Drying kiln steam piping device

Abstract

The present invention provides a drying kiln steam piping device. A steam piping unit is arranged within a rotary kiln body. An arc-shaped pipe connects a steam inlet pipe and a steam return pipe. The arc-shaped pipes are arranged parallel and spaced apart in the length direction of the steam inlet pipe and the steam return pipe. A web is arranged within the rotary kiln body. The web includes a radial web whose outer end is connected to the rotary kiln body. Three to two radial webs are arranged circumferentially. The radial webs and annular plates on the same web form a sector-shaped area with the inner wall of the rotary kiln body. The steam inlet pipe and the steam return pipe are respectively clamped in a U-shaped notch, with the U-shaped notch pointing in the circumferential direction. Steam piping unit groups are arranged at intervals within the same sector-shaped area and connected by connectors. The present invention realizes that each steam piping unit group is connected into an integral annular cylindrical shape. All steam piping units rotate synchronously with the rotary kiln body, solving the problem of fixing all steam piping units.

Description

Technical Field

[0001] The invention belongs to the field of drying equipment, and in particular relates to a technology for arranging and fixing steam pipelines of a mineral powder drying kiln. Background Art

[0002] The ore powder drying kiln is an upstream operation process of the flash smelting furnace. The mixed copper concentrate with a water content of about 10% coming out of the concentrate batching bin is sent to the ore powder drying kiln through the batching conveyor belt. A large number of steam pipelines are arranged in the ore powder drying kiln. The ore comes into contact with the steam pipes in the drying kiln. Through heat conduction, the ore (ore powder) is heated and the evaporation of water vapor is accelerated to achieve the drying effect. After drying, the dry copper concentrate with a water content of ≤0.3% is discharged from the discharge hopper of the drying kiln and enters the intermediate drying ore bin corresponding to the dryer.

[0003] In the prior art, the steam pipeline in the drying kiln is clamped on a web provided inside the kiln body. The web is provided with a number of U-shaped notches. When installing the steam pipeline unit, the steam inlet pipe or the steam return pipe is first placed within the range of the U-shaped notches, and then a curved metal pad is welded into the notch. Since the gaps between the U-shaped notches and the steam inlet and outlet pipes vary in size, the thickness of the curved metal pad is difficult to control, which inevitably leads to many defects in this installation method:

[0004] There is still a gap between the curved metal pad and the steam pipeline. When the drying kiln rotates and drives the steam pipeline to rotate, the gap between the metal pad and the inlet and outlet pipes of the steam pipeline is difficult to eliminate. The resulting collision, impact and friction between the inlet and outlet pipes of the steam pipeline and the curved metal pad causes the steam pipeline to wear and even wear through the pipe wall, resulting in air leakage, affecting the drying effect of the mineral material; secondly, in addition to pipeline wear, the radial web or the curved metal pad will also wear. When the wear gap becomes larger, the shaking and impact will become more and more severe. Such a vicious cycle will cause impact loads to appear in the operation of the drying kiln, and there will be hidden dangers in the operation of the equipment. The shaking of the pipeline will also cause damage to the seal at the tail of the drying kiln, resulting in serious ash leakage; in addition, the curved metal pad cannot be disassembled after welding, and it is extremely difficult to replace the steam pipeline after it is worn.

[0005] Therefore, the problem of steam pipeline shaking in the mineral powder drying kiln is a safety hazard that the smelter urgently needs to solve. Summary of the Invention

[0006] The object of the present invention is to provide a drying kiln steam pipeline device, which improves the convenience and reliability of pipeline fixation and thus increases the service life of the pipeline.

[0007] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a steam pipeline of a mineral powder drying kiln, characterized in that: a steam pipeline unit is arranged in the cylinder cavity of the rotary kiln body, the steam pipeline unit includes a steam inlet pipe and a steam return pipe, the steam inlet pipe and the steam return pipe are parallel and consistent with the cylinder length direction of the rotary kiln body, the steam inlet pipe and the steam return pipe are connected by an arc pipe, the arc pipes are arranged in parallel and at intervals in the length direction of the steam inlet pipe and the steam return pipe, the steam inlet end of the steam inlet pipe and the steam outlet end of the steam return pipe are located at the discharge end of the rotary kiln body, webs are arranged at intervals from the upstream end to the downstream end in the cylinder cavity of the rotary kiln body, the webs include radial webs whose outer ends are connected to the cylinder wall of the rotary kiln body, the inner ends of the radial webs are fixedly connected to the annular plates, and the radial webs are fixedly connected to the annular plates. 3 to 2 are arranged within the circumferential range, and a fan-shaped area is formed between two adjacent radial webs, the annular plate and the inner wall of the rotary kiln body on the same web. The contours of the corresponding fan-shaped areas in the upstream and downstream adjacent positions on the projection surface perpendicular to the core of the rotary kiln body coincide with each other. The steam inlet pipe and the steam return pipe on the same steam piping unit are respectively clamped in the U-shaped notches opened on the two adjacent radial webs forming the same fan-shaped area, and the U-shaped notch is directed in the circumferential direction. Steam piping units are arranged at intervals from the inside to the outside in the radial range within the same fan-shaped area to form a steam piping unit group. The steam inlet pipe and the steam return pipe or the steam inlet pipe and the steam inlet pipe or the steam return pipe and the steam return pipe on the adjacent sides of the two adjacent steam piping unit groups are connected by connectors.

[0008] In the above scheme, the steam inlet pipe and the steam return pipe of the steam pipeline unit in each sector area in the mineral powder drying kiln (rotary kiln) are clamped in the U-shaped notch opened on the radial web. At the same time, the steam inlet pipe and the steam return pipe on the adjacent sides of two adjacent steam pipeline unit groups are connected by a connector. In this way, the steam pipeline unit groups are connected into an integral annular cylindrical shape, and the steam inlet pipe and the steam return pipe are constrained and fixed on the radial web by the U-shaped notch. All steam pipeline units rotate synchronously with the rotary kiln body, solving the problem of fixing all steam pipeline units. The present invention also has the significant advantages of being easy to disassemble and maintain. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a schematic diagram of the three-dimensional structure of the steam pipeline unit in the present invention;

[0010] Figure 2 yes Figure 1 End view of the steam piping unit shown in;

[0011] Figure 3 yes Figure 1 A top view of

[0012] Figure 4 It is a cross-sectional view of the dryer kiln;

[0013] Figure 5 yes Figure 4 A partial enlarged view of the . DETAILED DESCRIPTION

[0014] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings.

[0015] Combine Figure 1 、 2 , 3, 4, and 5 show the steam pipeline of the mineral powder drying kiln. A steam pipeline unit 30 is arranged in the cylinder cavity of the rotary kiln body 10. The steam pipeline unit 30 includes a steam inlet pipe 31 and a steam return pipe 32. The steam inlet pipe 31 and the steam return pipe 32 are parallel and consistent with the cylinder length direction of the rotary kiln body 10. The steam inlet pipe 31 and the steam return pipe 32 are connected by an arc pipe 33. The arc pipe 33 is arranged in parallel and at intervals in the length direction of the steam inlet pipe 31 and the steam return pipe 32. The steam inlet end of the steam inlet pipe 31 and the steam outlet end of the steam return pipe 32 are located at the discharge end of the rotary kiln body 10. The cylinder cavity of the rotary kiln body 10 is provided with webs 20 at intervals from the upstream end to the downstream end. The webs 20 include radial webs 21 whose outer ends are connected to the cylinder wall of the rotary kiln body 10. The inner ends of the radial webs 21 are fixedly connected to the annular plates 22. The radial webs 21 are arranged in the circumferential range. 3 to 2 of them are arranged, and a fan-shaped area is enclosed between two adjacent radial webs 21 and the annular plate 22 on the same web 20 and the inner wall of the rotary kiln body 10. The contours of the corresponding fan-shaped areas at adjacent upstream and downstream positions on the projection surface perpendicular to the core of the rotary kiln body 10 coincide with each other. The steam inlet pipe 31 and the steam return pipe 32 on the same steam piping unit 30 are respectively clamped at the U-shaped notch 211 opened on the two adjacent radial webs 21 that enclose the same fan-shaped area. The U-shaped notch 211 points in the circumferential direction. The steam piping units 30 are arranged at intervals from the inside to the outside in the radial range within the same fan-shaped area to form a steam piping unit group 30G. The steam inlet pipe 31 and the steam return pipe 32 on the adjacent sides of the two adjacent steam piping unit groups 30G or the steam inlet pipe 31 and the steam inlet pipe 31 or the steam return pipe 32 and the steam return pipe 32 are connected by a connector.

[0016] It should be noted that whether the adjacent sides of the two adjacent steam pipeline unit groups 30G are the steam inlet pipe 31 and the steam return pipe 32, or the steam inlet pipe 31 is adjacent to the steam inlet pipe 31, or the steam return pipe 32 is adjacent to the steam return pipe 32 depends on the steam distribution scheme at the rear end of the rotary kiln body 10. The usual arrangement scheme adopts the arrangement scheme that the adjacent sides of the two adjacent steam pipeline unit groups 30G are the steam inlet pipe 31 and the steam return pipe 32. The following only describes this arrangement.

[0017] The radial web 21 provided in the above solution is provided with a U-shaped notch 211, and the steam inlet pipe 31 and the steam return pipe 32 are clamped in the U-shaped notch 211. Figure 4 For example, Figure 4There are five sector areas, namely A, B, C, D and E. The steam piping unit groups 30G in sector areas A and D have not been installed. The steam piping unit groups 30G are installed in sector areas B, C and E. Taking sector area B as an example, the steam piping units 30 in sector area B constitute the steam piping unit group 30G. The steam inlet pipe 31 in the steam piping unit 30 is clamped in the U-shaped notch 211 at the upper edge of the substantially horizontal radial web 21. The steam return pipe 32 of the steam piping unit 30 is clamped in Figure 4 In the U-shaped notch 211 at the right edge of the radial web 21 on the upper right side, the U-shaped notch 211 at the upper edge of the horizontal radial web 21 and the U-shaped notch 211 at the right edge of the radial web 21 on the upper right side are circumferentially opposite to each other. At this time, the steam piping unit 30 has a small amount of rotational displacement space in the circumferential direction, and the radial displacement of the steam piping unit 30 is limited by the side wall of the U-shaped notch 211; the connecting piece connects the steam inlet pipe 31 of the steam piping unit 30 in the sector area B and the steam return pipe 32 of the steam piping unit 30 in the sector area C. Figure 5 In this way, the air inlet pipes 31 and the steam return pipes 32 of the steam piping units 30 in all adjacent sector-shaped areas are connected to each other. After the steam piping units 30 at equal diameter positions in each adjacent sector-shaped area are connected, they form an annular whole. With the help of the pre-tightening of the connecting pieces connecting the air inlet pipes 31 and the steam return pipes 32, the steam piping units 30 will be appropriately deformed and firmly clamped on the side walls of the U-shaped notch 211, thereby eliminating the possibility of circumferential relative rotational displacement between the steam piping unit 30 and the U-shaped notch 211, and avoiding the possibility of friction between the air inlet pipes 31, the steam return pipes 32 and the radial web 21, resulting in the possibility of the pipe walls being worn through. The service life of the steam piping unit 30, especially the air inlet pipes 31 and the steam return pipes 32 of the steam piping unit 30, is guaranteed.

[0018] There are strip-shaped vertical plates 41 on the upstream and downstream sides of the radial web 21. The length direction of the vertical plate 41 is consistent with the radial direction of the radial web 21. The plate surface of the vertical plate 41 is parallel to the axial direction of the rotary kiln body 10. The arc section of the U-shaped clamp 50 is clamped on the pipe body of the steam inlet pipe 31 and the steam return pipe 32. The straight arm section of the U-shaped clamp 50 passes through the through hole of the vertical plate 41 and is connected to the locking nut 60.

[0019] A vertical plate 41 is provided on only one side of the radial web 21, either upstream or downstream. Multiple radial webs 21 are spaced apart along the length of the rotary kiln body 10. Therefore, providing vertical plates 41 at various locations along the length of the rotary kiln body 10 ensures a secure connection. The vertical plates 41 have holes through which the two arms of the U-shaped clamp 50 pass. Locking nuts 60 are then tightened onto the threaded sections of the arms of the U-shaped clamp 50.

[0020] The above solution is used to realize the circumferential fixed connection of the air inlet pipe 31 and the steam return pipe 32 of the steam pipeline unit 30 in adjacent sector areas, and at the same time limits the radial size thereof, such as Figure 4 As shown, the steam inlet pipe 31 of the steam piping unit 30 in the sector area B is constrained on the vertical plate 41 by the U-shaped clip 50. When the constraint of the steam inlet pipe 31 of the steam piping unit 30 in the sector area B is released, the constraint of the steam return pipe 32 of the steam piping unit 30 in the sector area C is not released. It is very convenient to replace or repair the steam piping unit 30 at a certain radial position in the sector area B, and the steam piping units 30 at other radial positions in the sector area B do not need to be disassembled.

[0021] like Figure 4 、 5 As shown, the vertical plates 41 are the groove walls of the channel steel 40. The notches of the channel steel 40 point away from the surface of the adjacent radial web 21. That is, the bottom of the channel steel 40 is close to the surface of the radial web 21. The outer walls of the vertical plates 41 constituting the groove walls of the channel steel 40 are located within the range between the mouths of the U-shaped notches 211 on either side of the radial web 21. The two opposing vertical plates 41 naturally provided by the two groove walls of the channel steel 40 are spaced apart to connect the steam inlet pipe 31 and steam return pipe 32 of the steam piping unit 30 in the sector-shaped areas B and C, respectively, making installation and disassembly extremely convenient.

[0022] The two vertical plates 41 on the channel steel 40 are located between the bottoms of the U-shaped notches 211 on either side of the same radial web 21. Since the steam piping units 30 are arranged in nine layers in the radial direction, with a total of 45 steam piping units 30 in the five sector-shaped areas, and the steam piping units 30 are composed of numerous arc-shaped tubes 33 welded between the steam inlet pipe 31 and the steam return pipe 32, the size and shape of each steam piping unit 30 are subject to significant errors. Therefore, the specifications of the channel steel 40 must be appropriately selected to ensure that the two vertical plates 41 on the channel steel 40 are located between the bottoms of the U-shaped notches 211 on either side of the same radial web 21. That is, when the vertical plates 41 are connected to the U-shaped clamps 50, the U-shaped notches 211 have sufficient space to accommodate the displacement of the steam inlet pipe 31 and the steam return pipe 32, ensuring that all the steam inlet pipes 31 and the steam return pipe 32 of the pipeline system formed by each steam piping unit 30 form a secure, constrained fit with each U-shaped notch 211 on the radial web 21.

[0023] The channel steel 40 does not need to be directly connected to the rotary kiln body 10, nor does it need to be welded to the radial web 21 and the annular plate 22. It is located in the interval area between adjacent sector areas and is connected to the steam inlet pipe 31 and the steam return pipe 32 of the steam pipeline unit 30 in the adjacent sector area in the circumferential direction.

[0024] The channel steel 40 is ensured to have a certain displacement strain relative to the rotary kiln body 10, and the deformation of the steam pipe unit 30 caused by the pre-tightening force of the connection between each U-shaped clamp 50 and the steam inlet pipe 31 and the steam return pipe 32 is floatingly adapted. That is, during the connection process between the channel steel 40 and the steam inlet pipe 31 and the steam return pipe 32 of the steam pipe unit 30, the position of the channel steel 40 is timely floated and displaced to adapt to the deformation requirements of each steam pipe unit 30. After the steam inlet pipe 31 and the steam return pipe 32 of all the steam pipe units 30 are connected to each channel steel 40, all the steam inlet pipes 31 and the steam return pipes 32 are correspondingly clamped in the U-shaped notches 211 on both sides of each radial web 21 and form a stable constrained and fixed state with each other. The position of the channel steel 40 is also determined accordingly. At this time, the steam inlet pipe 31, the steam return pipe 32, the channel steel 40 and the radial web 21 of all the steam pipe units 30 are connected to the rotary kiln body 10 as a whole and rotate synchronously to dry the ore.

Claims

1. A steam pipeline device for a mineral powder drying kiln, characterized by: A steam pipeline unit (30) is arranged in the cylinder cavity of the rotary kiln body (10). The steam pipeline unit (30) includes a steam inlet pipe (31) and a steam return pipe (32). The steam inlet pipe (31) and the steam return pipe (32) are parallel and consistent with the cylinder length direction of the rotary kiln body (10). The steam inlet pipe (31) and the steam return pipe (32) are connected by an arc pipe (33). The arc pipe (33) is arranged in parallel and spaced apart in the length direction of the steam inlet pipe (31) and the steam return pipe (32). The steam inlet end of the steam inlet pipe (31) and the steam outlet end of the steam return pipe (32) are located at the discharge end of the rotary kiln body (10). The rotary kiln body (10) is provided with webs (20) arranged at intervals from the upstream end to the downstream end in the cylindrical cavity. The webs (20) include radial webs (21) whose outer ends are connected to the cylindrical wall of the rotary kiln body (10). The inner ends of the radial webs (21) are fixedly connected to the annular plates (22). Three to two radial webs (21) are arranged in the circumferential range. Two adjacent radial webs (21) and the annular plates (22) on the same web (20) form a fan-shaped area with the inner wall of the rotary kiln body (10). The fan-shaped areas at corresponding positions adjacent to the upstream and downstream sides are perpendicular to the projection of the cylindrical core of the rotary kiln body (10). The outlines on the shadow surface overlap with each other. The steam inlet pipe (31) and the steam return pipe (32) on the same steam pipe unit (30) are respectively clamped at the U-shaped notch (211) opened on two adjacent radial webs (21) that enclose the same sector area. The U-shaped notch (211) is directed in the circumferential direction. Steam pipe units (30) are arranged at intervals from the inside to the outside in the radial range of the same sector area to form a steam pipe unit group (30G). The steam inlet pipe (31) and the steam return pipe (32) or the steam inlet pipe (31) and the steam inlet pipe (32) on the adjacent sides of the two adjacent steam pipe unit groups (30G) are connected. 1) or the steam return pipe (32) is connected to the steam return pipe (32) by a connecting piece, characterized in that: a strip-shaped vertical plate (41) is provided on the sides of the radial web (21) in the upstream and downstream directions, the length direction of the vertical plate (41) is consistent with the radial direction of the radial web (21), the plate surface of the vertical plate (41) is parallel to the axial direction of the rotary kiln body (10), the arc section of the U-shaped clamp (50) is clamped on the pipe body of the steam inlet pipe (31) and the steam return pipe (32), and the straight arm section of the U-shaped clamp (50) is passed through the through hole of the vertical plate (41) and the arm end section is connected to the locking nut (60).

2. The steam pipeline device for a mineral powder drying kiln according to claim 1, characterized in that: The vertical plate (41) is the groove wall of the channel steel (40), and the groove of the channel steel (40) points in the direction away from the plate surface of the adjacent radial web (21). The outer wall of the vertical plate (41) constituting the groove wall of the channel steel (40) is located within the range between the mouths of the U-shaped notches (211) on both sides of the radial web (21).

3. The steam pipeline device of the mineral powder drying kiln according to claim 2, characterized in that: The two vertical plates (41) on the channel steel (40) are located between the bottoms of the U-shaped notches (211) on both sides of the same radial web (21).

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