Multistage filtering and purifying device for foundry waste gas

Abstract

The utility model discloses casting waste gas multistage filtration purification device, including shell and control switch group, the inside front end downside of shell and rear end upside are fixedly connected with baffle respectively, and the opposite lateral surface of baffle and the inside front and back two sides of shell are fixedly connected with limit support respectively, the right side of shell is opened with opening respectively in front and back, and the inner surface of opening and corresponding limit support is flush, the inside of limit support located at the front is connected with bag filter, and the inside of limit support located at the rear is connected with high -efficient filter, the inside middle part of shell is fixedly connected with electrostatic dust removal board in linear array, the inside top of shell rear side is fixedly connected with exhaust fan, and the left side of shell four corners is opened with mounting hole respectively, and the inside fixedly connected with negative pressure sensor of mounting hole, the device whole integration degree is higher, can carry out sufficient filtration and absorption to dust particle and harmful compound in casting waste gas, avoids casting waste gas influence human health and environmental safety.

Description

Technical Field

[0001] This utility model relates to the field of waste gas purification technology, specifically a multi-stage filtration and purification device for foundry waste gas. Background Technology

[0002] Die casting is an important part of my country's manufacturing industry. However, the problem of waste gas generated during the production process has always been one of the challenges faced by die casting companies. With the continuous improvement of environmental protection awareness, the treatment of die casting waste gas and environmental improvement have become an inevitable trend in the industry's development.

[0003] Die casting exhaust gas contains a large number of harmful substances, such as soot, sulfur dioxide, nitrogen oxides, and hydrocarbons, which are very harmful to human health and the environment. Long-term inhalation of these harmful substances can lead to various diseases such as respiratory diseases, lung diseases, and immune system diseases. At the same time, the emission of these harmful substances also causes serious air pollution and exacerbates the deterioration of air quality. Therefore, we propose a multi-stage filtration and purification device for die casting exhaust gas. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the existing defects and provide a multi-stage filtration and purification device for foundry waste gas. This purification device has a high degree of integration and can fully filter and absorb dust particles and harmful compounds in foundry waste gas, so as to avoid the foundry waste gas from affecting human health and environmental safety, and can effectively solve the problems in the background technology.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a multi-stage filtration and purification device for casting exhaust gas, comprising a housing and a control switch assembly. Partitions are fixedly connected to the lower front side and upper rear side of the housing, respectively. Limiting frames are fixedly connected to the opposite outer sides of the partitions and the front and rear sides of the housing. Openings are provided on the front and rear sides of the right side of the housing, and these openings are flush with the inner surfaces of the corresponding limiting frames. A bag filter is snapped into the front limiting frame, and a high-efficiency filter is snapped into the rear limiting frame. Electrostatic dust removal plates are fixedly connected in a linear array in the middle of the housing. An exhaust fan is fixedly connected to the rear side of the top surface of the housing. Mounting holes are provided at the four corners of the left side of the housing, and negative pressure sensors are fixedly connected inside the mounting holes. An air inlet is provided at the front of the lower surface of the housing, and an air inlet pipe connected to an external pipe is fixedly connected to the air inlet. A cover plate is provided on the right side of the housing, and the cover plate is connected to the housing by bolts. Wherein: the input terminal of the control switch group is electrically connected to the output terminal of the external power supply, and the output terminal of the control switch group is electrically connected to the input terminals of the exhaust fan and the electrostatic dust removal plate respectively, and the control switch group is bidirectionally electrically connected to the negative pressure sensor.

[0006] Furthermore, the bag filter consists of two parts: a filter bag and a bag cage. Angle steel for fixing the upper end of the filter bag is fixedly connected to the front and rear sides of the upper part of the bag cage, and a ring-shaped sealing strip is fixedly connected to the lower surface of the bag cage. The surface of the sealing strip is in contact with the surface of the corresponding limiting frame. The bag filter can perform preliminary filtration of larger dust particles in the casting exhaust gas, preventing such dust from clogging the downstream high-efficiency filter and affecting the normal use of the purification device.

[0007] Furthermore, it also includes a sealing nut and a clamping stud. The upper surface of the outer shell has a through hole, and the upper end of the through hole is fixedly connected to the sealing nut. The internal thread of the sealing nut is connected to the clamping stud. The lower ends of the clamping studs on the front and rear sides respectively contact the upper surface of the angle steel of the bag filter and the upper surface pressure strip of the high-efficiency filter. The clamping studs can press and eliminate the gaps between the bag filter and the high-efficiency filter and the outer shell, so as to avoid internal air leakage during the use of the purification device, which would affect the purification efficiency and quality of casting waste gas, and thus make the use of the purification device safer.

[0008] Furthermore, it also includes a closed cover, a linear motor, and a scraper. A through groove is provided in the middle of the left side of the outer casing, and a closed cover is fixedly connected to the outside of the through groove. A linear motor is fixedly connected inside the closed cover, and a scraper is fixedly connected to the slider surface of the linear motor. The blade of the scraper is in contact with the surface of the corresponding electrostatic dust removal plate. The input end of the linear motor is electrically connected to the output end of the control switch group. The scraper can periodically scrape the dust off the surface of the electrostatic dust removal plate to prevent excessive dust accumulation from affecting the effectiveness of the purification device.

[0009] Furthermore, adhesive plates are fixedly connected to the front and rear ends of the inner surface of the cover plate, and the position of the adhesive plates corresponds to the opening on the right side of the outer shell. The adhesive plates are in contact with the side surfaces of the corresponding bag filter and high-efficiency filter. The adhesive plates can ensure the sealing of the purification device during use, and can also squeeze the bag filter and high-efficiency filter to avoid gaps between the bag filter and high-efficiency filter and the outer shell, which would affect the purification effect.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows: This multi-stage filtration and purification device for foundry waste gas has the following advantages: 1. This purification device has a high degree of integration and can fully filter and absorb dust particles and harmful compounds in casting exhaust gas, preventing casting exhaust gas from affecting human health and environmental safety.

[0011] 2. The bag filter installed can perform preliminary filtration of larger dust particles in the casting exhaust gas, preventing this type of dust from clogging the downstream high-efficiency filter and affecting the normal operation of the purification device.

[0012] 3. The clamping studs can press and eliminate the gaps between the bag filter and the high-efficiency filter and the housing, preventing internal air leakage during use and affecting the purification efficiency and quality of casting waste gas, thus making the use of the purification device safer. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the structure from the upper side of this utility model; Figure 3 This is a schematic diagram of the right-side cross-sectional structure of the present invention; Figure 4 This is a schematic diagram of the structure from the left side of this utility model.

[0014] In the diagram: 1. Housing, 2. Control switch assembly, 3. Cover plate, 4. Air inlet duct, 5. Sealing nut, 6. Clamping stud, 7. Enclosed cover, 8. Linear motor, 9. Partition plate, 10. Bag filter, 11. High-efficiency filter, 12. Exhaust fan, 13. Electrostatic dust removal plate, 14. Scraper, 15. Negative pressure sensor, 16. Limit bracket. Detailed Implementation

[0015] 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.

[0016] Please see Figure 1-4 This embodiment provides a technical solution: a multi-stage filtration and purification device for casting exhaust gas, including a housing 1 and a control switch group 2. The lower front side and the upper rear side of the inner front of the housing 1 are respectively fixedly connected to a partition 9, and the opposite outer side of the partition 9 and the front and rear sides of the inner side of the housing 1 are respectively fixedly connected to a limit frame 16. The front and rear sides of the right side of the housing 1 are respectively opened, and the openings are flush with the inner surface of the corresponding limit frame 16. The limit frame 16 at the front end is fitted with a bag filter 10, and the limit frame 16 at the rear end is fitted with a high-efficiency filter 11. The middle of the inner side of the housing 1 is fixedly connected to an electrostatic dust removal plate 13 in a linear array. The rear side of the inner top surface of the housing 1 is fixedly connected to an exhaust fan 12. The four corners of the left side of the housing 1 are respectively opened with mounting holes, and the mounting holes are fixedly connected to negative pressure sensors 15. The front end of the lower surface of the housing 1 is opened with an air inlet, and the air inlet is fixedly connected to an air inlet pipe 4 connected to an external pipe. The right side of the housing 1 is provided with a cover plate 3, and the cover plate 3 is connected to the housing 1 by bolts. Wherein: the input terminal of control switch group 2 is electrically connected to the output terminal of external power supply, and the output terminal of control switch group 2 is electrically connected to the input terminals of exhaust fan 12 and electrostatic dust removal plate 13 respectively, and control switch group 2 is bidirectionally electrically connected to negative pressure sensor 15.

[0017] In this embodiment, the bag filter 10 consists of two parts: a filter bag and a bag cage. Angle steel for fixing the upper end of the filter bag is fixedly connected to the front and rear sides of the upper part of the bag cage, and a ring-shaped sealing strip is fixedly connected to the lower surface of the bag cage. The surface of the sealing strip is in contact with the surface of the corresponding limiting frame 16. The bag filter 10 can perform preliminary filtration of larger dust particles in the casting exhaust gas, preventing such dust from clogging the downstream high-efficiency filter 11 and affecting the normal use of the purification device.

[0018] In this embodiment, a sealing nut 5 and a clamping stud 6 are also included. A through hole is provided on the upper surface of the outer shell 1. The upper end of the through hole is fixedly connected to the sealing nut 5, and the internal thread of the sealing nut 5 is connected to the clamping stud 6. The lower ends of the clamping studs 6 on the front and rear sides are in contact with the upper surface of the upper angle steel of the bag filter 10 and the upper surface pressure strip of the high-efficiency filter 11, respectively. The clamping studs 6 can press and eliminate the gaps between the bag filter 10 and the high-efficiency filter 11 and the outer shell 1, so as to avoid internal air leakage during the use of the purification device, which would affect the purification efficiency and quality of the casting waste gas, and thus make the use of the purification device safer.

[0019] In this embodiment, a closed cover 7, a linear motor 8, and a scraper 14 are also included. A through groove is provided in the middle of the left side of the outer casing 1, and the closed cover 7 is fixedly connected to the outside of the through groove. The linear motor 8 is fixedly connected to the inside of the closed cover 7. The scraper 14 is fixedly connected to the slider surface of the linear motor 8, and the cutting edge of the scraper 14 is in contact with the surface of the corresponding electrostatic dust removal plate 13. The input end of the linear motor 8 is electrically connected to the output end of the control switch group 2. The scraper 14 can periodically scrape the dust off the surface of the electrostatic dust removal plate 13 to prevent excessive dust accumulation from affecting the effectiveness of the purification device.

[0020] In this embodiment, adhesive plates are fixedly connected to the front and rear ends of the inner surface of the cover plate 3, and the position of the adhesive plates corresponds to the opening on the right side of the outer shell 1. The adhesive plates are in contact with the side surfaces of the corresponding bag filter 10 and high-efficiency filter 11. The adhesive plates can ensure the sealing of the purification device during use, and can also squeeze the bag filter 10 and high-efficiency filter 11 to avoid gaps between the bag filter 10 and high-efficiency filter 11 and the outer shell 1, which would affect the purification effect.

[0021] The working principle of the multi-stage filtration and purification device for casting exhaust gas provided by this utility model is as follows: The air inlet pipe 4 is connected to the exhaust port of the external casting equipment. After the exhaust gas enters the purification device, it first undergoes preliminary filtration through the bag filter 10 to achieve the effect of filtering out larger dust particles. When the filtered exhaust gas passes between the electrostatic dust removal plates 13, the electrostatic dust removal plates 13 adsorb the remaining dust. When the dust-filtered and adsorbed exhaust gas passes through the high-efficiency filter 11, it adsorbs the hazardous compounds contained therein to achieve the effect of purifying the exhaust gas. At the same time, the exhaust fan 12 exhausts the gas outward, making the inside of the outer shell 1 reach a negative pressure state, thereby ensuring the gas flow inside the outer shell 1. Meanwhile, the negative pressure sensor 15 monitors the pressure state at various points inside the equipment to ensure the effectiveness of replacing or cleaning corresponding parts according to the equipment condition. The dust on the surface of the electrostatic dust removal plate 13 is scraped off by the linear motor 8 and the scraper 14. The scraped dust is removed through the replacement port when replacing the high-efficiency filter 11, thereby ensuring the safe use of the purification equipment.

[0022] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A multi-stage filtration and purification device for foundry waste gas, characterized in that: Includes a housing (1) and a control switch assembly (2). The lower front side and the upper rear side of the housing (1) are respectively fixedly connected to a partition (9). The opposite outer sides of the partition (9) and the front and rear sides of the housing (1) are respectively fixedly connected to a limit frame (16). The front and rear sides of the right side of the housing (1) are respectively provided with openings, and the openings are flush with the inner surface of the corresponding limit frame (16). The limit frame (16) at the front end is fitted with a bag filter (10), and the limit frame (16) at the rear end is fitted with a high-efficiency filter (HEPA filter). 11) An electrostatic dust removal plate (13) is fixedly connected in a linear array in the middle of the inner part of the outer shell (1). An exhaust fan (12) is fixedly connected to the rear side of the top surface of the inner part of the outer shell (1). Mounting holes are opened at the four corners of the left side of the outer shell (1), and a negative pressure sensor (15) is fixedly connected inside the mounting holes. An air inlet is opened at the front end of the lower surface of the outer shell (1), and an air inlet pipe (4) connected to the external pipe is fixedly connected at the air inlet. A cover plate (3) is set on the right side of the outer shell (1), and the cover plate (3) is connected to the outer shell (1) by bolts. Wherein: the input end of the control switch group (2) is electrically connected to the output end of the external power supply, and the output end of the control switch group (2) is electrically connected to the input end of the exhaust fan (12) and the electrostatic dust removal plate (13) respectively, and the control switch group (2) is bidirectionally electrically connected to the negative pressure sensor (15).

2. The multi-stage filtration and purification device for foundry waste gas according to claim 1, characterized in that: The bag filter (10) consists of two parts: a filter bag and a bag cage. Angle steel for fixing the upper end of the filter bag is fixedly connected to the front and rear sides of the upper end of the bag cage, and a ring-shaped sealing strip is fixedly connected to the lower surface of the bag cage. The surface of the sealing strip is in contact with the surface of the corresponding limiting frame (16).

3. The multi-stage filtration and purification device for foundry waste gas according to claim 2, characterized in that: It also includes a sealing nut (5) and a clamping stud (6). The upper surface of the outer shell (1) is provided with a perforation. The upper end of the perforation is fixedly connected to the sealing nut (5), and the internal thread of the sealing nut (5) is connected to the clamping stud (6). The lower ends of the clamping studs (6) on the front and rear sides are in contact with the upper surface of the upper angle steel of the bag filter (10) and the upper surface pressure strip of the high-efficiency filter (11), respectively.

4. The multi-stage filtration and purification device for foundry waste gas according to claim 1, characterized in that: It also includes a closed cover (7), a linear motor (8) and a scraper (14). A through groove is provided in the middle of the left side of the outer shell (1), and the closed cover (7) is fixedly connected to the outside of the through groove. The linear motor (8) is fixedly connected inside the closed cover (7). The scraper (14) is fixedly connected to the slider surface of the linear motor (8), and the cutting edge of the scraper (14) is in contact with the surface of the corresponding electrostatic dust removal plate (13). The input end of the linear motor (8) is electrically connected to the output end of the control switch group (2).

5. The multi-stage filtration and purification device for foundry waste gas according to claim 1, characterized in that: The inner surface of the cover plate (3) is fixedly connected to the front and rear ends of the cover plate (3), and the position of the cover plate corresponds to the opening on the right side of the outer shell (1). The cover plate is in contact with the side surface of the corresponding bag filter (10) and high efficiency filter (11).

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