DOUBLE CONE FOR GENERATION OF A PRESSURE DIFFERENCE

摘要

The lifetime of a double-cone device (21) for creating a pressure difference in a streaming fluid can be greatly increased by moving the inlet gap (5) in to the exit cone (4). This results in a short so-called diffuser (22) being obtained between the gap (5) and the orifice (19), where entry cone (3) and exit cone (4) are connected. The increased lifetime permits the double-cone device to cope with much higher flow rates. Thus higher system pressures are created which enhance the use of the double-cone for such applications as th e desalination of sea water by reverse osmosis. The important application of t he separation of oil from water using a separating device such as a cyclone (57 ) working under elevated pressure is now feasible. The increased power of the double-cone permits one to profit more fully from the new concept of reducti on of the concentration of the feed supplied to the double-cone device (21).