Centrifugal separator

Details Centrifugal separator Centrifugal separator

B - Operations, Transporting

04

B

233/22

B04B 1/14 (2006.01)

Patent

CA 1144126

ABSTRACT OF THE DISCLOSURE This invention relates to centrifugal separators of the kind having sludge ports at the rotor periphery to be opened dur- ing operation and separate outlets for separated heavier liquid phase and separated lighter liquid phase. To reduce the losses of valuable lighter liquid phase during total discharge or partial discharge of the separator by opening the sludge ports, the centrifuge is provided with an overflow device connected to the heavy phase outlet, said overflow device having an inner annular overflow and also having a number of passages at a larger di- ameter than the inner overflow border. the passages are dimen- sioned to let through all heavier liquid phase in normal opera- tion but not to let through an increased amount of heavier liquid phase fed to the separator just before opening the sludge ports for the purpose of displacing the interface between the heavier and the lighter liquid phase towards the rotor axis to a level that corresponds to said inner overflow border. In order to push the interface between the liquid phases inwards before discharge, no other action is therefore needed than an additional supply of the heavier liquid phase.

359695

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