CIESC Journal ›› 2023, Vol. 74 ›› Issue (10): 4302-4310.DOI: 10.11949/0438-1157.20230641

• Energy and environmental engineering • Previous Articles     Next Articles

Optimum design and performance analysis of waste heat recovery system for biomass fermentation

Wei HE1,3(), Yongna CAO2,3, Hongru SHANG1, Yinxue LI3, Chao GUO4, Yanling YU1,3()   

  1. 1.School of Chemical Engineering and Chemistry, Harbin Institute of Technology, Harbin 150001, Heilongjiang, China
    2.Elite Engineers School, Harbin Institute of Technology, Harbin 150001, Heilongjiang, China
    3.Harbin Institute of Technology Zhengzhou Research Institute, Zhengzhou 450003, Henan, China
    4.Institute for Carbon Neutrality, Heilongjiang Construction Group Co. , Ltd. , Harbin 150001, Heilongjiang, China
  • Received:2023-06-28 Revised:2023-08-30 Online:2023-12-22 Published:2023-10-25
  • Contact: Yanling YU

生物质发酵余热回收系统优化设计与性能分析

贺巍1,3(), 曹永娜2,3, 尚宏儒1, 李崯雪3, 郭超4, 于艳玲1,3()   

  1. 1.哈尔滨工业大学化工与化学学院,黑龙江 哈尔滨 150001
    2.哈尔滨工业大学卓越工程师学院,黑龙江 哈尔滨 150001
    3.哈尔滨工业大学郑州研究院,河南 郑州 450003
    4.黑龙江省建设投资集团有限公司碳中和研究院,黑龙江 哈尔滨 150001
  • 通讯作者: 于艳玲
  • 作者简介:贺巍(2002—),男,硕士研究生,1074992253@qq.com
  • 基金资助:
    生物质资源化-哈工大郑州研究院成果产业化项目(ZRI-RZ-2022-013)

Abstract:

In order to solve the problem that the waste heat generated by biomass aerobic fermentation is difficult to be effectively recovered, with corn straw as the main raw material and using heat exchange method, a 100 L scale fermentation device and heat recovery system were built to recover the apparent heat and latent heat in the compost steam. The electric heating method is used to simulate aerobic fermentation heat production. The waste heat recovery process was optimized from the aspects of fluid flow, equipment insulation, water storage and heat transfer area. The heat production and heat recovery effect of the optimized system were tested. The results indicate that fluid flow rate, water tank insulation, and storage capacity have a significant impact on the heat recovery performance of the system. In the simulated heat production mode, the tank temperature can rise from 17℃ to more than 40℃. Finally, through the intermittent heat recovery method, the balanced heat recovery efficiency of the system reaches more than 57%, and the average heat recovery power reaches more than 274 kJ/h, realizing the efficient recovery of fermentation waste heat.

Key words: bioenergy, corn straw, aerobic, fermentation, heat transfer, waste heat recovery, heat exchanger

摘要:

为了解决生物质好氧发酵热能难以有效回收的问题,以玉米秸秆为主要原料,采用热交换法,搭建了100 L规模发酵装置和热回收系统,用于回收堆肥蒸汽中的显热和潜热。利用电加热方式模拟好氧发酵产热,从流体流量、设备保温、蓄水量和换热面积多个方面对余热回收工艺进行优化设计,并测试了优化后系统的产热和热回收效果。结果表明,流体流量、水箱保温和蓄水量对系统热回收性能影响较大。在模拟产热方式下,水箱温度能够从17℃升至40℃以上。最终,采用间歇性热回收方式,系统平衡热回收效率达到57%以上,平均热回收功率达到274 kJ/h以上,实现了发酵余热的高效回收。

关键词: 生物能源, 玉米秸秆, 需氧, 发酵, 传热, 余热回收, 换热器

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