CAJ | 학술논문

采用燃烧器上摆和附加风上摆角度偏差设置的方法来降低锅炉烟温偏差和再热蒸汽温度偏差。对一台700 MW四角切圆燃烧锅炉不同燃烧器上摆角度条件下的炉内燃烧过程进行了数值模拟，模拟结果与试验值符合较好。燃烧器上摆角度增加，炉内气流的旋转动量矩和屏区入口的残余旋转动量矩减小，水平烟道内烟气速度和温度偏差降低。附加风上摆角度的偏差设置可降低屏区入口的残余旋转动量矩，进而减小烟气速度和温度偏差。燃烧试验表明，燃烧器上摆11°和附加风上摆角度的偏差设置10°可将再热蒸汽温度偏差由20℃左右降低至4℃以下，是一种有效降低烟气和再热蒸汽温度偏差的手段。
채용연소기상파화부가풍상파각도편차설치적방법래강저과로연온편차화재열증기온도편차。대일태700 MW사각절원연소과로불동연소기상파각도조건하적로내연소과정진행료수치모의，모의결과여시험치부합교호。연소기상파각도증가，로내기류적선전동량구화병구입구적잔여선전동량구감소，수평연도내연기속도화온도편차강저。부가풍상파각도적편차설치가강저병구입구적잔여선전동량구，진이감소연기속도화온도편차。연소시험표명，연소기상파11°화부가풍상파각도적편차설치10°가장재열증기온도편차유20℃좌우강저지4℃이하，시일충유효강저연기화재열증기온도편차적수단。
The burner tilting up and the bias setting of AA tilting up angle was employed in order to reduce the temperature deviation of flue gas and reheat steam. The combustion processes in a 700 MW tangentially fired boiler with different burner tilting up angles were numerically simulated. The simulated results were fitted in with the measured data well. For greater burner tilting up angle, the swirling momentum moment in the furnace and the residual swirling momentum moment in the entrance of platen zone were reduced, while the flue gas deviation in the horizontal flue gas pass was lower. The bias setting of AA burner tilting up angle can reduce the flue gas residual swirling momentum moment of the entrance of platen zone considerably and lower the deviation of the flue gas temperature and velocity. The combustion tests showed that as an effective measures to reduce the temperature deviation of flue gas and reheat steam of this boiler, the burner tilting up for 11° and the bias setting of AA tilting up angle for 10° can reduce the temperature deviation of reheat steam from 20℃to about 4℃.