Aluminum spraying waste gas collecting and treating device

Abstract

The invention discloses an aluminum spraying waste gas collecting and treating device which comprises a spraying tower tank body and a settling pond, a gas inlet pipeline is connected to the lower portion of one side of the spraying tower tank body, and a water drainage pipeline, a first water inlet pipeline, a second water inlet pipeline and a third water inlet pipeline are sequentially connected to the other side of the spraying tower tank body from bottom to top; the top of the spray tower tank body is connected with an exhaust pipeline, and an anti-explosion cyclone dust removal device is mounted on the air inlet pipeline. Through the arrangement of the anti-explosion cyclone dust removal equipment, the aluminum spraying waste gas collection and treatment device has the effect of avoiding hydrogen explosion in the tank body, and through the cooperative arrangement of the nozzle, the turbulator, the filter screen and the layer ball cage, the aluminum spraying waste gas collection and treatment device has the effects of uniform gas flow distribution in the tank body and good dust removal effect; and through cooperative arrangement of a water return pipe, a water return electric ball valve, a flushing electric ball valve and a tap water electric ball valve, the aluminum spraying waste gas collecting and treating device has a self-cleaning effect.

Description

Technical Field

[0001] The invention relates to the technical field of dust removal devices, and in particular to a device for collecting and treating aluminum spraying waste gas. Background Art

[0002] In recent years, with the development of industry, industrial waste gas emitted by various production enterprises has become an important source of air pollutants. If a large amount of industrial waste gas is discharged into the atmosphere without being treated and meeting the standards, it will inevitably reduce the quality of the atmospheric environment, bring serious harm to human health, and cause huge losses to the national economy. Among them, the problem of non-standard emission and collection of aluminum spraying waste gas is particularly serious. Although the existing spraying equipment on the market can filter some aluminum dust, there are the following problems in the filtering process: 1. Aluminum dust generates hydrogen and emits heat when it meets water. Hydrogen is prone to explosion in a confined space, which is extremely dangerous. 2. When the exhaust gas enters the spray tower and is sucked upward, the uneven airflow will cause uneven dust distribution, which will then lead to uneven mixing and uneven blocking of the filter. Finally, the ventilation resistance of the filter is different, causing the weak ventilation part to be quickly blocked, which ultimately leads to poor dust removal effect. 3. Aluminum dust has extremely strong adsorption capacity and is easy to clog the filter and demister when it comes into contact with water, resulting in a large amount of manpower being required to frequently enter the spray equipment to clean the clogged parts. Summary of the invention

[0003] 1. Technical issues to be resolved In view of the shortcomings of the prior art, the present invention provides an aluminum spraying waste gas collection and treatment device, which has the advantages of avoiding hydrogen explosion in the tank, uniform airflow distribution in the tank to achieve good dust removal effect and self-cleaning, and solves the problems of explosion safety hazards, uneven airflow distribution, and the need for workers to frequently enter the tank for cleaning.

[0004] (II) Technical solution In order to achieve the above-mentioned purpose of avoiding hydrogen explosion in the tank body, uniform airflow distribution in the tank body to achieve good dust removal effect and self-cleaning, the present invention provides the following technical solutions: an aluminum spraying waste gas collection and treatment device, including a spray tower tank body and a sedimentation tank, an air intake pipe is connected to the lower part of one side of the spray tower tank body, and the other side of the spray tower tank body is connected to a drainage pipe, a first water inlet pipe, a second water inlet pipe and a third water inlet pipe in sequence from bottom to top, an exhaust pipe is connected to the top of the spray tower tank body, an explosion-proof cyclone dust removal device is installed on the air intake pipe, and the inner ports of the first water inlet pipe, the second water inlet pipe and the third water inlet pipe are respectively connected to a first layer of nozzles, a second layer of nozzles and a third layer of nozzles fixed to the inner wall of the spray tower tank body, and a turbulator, a first layer of filter fixed to the inner wall of the spray tower tank body are installed in sequence from bottom to top between the air intake pipe and the first layer of nozzles. A net and a first layer of ball cages are provided, a second layer of filter net and a second layer of ball cages are fixedly installed on the inner wall of the spray tower tank body near the first layer of nozzles from bottom to top, a third layer of filter net, a third layer of ball cages and a demister are installed in sequence from bottom to top between the second layer of nozzles and the third layer of nozzles, the outer ports of the first water inlet pipe, the second water inlet pipe and the third water inlet pipe are connected with a return pipe whose lower end is inserted into the sedimentation tank, a centrifuge and a water pump are installed on the return pipe near the lower end of the sedimentation tank, a return water electric ball valve is installed on the return pipe between the water pump and the third water inlet pipe, a flushing electric ball valve is installed on the return pipe between the second water inlet pipe and the third water inlet pipe, a tap water pipe is connected to the return pipe on one side of the return water electric ball valve and the flushing electric ball valve, a tap water electric ball valve is installed on the tap water pipe, and an exhaust fan is installed on the exhaust pipe.

[0005] Preferably, the explosion-proof cyclone dust removal equipment can separate most of the aluminum powder in the exhaust gas from the gas through the centrifugal force generated by rotation to reduce the dust removal pressure of the spray tower tank and improve the dust removal effect. The centrifuge can further separate the sewage into slag and water to make the circulating water cleaner.

[0006] Preferably, the turbulator can make the passing exhaust gas turbulent and diffuse upward evenly, which can increase the contact area and thus increase the contact opportunity between the exhaust gas and water to promote the reaction and improve the dust reduction efficiency. The demister can block the water vapor from descending to prevent the water from being lost and discharged into the atmosphere.

[0007] Preferably, the inner port of the drainage pipe is arranged near the bottom of the spray tower tank, and the outer port of the drainage pipe is arranged above the sedimentation tank, so that the sewage inside the spray tower tank can be discharged into the sedimentation tank in time by gravity.

[0008] Preferably, the aluminum spraying waste gas is discharged from the air intake pipe into the spray tower tank body after dust removal by explosion-proof cyclone dust removal equipment. The installation height of the air intake pipe is higher than the installation height of the drainage pipe to avoid being blocked by sewage in the spray tower tank body.

[0009] Preferably, all nozzles, filters, ball cages, turbulators and demisters are installed horizontally and cover the entire cross-section of the spray tower tank as much as possible, so that all exhaust gases need to pass through them when flowing upward.

[0010] Preferably, the first, second and third layers of filters and ball cages are installed closely together, and the first layer nozzle and the second layer nozzle are set at a certain distance from the filter mesh and ball cage below so that the spray sprayed downwards has enough space to spread and achieve better contact with the exhaust gas.

[0011] Preferably, when treating waste gas, the return water electric ball valve is opened, the exhaust fan is turned on, the flushing electric ball valve and the tap water electric ball valve are both closed, and then the water pump draws the clean water after sedimentation in the sedimentation tank upwards to the first layer nozzle and the second layer nozzle and sprays it downward into the spray tower tank body to knock down the dust in the waste gas.

[0012] Preferably, when performing flushing operations, the return water electric ball valve is closed, the exhaust fan is turned off, the flushing electric ball valve and the tap water electric ball valve are both opened, and then tap water is simultaneously poured into the first layer nozzle, the second layer nozzle and the third layer nozzle and sprayed downward to clean the inside of the spray tower tank.

[0013] Compared with the prior art, the present invention provides a device for collecting and treating aluminum spraying waste gas, which has the following beneficial effects: 1. The aluminum spraying waste gas collection and treatment device, through the setting of explosion-proof cyclone dust removal equipment, has the effect of avoiding hydrogen explosion in the tank body. Before using the spray tower to treat the waste gas, the waste gas is pre-treated by the explosion-proof cyclone dust removal equipment, so that the aluminum powder concentration is not so high when the waste gas enters the spray tower, and the concentration of hydrogen in the spray tower tank body can be greatly reduced to avoid hydrogen explosion in the tank body.

[0014] 2. The aluminum spraying waste gas collection and treatment device has the effects of uniform airflow distribution in the tank body and good dust removal effect through the coordinated arrangement of nozzles, turbulators, filters and layer ball cages. The turbulators installed under the tank body fully mix the newly entered waste gas and disperse it evenly upwards, and then the waste gas is evenly sprayed layer by layer through multiple layers of horizontal nozzles, turbulators and filters to improve the dust removal effect.

[0015] 3. The aluminum spraying waste gas collection and treatment device has a self-cleaning effect through the coordinated arrangement of the return pipe, the return electric ball valve, the flushing electric ball valve and the tap water electric ball valve. By switching the open states of the return electric ball valve, the flushing electric ball valve and the tap water electric ball valve above the return pipe, all the nozzles in the spray tower tank can be connected to the tap water, and then the inside of the tank can be cleaned by tap water, so there is no need for workers to frequently drill into the tank for manual cleaning. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of the aluminum spraying waste gas collection and treatment device proposed in the present invention;.

[0017] In the figure: 1. Spray tower tank; 2. Sedimentation tank; 3. Air inlet pipe; 4. Drainage pipe; 5. First water inlet pipe; 6. Second water inlet pipe; 7. Third water inlet pipe; 8. Exhaust pipe; 9. Explosion-proof cyclone dust removal equipment; 10. First layer nozzle; 11. Second layer nozzle; 12. Third layer nozzle; 13. Turbulator; 14. First layer filter; 15. First layer ball cage; 16. Second layer filter; 17. Second layer ball cage; 18. Third layer filter; 19. Third layer ball cage; 20. demister; 21. Return pipe; 22. Centrifuge; 23. Water pump; 24. Return water electric ball valve; 25. Flushing electric ball valve; 26. Tap water pipe; 27. Tap water electric ball valve; 28. Exhaust fan. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] See also Figure 1, a device for collecting and treating aluminum spraying waste gas, comprising a spray tower tank body 1 and a sedimentation tank 2, the spray tower tank body 1 is vertically fixed on the side of the sedimentation tank 2, the sedimentation tank 2 can separate suspended solid particles and liquid in the wastewater to realize water resource reuse, an air intake pipe 3 is connected to the lower part of one side of the spray tower tank body 1, the air intake pipe 3 is connected to the waste gas outlet of the aluminum spraying equipment, the other side of the spray tower tank body 1 is connected to a drainage pipe 4, a first water inlet pipe 5, a second water inlet pipe 6 and a third water inlet pipe 7 in sequence from bottom to top, the inner port of the drainage pipe 4 is arranged at a position close to the bottom surface of the spray tower tank body 1, and the outer port of the drainage pipe 4 is arranged above the sedimentation tank 2, the sewage inside the spray tower tank body 1 can be discharged into the sedimentation tank 2 in time by the action of gravity, the spray tower tank The top of the spray tower body 1 is connected with an exhaust pipe 8, and an explosion-proof cyclone dust removal device 9 is installed on the air intake pipe 3. The explosion-proof cyclone dust removal device 9 can separate most of the aluminum powder in the exhaust gas from the gas through the centrifugal force generated by rotation to reduce the dust removal pressure of the spray tower tank body 1 and improve the dust removal effect. The aluminum spraying exhaust gas is discharged into the spray tower tank body 1 after dust removal through the explosion-proof cyclone dust removal device 9 from the air intake pipe 3. The installation height of the air intake pipe 3 is higher than the installation height of the drainage pipe 4 to avoid being blocked by the sewage in the spray tower tank body 1. The inner ports of the first water inlet pipe 5, the second water inlet pipe 6 and the third water inlet pipe 7 are respectively connected to the first layer nozzle 10, the second layer nozzle 11 and the third layer nozzle 12 fixed to the inner wall of the spray tower tank body 1. The air intake pipe 3 and the first layer nozzle 1 0 are sequentially installed from bottom to top with a turbulator 13, a first layer of filter screen 14 and a first layer of ball cage 15 fixed to the inner wall of the spray tower tank body 1. The turbulator 13 can make the passing exhaust gas produce turbulence and diffuse upward evenly, which can increase the contact area and thus increase the contact opportunity between the exhaust gas and water to promote the reaction and improve the dust reduction efficiency. The inner wall of the spray tower tank body 1 above the first layer of nozzles 10 is sequentially fixed from bottom to top with a second layer of filter screen 16 and a second layer of ball cage 17. Between the second layer of nozzles 11 and the third layer of nozzles 12, a third layer of filter screen 18, a third layer of ball cage 19 and a demister 20 fixed to the inner wall of the spray tower tank body 1 are sequentially installed from bottom to top. The demister 20 can block the water vapor from falling to prevent the water from being lost and discharged into the atmosphere. The first water inlet pipe The outer ports of the water inlet pipe 5, the second water inlet pipe 6 and the third water inlet pipe 7 are connected with a return pipe 21 whose lower end is inserted into the sedimentation tank 2. The return pipe 21 is only inserted into the liquid surface for a short distance to ensure that clean water is extracted. A centrifuge 22 and a water pump 23 are installed at the lower end of the return pipe 21 near the sedimentation tank 2. The centrifuge 22 can further separate the slag and water of the sewage to make the circulating water cleaner. The return pipe 21 is located between the water pump 23 and the third water inlet pipe 7 and is installed with a return water electric ball valve 24. The return pipe 21 is located between the second water inlet pipe 6 and the third water inlet pipe 7 and is installed with a flushing electric ball valve 25. The return pipe 21 is located on one side of the return water electric ball valve 24 and the flushing electric ball valve 25 and is connected with a tap water pipe 26. A tap water electric ball valve 27 is installed on the tap water pipe 26.An exhaust fan 28 is installed on the exhaust duct 8. All nozzles, filters, ball cages, turbulators 13 and demisters 20 are installed horizontally and cover the entire cross-section of the spray tower tank body 1 as much as possible, so that all exhaust gases need to pass through them when flowing upward. The filters and ball cages of the first, second and third layers are installed closely together. The first layer nozzle 10 and the second layer nozzle 11 are set at a certain distance from the filter and ball cage below so that the spray sprayed downward has enough space to spread and achieve better contact with the exhaust gas. When the exhaust gas is treated, the return water electric ball valve 24 is opened, the exhaust fan 28 is opened, and the electric ball valve is flushed. The valve 25 and the tap water electric ball valve 27 are both closed, and then the water pump 23 pumps the clean water after sedimentation in the sedimentation tank 2 upward to the first layer nozzle 10 and the second layer nozzle 11 and sprays it downward into the spray tower tank body 1 to knock down the dust in the exhaust gas. When performing the flushing operation, the return water electric ball valve 24 is closed, the exhaust fan 28 is closed, the flushing electric ball valve 25 and the tap water electric ball valve 27 are both opened, and then the tap water is simultaneously poured into the first layer nozzle 10, the second layer nozzle 11 and the third layer nozzle 12 and sprayed downward to clean the inside of the spray tower tank body 1. Regular cleaning of the spray tower can reduce blockage and thus reduce the cost of manual cleaning.

[0020] When in use, the exhaust gas containing a large amount of aluminum powder generated by the aluminum spraying equipment is connected to the spray tower tank body 1 through the air intake pipe 3. The exhaust gas in the air intake pipe 3 is initially dusted by the explosion-proof cyclone dust removal equipment 9 under the suction force of the exhaust fan 28 and the thrust of the aluminum spraying equipment itself, and then enters the spray tower tank body 1, wherein the explosion-proof cyclone dust removal equipment 9 can remove 90% of the aluminum dust and nitrate dust, and the explosion-proof cyclone dust removal equipment 9 can recycle the dust for waste recycling, and at the same time reduce the dust concentration of the exhaust gas entering the spray tower tank body 1 by 90%, thereby greatly reducing the hydrogen generated by the reaction of aluminum powder and water, so that the hydrogen concentration in the spray tower tank body 1 does not reach the explosion concentration, thereby greatly improving the safety effect. At the same time, the reduction in aluminum powder concentration can greatly reduce the amount of aluminum powder clogging the filter screen. The backwashing can have a significant effect, which can greatly reduce the number of times the spray filter is blocked, thereby reducing the cost of manual cleaning. The explosion-proof cyclone dust removal equipment 9 itself carries an explosion-proof valve with an explosion-proof function. The treated exhaust gas enters the bottom of the spray tower tank 1 from the air inlet pipe 3, and then the exhaust gas rises into the turbulator 13 under the extraction action of the exhaust fan 28. After being evenly diverted by the turbulator 13, it rises and passes through the first layer of filter 14 to be filtered and blocked by the first layer of ball cage 15. The dust rises and adheres to this layer of ball cage. Then the first layer of ball cage 15 is sprayed with water by the first layer of nozzle 10. The dust merges with the water and falls. Some of the untreated exhaust gas enters the second layer of filter and the second layer of ball cage. The dust rises and adheres to this layer of ball cage. Then the second After the layer of ball cages is sprayed with water by the second layer nozzle 11, the dust merges with the water and falls, and then a trace amount of gas enters the third layer filter and the third layer ball cage 19, blocking the dust from rising and adhering the dust to this layer of spheres. At this time, the gas and water vapor rise and enter the demister 20 under the action of the exhaust fan 28. The demister 20 blocks the water vapor from falling to prevent water loss and discharge into the atmosphere. The defogged gas is discharged into the atmosphere through the fan, and then backwashing is performed every two days. During backwashing, tap water can clean the dust accumulated in the third layer ball cage 19 and the blocked filter below. Since the concentration of aluminum powder entering the spray tower tank body 1 has been greatly reduced, not much dust is knocked down by water in the spray tower tank body 1, and the filter will not be washed away all at once during use. Blockage, and then timely backwashing can greatly reduce blockage. The wastewater generated after the exhaust gas is sprayed is discharged from the drainage pipe 4 to the sedimentation tank 2. After the sewage is precipitated in the sedimentation tank 2, the upper clean water is pumped from the return pipe 21 to the spray tower tank 1 by the water pump 23 for reuse. In this process, the centrifuge 22 will separate the clean water pumped up by the water pump 23 from the slag water again, so that the water entering the cycle is cleaner to avoid nozzle blockage. When treating the exhaust gas, the return water electric ball valve 24 is opened, the exhaust fan 28 is opened, the flushing electric ball valve 25 and the tap water electric ball valve 27 are closed, and then the water pump 23 pumps the clean water after precipitation in the sedimentation tank 2 to the first layer nozzle 10 and the second layer nozzle 11 and sprays it downward into the spray tower tank 1 to knock down the dust in the exhaust gas.During the flushing operation, the return water electric ball valve 24 is closed, the exhaust fan 28 is turned off, the flushing electric ball valve 25 and the tap water electric ball valve 27 are both opened, and then tap water is simultaneously poured into the first layer nozzle 10, the second layer nozzle 11 and the third layer nozzle 12 and sprayed downward to clean the inside of the spray tower tank body 1. The flushing time is 10 minutes, and the flushing can also replenish the water level drop caused by water loss.

[0021] To sum up, the aluminum spraying waste gas collection and treatment device pre-treats the waste gas through the explosion-proof cyclone dust removal equipment 9 before using the spray tower to treat the waste gas, so that the aluminum powder concentration of the waste gas is not so high when entering the spray tower, thereby greatly reducing the concentration of hydrogen in the spray tower tank body 1 to avoid hydrogen explosion in the tank body, and the turbulator 13 installed under the tank body is used to fully mix the newly entered waste gas so that it is evenly dispersed upward, and then the waste gas is evenly sprayed layer by layer through multiple layers of horizontal nozzles, turbulators 13 and filters to improve the dust removal effect, and by switching the return water electric ball valve 24, the flushing electric ball valve 25 and the tap water electric ball valve 27 above the return water pipe 21 to the open state, all the nozzles in the spray tower tank body 1 can be connected to tap water, and then the inside of the tank body can be cleaned by tap water, so there is no need for workers to frequently drill into the tank body for manual cleaning.

[0022] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "comprise one" do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0023] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for collecting and treating aluminum spraying waste gas, comprising a spray tower tank (1) and a sedimentation tank (2), characterized in that: An air intake pipe (3) is connected to the lower part of one side of the spray tower tank body (1); a drainage pipe (4), a first water intake pipe (5), a second water intake pipe (6) and a third water intake pipe (7) are connected to the other side of the spray tower tank body (1) in order from bottom to top; an exhaust pipe (8) is connected to the top of the spray tower tank body (1); an explosion-proof cyclone dust removal device (9) is installed on the air intake pipe (3); and the inner ports of the first water intake pipe (5), the second water intake pipe (6) and the third water intake pipe (7) are respectively connected to A first layer of nozzles (10), a second layer of nozzles (11) and a third layer of nozzles (12) are fixed to the inner wall of the spray tower tank body (1); a turbulator (13), a first layer of filter screen (14) and a first layer of ball cage (15) are installed in sequence from bottom to top between the air inlet pipe (3) and the first layer of nozzles (10); a second layer of filter screen (16) and a second layer of ball cage (17) are fixedly installed in sequence from bottom to top on the inner wall of the spray tower tank body (1) above the first layer of nozzles (10). ), a third layer filter screen (18), a third layer ball cage (19) and a demister (20) are installed in sequence from bottom to top between the second layer nozzle (11) and the third layer nozzle (12), and the outer ends of the first water inlet pipe (5), the second water inlet pipe (6) and the third water inlet pipe (7) are connected to a return pipe (21) whose lower end is inserted into the sedimentation tank (2), and a centrifuge (22) and a water pump (23) are installed near the lower end of the return pipe (21) near the sedimentation tank (2). The pipe (21) is located between the water pump (23) and the third water inlet pipe (7) and is installed with a return water electric ball valve (24); the return water pipe (21) is located between the second water inlet pipe (6) and the third water inlet pipe (7) and is installed with a flushing electric ball valve (25); the return water pipe (21) is located on one side between the return water electric ball valve (24) and the flushing electric ball valve (25) and is connected to a tap water pipe (26); a tap water electric ball valve (27) is installed on the tap water pipe (26); and an exhaust fan (28) is installed on the exhaust pipe (8).

2. The aluminum spraying waste gas collection and treatment device according to claim 1 is characterized in that: The explosion-proof cyclone dust removal equipment (9) can separate most of the aluminum powder in the waste gas from the gas through the centrifugal force generated by rotation, thereby reducing the dust removal pressure of the spray tower tank (1) and improving the dust removal effect. The centrifuge (22) can further separate the sewage into slag and water to make the circulating water cleaner.

3. The aluminum spraying waste gas collection and treatment device according to claim 1 is characterized in that: The turbulator (13) can cause the passing exhaust gas to generate turbulence and diffuse upward evenly, thereby increasing the contact area and thus increasing the contact opportunity between the exhaust gas and water to promote the reaction and improve the dust reduction efficiency. The demister (20) can block the water vapor from descending to prevent the water from being lost and discharged into the atmosphere.

4. The aluminum spraying waste gas collection and treatment device according to claim 1 is characterized in that: The inner port of the drainage pipe (4) is arranged near the bottom surface of the spray tower tank body (1), and the outer port of the drainage pipe (4) is arranged above the sedimentation tank (2). Through the action of gravity, the sewage inside the spray tower tank body (1) can be discharged into the sedimentation tank (2) in a timely manner.

5. The aluminum spraying waste gas collection and treatment device according to claim 1 is characterized in that: Aluminum spraying waste gas is discharged from the air intake pipe (3) into the spray tower tank body (1) after being dusted by the explosion-proof cyclone dust removal device (9). The installation height of the air intake pipe (3) is higher than the installation height of the drainage pipe (4) to avoid being blocked by sewage in the spray tower tank body (1).

6. The aluminum spraying waste gas collection and treatment device according to claim 1 is characterized in that: All nozzles, filter screens, ball cages, turbulators (13) and demisters (20) are installed horizontally and cover the entire cross-section of the spray tower tank (1) as much as possible, so that all exhaust gases need to pass through them when flowing upward.

7. The aluminum spraying waste gas collection and treatment device according to claim 1 is characterized in that: The first, second and third layers of filter screens and ball cages are installed closely together in pairs, and the first layer of nozzles (10) and the second layer of nozzles (11) are arranged at a certain distance from the filter screen and the ball cage below so that the spray sprayed downwards has enough space to spread and achieve better contact with the exhaust gas.

8. The aluminum spraying waste gas collection and treatment device according to claim 1 is characterized in that: When the waste gas is treated, the return water electric ball valve (24) is opened, the exhaust fan (28) is turned on, the flushing electric ball valve (25) and the tap water electric ball valve (27) are both closed, and then the water pump (23) pumps the clean water after sedimentation in the sedimentation tank (2) upward to the first layer nozzle (10) and the second layer nozzle (11) and sprays it downward into the spray tower tank (1) to knock down the dust in the waste gas.

9. The aluminum spraying waste gas collection and treatment device according to claim 1 is characterized in that: When the flushing operation is performed, the return water electric ball valve (24) is closed, the exhaust fan (28) is turned off, the flushing electric ball valve (25) and the tap water electric ball valve (27) are both opened, and then tap water is simultaneously poured into the first layer nozzle (10), the second layer nozzle (11) and the third layer nozzle (12) and sprayed downward to clean the inside of the spray tower tank (1).

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