基于水动力计算的锅炉出口温度及热负荷分布分析
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摘要
为了精确掌握电站锅炉高温受热面出口区域的温度,给出了水动力计算流程,测定了管壁温度分布,并根据原有出口温度分布状态计算出炉膛宽度方向上的热负荷分布。研究结果得到:在炉膛宽度方向上并未形成连续的热负荷分布。热负荷分布状态和炉内燃烧过程紧密关联,在锅炉燃烧过程中,会由于风量或粉量分布不均匀的情况等因素导致热负荷出现偏差。根据热力与锅炉水动力计算数据推断出下炉膛水冷壁管出口温度,发现实际测量值和计算值基本一致,表现出相同的温度分布规律。
In order to accurately master the temperature of the outlet area of the high-temperature heating surface of the power station boiler,the hydrodynamic calculation process is given,the temperature distribution of the pipe wall is measured,and the thermal load distribution in the width direction of the furnace is calculated according to the original temperature distribution state of the outlet.The results show that there is no continuous thermal load distribution in the width direction of furnace.The distribution state of thermal load is closely related to the combustion process in the furnace. In the combustion process of the boiler,the thermal load will deviate due to such factors as uneven distribution of air quantity or powder quantity.According to the calculation data of heat and boiler hydrodynamic power,the outlet temperature of the water wall pipe in the lower furnace is inferred.
In order to accurately master the temperature of the outlet area of the high-temperature heating surface of the power station boiler,the hydrodynamic calculation process is given,the temperature distribution of the pipe wall is measured,and the thermal load distribution in the width direction of the furnace is calculated according to the original temperature distribution state of the outlet.The results show that there is no continuous thermal load distribution in the width direction of furnace.The distribution state of thermal load is closely related to the combustion process in the furnace. In the combustion process of the boiler,the thermal load will deviate due to such factors as uneven distribution of air quantity or powder quantity.According to the calculation data of heat and boiler hydrodynamic power,the outlet temperature of the water wall pipe in the lower furnace is inferred.
引文
[1]陈有福,徐颂梅,管诗骈,等.炉膛火焰中心位置与下水冷壁出口壁温关系研究[J/OL].热力发电,2018(6):71-77.
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[10]葛学利,张忠孝,范浩杰,等.热偏差和流量偏差对1000MW超超临界锅炉水冷壁壁温影响的研究[J].中国电机工程学报,2018,38(8):2348-2357,2544.
[11]牟春华,杨征,赵新宝,等.超超临界锅炉用HR3C耐热钢的研究进展[J].热加工工艺,2018,47(2):23-27,32.
[12]刘建斌,乌晓江.IGCC废热锅炉工程结构特性研究[J].锅炉技术,2017,48(4):6-10.
[2]李慧梅,桂智勇,苏丰舟,等.基于热经济学模型的烧结余热双压锅炉操作参数优化[J].热能动力工程,2018(5):99-103.
[3]伏喜斌.红外热像技术在锅炉节能检测中的应用[J].能源与环境,2018(2):57-59.
[4]范旭宸,陈晔,郑雄,等.600MW超临界循环流化床锅炉水冷壁热应力分析[J].动力工程学报,2018,38(4):253-257.
[5]赵朋山.燃用准东煤电站锅炉炉膛热负荷的选取研究[J].锅炉技术,2018,49(2):12-16.
[6]沈倩,肖杰,杨红权,等.一种确定锅炉沿炉膛宽度方向热负荷分布的方法[J].电力工程技术,2018,37(3):1-6.
[7]邹堃,车凌云,李峰,等.超临界锅炉螺旋管圈水冷壁热负荷在线监测的研究[J].锅炉技术,2018,49(1):17-21.
[8]丁小骄,黄明明,张哲巅,等.过量空气系数、热负荷及反应物混合模式对天然气锅炉柔和燃烧特性影响[J].中国电机工程学报,2017,37(7):2016-2024.
[9]李东鹏,刘利军,刘家利,等.高海拔地区660MW机组锅炉热负荷参数选取[J].热力发电,2016,45(4):111-115,120.
[10]葛学利,张忠孝,范浩杰,等.热偏差和流量偏差对1000MW超超临界锅炉水冷壁壁温影响的研究[J].中国电机工程学报,2018,38(8):2348-2357,2544.
[11]牟春华,杨征,赵新宝,等.超超临界锅炉用HR3C耐热钢的研究进展[J].热加工工艺,2018,47(2):23-27,32.
[12]刘建斌,乌晓江.IGCC废热锅炉工程结构特性研究[J].锅炉技术,2017,48(4):6-10.
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