Cleaning device for aluminum alloy air cushion type continuous heat treatment furnace

Abstract

The utility model discloses a cleaning device for an aluminum alloy air cushion type continuous heat treatment furnace, which comprises a cleaning shed body, a first water purifying tank, a second water purifying tank, a sewage tank, a plurality of first spraying rods close to an inlet of the cleaning shed body and at least one second spraying rod close to an outlet of the cleaning shed body, clean water stored in the first clean water tank is filtered and heated and then provides cleaning water for the first spraying rod, the second clean water tank supplies water to the second spraying rod, water sprayed by the second spraying rod is output to the sewage tank after cleaning the aluminum plate, and floating particles generated by cleaning the aluminum plate are discharged through a high-position overflow port formed in the sewage tank; and residual cleaning sewage is conveyed to the vacuum belt filter for filtering treatment and then is output to the first water purification tank. The second spraying rod, close to the outlet, of the cleaning shed body is independently supplied with water through the second water purifying tank, generated oil stains, aluminum powder and other floating particles are discharged through a high-position overflow opening of the sewage tank, continuous replacement of cleaning water is achieved, and the cleanliness of the cleaning water is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of air cushion furnace cleaning, in particular to a cleaning device for an aluminum alloy air cushion type continuous heat treatment furnace. Background Art

[0002] The air cushion furnace train is a continuous heat treatment device integrating processes such as cleaning, annealing, straightening, and stretching in the production of strip materials such as aluminum and aluminum alloys.

[0003] The blanks of the air cushion furnace train are directly supplied by cold rolling. The aluminum plates have heavy oil stains and aluminum powder. Coupled with only one Y-type filter designed in the clear water flushing pipeline, the filtering effect is far from achieved, resulting in a large amount of impurities in the water reaching the spray bar. The nozzles will be blocked soon, causing water shortage in the cleaning machine and various defects caused by dry friction between the brush rolls and the aluminum plates.

[0004] Therefore, how to achieve the cleaning of impurities and avoid the blockage of the spray bar is one of the key points of work for those skilled in the art. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a cleaning device for an aluminum alloy air cushion type continuous heat treatment furnace, which ensures the cleanliness of the cleaning water and greatly guarantees the stable operation and continuous production of the cushion furnace.

[0006] To solve the above technical problems, an embodiment of the utility model provides a cleaning device for an aluminum alloy air cushion type continuous heat treatment furnace, including a cleaning shed body, a first clean water tank, a second clean water tank, and a sewage tank. There are multiple first spray bars near the entrance of the cleaning shed body and at least one second spray bar near the exit. The clean water stored in the first clean water tank is filtered and heated to provide cleaning water for the first spray bars. The second clean water tank supplies water to the second spray bar. After the water sprayed by the second spray bar cleans the aluminum plate, it is output to the sewage tank. The floating particles generated during the cleaning of the aluminum plate are discharged through the high-level overflow port provided in the sewage tank, and the remaining cleaning sewage is transported to a vacuum belt filter for filtration treatment and then output to the first clean water tank.

[0007] Among them, it also includes a return pipe connecting the exit of the cleaning shed body and the sewage tank. The cleaning wastewater generated by the second spray bar on the aluminum plate is output to the sewage tank for storage through the return pipe. The floating particles floating in the cleaning wastewater are discharged through the high-level overflow port provided in the sewage tank, and the remaining cleaning sewage is pumped to the vacuum belt filter for filtration treatment and then output to the first clean water tank.

[0008] Further included are a liquid level detector and a trigger disposed in the sewage tank. The liquid level detector is used to detect the liquid level height of the sewage tank. The trigger is connected to the liquid level detector and the sewage pump, and is used to control an increase in the output power of the sewage pump after the liquid level height is higher than the maximum threshold value of the preset liquid level trigger value, or to control a decrease in the output power of the sewage pump after the liquid level height is lower than the minimum threshold value of the preset liquid level trigger value.

[0009] Further included are a clean water lift pump, a stop valve, an electric ball valve, and two manual ball valves disposed between the second spray bar and the second clean water tank. The number of the second spray bars is multiple. The clean water lift pump is used to pump the clean water stored in the second clean water tank to the second spray bar. The stop valve is used to control the on-off state of the clean water pipeline between the second spray bar and the second clean water tank. The electric ball valve is used to control the flow state of the clean water pipeline between the spray pipe group formed by the multiple second spray bars and the second clean water tank. The manual ball valve is used to control the flow state of the clean water pipeline of the second spray bar.

[0010] The first spray bar and the second spray bar are stainless steel corrugated hoses with a length of 1000 mm - 2800 mm or plastic hoses with a length of 2000 mm - 2500 mm. The first spray bar and the second spray bar are provided with 10 - 15 nozzles with a diameter of 2.5 mm - 3.0 mm.

[0011] Further included are a clean water liquid level detector and a clean water replenishment controller disposed in the second clean water tank. The clean water replenishment controller is used to control a clean water replenishment pump to replenish clean water to the second clean water tank after the clean water liquid level detector detects that the liquid level height of the clean water in the second clean water tank is lower than a threshold value.

[0012] Further included is a display connected to the liquid level detector, the trigger, the clean water liquid level detector, and the clean water replenishment controller, which is used to display the liquid level height of the sewage tank detected by the liquid level detector, and to display the preset liquid level trigger value set by the trigger, and to display the liquid level height of the cleaning liquid in the second clean water tank obtained by the clean water liquid level detector. The clean water replenishment controller is used to display the working state of the cleaning liquid replenishment pump and the cleaning liquid replenishment threshold value.

[0013] Further included is a bag filter disposed between the cleaning shed body and the vacuum belt filter, which is used to output the cleaning sewage output from the cleaning shed body to the vacuum belt filter for secondary filtration treatment after preliminary filtration. The bag filter includes a main bag filter and a standby bag filter, and the standby bag filter is a standby filter for the main bag filter.

[0014] Among them, the first spray bar and the second spray bar are self-cleaning integrated spray bars.

[0015] Compared with the prior art, the cleaning device for an aluminum alloy air-cushion continuous heat treatment furnace provided by the embodiment of the present invention has the following advantages:

[0016] For the cleaning device for an aluminum alloy air-cushion continuous heat treatment furnace provided by the embodiment of the present invention, the second spray bar near the outlet of the cleaning shed body is supplied with water by the second clean water tank to clean and intercept the residues of the aluminum plate in the cleaning shed body, ensuring that the surface impurities are completely absorbed by the cleaning machine. The floating particles such as oil stains and aluminum powder are discharged through the high-level overflow port of the sewage tank, realizing the continuous replacement of the cleaning water, ensuring its cleanliness. At the same time, the sewage tank finally returns to the clean water tank to supply liquid to the spray bar. By adding a function of rinsing with clean water, the cleaning water in the system can be continuously replaced to ensure its cleanliness, ensuring the stable operation and continuous production of the air-cushion furnace. Description of the Drawings

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0018] Figure 1 It is a schematic structural diagram of an embodiment of the cleaning device for an aluminum alloy air-cushion continuous heat treatment furnace provided by the present invention;

[0019] Among them, 10 - pre-cleaning working tank, 20 - spray bar group, 30 - clean water storage tank, 31 - clean water pipeline, 41 - return pipe, 40 - sewage tank. Detailed Embodiments

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0021] Please refer to Figure 1 , Figure 1 It is a schematic structural diagram of an embodiment of the cleaning device for an aluminum alloy air-cushion continuous heat treatment furnace provided by the present invention.

[0022] In a specific embodiment, the cleaning device for the aluminum alloy air-cushion continuous heat treatment furnace includes a cleaning shed, a first clean water tank, a second clean water tank, and a sewage tank. The cleaning shed is provided with a plurality of first spray bars near the entrance and at least one second spray bar near the exit. The clean water stored in the first clean water tank is filtered and heated to supply cleaning water to the first spray bars. The second clean water tank supplies water to the second spray bar. After the water sprayed by the second spray bar is used to clean the aluminum plate, it is output to the sewage tank. The floating particles generated during the cleaning of the aluminum plate are discharged through the high-level overflow port provided in the sewage tank, and the remaining cleaning sewage is transported to a vacuum belt filter for filtration and then output to the first clean water tank.

[0023] By using the second clean water tank to supply water to the second spray bar near the exit of the cleaning shed, the residues on the aluminum plate in the cleaning shed are cleaned and intercepted, ensuring that surface impurities are completely absorbed by the cleaning machine. The floating particles such as oil stains and aluminum powder generated are discharged through the high-level overflow port of the sewage tank, realizing the continuous replacement of the cleaning water and ensuring its cleanliness. At the same time, the sewage tank finally returns to the clean water tank to supply liquid to the spray bar. By adding a clean water flushing function, the cleaning water in the system can be continuously replaced to ensure its cleanliness and guarantee the stable operation and continuous production of the air-cushion furnace.

[0024] Since the water generated in the sewage tank is filtered by a sewage vacuum belt filter and then output to the first clean water tank, the recycling of water resources is realized, and the specific operation process is not limited.

[0025] In one embodiment, the cleaning device for the aluminum alloy air-cushion continuous heat treatment furnace further includes a return pipe connecting the exit of the cleaning shed and the sewage tank. The cleaning wastewater generated by the second spray bar of the cleaning device for the aluminum alloy air-cushion continuous heat treatment furnace on the aluminum plate is output to the sewage tank for storage through the return pipe. The floating particles floating in the cleaning wastewater are discharged through the high-level overflow port provided in the sewage tank, and the remaining cleaning sewage is pumped to the vacuum belt filter by a sewage pump for filtration and then output to the first clean water tank.

[0026] By setting the return pipe and pumping the remaining cleaning sewage to the vacuum belt filter by a sewage pump for filtration and then output to the first clean water tank, parameters such as space and distance can be ignored, which increases the difficulty of setting the position of the first clean water tank.

[0027] By connecting a reflux pipe and a sewage tank at the outlet of the cleaning shed body, storing the sewage generated by flushing in the sewage tank first, and then outputting it to a vacuum belt filter for filtration treatment, it is possible to output the sewage to the sewage tank first for sedimentation for a certain period of time, reduce the kinetic energy of the sewage itself, reduce the possibility of solid impurities being output to the vacuum belt filter subsequently, reduce the subsequent filtration pressure, and improve the operation reliability of the cleaning system and the operation stability and continuity of related equipment.

[0028] In this application, the types of the reflux pipe and the sewage pump are not limited.

[0029] Since the upstream cleaning process is not continuous, that is, the flow rate of the wastewater generated by cleaning is not stable, and even if the flow rate of the upstream wastewater is fixed, due to different processes, the flow rate of clean water required for subsequent cleaning is different, resulting in different filtration pressures downstream.

[0030] In order to reduce the downstream filtration effect, improve its operation efficiency, and reduce the operation pressure, in one embodiment, the cleaning device for the aluminum alloy air-cushioned continuous heat treatment furnace further includes a liquid level detector and a trigger arranged in the sewage tank. The liquid level detector is used to detect the liquid level height of the sewage tank, and the trigger is connected to the liquid level detector and the sewage pump, and is used to control the increase of the output power of the sewage pump after the liquid level height is higher than the maximum threshold of the preset liquid level trigger value, or control the reduction of the output power of the sewage pump after the liquid level height is lower than the minimum threshold of the preset liquid level trigger value.

[0031] By detecting the current liquid level height of the sewage tank through the liquid level detector, according to the relationship between its liquid level height and the preset threshold value, when the liquid level height is too large, appropriately increase the output power of the sewage pump to increase the output flow rate of the sewage, avoid the situation that the sewage overflows automatically when stored in the sewage tank, and at the same time, when the liquid level is too low, automatically reduce the output power of the sewage pump to reduce the output flow rate of the sewage, avoid the situation that the sewage pump pumps the bottom sediment, and improve the operation reliability of the equipment.

[0032] In this application, the type of the liquid level detector and the threshold range of the trigger are not limited.

[0033] This application uses clean water for flushing operations, and other types of cleaning fluids can also be used, such as organic solution, etc. Moreover, the clean water can be ordinary clean water or special clean water, such as deionized water, etc. This application includes but is not limited to using clean water for flushing operations.

[0034] In order to further improve the convenience of use during the flushing process and enhance the efficiency of cleaning, in one implementation, the cleaning device for the aluminum alloy air-cushioned continuous heat treatment furnace further includes a clean water lift pump, a stop valve, an electric ball valve, and two manual ball valves disposed between the second spray bar and the second clean water tank. The number of the second spray bars is multiple. The clean water lift pump is used to pump the clean water stored in the second clean water tank to the second spray bar. The stop valve is used to control the on-off state of the clean water pipeline between the second spray bar and the second clean water tank. The electric ball valve is used to control the flow state of the clean water pipeline between the spray pipe group formed by the multiple second spray bars and the second clean water tank. The manual ball valve is used to control the flow state of the clean water pipeline of the second spray bar.

[0035] By using a cleaning liquid lift pump to transport clean water, clean water cleaning without being restricted by position and height can be achieved. Moreover, the output flow rate of clean water can be controlled by the power of the controller to meet different flushing requirements. Through the setting of the stop valve, the on-off of the relevant pipeline can be realized, avoiding continuous output and improving the utilization efficiency of clean water. Through the flow control by the electric ball valve and the manual ball valve, users can select an appropriate clean water outflow speed according to needs to meet different cleaning requirements.

[0036] This application includes but is not limited to setting the above-mentioned cleaning liquid lift pump, stop valve, electric ball valve, and two manual ball valves for the transportation control of clean water.

[0037] In this application, a spray bar is used for transporting clean water, and no limitations are imposed on its structure, material, size, etc. The first spray bar and the second spray bar are stainless steel bellows with a length of 1000 mm - 2800 mm or plastic hoses with a length of 2000 mm - 2500 mm. The first spray bar and the second spray bar are provided with 10 - 15 nozzles with a diameter of 2.5 mm - 3.0 mm, or other materials of conveying pipelines can be used.

[0038] In one embodiment, the lengths of the first spray bar and the second spray bar are 2800 mm, and each spray bar is provided with 14 nozzles with a diameter of 2.8 mm.

[0039] This application does not impose any limitations on the lengths, materials of the first spray bar and the second spray bar, as well as the number and size of the nozzles provided.

[0040] To further achieve the continuity of flushing, in one embodiment, the cleaning device for the aluminum alloy air-cushioned continuous heat treatment furnace further includes a clean water level detector and a clean water replenishment controller disposed in the second clean water tank. The clean water replenishment controller is configured to control a clean water replenishment pump to replenish clean water to the second clean water tank after the clean water level detector detects that the liquid level height of the clean water in the second clean water tank is lower than a threshold value.

[0041] Through the clean water level detector and the clean water replenishment controller, after the clean water level detector detects that the liquid level height of the clean water in the second clean water tank is lower than the threshold value, the clean water replenishment pump is controlled to replenish clean water to the second clean water tank, ensuring that the clean water stored in the clean water storage tank 30 always maintains a predetermined volume, enabling efficient flushing work to be maintained and ensuring the stable operation and continuous production of the air-cushioned furnace.

[0042] Furthermore, to improve management efficiency, in one embodiment, the cleaning device for the aluminum alloy air-cushioned continuous heat treatment furnace further includes a display connected to the liquid level detector, the trigger, the clean water level detector, and the clean water replenishment controller, for displaying the liquid level height of the sewage tank detected by the liquid level detector, and displaying the preset liquid level trigger value set by the trigger, and displaying the liquid level height of the cleaning liquid in the cleaning liquid storage tank obtained by the clean water level detector. The clean water replenishment controller is configured to display the working state of the cleaning liquid replenishment pump and the cleaning liquid replenishment threshold.

[0043] By means of the display, the operating parameters and set parameters of relevant equipment are displayed, enabling the real-time acquisition of the state parameters of equipment operation and improving the management efficiency.

[0044] This application does not limit the display method of the display and the structure of the display, etc.

[0045] To further reduce the filtration pressure of the vacuum belt filter, in one embodiment, the cleaning device for the aluminum alloy air-cushioned continuous heat treatment furnace further includes a bag filter disposed between the cleaning shed body and the vacuum belt filter, for preliminarily filtering the cleaning sewage output from the cleaning shed body and then outputting it to the vacuum belt filter for filtration treatment. The bag filter includes a main bag filter or a standby bag filter, and the standby bag filter is a standby filter for the main bag filter.

[0046] By setting the bag filter, after the cleaning shed body is cleaned, larger particles are pre-removed and filtered, reducing the blockage pressure of the spray rod and nozzle, reducing the filtration pressure of the vacuum belt filter, and ensuring the operation reliability of the equipment.

[0047] This application includes, but is not limited to, pre-filtering using bag filters, and also includes using other filter structures. The number of spare bag filters is not limited.

[0048] Even after the above improvements, a small amount of aluminum powder and impurities still reach the spray bars, reducing the possibility of their normal operation. To reduce the time for shutting down the machine to clean the nozzles, reduce the labor intensity of employees, and lower the safety risk, in one embodiment, the first spray bar and the second spray bar are self-cleaning integrated spray bars. These spray bars can be cleaned and drained by simply rotating on the operation side, and the discharged sewage can be discharged or collected at a designated location. The cleaning operation of a group of spray bars can be quickly completed, improving the maintenance efficiency.

[0049] This application does not limit the specific structures of the first spray bar and the second spray bar.

[0050] In one embodiment, for the cleaning device of the aluminum alloy air-cushioned continuous heat treatment furnace, the last one or two groups of spray bars in the pre-cleaning machine train are changed to be rinsed with clean water; a new clean water storage tank is added, and pipes are laid to the last two groups of spray bars in the pre-cleaning. Two clean water lift pumps (flow rate 6 m³ / h), two manual stop valves (DN50), one electric ball valve (DN50), one electric control valve (DN50), four manual ball valves (DN25), and two stainless steel bellows (length 1500 mm) need to be purchased. After on-site installation, the clean water lift pumps, electric ball valve, and electric control valve are connected to the secondary control system to achieve remote automatic control.

[0051] Two sets of bag filters (one in use and one as a spare) are added after the pre-cleaning water supply pump to reduce impurities from entering the heat exchanger and the inside of the nozzles, reducing nozzle blockage and the frequent slow heating of the heat exchanger.

[0052] Since a small amount of aluminum powder and impurities may still reach the spray bars, to reduce the time for shutting down the machine to clean the nozzles, reduce the labor intensity of employees, and lower the safety risk, self-cleaning integrated spray bars are used. These spray bars can be cleaned and drained by simply rotating on the operation side, and the discharged sewage can be discharged or collected at a designated location. The cleaning operation of a group of spray bars can be completed in less than one minute.

[0053] The above technical solutions have the following beneficial effects:

[0054] 1. The control process is simple and convenient;

[0055] 2. Frequent cleaning of nozzles, water washing, and heat exchangers is avoided;

[0056] 3. The quality of the plates at the outlet of the cleaning machine is improved;

[0057] 4. Wear and replacement frequency of subsequent rubber rollers are reduced.

[0058] In summary, for the cleaning device for the aluminum alloy air-cushioned continuous heat treatment furnace provided by the embodiment of the present utility model, the second spray rod near the outlet of the cleaning shed body is supplied with water by the second clean water tank to clean and intercept the residues of the aluminum plate in the cleaning shed body, ensuring that the surface impurities are thoroughly absorbed by the cleaning machine. The floating particles such as oil stains and aluminum powder generated are discharged through the high-level overflow port of the sewage tank, realizing the continuous replacement of the cleaning water, ensuring its cleanliness. At the same time, the sewage tank finally returns to the clean water tank to supply liquid to the spray rod. By adding the function of rinsing with clean water, the cleaning water in the system can be continuously replaced to ensure its cleanliness, and the stable operation and continuous production of the air-cushioned furnace are guaranteed.

[0059] The cleaning device for the aluminum alloy air-cushioned continuous heat treatment furnace provided by the present utility model has been introduced in detail above. Specific examples are used in this article to elaborate on the principle and implementation manner of the present utility model. The description of the above embodiments is only used to help understand the method and its core idea of the present utility model. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of the present utility model, several improvements and modifications can still be made to the present utility model, and these improvements and modifications also fall within the protection scope of the claims of the present utility model.

Claims

1. A cleaning device for an aluminum alloy air cushion continuous heat treatment furnace, characterized in that: The cleaning shed comprises a cleaning shed body, a first clean water tank, a second clean water tank and a sewage tank. The cleaning shed body comprises a plurality of first spray rods near the inlet and at least one second spray rod near the outlet. The clean water stored in the first clean water tank is filtered and heated to provide cleaning water to the first spray rod. The second clean water tank supplies water to the second spray rod. The water sprayed by the second spray rod is output to the sewage tank after cleaning the aluminum plate. The floating particles generated by cleaning the aluminum plate are discharged through a high overflow port arranged in the sewage tank. The remaining cleaning sewage is transported to a vacuum belt filter for filtration and then output to the first clean water tank.

2. The cleaning device for an aluminum alloy air cushion continuous heat treatment furnace according to claim 1, characterized in that: It also includes a return pipe connected to the outlet of the cleaning shed and the sewage tank. The cleaning wastewater generated by the second spray rod on the aluminum plate is output to the sewage tank for storage through the return pipe. The floating particles floating in the cleaning wastewater are discharged through the high-level overflow port set in the sewage tank. The remaining cleaning wastewater is pumped to the vacuum belt filter through a sewage pump for filtration and then output to the first clean water tank.

3. The cleaning device for an aluminum alloy air cushion continuous heat treatment furnace according to claim 2, characterized in that: It also includes a liquid level detector and a trigger arranged in the sewage tank, the liquid level detector is used to detect the liquid level height of the sewage tank, and the trigger is connected to the liquid level detector and the sewage pump, and is used to control the increase of the output power of the sewage pump after the liquid level height is higher than the maximum threshold of the liquid level trigger value according to the liquid level height and a preset liquid level trigger value, or to control the reduction of the output power of the sewage pump after the liquid level height is lower than the minimum threshold of the liquid level trigger value.

4. The cleaning device for an aluminum alloy air cushion continuous heat treatment furnace as claimed in claim 3, characterized in that: It also includes a clean water lifting pump, a stop valve, an electric ball valve, and two manual ball valves arranged between the second spray rod and the second clean water tank. There are multiple second spray rods. The clean water lifting pump is used to pump the clean water stored in the second clean water tank to the second spray rod. The stop valve is used to control the on-off state of the clean water pipeline between the second spray rod and the second clean water tank. The electric ball valve is used to control the flow state of the clean water pipeline between the spray pipe group formed by multiple second spray rods and the second clean water tank. The manual ball valve is used to control the flow state of the clean water pipeline of the second spray rod.

5. The cleaning device for an aluminum alloy air cushion continuous heat treatment furnace as claimed in claim 4, characterized in that: The first spray rod and the second spray rod are stainless steel corrugated pipes with a length of 1000mm-2800mm or plastic hoses with a length of 2000mm-2500mm. The first spray rod and the second spray rod are provided with 10-15 nozzles with a diameter of 2.5mm-3.0mm.

6. The cleaning device for an aluminum alloy air cushion continuous heat treatment furnace as claimed in claim 5, characterized in that: It also includes a clean water level detector and a clean water replenishment controller arranged in the second clean water tank. The clean water replenishment controller is used to control the clean water replenishment pump to replenish clean water to the second clean water tank after the clean water level detector detects that the clean water level height of the second clean water tank is lower than a threshold value.

7. The cleaning device for an aluminum alloy air cushion continuous heat treatment furnace as claimed in claim 6, characterized in that: It also includes a display connected to the liquid level detector, the trigger, the clean water level detector, and the clean water replenishment controller, which is used to display the liquid level height of the sewage tank detected by the liquid level detector, and the preset liquid level trigger value set by the trigger, and the liquid level height of the cleaning liquid in the second clean water tank obtained by the clean water level detector. The clean water replenishment controller is used to display the working status of the cleaning liquid replenishment pump and the cleaning liquid replenishment threshold.

8. The cleaning device for an aluminum alloy air cushion continuous heat treatment furnace according to any one of claims 1 to 7, characterized in that: It also includes a bag filter arranged between the cleaning shed and the vacuum belt filter, which is used to output the cleaning wastewater output from the cleaning shed to the vacuum belt filter for secondary filtration after preliminary filtration. The bag filter includes a main bag filter and a spare bag filter. The spare bag filter is a spare filter for the main bag filter.

9. The cleaning device for an aluminum alloy air cushion continuous heat treatment furnace as claimed in claim 8, characterized in that: The first spray rod and the second spray rod are self-cleaning integrated spray rods.

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