简介：Themaintechnologiesforreducingfluegasheatlossofpulverizedcoal-firedboilersareintroduced,andthesuitabilityofthesetechnologiesforboileroperationandtheprinciplesforselectionofthesetechnologiesareexplored.Themainconclusionsare:1)thenon-equilibriumcontroloverfluegasflowratesattheinletoftheairheaterandthereversalrotationoftheairheaterrotatorshouldbepopularizedasregulartechnologiesinlargeboilers;2)increasingtheareaoftheairheatertoreducethefluegasheatlossinpulverizedcoal-firedboilersshouldbethetopoptionandincreasingtheareaoftheeconomizerbethenextchoice;3)low-pressureeconomizertechnologycouldsaveenergyunderspecialconditionsandshouldbecomparedwiththetechnologyofincreasingeconomizerareaintermsoftechnicaleconomicswhenthelatterisfeasible;4)thehotprimaryairheaterisonlysuitabletothepulverizingsystemwithalargeamountofcoldairmixed.