Hot rolling tail gas purification and dust removal device for aluminum and aluminum alloy plate strip production

Abstract

The invention relates to the technical field of purification and dust removal devices, in particular to an aluminum and aluminum alloy plate strip production hot rolling tail gas purification and dust removal device which comprises a first treatment box, one end of the first treatment box is fixedly connected with an absorption pipeline, and the other end of the first treatment box is fixedly connected with a second treatment box. A plurality of rolling type filtering mechanisms are arranged in the first treatment box, and tail gas generated during production of aluminum and aluminum alloy plate strips is filtered through the rolling type filtering mechanisms. Tail gas is sucked into the absorption pipeline through the gas suction mechanism, the tail gas entering the first treatment box is sequentially filtered in a graded mode through the multiple rolling type filtering mechanisms, the filtered tail gas is exhausted through the exhaust pipe, and filtered matter on the surfaces of the rolling type filtering mechanisms is scraped and collected through the scraping mechanism; and the rolling type filtering mechanism is cleaned through the back flushing mechanism, and filtered objects blown out by the back flushing mechanism are collected through the collecting mechanism, so that the service life of the rolling type filtering mechanism is prolonged.

Description

Technical Field

[0001] This invention relates to the field of purification and dust removal equipment, specifically to a purification and dust removal equipment for hot-rolled exhaust gas from the production of aluminum and aluminum alloy plates and strips. Background Technology

[0002] The hot rolling process for aluminum and aluminum alloy sheet and strip production involves high temperatures (approximately 490-550℃). The emulsion primarily serves a cooling function, evaporating upon heating to form oil mist exhaust gas. The main components of the emulsion are "water + emulsion." The characteristics of the oil mist exhaust gas generated during hot rolling are as follows: This type of oil mist is mainly composed of three parts. The first part is a mist-like oil liquid with particles ranging from 3um to 20um, accounting for a large proportion, more than 96% of the total oil mist. The second part is water vapor generated after heating, and the third part is aerosol gas generated after heating, with particles ranging from 0.01 to 5um, accounting for a very small portion of the total oil mist.

[0003] Currently, one common technology for purifying such high-temperature oil mist exhaust gas is to use media such as filter screens to intercept and filter the oily exhaust gas. However, this technology has obvious shortcomings in practical applications: because the oil components in hot rolling oil mist have high viscosity and are continuous, the captured oil is very easy to adhere to, accumulate and mix with each other on the surface of the filter material, forming a viscous oil film or sludge, which quickly blocks the pores of the filter material, resulting in a decrease in purification efficiency. At this time, it is necessary to stop the machine to replace or clean the filter material, which increases maintenance costs and production interruption time, and also significantly shortens the service life of filter elements such as filter screens. To address this, we have introduced a purification and dust removal device for hot rolling tail gas in the production of aluminum and aluminum alloy plates and strips. Summary of the Invention

[0004] The purpose of this invention is to provide a device for purifying and removing dust from the hot-rolled exhaust gas of aluminum and aluminum alloy sheet and strip production, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A device for purifying and removing dust from hot-rolled exhaust gas in the production of aluminum and aluminum alloy sheets and strips includes a first treatment box, one end of which is fixedly connected to an absorption pipe, and a second treatment box, which is fixedly connected to the other end of the first treatment box. The first treatment box contains several rolling filter mechanisms to filter the exhaust gas generated during the production of aluminum and aluminum alloy sheets and strips. Each rolling filter mechanism is movably connected to a backflushing mechanism for cleaning. The lower end of each rolling filter mechanism is in contact with a collection structure, which is connected to the inside of the first treatment box to collect the filtered material blown out by the backflushing mechanism. The outer side of the rolling filter mechanism is in contact with the scraping mechanism, which is connected inside the first processing box. The scraping mechanism scrapes away the filter material on the surface of the rolling filter mechanism. The second processing box is equipped with a suction mechanism, which generates suction to allow the exhaust gas generated during the production of aluminum and aluminum alloy sheets and strips to enter the absorption pipe and pass through the first and second processing boxes in sequence. An exhaust pipe is fixedly connected to the outer side of the second processing box, and a demister is fixedly connected to the inner side of the first processing box. Several second guide pipes are fixedly connected inside the first processing box. Preferably, the rolling filter mechanism includes an annular filter screen, one end of which is fixedly connected to a connecting ring and the other end of which is fixedly connected to a first connecting plate. The ends of the connecting ring and the first connecting plate away from the annular filter screen are movably connected to the first processing box. A first motor is fixedly connected to the outside of the first processing box, and the output end of the first motor is fixedly connected to the first connecting plate.

[0006] Preferably, the backflushing mechanism includes two second connecting discs, the outer sides of which are movably connected to the connecting ring and the inner side of the first connecting disc, respectively. One end of one second connecting disc is fixedly connected to the inner side of the first processing box. A first connecting plate is fixedly connected between the two second connecting discs. The lower side of the first connecting plate is in contact with two first sealing rollers. The first sealing rollers are movably connected between the two second connecting discs. A third sealing roller is movably connected between the two second connecting discs. The outer side of the third sealing roller is in contact with the inner side of the annular filter screen.

[0007] Preferably, the upper end of the first connecting plate is provided with a plurality of exhaust holes, and an air guide pipe is fixedly connected to the upper end of the first connecting plate. The end of the air guide pipe away from the first connecting plate passes through the first processing box and is fixedly connected to the output end of the air pump. The air pump is fixedly connected to the outside of the first processing box.

[0008] Preferably, the collection mechanism includes a first collection box, the lower end of which is fixedly connected to the inside of a first processing box, the upper end of which is in contact with the outside of an annular filter screen, two second sealing rollers are movably connected to the inside of the first collection box, the upper side of which is in contact with the outside of the annular filter screen, one end of the first collection box is fixedly connected to a first guide pipe, and the end of the first guide pipe away from the first collection box extends into the external environment and is fixedly connected to an absorption pipe.

[0009] Preferably, the scraping mechanism includes a scraper, which is U-shaped and has one end extending into the second collection box and fixedly connected to it.

[0010] Preferably, a second connecting plate is installed on one side of the first processing box. Two first storage boxes and a second storage box are fixedly connected to the side of the second connecting plate near the first processing box. The first storage box extends into the first collection box through a first connecting hole, and the second storage box extends into the second collection box through a second connecting hole. Both the first connecting hole and the second connecting hole are located on the outside of the first processing box.

[0011] Preferably, the air intake mechanism includes a fan, which is movably connected inside the second processing box. A drive motor is fixedly connected to the outside of the second processing box, and the output end of the drive motor is fixedly connected to the fan.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows: exhaust gas is drawn into the absorption pipe through the suction mechanism, and the exhaust gas entering the first treatment box is filtered in stages through several rolling filter mechanisms. After filtration, the exhaust gas is discharged through the exhaust pipe. The filter material on the surface of the rolling filter mechanism is scraped off and collected by the scraping mechanism. The rolling filter mechanism is cleaned by the back-blowing mechanism. The filter material blown out by the back-blowing mechanism is collected by the collection mechanism. This realizes the cleaning and collection of filter material adhering to the surface of the rolling filter mechanism during production, increases the service life of the rolling filter mechanism, and improves production efficiency. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional cross-sectional view of the present invention; Figure 3 This is a three-dimensional cross-sectional view of the positional relationship between the first connecting plate and the first collecting box of the present invention; Figure 4 This is a three-dimensional structural diagram of the second connecting disk and the connecting ring in a separated state according to the present invention; Figure 5 This is a three-dimensional structural diagram illustrating the connection relationship between the first connecting disc and the annular filter screen of the present invention; Figure 6 This is a three-dimensional structural diagram of the position of the first guide tube of the present invention; Figure 7 This is a three-dimensional structural diagram showing the positions of the first connecting hole and the second connecting hole of the present invention; Figure 8 This is a three-dimensional cross-sectional view of the location of the second guide tube in this invention.

[0014] In the diagram: 1. First processing box; 2. Second processing box; 3. Drive motor; 4. Exhaust pipe; 5. Air pump; 6. Air guide pipe; 7. First guide pipe; 8. Second guide pipe; 9. Absorption pipe; 10. First motor; 11. Fan; 12. Demister; 13. Annular filter screen; 14. Scraper; 15. Connecting ring; 16. Exhaust vent; 17. Second collection box; 18. Third sealing roller; 19. First connecting plate; 20. Second connecting hole; 21. First connecting hole; 22. First storage box; 23. Second storage box; 24. Second connecting plate; 25. First connecting disc; 26. Second sealing roller; 27. First collection box; 28. Second connecting disc; 29. ​​First sealing roller. Detailed Implementation

[0015] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0016] Please see Figure 1-8 The present invention provides a technical solution: Example 1: A device for purifying and removing dust from hot-rolled exhaust gas in the production of aluminum and aluminum alloy sheet and strip includes a first treatment box 1, an absorption pipe 9 fixedly connected to one end of the first treatment box 1, and a second treatment box 2 fixedly connected to one end of the first treatment box 1. The first treatment box 1 is equipped with several rolling filter mechanisms to filter the exhaust gas generated during the production of aluminum and aluminum alloy sheet and strip. A back-blowing mechanism is movably connected inside the rolling filter mechanism to clean the rolling filter mechanism. The lower end of the rolling filter mechanism is in contact with a collection structure, and the collection mechanism is connected to the inside of the first treatment box 1 to collect the filtered material blown out by the back-blowing mechanism.

[0017] The outer side of the rolling filter mechanism is in contact with the scraping mechanism, which is connected to the first processing box 1. The scraping mechanism scrapes away the filter material on the surface of the rolling filter mechanism. The second processing box 2 is equipped with a suction mechanism, which generates suction to allow the exhaust gas generated during the production of aluminum and aluminum alloy plates and strips to enter the absorption pipe 9 and pass through the first processing box 1 and the second processing box 2 in sequence. An exhaust pipe 4 is fixedly connected to the outer side of the second processing box 2. A demister 12 is fixedly connected to the inner side of the first processing box 1. Several second guide pipes 8 are fixedly connected to the first processing box 1.

[0018] Example 2: Based on Embodiment 1, in order to improve the filtration effect of the filter screen, the rolling filter mechanism includes an annular filter screen 13. One end of the annular filter screen 13 is fixedly connected to the connecting ring 15, and the other end is fixedly connected to the first connecting plate 25. The ends of the connecting ring 15 and the first connecting plate 25 away from the annular filter screen 13 are movably connected to the first processing box 1. A first motor 10 is fixedly connected to the outside of the first processing box 1. The output end of the first motor 10 is fixedly connected to the first connecting plate 25. The aperture of the annular filter screen 13 on the right side of the first processing box 1 is larger than that of the annular filter screen 13 on the left side. Through the arrangement of the two annular filters 13, the oil particles in the exhaust gas generated during the production of aluminum and aluminum alloy plates and strips are filtered in sequence.

[0019] The backflushing mechanism includes two second connecting discs 28. The outer sides of the two second connecting discs 28 are movably connected to the connecting ring 15 and the inner side of the first connecting disc 25, respectively. One end of one second connecting disc 28 is fixedly connected to the inner side of the first processing box 1. A first connecting plate 19 is fixedly connected between the two second connecting discs 28. The lower side of the first connecting plate 19 is in contact with two first sealing rollers 29. The first sealing rollers 29 are movably connected between the two second connecting discs 28. An elastic layer is provided on the outer side of the first sealing rollers 29. When the annular filter screen 13 rotates, it will drive the first sealing rollers 29 to rotate. The two rotating first sealing rollers 29 block the gas blown out through the exhaust hole 16 and guide it into the first collection box 27. A third sealing roller 18 is movably connected between the two second connecting discs 28. The outer side of the third sealing roller 18 is in contact with the inner side of the annular filter screen 13.

[0020] The upper end of the first connecting plate 19 has several exhaust holes 16. The upper end of the first connecting plate 19 is fixedly connected to an air guide pipe 6. The end of the air guide pipe 6 away from the first connecting plate 19 passes through the first processing box 1 and is fixedly connected to the output end of the air pump 5. The air pump 5 is fixedly connected to the outside of the first processing box 1. When the air pump 5 is started, gas is input into the air guide pipe 6. The gas entering the air guide pipe 6 will be blown into the surface of the annular filter screen 13 through several exhaust holes 16. The gas is guided by two first sealing rollers 29 and a second sealing roller 26, so that the gas carries the blown-out debris into the first collection box 27.

[0021] The collection mechanism includes a first collection box 27, the lower end of which is fixedly connected to the inside of the first processing box 1, the upper end of which is in contact with the outside of the annular filter screen 13, and two second sealing rollers 26 are movably connected to the inside of the first collection box 27. The upper side of the second sealing rollers 26 is in contact with the outside of the annular filter screen 13. One end of the first collection box 27 is fixedly connected to the first guide pipe 7, and the end of the first guide pipe 7 away from the first collection box 27 extends into the external environment and is fixedly connected to the absorption pipe 9.

[0022] The scraping mechanism includes a scraper 14, which is U-shaped. One end of the scraper 14 extends into the second collection box 17 and is fixedly connected to the second collection box 17. During the clockwise rotation of the annular filter screen 13, the scraper 14 scrapes off the filter material attached to the surface of the annular filter screen 13. At the same time, the position of the third sealing roller 18, which is set inside the annular filter screen 13, corresponds to the position of the scraper 14. The setting of the third sealing roller 18 prevents the filter material from entering the inside of the annular filter screen 13 when the scraper 14 is scraping off the filter material.

[0023] A second connecting plate 24 is installed on one side of the first processing box 1. Two first storage boxes 22 and a second storage box 23 are fixedly connected to the side of the second connecting plate 24 near the first processing box 1. The first storage box 22 extends into the first collection box 27 through the first connecting hole 21, and the second storage box 23 extends into the second collection box 17 through the second connecting hole 20. Both the first connecting hole 21 and the second connecting hole 20 are opened on the outside of the first processing box 1. The first storage box 22 and the second storage box 23 can be taken out from the first collection box 27 and the second collection box 17 by pulling the second connecting plate 24.

[0024] The suction mechanism includes a fan 11, which is movably connected inside the second processing box 2. A drive motor 3 is fixedly connected to the outside of the second processing box 2, and the output end of the drive motor 3 is fixedly connected to the fan 11.

[0025] Working principle: When in use, the drive motor 3 is turned on to drive the fan 11 to start rotating. When the fan 11 rotates, the exhaust gas generated during the production of aluminum and aluminum alloy sheet and strip is sucked into the absorption pipe 9. The exhaust gas entering the absorption pipe 9 will first enter the first treatment box 1. The first motor 10 drives the first connecting plate 25 connected to it to rotate. The first connecting plate 25 drives the annular filter screen 13 to rotate clockwise. Under the guidance of the second guide pipe 8 on the right, the exhaust gas will first pass through the annular filter screen 13 on the right for filtration. Since the filter aperture of the annular filter screen 13 on the right is larger than that on the left, some oil particles will be filtered out when the exhaust gas passes through the annular filter screen 13 on the right. Then, under the guidance of the second guide pipe 8 on the left, the exhaust gas enters the annular filter screen 13 on the left and filters out some oil particles again. After passing through the two annular filters 13, the exhaust gas enters the demister 12 for further filtration. Then the exhaust gas is discharged through the exhaust pipe 4. As the annular filter screen 13 rotates clockwise, the scraper 14 scrapes off the filter material adhering to the surface of the annular filter screen 13. At the same time, the position of the third sealing roller 18, which is set inside the annular filter screen 13, corresponds to the position of the scraper 14. The setting of the third sealing roller 18 prevents the filter material from entering the inside of the annular filter screen 13 when the scraper 14 is scraping off the filter material. The filter material scraped off by the scraper 14 will eventually enter the second collection box 17 and fall into the second storage box 23 for storage. Since the two second connecting discs 28 are movably connected to the first connecting disc 25 and the connecting ring 15 respectively, and one end of one second connecting disc 28 is fixedly connected to the inside of the first processing box 1, the first connecting plate 19 located between the two second connecting discs 28 will not rotate when the annular filter screen 13 rotates. The gas is input into the air guide pipe 6 by the start of the air pump 5. The gas entering the air guide pipe 6 will be blown into the surface of the annular filter screen 13 through several exhaust holes 16. The gas is guided by the two first sealing rollers 29 and the second sealing rollers 26, so that the gas carries the blown-out debris into the first collection box 27. The gas finally re-enters the absorption pipe 9 through the first guide pipe 7. The blown-off filter screen is stored in the first storage box 22. The first storage box 22 and the second storage box 23 can be taken out from the first collection box 27 and the second collection box 17 by pulling the second connecting plate 24.

[0026] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for purifying and removing dust from hot-rolled exhaust gas in the production of aluminum and aluminum alloy plates and strips, comprising a first treatment box, one end of which is fixedly connected to an absorption pipe, characterized in that: A second processing box is fixedly connected to one end of the first processing box. The first processing box is equipped with several rolling filter mechanisms to filter the exhaust gas generated during the production of aluminum and aluminum alloy plates and strips. A back-blowing mechanism is movably connected inside the rolling filter mechanism to clean it. The lower end of the rolling filter mechanism is in contact with a collection structure. The collection mechanism is connected to the inside of the first processing box to collect the filtered material blown out by the back-blowing mechanism. The outer side of the rolling filter mechanism is in contact with the scraping mechanism, which is connected to the first processing box. The scraping mechanism scrapes away the filter material on the surface of the rolling filter mechanism. The second processing box is equipped with a suction mechanism, which generates suction to allow the exhaust gas generated during the production of aluminum and aluminum alloy plates and strips to enter the absorption pipe and pass through the first and second processing boxes in sequence. An exhaust pipe is fixedly connected to the outer side of the second processing box, and a demister is fixedly connected to the inner side of the first processing box. Several second guide pipes are fixedly connected to the first processing box.

2. The hot-rolling tail gas purification and dust removal device for aluminum and aluminum alloy sheet and strip production according to claim 1, characterized in that: The rolling filter mechanism includes an annular filter screen, one end of which is fixedly connected to a connecting ring and the other end of which is fixedly connected to a first connecting plate. The ends of the connecting ring and the first connecting plate away from the annular filter screen are movably connected to the inside of a first processing box. A first motor is fixedly connected to the outside of the first processing box, and the output end of the first motor is fixedly connected to the first connecting plate.

3. The hot-rolling tail gas purification and dust removal device for aluminum and aluminum alloy sheet and strip production according to claim 2, characterized in that: The backflushing mechanism includes two second connecting discs. The outer sides of the two second connecting discs are movably connected to the connecting ring and the inner side of the first connecting disc, respectively. One end of one second connecting disc is fixedly connected to the inner side of the first processing box. A first connecting plate is fixedly connected between the two second connecting discs. The lower side of the first connecting plate is in contact with two first sealing rollers. The first sealing rollers are movably connected between the two second connecting discs. A third sealing roller is movably connected between the two second connecting discs. The outer side of the third sealing roller is in contact with the inner side of the annular filter screen.

4. The hot-rolling tail gas purification and dust removal device for aluminum and aluminum alloy sheet and strip production according to claim 3, characterized in that: The upper end of the first connecting plate is provided with several exhaust holes. An air guide pipe is fixedly connected to the upper end of the first connecting plate. The end of the air guide pipe away from the first connecting plate passes through the first processing box and is fixedly connected to the output end of the air pump. The air pump is fixedly connected to the outside of the first processing box.

5. The hot-rolling tail gas purification and dust removal device for aluminum and aluminum alloy sheet and strip production according to claim 2, characterized in that: The collection mechanism includes a first collection box, the lower end of which is fixedly connected to the inside of a first processing box. The upper end of the first collection box is in contact with the outside of an annular filter screen. Two second sealing rollers are movably connected to the inside of the first collection box. The upper side of the second sealing rollers is in contact with the outside of the annular filter screen. One end of the first collection box is fixedly connected to a first guide pipe. The end of the first guide pipe away from the first collection box extends into the external environment and is fixedly connected to an absorption pipe.

6. The hot-rolling tail gas purification and dust removal device for aluminum and aluminum alloy sheet and strip production according to claim 1, characterized in that: The scraping mechanism includes a scraper, which is U-shaped and has one end extending into the second collection box and fixedly connected to it.

7. A device for purifying and removing dust from hot-rolled exhaust gas in the production of aluminum and aluminum alloy plates and strips according to claim 5 or 6, characterized in that: A second connecting plate is installed on one side of the first processing box. Two first storage boxes and a second storage box are fixedly connected to the side of the second connecting plate near the first processing box. The first storage box extends into the first collection box through the first connecting hole, and the second storage box extends into the second collection box through the second connecting hole. Both the first connecting hole and the second connecting hole are opened on the outside of the first processing box.

8. A device for purifying and removing dust from hot-rolled tail gas in the production of aluminum and aluminum alloy plates and strips according to claim 5 or 6, characterized in that: The air intake mechanism includes a fan, which is movably connected inside the second processing box. A drive motor is fixedly connected to the outside of the second processing box, and the output end of the drive motor is fixedly connected to the fan.

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