| 摘要 |
<p>Method for processing crushed fibrous stalks containing pith, to separate the pith and the fiber, comprising gravity feeding fragments of the said stalks into the upper end of a vertical screening element, simultaneously feeding an aqueous carrier liquid either concurrently or separately in amounts sufficient to provide at least about 4.5 parts by weight of carrier liquid (e.g., water) per part by weight (dry weight basis) of fiber in the crushed fibrous stalks, centrifugally and helically propelling and gravity feeding the fragments through the treating zone defined by the screening element, in the absence of any extraneous artificially created air pressure differentials, so that a layer of axially aligned oriented fragments is formed on the inner surface of the screening element and the pith is separated by the rolling and rubbing action of the fragments on each other, and the separated pith particles which become relatively heavier due to absorption of carrier liquid are forced to the exterior of the screening element by centrifugal forces applied.</p> |
