CAJ | 학술논문

针对大容量四角切圆燃煤锅炉普遍存在的烟气侧速度与温度偏差以及过热器的汽温偏差，对北疆电厂1000MW锅炉实测运行数据进行了分析，并对炉膛流场进行了模拟．结果表明：由于四角切圆锅炉炉膛上部残余旋转导致气流在屏区左右两侧形成流动差异，在折焰角前后两侧汽温偏差的分布规律截然不同．通过对电厂锅炉后屏过热器与末级过热器之间管道布置形式的调整（由交叉改为平行），使两级受热面的吸热偏差相互抵消，从而提高减温器的调节性能．
침대대용량사각절원연매과로보편존재적연기측속도여온도편차이급과열기적기온편차，대북강전엄1000MW과로실측운행수거진행료분석，병대로당류장진행료모의．결과표명：유우사각절원과로로당상부잔여선전도치기류재병구좌우량측형성류동차이，재절염각전후량측기온편차적분포규률절연불동．통과대전엄과로후병과열기여말급과열기지간관도포치형식적조정（유교차개위평행），사량급수열면적흡열편차상호저소，종이제고감온기적조절성능．
To solve the unbalance problems of gas velocity and temperature distribution and the steam temperature deviation of superheater, frequently existing in large tangential firing boilers, an analysis has been performed on actual operation data of a 1 000 MW boiler in Beijiang Power Plant, while a simulation carried out on the in-furnace flow field. Results show that the gas flow fields are different at both sides of screen tubes due to the residual rotation existing in upper part of the furnace, and the steam temperatures near the baffle angle are differently distributed at both sides. By changing the arrangement of pipes between the rear screen superheater and final superheater of boiler (from cross into parallel), the heat absorption deviation between two stages of heating surfaces are offset, which helps to improve the regulation performance of relevant attemperators.