【摘要】 在高温差示扫描量热差热分析 (DSC- DTA)实验基础上 ,对垃圾焚烧飞灰熔融过程进行研究 ,建立飞灰熔融动力学模型 .在惰性气氛 (N2 )和氧化气氛 (O2 )下 ,2 0～ 14 5 0℃的温度对两种垃圾焚烧飞灰的熔融过程进行研究 ,实验采用了三种温升速率 (5、10、2 0℃ / min) ,并研究了 Ca O添加剂对飞灰熔融的影响 .飞灰熔融过程包含干燥脱水、多晶转变和熔融相变三种反应 ,脱水发生在 10 0～ 2 0 0℃ ,多晶转变发生在 4 80～ 6 70℃ ,熔融发生在 1136～12 31℃ ,在 1174℃达到峰值 .提出了垃圾焚烧飞灰熔融的 0级反应动力学 ,并得到飞灰熔融反应表观活化能 .更多还原

【Abstract】 In this work,the melting process of MSWI (municipal solid waste incineration) fly ash was studied by high temperature DSC DTA experiments performed under temperature range of 20～1 450℃, and some other parameter variables including atmosphere (O 2 and N 2), heating rates(5℃/min,10℃/min,20℃/min) and CaO addition. Two samples of MSWI fly ash used in the experiment were collected from a power station in southern China and the Rouen power station in France respectively. Three main transitions were observed during the melting process of fly ash: dehydration, polymorphic transition and fusion, occurring in the temperature range of 100～200℃, 480～670℃ and 1 101～1 244℃, respectively. Finally, a zero order kinetic model of fly ash melting reaction was established and the apparent activation energy of MSWI ash melting was obtained.更多还原