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1. 发明授权

US06221266B1 Variable capacity continuous extended area filter 有权
标题翻译：可变容量连续扩展区域过滤器
公开(公告)号：US06221266B1
公开(公告)日：2001-04-24
申请号：US09225675
申请日：1999-01-06
申请人： Arnold E. Wilkie , Michael W. Felber , Jeffrey S. Haggard , Mark R. Miller
发明人： Arnold E. Wilkie , Michael W. Felber , Jeffrey S. Haggard , Mark R. Miller
IPC分类号： B01D3512
CPC分类号： B29C47/081 , B01D29/117 , B01D29/52 , B01D29/608 , B01D35/12 , B01D35/18 , B29C47/0009 , B29C47/0815 , B29C47/68
摘要： A molten polymer filtration assembly includes at least three independently controllable and removable filter housings which extend from a common inlet passage to a common outlet passage, thereby providing parallel flow paths for polymer filtration. Each of the filter housings includes an inlet valve controlling the flow of polymer from the inlet passage, an outlet valve controlling the flow of polymer to the outlet passage, and a filtration passage which extends between the inlet and outlet valves and houses a candle-type filtration element. When the inlet and outlet valves are opened, the filter housing is on-stream and allows polymer to flow from the inlet to the outlet passage. Each filter housing is individually controllable, and can be set in an on-stream state independent of the state of any of the other filter housings, such that any number of filter housings can be on-stream at a given time. By setting the number of on-stream filter housing in correspondence with the polymer flow rate, the polymer residence time can be maintained in a relatively narrow range of durations over a wide range of polymer flow rates, thereby ensuring that the polymer residence time within the filtration system remains below an acceptable duration and that the polymer residence time is regulated to avoid significant fluctuation or variances in the polymer residence time. Interlocks prevent the closure of the outlet valve of each filter housing unless the inlet valve for that housing is closed. Removal of any filter housing is prevented unless its valves are both closed.
摘要翻译：熔融聚合物过滤组件包括至少三个独立可控和可移除的过滤器壳体，其从公共入口通道延伸到公共出口通道，由此提供用于聚合物过滤的平行流动路径。每个过滤器壳体包括控制聚合物从入口通道流动的入口阀，控制聚合物流到出口通道的出口阀，以及在入口阀和出口阀之间延伸的过滤通道，并且容纳蜡烛型过滤元件。当入口和出口阀打开时，过滤器壳体在流动并允许聚合物从入口流到出口通道。每个过滤器壳体是可单独控制的，并且可以独立于任何其它过滤器壳体的状态设置在直流状态，使得任何数量的过滤器壳体可以在给定时间在流动。通过设置与聚合物流速相对应的流动过滤器壳体的数量，聚合物停留时间可以在宽的聚合物流速范围内保持在相对窄的持续时间范围内，从而确保聚合物停留时间在过滤系统保持低于可接受的持续时间，并且调节聚合物停留时间以避免聚合物停留时间的显着波动或变化。联锁防止每个过滤器外壳的出口阀关闭，除非该外壳的入口阀关闭。防止任何过滤器外壳的拆卸，除非其阀都关闭。

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