高温煤气铁钙基脱硫剂再生研究

REGENERATION OF Fe-Ca BASED SORBENT FOR HOT GAS CLEANING

在固定床装置上考察了温度和氧浓度对铁钙基脱硫剂再生率以及二次脱硫活性的影响,同时还考察了此脱硫剂用于模拟的脱硫除尘一体化条件下,黏附于表面的粉尘对脱硫剂再生行为以及二次脱硫行为的影响。结果表明,该脱硫剂在480℃下再生效果良好,650℃再生率下降,在考察的温度区间内(400℃～650℃)温度对二次脱硫活性影响较小,在以后的循环中,温度对再生率以及脱硫活性的影响也小,再生气氛中氧浓度对再生率以及二次脱硫活性的影响不明显;研究发现加入粉尘虽然会降低脱硫剂的再生率,但基本不影响二次脱硫活性。

The influence of regeneration temperatures in range of 400?℃～700?℃ and the regeneration atmosphere composed of O2 and N2 in varying proportions on regeneration conversion and the following sulfidation reactivity were investigated in a fixed bed reactor at atmospheric pressure In addition, the influence of deposited dust adhered to the surface of sorbents on regeneration were studied, which can be encountered in the combined process of simultaneous removal of dust and sulfur The characterization of regenerated samples was undertaken by XRD and BET techniques The results showed that increasing temperature had a negative effect on firstcycle regeneration conversion, but little effect on regeneration conversion and sulfidation reactivity in the following cycle Meanwhile regeneration atmosphere studied has very little effect on the regeneration conversion and the following sulfidation reactivity Furthermore, the addition of dust into the sorbent would decrease the regeneration conversion, but had no noticeable influence on the following sulfidation reactivity