• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    This invention relates to a method and device to be used in connection with thickening and clarifying apparatuses for shear-thinning of solids containing material such as slurry. According to the invention the flow area of the shear-thinned material (11) is restricted by arranging a restriction element (12) in the conduit (4,15) for discharging back the shear-thinned material (11).
    公开号:SE534728C2
    申请号:SE0850097
    申请日:2007-04-27
    公开日:2011-12-06
    发明作者:Richard Triglavcanin
    申请人:Outotec Oyj；
    IPC主号:
    专利说明:

    534 728 through two pipes so that the openings of the pipes are mounted in the wall of the thickener. The openings of the tubes are preferably located substantially concentrically in relation to each other within the same surface in relation to the movement of the slurry in these openings. The openings of the pipes are of different sizes. that one of the openings is located inside the other opening. One of the openings is for feeding thickened material, such as slurry from the thickener to be shear thinned, and one of the openings is for emptying the shear thinned material back to the thickener. According to this invention, the flow area of the shear-thinned material is limited in that a restriction element is arranged in the tube for emptying back the shear-thinned material. This advantageously increases the shear effect because limiting emptying fate exerts back pressure on the shear thinner. By doing so, the shear thinning apparatus must perform more work. More work is performed on the slurry and thus increases the shear effect on the slurry. The restriction element is a controllable valve, a manual valve or a throttle or some other similar mechanism which reduces the flow area of the shear thinning material. There is a pressure drop across the restriction element, an increased speed, fatal disturbances, increased mixing or any other similar effect, which adds work or energy to the shear thinned material and shifts the slurry material further and improves the shear thinning. According to an embodiment of the invention, the flow area of the shear-thinned material is limited in that the restriction element is arranged at the end of the tube which is connected to the shear-thinning apparatus. According to an embodiment of the invention, the flow area of the shear-thinned material is limited in that the restriction element is arranged in a part of the tube which is not concentric.
    The flow area of the shear thinned material is limited in that a restriction element is arranged either in the tube which has a larger outer dimension or a smaller dimension at the end which is connected to the thickening apparatus. When the surrounding pipe is used as an emptying pipe in the shear thinner pump, the emptied and shear thinned slurry is mixed efficiently with incoming slurry to be shear thinned. This arrangement where the smaller tube is used for emptying the shear thinned material into the thickener is advantageous in cases where the thickening emptying takes place from the lower cone in the thickener. By using substantially concentric feed and discharge openings for the slurry material, the emptied and shear thinned slurry material from the shear thinner device is mixed with the thick slurry near the feed opening at the intake, thereby improving the feed flow of the thick slurry into the shear thinner.
    In the tube between the shear thinning apparatus and the restriction element, a discharge line is arranged for emptying at least a part of the shear thinned material. A portion of the shear-thinned material before being returned to the thickener is channeled into a separate discharge tube for removal for further processing. The amount of emptied material via the emptying line is controlled by the restriction element and the shear thinner. According to the invention, the same shear thinner can be used for both thinner and thickener emptying tasks. A control system for the pump rotation and valve function is necessary to balance the amount of thinning and emptying fate. Typically, a centrifugal pump is used for shear thinning. In some solutions, a cyclic motion is beneficial for the thinning of the slurry. But an impact diaphragm pump can be used instead of a centrifugal pump.
    According to an embodiment of the invention, the flow area of the shear-thinned material is limited in that the restriction element is arranged in at least a part of the tube which is concentric. The flow of the shear-thinned material after the restriction element in the tube can connect to the wall of the thickener in any direction suitable for the process conditions, such as substantially perpendicular, tangential, upward or downward depending on the design of the device.
    The invention is described in more detail in the following part which refers to the accompanying drawings, in which Fig. 1 shows a preferred embodiment of the invention in a schematic manner in a partially cropped side angle, 534 728 Fig. 2 shows another preferred embodiment of the invention in a schematic manner at a partially cropped side angle. In accordance with Fig. 1 in a wall 2 of a thickener 1, two pipes 3 and 4 are mounted so that the pipe 3 is concentrically placed inside the pipe 4. Thus the pipe 3 has a smaller external dimension than the pipe 4. The spirit of the pipe 4 which has a larger outer dimension, which end is connected to the wall 2 of the thickener 1, forms an opening S for the tube 4. The tube 3 having a smaller outer dimension is mounted inside the tube 4 so that the end of the tube 3 forms an opening 6, which is placed in the same surface with the opening of the tube 4.
    The tube 3 inside the tube 4 is connected to a shear thinner apparatus 7, typically one such as a centrifugal pump or an impact diaphragm pump. Thus, the tube 3 acts as a feed tube for slurry 8 to be shear thinned by the means of apparatus 7. The tube 3 is also provided with a coupling 9 for dilution water 10 to be fed into the slurry 8 to be shear thinned.
    The shear thinning apparatus 7 is further connected to the tube 4 through which the shear thinned material 11 is emptied back into the thickener 1 via the tube 4. According to the invention, in the tube 4 which empties the shear thinned material 11 back to the thickener 1 a restriction element 12 is arranged, such as a valve that is controlled to enable improvement of the shear thinning effect.
    The restriction element 12 is arranged at the end of the tube which is connected to the shear thinner apparatus 7 and preferably in the part of the tube which is not concentric. Between the shear thinning apparatus 7 and the restriction element 12, an emptying line 13 is arranged for emptying a part of the shear thinned material 11 without any passage into the thickener 1 for further processing.
    The amount of emptied material via the emptying line 13, 20 is controlled by the restriction element 12 and the shear thinning apparatus 7. The emptying line 13 may be provided with a pump to intensify the emptying for further processing. According to Fig. 1, the flow area of the shear thinned material 11 is limited in that a restriction element 12 is arranged in the tube 4 which has a larger outer dimension at the end which is connected to the thickening apparatus 1. 534 728 According to Fig. 2, two tubes 15 and 16 mounted in a wall 2 in a thickener so that the tube 15 is concentrically placed inside the tube 16. Thus, the tube 15 has a smaller outer dimension than the tube 16. The end of the tube 16 having a larger outer dimension, which end is connected to the wall 2 in the thickener 1, forms an opening 17 for the tube 16. The tube 15 having a smaller outer dimension is mounted inside the tube 16 so that the end of the tube 15 forms an opening 18, which is placed in the same surface with the opening 17 for the tube 16.
    The larger dimension tube 16 is connected to a shear thinner apparatus 7, typically a pump, and thus the slurry 8 to be shear thinned is fed through the larger tube 16 into the apparatus 7 by the means by which the shear thinning of the slurry is performed. The tube 16 is provided with a coupling 19 for supplying dilution water to the slurry 8 to be shear thinned. On the other hand, the apparatus 7 is connected to the smaller tube 15, which thus acts as an emptying tube for the shear-thinned material 11 back into the thickener 1. In the tube 15, a restriction valve 12 is arranged to limit the flow area of the shear-thinned material 11 to increase the back pressure of the shear thinning apparatus and also to improve the shear thinning of the material 1 1. The smaller tube 15 is further provided with a coupling 20 through which a part of the shear thinned slurry passes by thickener 1 for further processing. According to Fig. 2, the flow area of the shear-thinned material 11 is limited in that a restriction element 12 is arranged in the tube 15 which has a smaller outer dimension at the end which is connected to the thickening apparatus 1. According to the examples, the fate of the shear-thinned material connects to the restriction element 12 in the tube 4, 15 substantially perpendicular to the wall 2 of the thickening apparatus 1. The openings 3, 4, 15, 16 of the concentric tubes can also be positioned so that the tubes are placed substantially tangentially to the wall of the thickener. When mounting the pipes substantially tangentially into the wall of the thickener, the slurry emptied from the shear thinner will be set in a rotating motion in the emptying space. The pipes can also be directed downwards or upwards in relation to the wall of the thickener if 534,728 more efficient shear thinning is needed near the bottom of the thickener space, for example for more efficient emptying. Although the invention has been described with reference to its preferred embodiments, one skilled in the art may make changes and variations.
    Such changes and variations are considered to fall within the scope of the appended claims.
    权利要求:
    Claims (20)
    [1]
    A method of shear thinning of material containing solid parts, such as slun'y, wherein the material is fed through at least one tube to shear thinner, and emptied back through another tube after shear thinning between a thickening apparatus (1) and the shear thinner apparatus (7), wherein at least one pipes (3,16) for feeding material to be shear thinned and another pipe (4, 15) for emptying back the shear thinned material are placed substantially concentrically to each other at least at the ends connected to the thickening apparatus (1), where the pipes form openings (5, 6, 17, 18) in the thickening apparatus, characterize! by the fact that the shearing effect on the slurry increases by limiting the flow area of the shear-thinned material (1 1) by arranging controllable restriction elements (12) in the tube (4, 15) for emptying back the shear-thinned material (1 1).
    [2]
    Method according to claim 1, characterized in that the flow area of the shear-thinned material (1 1) is limited in that the restriction element (12) is arranged at the end of the tube (4, 15) which is connected to the shear thinner apparatus.
    [3]
    Method according to claim 1 or 2, characterized in that the flow area of the shear-thinned material (1 1) is limited by arranging the restriction element (12) in a part of the tube (4, 15) which is not concentric.
    [4]
    Method according to one of the preceding claims, characterized in that the flow area of the shear-thinned material (11) is limited in that restriction elements (12) are arranged in the tube (4) which has a larger outer dimension at the end which is connected to the thickening apparatus ( 1).
    [5]
    Method according to claims 1-3, characterized in that the flow area of the shear-thinned material (1 1) is limited in that restriction elements (12) are arranged in the tube (15) with a smaller outer dimension at the end which is connected to the thickening apparatus ( 1). 534 728
    [6]
    Method according to one of the preceding claims, characterized in that an emptying line (13, 20) is provided in the pipe (4, 15) between the shear thinning apparatus (7) and the restriction element (12) for emptying at least a part of the shear thinned material (1 1).
    [7]
    Method according to claim 6, characterized in that the amount of emptied material via the emptying line (13, 20) is controlled by the restriction element (12) and the shear thinning apparatus (7).
    [8]
    Method according to claim 1, characterized in that the flow area of the shear-thinned material (1 1) is limited in that the restriction element (12) is arranged in at least partially a part of the tube (4,15) which is concentric.
    [9]
    Method according to one of Claims 1 to 8, characterized in that! that the fate of the shear-thinned material after restriction elements (12) in the tube (4, 15) connects substantially perpendicular to the wall (2) of the thickening apparatus (1).
    [10]
    Method according to one of Claims 1 to 8, characterized in that! that the fate of the shear-thinned material after restriction element (12) in the tube (4, 15) connects substantially tangentially to the wall (2) of the thickening apparatus (1).
    [11]
    11. A method according to any one of claims 1-8, characterized in! that the fate of the shear-thinned material after restriction elements (12) in the tube (4, 15) connects substantially downwards to the wall (2) of the thickening apparatus (1).
    [12]
    Method according to one of Claims 1 to 8, characterized in that the shape of the shear-thinned material after the restriction element (12) in the tube (4, 15) connects substantially upwards to the wall (2) of the thickening apparatus (1).
    [13]
    Device for use in connection with thickening and cloning apparatus for shear thinning of materials containing solid parts, such as slurry, wherein the device contains a tube (3, 16) for feeding material 534 728 to be shear thinned and other tube (4, 15) for emptying back the shear thinned material between a thickening apparatus (1) and the shear thinning apparatus (7), at least one tube (3, 16) for feeding material to be shear thinned and another pipe (4, 15) for emptying back of the shear thinned material are located substantially concentrically to each other at least at the ends connected to the thickening apparatus (1), where the tubes form openings (5, 6, 17, 18) in the thickening apparatus, characterized in that controllable restriction elements (12) are arranged inside the tube (4, 15) for emptying back the shear-thinned material between a thickening apparatus (1) and the shear thinning apparatus (7), to limit by the spreading area of the shear thinned material (1 1), which increases the shear effect on the slurry.
    [14]
    Device according to claim 13, characterized in that the restriction element (12) is arranged in the tube (4) which has a larger outer dimension at the end which is connected to the thickening apparatus (1).
    [15]
    Device according to claim 13, characterized in that the restriction element (12) is arranged in the tube (15) which has a smaller outer dimension at the end which is connected to the thickening apparatus (1).
    [16]
    Device according to claims 13-15, characterized in that the restriction element (12) is arranged at the end of the tube (4, 15) which is connected to the shear thinning apparatus.
    [17]
    Device according to claims 13-16, characterized in that the restriction element (12) is arranged in a part of the tube (4, 15) which is not concentric.
    [18]
    Device according to claims 13-17, characterized in! that the restriction element (12) is a controllable valve.
    [19]
    Device according to Claims 13 to 17, characterized in that the restriction element (12) is a choke. 534 728 10
    [20]
    Device according to Claims 13 to 19, characterized in that an emptying line (13, 20) is arranged between the shear thinning apparatus (7) and the restriction element (12) for emptying a part of the shear thinned material (1 1). Device according to claims 13-15 or 18-20, characterized in that the restriction element (12) is arranged in at least partially a part of the tube (4, 15) which is concentric.
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    CN101432055A|2009-05-13|
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    AP2008004628A0|2008-10-31|
    US20090200244A1|2009-08-13|
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    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    FI20060406A|FI118519B|2006-04-28|2006-04-28|Method and apparatus for shear thinning of materials containing solids|
    PCT/FI2007/000111|WO2007125157A1|2006-04-28|2007-04-27|Method and device for shear-thinning of solids containing material|
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