GB1227128A - - Google Patents

Abstract

1,227128. Centrifugal separators. PORTATEST MFG. Ltd. 23 April, 1968 [24 April, 1967], No. 19067/68. Heading B2P. In a vertical centrifugal separator for separating liquid and gas, Fig. 1, a baffle 4 in the form of a flat solid disc mounted on a tubular support 17 is disposed between a separation chamber 2 and a liquid collection chamber 3. The downwardly spinning vortex of separated gas is prevented by the baffle from entering the chamber 3 and is discharged through a vortex finder 7 while separated liquid collected on the wall of the chamber 2 passes through the gap 18 into the chamber 3. The baffle may alternatively be dished, conical or skirted. The vortex finder is made of two parts interconnected by channel-shaped members 30 and having between them an annular gap 31 communicating with a suction chamber 27 which in turn communicates, via a conduit 19 and openings 21 and 20 in the tubular support 17 and the baffle 24 respectively, with the centre of the gas vortex so that any liquid particle entrained in the vortex finder is sucked out through the gap 31 with some of the gas and recirculated into the separation chamber. A skirted baffle 37 is provided on the vortex finder to prevent any liquid creeping down the vortex finder tube from entering the mouth 13 thereof. A splash disc 40 may, as shown, be disposed in the collection chamber 3 to stop the downward helical flow of separated liquid as it enters the chamber 3, the liquid flowing through openings 41, Fig. 3, in the disc so that any gas entrained in the liquid is concentrated at the top of the chamber 3 and finds its way back into chamber 2. Plates 44 depending from the disc 40 serve to isolate the newly admitted liquid creating a quiescent zone between them. A liquid level float mechanism may be threaded in an outlet 46 to regulate the liquid discharge through an outlet 8, the float being conveniently located in the quiescent zone between the plates 44. Relative dimensions of the different parts are given.