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污泥热解-自源炭重整获取高品质油气产物

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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
引用本文: 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
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XU Genli, MEI Zhenfei, CHEN Dezhen. Produce high quality gas & oil products from sewage sludge pyrolysis & char reforming process[J]. Chinese Journal of Environmental Engineering, 2019, 13(5): 1209-1219. doi: 10.12030/j.cjee.201810130
Citation: XU Genli, MEI Zhenfei, CHEN Dezhen. Produce high quality gas & oil products from sewage sludge pyrolysis & char reforming process[J]. Chinese Journal of Environmental Engineering, 2019, 13(5): 1209-1219. doi: 10.12030/j.cjee.201810130
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污泥热解-自源炭重整获取高品质油气产物

  • 1.

    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

  • 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

  • 1.

    Institute of Thermal and Environmental Engineering, School of Mechanical Engineering, Tongji University, Shanghai 201804, China

  • Fund Project:

  • 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。
    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.
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  • 刊出日期:  2019-06-03

污泥热解-自源炭重整获取高品质油气产物

  • 1. 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
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)

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。

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