Abstract
Bilge and oily water (BOW) during vessel’s operation are the most
large-tonnage type of waste and for their treatment all ships, in
accordance with regulatory requirements [14], have to be equipped
with special equipment – oily water separators. At sea vessel’s
operating conditions three main directions of BOW cleaning are now used:
physical, chemical and biological. The analysis of BOW separation
methods based on these three directions has shown that it is very
difficult to obtain secondary petrochemical products. In the article
authors offer a new method for BOW separation which is based on the use
of a hydrodynamic process of supercavitation with artificial ventilation
of the cavitational cavern. With local origin in the flow of a
supercavitating cavern, there will always be saturated water vapor
inside of it. The process of permanent water vapor selection from the
cavern will ultimately contribute to the production of highly
concentrated mixture of secondary petroleum products from initial
mixture of BOW. During the study of BOW separation process it was found
that decreasing of the working pressure inside the working chamber of
the cavitation separator have to be always compensated by an increase in
the temperature of the processed multiphase flow.