Automatic oily water discharge system for ballast water storage tank

摘要: The invention discloses an automatic oily water discharge system for a ballast storage tank. comprises liquid level transmitter which is installed on the top of tank, pressure and oil electric valve are at opening, inlet lifting pump connected to PLC control system, wherein receives detection signals from sensor, calculates obtain values thickness h2 sewage layer h3 layer, compares with set h discharge, controls valve, start stop according comparison result. disclosed by can be used automatically discharging sewage, simple operate free potential safety hazards reducing manual operating amount enhancing treatment efficiency.