热力发电
熱力髮電
열력발전
THERMAL POWER GENERATION
2014年
11期
126-131
,共6页
超超临界机组%锅炉%热力计算%再热器%换热损失
超超臨界機組%鍋爐%熱力計算%再熱器%換熱損失
초초림계궤조%과로%열력계산%재열기%환열손실
ultra supercritical unit%boiler%thermodynamic calculation%reheater%heat loss
受外循环影响,超超临界机组锅炉有多种热力计算流程。运用3种不同的锅炉热力计算流程分析了A电厂锅炉的再热器欠温问题,提出了末级再热器改造方案。改造后,再热蒸汽温度明显升高,末级再热器工质升温幅度由76℃提高到98℃,弥补了炉膛出口温度低于设计值引起的末级再热器换热损失。
受外循環影響,超超臨界機組鍋爐有多種熱力計算流程。運用3種不同的鍋爐熱力計算流程分析瞭A電廠鍋爐的再熱器欠溫問題,提齣瞭末級再熱器改造方案。改造後,再熱蒸汽溫度明顯升高,末級再熱器工質升溫幅度由76℃提高到98℃,瀰補瞭爐膛齣口溫度低于設計值引起的末級再熱器換熱損失。
수외순배영향,초초림계궤조과로유다충열력계산류정。운용3충불동적과로열력계산류정분석료A전엄과로적재열기흠온문제,제출료말급재열기개조방안。개조후,재열증기온도명현승고,말급재열기공질승온폭도유76℃제고도98℃,미보료로당출구온도저우설계치인기적말급재열기환열손실。
By taking a boiler in power plant A as an example,thermodynamic calculation process of the ultra supercritical boilers was analyzed.Affected by the external circulation,the ultra supercritical boilers have a variety of calculation processes.Three calculation processes were employed to investigate the insufficient reheater steam temperature of the boiler,and a transformation scheme for the final reheater was put for-ward.Check calculation for performance parameters of the retrofitted boiler was carried out,under three conditions with different gas components.The results show that,after the modification,the reheater steam increased dramatically and the temperature rise of the reheater working fluid increased from 76 ℃ to 98 ℃. This transformation scheme compensates the heat transfer loss in the final reheater caused by low furnace outlet temperature.
