between the water and the oil and gravitational
vented to the atmosphere from the shell of the
force cause the oil to rise and separate from the
vent condenser.
water.
Detailed procedures for operating and main-
The oily-water separator contains the follow-
taining the waste-heat boiler are furnished by the
ing main elements:
manufacturers' technical manuals, PMS, and
the EOSS. Carefully follow these written
Motor controller
procedures when you are operating or perform-
ing maintenance on the waste-heat boiler.
Motor-driven pump
Pressure vessels
OILY-WATER SEPARATOR
Level detector probes
The oily-water separator assembly processes
the oily waste water by separating the oil from
Pressure and differential pressure gauges
the water. The process is based on the principle
of coalescence. Figure 7-35 shows the general
Liquid level sensor switch
arrangement of the components in the oily-water
separator. Oily water is directed through specially
The pump is a positive-displacement type
constructed filters that provide a surface upon
used to transfer liquid from the oily waste-water
which very small droplets of oil in the water
holding tank to and through the three separating
attach and combine (coalesce) with other oil
stages. Mounted on the suction side of the pump
droplets. When the oil droplets grow to sufficient
is a Y-type strainer to filter out large particles in
size, they are forced off the exterior surface of
the fluid before it enters the first stage of the
the filter by the fluid flow and are separated from
pressure vessels.
the water. The difference in specific gravity
Figure 7-35.--Oily-water separator assembly.
7-36
