Fe_3Al金属滤芯特性及在U-gas煤气化装置中的应用

为了解决U-gas粉煤气化工艺飞灰过滤器装置中陶瓷滤芯的断裂问题,分析了陶瓷滤芯和金属滤芯的性能差异,在装置中安装了国产改进2050型Fe_3Al金属滤芯并投运试验,研究了投运后合成气及飞灰特性、滤芯的微观形貌、过滤效率、流量-压差曲线、滤饼渗透性等特性。结果表明,在与陶瓷滤芯相同过滤精度条件下,Fe_3Al金属滤芯具有孔隙率高、渗透性高、压溃强度大等优势。投运结果表明,Fe_3Al滤芯投运3个月以来无断裂故障,在相近工况条件下,Fe_3Al滤芯运行平衡压差相比陶瓷滤芯下降了50%,且水洗塔悬浮物固含量由1 000~2 000 mg/L下降至100~500 mg/L。

Performance of Fe3Al metal filter and its application in U-gas coal gasification plant

In order to resolve the fracturing issue of the traditional ceramic filter in fly ash filter of pulverized coal U-gas gasification process,the performance of the ceramic filter and metal filter was investigated.The improved domestic 2050 type Fe3Al sintered metal filter were firstly installed in fly ash filter in U-gas system;and it was taken as a research object on the commissioning test.The properties of syngas and fly ash,microstructure of filter,filtration efficiency,flow rate,differential pressure curve and filter cake permeability were studied.The results show that the Fe3Al filter with the same filtration precision as the ceramic filter has high porosity,permeability,and crushing strength.And it gains a 3 months continuous operation performance under similar condition.The running balance differential pressure of Fe3Al filter decreases by 50％ compared with traditional ceramic filter;meanwhile the content of suspended solids in washing tower significantly decreases from 1 000-2 000 mg/L to 100-500 mg/L.