由於能源日漸短缺，生質能源利用變得更為重要。生質物電漿氣化系統是一項極具潛力的生質物發電方式，目前核能研究所正大力研發。該系統均使用生質物質（如都市廢棄物），產生高溫高壓之氣體，但是在進入氣渦輪機前必須有效除塵，方能使系統有效運作。流動式顆粒床過濾器淨化高溫氣體是一項方案，但是過濾床一直存在著濾材靜止區形成，而造成系統堵塞之問題。過去幾年研究，我們已經發展了顆粒床內置入系列之流動校正單元，有效解決此問題。不過，將該系統商業化，尚有許多問題需要解決。本計畫即將針對流動式顆粒床整體過濾系統實務應用發展設計相關次系統，包括濾材粉塵篩分系統、進風口風速導流系統等。計畫第一年將建立濾材篩分系統，包括振動器、篩網及紀錄裝置，此系統可調整篩網格子的配置，並評估濾材破損效應對過濾床的影響。第二年則將研究利用導流板建立進風口的分流機制，導流板為可調整角度之設計，以找出各組過濾自由面最佳的過濾效率設計方案，確定系統的確能有效達到更高的過濾效率。計畫第三年將依據前二年的實驗結果，進行冷性能測試，冷模測試項目以過濾床之實際過濾效率與燃氣穿透過濾床的壓降隨時間變化為主，氣體進口速度、煙塵濃度、濾材循環流率、濾餅厚度與尺寸都是影響因素。最終希望製作三維熱模測試模型，實際通入含煙塵氣體（結合核研所之電漿氣化系統），測試整體過濾效率。三年目標是建立可為商業化之高溫流動式顆粒床過濾系統。 ; It is very important to utilize biomass energy due to the decrease of fossil energy. The biomass gasification system for plasma has been developed for the generation of electricity in Institute of Nuclear Energy Research (INER) at present. The biomass material is adopted in this system. High temperature gases are generated during the gasification the biomass. The high temperature gases contain many dust particulates and fly ashes which should be filtrated before entering gas turbine. The moving granular bed used for filtration of the hot gas is one important apparatus under development. When the filter granules move downwards through the vertical channel, they may stop between two louvers and form a stagnation zone. The dust particulates are attached to the filter granules when the hot gas enters the filter. However the gas entrance may be plugged and the filter efficiency would decrease remarkably. Putting a series of flow corrective elements has been proven to be a good solution to remove the stagnant zones and has been patented by our research group. However there still remain some systematic problems. This project tries to develop moving granular bed of the dust/filter granules separation system and gas inlet system to get better filtration performance. The first year project will develop the dust/filter granules separation system. The system includes vibrator, screen mesh and record subsystem. The screen mesh should be adjusted. The influence of breakage efficiency of filter granules in the filter system will be evaluated. In the second year, we will develop the gas inlet system by carefully designing the appropriate louver blades. The louver blades will be designed to adjust the geometry. The filtration efficiency will be measured via cold test model. The results will be used to design the geometry of louver blades in the gas inlet apparatus. The complete increase of filtration efficiency must be achieved by the filter system. According to results of the first two years, the project will build a new 3D cold test facility and perform the cold test. The cold test includes the filtration efficiency and the pressure drop of the dust gases. The circulation rate, the concentration of the dust gases and the material and sizes of the filter granules are important factors. The cold test results will provide industry the important design information for building a prototype for the hot test model. With the progress of this project, we wish the design rules for the commercialized moving granular bed filter can be developed. ; 研究期間 9701 ~ 9712
