下吸式固定床的生物质O2/CO2分段气化流程模拟

doi:10.19912/j.0254-0096.tynxb.2020-1068

太阳能学报 ›› 2022, Vol. 43 ›› Issue (6): 239-245.DOI: 10.19912/j.0254-0096.tynxb.2020-1068

下吸式固定床的生物质O₂/CO₂分段气化流程模拟

郑志行¹, 张家元¹, 李俊宇¹, 龚卡¹, 罗晓倩¹, 李谦²

1.中南大学能源科学与工程学院,长沙 410083;
2.中冶长天国际工程有限责任公司国家烧结球团装备系统工程技术研究中心,长沙 410205

收稿日期:2020-10-10 出版日期:2022-06-28 发布日期:2022-12-28
通讯作者: 李谦（1991—）,男,博士、工程师,主要从事生物质热解气化技术方面的研究。liqiancie@163.com
基金资助:
湖南省自然科学基金（2020JJ5994）

PROCESS SIMULATION OF BIOMASS O₂/CO₂ STAGED GASIFICATION IN DOWNDRAFT FIXED BED

Zheng Zhihang¹, Zhang Jiayuan¹, Li Junyu¹, Gong Ka¹, Luo Xiaoqian¹, Li Qian²

1. College of Energy Science and Engineering, Central South University, Changsha 410083, China;
2. National Engineering Research Center of Sintering and Pelletizing Equipment System, Zhongye Changtian International Engineering Co., Ltd., Changsha 410205, China

Received:2020-10-10 Online:2022-06-28 Published:2022-12-28

摘要/Abstract

摘要： 建立干桦木屑在下吸式固定床气化炉中的Aspen Plus气化模型,该模型预测煤气组成和煤气热值,与文献试验结果吻合良好。利用灵敏度分析模块模拟了氧碳比、CO₂/C对气化结果的影响,并提出O₂/CO₂分段气化流程,对比常规的CO₂气化特征,分析了CO₂/C对气化结果的影响。结果表明,纯氧气化时可获得高H₂和CO浓度的气化气,但其净CO₂排放量较高,氧碳比增加使碳转化率逐渐增加、冷煤气效率先增加后降低;CO₂作为气化剂时,随着CO₂/C的增加,净CO₂排放量逐渐减少,但碳转化率及冷煤气效率大幅降低;与常规CO₂气化相比,O₂/CO₂分段气化在保持低CO₂排放量的同时,可有效增加气化过程中的碳转化率及冷煤气效率。

关键词: 生物质, 灵敏度分析, 气化, Aspen Plus, 下吸式固定床

Abstract: An Aspen Plus gasification model for dry birch chips in a downdraft fixed-bed gasifier was developed, in which the predicted the gas composition and gas calorific value and agreement well with the literature results. The sensitivity analysis module was used to simulate the effects of oxygen carbon ratio and CO₂/C on gasification results, and the staging gasification process of O₂/CO₂ was proposed. Compared with the conventional CO₂ gasification characteristics, the influence of CO₂/C on gasification results was analyzed. The results show that the gasification gas with high H₂ and CO concentrations can be obtained with pure oxygen gasification, but its net CO₂ emission is high, and the carbon conversion ratio gradually increases and the cold gas efficiency first increases and then decreases with the increase of oxygen to carbon ratio. When CO₂ is used as gasification agent, the net CO₂ emission decreases gradually with the increase of CO₂/C, but the carbon conversion and cold gas efficiency decrease greatly. Compared with conventional CO₂ gasification, O₂/CO₂ staged gasification can effectively increase carbon conversion and cold gas efficiency while maintaining low CO₂ emission.

Key words: biomass, sensitivity analysis, gasification, Aspen Plus, downdraft fixed bed

中图分类号:

郑志行, 张家元, 李俊宇, 龚卡, 罗晓倩, 李谦. 下吸式固定床的生物质O₂/CO₂分段气化流程模拟[J]. 太阳能学报, 2022, 43(6): 239-245.

Zheng Zhihang, Zhang Jiayuan, Li Junyu, Gong Ka, Luo Xiaoqian, Li Qian. PROCESS SIMULATION OF BIOMASS O₂/CO₂ STAGED GASIFICATION IN DOWNDRAFT FIXED BED[J]. Acta Energiae Solaris Sinica, 2022, 43(6): 239-245.

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下吸式固定床的生物质O₂/CO₂分段气化流程模拟

PROCESS SIMULATION OF BIOMASS O₂/CO₂ STAGED GASIFICATION IN DOWNDRAFT FIXED BED

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