Abstract
Treatment about bilge water is always one key point of the ship pollution prevention, at present, separation accuracy of the separator on board can reach requirements of specification for sea-going ships pollution prevention, but the separation of quantity and convenience of operation aspects are still to be improved. The ship oily water dynamic hydrocyclone separator can both meet to the above two aspects. The thinking of structure design and the manufacturing and assembly are discussed. The main structure of ship oily water dynamic hydrocyclone separator and its working principle are introduced. The basic parameters of the device working conditions are provided. The new method onboard ship oily water treatment is put forward. It can be used as references for researchers on oily water disposal.
Highlights
There are two ways of producing bilge water on board, one is from the maintenance, leakage in engine room; the other is from ballast water in oil tank, cleaning water in ballast tank and washing oil tank
Through the prototype experiment shows that the separation accuracy through the oily water dynamic hydrocyclone separator with auxiliary filter adsorption method can meet the requirements of MARPOL73/78 convention and the amount of separation and convenience of operation can be improved well
Cheng Xiang-xin et al.: Research on Structure Design of Dynamic Hydrocyclone on Board Ship hydrocyclone is provided by liquid itself, it needs to have through the pressure loss of fluid itself to accomplish, the enough inlet pressure, so the separation efficiency is obtained pressure loss is relatively large [2]
Summary
There are two ways of producing bilge water on board, one is from the maintenance, leakage in engine room; the other is from ballast water in oil tank, cleaning water in ballast tank and washing oil tank. According to the requirements of the MARPOL73/78 convention, it must be installed bilge water treatment plant on board, and the oil content in discharged water from ship to the sea through separator must not exceed 15 PPM[1]. "Gravity - coalescence combination" and "filter - coalescence combination" oily-water separator are mostly installed on ship at present. The separation accuracy can meet the requirements of MARPOL73/78 convention, but its processing flow and convenience of operation should in need of improvement. Water dynamic hydrocyclone separator was developed by our scientific research team. Through the prototype experiment shows that the separation accuracy through the oily water dynamic hydrocyclone separator with auxiliary filter adsorption method can meet the requirements of MARPOL73/78 convention and the amount of separation and convenience of operation can be improved well.
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