Performance of Fe_3Al 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 Fe_3Al 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 Fe_3Al 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 Fe_3Al 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.