Abstract:

Taking the transformation of flue gas system in 600 MW unit of a power plant as an example, the feasibility of “combining two into one”retrofit for boiler induced draft fan and desulfurization booster fan were discussed from two aspects of economy and safety, the technical scheme of “combining two into one” retrofit for fan was proposed, including design principles, design parameters, the layout optimization and design pressure calculation of flue channel. The implementation of this technical scheme can reduce the flue gas system resistance and the engineering quantity of transformation, and then it can save the investment of transformation, improve the equipment energy efficiency, as well as the safety and reliability of unit, and finally can provide reference for similar transformation projects.

Key words: induced draft fan, booster fan, flue gas bypass, “combining two into one&rdquo, retrofit of fan