污泥热解制油

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东 南 大 学 学 位 论 文 使 用 授 权 声 明
东南大学、中国科学技术信息研究所、国家图书馆有权保留本人所送交学位论文的 复印件和电子文档，可以采用影印、缩印或其他复制手段保存论文。本人电子文档的内 容和纸质论文的内容相一致。除在保密期内的保密论文外，允许论文被查阅和借阅，可 以公布（包括刊登）论文的全部或部分内容。论文的公布（包括刊登）授权东南大学研 究生院办理。
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Abstract
Abstract
The production the municipal sludge is becoming huge. Due to its complex composition and great harm to environment, municipal sludge must be managed properly. Thermochemical process such as pyrolysis is gaining academic attention for the valorisation and reduction of this waste. The pyrolysis liquids of sewage sludge contain large amounts of oxygen compounds with high viscosity, catalytic pyrolysis may be a solution for the improvement of its quality. Studies have shown that the mineral elements in ashes of sludge have catalytic effects. In this paper, sludge char was used as the catalysts for pyrolysis of municipal sludge to investigate the effect of different catalytic methods. Several kinds of metals were supported on sludge char to improve the catalytic effect. The reactor of catalytic treatment of vapors of sludge pyrolysis was designed. Thermogravimetric analysis was conducted first, it was found that weightless range of lipids, carbohydrates and proteins overlapped with the heating rate of 100℃/min. A horizontal tube reactor was used to research the pyrolysis of sludge for bio-oil with the addition of char. The influences of temperature as well as proportion of char to the yield, composition and physicochemical properties of pyrolysis liquid were considered. After that, Fe、 Cu、 Al and Ni were supported on the char respectively. Results showed that sludge char promote the hydrodeoxygenation and benzene’s ring-opening reaction of organic phase (OP) in pyrolysis liquids. The heating value and viscosity of OP were also improved. The char-supported Fe which was best for the hydrodeoxygenation favored the highest HHV (higher heating value) of OP for 35.48MJ/kg. The char-supported Ni favored the lowest viscosity with 64.29 cSt@20℃. A vertical fixed bed catalytic reactor was designed and produced, hot pyrolysis vapors coming from sludge ptrolysis in a horizontal tube reactor passed through the catalytic reactor filled with sludge char. The experiments have been done in different temperature matching and height of catalysts to determine optimum experimental conditions. The results showed that the suitable temperature matching for maximum yield of OP was 500/400 ℃. Comparing the condition of sludge pyrolysis with the addition of char, the content of oxygen compounds in OP reduced significantly. The catalytic effects of char performed in two aspects, the promotion of hydrodeoxygenation of OP as well as the transformation of aromatic hydrocarbons into phenol. the promoting effect for hydrodeoxygenation increased With metal supported, the physicochemical properties of OP improved significantly. The char-supported Ni favored the highest heating value of OP for 40.27MJ/kg, while the char-supported Ni favored the lowest viscosity of OP for 18.75cSt@20℃. In addition, the catalytic activity of sludge char was relatively stable. Based on the catalytic effects of sludge char on the vapors from municipal sludge
BY ZHANG Ya
Supervised by Prof. JIN Bao-sheng
School of Energy and Environment Southeast University September 2014
东南大学学位论文独创性声明
东 南 大 学 学 位 论 文 独 创 性 声 明
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Abstract
pyrolysis, the circulating fluidized bed reactor was developed to improve the quality of vapors from sludge pyrolysis with sludge char. For “50t/d interact circulation configuration of sludge low-temperature pyrolysis for bio-oil demonstration project” in Jurong of Jiangsu province, the design of the catalytic treatment reactor of vapors from sludge pyrolysis for quality improvement was conducted on the basis of pyrolysis reaction device, the design was conducted with the purpose of providing the references for future engineering applications. Key words: Municipal sludge; Catalytic pyrolysis; Char; Organic phase; Design calculation
本人声明所呈交的学位论文是我个人在导师指导下进行的研究工作及取得的研究 成果。尽我所知，除了文中特别加以标注和致谢的地方外，论文中不包含其他人已经发 表或撰写过的研究成果， 也不包含为获得东南大学或其它教育机构的学位或证书而使用 过的材料。 与我一同工作的同志对本研究所做的任何贡献均已在论文中作了明确的说明 并表示了谢意。
东 南大学 2014 年 2014 年 月 月 日 日
2014 年 6 月
Experimental research and design of low-temperature catalytic pyrolysis of municipal sludge for bio-oil
A Thesis Submitted to SoutheastUniversity For the Academic Degree of Master of Engineering