由於能源日漸短缺，其他替代性能源輾轉被利用，尤以煤之蘊藏量最為豐富。目前各先進國家在先進燃煤發電系統主要研發項目即為整合型氣化煤複循環系統(IGCC; Integrated Gasification Combined-Cycle)。在燃煤氣化後之高溫合成氣體中含有大量粒狀物質及有害物質，除環境保護考量外，也需在高溫高壓狀態下去除合成氣中的有害物質，防範下游之燃氣渦輪機(Gas Turbine)受到損壞，以確保氣渦輪機動力系統的正常運作。故發展高溫氣體淨化技術，乃為現今當前要務之一。流動式顆粒床過濾器淨化高溫氣體是IGCC 系統中提昇效率之主要關鍵之一，但在顆粒床中一直存在濾材靜止區形成問題，造成過濾系統堵塞使過濾效率降低。在過去幾年研究中，我們已經發展了顆粒床內置入一系列流動校正單元，可有效解決靜止區產生問題。不過，對於高溫氣體淨化系統的商業化，尚有許多問題仍需解決。本計畫即將針對流動式顆粒床整體過濾系統實務應用發展，設計相關周邊次系統，包括合成氣進風口系統、複合型顆粒床過濾器系統及冷性能過濾系統等。計畫第一年針對顆粒床過濾器之合成氣進風口風速分佈不均現象進行系統改善設計，以進風口速度均勻為目標，於進風口中置入導流板設計，並進行氣體速度分佈量測實驗，而最佳的實驗參數將與顆粒床結合。第二年計畫則是針對合成氣體中之有害物質(酸性氣體、二氧化碳等)，並以兩段過濾為主軸，進行複合型顆粒床系統設計。除實際測試顆粒床中兩種不同濾材之流場型態外，也將以第一年所得之成果延續，進行其合成氣進風口處理系統的開發，以上實驗成果都將將整合於顆粒床系統中，以利第三年冷性能過濾實驗的進行。計畫第三年將依據前二年的實驗成果及整合，進行冷性能過濾實驗，而進口風速、床體壓降變化、濾材質量流率與堆積濾餅厚度都是影響的因素，實驗所得之結果將進行冷性能過濾資料庫的建立，供未來在建立高溫氣體淨化系統設計上參考。 high-temperature gas cleanup system was designed in order to promote the performance of the IGCC power system. The IGCC system is considered the highest potential facility provide the important design for advanced coal-fired power plants. The high temperature syngas contains many dust particulates and fly ashes which should be filtrated before entering gas turbine. The moving granular bed used for filtration of the hot gas is one important apparatus under development. When the filter granules move downwards through the vertical channel, the stagnation zones may form causing serious plugging problem. Putting a series of flow corrective elements has been demonstrated to be a good solution to diminish the stagnant zones and has been patented by our research group. However there still remain some systematic problems to commercialize the whole facility. This project will develop the some sub-systems of moving granular bed filter, including: syngas gas inlet system, new design of granular bed filter using dual filter medium and establishment of cold test. For the first year, we will develop the syngas gas inlet system by carefully designing the appropriate louver baffles to reach the uniform gas inlet distribution. The uniform gas inlet distribution could increase the filtration efficiency and utility rate of filter medium. The optimal results will be incorporated into the granular bed filter design. In the second year, we will develop the granular bed filter by using the dual filter medium. The harmful substances (acid gas, Sox and NOx；Carbon dioxide, CO2…etc.) could be removal by putting different filter medium to the granular bed. The flow pattern and gas inlet distribution will be studied and the optimal results will be put into the granular bed filter. The cold test filtration experiments in the third year include the filtration efficiency and the moving bed pressure drop measurements. The filter granular circulation rate, the inlet gas velocity and the dust cake are important factors influencing the filtration efficiency. The database of cold model will be established according to the experimental results. The results will give important information for designing the hot model of the moving granular bed filters in the future. 研究期間：9901 ~ 9912
