锅炉炉渣淬火后含渣水的表面蒸发  

An investigation of water quenched solution surface evaporation by the high-temperature slag of a power station

作　　者：何川[1,2] 王延军[1,2] 龙天渝[3] 

机构地区：[1]重庆大学低品位能源利用技术及系统教育部重点实验室,重庆400044 [2]重庆大学动力工程学院,重庆400044 [3]重庆大学城市建设与环境工程学院,重庆400044

出　　处：《重庆大学学报（自然科学版）》2013年第6期35-39,共5页Journal of Chongqing University

基　　金：科技部国家重大专项资助项目(2009ZX07104-002)

摘　　要：对水冷式除渣系统中含渣水表面蒸发速率进行实验,探讨了含渣水表面蒸发速率的影响因素,得到了1个大气压下风速为0.5m/s时,含渣水表面蒸发速率与表面温度(30～75℃)和相对湿度(40%～90%)之间的实验关联式。实验测量了按不同比例稀释的含渣水表面蒸发速率,并与纯水表面蒸发速率的实验结果对比,发现实验范围内水温高于50℃时纯水表面蒸发速率约为含渣水表面蒸发速率的1.1～1.2倍,水温低于50℃时倍数略高,而一定范围内浓度的改变对含渣水表面蒸发速率的影响在10%以内。Slag water surface evaporation phenomenon exists in the system of water cooling slag removal.The authors study the relationship between slag water（which is from the JINJIE power plant in Shaanxi）surface evaporation rate and the relative humidity（40%~90%）and the water surface temperature（35-75 ℃）,which at an atmospheric pressure and the wind speed is 0.5 m/s,and then obtains an empirical equation.The experiment measures three kinds of concentrations of the slag water surface evaporation rate,and compares the measuring results with those of the pure water surface evaporation rate at the same experimental conditions.According to the comparison results,the authors analyze underlying causes of slag water evaporation from the thermodynamic point of view,that is surface temperature and composition and content changed the surface free energy,thus affects the slag water surface evaporation rate.It is found that water surface evaporation rate is 1.1~1.2 times of the rate of slag water when the temperature is over 50 ℃,while the water surface evaporation rate is slightly higher than that of slag water when the temperature is lower than 50 ℃,and the slag water surface evaporation rate changes in 10% in a certain concentration range.

关 键 词：含渣水 表面蒸发速率 实验关联式 

分 类 号：TS251.44[轻工技术与工程—农产品加工及贮藏工程]