基于流化床热解的中药渣两段气化基础研究

汪印; 刘殊远; 任明威; 许光文

基于流化床热解的中药渣两段气化基础研究

1.
中国科学院过程工程研究所多相复杂系统国家重点实验室, 北京 100190;
2.
中国科学院城市环境研究所, 福建厦门 361021;
3.
中国海洋石油东方石化有限责任公司, 海南东方 572600

基金项目: 国家自然科学基金(51176197,21161140329,21006110,21006114);国家科技支撑项目(2012BAC03B05,2010BAC66B01);国家高技术研究发展计划(863计划,2012AA021401)。

详细信息

通讯作者:
汪印,许光文,Tel:010-82544886,E-mail:yinwang@iue.ac.cn,gwxu@home.ipe.ac.cn。

中图分类号: TQ546.2
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出版历程
- 收稿日期: 2012-08-06
- 修回日期: 2012-10-01
- 刊出日期: 2013-03-30

Fundamental study on Chinese herb residue pyrolysis and gasification by combining fluidized bed and fixed bed

1.
State Key Laboratory of Multi-Phase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China;
2.
Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China;
3.
CNOOC Dongfang Petrochemical Ltd. Dongfang 572600, China

摘要

摘要: 以中药渣为原料,研究了流化床热解和固定床半焦催化/重整焦油及半焦气化的特性,特别是对固定床重整前后焦油中组分的变化进行了分析。结果表明,随着热解气体在固定床半焦中停留时间从0 s延长到0.95 s,焦油中-OH、C-H、C-O、C=O和C=C官能团的含量显著减少,芳香类物质含量明显增加;向固定床中加入水蒸气后,焦油中芳香类、C-O和羟基-OH官能团的含量增加;而加入氧气后,焦油中羟基-OH、C-H、羰基C=O、C=C和C-O官能团物质含量变化不大,但芳烃类物质明显增多。虽然向固定床中加入水蒸气或氧气均能降低焦油含量,但水蒸气的作用稍弱,两者联合对焦油脱除和半焦气化效果更好,生成的燃气中基本不含焦油。
- 两段气化 /
- 中药渣 /
- 焦油裂解/重整 /
- 半焦催化
Abstract: The tar and char from a fluidized bed Chinese herb residue (CHR) pyrolysis were cracked and gasified in a fixed char bed. The change in chemical species of tar before and after passing through a fixed char bed was analyzed. The results show that increasing the residence time of tar and pyrolysis gas in the char bed from 0 s to 0.95 s causes a significant decrease in the chemical species containing -OH, C-H, C-O, C=O and C=C groups, but leads to an obvious increase in the aromatic species. Introducing steam into the char bed results in the formation of more species containing aromatic rings, C-O and -OH groups, while adding the oxygen to the atmosphere increases the amount of aromatic components but has little effect on the amount of species containing -OH, C-H, C=O, C=C and C-O. Both steam and oxygen are effective to remove tar from the gasification gas, but the effect of steam is relatively weaker. Introducing steam together with oxygen will have a rather higher tar removal efficiency, and the tar in the producer gas can be ignored.
- two-stage gasification /
- Chinese herb residue /
- tar cracking/reforming /
- char catalyst

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