| 摘要 |
<p>The method and apparatus for washing papermaker's stock comprised of waste paper products having suspended, undesirable solids and fines includes the pre-thickening the stock on a mat-forming, low turbulence thickener (20) in which very little of the fines is lost during thickening, re-dilution the pulp from the pre-thickener and applying the re-diluted stock to the inlet of the headbox of a high speed, high turbulence belt-type washer (10) to wash out the undesirable solids while retaining a substantial portion of the fines content in the washed stock. The belt-type washer has a belt speed up to 6,000 feet per minute or more. The clear water effluent from the pre-thickener is used for re-dilution, and a portion of the white water effluent from the belt-type washer may be recirculated directly to the washer inlet or a clarified portion thereof may be recirculated, or both.</p> |
