The cyclone separators performances under high temperature in PFBC unit

Abstract

A high temperature gas cleanup system, which consisted of three cyclone separators in series, has operated satisfactorily through 500 hours in a 1 Mwt PFBC pilot test unit. The total collection efficiency of this system was 99–99.3%. The fly ash concentration in cleaned gas stream reduced to values below $\text{2×10}{}^{\mathrm{-4}}\text{kg/m}{}^3$ (N) and there are no particles larger than 10μm. The second stage cyclone is the newly developed Φ 240mm PV type cyclone separator with dimensions optimized. Its measured cut size is 1.2μm and the resistance coefficient considering pressure drop about 12. The third stage multicyclone separator consists of three Φ100 EPVC — I type cyclone tubes and its collection efficiency of 8μm particle is about 99.5%.