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过程工程学报 ›› 2021, Vol. 21 ›› Issue (9): 1108-1116.DOI: 10.12034/j.issn.1009-606X.220193

• 环境与能源 • 上一篇    

含水率及温度对中药渣热解特性影响

陈冠益1,2,3， 邱旭辉1,2， 郭倩倩1， 李健1， 刘彬2， 旦增3， 颜蓓蓓1,2*， 董磊4， 张兆玲4
  

  1. 1. 天津大学环境科学与工程学院，天津市生物质废物利用重点实验室，天津 300072

    2. 天津大学青岛海洋技术研究院，山东 青岛 266235

    3. 西藏大学理学院，西藏 拉萨 850012

    4. 山东百川同创能源有限公司，山东 济南 250102

  • 收稿日期:2020-06-18 修回日期:2020-09-30 出版日期:2021-09-28 发布日期:2021-09-28
  • 通讯作者: 颜蓓蓓 yanbeibei@tju.edu.cn
  • 基金资助:
    MgCl26H2O-Mg(OH)2-MgO技术路线制备高纯镁砂过程基础研究;MgCl26H2O-Mg(OH)2-MgO技术路线制备高纯镁砂过程基础研究

Effect of moisture content and temperature on Chinese medicine residue pyrolysis characteristics

Guanyi CHEN1,2,3,  Xuhui QIU1,2,  Qianqian GUO1,  Jian LI1,  Bin LIU2,  Zeng DAN3,  Beibei YAN1,2*,  Lei DONG4,  Zhaoling ZHANG4   

  1. 1. School of Environmental Science and Engineering, Tianjin University, Tianjin Key Laboratory of Biomass/Wastes Utilization, Tianjin 300072, China

    2. Qingdao Institute for Ocean Technology of Tianjin University, Qingdao, Shandong 266235, China

    3. School of Science, Tibet University, Lhasa, Tibet 850012, China 4. Shandong Baichuan Tongchuang Energy Co., Ltd., Jinan, Shandong 250102, China

  • Received:2020-06-18 Revised:2020-09-30 Online:2021-09-28 Published:2021-09-28

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摘要： 中药渣类高含水工业生物质废弃物能源化清洁处理技术开发尤为重要。本工作以中药渣为研究对象，结合热重表征手段，利用固定床对其进行热解特性研究。研究不同原料含水率、热解温度及热解速率下的热解产物产率分布及其成分和特性，及氮元素在气、液、固三相产物中分布规律。结果表明，该中药渣完全热解的温度范围为650~850℃。在此温度范围中升高温度有利于热解过程，提升了热解效率及可燃气品质，可燃气、半焦中的氮元素含量下降，热解油中的含量上升。降低含水率能够提高热解效率，热解油中含氮化合物含量增加，促使氮元素向液相迁移。中药渣烘干的过程中减少了碱金属含量，影响热解油组分。提高热解速率也能一定程度上影响热解产物组分及氮元素分布。本研究可为中药渣热解过程优化及含氮化合物排放控制提供理论基础。

关键词: 中药渣, 热解, 含水率, 温度, 速率, 氮元素分布

Abstract: It is very important to develop a clean treatment for Chinese medicine residue. In this study, Chinese medicine residue pyrolysis characteristics were investigated by pyrolysis in lab-scale fixed bed with thermo-gravimetric analyzer. The influence of moisture content and pyrolysis temperature on products distribution and their components and characteristics, as well as the distribution rule of N element in gas phase, liquid phase and solid phase were studied in detail. The results showed that the Chinese medicine residue used in this study was completely pyrolyzed in 650~850℃. Increasing the temperature in this range was beneficial to the pyrolysis process and improved the pyrolysis efficiency and the quality of combustible gas. Decreasing the nitrogen content in gas product and pyrolysis char while the content in pyrolysis oil increased. Reducing the moisture content can improve the pyrolysis efficiency. It caused the content of nitrogen compounds in the pyrolysis oil increased and promotes the migration of nitrogen elements to the liquid phase. During the drying of traditional Chinese medicine residues, the content of alkali metals was reduced, which affected the composition of pyrolysis oil. Increasing the pyrolysis rate can also affect the pyrolysis product composition and nitrogen distribution to a certain extent. This study could provide a theoretical basis for the development of pyrolysis technology of Chinese medicinal residues.

Key words: Chinese medicine residue, Pyrolysis, Moisture content, Pyrolysis rate, Temperature, N Element distribution