发电技术 ›› 2024, Vol. 45 ›› Issue (3): 535-544.DOI: 10.12096/j.2096-4528.pgt.23031

• 发电及环境保护 • 上一篇    下一篇

农林废弃物循环流化床空气气化特性实验研究

高忠明1, 朱德敖2, 陈雨佳2, 刘三举1, 王勤辉2   

  1. 1.湖北华电襄阳发电有限公司,湖北省 襄阳市 441000
    2.能源清洁利用国家重点实验室(浙江大学),浙江省 杭州市 310027
  • 收稿日期:2023-03-09 修回日期:2023-07-03 出版日期:2024-06-30 发布日期:2024-07-01
  • 作者简介:高忠明(1971),男,工程师,研究方向为电力生产及热能研究,1270499028@qq.com
    朱德敖(1998),男,博士研究生,研究方向为生物质气化,zda1004@zju.edu.cn
    陈雨佳(1993),男,硕士,工程师,研究方向为生物质流化床气化技术的工程应用研究及电子设备热管理,woshichenyj@163.com
    刘三举(1973),男,高级工程师,研究方向为电厂锅炉检修、生物质气化及综合利用等,273117259@qq.com
    王勤辉(1969),男,博士,教授,主要从事煤及生物质热解气化燃烧高效综合利用、气固两相流动特性测试及碳减排等技术的研发及应用,qhwang@zju.edu.cn
  • 基金资助:
    中央高校基本科研业务费(2022ZFJH004)

Experimental Study on the Air Gasification Characteristics of Agricultural and Forestry Waste in a Circulating Fluidized Bed

Zhongming GAO1, Deao ZHU2, Yujia CHEN2, Sanju LIU1, Qinhui WANG2   

  1. 1.Hubei Huadian Xiangyang Power Generation Co. , Ltd. , Xiangyang 441000, Hubei Province, China
    2.State Key Lab of Clean Energy Utilization (Zhejiang University), Hangzhou 310027, Zhejiang Province, China
  • Received:2023-03-09 Revised:2023-07-03 Published:2024-06-30 Online:2024-07-01
  • Supported by:
    Fundamental Research Funds for the Central Universities(2022ZFJH004)

摘要:

目的 考察生物质种类在不同参数下对循环流化床空气气化特性的影响,为宽燃料适应性的生物质循环流化床气化技术和生物质气化耦合燃煤发电技术提供相关数据参考。 方法 在自行搭建的小型常压循环流化床气化实验装置上,开展了以空气当量比(equivalent ratio,ER)、气化温度为参数,农林废弃物(稻壳、木屑、玉米秸秆和稻草)为原料的空气气化实验研究。 结果 稻壳、木屑、玉米秸秆和稻草气化气组分在不同空气当量比下的变化规律基本一致,随着空气当量比不断增加,稻壳、木屑、玉米秸秆和稻草的气化燃气低位热值和冷煤气效率均呈现先增后减的变化趋势,对于稻壳、木屑和玉米秸秆,ER为0.20时均为最优工况,最高冷煤气效率分别为46.19%、38.07%和37.71%;而对于稻草,ER为0.25时为最优工况,最高冷煤气效率可达39.55%;稻壳、木屑、玉米秸秆和稻草气化气组分中的三大可燃气体(CH4、CO、H2)在不同气化温度下的变化规律也一致,随着气化温度不断升高,稻壳、木屑、玉米秸秆和稻草的气化燃气低位热值和冷煤气效率也均呈现先增后减的变化趋势,其中稻壳和玉米秸秆冷煤气效率在气化温度为750 ℃时达到峰值,分别为46.19%和37.71%,而木屑和稻草在气化温度为760 ℃时达到峰值,分别为38.07%和37.56%。 结论 研究结果可为宽燃料适应性的生物质循环流化床气化技术和生物质气化耦合燃煤发电技术提供相关数据参考。

关键词: 农林废弃物, 生物质, 循环流化床, 空气气化, 空气当量比

Abstract:

Objectives The effects of biomass types on the air gasification characteristics of circulating fluidized bed under different parameters were investigated, so as to provide relevant data reference for biomass circulating fluidized bed gasification technology with wide fuel adaptability and biomass gasification coupled coal-fired power generation technology. Methods An experimental study of air gasification with air equivalent ratio (ER) and gasification temperature as parameters and agricultural and forestry waste (rice husk, sawdust, corn stalk and rice straw) as feedstock, was carried out on a small atmospheric circulating fluidized bed. Results The change patterns of syngas components for rice husk, sawdust, corn stalk and rice straw at different air equivalent ratios are basically the same. When the air equivalent ratio increases, both the low calorific value and cold gas efficiency of syngas for rice husk, sawdust, corn stalk and rice straw have an increasing-decreasing trend. For the rice husk, sawdust and corn stalk, ER=0.20 is the optimum operating condition, and the highest cold gas efficiency is respectively 46.19%, 38.07%, and 38.07%. However, for rice straw, ER=0.25 is the optimum operating condition, and the maximum cold gas efficiency can reach 39.55 %. The change patterns of the three combustible gases (CH4, CO, H2) in the syngas components for rice husk, sawdust, corn stalk and rice straw is also consistent at different gasification temperatures. When the gasification temperature increases, the low calorific value and cold gas efficiency of syngas for rice husk, sawdust, corn stalk and rice straw also show an increasing-decreasing trend. For rice husk and corn stalk, T=750 ℃ is the optimum operating condition, and the highest cold gas efficiency is respectively 46.19% and 37.71%. However, for sawdust and rice straw, T=760 ℃ is the optimum operating condition, and the maximum cold gas efficiency can reach respectively 38.07% and 37.56%. Conclusions It can provide relevant data reference for biomass circulating fluidized bed gasification technology with wide fuel adaptability and biomass gasification coupled coal-fired power generation technology.

Key words: agricultural and forestry waste, biomass, circulating fluidized bed, air gasification, air equivalent ratio

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