Abstract: Abstract:The current situation of boiler flue gas waste heat recovery in domestic power plants was introduced. The reasons of higher temperature of boiler flue gas in power plants were analyzed. The domestic current lowpressure economizer scheme, which is helpful to reduce the flue gas temperature and to recover the flue gas waste heat, was expounded, and the matters needing attention were pointed out.

Key words: Key words:waste heat in exhaust gas, lowpressure economizer, Hshaped fin, anticorrosion coating