Simulation and optimization research of nitrogen filling and corrosion prevention for heat recover boiler of gas-steam combined cycle unit
Gas-fired generating units are playing an increasingly important role in the power mix as a highly efficient and clean way of generating electricity.However,there are problems such as long startup and shutdown time and equipment corrosion during the startup and shutdown process of gas units,which restricts their peak shifting capability and increases the power generation cost of enterprises.The application effect of wet nitrogen filling maintenance in the rapid startup process of waste heat boilers of gas generating units was investigated through simulation experiments.The experimental results show that nitrogen filling maintenance can reduce the dissolved oxygen content in water,slow down the corrosion rate of the equipment,and provide better protection for the equipment.In addition,controlling the environmental pH to maintain a neutral or slightly alkaline environment also proved to be an effective corrosion control strategy.In summary,this study provides experimental and theoretical basis for adopting the nitrogen-filled maintenance strategy during the rapid start-stop process of gas generator sets,and provides guidance for optimising the maintenance strategy,reducing the corrosion risk and protecting the stable operation of the equipment.
gas turbinenitrogen purgingrapid startupcorrosion controlenvironmental pH value
万方数据
维普
