| 摘要 |
An oil and water mixture is fed under pressure to a lower chamber wherein any free oil rises to the upper part for discharge through an oil outlet while an emulsion of remaining oil and water is displaced upwardly through a baffle and a coalescing bed into an upper chamber having an upper outlet for coalesced oil and a lower outlet for separated water. To clean the coalescing bed, the mixture feed to the lower chamber is interrupted and the liquid level in the chambers is lowered to a region of the coalescing bed, after which gas is delivered under pressure to the liquid in the lower chamber so as to cause bubbling of the liquid in the bed, whereby dirt trapped therein is freed. The liquid level is then raised as the bubbling action continues, so that the dirt-containing liquid can be discharged from the upper chamber.
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