Novel detachable efficient heat and mass transfer air sweeping type membrane distillation assembly

Abstract

The utility model discloses a novel detachable efficient heat and mass transfer air sweeping type membrane distillation component which comprises a shell and a conveying pipeline, a membrane component is arranged on the inner side of the shell, a PTFE membrane and a silica gel gasket are arranged on the membrane component respectively, a plurality of sets of screws are arranged at one end of the membrane component, and air sweeping cavities are formed in the two sides of the top of the membrane component; according to the utility model, air sweeping type membrane distillation is adopted, so that the membrane flux and the distillation efficiency are effectively improved while the mass transfer resistance in the treatment process is reduced; in the distillation process, the hot test feed liquid does not make direct contact with the membrane, the probability and risk of membrane pollution are reduced, the anti-pollution capacity of the membrane is improved, the PTFE membrane is adopted, the product has excellent chemical stability and corrosion resistance, the anti-pollution capacity of the membrane can be effectively improved, the service life of the membrane can be effectively prolonged, and the product has high porosity and high flux and is suitable for industrial production. High-flux filtration or separation is realized, and the production efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of membrane distillation technology, specifically a novel detachable, high-efficiency heat and mass transfer gas-sweeping membrane distillation assembly. Background Technology

[0002] Membrane distillation technology mainly includes four forms: direct contact, air gap, vacuum, and gas sweep. During membrane distillation, problems such as membrane fouling, severe heat transfer loss, and difficulty in membrane disassembly are often encountered.

[0003] The current technology, patent number TW113110502, adopts an air-gap thin-film distillation module. However, the presence of the air gap in this module increases mass transfer resistance, reduces membrane flux, and affects efficiency.

[0004] The existing technology patent number CN202310039732.0 describes a method that uses a direct thin-film distillation module. This central module leads to increased membrane fouling, which greatly affects membrane flux and membrane lifespan. Furthermore, this method cannot achieve the assembly of two-stage or even multi-stage membranes. Utility Model Content

[0005] The purpose of this invention is to provide a novel detachable, high-efficiency heat and mass transfer gas-sweeping membrane distillation assembly to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a novel detachable high-efficiency heat and mass transfer gas-sweeping membrane distillation assembly, comprising a housing and a delivery pipe, wherein a membrane assembly is provided on the inner side of the housing, and a PTFE membrane and a silicone gasket are respectively provided on the membrane assembly, wherein a plurality of screws are provided at one end of the membrane assembly, and purge gas chambers are provided on both sides of the top of the membrane assembly.

[0007] Preferably, the outer shell is a rectangular structure made of stainless steel, and the membrane module is located in the middle of the outer shell, which facilitates the disassembly and assembly of the membrane module and increases the efficiency of the structure's assembly, disassembly and maintenance.

[0008] Preferably, the delivery pipe extends into the interior of the outer casing and is connected to the membrane module to facilitate gas delivery and membrane distillation for efficient heat and mass transfer.

[0009] Preferably, the membrane module is provided with a membrane module cover plate at the top, and the membrane module cover plate is connected to the purge gas chamber. The membrane module cover plate is pressed onto the top surface of the PTFE membrane through the connection between the membrane module cover plate and the purge gas chamber, so that the gas can be subjected to gas scavenging distillation in the membrane module.

[0010] Preferably, the two purge chambers are press-fitted onto the top of the PTFE membrane, and the screws and silicone gaskets are fixedly engaged to ensure the internal structure of the device is securely installed and to improve the stability of the structure during operation.

[0011] Preferably, the screws are M2 screws, and there are multiple sets of screws that are fixedly engaged with the silicone gaskets to facilitate the connection and fixation of the silicone gaskets and improve the airtightness of the structure.

[0012] This utility model proposes a novel detachable, high-efficiency heat and mass transfer gas-swept membrane distillation assembly, which has at least the following beneficial effects:

[0013] This invention employs air-swept membrane distillation, which effectively improves membrane flux and distillation efficiency while reducing mass transfer resistance during the treatment process. During distillation, the hot feed solution does not directly contact the membrane. By preventing direct contact between the hot feed solution and the membrane, the probability and risk of membrane fouling are reduced, improving the membrane's anti-fouling ability. The use of a PTFE membrane, with its excellent chemical stability, corrosion resistance, and low surface energy, effectively enhances the membrane's anti-fouling ability and service life. Furthermore, its high porosity and high flux enable high-flux filtration or separation, improving production efficiency. It facilitates the assembly of two-stage or multi-stage membranes and is easy to disassemble, thereby improving thermal efficiency, water production rate, and the quality of the output product. Attached Figure Description

[0014] Figure 1 This is a perspective view of the present invention.

[0015] In the diagram: 1. Outer shell; 2. Delivery pipe; 3. Membrane module; 4. PTFE membrane; 5. Silicone gasket; 6. Screw; 7. Purge chamber. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Please see Figure 1The present invention provides an embodiment of a novel detachable high-efficiency heat and mass transfer gas-swept membrane distillation assembly, comprising a housing 1 and a delivery pipe 2. A membrane assembly 3 is provided on the inner side of the housing 1. The housing 1 is a rectangular structure made of stainless steel. The membrane assembly 3 is located in the middle of the housing 1, which facilitates the disassembly and assembly of the membrane assembly 3 and increases the efficiency of the structure's assembly, disassembly and maintenance. The delivery pipe 2 extends into the interior of the housing 1 and is connected to the membrane assembly 3 to facilitate the delivery of gas for high-efficiency heat and mass transfer membrane distillation.

[0018] The membrane module 3 is provided with a PTFE membrane 4 and a silicone gasket 5 respectively. One end of the membrane module 3 is provided with multiple sets of screws 6. Two purge gas chambers 7 are press-fitted on the top of the PTFE membrane 4. The screws 6 and the silicone gasket 5 are fixedly engaged to ensure that the internal structure of the device is installed firmly and to improve the stability of the structure operation. The screws 6 are M2 screws. There are multiple sets of screws 6 and they are fixedly engaged with the silicone gasket 5 to facilitate the connection and fixation of the silicone gasket 5 and improve the airtightness of the structure.

[0019] The membrane module 3 has purge chambers 7 on both sides of its top. The top of the membrane module 3 is provided with a membrane module cover plate, which is connected to the purge chambers 7. The membrane module cover plate is pressed onto the top surface of the PTFE membrane 4 through the connection between the membrane module cover plate and the purge chambers 7, so that the gas can be gas-purge distilled in the membrane module 3.

[0020] Working principle: This novel detachable, high-efficiency heat and mass transfer gas-sweeping membrane distillation unit;

[0021] The membrane module is composed of a stainless steel cuboid shell 1 and a purge chamber 7. PTFE membranes 4 are pressed onto both sides of the purge chamber and installed in the membrane module 3. The membrane module cover plate on the membrane module 3 is pressed against the purge chamber 7 at the membrane position. A fixing structure using silicone gaskets 5 and screws 6 is used at the membrane position to ensure the installation is tight and airtight.

[0022] When performing gas-swept membrane distillation for heat and mass transfer, the gas circulating on the hot side is processed into high-temperature and high-humidity gas through the evaporation tower and then reaches the membrane module 3 inside the outer shell 1 through the delivery pipe 2. The hot-side gas passes through the gap between the purge gas chamber 7 and the shell of the membrane module 3. At this time, the cold-side purge air in the purge gas chamber 7 flows in the opposite direction to the hot-side gas and completes heat and mass transfer on the PTFE membrane 4. The water vapor in the membrane module 3 that does not enter the cold side can continue to evaporate and circulate through the circulating fan. Thus, under the operation of this gas-swept membrane distillation structure, higher membrane flux, lower mass transfer resistance and higher evaporation efficiency are achieved.

[0023] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0024] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly, for example, they can refer to a fixed connection or a detachable connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

Claims

1. A novel detachable, high-efficiency heat and mass transfer gas-swept membrane distillation assembly, comprising a housing (1) and a delivery pipe (2), characterized in that: The inner side of the outer shell (1) is provided with a membrane assembly (3), and the membrane assembly (3) is provided with a PTFE membrane (4) and a silicone gasket (5). One end of the membrane assembly (3) is provided with multiple sets of screws (6), and the top of the membrane assembly (3) is provided with purge air chambers (7) on both sides.

2. The novel detachable high-efficiency heat and mass transfer gas-swept membrane distillation assembly according to claim 1, characterized in that: The outer shell (1) is a rectangular structure made of stainless steel, and the membrane assembly (3) is located in the middle of the outer shell (1).

3. The novel detachable high-efficiency heat and mass transfer gas-swept membrane distillation assembly according to claim 1, characterized in that: The delivery pipe (2) extends into the interior of the outer shell (1) and is connected to the membrane module (3).

4. The novel detachable high-efficiency heat and mass transfer gas-swept membrane distillation assembly according to claim 1, characterized in that: The membrane module (3) is provided with a membrane module cover plate on its top, and the membrane module cover plate is connected to the purge gas chamber (7).

5. A novel detachable high-efficiency heat and mass transfer gas-swept membrane distillation assembly according to claim 1, characterized in that: The two purge chambers (7) are press-fitted onto the top of the PTFE membrane (4), and the screws (6) and silicone gaskets (5) are fixedly fitted together.

6. A novel detachable high-efficiency heat and mass transfer gas-swept membrane distillation assembly according to claim 1, characterized in that: The screw (6) is an M2 screw, and there are multiple sets of screws (6) that are fixedly engaged with the silicone gasket (5).

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