Waste gas purification device for foundry industry

Abstract

The utility model discloses a waste gas purification device for foundry industry, which comprises a filter box body, a non-woven fabric layer I, an electrostatic spinning film layer, a non-woven fabric layer II, a metal wire mesh, a non-woven fabric layer III, an air bag and a non-woven fabric layer IV, the non-woven fabric layer I and the non-woven fabric layer II are respectively arranged on two sides of the electrostatic spinning film layer; the metal wire mesh is installed on the side, away from the electrostatic spinning film layer, of the second non-woven fabric layer, the third non-woven fabric layer is installed on the side, away from the second non-woven fabric layer, of the metal wire mesh, and the air bag is installed on the side, away from the metal wire mesh, of the third non-woven fabric layer. The fourth non-woven fabric layer is mounted on the side, far away from the third non-woven fabric layer, of the air bag, fine particulate matter can be adsorbed, the effect of purifying waste gas is achieved, the three layers of materials can generate hydrophilic groups, in the waste gas filtering process, hydrophilic particulate matter in the waste gas can be effectively adsorbed, and the filtering efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of foundry waste gas treatment technology, specifically a waste gas purification device for the foundry industry. Background Technology

[0002] Casting is a method of pouring liquid metal into a casting cavity that conforms to the shape of the part, and then cooling and solidifying it to obtain the part or blank. With the development of casting technology, my country's casting industry has widely adopted self-hardening furan resin and phenolic resin sand molding. Resin sand molds emit a lot of waste gas during pouring and cooling. The existing waste gas treatment is to filter it with non-woven filter materials in the treatment device.

[0003] Existing nonwoven filter materials are all composed of multi-layer fiber materials, mostly natural or chemical fibers. Without plasma treatment, these fiber materials have poor adsorption capacity for hydrophilic particulate matter in exhaust gas. Moreover, after long-term use, nonwoven filter materials may develop mold or mildew when left unused. Utility Model Content

[0004] The purpose of this invention is to provide a waste gas purification device for the foundry industry to solve the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a waste gas purification device for the foundry industry, comprising a filter box, a nonwoven fabric layer one, an electrospun membrane layer, a nonwoven fabric layer two, a metal wire mesh, a nonwoven fabric layer three, an air bag, and a nonwoven fabric layer four. The nonwoven fabric layer one and the nonwoven fabric layer two are respectively installed on both sides of the electrospun membrane layer. The metal wire mesh is installed on the side of the nonwoven fabric layer two away from the electrospun membrane layer. The nonwoven fabric layer three is installed on the side of the metal wire mesh away from the nonwoven fabric layer two. The air bag is installed on the side of the nonwoven fabric layer three away from the metal wire mesh. The nonwoven fabric layer four is installed on the side of the air bag away from the nonwoven fabric layer three.

[0006] In a preferred embodiment, the electrospun film layer is made of PVA, carbon nanotubes and nano-silver, and the electrospun film layer is subjected to plasma modification treatment.

[0007] In a preferred embodiment: the nonwoven fabric layer one, nonwoven fabric layer two, nonwoven fabric layer three, and nonwoven fabric layer four are all glass fiber nonwoven fabrics, and the nonwoven fabric layer one and nonwoven fabric layer two are both plasma treated. The metal mesh is T-shaped, with an opening in the middle of the air bladder. One end of the metal mesh passes through nonwoven fabric layer three, the opening, and nonwoven fabric layer four, and one end of the metal mesh has a pipe-like structure and is located inside a heat transfer pipe. One end of the heat transfer pipe is connected to the filter box, and the other end is connected to a heat recovery box.

[0008] In a preferred embodiment: the first nonwoven fabric layer is sewn to one side of the electrospun film layer by sewing thread, and the second nonwoven fabric layer is sewn to the other side of the electrospun film layer by sewing thread.

[0009] In a preferred embodiment, the thickness of the airbag is 0.5-1 cm.

[0010] In a preferred embodiment: the nonwoven fabric layer three and the nonwoven fabric layer four are bonded and fixed to the air bladder with hot melt adhesive. The filter box is provided with two symmetrically distributed air inlets and air outlets. The air outlet is provided with a pump. The lower end of the filter box is provided with a base. The device body is installed on the base and is located inside the filter box.

[0011] Compared with the prior art, the beneficial effects achieved by this utility model are:

[0012] This invention utilizes a filter housing, a non-woven fabric layer one, an electrospun membrane layer, a non-woven fabric layer two, a metal wire mesh, a non-woven fabric layer three, an air bladder, and a non-woven fabric layer four. A pump draws exhaust gas into the filter housing. Because the initial exhaust gas contains a large number of large particles, it is first filtered through the high-temperature and corrosion-resistant non-woven fabric layer one, and then through the electrospun membrane layer, which has thermal, electrical, and antibacterial functions, to adsorb fine particles. The presence of metal wire mesh or metal wires in the filter material prevents static electricity generated during high-speed filtration, reducing the static charge on the non-woven filter material. The air is filtered through a second layer of nonwoven fabric, followed by a third and fourth layer of nonwoven fabric to remove any safety hazards. This process purifies the exhaust gas. The outermost layer, the fourth layer, also reduces heat loss and protects personnel from burns. In this multi-layered nonwoven filter material, the first, electrospun membrane, and second layers have all undergone plasma modification, creating hydrophilic groups that effectively adsorb hydrophilic particles, improving filtration efficiency. Attached Figure Description

[0013] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] In the diagram: 1. Filter box; 2. Nonwoven fabric layer one; 3. Electrospun membrane layer; 4. Nonwoven fabric layer two; 5. Metal wire mesh; 6. Nonwoven fabric layer three; 7. Air bladder; 8. Nonwoven fabric layer four; 9. Heat transfer pipe; 10. Heat recovery box; 11. Air inlet; 12. Air outlet; 13. Base; 14. Equipment body. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. 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 1 This utility model provides a technical solution: a waste gas purification device for the foundry industry, comprising a filter box 1, a nonwoven fabric layer 1 2, an electrospun membrane layer 3, a nonwoven fabric layer 2 4, a metal wire mesh 5, a nonwoven fabric layer 3 6, an air bag 7, and a nonwoven fabric layer 4 8. The nonwoven fabric layer 1 2 and the nonwoven fabric layer 2 4 are respectively installed on both sides of the electrospun membrane layer 3. The metal wire mesh 5 is installed on the side of the nonwoven fabric layer 2 4 away from the electrospun membrane layer 3. The nonwoven fabric layer 3 6 is installed on the side of the metal wire mesh 5 away from the nonwoven fabric layer 2 4. The air bag 7 is installed on the side of the nonwoven fabric layer 3 6 away from the metal wire mesh 5. The nonwoven fabric layer 4 8 is installed on the side of the air bag 7 away from the nonwoven fabric layer 3 6.

[0018] The electrospun film layer 3 is made of PVA, carbon nanotubes and silver nanoparticles. The PVA has a molecular weight of 50,000 to 300,000 and a content of 2-10%. The carbon nanotubes have a diameter of 1-30 nm and a content of 0.1-5%. The electrospun film layer 3 has undergone plasma modification treatment.

[0019] Nonwoven fabric layer 1 (2), nonwoven fabric layer 2 (4), nonwoven fabric layer 3 (6), and nonwoven fabric layer 4 (8) are all made of glass fiber nonwoven fabric. Nonwoven fabric layer 1 (2) and nonwoven fabric layer 2 (4) have undergone plasma treatment using oxygen, nitrogen, and argon as the plasma treatment gases. The metal mesh 5 is T-shaped, with an opening in the middle of the air bladder 7. One end of the metal mesh 5 passes through nonwoven fabric layer 3 (6), the opening, and nonwoven fabric layer 4 (8), and the other end of the metal mesh 5 has a pipe-like structure and is located inside the heat transfer pipe 9. One end of the heat transfer pipe 9 is connected to the filter box 1, and the other end is connected to the heat recovery box 10. The mesh size of the metal mesh 5 is 0.5 square centimeters. Alternatively, the metal mesh 5 can be replaced with metal wires with a wire arrangement density of 2 wires / cm, arranged in the weft direction.

[0020] The nonwoven fabric layer 2 is sewn to one side of the electrospun film layer 3 by sewing thread, and the nonwoven fabric layer 4 is sewn to the other side of the electrospun film layer 3 by sewing thread.

[0021] The thickness of the airbag 7 is 0.5-1cm. The airbag 7 reduces the generation of heat radiation because the gas inside the airbag 7 is in a closed space, which reduces the flow of air and can maximize the recovery and utilization of waste heat, that is, it plays a role in heat preservation.

[0022] The nonwoven fabric layer 6 and the nonwoven fabric layer 8 are bonded and fixed to the air bag 7 with hot melt adhesive, which further reduces the heat radiation of residual heat. The filter box 1 is provided with two symmetrically distributed air inlets 11 and air outlet pipes 12. The air outlet pipe 12 is equipped with a pump. The lower end of the filter box 1 is provided with a base 13. The equipment body 14 is installed on the base 13 and is located inside the filter box 1.

[0023] The working principle of this utility model is as follows: The airflow containing waste gas enters through the air inlet 11 on the filter box 1. It first comes into contact with the non-woven fabric layer 2 and undergoes preliminary filtration to remove larger particulate impurities. Then, the waste gas passes through the electrospun membrane layer 3. Due to its plasma modification treatment and special material composition, it has a good adsorption capacity for hydrophilic particles in the waste gas, and is further purified. Next, the waste gas passes through the non-woven fabric layer 4 and is filtered again before passing through the metal wire mesh 5. The metal wire mesh 5 can provide some support and uniform airflow. At the same time, one end of it is in the heat transfer pipe 9, which can conduct heat to the heat recovery box 10 for waste heat recovery. After that, the waste gas passes through the non-woven fabric layer 6, the air bag 7, and the non-woven fabric layer 8. The air bag 7 reduces heat radiation, and the non-woven fabric layers 6 and 8 further filter the gas. Finally, the purified gas is discharged.

[0024] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A waste gas purification device for the foundry industry, characterized in that: The filter includes a filter housing (1), a nonwoven fabric layer one (2), an electrospun membrane layer (3), a nonwoven fabric layer two (4), a metal wire mesh (5), a nonwoven fabric layer three (6), an air bag (7), and a nonwoven fabric layer four (8). The nonwoven fabric layer one (2) and the nonwoven fabric layer two (4) are respectively installed on both sides of the electrospun membrane layer (3). The metal wire mesh (5) is installed on the side of the nonwoven fabric layer two (4) away from the electrospun membrane layer (3). The nonwoven fabric layer three (6) is installed on the side of the metal wire mesh (5) away from the nonwoven fabric layer two (4). The air bag (7) is installed on the side of the nonwoven fabric layer three (6) away from the metal wire mesh (5). The nonwoven fabric layer four (8) is installed on the side of the air bag (7) away from the nonwoven fabric layer three (6).

2. The waste gas purification device for the foundry industry according to claim 1, characterized in that: The electrospun film layer (3) is made of PVA, carbon nanotubes and nano silver, and the electrospun film layer (3) is subjected to plasma modification treatment.

3. The waste gas purification device for the foundry industry according to claim 1, characterized in that: The nonwoven fabric layer 1 (2), nonwoven fabric layer 2 (4), nonwoven fabric layer 3 (6) and nonwoven fabric layer 4 (8) are all glass fiber nonwoven fabrics. The nonwoven fabric layer 1 (2) and nonwoven fabric layer 2 (4) are both plasma treated. The metal wire mesh (5) is T-shaped. An opening is provided in the middle of the air bag (7). One end of the metal wire mesh (5) passes through the nonwoven fabric layer 3 (6), the opening and the nonwoven fabric layer 4 (8). One end of the metal wire mesh (5) is a pipe-like structure and is located in the heat transfer pipe (9). One end of the heat transfer pipe (9) is connected to the filter box (1) and the other end is connected to the heat recovery box (10).

4. The waste gas purification device for the foundry industry according to claim 1, characterized in that: The first nonwoven fabric layer (2) is sewn to one side of the electrospun film layer (3) by sewing thread, and the second nonwoven fabric layer (4) is sewn to the other side of the electrospun film layer (3) by sewing thread.

5. The waste gas purification device for the foundry industry according to claim 1, characterized in that: The thickness of the airbag (7) is 0.5-1cm.

6. The waste gas purification device for the foundry industry according to claim 5, characterized in that: The nonwoven fabric layer three (6) and the nonwoven fabric layer four (8) are bonded and fixed to the air bag (7) by hot melt adhesive. The filter box (1) is provided with two symmetrically distributed air inlets (11) and air outlet pipes (12). The air outlet pipe (12) is provided with a pump. The filter box (1) is provided with a base (13) at the lower end. The equipment body (14) is installed on the base (13) and is located inside the filter box (1).

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