Rotary kiln tail flash recovery device

Abstract

Compared with the prior art, the rotary kiln tail flash recovery device has the advantages that flash at the tail of the rotary kiln can be recovered and reused, and waste is reduced; the collecting hopper is arranged below the kiln tail, and a discharging opening is formed in the bottom of the collecting hopper; and the conveying unit comprises a feeding port communicated with the discharging port and a second discharging port arranged above the kiln tail, and the conveying unit can convey materials entering from the feeding port to the second discharging port and discharge the materials from the second discharging port.

Description

Technical Field

[0001] The utility model relates to the technical field of rotary kilns, in particular to a device for recovering overflow materials at the tail of a rotary kiln. Background Art

[0002] In the preparation process of alumina, processes such as crushing, wet grinding, separation and washing are required. After separation and washing, aluminum hydroxide can be prepared. The wet aluminum hydroxide is calcined in a rotary kiln to obtain alumina.

[0003] During operation, aluminum hydroxide is added into the rotary kiln from the tail of the rotary kiln. The head of the rotary kiln is lower than the tail. During the rotation of the rotary kiln, the material can move from the tail to the lower head of the kiln. At present, aluminum hydroxide is added into the rotary kiln through a feed chute. The feeding speed of aluminum hydroxide fluctuates. When the feeding speed of aluminum hydroxide is too fast, the material cannot move in time, resulting in material accumulation at the tail of the kiln. At this time, the material is likely to overflow from the gap between the mouth of the tail of the kiln and the feed chute. Summary of the Utility Model

[0004] The purpose of the utility model is to solve the above problems and provide a device for recovering overflow materials at the tail of a rotary kiln that can recover the overflow materials at the tail of the rotary kiln.

[0005] To achieve the above purpose, the technical solution of the utility model is: a device for recovering overflow materials at the tail of a rotary kiln, comprising:

[0006] A collecting hopper, arranged below the tail of the kiln, and an outlet is arranged at the bottom;

[0007] A conveying unit, including a feed inlet communicated with the outlet and a second outlet arranged above the tail of the kiln. The conveying unit can convey the material entering from the feed inlet to the second outlet and discharge it from the second outlet.

[0008] Further, the conveying unit adopts a bucket elevator, and the bucket elevator includes a driving shaft, and the driving shaft is drivingly connected with the rotary kiln.

[0009] Further, it further includes a rotating shaft arranged in parallel and at intervals with the driving shaft. One end of the rotating shaft is provided with a friction wheel, and the other end is provided with a first belt pulley. The end of the driving shaft is provided with a second belt pulley that is belt-driven with the first belt pulley. The axis of the driving shaft is arranged parallel to the rotary axis of the rotary kiln, and the outer peripheral surface of the friction wheel is in frictional cooperation with the rotary kiln.

[0010] Further, a support ring is arranged on the outer peripheral surface of the rotary kiln, and the friction wheel is in frictional cooperation with the outer peripheral surface of the support ring.

[0011] Further, it further includes a support frame, the support frame includes a horizontally arranged fixed plate, and two strip-shaped holes are arranged in parallel and at intervals at both ends of the fixed plate, and the length direction of the strip-shaped holes is perpendicular to the rotation axis of the rotary kiln.

[0012] Further, the rotary kiln includes a support base, the support base includes a horizontally arranged upper surface, and the fixed plate is arranged on the upper surface.

[0013] Further, the support frame further includes a support arm vertically arranged on the upper surface of the fixed plate, a support sleeve is arranged at the upper end of the support arm, the rotating shaft is rotationally matched with the support sleeve, and the first belt pulley and the friction wheel are respectively arranged on both sides of the support sleeve.

[0014] Compared with the prior art, a rotary kiln tail overflow material recovery device disclosed by the present utility model has the following beneficial effects: it can recover and reuse the overflow material at the tail of the rotary kiln, reducing waste; it includes a collection hopper, which is arranged below the kiln tail and has a discharge port at the bottom; a conveying unit, which includes a feed port communicated with the discharge port and a second discharge port arranged above the kiln tail, and the conveying unit can convey the material entering from the feed port to the second discharge port and discharge it from the second discharge port. Description of the Drawings

[0015] Figure 1 is the overall structural schematic diagram of a rotary kiln tail overflow material recovery device of the present utility model Figure 1 。

[0016] Figure 2 is the overall structural schematic diagram of a rotary kiln tail overflow material recovery device of the present utility model Figure 2 。

[0017] Figure 3 is the left view structural schematic diagram of a rotary kiln tail overflow material recovery device of the present utility model.

[0018] Figure 4 is the side view structural schematic diagram of a rotary kiln tail overflow material recovery device of the present utility model Figure 4 。

[0019] Figure 5 is the right view overall structural schematic diagram of a rotary kiln tail overflow material recovery device of the present utility model Figure 4 。

[0020] Figure 6 is Figure 2 the partial enlarged structural schematic diagram at A in a rotary kiln tail overflow material recovery device of the present utility model shown.

[0021] Figure 7 is Figure 6 the partial enlarged structural schematic diagram at B in a rotary kiln tail overflow material recovery device of the present utility model shown.

[0022] Figure 8 For Figure 5 The partial enlarged structural schematic diagram at C in a reclaiming device for overflow materials at the tail of a rotary kiln as shown

[0023] In the figure: 1. Collection hopper; 11. Discharge port; 12. Discharge pipe; 2. Conveying unit; 20. Driving shaft; 21. Feed inlet; 22. Second discharge port; 23. Second pulley; 24. Guide chute; 25. Silo; 3. Rotating shaft; 31. Friction wheel; 32. First pulley; 33. Transmission belt; 4. Rotary kiln; 40. Support base; 401. Upper surface; 41. Support ring; 5. Support frame; 51. Fixed plate; 510. Strip hole; 52. Support arm; 53. Support sleeve; 6. Vertical plate; 61. Tensioning pulley; 62. Ear plate; 63. Guide rod; 64. Tension spring; 65. Limit nut Specific embodiments

[0024] Now, the present utility model will be further described in detail with reference to the accompanying drawings. The drawings are simplified schematic diagrams, which only illustrate the basic structure of the present utility model in a schematic manner, so they only show the components related to the present utility model

[0025] Please refer to Figures 1 - 5 , the technical solution of the present utility model is: a reclaiming device for overflow materials at the tail of a rotary kiln, comprising:

[0026] A collection hopper 1, which is arranged below the tail of the kiln and is provided with a discharge port 11 at the bottom

[0027] A conveying unit 2, comprising a feed inlet 21 communicated with the discharge port 11 and a second discharge port 22 arranged above the tail of the kiln. The conveying unit can convey the materials entering from the feed inlet 21 to the second discharge port 22 and discharge them from the second discharge port 22

[0028] Specifically, by setting up the collecting hopper 1, when there is overflow material at the kiln tail, it can be collected through the collecting hopper 1. After collection, it can flow down from the discharge port 11 below, and then be introduced into the silo 25 below through the discharge pipe 12 below. The bottom of the silo is set as an inclined structure, and the material can flow along the inclined bottom. A discharge outlet (not shown in the figure) is connected to the side wall of the silo, and the discharge outlet is connected to a guiding inclined pipe 24. The material can flow down under the guiding action of the guiding inclined pipe and flow to the feeding port of the conveying unit 2. Then, the conveying unit 2 is vertically arranged with an opening directly above the kiln tail. Through the conveying unit 2, the material can be lifted and then flow out from the second discharge port 22. When the rotary kiln 4 is working, a guiding chute (not shown in the figure) for guiding the material into the rotary kiln is arranged at the kiln tail. The material falling from the second discharge port 22 can fall into the guiding chute (not shown in the figure) and enter the rotary kiln again, thus achieving the effect of overflow material recovery. Among them, the conveying unit can be any one of the bucket elevator, screw conveyor, etc. in the prior art.

[0029] Further, the conveying unit 2 adopts a bucket elevator, and the bucket elevator includes a driving shaft 20, and the driving shaft 20 is drivingly connected to the rotary kiln.

[0030] As a specific implementation manner, the conveying unit 2 adopts a bucket elevator. The bucket elevator is a common material lifting device in the prior art, including a bucket elevator chain, a lifting bucket arranged on the chain, and a driving shaft for driving the rotation of the bucket elevator chain. The driving shaft is driven by a driving motor, and its specific structure will not be described in detail one by one. Those skilled in the art should understand that in this application, by drivingly connecting the driving shaft 20 of the bucket elevator to the rotary kiln, when the rotary kiln rotates, it drives the driving shaft 20 to rotate, thereby driving the bucket elevator to work and lifting the material, without the need to additionally set a lifting driving motor.

[0031] Further, as a specific implementation manner, the driving connection structure between the driving shaft 20 and the rotary kiln is: Refer to Figure 1 、 Figure 2 、 Figure 4 、 Figure 6 , this application further includes a rotating shaft 3 arranged in parallel and spaced apart from the driving shaft 20. One end of the rotating shaft 3 is provided with a friction wheel 31, and the other end is provided with a first pulley 32. The end of the driving shaft 20 is provided with a second pulley 23 that is belt-driven with the first pulley 32. The axis of the driving shaft 20 is arranged parallel to the rotation axis of the rotary kiln, and the outer peripheral surface of the friction wheel 31 is in frictional cooperation with the rotary kiln 4.

[0032] Specifically, the outer peripheral surface of the friction wheel 31 is frictionally matched with the rotary kiln. When the rotary kiln rotates, the friction wheel 31 can be driven to rotate under the action of friction force, and the friction wheel drives the rotating shaft 3 to rotate, and the rotating shaft drives the first pulley 32 to rotate. The first pulley drives the second pulley 23 to rotate through the transmission belt 33, and the second pulley 23 drives the driving shaft to rotate, thereby achieving the driving purpose.

[0033] Further, as an implementation mode, a support ring 41 is provided on the outer circumference of the rotary kiln 4 , and the friction wheel 31 is frictionally matched with the outer circumference of the support ring 41 .

[0034] Specifically, a support ring 41 is provided on the side wall of the rotary kiln, the support ring 41 provides support force for the rotary kiln and ensures the stable operation of the rotary kiln. The outer peripheral surface of the support ring 41 has good surface quality, and the rotary axis of the rotary kiln is coaxially arranged with the outer peripheral surface of the support ring, so that it can be better and more stably connected to the friction wheel 31, and the wheel surface of the friction wheel 31 is not easily damaged, thereby improving the service life.

[0035] Further, as a specific implementation method, refer to Figure 6 , Figure 7 The present application also includes a support frame 5, the rotating shaft 3 is rotatably arranged on the support frame 5, the support frame 5 includes a horizontally arranged fixing plate 51, two ends of the fixing plate 51 are parallelly and spaced apart from each other and two strip holes 510 are arranged, and the length direction of the strip holes 510 is perpendicular to the rotation axis of the rotary kiln.

[0036] Specifically, it is understandable that the friction wheel 31 will wear during use, and after being used for too long, the friction wheel 31 and the support ring will not be able to effectively contact each other. In the present application, two strip holes 510 are set on the fixing plate 51. When the fixing plate 51 is fixed, the strip holes 510 can be used to adjust the displacement in the direction of approaching and moving away from the rotary kiln. When the wheel surface of the friction wheel 31 is worn, the support frame can be adjusted to adjust the distance between the friction wheel and the support ring, thereby ensuring that the friction wheel 31 can be in good contact with the support ring.

[0037] Further, as a specific implementation, the rotary kiln 4 includes a support base 40, and the support base 40 includes a horizontally arranged upper surface 401, and the fixing plate 51 is arranged on the upper surface.

[0038] Specifically, refer to Figure 6 , Figure 7 Two threaded holes (not shown in the figure) corresponding to the two bar holes are provided on the support base 40, and a locking screw can be passed through the bar hole and screwed to the threaded hole (not shown in the figure). The fixing plate 51 is locked by the locking screw. When the position of the fixing plate 51 needs to be adjusted, the locking screw is loosened and the fixing plate 51 is slid on the upper surface 401. After adjusting to the appropriate position, the locking screw can be locked again.

[0039] Further, as a preferred embodiment, referring to Figure 4 , the support frame 5 further includes a support arm 52 vertically disposed on the upper surface of the fixing plate 51. A support sleeve 53 is provided at the upper end of the support arm. The rotating shaft 3 is rotatably engaged with the support sleeve 53. The first pulley 32 and the friction wheel are respectively disposed on both sides of the support sleeve. By providing the support sleeve 53 and arranging the first pulley 32 and the friction wheel on both sides of the support sleeve, this structure can ensure that the installation and replacement of the friction wheel and the first pulley do not affect each other, facilitating later maintenance.

[0040] Further, referring to Figure 4 、 Figure 5 、 Figure 8 , on one side of the transmission belt 33, a vertical plate 6 is provided on the outer shell of the conveying unit 2. Two guide rods 63 are horizontally guided on the vertical plate 6. The guide rods 63 are perpendicular to the axis of the rotary kiln. An ear plate 62 is provided at the end of the guide rod 63. A tension pulley 61 is rotatably provided on the ear plate. A tension spring 64 is sleeved on the guide rod. Both ends of the tension spring 64 are respectively abutted against the vertical plate and the ear plate. The other end of the guide rod is threadedly connected with a limit nut. By this setting method, the tension pulley 61 can be brought into contact with the transmission belt 33 by the elastic force of the tension spring 64 to tension the transmission belt 33, which can ensure the tension degree of the transmission belt 33 and ensure the transmission efficiency.

[0041] Obviously, the above embodiments are merely examples given for clear illustration and are not limitations on the embodiments. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to enumerate all the embodiments here. And the obvious changes or modifications derived therefrom are still within the protection scope of the present invention.

Claims

1. A device for recycling overflow materials at the tail of a rotary kiln, characterized in that, Comprising: A collecting hopper (1), arranged below the tail of the kiln, and an outlet (11) is provided at the bottom; A conveying unit (2), comprising a feed inlet (21) communicated with the outlet (11) and a second outlet (22) arranged above the tail of the kiln. The conveying unit can convey the material entering from the feed inlet (21) to the second outlet (22) and discharge it from the second outlet (22).

2. The overflow material recovery device at the tail of the rotary kiln according to claim 1, wherein, The conveying unit (2) adopts a bucket elevator, and the bucket elevator comprises a driving shaft (20), and the driving shaft (20) is drivingly connected with the rotary kiln.

3. The overflow material recovery device at the tail of a rotary kiln according to claim 2, characterized in that, It further comprises a rotating shaft (3) arranged in parallel and at intervals with the driving shaft (20). One end of the rotating shaft (3) is provided with a friction wheel (31), and the other end is provided with a first belt pulley (32). The end of the driving shaft (20) is provided with a second belt pulley (23) belt-driven with the first belt pulley (32). The axis of the driving shaft (20) is arranged parallel to the rotary axis of the rotary kiln, and the outer peripheral surface of the friction wheel (31) is in frictional cooperation with the rotary kiln (4).

4. A recovery device for overflow materials at the tail of a rotary kiln according to claim 3, characterized in that, A support ring (41) is arranged on the outer peripheral surface of the rotary kiln (4), and the friction wheel (31) is in frictional cooperation with the outer peripheral surface of the support ring (41).

5. The overflow material recovery device at the tail of a rotary kiln according to claim 4, characterized in that, It further comprises a support frame (5), the rotating shaft is rotatably arranged on the support frame, and the support frame (5) comprises a horizontally arranged fixing plate (51). Two strip holes (510) are arranged in parallel and at intervals at both ends of the fixing plate (51), and the length direction of the strip holes (510) is perpendicular to the rotary axis of the rotary kiln.

6. The overflow material recovery device at the tail of a rotary kiln according to claim 5, characterized in that The rotary kiln (4) comprises a support base (40), and the support base (40) comprises a horizontally arranged upper surface (401), and the fixing plate (51) is arranged on the upper surface.

7. A recovery device for overflow materials at the tail of a rotary kiln according to claim 6, characterized in that, The support frame (5) further comprises a support arm (52) vertically arranged on the upper surface of the fixing plate (51). A support sleeve (53) is arranged at the upper end of the support arm, the rotating shaft (3) is rotatably matched with the support sleeve (53), and the first belt pulley (32) and the friction wheel are respectively arranged on both sides of the support sleeve.

Images