超超临界垂直管圈锅炉水冷壁汽温偏差及节流圈调整方案研究  

Analysis on the Steam Temperature Deviation of the Vertical Water Wall and the Adjustment Plan of the Throttle Ring for an Ultra-supercritical Boiler

作　　者：杨浩昱 张西容 李维腾 杨冬[1] 王永杰[2] 宋宝军[2] 夏良伟[2] YANG Haoyu;ZHANG Xirong;LI Weiteng;YANG Dong;WANG Yongjie;SONG Baojun;XIA Liangwei(State Key Laboratory of Multiphase Flow in Power Engineering,Xi'an Jiaotong University,Xi'an 710049,China;Harbin Boiler Company Limited,Harbin 150046,China)

机构地区：[1]西安交通大学动力工程多相流国家重点实验室,西安710049 [2]哈尔滨锅炉厂有限责任公司,哈尔滨150046

出　　处：《动力工程学报》2023年第5期526-534,662,共10页Journal of Chinese Society of Power Engineering

基　　金：国家重点研发计划资助项目(2022YFB4100303);国家自然科学基金资助项目(52076172)。

摘　　要：为解决660 MW超超临界锅炉垂直管圈水冷壁汽温存在偏差、温度波动大和水冷壁出现横向裂纹等问题,进行了试验研究和水动力计算。根据锅炉设计方案,建立了某电厂锅炉流动网络系统的水动力计算数学模型,并在锅炉水冷壁上铺排工质温度测点;根据实炉测量数据,对1号机组270 MW负荷时炉内热负荷和热偏差的分布进行了计算分析;然后调整了节流圈的布置方案,计算调整后的水动力和流动不稳定性。结果表明:调整后出口汽温更加均匀,调整后的方案能更好地防止汽温波动,且不会发生脉动;节流圈调整后中高负荷下的垂直管圈水冷壁汽温分布更均匀,汽温偏差问题明显改善。Experimental research and hydrodynamic calculation were carried out to solve the problems of deviation in steam temperature,large temperature fluctuation and the transverse cracks in the lower furnace water wall of a 660 MW ultra-supercritical boiler.According to the boiler design scheme,a hydrodynamic calculation mathematical model for the boiler flow network system was established,and the temperature test points were arranged on the water wall.Based on the actual furnace measurement data of the steam temperature,the heat load and thermal deviation distribution in the unit 1 furnace at 270 MW load was calculated.Then the arrangement of the throttle ring was adjusted,and the adjusted hydrodynamic and flow instability was calculated.Results show that the outlet steam temperature is more uniform and the adjustment can prevent steam temperature fluctuation without pulsation.At the same time,the steam temperature distribution of the lower furnace water wall at medium and high loads is more uniform after the throttle ring adjustment,and the temperature deviation is significantly improved.

关 键 词：超超临界 锅炉水冷壁 汽温偏差 汽温波动 水动力特性 流动不稳定性 节流圈 

分 类 号：TK224.2[动力工程及工程热物理—动力机械及工程]