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以抗生素菌渣、煤为研究对象,利用热重-差示扫描量热仪(TG-DSC)研究两种物质单独以及混合燃烧的燃烧特性,并采用Coats-Redfern法确定混合燃烧的动力学参数。分析菌渣掺混比和粒径对燃烧过程的影响,阐明菌渣与煤混合燃烧的可能以及超细化燃烧的优势。结果表明:抗生素菌渣与煤混合燃烧主要包括三个阶段,添加菌渣能明显改善煤的燃烧特性。随着菌渣掺混比例的增加,着火温度、燃尽温度呈现降低的趋势。超细、非超细混合燃烧燃尽特性指数在菌渣掺混比为30%时最高,分别为5.82×10-3、5.49×10-3。超细混合燃烧活化能均低于非超细混合燃烧,说明超细化燃烧有利于降低活化能。超细、非超细混合燃烧活化能E和指前因子A之间均存在动力学补偿效应。
The antibacterial bacteria residue and coal were used as the research objects. The combustion characteristics of the two substances alone and the mixed combustion were studied by TG-DSC. The kinetic parameters of the mixed combustion were determined by Coats-Redfern method . Analysis of the impact of the mixing ratio and particle size of bacteria residue on the combustion process to clarify the possibility of mixed combustion of bacteria residue and coal and the advantages of ultrafine combustion. The results showed that the mixture of antibiotic bacteria residue and coal mainly consisted of three stages. Adding bacteria residue could obviously improve the combustion characteristics of coal. With the increase of the proportion of bacteria residue, the ignition temperature and the burnout temperature showed a decreasing trend. The exhaustion index of ultra-fine and non-ultrafine hybrid combustion was the highest at the mixing ratio of bacteria residue of 30%, which were 5.82 × 10-3 and 5.49 × 10-3 respectively. The activation energy of the ultrafine hybrid combustion is lower than that of the non-ultrafine hybrid combustion, which shows that the ultrafine combustion is beneficial to reduce the activation energy. The kinetic compensation effect exists between the activation energy E and the pre-exponential factor A of ultrafine and non-ultrafine hybrid combustion.