摘要
以水为冷却工质,对高温炉渣冷却过程中的过冷沸腾现象进行了研究。从传热学和汽泡动力学的角度分析了汽泡在汽化核心处产生、成长直至脱离等一系列过程,并通过高温炉渣水冷实验,了解到实验条件下炉渣表面过热度、冷却水过冷度以及冷却接触面积对沸腾蒸发量影响的情况。研究表明:随着炉渣颗粒表面过热度的提高,沸腾蒸发量相应增加,并且增加的速率加快;冷却水过冷度与蒸发量变化规律可以较好地用指数关系表示,指数值为-(0.9±0.04);炉渣质量与冷却接触面积近似为1.8倍线性关系。
With water serving as the working medium,studied was the supercooled boiling phenomenon during the water cooling process of slag at a high temperature. From the viewpoint of heat transfer and steam bubble dynamics,a series of such processes as generation and growth of steam bubbles at the cores until separation etc. were analyzed and through the water cooling test of slag at a high temperature,the influence of the slag surface superheating degree, cooling water supercooling degree and cooling contact area on the boiling evaporization capacity was obtained under the test condition. It has been found that with an increase of the superheating degree of the particle surface of the slag,the boiling evaporization capacity will increase accordingly and such a growth rate will increase. The variation law governing the cooling water supercooling degree and the evaporization capacity can be expressed relatively well by an exponential relationship with such an exponential value being-（0. 9 ± 0. 04） and the slag quality and the cooling contact area assuming approximately a 1. 8-times linear relationship.
出处
《热能动力工程》
CAS
CSCD
北大核心
2013年第4期357-362,434,共6页
Journal of Engineering for Thermal Energy and Power
基金
科技部重大专项基金资助项目(2009ZX07104)
关键词
过冷沸腾
表面过热度
过冷度
冷却接触面积
supercooled boiling
surface superheating degree
supercooling degree
cooling contact area
