Output header for hydrocyclones with concentric accept outlets.

摘要

A bank of hydrocyclones 10 fed tangentially from a supply header 11 are used to separate a pulp suspension for papermaking. High density solids are ejected from the reject opening 14 while the bulk of the mixture passes through the accept opening 17 and enters an accept header nipple 20. Here the central air core 16 and a small amount of liquid are withdrawn by central nipple 25 to compartment 23 of header 21 and thence to outlet 27 which is under partial vacuum. The desirable accept flow enters compartment 22 of the header and is withdrawn for further processing. Also described is a three-compartment header, for a single or double bank of hydrocyclones, in which the third compartment carries the supply flow which is axially fed and set in rotation by spiral vanes.