- 期刊
移動床化學迴路系統的載氧體輸送技術設計開發
The Development of Oxygen Carrier Transportation Technique of A Moving Bed Chemical Looping System
摘要
移動床化學迴路系統具有載氧體高轉化率的特性，適用於具二氧化碳捕獲功能的產氫應用，而載氧體的氣力輸送技術為系統運作的關鍵技術。工研院建置30kW_(th)（甲烷反應系統，經甲烷熱值與流量計算達30kW操作下），以中心噴流泵作為載氧體計量控制與輸送及氣體隔絕裝置。載氧體經由中心噴流泵送料器輸送至上升管底部，再藉風車將載氧體向上傳輸。風車需提供1,110 LPM風量，而上升管氣送的固氣（質量）比為1.19，屬疏相輸送狀態。為了提升固氣比以減少氣體供應的能耗，工研院於系統放大工程中，以上升管密相輸送概念將輸送系統以低壓壓縮氣源作為氣送載氧體的單一氣源，輸入中心噴流泵送料器，達到載氧體計量、向上輸送及與上游元件氣體隔絕的作用。冷模測試的工作氣源流量750 LPM，載氧體循環量為4.7 kg/min，固氣比為4.00。工研院所開發的移動床化學迴路系統中心噴流泵密相輸送載氧體輸送技術具有系統簡化、減少能耗與熱損的特性。
並列摘要
Moving bed chemical looping system with high conversion rate of the oxygen carriers is mainly applied to the hydrogen production coupling with the carbon dioxide capture function. The pneumatic transportation technology of solid oxygen carriers is the key factor for the system operation. ITRI has developed a 30kW_(th) moving bed chemical looping system, which used methane as fuel and adapted central jet pump for flow control and transportation of oxygen carriers and sealing device of reactor gas. The oxygen carriers were sent upward in the riser by the air flow supplied from the blower with the flow rate of 1,110 LPM. The solid to gas ratio in the riser was about 1.19, which the transportation belongs to dilute phase conveying mode. In the following system scale up task, the dense phase conveying transportation of oxygen carrier was applied in the riser design to reduce the energy consumption of the gas supply. The transportation system of oxygen carriers used a low-pressure compressing air as a single purging gas source into central jet pump for the flow control and transportation of oxygen carriers and gas sealing of reactor. The cold model test result showed that, at the compressing air flow rate of 750 LPM, the oxygen carrier circulation rate could be 4.7 kg/min and the solid to gas ratio in the riser was 4.00. The developing technique possesses the simplification of the system component, reduction of the energy consumption of the gas production and reduction of the system heat loss. In the future, ITRI plan to demonstrate the continuous performance this oxygen carrier transportation technique on the pilot scale moving bed chemical looping system.