研究期間：10303~10312;The Integrated gasification combined-cycle system for power generation and the advanced coal-fired power plants have been developed in United States, Europe and Japan in recent years. High temperature gases are generated during the gasification the biomass or the coal. The high temperature gases contain many dust particulates and fly ashes which should be filtrated before entering gas turbine. This project extended results of previous year with the successful development of a 3D two-stage filtration system. In accordance to the results of previous year, the database of cold test of filtration efficiency has been created. During the cold test in the filtration efficiency in last year, the parameters of mass flow rates in the coarse and fine particles (110/330 g/min、110/660 g/min、330/110 g/min、330/660 g/min、660/110 g/min、660/330 g/min) and different level of granular bad (+0/+0 mm、+100/+0 mm、+0/+100 mm、-100/-100 mm) have be employed. In the research during this project, the filtration efficiency has archived the best result by the level of granular bed of +0/+100 mm with mass flow rate of 330/660 g/min. The median size of dust particle of 12.49 μm was obtained from the best result of cold test. However, the creation of a database of cold test filtration efficiency yet completes. So the parameters of median size of captured dust particles from outlet will be analyzed in this year. During the cold test of efficiency of filtration in this year, the parameters of fixed bed or moving bed and the fine filtration media of different particle sizes (0.2~0.5 mm、0.3~0.7 mm、0.5~1 mm及1~2 mm) will be employed. The measurement of pressure drop and efficiency of filtration in this two-stage filtration system will be recorded and the collected dust from outlet of the filter will be analyzed. The two parameters of operation will be changed during cold test in order to compare the effects of filtration efficiency and pressure drop. In the last half year of plan, a dual-filtration media recyclable system will be design and be manufactured. This system includes dual-filtration media screening system and dual-filtration media pneumatic system for propose of filtration media recycling. Therefore, the database of filtration efficiency will be accomplished due to serials of cold tests of filtration. With the result of this project, we can design the 3D two-stage moving granular bed for the hot test. The final goal of the project, we wish the design rules for the commercialized moving granular bed filter can be developed.
