Method and system for blowing off floating ice in ballast water tank through hot air of marine engine room

The invention relates to a method and a system for blowing off floating ice in a ballast water tank by using hot air in a marine engine room. The method comprises the following steps that impurities in the hot air in the marine engine room are filtered, and the hot air is blown into the ballast water tank by using an air blower so that ballast water forms eddy current; therefore, water in the water ballast space is prevented from being frozen, and floating ice which is possibly generated is further melted through the hot air. The method is advantaged in that the temperature of the ballast tank and the temperature of ballast water in the ballast tank are increased through air waste heat in the marine engine room, so the anti-icing effect is achieved, low-grade heat in the marine engine room can be effectively utilized in the deicing mode, and therefore ship energy utilization efficiency is improved, and emission is reduced. 本发明涉及一种利用船舶机舱热空气吹除压载水舱浮冰的方法及系统，上述方法为滤除船舶机舱内热空气中杂质后再利用鼓风机将其吹入压载水舱中，以使压载水形成涡流，从而避免压载水舱中水结