HEAT RECOVERY STEAM GENERATOR AND METHOD OF OPERATION

摘要

A heat recovery steam generator (14) has a housing (16) defining a horizontally oriented exhaust gas stream (13). The exhaust gas stream (13) passes through a first heat recovery unit (24) having horizontally oriented heat transfer tubes (25) and forced circulation of a heat transfer fluid therethrough. The exhaust gas stream (13) then is passed through an air pollution control assembly (30) having a catalyst for reduction of exhaust emissions. The exhaust gas stream (13) is subsequently passed through a second heat recovery steam generator (26) having vertically oriented heat transfer tubes (33) and natural circulation therethrough.