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METHOD AND APPARATUS FOR WASHING PULP BY MEANS OF INTENSIFIED SUCTION

机译:用强力抽吸法洗涤纸浆的方法和装置

摘要

A method and an apparatus for washing a solids-containing suspension by means of a suction drum washer comprising a drum provided with a filtration surface, a main vacuum source such as a drop leg and washing tubes connected to the frame of the suction drum washer. A washing liquid stream is introduced by a first washing tube is directed to contact the pulp layer on the surface of the drum in a point below 10 degrees after the surface of the suspension and a vacuum of at least 0.1 bar greater than the main vacuum source, i.e. intensified suction is applied by means of a separate vacuum source to filtering surface at the contacting point of the first liquid stream and the pulp layer or maximum of 10 degrees before the contacting point. The intensified suction may be utilized also for boosting end of filtration stage (II) and drying stage (IV). Filtrate from the drying stage (IV) can be used at the same washer as a washing liquid at the first or the second washing tube.
机译:一种用于通过抽吸鼓式洗衣机洗涤含固体的悬浮液的方法和设备,该抽吸鼓式洗衣机包括设置有过滤表面的鼓,主真空源(例如滴管)和连接到抽吸鼓式洗衣机框架的洗涤管。通过第一洗涤管引入洗涤液流,使其在悬浮液表面之后的10度以下的点接触滚筒表面上的纸浆层,并且真空度比主真空源大至少0.1 bar在第一液体流和纸浆层的接触点处或在接触点之前最多10度处,通过单独的真空源将过滤器表面施加“强力抽吸”作用,即加强抽吸。增强的抽吸也可以用于提高过滤阶段(II)和干燥阶段(IV)的结束。来自干燥阶段(IV)的滤液可在与第一或第二洗涤管中的洗涤液相同的洗涤器中使用。

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