Patent ID: 8956272
Filing Date: 2015-02-17
Classification: B01D,B04B,C02F

Abstract:
1. A method of cleaning liquid suspensions comprising: providing a decanter centrifuge having a bowl rotatable about an axis, a rotatable screw disposed within the bowl, a discharge chamber located at one end of the bowl for receiving solids separated in the bowl, a rotatable scraper disposed within the discharge chamber, a first drive mechanism for rotating the bowl and screw, a second drive mechanism independent from the first drive mechanism for rotating the scraper; the method including feeding a tarry or resinous liquid suspension into the rotatable bowl, separating tarry or resinous solids from the liquid contained in the suspension and discharging the solids from the bowl into the discharge chamber, and preventing fouling of the discharge chamber by rotating the scraper independently of the bowl and screw at a speed sufficient to scrape the solids from the discharge chamber.