Cyclone separator with oppositely directed separating chambers

Details Cyclone separator with oppositely directed separating chambers Cyclone separator with oppositely directed separating chambers

1989-06-01

1991-04-23

Dawson, Robert A.

Liquid purification or separation

Tangential flow or centrifugal fluid action

554591, 209144, 209211, B01D 17038

Patent

active

050097849

DESCRIPTION:

BRIEF SUMMARY
This invention relates generally to cyclone separators for separating multiphase mixtures such as, for example, oil/water mixtures.
Cyclone separators generally comprise an elongated separating chamber having a feed inlet proximate to one end and in most cases an overflow outlet at that end and an underflow outlet at the other end. The overflow outlet is normally adapted for removing the less dense phase and the underflow outlet for removing the more dense phase. One of the problems associated with the efficiency of cyclone separators is the presence of secondary flow due to the end wall at the overflow outlet end which tends to slow down the spin velocity and thus provide areas of low resistance flow from the outer regions of high pressure to the inner regions of low pressure.
It is an object of the present invention to provide an improved cyclone separator which has an improved efficiency.
According to the present invention there is provided a cyclone separator comprising elements designed, sized and arranged for treating a mixture of fluids for separating at least in part a more dense component of a mixture from a less dense component thereof, the cyclone separator being characterized by a separating chamber having a central axis of symmetry between opposite first and second ends, the separating chamber including two parts and an intermediate portion which is intermediate said ends between said parts, the intermediate portion being of greater cross sectional dimension than either of the opposed ends, the separating chamber having first outlet means for discharging one of the separated phases and second outlet means for discharging the other of the separated phases the separator further including feed inlet means proximate to the intermediate portion.
Preferably the intermediate portion is of generally cylindrically form.
Preferably the first outlet means is defined by the free ends of the two parts of the separating chamber.
In one form the second outlet means comprises a pair of collector tubes each being at least partially disposed within a respective part of said separating chamber one end of each tube receiving a separated phase of the mixture and discharging it from the other end. Preferably the tubes are co-axial with the longitudinal axis of the separating chamber.
In another form the second outlet means comprises intake ports opening towards respective parts of the separating chamber and a take-off tube for discharging the separated phase from the chamber. Preferably the second outlet means comprises a collector tube arranged generally parallel to or co-axial with the longitudinal axis of the separating chamber the ports being defined by the opposite ends of the collector tube. The collector tube may be operatively connected to the take-off tube so as to form a generally T-shaped member.
Preferably each part of the separating chamber comprises a primary portion adjacent the intermediate portion; a secondary portion of generally conical shape and a tertiary portion of generally cylindrical shape.
In one form the tertiary portion is curved along the longitudinal axis thereof so that the two ends are joined to a common discharge outlet.
Preferred embodiments of the invention will hereinafter be described with reference to the accompanying drawings in which:
FIG. 1 ia a schematic view of a cyclone separator taken along the axis thereof according to the invention;
FIG. 2 is a schematic detail of a section of the separator shown in FIG. 1;
FIG. 3 is a schematic view of the section shown in FIG. 2 viewed in the axial direction;
FIG. 4 is a diagrammatic view of the system incorporating a cyclone separator according to the invention;
FIG. 5 is a schematic view of another form of cyclone separator according to the invention; and
FIG. 6 is a schematic view of yet another form of cyclone separator according to the invention.
The cyclone separator generally indicated at 1 comprises a separating chamber 3 comprising two parts 4 and 5 with an intermediate portion 7 between the two parts 4 and 5 having ends 6 a

REFERENCES:
patent: 1919653 (1933-07-01), Hill
patent: 2236629 (1941-04-01), Parker
patent: 2301371 (1942-11-01), Corwin
patent: 2915369 (1959-12-01), Oaks et al.
patent: 3259246 (1966-07-01), Stavenger
patent: 4237066 (1980-12-01), Colman et al.
patent: 4244708 (1981-01-01), Bielefeldt
patent: 4473478 (1984-09-01), Chivrall
patent: 4657678 (1987-04-01), Kuhasalo et al.
patent: 4721565 (1988-01-01), Carroll et al.

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