摘要 近十年來，美日歐等先進國家均積極投入對流動式顆粒床廢氣淨化系統之研發。含煙塵之廢氣經由進出入口兩側葉片進入垂直流動式顆粒床內，煙塵物質攔阻於床內之顆粒，達到廢氣淨化之目的，但濾材在顆粒床中會有靜止區形成，造成系統堵塞。 目前已成功的葉片-阻礙物設計方法，可有效消除濾材靜止區。本研究將以現有三維實驗裝置為基礎，加裝廢氣煙塵產生裝置，觀察染塵濾材之流動形態，並進行實際冷性能測試，冷性能測試項目以過濾床之實際過濾效率與廢氣穿透過濾床的壓力降隨時間變化為主，濾材循環流率、進風口風速與廢氣所堆積的濾餅都是影響因素。 依據先前冷性能測試結果，除了搭配濾餅的效果來尋出最佳過濾效率外，再配合穩定的壓降與粒徑分析結果，提供設計實際雛形之依據，並於未來能實際與產業界結合。 Abstract The moving bed filtration technology used for high-temperature gas cleanup has been developed in United States, Japan and countries of EU in last decades. One of the key difficulty is the formation of stagnant zones of filter granules. When stagnant zones exist, the dusts coming with flue gas may plug the system and the filtration efficiency decreases remarkably. Putting inserts into the convergent channel between louvers was proven to be an appropriate solution to diminish the stagnant zones. We have successfully design the louver-insert configuration according to the flow property measurement of the filter granules. A 3D cold test facility was built using the design configuration. A dust generator has been used in this project in order to run the cold model test. The cold tests include the filtration efficiency and the moving bed pressure drop measurements. The filter granular circulation rate, the inlet gas velocity and the dust cake are important factors influencing the filtration efficiency. The cold test results give important information for designing the prototype of the moving granular bed filters.
