Automatic rotary type double-fluid atomizing spray gun for denitration

Abstract

The utility model discloses an automatic rotary type double-fluid atomizing spray gun for denitration, which comprises a support and a cyclone cylinder, the cyclone cylinder is positioned in a cement kiln, a rotating mechanism is arranged at the top of the support, a compressed air pipe and an ammonia water pipe are arranged at the rear end of the rotating mechanism, an air channel is arranged at the front end of the rotating mechanism, and the air channel is communicated with the compressed air pipe and the ammonia water pipe. According to the device, the speed and pressure of ammonia water and air in the channel can be converted into self-rotation force of the device through the power assemblies, and therefore the requirement for automatic rotation of the spray gun is met, and manual regular frequent overturning is not needed; according to the anti-blocking spray gun, the labor intensity of inspection workers is reduced, the air channel and the ammonia water channel can coaxially rotate through the double-outlet rotating joint, compressed air can be introduced into the anti-blocking pipe, and extra power is provided for rotation of the spray gun through the first rotating blade.

Description

Technical Field

[0001] This utility model relates to the field of denitrification technology for cement kilns, and in particular to an automatic rotary dual-fluid atomizing spray gun for denitrification. Background Technology

[0002] With continuous technological advancements, ultra-low emission standards for the cement industry are being raised and tightened. Nitrogen oxides are one of the main pollutants in the cement industry. To improve the efficiency of denitrification in the cement industry, engineers have explored and experimented, ultimately discovering that injecting ammonia water into the cone section of the lowest-level cyclone separator to initiate a denitrification reaction yields ideal results and high denitrification efficiency.

[0003] To spray ammonia into the appropriate area at the cone, most operators need to avoid areas with high material concentration inside the cyclone and spray towards the center. This requires a long spray gun. However, the spray gun is extended deep into the cyclone in a single cantilevered manner, where the temperature is typically 850-890℃. Under such high temperatures, even long spray guns made of heat-resistant stainless steel are prone to slight creep deformation, which can lead to bending under gravity, altering the spray trajectory and preventing ammonia from reaching the intended area. To minimize bending deformation, the long spray gun needs to be rotated 180° every 4-24 hours. This operation is labor-intensive, wastes manpower, and reduces atomization, resulting in decreased denitrification efficiency. Therefore, it is necessary to improve the existing technology to solve these problems. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing an automatic rotary dual-fluid atomizing spray gun for denitrification.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An automatic rotary dual-fluid atomizing spray gun for denitrification includes a support and a cyclone cylinder located inside a cement kiln. The top of the support has a rotating mechanism, and the rear end of the rotating mechanism has a compressed air pipe and an ammonia water pipe. The front end of the rotating mechanism has an air channel, and the air channel contains an ammonia water channel. Both the air channel and the ammonia water channel contain power components. The top of the support is fixedly connected to a second bearing seat, which is also fixed to the rotating mechanism. A second rolling bearing is engaged within the second bearing seat, and the air channel passes through the second rolling bearing. The outer circumference of the air channel is provided with a protective tube support. The front end of the protective tube support has a spray bar, which communicates with both the air channel and the ammonia water channel. The rear end of the protective tube support has a first bearing seat, which is engaged with a first rolling bearing, and the air channel passes through the first rolling bearing.

[0007] As a further embodiment of this utility model, the rotating mechanism includes a dual-outlet rotary joint, the front end of which is fixed to an air channel and an ammonia channel, and the rear end of which is fixed to a compressed air pipe and an ammonia pipe. The air channel and the ammonia channel are respectively connected to the compressed air pipe and the ammonia pipe. The dual-outlet rotary joint is a two-circuit coaxial rotary joint.

[0008] As a further embodiment of this utility model, the power assembly includes a first rotating blade, two second rotating blades, and two third rotating blades. The inner circular end face of the first rotating blade is fixed to the outer circumference of the air channel. The outer circumference of the ammonia channel is provided with two second rotating blades inside the air channel, and the ammonia channel is provided with two third rotating blades inside the ammonia channel.

[0009] As a further embodiment of this utility model, the protective pipe support includes a first quick connector and a second quick connector. The first quick connector is fixedly connected to the outside of the air channel, and a second quick connector is provided at one end of the first quick connector. The first quick connector and the quick connector are fixedly connected by a lever, and the first bearing seat is located inside the second quick connector.

[0010] As a further embodiment of this invention, the first rotating blade, the two second rotating blades, and the two third rotating blades rotate in the same direction.

[0011] As a further embodiment of this utility model, one end of the first quick connector is fixedly connected to a steel pipe, the outer side of the steel pipe is fixed to the inner wall of the cyclone, and the first rotating blade is located inside the steel pipe.

[0012] As a further improvement of this utility model, the outer side of the steel pipe is provided with an anti-blocking pipe, and the anti-blocking pipe is connected to the inside of the steel pipe.

[0013] As a further improvement of this invention, both the first rolling bearing and the second rolling bearing are thrust roller bearings.

[0014] The beneficial effects of this utility model are as follows:

[0015] 1. This utility model is equipped with a power component located in the air channel and the ammonia water channel. The power component can convert the speed and pressure of ammonia water and air in the channel into the self-rotation force of the device, thereby satisfying the automatic rotation of the spray gun. It does not require frequent manual turning, reducing the labor intensity of inspection workers.

[0016] 2. This utility model is provided with a rotating assembly, which includes a dual-outlet rotating head, enabling the air channel and the ammonia water channel to be connected to the compressed air pipe and the ammonia water pipe respectively through the dual-outlet rotating joint, and enabling the air channel and the ammonia water channel to rotate coaxially through the dual-outlet rotating joint.

[0017] 3. This utility model is equipped with an anti-clogging pipe, which is located on the outside of the steel pipe and communicates with the inside of the steel pipe. When the self-rotation is difficult due to the falling material in the cement kiln, compressed air can be introduced into the anti-clogging pipe to provide additional power for the rotation of the spray gun through the first rotating blade.

[0018] 4. This utility model is provided with a first rolling bearing. Both the first rolling bearing and the second rolling bearing are thrust roller bearings. The thrust roller bearings are designed with line contact between the rollers and the raceways, which can withstand extremely high axial loads while maintaining the stability of the rotating shaft and avoiding flexural deformation caused by overload. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of an automatic rotary dual-fluid atomizing spray gun for denitrification proposed in this utility model.

[0020] Figure 2 This is a partial cross-sectional view of an automatic rotary dual-fluid atomizing spray gun for denitrification proposed in this utility model.

[0021] Figure 3 This is an enlarged structural diagram of part A of an automatic rotary dual-fluid atomizing spray gun for denitrification proposed in this utility model.

[0022] Figure 4 This is a cross-sectional view of part B of an automatic rotary dual-fluid atomizing spray gun for denitrification proposed in this utility model.

[0023] In the diagram: 1. Support; 2. Compressed air pipe; 3. Ammonia water pipe; 4. Rotating mechanism; 5. Pipe support; 6. Anti-clogging pipe; 7. Spray bar; 8. Cyclone outer wall; 9. Double-outlet rotary joint; 10. Air passage; 11. First rotating blade; 12. Steel pipe; 13. First quick connector; 14. Ammonia water passage; 15. Second rotating blade; 16. Third rotating blade; 17. First rolling bearing; 18. First bearing housing; 19. Second quick connector; 20. Second rolling bearing; 21. Second bearing housing. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. The described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0025] Reference Figures 1-4 An automatic rotary dual-fluid atomizing spray gun for denitrification includes a support 1 and a cyclone 8 located inside a cement kiln. A rotating mechanism 4 is located at the top of the support 1. A compressed air pipe 2 and an ammonia water pipe 3 are located at the rear end of the rotating mechanism 4. An air channel 10 is located at the front end of the rotating mechanism 4, and an ammonia water channel 14 is located within the air channel 10. Power components are located within both the air channel 10 and the ammonia water channel 14. A second bearing seat 21 is bolted to the top of the support 1 and is fixed to the rotating mechanism 4. A second rolling bearing 20 is engaged within the second bearing seat 21, and the air channel 10 passes through the second rolling bearing 20. A protective pipe support 5 is located on the outer circumference of the air channel 10. A spray rod 7 is located at the front end of the protective pipe support 5 and communicates with both the air channel 10 and the ammonia water channel 14. A first bearing seat 18 is located at the rear end of the protective pipe support 5. The inner clamp is connected to the first rolling bearing 17, and the air channel 10 passes through the first rolling bearing 17. In use, ammonia water is delivered to the ammonia water pipe 3 through the pressure pump and enters the ammonia water channel 14 through the rotating mechanism 4. At this time, the ammonia water flows through the power component in the ammonia water channel 14 at a certain speed and pressure. The impact force here provides the initial power for the self-rotation of the spray gun. Then, compressed air enters the air channel 10 through the compressed air pipe 2 through the rotating mechanism 4. At this time, the compressed air flows through the power component in the air channel 10 at a certain speed. At this time, the power component drives the air channel 10 and the ammonia water channel 14 to rotate in the first rolling bearing 17 and the second rolling bearing 20, thereby satisfying the automatic rotation of the spray gun. It does not require frequent manual turning, reduces the labor intensity of inspection workers, reduces the probability of bending and deformation of long spray guns, ensures the stability of denitrification efficiency, and extends service life.

[0026] In this invention, the rotating mechanism 4 includes a double-outlet rotary joint 9. The front end of the double-outlet rotary joint 9 is fixed to the air channel 10 and the ammonia water channel 14, and the rear end of the double-outlet rotary joint 9 is fixed to the compressed air pipe 2 and the ammonia water pipe 3. The air channel 10 and the ammonia water channel 14 are respectively connected to the compressed air pipe 2 and the ammonia water pipe 3. The double-outlet rotary joint 9 is a two-circuit coaxial rotary joint, enabling the air channel 10 and the ammonia water channel 14 to be connected to the compressed air pipe 2 and the ammonia water pipe 3 respectively through the double-outlet rotary joint 9, and enabling the air channel 10 and the ammonia water channel 14 to rotate coaxially through the double-outlet rotary joint 9, thus improving the synchronization of the device. The power assembly includes a first rotating blade 11 and two second... The ammonia channel 14 has two third rotating blades 16. The inner circular end face of the first rotating blade 11 is fixed to the outer circumference of the air channel 10, allowing the first rotating blade 11 to rotate and drive the air channel 10 to rotate together. The outer circumference of the ammonia channel 14 is located inside the air channel 10 and has two second rotating blades 15, allowing compressed air to flow through the second rotating blades 15 at a certain speed and pressure, driving the air channel 10 and the ammonia channel 14 to rotate. The ammonia channel 14 has two third rotating blades 16, allowing ammonia to flow through the third rotating blades 16 at a certain speed and pressure, driving the ammonia channel 14 to rotate. The pipe support 5 includes a first quick connector. The first quick connector 13 is fixedly connected to the outside of the air passage 10, and the second quick connector 19 is provided at one end of the first quick connector 13. The first quick connector 13 and the quick connector 19 are fixedly connected by a lever, and the first bearing seat 18 is located inside the second quick connector. The first quick connector 13 and the second quick connector 19 can be disassembled and fixed by the lever, which facilitates the removal of the protective pipe support 5 from the spray gun and increases the convenience of the device. In the power assembly, the first rotating blade 11, two second rotating blades 15, and two third rotating blades 16 rotate in the same direction. The number, angle, and arrangement of the blades can be adjusted according to the actual size, weight, air pressure, and liquid pressure of the spray gun. The adjustment involves welding a steel pipe 12 to one end of the first quick connector 13. The outer side of the steel pipe 12 is fixed to the inner wall of the cyclone 8, and the first rotating blade 11 is located inside the steel pipe 12. An anti-clogging pipe 6 is provided on the outer side of the steel pipe 12, and the anti-clogging pipe 6 communicates with the inside of the steel pipe 12, allowing compressed air to be connected to the anti-clogging pipe 6 and then enter the steel pipe 12 on the protective pipe support 5. At this time, the compressed air flows through the first rotating blade 11 at a certain speed, thereby providing additional power for the rotation of the spray gun. Both the first rolling bearing 17 and the second rolling bearing 20 are thrust roller bearings. The thrust roller bearings, through the line contact design between the rollers and the raceway, can withstand extremely high axial loads while maintaining the stability of the rotating shaft and avoiding flexural deformation caused by overload.

[0027] Working principle: When denitrification of the cement kiln is required, ammonia water is delivered by a pressurized pump to ammonia water pipe 3 and enters ammonia water channel 14 through one outlet of the dual-outlet rotary head 9. At this time, the ammonia water flows through the third rotating blade 16 in the ammonia water channel 14 at a certain speed and pressure. The impact force here provides initial power for the self-rotation of the spray gun. Subsequently, compressed air is introduced into the air channel 10 through the other outlet of the dual-outlet rotary head 9 via compressed air pipe 2. At this time, the compressed air flows through the second rotating blade 16 at a certain speed. The impact force here again provides power for the self-rotation of the spray gun. Then, the ammonia water and compressed air enter the spray bar 7, so that the ammonia water and compressed air are sprayed through the spray bar 7. The air converges at the nozzle and is sprayed out in an atomized form. When the spray gun has difficulty rotating due to material falling into the cement kiln, the spray gun is equipped with an anti-clogging pipe 6 and a first rotating blade 11. At this time, compressed air is connected to the anti-clogging pipe 6 and then enters the steel pipe 12 on the protective pipe support 5. The compressed air flows through the first rotating blade 11 at a certain speed, thereby providing additional power for the rotation of the spray gun. This allows the spray gun to rotate automatically without the need for frequent manual turning, reducing the labor intensity of inspection workers. It does not affect the atomization effect and can rotate automatically, reducing the probability of bending and deformation of long spray guns, ensuring the stability of denitrification efficiency, and extending service life.

[0028] Furthermore, although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A kind of automatic rotating double-fluid atomizing lance for denitration, including support (1) and cyclone (8) in cement kiln, it is characterized in that, The top of the support (1) is provided with a rotating mechanism (4), the rear end of the rotating mechanism (4) is provided with a compressed air pipe (2) and an ammonia pipe (3), the front end of the rotating mechanism (4) is provided with an air channel (10), the air channel (10) is provided with an ammonia channel (14), the air channel (10) and the ammonia channel (14) are provided with power components, the top of the support (1) is fixedly connected with a second bearing seat (21), the second bearing seat (21) is fixed with the rotating mechanism (4), the second bearing seat (21) is clamped with a second rolling bearing (20), and the air channel (10) passes through the second rolling bearing (20), the circumferential outer wall of the air channel (10) is provided with a pipe support (5), the front end of the pipe support (5) is provided with a spray rod (7), the spray rod (7) communicates with the air channel (10) and the ammonia channel (14), and the rear end of the pipe support (5) is provided with a first bearing seat (18), the first bearing seat (18) is clamped with a first rolling bearing (17), and the air channel (10) passes through the first rolling bearing (17).

2. The automatic rotating dual fluid atomizing lance for denitration according to claim 1, characterized in that, The rotating mechanism (4) comprises a double-outlet rotary joint (9), the front end of the double-outlet rotary joint (9) is fixed with the air channel (10) and the ammonia channel (14), the rear end of the double-outlet rotary joint (9) is fixed with the compressed air pipe (2) and the ammonia pipe (3), the air channel (10) and the ammonia channel (14) communicate with the compressed air pipe (2) and the ammonia pipe (3) respectively, and the double-outlet rotary joint (9) is a two-circuit coaxial rotary joint.

3. The automatic rotating dual fluid atomizing lance for denitration according to claim 1, characterized in that, The power components comprise a first rotating blade (11), two second rotating blades (15) and two third rotating blades (16), the inner circular end face of the first rotating blade (11) is fixed with the circumferential outer side of the air channel (10), the circumferential outer wall of the ammonia channel (14) in the air channel (10) is provided with the two second rotating blades (15), and the ammonia channel (14) is provided with the two third rotating blades (16).

4. The automatic rotating dual fluid atomizing lance for denitration according to claim 3, characterized in that, The pipe support (5) comprises a first quick connector (13) and a second quick connector (19), the first quick connector (13) is fixedly connected to the outer side of the air channel (10), one end of the first quick connector (13) is provided with the second quick connector (19), the first quick connector (13) and the second quick connector (19) are fixedly connected through a wrench, and the first bearing seat (18) is located in the second quick connector.

5. The automatic rotating dual fluid atomizing lance for denitration according to claim 3, characterized in that, The first rotating blade (11), the two second rotating blades (15) and the two third rotating blades (16) have consistent rotation directions.

6. The automatic rotating dual fluid atomizing lance for denitration according to claim 4, characterized in that, One end of the first quick connector (13) is fixedly connected with a steel pipe (12), the outer side of the steel pipe (12) is fixed with the inner wall of a cyclone drum (8), and the first rotating blade (11) is located in the steel pipe (12).

7. The automatic rotating dual fluid atomizing lance for denitration according to claim 6, characterized in that, The outer side of the steel pipe (12) is provided with an anti-blocking pipe (6), and the anti-blocking pipe (6) communicates with the inside of the steel pipe (12).

8. The automatic rotating dual fluid atomizing lance for denitration according to claim 1, characterized in that, The first rolling bearing (17) and the second rolling bearing (20) are both thrust roller bearings.

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