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    Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/70997


    Title: 複合式淨化技術之先期建置與發展;Advanced setup and development of combined coal cleanup technology
    Authors: 蕭述三
    Contributors: 機械工程學系
    Keywords: 循環再生;兩段式顆粒床過濾器;雙濾材;壓降;過濾效率;Recycling;two-stage granular bed filter;dual-media;pressure drop;filtration efficiency;源工程;機械工程
    Date: 2016-08-31
    Issue Date: 2016-10-11 19:30:40 (UTC+8)
    Publisher: 行政院原子能委員會 
    Abstract: 近年來歐、美、日等工業先進國家致力發展二十一世紀的新式先進燃煤技術,如整合型氣化煤複循環系統(IGCC, Integrated Gasification Combined-Cycle),這些系統均會產生高溫高壓之氣體及飛灰,在進入氣渦輪機前必須有效的控制,方能使系統有效運作。 去年計畫(名稱:複合式淨化技術應用與發展)採用已成功開發之三維流動式兩階段顆粒床過濾器及其週邊系統,並依據此系統建立一套冷性能過濾效率資料庫,其中冷性能過濾實驗參數分別使用固定床及移動床兩種床體過濾模式,並以出口端不同粒徑分佈大小(0.2~0.5 mm、0.5~1 mm及1~2 mm)之細砂濾材進行冷性能過濾效率測試實驗,並於測試期間紀錄測量床體間壓降變化與計算過濾效率,及捕集過濾床出口端粉塵以進行粉塵粒徑大小之分析。實驗結果顯示滾筒篩分之分離效率以滾筒轉速42.8 rpm及滾筒傾斜角5°時為一分水嶺,且分離效率會隨著細砂粒徑變大而增加;再生系統下之過濾效率,則會隨著細砂粒徑變大而遞減,其粒徑分析D50則為12.52 μm。不過冷性能過濾效率資料庫的建立仍未臻完備,本年度計畫中將針對影響再生循環系統下的參數部分再進行最佳化調整,盼以進一步解析兩階段過濾器系統中最重要的過濾效率指標。 本年度計畫將持續進行相關顆粒床過濾實驗,其中以循環再生系統為主軸,搭配氣送管路中之旋風分離器,並以最佳化滾筒篩分效率之設計參數進行冷性能兩階段過濾實驗,未來還可採置換濾材之方式以過濾所需物質(如:除硫、除汞),達到複合式淨化技術之目的。同時在測試期間紀錄床體間壓降變化與計算過濾效率,及捕集過濾床出口端粉塵以進行粉塵粒徑大小之分析,此實驗規劃除了希望降低出口端補集之粉塵粒子平均粒徑外,也希望藉由一系列之參數規劃建立更為完備之過濾效率性能資料庫。由上述計畫執行三維冷性能兩階段過濾系統測試模型實驗所得之結果,將可作為未來進行三維兩階段熱模系統建置與實驗測試基礎,而計畫最終目標則是可為建立商業化之高溫燃氣流動式兩階段顆粒床過濾系統而邁進。  ;The Integrated gasification combined-cycle system for power generation and the advanced coal-fired power plants have been developed in United States, Europe and Japan in recent years. High temperature gases are generated during the gasification the biomass or the coal. The high temperature gases contain many dust particulates and fly ashes which should be filtrated before entering gas turbine. This project extended results of previous year with the successful development of a 3D two-stage filtration system. In accordance to the results of previous year, the database of cold test of filtration efficiency has been created. During the cold test of efficiency of filtration previous year, the parameters of fixed bed or moving bed and the fine filtration media of different particle sizes (0.2~0.5 mm、0.5~1 mm and 1~2 mm) were employed. The measurement of pressure drop and efficiency of filtration in this two-stage filtration system was recorded and the collected dust from outlet of the filter was analyzed. The experimental results indicated that 42.8 rpm of rotation drum speed and 5° of rotation drum incline angle were obtained as a watershed. The separation efficiency increased as particle size of fine sand increased. Meanwhile, the filtration efficiency decreased as particle size of fine sand increased. The analysis of particle distribution also revealed that D50 decreased as filtration efficiency increased and the lowest value of D50 of 12.52 μm could be obtained at the range of 0.2~0.5 mm of fine sand. Therefore, the database of filtration efficiency will be accomplished due to serials of cold tests of filtration with optima design of parameters. During cold test of this year, the dual-filtration media recyclable system will be the main subject of filtration test with the optima design of screening system. In addition, the filtration medium could be replaced by desulfurization to accomplish the combined coal cleanup technology. Also the measurement of pressure drop and efficiency of filtration in this two-stage filtration system will be recorded and the collected dust from outlet of the filter will be analyzed. With the result of this project, we can design the 3D two-stage moving granular bed for the hot test. The final goal of the project, we wish the design rules for the commercialized moving granular bed filter can be developed. ;研究期間:10503 ~ 10512
    Relation: 財團法人國家實驗研究院科技政策研究與資訊中心
    Appears in Collections:[機械工程學系] 研究計畫

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