在化學迴圈燃燒系統中，固體循環量是一個重要的參考，取決於系統的設計、載氧體的運行狀況。本研究探討1 kWth之交聯式流體化床之冷態模型的氣-固流動現象，空氣反應器為流化床，燃料反應器為鼓泡床，以巴西礦石作為載氧體。探討不同固體運行量、空氣反應器與密封迴路的氣體流量，空氣反應器的流量維持20 L/min，改變空氣反應器與側流的流量，分析各部位的壓力分佈，藉由提升管的壓力差求出顆粒循環速率，找出最佳運行參數，進一步測試密封迴路的分配比與隔絕效果，結果顯示密封迴路的隔絕效果很好，但在旋風分離器出口測到追蹤氣體，表示料腿的隔絕效果不如預期。在交聯式流體化床中，載氧體的磨耗特性顯示，天然鐵礦適合運用在交聯式流體化床中，在5小時的運行中，磨損量為0.14 wt%，使用壽命為3571小時。
冷態模型能長時間穩定運行後，建立一1 kWth熱態模型，以澳洲礦石作為載氧體，通入空氣加熱到950℃，探討側流的影響，藉由記錄壓力變化，計算出系統內的固體循環量，數據顯示添加側流會降低固體循環量，顯示冷態模型與熱態模型實驗結果不完全相同，且在燃料反應器中會有部分鐵礦不能順利循環，而有FeO相態的生成，然而反應器的嚴重形變，則需進一步的改善設計。

In a chemical-looping combustion (CLC) process, the solid circulation rate (GS) is a key parameter that is affected by the whole system design and operating conditions of oxygen carries. In this study, a 1 kWth cold flow model of interconnected fluidized bed for CLC system was established to investigate the transferring phenomena of gas and solid. The reactor type of air and fuel reactor are fluidized bed and bubbling bed, respectively. The oxygen carriers were prepared from the iron ore of Brazil. The effects of operation parameters, such as bed inventory, gas flow of air reactor and loop-seal, on the solid circulation rate were investigated. The gas flow rate to air reactor was kept at 20 L/min with variant major and secondary gas flow rates. The pressure distribution in each part of this system was monitored and the solid circulation rate was calculated from the pressure drop of raising tube. The optimal operation parameters was obtained via this experiment. The gas distribution ratio and seal effect of this designed loop-seal were further examined. The result indicated it exhibits the effective separating function for air and furl reactors. However, the trace gas was found in the exit of cyclone, indicating the sealing property of dipleg of cyclone was not sufficient. The attrition rate of oxygen carrier in this CLC system is measured. After 5 h of operation, 0.14 wt% of oxygen carrier was blown away, indicating the lifetime was 3571 h.
A 1 kWth hot prototype of CLC system was further established with using iron ore of Australia as oxygen carrier. The effect of secondary air flow in the air reactor on solid circulation rate was studied at 950oC. The data showed that the increase in secondary air flow rate will decrease the solid circulation rate. The data from hot prototype and cold model were not well consistent with each other. A partial ore was not circulated smoothly in the hot prototype, resulting in the generation of FeO phase. The shape of CLC reactors was obvious changed under the hot condition and it retarded the solid circulation. The design of hot prototype should be further improved for long-term operation.

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