本研究針對鼓泡式流體化床氣化爐建立三維多相流之熱流場模型，考慮氣化爐內之化學反應進行數值模擬，並加以使用實驗驗證模型之準確度，在確認模型之準確度後，針對氣化爐之氣化性能進行參數分析，探討當量比、蒸氣燃料比、邊界熱傳條件、進口空氣溫度以及初始床高對於氣化反應性能之影響。在模型的建立方面，首先運用達梭公司所開發的Solidworks軟體進行三維流場模型繪製，ANSYS Workbench進行網格的建置，再使用Fluent進行多相流以及化學反應的模擬計算。模擬的結果可以了解到氣化爐會在當量比下降時，能夠產生出更多的可燃氣體，其中包括一氧化碳、甲烷及氫氣。如果在反應中加入蒸氣，可以更有利於氫氣以及甲烷的產生。另外，若是改變氣化爐之邊界熱傳條件，因為溫度的流失，會對整體的產氣性能造成些許的影響，其中對一氧化碳的產生有著最大的影響。而若是針對進口溫度進行改變，在模擬的結果中，也顯示出空氣的預熱可以大幅提升氣化爐的可燃氣產量。

The framework of theoretical method is three dimensional model with Eulerian-Eulerian multiphase model couple with chemical reaction process. And for the validation of the numerical result, will build a bubbling fluidized bed gasifier system for the experiment, and use experimental result to validate the numerical model. Will carry out parametric analysis for the gasification performance of the gasifier, and discuss the effect of equivalence ratio, steam-fuel ratio, boundary heat transfer conditions, air-inlet temperature and initial static bed height on gasification process. The 3D model will be built with Solidworks software, and ANSYS Workbench is used to build the mesh, then using Fluent to simulate the multiphase flow and chemical reaction. The simulation results show that when the equivalence ratio decreases, the gasifier can produce more flammable gases. If steam is added to the gasifier, it can generate more hydrogen and methane. If the boundary heat transfer conditions of the gasifier are changed, the loss of temperature will have a slight impact on the overall gas production performance, which the production of carbon monoxide has the greatest impact. If the inlet temperature is changed, the simulation results also show that the preheating of air can greatly improve the combustible gas production of the gasifier.

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