一种新的酸露点计算式及其现场实验验证

A noval acid dew point calculation formula and its field experiment verification

烟气酸露点是制约深度余热回收技术的重要因素,准确预测该数值对避免低温腐蚀、降低排烟热损失及提高锅炉效率有重要意义。在对几种常用酸露点计算式分析比较的基础上,采用最小二乘法对相关实验数据进行拟合后得到拟合式,通过理论计算及近年来相关学者现场测量数据对相关公式进行对照分析,并使用自行设计的酸露点测量装置对本文提出的计算式的计算数值进行了验证。结果表明,本文提出的计算式计算数值分布范围更加合理,当SO3体积分数低于20 mL/m3时具有更高的计算精度。

The acid dew point of flue gas is an important factor that restricts deep waste heat recovery technology. Accurate prediction of this value is of great significance for avoiding low temperature corrosion, reducing heat loss of flue gas and improving boiler efficiency. Based on the analysis and comparison of common calculation formulas of acid dew point, the least square method is used to fit the relevant experimental data to obtain the fitted formula, which is analyzed through theoretical calculation and field measurement data of relevant scholars in recent years. The calculation results of the formula proposed in this paper are verified by using self-designed measurement device of acid dew point. The result shows that the formula proposed in this paper not only has a more reasonable range of numerical prediction, but also has higher accuracy than others when the volume fraction of SO3 is below 20 mL/m^3.