Furnace nose inner wall cleaning method

Abstract

The invention discloses a furnace nose inner wall cleaning method which comprises the following steps: S1, after a production line is shut down, moving out a zinc pot below a furnace nose, extending a purging device into the furnace nose from the lower part of the furnace nose, starting the purging device, introducing high-pressure nitrogen, moving and rotating the purging device to each position of the inner wall of the furnace nose, and cleaning the inner wall of the furnace nose; metal ash on the inner wall is purged and cleaned through high-pressure nitrogen, and the cleaned metal ash falls from the lower part of the furnace nose until no metal ash falls; and S2, the inner wall of the blown furnace nose is continuously cleaned through a brush roller assembly, it is guaranteed that cleaning dead corners are thoroughly cleaned, and when no metal ash falls from the lower portion of the furnace nose, cleaning is completed. When the inner wall of the furnace nose is cleaned, the purging device and the brush roller assembly are matched for cleaning, the cleaning efficiency of metal ash is improved, the interior of the furnace nose is cleaned more thoroughly, and then the product quality is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of galvanizing / aluminum coating production, and in particular to a method for cleaning the inner wall of a furnace nose. Background Art

[0002] Due to the unique nature of the continuous hot-dip galvanizing / aluminum production line, high-temperature molten metal (e.g., 450°C zinc / 650°C aluminum) is applied to a hot iron substrate (400-700°C). A sealed furnace nose is placed between the substrate heating furnace and the zinc / aluminum pot where the coating metal is dissolved. The nose tip is immersed in the zinc pot to isolate the air and maintain coating quality. The evaporation of the hot molten metal causes a large amount of metal (zinc / aluminum) to adhere to the inner wall of the nose. During continuous production, especially for products requiring high-quality finishes, this metal dust can fall onto the substrate, causing defects and resulting in substandard coated products. Therefore, thorough cleaning of the interior of the nose can significantly reduce the degradation caused by this defect. This area operates in a high-temperature environment (galvanizing temperatures are around 470°C, and aluminum-silicon production temperatures are around 660°C). Care must be taken when cleaning this area to prevent this metal dust from blowing into the furnace and contaminating the furnace environment. Furthermore, cleaning must be performed without damaging the interior or related structures. Since the upper end of the furnace nose is a sealed structure, a small hole is usually reserved at the upper end for cleaning. The cleaning in the existing technology only relies on a pipe to be manually inserted into the small hole to swing and change the position for random cleaning. It cannot guarantee that all areas are cleaned. At the same time, the large pipe diameter cannot achieve thorough cleaning. Summary of the Invention

[0003] In view of the above-mentioned deficiencies in the prior art, the purpose of the present invention is to provide a method for cleaning the inner wall of a furnace nose, which solves the problem in the prior art that the inner wall of the furnace nose is not cleaned thoroughly, which easily causes metal ash to fall onto the substrate and cause product defects.

[0004] To achieve the above object, the present invention adopts the following technical solutions:

[0005] A method for cleaning the inner wall of a furnace nose, characterized in that it comprises the following steps:

[0006] S1. After the production line is shut down, remove the zinc pot under the furnace nose, extend the purge device from the bottom of the furnace nose into the interior, turn on the purge device, and introduce high-pressure nitrogen. Move and rotate the purge device to various positions on the inner wall of the furnace nose, and use high-pressure nitrogen to purge and clean the metal ash on the inner wall. The cleaned metal ash falls from the bottom of the furnace nose until no more metal ash falls.

[0007] S2. Use the brush roller assembly to continue cleaning the inner wall of the furnace nose after blowing to ensure that the dead corners are thoroughly cleaned until no metal ash falls from under the furnace nose.

[0008] When the above method is used to clean the inner wall of the furnace nose, the cleaning efficiency of the metal ash is improved by cooperating with the blowing device and the brush roller assembly, so that the inside of the furnace nose is cleaned more thoroughly, thereby ensuring product quality.

[0009] Preferably, the brush roller assembly used in step S2 includes a single-sided brush roller for cleaning one side of the inner wall and a double-sided brush roller for cleaning both sides of the inner wall at the same time. The specific steps of use are as follows:

[0010] S21. When there is strip steel in the furnace nose, use a single-sided brush roller to clean the inner wall of the furnace nose in sequence. After the inner wall is cleaned, clean the surface of the strip steel.

[0011] S22. When there is no strip steel in the furnace nose, select a double-sided brush roller to clean the upper and lower walls of the furnace nose at the same time.

[0012] Preferably, the purging device includes a long tube, one end of which is a connecting part, which is connected to an external high-pressure air pump through a hose, and the other end of the long tube is a cleaning part, on which a plurality of nozzles are arranged, and the nozzles surround the cleaning part and are arranged to be tilted downward.

[0013] With the above-mentioned structural design, the nozzle on the long tube is set at a downward-inclined reverse angle. Therefore, it is possible to reach into the interior from the bottom of the furnace nose for cleaning. Compared with the method of reaching into the interior through a hose from the reserved hole above for cleaning, the dead corners above can be cleaned. At the same time, the setting of multiple nozzles can improve the cleaning efficiency and make the cleaning more thorough.

[0014] Preferably, four nozzles are evenly arranged on the cleaning part, and the angle between the nozzles and the long tube is 40°.

[0015] With the above-mentioned structural design, four nozzles can be set in four directions, so that high-pressure air blowing cleaning can be performed on multiple positions at the same time, and the long tube can be moved and rotated at the same time to achieve dead-angle cleaning at different positions. Furthermore, a 40° angle is designed between the nozzle and the long tube, which not only ensures that the blown high-pressure gas acts on the inner wall of the furnace nose to quickly separate the metal ash downward, but also prevents the metal ash from rushing upward into the heating furnace.

[0016] Preferably, the inner diameter of the long tube is larger than the inner diameter of the nozzle, which can further increase the pressure of the high-pressure nitrogen and improve its cleaning ability.

[0017] Preferably, the long tube is formed by detachably connecting a plurality of connecting tubes, and sealing rings are provided at the connection points of the connecting tubes.

[0018] Preferably, a hand-holding portion is provided adjacent to the connecting portion, the hand-holding portion and the connecting portion are bent at 10-30 degrees, and anti-slip grooves are provided on the hand-holding portion.

[0019] With the above-mentioned structural design, the protective pattern design on the handle can ensure that it will not slip when wearing protective clothing and gloves. At the same time, the handle and the connecting part are bent at a certain angle. When the manual hand-held tool is cleaned under the furnace nose, a certain position difference can be maintained with the upper end to prevent high-temperature metal ash from falling on the hands, thereby improving the safety of the tool.

[0020] Preferably, the single-sided brush roller includes a first telescopic rod, a first mounting bracket is provided at the end of the first telescopic rod, and a single-row brush roller is provided on the first mounting bracket; the double-sided brush roller includes a second telescopic rod, a second mounting bracket is provided at the end of the second telescopic rod, and a double-row brush roller is provided on the second mounting bracket.

[0021] By adopting the above structural design, a brush roller assembly consisting of a single-sided brush roller and a double-sided brush roller can be selected according to different conditions inside the furnace nose, thereby improving the cleaning efficiency and cleaning effect of the inner wall of the furnace nose.

[0022] Preferably, the bristles on the single-row brush roller and the double-row brush roller are made of nylon material or metal steel wire material, and the length of the bristles is 20-50 mm.

[0023] With the above structural design, when the temperature inside the furnace nose is normal, the bristles can be made of nylon material; when the temperature inside the furnace nose is high, the bristles can be made of metal steel wire material.

[0024] Preferably, the second mounting frame is in an "H"-shaped structure, the second telescopic rod is welded and fixed to the middle part of the second mounting frame, and the double-row brush rollers are detachably arranged at the upper and lower ends of the second mounting frame, and the double-row brush rollers and the second telescopic rod are arranged perpendicular to each other; the upper and lower maximum heights of the double-row brush rollers are 360 mm, and the width is 200 mm. The height is set to correspond to the height of the inner wall of the furnace nose. After extending into the furnace nose, the double-row brush rollers contact the upper and lower inner walls respectively.

[0025] With the above structural design, the upper and lower maximum heights of the double-row brush rollers of the double-sided brush rollers are set according to the internal space of the furnace nose, which can achieve simultaneous cleaning of the upper and lower walls at one time, further improving the cleaning effect and efficiency of the inner wall of the furnace nose.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] When cleaning the inner wall of the furnace nose, the present invention cooperates with the purge device and the brush roller assembly to improve the cleaning efficiency of the metal ash, making the interior of the furnace nose clean more thoroughly, thereby ensuring product quality;

[0028] 1. The purging device adopts a downward-inclined reverse angle setting through the nozzle on the long tube. Therefore, high-pressure nitrogen can be blown into the interior from the bottom of the furnace nose to clean the metal ash attached to the inner wall of the furnace nose. Compared with the cleaning method of extending the hose into the interior from the reserved hole above, the dead corner above the furnace nose can be cleaned. At the same time, the setting of multiple nozzles can improve the cleaning efficiency and clean more thoroughly.

[0029] 2. The brush roller assembly can select a single-sided brush roller or a double-sided brush roller according to different conditions inside the furnace nose, thereby improving the cleaning efficiency and cleaning effect of the inner wall of the furnace nose. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a structural schematic diagram of the purge device in the present invention;

[0031] Figure 2 yes Figure 1 A schematic structural diagram of another embodiment of the middle purge device;

[0032] Figure 3 It is a structural schematic diagram of the single-sided brush roller in the present invention;

[0033] Figure 4 It is a structural schematic diagram of the double-sided brush roller of the present invention;

[0034] Figure 5 yes Figure 4 Schematic diagram of the structure of the double-sided brush roller from another angle.

[0035] In the picture:

[0036] Blowing device 10, long tube 11, connecting part 111, cleaning part 112, connecting pipe 113, sealing ring 114, hand-held part 115, anti-slip pattern 116, connecting pattern 117, nozzle 12, single-sided brush roller 21, first telescopic rod 211, first mounting frame 212, single-row brush roller 213, double-sided brush roller 22, second telescopic rod 221, second mounting frame 222, double-row brush roller 223. DETAILED DESCRIPTION

[0037] In order to explain the technical content, structural features, achieved objectives and effects of the present invention in detail, the following is a detailed description in conjunction with the embodiments and the accompanying drawings.

[0038] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. In the description of the present invention, it should be noted that the orientation or position relationship indicated by the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0039] A method for cleaning the inner wall of a furnace nose comprises the following steps:

[0040] S1. After the production line is shut down, remove the zinc pot under the furnace nose, extend the purge device 10 from the bottom of the furnace nose into the interior, turn on the purge device 10, introduce high-pressure nitrogen, move and rotate the purge device 10 to various positions on the inner wall of the furnace nose, and use high-pressure nitrogen to purge and clean the metal ash on the inner wall. The cleaned metal ash falls from the bottom of the furnace nose until no more metal ash falls;

[0041] S2. Use the brush roller assembly to continue cleaning the inner wall of the furnace nose after blowing to ensure that the dead corners are thoroughly cleaned until no metal ash falls from under the furnace nose.

[0042] See also Figure 1 The purging device 10 includes a long tube 11, one end of which is a connecting portion 111, which is connected to an external high-pressure air pump through a hose, and the other end of the long tube 11 is a cleaning portion 112, on which a plurality of nozzles 12 are arranged, and the nozzles 12 surround the cleaning portion 112 and are arranged to be tilted downward. In the present invention, the purging device 10 extends from bottom to top into the interior of the furnace nose, and the nozzles 12 are tilted downward in a manner called a reverse angle. Since metal ash cannot be blown into the heating furnace from the upper substrate inlet, and a high-pressure tube is inserted from the upper reserved hole for cleaning from top to bottom, the problem of incomplete cleaning of the position above the reserved hole will also occur. Therefore, the present application adopts a bottom-to-top approach, and adopts a reverse-angle nozzle 12, which can penetrate deep into the position above the upper reserved hole for cleaning, thereby improving the cleaning effect as much as possible.

[0043] In this embodiment, four nozzles 12 are evenly spaced on the cleaning portion 112, and the angle between the nozzles 12 and the long tube 11 is 40°. This angle is the optimal angle determined after long-term testing, but the present invention is not limited to this angle. The number of nozzles 12 is also not limited to four. The present application designs four nozzles to simultaneously meet the requirements of high-pressure nitrogen cleaning in four directions, thereby improving cleaning efficiency.

[0044] In this embodiment, the inner diameter of the long tube 11 is greater than the inner diameter of the nozzle 12. Specifically, the inner diameter of the long tube 11 is 30 mm, and the inner diameter of the nozzle 12 is 10 mm.

[0045] In this embodiment, the long tube 11 and the nozzle 12 are made of stainless steel, and the nozzle 12 is fixed to the long tube 11 by welding.

[0046] In this embodiment, a connection pattern 117 is provided on the connection portion 111 where the connection portion 111 is connected to the hose, so as to improve the stability of the connection with the hose.

[0047] See also Figure 2 In another embodiment, the long tube 11 is formed by detachably connecting multiple connecting tubes 113, and the specific connection method is threaded connection, and a sealing ring 114 is provided at the connection of the connecting tube 113, which can further improve the sealing effect of the connection and prevent the gas pressure of the tool from being reduced due to poor sealing effect.

[0048] Furthermore, a hand-held portion 115 is provided adjacent to the connecting portion 111 . The hand-held portion 115 and the connecting portion 111 are bent at 10-30 degrees, and anti-slip grooves 116 are provided on the hand-held portion 115 .

[0049] The working principle of the purge device 10 is as follows:

[0050] The connecting portion 111 of the long tube 11 is connected and fixed to the hose, and a clamp is used to fix the hose outside the connection to prevent it from falling off under high pressure. The other end of the hose is connected to an external high-pressure air pump to provide high-pressure nitrogen. Then, the operator wears protective clothing, holds the long tube 11, and extends the cleaning portion 112 below the furnace nose into the interior, and introduces high-pressure nitrogen. The high-pressure gas cleans the metal ash inside the furnace nose. At the same time, the long tube 11 is moved and rotated to clean different positions, and the cleaned metal ash falls to the ground along the inner wall of the furnace nose. The cleaning portion 112 can go deep into the top of the furnace nose for cleaning, which solves the problem that the upper position cannot be cleaned when entering from the reserved hole above the furnace nose for cleaning as much as possible. At the same time, since the nozzles 12 are provided in multiple numbers and are set at a certain angle, cleaning in multiple directions and areas can be completed at one time, thereby improving the cleaning efficiency.

[0051] See also Figure 3-Figure 5The brush roller assembly used in step S2 includes a single-sided brush roller 21 for cleaning one side of the inner wall and a double-sided brush roller 22 for cleaning both sides of the inner wall at the same time. The specific steps of use are as follows:

[0052] S21, when there is strip steel in the furnace nose, select the single-sided brush roller 21 to clean the inner wall of the furnace nose in sequence. After the inner wall is cleaned, the surface of the strip steel is cleaned;

[0053] S22. When there is no strip steel in the furnace nose, the double-sided brush roller 22 is selected to clean the upper and lower walls of the furnace nose at the same time.

[0054] The single-sided brush roller 21 includes a first telescopic rod 211, a first mounting frame 212 is provided at the end of the first telescopic rod 211, and a single-row brush roller 213 is provided on the first mounting frame 212; the double-sided brush roller 22 includes a second telescopic rod 221, a second mounting frame 222 is provided at the end of the second telescopic rod 221, and a double-row brush roller 223 is provided on the second mounting frame 222.

[0055] In this embodiment, the first telescopic rod 211 and the second telescopic rod 221 have the same structure, and are both connected by multiple connecting rods through threads.

[0056] The bristles on the single-row brush roller 213 and double-row brush roller 223 are made of nylon or metal wire, and are 20-50 mm long. The material of the bristles is determined by the temperature inside the furnace nose: nylon is used at room temperature, while metal is used at high temperatures. Both the single-row brush roller 213 and the double-row brush roller 223 are detachable, making replacement easy.

[0057] Furthermore, the second mounting frame 222 has an H-shaped structure. The second telescopic rod 221 is welded to the middle of the second mounting frame 222. The double-row brush rollers 223 are detachably mounted at the upper and lower ends of the second mounting frame 222. The double-row brush rollers 223 are positioned perpendicular to the second telescopic rod 221. The double-row brush rollers 223 have a maximum height of 360 mm and a width of 200 mm, corresponding to the height of the inner wall of the stove nose. Once inserted into the stove nose, the double-row brush rollers 223 contact the upper and lower inner walls, respectively. This design allows for simultaneous cleaning of the upper and lower walls of the stove nose, improving cleaning efficiency.

[0058] In this embodiment, the first telescopic rod 211 , the first mounting bracket 212 , the second telescopic rod 221 , and the second mounting bracket 222 are all made of stainless steel.

[0059] After using the purge device 10 to clean the inside of the furnace nose, continue to use the brush roller assembly to clean the inside of the furnace nose. First, select the single-sided brush roller 21 or the double-sided brush roller 22 based on whether there is strip steel inside the furnace nose. If there is strip steel inside the furnace nose, select the single-sided brush roller 21. Then, select the brush bristle material based on the problem inside the furnace nose. If the furnace nose is at room temperature, select nylon bristles; if the furnace nose is at high temperature, select metal bristles. Then, by holding the first telescopic rod 1, the single-row brush roller 213 is penetrated into the interior of the furnace nose, and the upper and lower walls of the furnace nose are cleaned in turn. When the inner wall of the furnace nose is cleaned, the metal ash on the surface of the strip steel can be cleaned. If the interior of the furnace nose is empty and there is no strip steel, the double-sided brush roller 22 is selected at this time. Similarly, bristles of different materials are selected according to the temperature inside the furnace nose, and then the second telescopic rod 221 is held to penetrate the double-row brush roller 223 into the interior of the furnace nose, so that the double-row brush roller 223 is respectively against the upper and lower walls of the furnace nose, and then cleaning is carried out to achieve one-time cleaning of the upper and lower walls.

[0060] Based on the disclosure and teachings of the above description, those skilled in the art may also make changes and modifications to the above embodiments. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and modifications and variations of the present invention should also fall within the scope of protection of the claims of the present invention. In addition, although certain specific terms are used in this description, these terms are only for convenience of description and do not constitute any limitation to the present invention.

Claims

1. A method for cleaning the inner wall of a furnace nose, characterized in that: The steps include: S1. After the production line is shut down, the zinc pot under the furnace nose is removed, and a purging device (10) is inserted into the interior from the bottom of the furnace nose. The purging device (10) is turned on, and high-pressure nitrogen is introduced. The purging device (10) is moved and rotated to various positions on the inner wall of the furnace nose, and the metal ash on the inner wall is purged and cleaned by the high-pressure nitrogen. The cleaned metal ash falls from the bottom of the furnace nose until no metal ash falls. S2. Use the brush roller assembly to continue cleaning the inner wall of the furnace nose after blowing to ensure that the dead corners are thoroughly cleaned until no metal ash falls from under the furnace nose.

2. A method for cleaning the inner wall of a furnace nose according to claim 1, characterized in that: The brush roller assembly used in step S2 includes a single-sided brush roller (21) for cleaning one side of the inner wall and a double-sided brush roller (22) for cleaning both sides of the inner wall. The specific steps of use are as follows: S21, when there is a strip steel in the furnace nose, a single-sided brush roller (21) is selected to sequentially clean the inner wall of the furnace nose, and after the inner wall is cleaned, the surface of the strip steel is cleaned; S22. When there is no strip steel in the furnace nose, a double-sided brush roller (22) is selected to clean the upper and lower walls of the furnace nose simultaneously.

3. A method for cleaning the inner wall of a furnace nose according to claim 1, characterized in that: The purging device (10) comprises a long tube (11), one end of the long tube (11) is a connecting portion (111), the connecting portion (111) is connected to an external high-pressure air pump through a hose, the other end of the long tube (11) is a cleaning portion (112), a plurality of nozzles (12) are provided on the cleaning portion (112), and the nozzles (12) surround the cleaning portion (112) and are arranged to be tilted downward.

4. A method for cleaning the inner wall of a furnace nose according to claim 3, characterized in that: Four nozzles (12) are evenly arranged on the cleaning portion (112), and the angle between the nozzles (12) and the long tube (11) is 40°.

5. A method for cleaning the inner wall of a furnace nose according to claim 3, characterized in that: The inner diameter of the long tube (11) is larger than the inner diameter of the nozzle (12).

6. A method for cleaning the inner wall of a furnace nose according to claim 3, characterized in that: The long tube (11) is formed by detachably connecting a plurality of connecting tubes (113), and a sealing ring (114) is provided at the connection of the connecting tubes (113).

7. A method for cleaning the inner wall of a furnace nose according to claim 6, characterized in that: A hand-held portion (115) is provided adjacent to the connecting portion (111), the hand-held portion (115) and the connecting portion (111) are bent at an angle of 10-30 degrees, and an anti-slip pattern (116) is provided on the hand-held portion (115).

8. A method for cleaning the inner wall of a furnace nose according to claim 2, characterized in that: The single-sided brush roller (21) comprises a first telescopic rod (211), a first mounting frame (212) is provided at the end of the first telescopic rod (211), and a single-row brush roller (213) is provided on the first mounting frame (212); the double-sided brush roller (22) comprises a second telescopic rod (221), a second mounting frame (222) is provided at the end of the second telescopic rod (221), and a double-row brush roller (223) is provided on the second mounting frame (222).

9. A method for cleaning the inner wall of a furnace nose according to claim 8, characterized in that: The bristles on the single-row brush roller (213) and the double-row brush roller (223) are made of nylon material or metal steel wire material, and the length of the bristles is 20-50 mm.

10. A method for cleaning the inner wall of a furnace nose according to claim 8, characterized in that: The second mounting frame (222) is in an "H"-shaped structure. The second telescopic rod (221) is welded and fixed to the middle of the second mounting frame (222). The double-row brush rollers (223) are detachably arranged at the upper and lower ends of the second mounting frame (222). The double-row brush rollers (223) and the second telescopic rod (221) are arranged perpendicular to each other. The maximum upper and lower heights of the double-row brush rollers (223) are 360 mm, and the width is 200 mm. The height is set to correspond to the height of the inner wall of the furnace nose. After being inserted into the furnace nose, the double-row brush rollers (223) contact the upper and lower inner walls respectively.

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