Other

National Research Development Corporation

Derek A Colman

Martin T Thew

Cyclone separator

A cyclone separator for removing oil from seawater, the oil being up to a few percent of the volume, is proportioned as follows, symbols having the meaning shown on the Figure, a notable feature being the smallness of d.sub.o, the overflow: 10.ltoreq.1.sub.2 /d.sub.2 .ltoreq.25; 0.04&lt;4A.sub.i /.pi.d.sub.1.sup.2 .ltoreq.0.10; d.sub.o /d.sub.2 &lt;0.1; d.sub.1 &gt;d.sub.2 ; d.sub.2 &gt;d.sub.3. The half-angle of the convergence of the taper T.sub.2 is from 20' to 2.degree..

A cyclone separator for the separation of lighter material (i.e. discontinuous or dispersed phase) can cope with fluctuating proportions of lighter material in the feed stream. A retractable plug 15 at the place where the cyclone overflow outlet meets the cyclone body has a bore 16 forming the effective overflow outlet. The plug is retracted while the cyclone separator is in operation, in response to sensors, to offer a larger outlet 12 as the need arises.

A cyclone separator for removing oil from seawater, the oil being up to a few percent of the volume, is proportioned as follows, symbols having the meaning shown on the FIGURE, a notable feature being the smallness of d.sub.o, the overflow: 10.ltoreq.1.sub.2 /d.sub.2 .ltoreq.25; 0.04&lt;4A.sub.i /.pi.d.sub.1.sup.2 .ltoreq.0.10; d.sub.o /d.sub.2 &lt;0.1; d.sub.1 &gt;d.sub.2 ; d.sub.2 &gt;d.sub.3. The half-angle of the convergence of the taper T.sub.2 is from 20' to 2.degree..

A cyclone separator having a generally cylindrical first portion with a plurality of substantially equally circumferentially spaced tangentially directed feeds, and, adjacent to the first portion and coaxial therewith, a generally cylindrical second portion open at its far end, the first portion having an axial overflow outlet opposite the second portion, the internal diameter of the first portion being d.sub.1, and of the second portion being d.sub.2, and of which the internal length of the first portion is L.sub.1 and of the second portion is L.sub.2, the total cross-sectional area of all the feeds measured at the point of entry normal to the inlet flow being A.sub.i, the shape of the separator being governed by the following relationships:

A cyclone separator having a generally cylindrical first portion with a plurality of tangentially directed feeds, and, adjacent to the first portion and coaxial therewith, a generally cylindrical second portion open at its far end, the first portion having an axial overflow outlet opposite the second portion, the second portion opening at its far end into a coaxial generally cylindrical third portion, the internal diameter of the axial overflow outlet being d.sub.0, of the first portion being d.sub.1, of the second portion being d.sub.2 and of the third portion being d.sub.3, the internal length of the first portion being l.sub.1 and of the second portion being l.sub.2, wherein the total cross-sectional area of all the feeds measured at the points of entry normal to the inlet flow is A.sub.i and wherein the shape of the separator is governed by the following relationships:

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Lordswood, Southampton SO1 8EX, United Kingdom

Derek A Colman