State Key Laboratory of Coal Combustion, School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan 430074, China.
State Key Laboratory of Coal Combustion, School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan 430074, China; Research Institute of Huazhong University of Science and Technology in Shenzhen, Shenzhen, 518000, China.
Waste Manag. 2022 Apr 15;143:135-143. doi: 10.1016/j.wasman.2022.02.028. Epub 2022 Mar 4.
Facing the challenges of organic industrial solid waste (OISW) disposal, co-processing of OISW by power plants has become a developing trend. In order to avoid feeding problems of OISW and enhance the combustion adaptability of the furnace, pyrolysis coupled with incineration technology is proposed as a potential method. Among various OISW, automobile shredder residue (ASR) is regarded as a promising fuel due to its high heating value. In view of engineering application, the researches focused on the products' properties and economic evaluation under a wide range of heating rates which are insufficient. In this study, regarding the rapid pyrolysis by conducting the high-temperature flue gas as heating source in power plants, the pyrolysis behavior of ASR was correspondingly studied under a wide range of heating rates. The formation of volatiles and property's improvement were further investigated for generating high-valued oil. Results showed that the high heating rate is not only beneficial to the homogenization of pyrolytic products but also the aromatization in oil and radical generation in gases. Importantly, it also contributed to the cleavage of the single bond connected to the benzene ring and carbon-oxygen single bond for esters. By conducting the enhanced cracking of volatiles, the wax-like fraction was significantly reduced. In addition, the deoxygenation in oil (oxygen content decreased by 20 wt%) and high heating value of gases (increased by 73%) were improved. Our findings demonstrated the feasibility and economic efficiency for the co-processing of ASR in coal-fired power plants via pyrolysis and thus provide guidance for future commercial application.
面对有机工业固体废物（OISW）处理的挑战，发电厂协同处理 OISW 已成为一种发展趋势。为了避免 OISW 的进料问题，并增强炉内的燃烧适应性，提出了热解与焚烧技术相结合的方法。在各种 OISW 中，汽车破碎机残渣（ASR）由于其高热值而被认为是一种很有前途的燃料。鉴于工程应用，针对在较宽加热速率范围内的产物特性和经济评估的研究还不够充分。在这项研究中，针对在发电厂中使用高温烟道气作为热源进行快速热解的情况，相应地研究了 ASR 在较宽加热速率范围内的热解行为。进一步研究了挥发分的形成和性质的改善，以生成高价值的油。结果表明，高加热速率不仅有利于热解产物的均匀化，而且有利于油的芳构化和自由基的生成。重要的是，它还有助于断裂与苯环和酯中的碳氧单键相连的单键。通过对挥发分进行增强裂解，蜡状馏分显著减少。此外，油中的脱氧（氧含量降低了 20wt%）和气体的高热值（增加了 73%）得到了改善。我们的研究结果表明，通过热解协同处理 ASR 在燃煤电厂中是可行且具有经济效益的，从而为未来的商业应用提供了指导。
