Abstract: The technical route and application effects of high-efficiency super-clean waste heat recovery 95+ technology in the fired heater of a refinery were introduced. The cores of the technology lies in the fuel gas purification system and the fuel gas-airdouble parallel heat exchange system,as well as the two-stage air preheater arrangement. The results of application in many units showed that 95+ technology could meet the requirements of design index and had considerable economic and social benefits.It couldbe used as a reference for energy-saving and emission reduction in similar types of units or other fired heaters in future.

Key words: fired heater, low temperature, dew point corrosion, waste heat recovery technology, CFD numerical simulation