煤渣的导热蓄热性能及改性研究  

Thermal storage properties and modification of coal slag

作　　者：赵文敬 李和平[1] 汪洋 景妮洁 徐江荣[1] ZHAO Wen-jing;LI He-ping;WANG Yang(Institute of Energy,Hangzhou Danzi University,Hangzhou 310018,China;Institute of IndustrialTechnology Transformation,Zhejiang University,Hangzhou 310027,China)

机构地区：[1]杭州电子科技大学能源研究所,浙江杭州310018 [2]浙江大学工业技术转化研究院,浙江杭州310027 [3]杭州电子科技大学能量利用系统与自动化研究所,浙江杭州310018

出　　处：《能源工程》2018年第5期44-49,共6页Energy Engineering

基　　金：浙江省基础公益研究计划资助项目(LGG18E060004);浙江省自然科学基金青年资助项目(LQ14E060004)

摘　　要：利用激光导热仪和差式扫描量热仪(DSC)对温州电厂煤渣样品的比定压热容和导热系数进行测试,研究煤渣的蓄热和导热性能,及煤渣中添加铁粉和水泥对样品热性能的影响。实验结果显示:煤渣、铁粉质量比为6∶4时,相较于纯煤渣,比定压热容由1. 13 kJ/(kg·K)增加到50. 91 kJ/(kg·K),导热系数由0. 18 W/(m·K)增加到10. 78 W/(m·K)。当煤渣铁粉样品中水泥的添加量为0. 03 g时,比定压热容为49. 89 kJ/(kg·K),导热系数为8. 18 W/(m·K)。研究结果表明:煤渣中添加铁粉大幅度增加了煤渣的蓄热和导热性能,而水泥的加入在一定程度上降低了煤渣铁粉样品的导热性能,从而提高了煤渣作为太阳能光热发电蓄热材料的可能性。本实验可为蓄热材料的选择及性能改进提供参考。Thermal conductivity and specific heat capacity of the Wenzhou power plant were tested by laser pyrometer and differential scanning calorimetry （DSC）. The heat and thermal conductivity of coal slag and the influence of iron powder and cement on the thermal properties of samples were studied. The experimental results showed that when the cinder/iron powder was 6 ∶ 4,the specific heat capacity was increased by 1.13 kJ/（kg· K） to 50.91 kJ/（kg· K）,and its thermal conductivity increased from 0.18 W/（m· K）to 10.78 W/（m· K）.When the adding amount of cement was 0.03 g, sample of cinder/iron powder heat storage performance was 49.89 kJ/（kg · K） and the performance of thermal conductivity was 8.18 W/（m·K）. This showed that adding iron powder in the cinder greatly increased the thermal storage and thermal conductivity of the cinder, while the addition of cement reduced the thermal conductivity of the sample of cinder/iron powder to a certain extent, thereby increasing the possibility of using the coal cinder as the thermal storage material of the solar thermal power generation, and provided the experimental basis and theoretical basis for the selection and performance improvement of the thermal storage material.

关 键 词：蓄热材料 煤渣 铁粉 水泥 热性能 

分 类 号：TK513.5[动力工程及工程热物理—热能工程]