WASTE HEAT RECOVERY UNIT FOR A SHIP AND METHOD FOR RECOVERYING WASTE HEAT

摘要

The present invention relates to a method and a device for recovering waste heat of a vessel engine and, more specifically, to a method and a device for recovering waste heat of a vessel engine, wherein the device for recovering waste heat of a vessel engine includes: an economizer supplying overheated steam to a steam turbine generator by heat-exchanging water supplied from a waste supply tank and the waste heat in exhaust gas generated in the engine; and a second overheated steam supply line including an auxiliary boiler changing saturated steam, which is generated by using water supplied from the water supply tank, into the overheated steam and supplying the changed overheated steam to the steam turbine generator. According to the present invention, the device for recovering waste heat of a vessel engine can prevent a wing of the steam turbine generator from being damaged due to condensed water generated when saturated steam is supplied, by supplying the steam generated by an auxiliary boiler when a vessel is anchored and drives in a low load to the steam turbine generator in order to generate power and by converting the saturated steam generated by the auxiliary boiler to the overheated steam and supplying the converted overheated steam. Also, the device for recovering waste heat of a vessel engine can reduce installation costs thereof and has simplified composition since the auxiliary boiler substitutes an auxiliary generator engine to generate the power by assisting a main engine of an existing vessel.