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    題名: 移動式顆粒床之進口粉塵濃度與再生循環對過濾效率的影響
    作者: 許端祐;Syu, Duan-you
    貢獻者: 機械工程學系
    關鍵詞: 移動式顆粒床過濾器;粉塵濃度;篩分效率;過濾效率;moving granular bed filter;dust concentration;screening efficiency;collection efficiency
    日期: 2017-01-19
    上傳時間: 2017-05-05 17:42:06 (UTC+8)
    出版者: 國立中央大學
    摘要: 本研究依據先前開發針對中高溫除塵技術-移動式顆粒床過濾器
    及周邊子系統(如:氣體輸送系統、濾材/粉塵篩分系統及濾材循環再生
    系統等),進行長時間冷性能連續化過濾運轉測試,本研究之實驗結果
    能提供未來建立中高溫除塵技術開發與商業化之依據。
    本論文中探討在顆粒床過濾器在面對不同粉塵濃度的情形下的
    情形;在滾筒篩分系統中,由於操作方法及粉塵含量的不同導致顆粒
    濾材與粉塵的篩分效率變化影響再生效率;在顆粒濾材之再生循環過
    程中,將微量粉塵經由再生循環管路回送至床體內部,其對整體顆粒
    床過濾效率之影響;以及在不同進氣口粉塵濃度的影響下,顆粒床過
    濾器整體過濾效率、壓降及出口粉塵粒徑的變化。
    實驗結果顯示,在滾筒篩分系統中,粉塵含量的多寡對其整體的
    篩分效率影響不大;在顆粒床過濾器整體之過濾效率方面,進風口於
    低粉塵濃度的條件下,顆粒床過濾器有著良好的過濾效率,其整體過
    濾效率的結果皆維持在99%以上,出口粉塵平均粒徑為1.75 μm 以
    下。但在進氣口於高粉塵濃度的條件下,由於顆粒床過濾器其床體內
    部粉塵含量處於過飽和的情形,使得顆粒床過濾器整體的過濾效率、
    出口粉塵粒徑皆產生大幅度的波動;研究實驗結果顯示,於濾材質量
    流率480 g/min、滾筒轉速21.5 rpm,在入口表面風速70 cm/s 的條件
    下,可以得到較佳的過濾效率與出口粉塵平均粒徑,分別為98.6 %與
    3.65 μm。;This study is based on the high temperature dust removal technology-
    Moving Granular Bed Filter and other subsystems (e.g. Gas delivery
    system, Filter/dust screening system and Filter recycle system) operation
    test for long term. The experimental results can provide the future
    development of high-temperature dust removal technology and
    commercial basis.
    This thesis investigated the operation of granular bed filter in different
    conditions of dust concentration, the regeneration efficiency is affected by
    the different separation rates due to different operation methods and dust
    contents in the drum screening system, the influence of overall efficiency
    of the granular bed filter from trace dust through the regeneration cycle
    pipeline back into the granular bed in the regeneration process, and the
    variation of the whole collection efficiency, pressure drop and export dust
    size in different inlet dust concentration.
    The experimental results showed that the amount of dust contents
    cannot affect its overall screening efficiency in the drum screening system.
    For the overall filter efficiency of the granular bed filter, the import with
    low dust concentration can provide great collection efficiency and low
    export dust size, each of them are more than 99% and less than 1.75μm
    respectively. But when the condition of high dust concentration that
    collection efficiency and dust size has a large fluctuation due to
    supersaturation of the dust content inside the granular bed. The
    experimental results show that the mass flow rate of filter media is 480
    g/min and the rotational speed is 21.5 rpm. On the condition of inlet velocity of 70 cm/s, the collection efficiency and dust size is 98.6% and
    3.65 μm.
    顯示於類別:[機械工程研究所] 博碩士論文

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