
第 27 卷第 5 期 高 校 化 学 工 程 学 报 No.5
Vol.27
2013 年 10 月 Journal of Chemical Engineering of Chinese Universities Oct.
2013
文章编号:1003-9015(2013)05-0798-07
小型流化床燃煤自供热煤催化气化特性研究
毛燕东
1,2
, 李克忠
2
, 孙志强
2
, 毕继诚
2
, 辛 峰
1
, 李金来
2
(1. 天津大学 化工学院, 天津 300072; 2. 新奥集团 煤基低碳能源国家重点实验室, 河北 廊坊 065001)
摘 要:在内耐火衬式流化床中,采用负载不同碱金属及配比催化剂的煤粉为原料,研究了煤粉催化气化过程,探索
了自热方式为催化气化过程提供足够反应热的可能性,获得了维持煤气化装置连续稳定运行的工艺条件。经实验研究
发现,通过燃煤自供热可为催化气化过程提供所需的能量,并维持炉温在所需温度范围;添加碱金属催化剂后,煤粉
对应的着火温度有明显降低,且钾盐对煤粉着火点影响比钠盐显著。同时,催化剂负载量存在一个最佳值;添加催化
剂后,维持系统稳定操作的温度范围降低了 100~200℃,控制炉温在低于该温度范围内操作,可有效减少结渣;负载
催化剂后在较低的气化温度下可实现较高的碳转化率和气化效率,实现装置的连续稳定运行。燃煤自供热的流化床催
化气化装置的构建及开发,将解决现有催化气化技术经济性不佳及工程放大难的问题。
关键词:流化床;煤;催化气化;碱金属;燃煤自供热;稳定运行
中图分类号:TQ 515.6;TQ511.6
文献标识码:A DOI:10.3969/j.issn.1003-9015.2013.05.012
Characteristics of Catalytic Coal Gasification in Lab Scale Autothermal Fluidized Bed
MAO Yan-dong
1,2
, LI Ke-zhong
2
, SUN Zhi-qiang
2
, BI Ji-cheng
2
, XIN Feng
1
, LI Jin-lai
2
(1. School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China;
2. State Key Lab of Coal-based Low Carbon Energy, Enn Technology & Development Co. Ltd,
Langfang 065001, China)
Abstract: The catalytic coal gasification over catalysts with different species and loadings of alkali metals
was carried out autothermally in a fluidized bed gasifier with refractory lining. The feasibility of using burning
coal to provide enough reaction heat for the catalytic gasification and the operating conditions for keeping
steady state running were studied. The results obtained are as following: the heat provided by burning coal can
provide the required reaction heat for catalytic coal gasification process and maintain the gasifier temperature in
an accepted range; adding alkali-metal compound as catalyst, the ignition temperature of coal decreases
obviously, the K-Salt affects the ignition temperature more than the Na-Salt, and there is an optimal catalyst
loading. The controllable operation temperature range of catalytic gasification is 100~200℃ lower than that of
without catalysts, when the gasifier is operated in above lower temperature ranges, the slagging can be reduced
effectively and the continuously stable operation of the unit can be realized. Adding catalyst can achieve higher
carbon conversion and gasification efficiency in lower temperature range. The construction and development of
the autothermal gasification unit would solve the existed problems of existent catalytic gasification, such as the
unfavored technical economy and difficulty of realizing scale up. The research on material balance, energy
balance, reaction and flow characteristics of catalytic coal gasification process with autothermal fluidized bed
can support its actual engineering scale-up design and operation.
Key words: fluidized bed; coal; catalytic gasification;alkali metals; autothermal process;
steady state operation
1 引 言
煤气化是实现煤炭洁净和高效利用的主要方法,煤催化气化技术可有效降低反应温度、提高反应速
收稿日期:2012-06-19;修订日期:2012-10-09。
基金项目:国家科技支撑计划(2009BAA25B00);973 计划(2011CB201305);国际科技合作专项(2011DFA60610)。
作者简介:毛燕东(1984-),女,河北廊坊人,新奥集团工程师,天津大学博士生。通讯联系人:毛燕东,E-mail:myd0514@126.com