基于污泥处置技术的减容化、无害化、稳定化和资源化的目的,本文首次采用化学链燃烧技术来处置污泥,实验基于赤铁矿载氧体在1 kW_(th)串行流化床上开展。研究了燃料反应器温度对污泥燃烧特性的影响,并对比了淮北无烟煤和污泥化学链燃烧特性的差异,以及考察了赤铁矿长期运行的物化性能。实验结果表明,在本实验的工况下,没有焦炭随载氧体进入到空气反应;随着燃料反应器温度的增加,污泥和煤的碳转化率均增加,但污泥的碳转化率要高于煤;同时,水蒸气的加入可提高污泥的碳转化率,但水蒸气的量对其影响较小;赤铁矿在长时间运行中,体现了良好的反应以及抗烧结性能。
Chemical looping combustion is an attractive technology for conversion sewage sludge to energy with simultaneous destruction of pathogenic bacteria and reduction of volume.This work attempted to investigate combustion sewage sludge using CLC technology in a 1 kW_(th) continuous CLC unit.The effect of fuel reactor temperature affecting this process were analyzed Additionally,the CLC performance of HuaiBei bituminous coal was used for comparison.The results show that there are no char particles bypassed to air reactor.The increase of fuel reactor temperature leads to the increase of carbon conversion efficiency using either sewage sludge or coal.Nevertheless,the carbon conversion for sewage sludge is always higher than that for coal.Moreover,hematite shows a superior reactivity during 10 h continuous operation.