STEAM SERVICE SYSTEM USING SURPLUS STEAM OF WASTE HEAT RECOVERY SYSTEM

摘要

The present invention relates to a steam supply system using surplus steam of a waste heat recovery system (WHRS), which can reduce operating costs not by throwing out surplus high pressure steam and low pressure steam used in the WHRS but by supplying the surplus steam to equipment at a proper pressure, can reduce material costs by reducing the capacity of an exhaust gas economizer because of using the surplus steam of the WHRS, and can reduce the capacity of the relevant heater by dividing a 3.5 bar steam system from a 7 bar steam system for a separate composition. The steam supply system using surplus steam of a WHRS comprises: a G/E exhaust gas economizer (110) which heats feedwater using waste heat of the exhaust gas of a generator; an auxiliary boiler (120) which generates high pressure steam by receiving the heated feedwater from the G/E exhaust gas economizer (110) in order to supply the high pressure steam to equipment (1) as necessary through a first steam line (160); an M/E exhaust gas economizer (130) which heats feedwater using waste heat of the exhaust gas of a main engine; a HP steam separator (140) which generates high pressure steam by receiving the heated feedwater from the M/E exhaust gas economizer (130) in order to supply the high pressure steam to the first steam line (160) through a second steam line (170); and an LP steam separator (150) which generates low pressure steam by receiving the heated feedwater from the M/E exhaust gas economizer (130) in order to supply the low pressure steam to equipment (2) as necessary through a third steam line (180).