioned deficiencies of the prior art, embodiments of the present invention provide a high-efficiency hollow fiber membrane contactor to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a high-efficiency hollow fiber membrane contactor, comprising: a central distribution tube, wherein the central distribution tube is a hollow long tube, both ends of the central distribution tube are cast in epoxy resin, one end is encapsulated with epoxy resin, and the other end is sealed with epoxy resin, and the central distribution tube is provided with a water guiding groove and a water distribution hole; a hollow fiber membrane, wherein the hollow fiber membrane is a hollow fiber hydrophobic membrane, and the hollow fiber membrane is arranged parallel to the axial direction of the central distribution tube; a thin film, wherein the thin film is a non-porous thin film, and a certain number of hollow fiber membranes are uniformly wrapped around the central distribution tube; and a membrane shell, wherein the central distribution tube, the hollow fiber membrane, and the thin film are all located in the membrane shell.

[0007] This device consists of a central distribution pipe, a hollow fiber membrane, a thin film, and a membrane shell. It does not use baffles, thereby reducing the internal space of the membrane contactor and further reducing costs. Currently, the structure of existing membrane contactors is relatively simple, consisting of membrane fibers, epoxy resin, and a membrane shell. Such membrane contactors have low material disturbance and low mass transfer efficiency during operation.

[0008] In a preferred embodiment, the central distribution pipe has crisscrossing water guide grooves on its outer surface, and the water guide grooves are grooves or convex grooves.

[0009] In a preferred embodiment, the water distribution holes are radially through holes that are uniformly distributed axially, and the water distribution holes can allow material to pass through.

[0010] In a preferred embodiment, the hollow fiber hydrophobic membrane is a hollow fiber hydrophobic membrane filament, and the material of the hollow fiber hydrophobic membrane filament is one or more of the following: polypropylene membrane, polytetrafluoroethylene membrane, polyvinylidene fluoride membrane, perfluoroalkoxy resin membrane, polytetrafluoroethylene propylene membrane, polypropylene membrane with surface hydrophobic modification treatment, polyvinylidene fluoride membrane, and polytetrafluoroethylene membrane.

[0011] In a preferred embodiment, the hollow fiber hydrophobic membrane has a hydrophobic contact angle of 90°-160°, a porosity of 20%-70%, and a pore size of 0.005μm-1μm.

[0012] In a preferred embodiment, the film is made of polyethylene, polypropylene, polyvinyl chloride, polyvinylidene fluoride, and polytetrafluoroethylene.

[0013] In a preferred embodiment, one edge of the film is fixed to the central distribution tube to form a wrap-around connection. The film begins to wrap around the connection, sandwiching a certain number of hollow fiber films between the film and the central distribution tube, and the film rotates around the central distribution tube to wrap evenly.

[0014] In a preferred embodiment, the multiple layers of the thin film and the multiple layers of the hollow fiber film are continuously wrapped to a size slightly smaller than the inner wall size of the membrane shell, and a certain gap is left between the size formed by the thin film wrapping the hollow fiber film and the inner wall of the membrane shell, which serves as a medium flow channel.

[0015] In a preferred embodiment, the membrane shell is made of polyvinyl chloride, chlorinated polyvinyl chloride, polyethylene, high-density polyethylene, acrylonitrile-butadiene-styrene copolymer, stainless steel, or epoxy resin.

[0016] In a preferred embodiment, the diameter of the membrane shell is 25mm-500mm, and the length of the membrane shell is 100mm-5000mm;

[0017] The membrane shell has a pressure resistance of 0MPa-10MPa.

[0018] The technical effects and advantages of this invention are as follows:

[0019] This device consists of a central distribution pipe, a hollow fiber membrane, a thin film, and a membrane shell. It does not use baffles, thereby reducing the internal space of the membrane contactor and further reducing costs. Currently, the structure of existing membrane contactors is relatively simple, consisting of membrane fibers, epoxy resin, and a membrane shell. Such membrane contactors have low material disturbance and low mass transfer efficiency during operation. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the present invention.

[0021] The attached figures are labeled as follows: 1. Central distribution tube, 2. Hollow fiber membrane, 3. Membrane, 4. Membrane shell. Detailed Implementation

[0022] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0023] Reference Figure 1 A high-efficiency hollow fiber membrane contactor, comprising:

[0024] The central distribution pipe 1 is a hollow long pipe. Both ends of the central distribution pipe 1 are cast in epoxy resin. One end is encapsulated with epoxy resin to retain the water inlet channel, and the other end is sealed with epoxy resin. The central distribution pipe 1 has crisscrossing water guide grooves on its outer surface. The water guide grooves are grooves or protrusions. The water distribution holes are radially through holes that are evenly distributed axially. The water distribution holes can pass through the material.

[0025] Hollow fiber membrane 2, which is a hollow fiber hydrophobic membrane, is arranged parallel to the axial direction of the central distribution pipe 1. The hollow fiber membrane 2 has a straight structure, a curved structure, a corrugated structure, a braided structure, etc. The hollow fiber hydrophobic membrane is a hollow fiber hydrophobic membrane filament. The material of the hollow fiber hydrophobic membrane filament is one or more of the following: polypropylene membrane, polytetrafluoroethylene membrane, polyvinylidene fluoride membrane, perfluoroalkoxy resin membrane, polytetrafluoroethylene propylene membrane, polypropylene membrane with surface hydrophobic modification, polyvinylidene fluoride membrane, and polytetrafluoroethylene membrane. The hydrophobic contact angle of the hollow fiber hydrophobic membrane is 90°-160°, its porosity is 20%-70%, and its pore size is 0.005μm-1μm.

[0026] Film 3 is a non-porous film, and the material of film 3 is polyethylene, polypropylene, polyvinyl chloride, polyvinylidene fluoride and polytetrafluoroethylene.

[0027] The film 3 wraps a certain number of hollow fiber membranes 2 evenly around the central distribution tube 1. One edge of the film 3 is fixed to the central distribution tube 1 to form a wrapping connection. The film 3 starts wrapping from the connection and sandwiches a certain number of hollow fiber membranes 2 between the film 3 and the central distribution tube 1. The film 3 rotates around the central distribution tube 1 to wrap evenly.

[0028] The multilayer film 3 and the multilayer hollow fiber membrane 2 are continuously wrapped to a size slightly smaller than the inner wall size of the membrane shell 4, and a certain gap is left between the size formed by the film 3 wrapping the hollow fiber membrane 2 and the inner wall of the membrane shell 4. This gap is the medium flow channel.

[0029] Membrane shell 4, central distribution pipe 1, hollow fiber membrane 2 and thin film 3 are all located in membrane shell 4. The materials of membrane shell 4 are polyvinyl chloride, chlorinated polyvinyl chloride, polyethylene, high-density polyethylene, acrylonitrile-butadiene-styrene copolymer, stainless steel and epoxy resin.

[0030] The diameter of the membrane housing 4 is 25mm-500mm, the length of the membrane housing 4 is 100mm-5000mm, and the pressure resistance of the membrane housing 4 is 0MPa-10MPa. Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A high-efficiency hollow fiber membrane contactor, characterized in that it comprises: The central distribution pipe (1) is a hollow long pipe. Both ends of the central distribution pipe (1) are cast in epoxy resin. One end is encapsulated with epoxy resin and the other end is sealed with epoxy resin. The central distribution pipe is provided with a water guide groove and a water distribution hole. Hollow fiber membrane (2), the hollow fiber membrane (2) is a hollow fiber hydrophobic membrane, the hollow fiber membrane (2) is arranged parallel to the axial direction of the central distribution pipe (1); The film (3) is a non-porous film, and the film (3) has a certain number of hollow fiber membranes (2) uniformly wrapped around the central distribution tube (1); The membrane shell (4), the central distribution tube (1), the hollow fiber membrane (2) and the thin film (3) are all located in the membrane shell (4); The central distribution pipe (1) has crisscrossing water guide grooves on its outer surface, and the water guide grooves are grooves or convex grooves. The water distribution holes are radially through holes that are evenly distributed axially, and the water distribution holes can allow material to pass through. One edge of the film (3) is fixed to the central distribution tube (1) to form a wrapping connection. The film (3) starts to wrap from the connection and a certain number of hollow fiber films (2) are sandwiched between the film (3) and the central distribution tube (1). The film (3) rotates around the central distribution tube (1) and wraps evenly. The multilayer film (3) and the multilayer hollow fiber film (2) are continuously wrapped to a size slightly smaller than the inner wall size of the membrane shell (4), and a certain gap is left between the size formed by the film (3) wrapping the hollow fiber film (2) and the inner wall of the membrane shell (4), which is a medium flow channel.

2. The high-efficiency hollow fiber membrane contactor according to claim 1, characterized in that: The hollow fiber hydrophobic membrane is a hollow fiber hydrophobic membrane filament, and the material of the hollow fiber hydrophobic membrane filament is one or more of the following: polypropylene membrane, polytetrafluoroethylene membrane, polyvinylidene fluoride membrane, perfluoroalkoxy resin membrane, polytetrafluoroethylene propylene membrane, polypropylene membrane with surface hydrophobic modification, polyvinylidene fluoride membrane, and polytetrafluoroethylene membrane.

3. The high-efficiency hollow fiber membrane contactor according to claim 2, characterized in that: The hollow fiber hydrophobic membrane has a hydrophobic contact angle of 90°-160°, a porosity of 20%-70%, and a pore size of 0.005μm-1μm.

4. The high-efficiency hollow fiber membrane contactor according to claim 3, characterized in that: The film (3) is made of polyethylene, polypropylene, polyvinyl chloride, polyvinylidene fluoride and polytetrafluoroethylene.

5. The high-efficiency hollow fiber membrane contactor according to claim 1, characterized in that: The membrane shell (4) is made of polyvinyl chloride, chlorinated polyvinyl chloride, polyethylene, high-density polyethylene, acrylonitrile-butadiene-styrene copolymer, stainless steel, or epoxy resin.

6. The high-efficiency hollow fiber membrane contactor according to claim 5, characterized in that: The diameter of the membrane shell (4) is 25mm-500mm, and the length of the membrane shell (4) is 100mm-5000mm; the pressure resistance of the membrane shell (4) is 0MPa-10MPa.

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