逆流喷雾式饱和器内湿化过程的实验研究

Experimental Study of a Humidifying Process in a Counter-flow Spray Saturator

对逆流喷雾式饱和器内部空气的湿化过程进行实验研究,实验中不仅测量了饱和器进出口湿空气的相对湿度、温度和水的温度,而且也测量了饱和器内部几个高度截面上湿空气的相对湿度和气相、液相的温度。根据实验测量的湿空气的相对湿度和温度,计算出了饱和器内湿空气的含湿量和测量高度间湿空气的加湿量。由实验结果可见,随水气质量比的增大,饱和器出口湿空气的温度和温升也相应增大。湿空气的含湿量和水的蒸发量、出口温度随进口水温升高、水气质量比增大而增大。在所有实验工况下,饱和器出口湿空气接近或达到饱和。随空气速度增大水滴逃逸量增大。总体上饱和器内部下部主要是加湿进口空气,上部是加湿和加热空气。

An experimental study was conducted of the humidifying process of air in a counter-flow spray saturator. During the study measurements were taken not only of the relative humidity and temperature of the humid air and water temperature at the saturator inlet and outlet, but also of the humid-air relative humidity and the temperature of gas and liquid phase of the sections at several levels of height within the saturator. On the basis of experimentally measured humid air relative humidity and temperature calculated was the humidity content of the humid air within the saturator and the added humidity of humid air between the levels of height being measured. From the experimental results it can be seen that with an increase in water-gas mass ratio, there will be a corresponding increase in humid air temperature and temperature rise at the outlet of the saturator. The humidity content of the humid air and the evaporation rate of water and outlet temperature will increase with an increase in inlet water temperature and water-gas mass ratio. Under all experimental conditions the humid air at the saturator outlet approaches or has attained saturation. With an increase in air speed there will be an increase in escaped quantity of water droplets. Viewed as a whole, within the saturator humidified inlet air predominates at the lower portion with the upper portion being occupied by humidified and heated air.