Rotary kiln head flying sand collecting device
By designing a rotary kiln head flying sand material collection device, the collection box and discharge hopper are used to collect and settle the flying sand material, and the motor-driven discharge baffle and scraper can realize the automatic discharge of the flying sand material and the inner wall cleaning, which solves the wear and pollution problems of the equipment by the long-term flying sand phenomenon, extends the service life of the equipment and ensures stable operation.
Patent Information
- Application Number
- CN202421958764.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-13
- Publication Date
- 2025-05-27
- Estimated Expiration
- 2034-08-13
AI Technical Summary
The long-term flying sand phenomenon causes kiln seal wear, lubricant pollution of the bracket tile, and wear of the wheel belt and bracket tile in the rotary kiln, which in turn affects the stable operation and service life of the equipment.
A rotary kiln head flying sand material collection device is designed, including a kiln head cover and a collection mechanism installed on the side of the kiln head cover. The collection box and drain hopper are used to collect and settle the flying sand material, and the automatic discharge and inner wall cleaning of the flying sand material is achieved through the motor-driven discharge baffle and scraper.
It effectively avoids flying sand material to erode the kiln head seal and contaminate the lubricant of the bracket tile, extends the service life of the rotary kiln, and reduces the post-cleaning strength, achieving the guarantee of stable operation of the equipment.
Smart Images
Figure CN222912296U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of white cement production and processing, in particular to a collecting device for fly ash material at the head of a rotary kiln. Background Technique
[0002] White cement usually needs to be calcined by a rotary kiln. The rotary kiln is a multi-functional high-temperature device that combines a burner, a heat exchanger, a reactor, a conveyor, etc. Raw meal powder is fed into the kiln barrel from the high end of the kiln tail. Due to the inclination and slow rotation of the kiln barrel, the material generates a combined movement that rolls along the circumferential direction and moves axially from the high end to the low end. The raw meal undergoes processes such as decomposition and firing in the kiln, and after being fired into cement clinker, it is unloaded from the low end and enters the cooler.
[0003] At the same time, fuel is sprayed into the kiln from the head hood end and burns in the kiln. The heat generated heats the raw meal to calcine it into clinker. The hot air formed during the heat exchange process with the material enters the kiln tail system (preheater and dust collector) from the kiln feed end, and finally is discharged into the atmosphere through the chimney.
[0004] During the long-term operation of the cement clinker production line, positive pressure at the head of the rotary kiln and the phenomenon of fly ash in front of the kiln will occur to varying degrees. The mechanism and causes of the fly ash material are relatively complex. At the same time, since the fly ash phenomenon generally does not directly affect the stable operation of the kiln system, minor fly ash phenomena often do not attract the high attention of workshop management and technical personnel.
[0005] However, the long-term fly ash phenomenon has brought fatal hidden dangers to the stable operation of the equipment. For example, the fly ash material continuously scours the kiln head seal and its head hood, resulting in serious wear; some flying sand adheres to the head support rollers, contaminating the lubricating oil of the support roller bearings, and at the same time causing varying degrees of scratches and wear to the tyre and the support roller bearings; some flying sand is sucked into the tyre cooling fan, resulting in increased wear of the fan blades and increased vibration. Content of the Utility Model
[0006] Aiming at the deficiencies of the existing technology, the utility model provides a collecting device for fly ash material at the head of a rotary kiln. The specific technical solution is as follows:
[0007] A collecting device for fly ash material at the head of a rotary kiln includes a head hood and a collecting mechanism installed on one side of the head hood. The collecting mechanism includes a collecting box fixedly installed on one side of the head hood for collecting the settled fly ash material, and a discharge hopper fixedly arranged at the bottom of the collecting box. A discharge port is opened on one side of the bottom of the discharge hopper;
[0008] A control mechanism for controlling the discharge switch is arranged in the discharge hopper. The control mechanism includes a motor fixedly arranged in the discharge hopper, a first rotating rod fixedly arranged at the bottom of the output end of the motor and coaxial with the discharge hopper, and a discharge baffle fixedly arranged at the bottom end of the first rotating rod for temporarily blocking the discharge port. A plurality of elastic balls for dredging the bottom of the discharge port are arranged at the top of the discharge baffle.
[0009] By adopting the above technical scheme, the fly ash generated by the positive pressure at the kiln head can be collected and settled through the collection box, so as to avoid the harmful phenomena such as the fly ash scouring the kiln head seal and polluting the lubricating oil of the supporting roller bearing as much as possible.
[0010] Optionally, the first rotating rod is rotatably connected in the discharge hopper. The top of the discharge baffle is in abutting fit with the bottom of the outer wall of the discharge hopper. A plurality of fixing holes are formed in the top of the discharge baffle. Elastic balls are fixedly arranged in the fixing holes of the discharge baffle. The top ends of the elastic balls are movably arranged at the bottom of the discharge port.
[0011] By adopting the above technical scheme, the settled fly ash will enter the discharge hopper, and people can control the motor to drive the discharge baffle to rotate to adjust the opening and closing of the bottom of the discharge hopper.
[0012] Optionally, a scraping plate for scraping off a large area of fly ash adhering to the inner wall of the discharge hopper is fixedly arranged on the outer wall of the first rotating rod.
[0013] By adopting the above technical scheme, through the operation of the motor, the scraping plate can be driven to rotate to scrape off the fly ash adhering in the discharge hopper, reducing the later cleaning intensity of the discharge hopper for people.
[0014] Optionally, a top plate is fixedly arranged at the top of the inner wall of the discharge hopper. A protection box is fixedly arranged at the bottom of one end of the top plate. The motor is fixedly connected to the top of the inner wall of the protection box. A first gear is fixedly arranged on the outer wall of the top end of the first rotating rod. A second gear is meshed and connected to one side of the first gear. A second rotating rod is fixedly arranged in the second gear. A push rod for pushing off the fly ash settled and piled on the top of the top plate is fixedly arranged at the top end of the second rotating rod. The first gear and the second gear are both located inside the protection box. The second rotating rod is rotatably connected between the top plate and the protection box. The top end of the first rotating rod is rotatably connected inside the protection box.
[0015] By adopting the above technical scheme, through the operation of the motor and the connection of components such as the first gear, the push rod can be driven to rotate to push down the fly ash settled and piled on the top plate, facilitating the discharge of materials.
[0016] In summary, the utility model has at least the following beneficial effects:
[0017] 1. The fly ash generated by the positive pressure at the kiln head can be collected and settled through the collection box, thus minimizing the occurrence of harmful phenomena such as fly ash scouring the kiln head seal and contaminating the lubricating oil of the supporting roller bearings, extending the service life of the rotary kiln. The settled fly ash will enter the discharge hopper, and people can control the motor to drive the discharge baffle to rotate to adjust the opening and closing of the bottom of the discharge hopper. The elastic ball can dredge the bottom of the discharge port after rotating with the discharge baffle, facilitating the discharge of materials.
[0018] 2. Through the operation of the motor, it can not only drive the scraper to rotate to scrape off the fly ash adhering to the inside of the discharge hopper, reducing the cleaning intensity of the inside of the discharge hopper for people in the later stage, but also drive the push rod to rotate to push down the fly ash settled and accumulated on the top plate, facilitating the discharge of materials. Overall, with only a single motor drive, multiple processes such as adjusting the opening and closing of the bottom of the discharge hopper and dredging the inside of the discharge hopper can be completed simultaneously, which is convenient and practical. Brief Description of the Drawings
[0019] Figure 1 is the overall structural schematic diagram of the present utility model;
[0020] Figure 2 is the internal structural schematic diagram of the discharge hopper of the present utility model;
[0021] Figure 3 is of the present utility model Figure 2 enlarged view of the structure of the discharge baffle in.
[0022] Description of the reference numerals: 1, kiln head hood; 2, collection box; 3, discharge hopper; 31, discharge port; 4, motor; 41, first rotating rod; 42, discharge baffle; 43, fixing hole; 44, elastic ball; 45, scraper; 5, top plate; 51, protection box; 52, first gear; 53, second gear; 54, second rotating rod; 55, push rod. Detailed Description of the Specific Embodiment
[0023] The following is a further detailed description of the present utility model in conjunction with the attached Figures 1 - 3 drawings.
[0024] Refer to Figure 1 , the embodiment of the present utility model discloses a fly ash collection device for the kiln head of a rotary kiln, including a kiln head hood 1 and a collection mechanism installed on one side of the kiln head hood 1. The kiln head hood 1 is fixedly installed at the kiln head of the rotary kiln, and the collection mechanism is arranged between the kiln head hood 1 and the existing rotary kiln cylinder. Among them, both the kiln head hood 1 and the rotary kiln cylinder are existing structures, and will not be elaborated here too much.
[0025] Refer to Figures 1 - 2, the collecting mechanism includes a collecting box 2 fixedly installed on one side of the kiln head hood 1 for collecting the settled flying sand material, and a discharging hopper 3 fixedly arranged at the bottom of the collecting box 2. A discharging port 31 is opened at one side of the bottom of the discharging hopper 3. The flying sand material generated by the positive pressure at the kiln head is collected by the collecting box 2, and then settles into the discharging hopper 3 under the action of gravity. The flying sand material in the discharging hopper 3 can be discharged through the discharging port 31. After the flying sand material is discharged, it can pass through the external grate chain conveyor hopper and be sent into the clinker storage bin. The grate chain conveyor is a common existing device and will not be elaborated here.
[0026] Refer to Figure 2 , a control mechanism for controlling the discharging switch is arranged in the discharging hopper 3. The control mechanism includes a motor 4 fixedly arranged in the discharging hopper 3, a first rotating rod 41 fixedly arranged at the bottom of the output end of the motor 4 and coaxial with the discharging hopper 3, and a discharging baffle 42 fixedly arranged at the bottom end of the first rotating rod 41 for temporarily blocking the discharging port 31. The top of the discharging baffle 42 is in abutting connection with the bottom of the outer wall of the discharging hopper 3. The first rotating rod 41 is rotatably connected in the discharging hopper 3. After the motor 4 rotates, it will drive the first rotating rod 41 and the discharging baffle 42 to rotate. When the discharging baffle 42 rotates to directly below the discharging port 31, it can temporarily block the discharging port 31, so that the discharging hopper 3 can temporarily collect the settled flying sand material, avoiding the continuous opening of the external grate chain conveyor hopper and increasing the power consumption. When it is necessary to discharge the flying sand material in the discharging hopper 3, the discharging baffle 42 can be rotated away from the discharging port 31, so as to discharge the material normally.
[0027] Refer to Figures 2 - 3 , a number of elastic balls 44 for dredging the bottom of the discharging port 31 are arranged at the top of the discharging baffle 42. A number of fixing holes 43 are opened at the top of the discharging baffle 42. The elastic balls 44 are fixedly arranged in the fixing holes 43 of the discharging baffle 42. The top ends of the elastic balls 44 are movably arranged at the bottom of the discharging port 31. The elastic balls 44 can be elastic spheres such as rubber balls.
[0028] When the discharging baffle 42 rotates to the bottom of the discharging port 31, the elastic balls 44 will push the flying sand material in the discharging port 31 to a certain extent, so as to dredge the discharging port 31. When the discharging baffle 42 rotates away from the discharging port 31, due to being blocked by the outer wall of the discharging hopper 3, the elastic balls 44 will contract into the fixing holes 43 due to elasticity, so as not to hinder the continuous rotation of the discharging baffle 42.
[0029] Refer to Figure 2 , a scraping plate 45 for scraping off a large area of the flying sand material attached to the inner wall of the discharging hopper 3 is fixedly arranged on the outer wall of the first rotating rod 41. After the first rotating rod 41 rotates, it will drive the scraping plate 45 to rotate, so as to scrape off a large area of the flying sand material attached to the inner wall of the discharging hopper 3 and dredge the inside of the discharging hopper 3, reducing the cleaning intensity of the inside of the discharging hopper 3 for people in the later stage.
[0030] Refer to Figure 2, a top plate 5 is fixedly provided at the top inner wall of the discharge hopper 3. At the bottom of one end of the top plate 5, a protection box 51 is fixedly provided. The motor 4 is fixedly connected to the top inner wall of the protection box 51. The protection box 51 can support and hide the protection of the motor 4, and the top plate 5 can support and block components such as the protection box 51.
[0031] Referring to Figure 2 , a first gear 52 is fixedly provided on the outer wall of the top end of the first rotating rod 41. A second gear 53 is meshed and connected to one side of the first gear 52. A second rotating rod 54 is fixedly provided inside the second gear 53. At the top end of the second rotating rod 54, a push rod 55 is provided for pushing away the flying sand material that has settled and accumulated on the top of the top plate 5. The bottom of the push rod 55 is in abutting fit with the top of the top plate 5.
[0032] Referring to Figure 2 , both the first gear 52 and the second gear 53 are located inside the protection box 51. The second rotating rod 54 is rotatably connected between the top plate 5 and the protection box 51. The top end of the first rotating rod 41 is rotatably connected inside the protection box 51. The protection box 51 can hide and protect components such as the first gear 52 and the second gear 53. The second rotating rod 54 is composed of a round rod and a ring. Among them, the ring of the second rotating rod 54 is rotatably connected inside the top plate 5, so that the second rotating rod 54 can rotate on the top plate 5 without detachment.
[0033] After the first rotating rod 41 rotates, it will drive the first gear 52 to rotate. Under the meshing of the first gear 52 and the second gear 53, it will drive the second rotating rod 54 and the push rod 55 to rotate. After the push rod 55 rotates, it can push down the flying sand material that has settled and accumulated on the top plate 5, facilitating discharging.
[0034] The implementation principle of a flying sand material collection device at the kiln head of a rotary kiln according to an embodiment of the present invention is as follows:
[0035] During use, the flying sand material generated by the positive pressure at the kiln head is collected by the collection box 2, and then settles under the action of gravity, so that the discharge hopper 3 can temporarily collect the settled flying sand material;
[0036] When it is necessary to discharge the flying sand material collected in the discharge hopper 3, people can control the motor 4 to rotate, thereby driving components such as the first rotating rod 41, the discharge baffle 42, and the scraper 45 to rotate, and rotating the discharge baffle 42 away from the discharge port 31. At this time, the flying sand material in the discharge hopper 3 will be discharged through the discharge port 31 for unloading;
[0037] After the scraper 45 rotates, it will scrape off a large area of the flying sand material attached to the inner wall of the discharge hopper 3 and dredge the inside of the discharge hopper 3, reducing the cleaning intensity of the inside of the discharge hopper 3 for people in the later stage;
[0038] At the same time, after the first rotating rod 41 rotates, it will drive the first gear 52 to rotate. Under the meshing of the first gear 52 and the second gear 53, it will drive the second rotating rod 54 and the push rod 55 to rotate. After the push rod 55 rotates, it can push down the flying sand material settled and accumulated on the top plate 5, facilitating discharging.
[0039] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.
Claims
1. A device for collecting flying sand at a rotary kiln head, comprising a kiln head cover (1) and a collecting mechanism installed on one side of the kiln head cover (1), characterized in that: The collecting mechanism comprises a collecting box (2) fixedly mounted on one side of the kiln head cover (1) for collecting the flying sand after settling, and a discharging hopper (3) fixedly mounted on the bottom of the collecting box (2), wherein a discharging port (31) is provided on one side of the bottom of the discharging hopper (3); The discharge hopper (3) is provided with a control mechanism for controlling a discharge switch, the control mechanism comprising a motor (4) fixedly arranged in the discharge hopper (3), a first rotating rod (41) fixedly arranged at the bottom of the output end of the motor (4) and coaxial with the discharge hopper (3), and a discharge baffle (42) fixedly arranged at the bottom of the first rotating rod (41) for temporarily blocking the discharge opening (31), wherein a plurality of elastic balls (44) for clearing the bottom of the discharge opening (31) are provided at the top of the discharge baffle (42).
2. The flying sand collecting device at the kiln head of a rotary kiln according to claim 1, characterized in that: The first rotating rod (41) is rotatably connected in the discharge hopper (3), and the top of the discharge baffle (42) is in abutment with the bottom of the outer wall of the discharge hopper (3).
3. The flying sand collecting device at the kiln head of a rotary kiln according to claim 1, characterized in that: A plurality of fixing holes (43) are formed at the top of the discharge baffle (42), and elastic balls (44) are fixedly arranged in the fixing holes (43) of the discharge baffle (42), with the top ends of the elastic balls (44) being movably arranged at the bottom of the discharge port (31).
4. The flying sand collecting device at the kiln head of a rotary kiln according to claim 1 is characterized in that: A scraper (45) is fixedly provided on the outer wall of the first rotating rod (41) for scraping off a large area of flying sand material adhering to the inner wall of the discharge hopper (3).
5. The flying sand collecting device at the kiln head of a rotary kiln according to claim 1, characterized in that: A top plate (5) is fixedly provided on the top of the inner wall of the discharge hopper (3), a protection box (51) is fixedly provided on the bottom of one end of the top plate (5), and the motor (4) is fixedly connected to the top of the inner wall of the protection box (51).
6. The flying sand collecting device at the kiln head of a rotary kiln according to claim 5, characterized in that: A first gear (52) is fixedly provided on the outer wall of the top end of the first rotating rod (41), and a second gear (53) is meshingly connected to one side of the first gear (52).
7. The flying sand collecting device at the kiln head of a rotary kiln according to claim 6, characterized in that: A second rotating rod (54) is fixedly disposed inside the second gear (53), and a push rod (55) is fixedly disposed at the top end of the second rotating rod (54) for pushing away flying sand material that has settled and accumulated on the top of the top plate (5).
8. The flying sand collecting device at the kiln head of a rotary kiln according to claim 7, characterized in that: The first gear (52) and the second gear (53) are both located inside the protection box (51); the second rotating rod (54) is rotatably connected between the top plate (5) and the protection box (51); and the top end of the first rotating rod (41) is rotatably connected inside the protection box (51).