飞灰份额选取对固体不完全燃烧热损失的敏感度分析
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摘要
为衡量飞灰份额的取值对固体不完全燃烧热损失数值的影响,本文调研了五个燃煤粉锅炉电厂的试验数据,计算分析了固体不完全燃烧热损失以及供电标准煤耗随飞灰份额变化的规律。结果得出,飞灰含碳量与炉渣含碳量存在差异时,飞灰份额变化对固体不完全燃烧热损失产生影响,固体不完全燃烧热损失随飞灰份额呈线性关系变化,且飞灰含碳量与炉渣含碳量偏差越大,飞灰份额对固体不完全燃烧热损失影响越大;另外,对影响固体不完全燃烧热损失大小的其他因素进行分析,得出燃劣质煤、灰分含量高的煤种时,飞灰份额对固体不完全燃烧热损失的影响偏大;最后分析计算了飞灰份额对固体不完全燃烧热损失和供电标准煤耗的影响程度,飞灰份额变化0.05,固体不完全燃烧热损失变化0.03%~0.13%、供电标准煤耗变化为0.3~1.1 g/kWh。可见,飞灰份额变化对固体不完全燃烧热损失及供电标准煤耗影响较大,在锅炉热效率计算不可简单取值估算。
In order to meature the effect of the unburned carbon heat loss caused by the fly ash ratios,data of five sets different kinds of coal from pulverized coal boiler in the actual operating conditions are used to analyze the influence of fly ash ratios on the unburned carbon heat loss and standard coal consumption of power supply. The result shows when the fly ash carbon content is different from slag carbon content,the change of fly ash ratios will impact he unburned carbon heat loss,and their relationship is linear,and when the deviation of fly ash carbon content and slag carbon content is greater,the impact of fly ash ratios on the unburned carbon heat loss is greater. In addition,analyzing the other factors affecting on unburned carbon heat loss,after analysis,when low quality coal and high ash content of coal are burned,the effect of fly ash ratios on unburned carbon heat loss is larger. Finally,the influence of fly ash ratios on unburned carbon heat loss and standard coal consumption of power supply are calculated and analyzed. When the change of fly ash ratios is 0. 05,the change of unburned carbon heat loss is 0. 03% ~0. 13%,and standard coal consumption of power supply changes 0. 3 ~ 1. 1 g/kWh. Thus it can be seen,the change of fly ash ratios has great influence on unburned carbon heat loss and standard coal consumption of power supply,so it can not be simply estimated in the calculation of the boiler thermal efficiency.
In order to meature the effect of the unburned carbon heat loss caused by the fly ash ratios,data of five sets different kinds of coal from pulverized coal boiler in the actual operating conditions are used to analyze the influence of fly ash ratios on the unburned carbon heat loss and standard coal consumption of power supply. The result shows when the fly ash carbon content is different from slag carbon content,the change of fly ash ratios will impact he unburned carbon heat loss,and their relationship is linear,and when the deviation of fly ash carbon content and slag carbon content is greater,the impact of fly ash ratios on the unburned carbon heat loss is greater. In addition,analyzing the other factors affecting on unburned carbon heat loss,after analysis,when low quality coal and high ash content of coal are burned,the effect of fly ash ratios on unburned carbon heat loss is larger. Finally,the influence of fly ash ratios on unburned carbon heat loss and standard coal consumption of power supply are calculated and analyzed. When the change of fly ash ratios is 0. 05,the change of unburned carbon heat loss is 0. 03% ~0. 13%,and standard coal consumption of power supply changes 0. 3 ~ 1. 1 g/kWh. Thus it can be seen,the change of fly ash ratios has great influence on unburned carbon heat loss and standard coal consumption of power supply,so it can not be simply estimated in the calculation of the boiler thermal efficiency.
引文
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[2]阎维平,译.AMSE PTC 4-1998电站锅炉性能试验规程[S].北京:中国电力出版社,2004.
[3]阎维平,译.AMSE PTC 4-2008电站锅炉性能试验规程[S].北京:中国电力出版社,2011.
[4]中华人民共和国机械电子工业部.GB10184-88电站锅炉性能试验规程[S].北京:中国标准出版社,1988:65.
[5]赵振宁,张清峰.电站锅炉性能试验原理、方法及计算[M].北京:中国电力出版社,2010.
[6]解鲁生,付海明.固体不完全燃烧热损失q4的相关因素分析[J].区域供热,1992(2):27-29.
[7]王晓亮,李成军,于润桥,等.固体未完全燃烧热损失对锅炉热效率的影响[J].化工装备技术,2012,33(4):36-38.
[8]王睿昕.锅炉优化运行问题分析[J].重庆电力高等专科学校学报,2014,19(2):49-51.
[9]杨建华,杨义波,屈卫东,等.循环流化床锅炉机械不完全燃烧热损失的影响因素及测定[J].节能,2002(9):5-8.
[10]吴旸,朱庚富,朱法华.煤粉锅炉飞灰份额影响因素分析[J].电力环境保护,2009,25(2):18-19.
[11]施永红,云峰,魏铁铮.电站锅炉机械不完全燃烧热损失分析方法的研究[J].节能技术,2007,25(5):438-440.
[12]程静.空气分级燃烧技术在电站锅炉节能减排上应用[J].节能技术,2010,28(3):236-239.