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重點實驗室學術報告会通知(2019.08.16)

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应中國科學院可再生能源重點實驗室和广东省新能源和可再生能源研究开发与应用重點實驗室的邀请,英国诺丁汉大学Hao Liu(劉浩)教授將于2019816-18日来访并举行學術報告会。报告会放置如下:

    間:2019816日(周五)下午1330-1450

    點:節能大樓1010会议室(節能大樓一楼大厅左转党员活动室)

報告題目:Agglomeration, defluidisation and their countermeasures for biomass combustion in fluidised beds

報告摘要: In this study, the combustion of pelletised problematic biomass fuels (wheat straw and miscanthus) was investigated in a 20 kWth bubbling fluidised bed (BFB) combustor using quartz sand as the bed material. The combustion profiles were established for the two fuels at the bed temperature above 820  ?C with regards to the combustion temperature distribution, pressure variance and defluidisation time. The mitigation of bed agglomeration and defluidisation was investigated by the addition of 1.5 wt% lime to fuel, the addition of 5 wt% dolomite and 5 wt% of molochite to bed materials respectively. All the additives successfully maintained the combustion temperature at 900 ?C for both fuels.

 

The defluidisation time was significantly extended by over 14 times via adding lime to fuel which provided a continuous on-site agglomeration counter action. 5% wt addition of dolomite to the bed material extended the defluidisation time for both fuels by ca.6 times for straw and 2 times for miscanthus. The use of molochite as bed additive doubled the defluidisation time for miscanthus combustion but did not affect that of straw combustion.

 

The impacts of the oxy-fuel combustion atmosphere on the performance of bed additives were investigated by using the synthetic oxidiser of 30 vol% O2 and 70 vol% CO2. The experimental results indicated that the CO2-rich atmosphere significantly hindered the performance of dolomite as a bed material additive on the defluidisation time due to the restrained decomposition of dolomite which resulted in less CaO in the bed to counter the formation of K-rich sticky molten phases.

 

Ash fusion tests were conducted on an ash fusibility furnace with fuel ashes with and without the additives and the results were used to better understand the fuel ash melting process and the effect of additives on the agglomeration and defluidisation behaviour observed with the BFB tests.

 

報告人簡介

Professor Hao Liu,英國諾丁漢大學工程學院講席教授。英國自然科學基金委(EPSRC)碳捕獲和儲存及清潔化石博士培訓中心副主任。Professor Hao Liu長期從事清潔化石能源與生物質技術的研究與開發,積累了25年的發電廠工程,流化床技術,煤/生物質燃燒和氣化,碳捕獲,熱電聯産和可再生能源技術的研究經驗。他掌管或共同掌管了18個由英國EPSRCTSBCarbon Trust和其他國家和國際組織資助的研究項目,這些項目的資助總額超過1800萬英鎊。在潔淨化石能源和生物質能源技術領域的研究享有較好的國際聲譽,發表學術論文100余篇,目前指導約15名博士後和博士生。

參加人員:请生物質熱化學轉化研究室、廢棄物處理與資源化利用研究室、燃烧与热流研究室以及城乡矿山集成技术研究室的老师和研究生参加,同時欢迎其他感兴趣的人员参加。

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