康科伟,施子福,李培,周永刚
KANG Kewei,SHI Zifu,LI Pei,ZHOU Yonggang

• 1:浙江浙能乐清发电有限责任公司
• 2:浙江大学能源清洁利用国家重点实验室

摘要(Abstract)：

针对某发电厂参与深度调峰、机组负荷段拓宽并且40%~50%负荷段燃烧优化为空白的情况,通过试验找出机组在该负荷段运行状态,分析机组存在的问题,并针对问题进行燃烧优化调整,结果表明:在40%~50%负荷段,再热汽温低于设计值下限10~30℃,280 MW和260 MW的SCR入口NO_X浓度分别高达476.3 mg/m~3和432.6 mg/m~3,高于设计值(350 mg/m~3),优化后再热汽温及锅炉效率平均提高7.2℃和0.25%,折算后煤耗降低0.941 g/k Wh,NO_X降低62.1 mg/m~3。最终确定锅炉在该负荷段的运行方案,可为今后机组实现该负荷段的自动控制提供依据。
In view of the fact that a power plant is involved in deep peak regulation and the expansion of the load section of the unit, and combustion optimization in the 40%~50% load section is blank, first of all, the operation state of the unit in the load section is tested by experiment, and the existing problems of the unit are analyzed; then, according to the problems the combustion optimization adjustment is carried out. The result shows that in the load section of 40%~50% the reheat steam temperature is lower than lower limit of the design value of 10~30℃, the NO_X concentrations of SCR entrance of 280 MW and 260 MW are respectively up to 476.3 mg/m~3 and 432.6 mg/m~3, higher than the design value of 350 mg/m~3, After optimization, the reheat steam temperature and boiler efficiency are increased by 7.2℃ and 0.25% respectively, which means coal consumption can be reduced by 0.941 g/k Wh, and NO_X reduced by 62.1 mg/m~3. The operation program of the boiler in the load section is determined, which provides basis for automatic control of the load section in the future.

关键词(KeyWords)： 深度调峰;超低负荷;燃烧优化;再热汽温;NO_X浓度;煤耗
deep peak regulation;ultra-low load;combustion optimization;reheat steam temperature;NO_X concentration;coal consumption

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 康科伟,施子福,李培,周永刚
KANG Kewei,SHI Zifu,LI Pei,ZHOU Yonggang

DOI: 10.19585/j.zjdl.201805010

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