Research and Application of Sealing Reformation Technology of Rotary Air Preheater in Coal-Fired Boiler
The air leakage transformation of rotary air preheaters has become a mature option for energy-saving and tapping potential in various thermal power plants.In response to the current situation where the leakage rate of the rotary air preheater in the 2×350 MW supercritical circulating fluidized bed boiler of Shuozhou Thermal Power Co.,Ltd.has exceeded 15%since its commissioning in early 2020,and based on the energy-saving and emission reduction requirements under the"double carbon"goal,research and upgrading of the three-way sealing structure are urgently needed.Through the rolling flexible contact sealing transformation of the#2 boiler rotary air preheater,the air leakage rate of the air preheater under various loads has been reduced to below 6%,effectively solving problems such as current fluctuations,wear of sector plates,and corrosion of cold end seals,significantly improving the safety,reliability,and economy of unit operation.
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