A rotary kiln cylinder driving device for sulfuric acid method titanium dioxide production

Abstract

The utility model discloses a rotary kiln cylinder drive arrangement for sulphuric acid method titanium dioxide production belongs to rotary kiln equipment technical field, including frame, the horizontal setting transmission shaft of rotation installation has on the frame, the transmission shaft coaxially fixed has the driving gear on, the driving gear's above meshing transmission has the driven gear disc of the diameter greater than the driving gear, and the motor of driving transmission shaft rotation is installed to the side of frame, the inside of driven gear disc is equipped with the support arm of multiple circumferential array distribution, and all support arm's one end rotation is connected in the inside of driven gear disc, and all support arm's other end is connected on the flange disc of cylinder. Through adopting "driven gear disc + adjustable support arm " core design, namely: in the inside of driven gear disc increases rotatable support arm, through with the same direction rotation of the inside support arm of driven gear disc, can connect the cylinder of different diameter specifications, solved the problem of traditional rotary kiln drive arrangement poor adaptability, high replacement cost.

Description

Technical Field

[0001] This utility model relates to the technical field of rotary kiln equipment, specifically a rotary kiln cylinder drive device for the production of titanium dioxide using the sulfuric acid process. Background Technology

[0002] The sulfuric acid process for titanium dioxide production mainly consists of five core stages: titanium ore preparation, acid hydrolysis, hydrolysis, calcination, and post-treatment. Specifically: Titanium ore preparation: Ilmenite is crushed and ground to a particle size ≤0.15mm to remove magnetic impurities; Acid hydrolysis reaction: Titanium ore powder reacts with concentrated sulfuric acid (92%-98%) at high temperature (120-180℃) to generate titanium oxysulfate solution; Sedimentation and filtration: Impurities are separated from the acid hydrolysis solution in a sedimentation tank, and unreacted slag is removed by a plate and frame filter press; Hydrolysis reaction: Titanium oxysulfate is hydrolyzed to generate metatitanic acid slurry, requiring temperature control (90℃) and seed crystal addition; Calcination: Metatitanic acid is calcined at high temperature (800-1000℃) in a rotary kiln to convert it into primary titanium dioxide; Post-treatment includes crushing, grading, surface coating (inorganic / organic treatment), and packaging.

[0003] During the calcination stage: The direct drive device used to drive the rotation of the cylinder in the rotary kiln is mostly a toothed disc connected to the cylinder. Each toothed disc can only match a cylinder of a fixed diameter. When changing to a cylinder of a different specification to meet production needs, the corresponding toothed disc also needs to be changed. This not only results in poor application flexibility, but also in the fact that the toothed disc is large and requires high machining precision. Frequent replacements also increase production costs. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a rotary kiln cylinder driving device for the production of titanium dioxide using the sulfuric acid process. By adopting a structural design of "driven toothed disc + adjustable support arm", it can adapt to the needs of different cylinder specifications, eliminate the need for frequent toothed disc replacement, reduce replacement costs and improve the flexibility of use, and solve the problems of poor flexibility and high replacement costs of the toothed disc in the existing driving cylinder.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A rotary kiln cylinder drive device for the production of titanium dioxide using the sulfuric acid process includes a frame, a transversely arranged transmission shaft rotatably mounted on the frame, a drive gear coaxially fixed on the transmission shaft, a driven gear disc with a diameter larger than the drive gear meshing above the drive gear, and a motor for driving the transmission shaft to rotate installed next to the frame. Its core improvement lies in the fact that the inner side of the driven gear disc is provided with multiple circumferentially arrayed support arms, one end of all the support arms is rotatably connected to the inner side of the driven gear disc, and the other end of all the support arms is connected to the flange of the cylinder.

[0006] By adopting the above solution and the core design of "driven toothed disc + adjustable support arm", that is, by adding a rotatable support arm to the inside of the driven toothed disc, different diameter cylinders can be connected by rotating the support arm inside the driven toothed disc in the same direction, thus solving the problems of poor adaptability and high replacement cost of traditional rotary kiln drive devices.

[0007] In a preferred embodiment of a rotary kiln cylinder drive device for sulfuric acid process titanium dioxide production, in order to achieve the connection of the support arm, the connection end between the support arm and the driven gear plate is designed as a single joint, and the connection end between the support arm and the flange is designed as a double joint.

[0008] In a preferred embodiment of a rotary kiln cylinder drive device for sulfuric acid process titanium dioxide production, an avoidance groove is provided on the support arm at the location of the double joint in order to avoid the flange.

[0009] As a preferred embodiment of a rotary kiln cylinder drive device for sulfuric acid process titanium dioxide production, the support arm is an arc-shaped support arm, which not only fits the contours of the driven gear plate (circular) and the flange (circular) better, but also reduces space occupation and optimizes torque transmission.

[0010] In a preferred embodiment of a rotary kiln cylinder drive device for sulfuric acid process titanium dioxide production, the support arm is connected to a reinforcing rib on at least one side to further strengthen the support arm and improve the stability and reliability of the connection.

[0011] In a preferred embodiment of a rotary kiln cylinder drive device for the production of titanium dioxide using the sulfuric acid process, through holes are provided on the reinforcing ribs in an array distributed along their length to reduce weight and lower production costs.

[0012] As a preferred embodiment of a rotary kiln cylinder drive device for sulfuric acid process titanium dioxide production, the frame is also fixed with arc-shaped brackets located on the left and right sides of the drive gear. The front and rear ends of the arc-shaped brackets are respectively rotatably mounted with vertically arranged movable frames. The upper and lower ends of the movable frames are distributed with limiting wheels that rotate and contact the side wall of the cylinder. The function of the limiting wheels is as follows: through the rolling contact of the limiting wheels, the radial runout of the cylinder is limited, the coaxiality of the cylinder during rotation is ensured, and wear or vibration caused by eccentricity is avoided.

[0013] In a preferred embodiment of a rotary kiln cylinder drive device for sulfuric acid process titanium dioxide production, a reducer is also installed between the motor and the drive shaft. The reducer further converts the high speed and low torque of the motor into low speed and high torque to meet the driving requirements of the rotary kiln.

[0014] The beneficial effects of this utility model are: 1. Universal compatibility: The driven gear is a fixed large gear, which is connected to the cylinder flange through the circumferential array of support arms. When changing the cylinder, only the connection between the support arms and the flange needs to be adjusted, without the need to replace the driven gear, thus solving the problems of poor flexibility and high cost when the gear is replaced with the cylinder. 2. Stable connection: The outrigger adopts a "single joint + double joint" design. The double joint increases the contact area with the flange, and the avoidance groove avoids interference and improves the connection strength. The arc-shaped outrigger fits the circular contour, reducing space occupation and optimizing torque transmission. 3. Reliable structure: Reinforcing ribs enhance the bending and torsional resistance of the support arm, and through holes reduce weight; 4. Precise guidance: The arc-shaped bracket, movable frame and limit wheel constitute the guidance system, which limits the radial runout of the cylinder and ensures the coaxiality of rotation. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 A three-dimensional structural diagram of the rotary kiln cylinder drive device used in the sulfuric acid process for titanium dioxide production. Figure 2 A three-dimensional structural diagram of the rotary kiln cylinder drive device used in the sulfuric acid process for titanium dioxide production; Figure 3 This is a partial three-dimensional structural diagram of the rotary kiln cylinder; Figure 4 A front view of the rotary kiln cylinder drive unit used in the sulfuric acid process for titanium dioxide production; Figure 5 Left view of the rotary kiln cylinder drive unit used in the sulfuric acid process for titanium dioxide production; Figure 6 This is a three-dimensional structural diagram of the driving gear and driven gear disk in Example 1; Figure 7 This is a three-dimensional structural diagram of the support arm in Embodiment 1; Figure 8 A three-dimensional structural diagram of the arc-shaped bracket and its limiting wheels; Figure 9 This is a three-dimensional structural diagram of the support arm in Example 2.

[0017] Reference numerals in the attached drawings: 1-Frame; 2-Drive shaft; 3-Driving gear; 4-Driven gear disc; 5-Motor; 6-Support arm; 7-Cylinder; 8-Flange; 9-Single joint; 10-Double joint; 11-Allowing groove; 12-Arc-shaped bracket; 13-Movable frame; 14-Limit wheel; 15-Reducer; 16-Reinforcing rib; 17-Through hole. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Example 1, as Figures 1 to 4 As shown, a rotary kiln cylinder drive device for the production of titanium dioxide using the sulfuric acid process is used to drive the rotary kiln cylinder 7 to rotate, so that metatitanic acid can be calcined at high temperature (800-1000℃) in the rotary kiln to be converted into titanium dioxide primary product. It includes a frame 1, a horizontally arranged transmission shaft 2 is rotatably mounted on the frame 1, a drive gear 3 is coaxially fixed on the transmission shaft 2, and a driven gear disk 4 with a diameter larger than the drive gear 3 meshes above the drive gear 3. A motor 5 that drives the transmission shaft 2 to rotate is installed next to the frame 1, and there are two sets of motors 5, one on the left and one on the right.

[0020] like Figures 1 to 6 As shown, the inner side of the driven gear disk 4 is provided with 18 circumferentially arrayed support arms 6. One end of all support arms 6 is rotatably connected to the inner side of the driven gear disk 4 via a shaft, and the other end of all support arms 6 is connected to the flange 8 of the cylinder 7 via a shaft. By adopting the core design of "driven gear disk + adjustable support arms", that is, by adding rotatable support arms 6 to the inner side of the driven gear disk 4, cylinders 7 of different diameters can be connected by rotating the support arms 6 on the inner side of the driven gear disk 4 in the same direction, the problems of poor adaptability and high replacement cost of traditional rotary kiln drive devices are solved.

[0021] like Figure 7 As shown, in order to achieve the connection of the support arm 6, the connection end between the support arm 6 and the driven gear plate 4 is designed as a single joint 9, which is integrally formed with the support arm 6. The connection end between the support arm 6 and the flange 8 is designed as a double joint 10, which is integrally formed with the support arm 6.

[0022] Continue as Figure 7 As shown, the support arm 6 is an arc-shaped support arm 6, which not only fits the contours of the driven gear plate 4 (circular) and the flange 8 (circular) better, but also reduces space occupation and optimizes torque transmission.

[0023] like Figure 8 As shown, arc-shaped brackets 12 located on the left and right sides of the drive gear 3 are also welded and fixed on the frame 1. The front and rear ends of the arc-shaped brackets 12 are respectively mounted with vertically arranged movable frames 13 through shafts. The upper and lower ends of the movable frames 13 are distributed with limiting wheels 14 that rotatably contact the side wall of the cylinder 7 through shafts. The function of the limiting wheels 14 is as follows: through the rolling contact of the limiting wheels 14, the radial runout of the cylinder 7 is limited, the coaxiality of the cylinder 7 during rotation is ensured, and wear or vibration caused by eccentricity is avoided.

[0024] like Figure 4 As shown, a reducer 15 is also installed between each motor 5 and the drive shaft 2. The reducer 15 further converts the high speed and low torque of the motor 5 into low speed and high torque to adapt to the driving requirements of the rotary kiln.

[0025] Working principle of Example 1: Power is output from motor 5, and after the speed is reduced and the torque is increased by reducer 15, it drives transmission shaft 2 to rotate. Transmission shaft 2 drives coaxial fixed drive gear 3 to rotate. Drive gear 3 meshes with driven gear disk 4, driving driven gear disk 4 to rotate. Driven gear disk 4 transmits rotational motion to flange 8 of cylinder 7 through circumferential array of support arms 6, ultimately driving cylinder 7 to rotate.

[0026] When replacing the cylinder 7 with a larger diameter cylinder, rotate all the support arms 6 clockwise around the single connector 9. At this time, all the support arms 6 are closer to the inside of the driven gear plate 4, and can be connected to the flange 8 with a larger diameter. After aligning the double connector 10 with the positioning hole on the flange 8, the replacement of the cylinder 7 with a larger diameter cylinder can be completed. When replacing the cylinder 7 with a smaller diameter cylinder, rotate all the support arms 6 counterclockwise around the single connector 9. At this time, all the support arms 6 are closer to the flange 8, and can be connected to the flange 8 with a smaller diameter. After aligning the double connector 10 with the positioning hole on the flange 8, the replacement of the cylinder 7 with a smaller diameter cylinder can be completed. In addition, when replacing different cylinders 7, the corresponding matching limit wheel 14 should also be replaced.

[0027] Example 2, as Figure 9 As shown, the only difference between this embodiment and Embodiment 1 is that, based on Embodiment 1, a reinforcing rib 16 is connected to one side of the support arm 6 to further strengthen the support arm 6 and improve the stability and reliability of the connection; and through holes 17 are provided on the reinforcing rib 16 in an array distributed along its length direction to reduce weight and lower production costs.

[0028] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A rotary kiln cylinder driving device for the production of titanium dioxide using the sulfuric acid process, comprising a frame, a transversely arranged transmission shaft rotatably mounted on the frame, a drive gear coaxially fixed on the transmission shaft, a driven gear disc with a diameter larger than the drive gear meshing above the drive gear, and a motor for driving the transmission shaft to rotate mounted next to the frame. Its features are: The driven gear disc has multiple circumferentially arrayed support arms on its inner side. One end of each support arm is rotatably connected to the inner side of the driven gear disc, and the other end of each support arm is connected to the flange of the cylinder.

2. The rotary kiln cylinder drive device for sulfuric acid process titanium dioxide production according to claim 1, characterized in that: The connection end between the support arm and the driven gear plate is a single joint, and the connection end between the support arm and the flange is a double joint.

3. The rotary kiln cylinder drive device for sulfuric acid process titanium dioxide production according to claim 2, characterized in that: The support arm is provided with a clearance groove located at the location of the double joint.

4. The rotary kiln cylinder drive device for sulfuric acid process titanium dioxide production according to claim 1, characterized in that: The support arm is an arc-shaped support arm.

5. The rotary kiln cylinder drive device for sulfuric acid process titanium dioxide production according to claim 1, characterized in that: The arm is connected to a reinforcing rib on at least one side.

6. The rotary kiln cylinder drive device for sulfuric acid process titanium dioxide production according to claim 5, characterized in that: The reinforcing rib has through holes arranged in an array along its length.

7. The rotary kiln cylinder drive device for sulfuric acid process titanium dioxide production according to claim 1, characterized in that: The frame is also fixed with arc-shaped brackets located on the left and right sides of the drive gear. The front and rear ends of the arc-shaped brackets are respectively rotatably mounted with vertically arranged movable frames. The upper and lower ends of the movable frames are distributed with limiting wheels that rotatably contact the side wall of the cylinder.

8. The rotary kiln cylinder drive device for sulfuric acid process titanium dioxide production according to claim 1, characterized in that: A speed reducer is also installed between the motor and the drive shaft.

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