Patent ID: 6163980
Filing Date: 2000-12-26
Classification: C02F,F26B

Abstract:
A method for the continuous dehydration of sludge comprising the steps of:mechanically removing water from the sludge prior to dehydration to obtain a sludge of cutting consistency;mixing the sludge of cutting consistency with heated spheres;dehydrating the sludge of cutting consistency at reduced pressure, wherein due to the contact of the spheres with the sludge, the spheres give off their heat to the sludge, causing water from the sludge to evaporate and the spheres to cool;separating the dehydrated sludge and the cooled spheres from each other;removing the dehydrated sludge;re-heating the cooled spheres with water vapor formed in the dehydration step; andadding the re-heated spheres to fresh sludge to be dehydrated.