根据油田注汽锅炉热平衡测算数据及结果分析，找出了其运行热效率低的原因。

Based on calculation results of heat balance of steam injection boiler, this paper finds causes of operational heat efficiency low.

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根据锅炉热平衡基本原理和燃烧理论，建立了基于在线监测参数的飞灰浓度计算模型，模型的计算值与实测值比较接近。

On the basis of the basic theory of boiler thermal balance and combustion theory set up is an online monitored parameters based fly ash concentration calculation model.

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分析了燃煤发热量和炉渣含碳量变化对锅炉固体不完全燃烧热损失的影响，推导出在其他热损失不变的前提下固体不完全燃烧热损失对锅炉热平衡效率的影响。

The influence of calorific value of coal and carbon-content of cinder on the heat loss from solid incomplete combustion of the boiler were analysed in the paper.

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