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1. 发明授权

US5918569A Pulsed fluidised bed 失效
标题翻译：脉冲流化床
公开(公告)号：US5918569A
公开(公告)日：1999-07-06
申请号：US66997
申请日：1998-04-27
申请人： Tadeusz Kudra , Zbigniew Gawrzynski , Ryszard Glaser
发明人： Tadeusz Kudra , Zbigniew Gawrzynski , Ryszard Glaser
IPC分类号： B01J8/16 , B01J8/40 , F23C10/18 , F26B3/092 , F27B15/10
CPC分类号： B01J8/40 , B01J8/16 , F23C10/18 , F26B3/0926
摘要： An apparatus and method for processing materials in a batchwise or continuous fluidised bed, such as a drier, in which the fluidised bed is subdivided into a plurality of smaller areas, to each of which two separately controlled gas flows are provided. The first lower gas flow is provided to the bed preferably all of the time, and is sufficient at least to maintain the bed in an expanded state. The second higher gas flow is provided to each separate area of the bed in sequence by means of a rotary valve arrangement, and is high enough to induce fluidisation in the bed, but not high enough to induce significant solids loss by entrainment in the offtake gas. The higher flow sequence can be chosen to provide almost any desired sequence to the separate parts of the bed. The sequence can be chosen to induce a travelling wave within the bed which can be across or along the bed, and can be skewed relative to the sides of the bed. In a continuously operated bed, the travelling wave can move either co-currently with, counter-currently to, or cross-currently to, the direction of flow of the solids through the bed. This form of operation, particularly with a skewed travelling wave, improves bed operating efficiency. Since the rotary valve cannot be closed completely, problems associated with abrasive dust in the gas feed, of valve lubrication, and valve differential thermal expansion are all substantially avoided.
摘要翻译：在间歇式或连续流化床（例如干燥器）中处理材料的装置和方法，其中流化床被细分为多个较小的区域，其中每个都提供两个单独控制的气体流。优选地，所有时间都将第一较低气流提供给床，并且至少足以将床保持在膨胀状态。第二较高的气流通过旋转阀装置依次提供给床的每个独立区域，并且足够高以在床中引起流化，但不足够高以通过夹带在排出气体中而引起显着的固体损失。可以选择较高的流动顺序以向床的单独部分提供几乎任何期望的顺序。可以选择该顺序以在床内诱导可以跨过床或沿床的行波，并且可以相对于床的侧面倾斜。在连续操作的床中，行波可以与固体通过床的流动方向共同向前移动，相反地向前移动或横向移动。这种操作形式，特别是偏斜行波，提高了床的操作效率。由于旋转阀不能完全关闭，所以基本上避免了与气体进料中的磨料粉尘，阀润滑和阀差热膨胀有关的问题。

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