大型湿式冷却塔系统湿量平衡分析与计算*
Moisture balance analysis and calculation of large wet cooling tower systems
摘要：
针对燃煤火电厂、钢铁厂等行业大型湿式冷却塔蒸发损失带来的工业余湿量过大使得出塔空气含湿量增大、造成空气环境恶劣等问题，以燃煤火电厂湿式冷却塔系统为例，对出塔空气含湿量的来源进行了分析。根据物质守恒和能量守恒等基本定律，建立了湿量计算的基本模型。计算了出塔空气含湿量的关键组成部分，即不同工况下产生的工业余湿量，并与系统实际运行产生的工业余湿量数据进行了分析比较。结果表明，正常工况下，通过理论分析计算得到的湿式冷却塔系统的湿量与实际运行时的湿量较吻合。所建立的湿式冷却塔系统湿量计算模型既可用于燃煤火电厂冷却塔系统的运行优化，又能减少湿式冷却塔系统蒸发带来的工业余湿量，降低对周围空气质量的影响。
Abstract：
The excessive industrial residual humidity caused by the evaporation loss of large wet cooling tower leads to moisture content increase of tower outlet air and poor air environment in coal-fired power plant or steel plant. Taking the wet cooling tower system of a coal-fired power plant as an example, analyses the source of moisture content of tower outlet air. According to the basic laws of mass conservation and energy conservation, establishes the basic model for moisture content calculation. Calculates the key components of moisture content of tower outlet air, that is, the industrial residual humidity under different operating conditions. Compares the calculated data with the actual operating data, and the result shows good consistency. The moisture content calculation model of wet cooling tower system can be used for optimizing the operation of this system of coal-fired power plant and reducing the industrial residual humidity caused by the evaporation of this system to lower the impact on surrounding air quality.
Keywords:wet cooling tower system, air moisture content, evaporation loss, industrial residual humidity, calculation model