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  • 徐根利,梅振飞,陈德珍.污泥热解-自源炭重整获取高品质油气产物[J].环境工程学报,2019,13(5):1209-1219.DOI:10.12030/j.cjee.201810130    [点击复制]
  • XU Genli,MEI Zhenfei,CHEN Dezhen.Produce high quality gas & oil products from sewage sludge pyrolysis & char reforming process[J].,2019,13(5):1209-1219.DOI:10.12030/j.cjee.201810130   [点击复制]
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污泥热解-自源炭重整获取高品质油气产物
徐根利,梅振飞,陈德珍
0
(同济大学机械与能源工程学院,热能与环境工程研究所,上海 201804)
摘要:
利用污泥热解-自源炭重整的方式获得高品质的燃气和油,为了实现更高的气、油转化率,在600 ℃的重整条件下,对比了污泥在450~600 ℃内不同热解温度下产生的热解挥发分利用自源炭催化重整后的气、油产量与特性,同时考察了自源炭生成方式的影响。研究结果表明,550 ℃下污泥热解产生的热解液产量最高,同时最容易被炭催化裂解,但是因积碳使得污泥转化为气、油的产率不高。600 ℃下热解产生的挥发分经过重整后获得最高的气体转化率与热值,但也存在积碳问题。与一步升温到600 ℃的热解炭相比,不同温度下的热解炭继续被加热到600 ℃所获得的分步热解炭更符合连续化操作要求,但其重整效果总体上不如前者好;而热解温度在450 ℃时例外,450 ℃的热解炭继续升温至600 ℃并重整450 ℃热解挥发分,能够获得最高的气、油产率并减少碳沉积。在实际情况下的热解-重整连续化操作中推荐热解温度为450 ℃以及重整温度为600 ℃,以获得高值产物并降低对热解装置的要求。
关键词:  污泥  热解  炭重整  挥发分  裂解性质  一步热解炭  分步热解炭
DOI:10.12030/j.cjee.201810130
投稿时间:2018-10-23
基金项目:国家自然科学基金面上项目51776141;四川省科技计划资助2018TJPT0017国家自然科学基金面上项目(51776141);四川省科技计划资助(2018TJPT0017)
Produce high quality gas & oil products from sewage sludge pyrolysis & char reforming process
XU Genli,MEI Zhenfei,CHEN Dezhen
(Institute of Thermal and Environmental Engineering, School of Mechanical Engineering, Tongji University, Shanghai 201804, China)
Abstract:
In general, high quality gas & oil products could be obtained through a sewage sludge pyrolysis & char reforming method. In order to realize higher gas & oil conversion rate, gas & oil production and property after char catalyzing and reforming pyrolysis volatile, which was produced from sludge pyrolysis at different temperatures within 450~600 ℃, were compared under the same reforming temperature of 600 ℃. Then the effect of char yield ways was also investigated. The results showed that pyrolytic liquid gained its highest yield at the pyrolysis temperature of 550 ℃ and it was easiest to be cracked by char catalysis. However, severe carbon deposition during the reforming process led to the relatively low yields of the final gas & oil products. The highest gas conversion rate and heat value occurred after reforming the volatile produced from sludge pyrolysis at 600 ℃, but the problem of carbon deposition still existed. Compared with the one-step pyrolysis char produced at 600 ℃, the stepwise pyrolysis chars, which were obtained by heating chars from their pyrolysis temperature to 600 ℃, were more coincident with the requirement of continuous operation, but had a lower reforming effect except for the one originally produced at 450 ℃. When the char produced at 450 ℃ and heated up to 600 ℃ was used to reform the pyrolysis volatile of 450 ℃, the highest gas & oil yield was obtained and carbon deposition could be alleviated. In practice, to run a continuous pyrolysis & reforming process for sewage sludge, pyrolysis temperature of 450 ℃ and reforming temperature of 600 ℃ are recommended to obtain more gas & oil products, and to reduce the quality requirement for pyrolysis facilities.
Key words:  sewage sludge  pyrolysis  char reforming  volatile  cracking property  one-step pyrolysis chars  stepwise pyrolysis chars