Abstract: After #1 and #2 boilers of Huadian Qingdao Power Generation Corporation Limited putting into operation, the efficiency of induced draft fan was lower, and its energy consumption was higher all the while. In minor overhaul period at 2008, the #2 induced draft fan had been reformed by authorized Xian Thermal Power Research Institute. The test after reformation indicated that the efficiency of induced draft fan had been increased by 15%～20%, the energysaving effect was very obvious.

Key words: adjustable stationary blade, axial flow induced draft fan, energy-saving reformation, performance test