Li Rundong, Wang Lei, Yang Tianhua, Raninger Bernhard
Institute of Clean Energy and Environmental Engineering, Liaoning Key Laboratory of Clean Energy, Shenyang Institute of Aeronautical Engineering, Shenyang 110136, China.
Waste Manag. 2007;27(10):1383-92. doi: 10.1016/j.wasman.2006.11.017. Epub 2007 Mar 7.
The melting process of MSWI (Municipal Solid Waste Incineration) fly ash has been studied by high-temperature DSC-DTA experiments. The experiments were performed at a temperature range of 20-1450 degrees C, and the considerable variables included atmosphere (O(2) and N(2)), heating rates (5 degrees C/min, 10 degrees C/min, 20 degrees C/min) and CaO addition. 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 degrees C, 480-670 degrees C and 1101-1244 degrees C, respectively. The apparent heat capacity and heat requirement for melting of MSWI fly ash were obtained by DSC (Differential Scanning Calorimeter). A thermodynamic modeling to predict the heat requirements for melting process has been presented, and it agrees well with the experimental data. Finally, a zero-order kinetic model of fly ash melting transition was established. The apparent activation energy of MSWI fly ash melting transition was obtained.
通过高温差示扫描量热法（DSC）-差示热分析法（DTA）实验研究了城市固体废弃物焚烧（MSWI）飞灰的熔化过程。实验在20-1450℃的温度范围内进行，主要变量包括气氛（O₂和N₂）、升温速率（5℃/min、10℃/min、20℃/min）和CaO添加量。在飞灰熔化过程中观察到三个主要转变：脱水、多晶转变和熔化，分别发生在100-200℃、480-670℃和1101-1244℃的温度范围内。通过差示扫描量热仪（DSC）获得了MSWI飞灰的表观热容和熔化热需求。提出了一种预测熔化过程热需求的热力学模型，该模型与实验数据吻合良好。最后，建立了飞灰熔化转变的零级动力学模型。获得了MSWI飞灰熔化转变的表观活化能。
