流動式顆粒床可用來進行高溫氣體過濾，是發展先進燃煤發電技術或生質能氣化燃燒系統中之重要元件。流動式顆粒床技術發展瓶頸在於過濾床質亦於燃氣進出口葉片間形成滯留區，而導致系統堵塞。解決方案之一為在顆粒床中加入流動校正單元（Flow Corrective Element）。濾材床質之流動性質量測為設計流動式顆粒床葉片與流動校正單元之重要參數。本篇論文以直接剪力測試儀器精密量測實際濾材石英砂之流動性質，包括內摩擦角及其與壁面之摩擦角，並加以分析床質之流動函數與床質/葉片系統之流動因子，從而設計顆粒床流動校正單元配置，並且藉由一套二維過濾顆粒床模型，並搭配不同類型的流動校正單元設計，探討不同流動校正單元對濾材顆粒於顆粒床流動的影響，並且求得可有效消除濾材滯留區之最佳顆粒床配置設計。 Granular moving bed filters and absorbers (GM-BF/A) for hot gas cleanup continue to be developed as a key component of current integrated gasification combined cycle (IGCC) and advanced pressurized fluidized bed combustion (PFBC) power generation systems. The main difficulty in employing this technology is the existence of residential areas of filter granules. The placement of flow corrective elements based on the flow properties is proposed as a good solution to diminish the residential areas. The measurements of flow properties, including the pure sand and the mixture of sand and fly ash are described. Meanwhile, the specific flow function and the flow factor of filter media derived from the flow properties will be evaluated as well to design the louver systems according to different requirements, then observing and analyzing the flow patterns in two-dimensional experimental apparatus to define the optimum louver-flow corrective element configuration.
