本文以设计再热蒸汽温度为 623 ℃的 1 台 660 MW 机组、1 台 1 000 MW 机组和 1 台1 000 MW二次再热机组为研究对象,综合分析了造成再热蒸汽温度偏低的原因,并有针对性地进行了优化调整.优化后,再热蒸汽温度均有较大程度的提升,660 MW机组和1 000 MW 一次再热机组再热蒸汽温度分别由调整前的 609.0 ℃和 599.8 ℃提高至618.0 ℃和619.8 ℃,1 000 MW二次再热机组高/低压高温再热蒸汽温度分别由调整前的603.4 ℃和601.4 ℃提高至612.5 ℃和612.7 ℃;同时,末级再热器管壁温度高低点的偏差也有所降低.该研究结果可为同类型机组再热器管壁温度的优化调整提供参考.%This paper takes a 660 MW unit,a 1 000 MW unit and a 1 000 MW double reheat unit with reheat steam temperature of 623 ℃ as research object.The causes of low reheat steam temperature are comprehensively analyzed.And the targeted optimization and adjustment are carried out.After optimization,the reheat steam temperature are greatly increased.The reheat steam temperatures of 660 MW unit and 1 000 MW unit are increased from 609.0 ℃ and 599.8 ℃ to 618.0 ℃ and 619.8 ℃,respectively.The reheat steam temperatures of high and low temperature reheater of 1 000 MW unit are increased from 603.4 ℃ and 601.4 ℃ to 612.5 ℃and 612.7 ℃,respectively.At the same time,the deviation of high and low temperatures of final reheater tube wall are decreased.This results provide references for the optimization and adjustment of unit reheater tube wall temperature of the same type unit.
展开▼
