摘要
由于超临界发电技术高参数、高效、低排、节能的优点,使得超临界锅炉成为当今中国发电行业发展的主要方向.为防止在锅炉运行中发生水冷壁超温爆管的现象,本文以某1000 MW超临界塔式锅炉中的流体工质及水冷壁为研究对象,考虑锅炉的工质流动传热及其与水冷壁管的耦合作用,分别研究了在75%和50%BMCR两种工况下的流量偏差与进口温度偏差对壁温的影响.研究表明管壁的最高温度点皆出现在管子出口处,此处恰好是水冷壁螺旋管圈与竖直水冷壁管焊缝处,其材料受热的临界强度比正常值要低,故流量偏差的允许范围更低。
The advantages of high parameter,high efficiency,low emission and energy conservation of supercritical power generation technology,the supercritical boilers become the major direction of power generation industry in China.To prevent the phenomenon of overheating pipe in the water wall tube on the supercritical tower boiler,this paper is focus on study of working medium and water wall tube based on 1000MW supercritical tower type boiler.The effects of flow deviation and import temperature deviation on wall temperature under 75% and 50% BMCR conditions were studied respectively.Considering the impact of work medium flowing and heat transferring for water wall tube in boiler.The results show that the highest temperature will be at outlet of water wall tube where the spiral pipe wall and the vertical water wall jointed,the critical strength of the material heating is lower than normal,so the flow deviation of the allowable range is lower.
作者
郝小红
彭辉
马溢
马达夫
王子龙
HAO Xiao-Hong;PENG Hui;MA Yi;MA Da-Fu;WANG Zi-Long(School of Energy and Power Engineering,University of Shanghai for science and technology,Shanghai 200093,China)
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2018年第12期2727-2731,共5页
Journal of Engineering Thermophysics
基金
上海市浦江人才计划(No.18PJ1408900)
关键词
超临界锅炉
流量偏差
温度偏差
壁温
supercritical boiler
flow deviation
temperature deviation
wall temperature
