Polytetrafluoroethylene microporous membrane for purifying PM2.5

Abstract

The utility model discloses a polytetrafluoroethylene microporous membrane for purifying PM2.5 (Particulate Matter 2.5), which comprises a base made of non-woven fabric, a purification layer fixedly connected to the upper surface of the base, a polytetrafluoroethylene microporous membrane, a waterproof layer fixedly connected to the upper surface of the purification layer, and a metal net fixedly connected to the lower surface of the base, by means of the device, it can be guaranteed that the filtering performance of the whole structure can still be kept in a humid environment, damage caused by mechanical damage to the microporous membrane is reduced, and the service life of the microporous membrane can be prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of microporous membranes, in particular to a polytetrafluoroethylene microporous membrane for purifying PM2.5. Background Art

[0002] Polytetrafluoroethylene coated filter materials can be widely used in steel mills, coal-fired power plants, waste incineration power plants, cement plants, cement kiln heads and tails, chemical industries, coal-fired boilers and other dust filtration supporting bag dust collectors, playing an unprecedented backbone role in environmental protection. However, the durability and firmness of existing polytetrafluoroethylene microporous membranes are poor and are easily damaged. For example, a Chinese patent discloses "a polytetrafluoroethylene microporous membrane for purifying PM2.5", and its application number is: "201220377326.2". It is made by adding additives to polytetrafluoroethylene dispersed resin and mixing it into a paste, and then extruding the paste resin through a mold to form a polytetrafluoroethylene-based tape, and then degreasing the base tape at high temperature, and then stretching the degreased base tape in three dimensions to form a fiber membrane with a three-dimensional cross-shaped structure, and finally shaping the membrane formed by the fiber with a three-dimensional cross-shaped structure, and improving the stability of the membrane structure, but the polytetrafluoroethylene microporous membrane is not wear-resistant and has no waterproof performance. Utility Model Content

[0003] The purpose of the utility model is to solve at least one of the technical problems existing in the prior art and to provide a polytetrafluoroethylene microporous membrane for purifying PM2.5. By compositely molding a non-woven fabric, a polytetrafluoroethylene microporous membrane and a needle-punched felt, the filtration effect of the polytetrafluoroethylene microporous membrane can be enhanced while increasing the waterproof effect, which is beneficial to ensuring that the entire structure can still maintain its filtration performance in a humid environment. By arranging a metal mesh, a high-temperature resistant and wear-resistant layer, the structural strength and stability of the polytetrafluoroethylene microporous membrane can be enhanced, which is beneficial to improving the adaptability of the microporous membrane in high temperature and harsh environments and reducing the damage of the microporous membrane caused by mechanical damage, thereby extending its service life.

[0004] The utility model also provides a polytetrafluoroethylene microporous membrane for purifying PM2.5 as mentioned above, comprising: a substrate, the substrate is a non-woven fabric, a purification layer is fixedly connected to the upper surface of the substrate, the purification layer is a polytetrafluoroethylene microporous membrane, a waterproof layer is fixedly connected to the upper surface of the purification layer, a metal mesh is fixedly connected to the lower surface of the substrate, a high temperature resistant layer is fixedly connected to the lower surface of the metal mesh, and a wear-resistant layer is fixedly connected to the lower surface of the high temperature resistant layer. Through the above devices, it can be ensured that the entire structure can still maintain its filtering performance in a humid environment, and the damage of the microporous membrane caused by mechanical damage can be reduced, which is beneficial to extending its service life.

[0005] According to the polytetrafluoroethylene microporous membrane for purifying PM2.5 described in the utility model, the wear-resistant layer is a machine-made cloth, and the polytetrafluoroethylene microporous membrane is composed of polytetrafluoroethylene. The above device is beneficial to ensuring the wear resistance of the microporous membrane.

[0006] According to the polytetrafluoroethylene microporous membrane for purifying PM2.5 described in the utility model, the waterproof layer is a needle-punched felt, and the needle-punched felt is composed of fiber material. The above device is beneficial to increasing the waterproof performance of the microporous membrane.

[0007] According to the polytetrafluoroethylene microporous membrane for purifying PM2.5 described in the utility model, the metal mesh is composed of twill weave, and the metal mesh is composed of aluminum alloy. The above device is beneficial to enhance the stability of the microporous membrane structure.

[0008] According to the polytetrafluoroethylene microporous membrane for purifying PM2.5 described in the utility model, the high temperature resistant layer is composed of glass fiber, and the non-woven fabric and machine-made fabric are both composed of polyester fiber. The above device is beneficial to enhancing the high temperature resistance of the microporous membrane.

[0009] According to the polytetrafluoroethylene microporous membrane for purifying PM2.5 described in the utility model, a soft frame is fixedly connected to the side surface of the base, and the soft frame wraps the purification layer, the waterproof layer, the high temperature resistant layer and the wear-resistant layer. The above device is beneficial to ensure the stability of the microporous membrane.

[0010] Beneficial Effects

[0011] 1. Compared with the existing technology, the polytetrafluoroethylene microporous membrane for purifying PM2.5 can enhance the filtering effect of the polytetrafluoroethylene microporous membrane while increasing the waterproof effect by stacking non-woven fabric, polytetrafluoroethylene microporous membrane and needle-punched felt, which is beneficial to ensure that the entire structure can still maintain its filtering performance in a humid environment.

[0012] 2. Compared with the existing technology, the polytetrafluoroethylene microporous membrane for purifying PM2.5 can enhance the structural strength and stability of the polytetrafluoroethylene microporous membrane by setting a metal mesh, a high temperature resistant layer and a wear-resistant layer, which is beneficial to improving the adaptability of the microporous membrane in high temperature and harsh environments and reducing the damage of the microporous membrane caused by mechanical damage, thereby extending its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The utility model is further described below in conjunction with the accompanying drawings and embodiments;

[0014] Figure 1 This is a three-dimensional structural diagram of the polytetrafluoroethylene microporous membrane for purifying PM2.5 of the utility model;

[0015] Figure 2This is a bottom-up structural diagram of the polytetrafluoroethylene microporous membrane for purifying PM2.5 of the utility model;

[0016] Figure 3 This is a cross-sectional structural diagram of the polytetrafluoroethylene microporous membrane for purifying PM2.5 of the utility model;

[0017] Figure 4 This is a diagram of the internal structure of the polytetrafluoroethylene microporous membrane for purifying PM2.5 of the utility model.

[0018] Legend:

[0019] 1. Waterproof layer; 2. Purification layer; 3. Base; 4. Metal mesh; 5. High temperature resistant layer; 6. Wear-resistant layer; 7. Soft frame. DETAILED DESCRIPTION

[0020] This section will describe in detail the specific embodiments of the utility model. The preferred embodiments of the utility model are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the utility model, but it cannot be understood as a limitation on the protection scope of the utility model.

[0021] Reference Figure 1-4 The utility model embodiment is a polytetrafluoroethylene microporous membrane for purifying PM2.5, which includes: a substrate 3, which is used as the basis of the entire structure to provide stable support for other layers. The substrate 3 is a non-woven fabric. The upper surface of the substrate 3 is fixedly connected with a purification layer 2 for filtering PM2.5. The purification layer 2 is a polytetrafluoroethylene microporous membrane, which is composed of polytetrafluoroethylene. The upper surface of the purification layer 2 is fixedly connected with a waterproof layer 1 for waterproofing while ensuring filtration. The waterproof layer 1 is a needle-punched felt, which is composed of fiber material. The lower surface of the substrate 3 is fixedly connected with a metal mesh 4 for enhancing the strength of the structure of the microporous membrane.

[0022] The metal mesh 4 is composed of twill weave, and the metal mesh 4 is composed of aluminum alloy. A high-temperature resistant layer 5 is fixedly connected to the lower surface of the metal mesh 4 for enhancing the high-temperature resistance of the microporous membrane and extending its service life. The high-temperature resistant layer 5 is composed of glass fiber. A wear-resistant layer 6 is fixedly connected to the lower surface of the high-temperature resistant layer 5 for enhancing the wear resistance of the microporous membrane. The wear-resistant layer 6 is machine-made cloth. Both the non-woven fabric and the machine-made cloth are composed of polyester fiber and have good filtering performance. A soft frame 7 is fixedly connected to the side surface of the base 3 for ensuring a firm connection between the layers. The soft frame 7 wraps the purification layer 2, the waterproof layer 1, the high-temperature resistant layer 5 and the wear-resistant layer 6.

[0023] Working principle: The polytetrafluoroethylene microporous membrane equipment for purifying PM2.5 has a unique multi-layer structure and efficient filtering performance. Its core component is the polytetrafluoroethylene microporous membrane, that is, the purification layer 2. As the main filtering medium, it plays a vital role in the filtration process. The setting of the waterproof layer 1 (needle felt) and the metal mesh 4 enables the waterproof layer 1 to block moisture and other liquids from passing through the microporous membrane, keeping the filtration environment dry and stable. The metal mesh 4 provides additional support and stability, and also helps to filter out larger impurity particles. A high temperature resistant layer 5 and a wear-resistant layer 6 are also designed to adapt to various harsh working environments. The high temperature resistant layer 5 is made of glass fiber material, which can maintain stable filtering performance under high temperature conditions. The wear-resistant layer 6 is made of machine-made cloth material, which has high wear resistance and can extend the service life of the equipment.

[0024] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A polytetrafluoroethylene microporous membrane for purifying PM2.5, characterized in that: include: A substrate (3), wherein the substrate (3) is a non-woven fabric, a purification layer (2) is fixedly connected to the upper surface of the substrate (3), the purification layer (2) is a polytetrafluoroethylene microporous membrane, a waterproof layer (1) is fixedly connected to the upper surface of the purification layer (2), a metal mesh (4) is fixedly connected to the lower surface of the substrate (3), a high temperature resistant layer (5) is fixedly connected to the lower surface of the metal mesh (4), and a wear-resistant layer (6) is fixedly connected to the lower surface of the high temperature resistant layer (5).

2. A polytetrafluoroethylene microporous membrane for purifying PM2.5 according to claim 1, characterized in that: The wear-resistant layer (6) is machine-made cloth, and the polytetrafluoroethylene microporous membrane is made of polytetrafluoroethylene.

3. A polytetrafluoroethylene microporous membrane for purifying PM2.5 according to claim 1, characterized in that: The waterproof layer (1) is a needle-punched felt, and the needle-punched felt is made of fiber material.

4. A polytetrafluoroethylene microporous membrane for purifying PM2.5 according to claim 1, characterized in that: The metal mesh (4) is formed by twill weaving and is made of aluminum alloy.

5. A polytetrafluoroethylene microporous membrane for purifying PM2.5 according to claim 1, characterized in that: The high temperature resistant layer (5) is made of glass fiber, and the non-woven fabric and machine-made fabric are both made of polyester fiber.

6. A polytetrafluoroethylene microporous membrane for purifying PM2.5 according to claim 2, characterized in that: A soft frame (7) is fixedly connected to the side surface of the base (3), and the soft frame (7) wraps the purification layer (2), the waterproof layer (1), the high temperature resistant layer (5) and the wear-resistant layer (6).

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