摘要
近年来,褐煤提质技术的发展使得褐煤的高效利用成为可能。基于一种先进的褐煤干燥技术—内部废热利用流化床干燥(wirbelschicht-trocknung mit interner abw rmenu-tzung,WTA),采用ASPEN Plus软件及美国电力研究协会(electric power research institute,EPRI)的技术评价准则(technical assessment guide,TAG),分别对烟煤整体煤气化联合循环(integrated gasification combined cycle,IGCC)电站和褐煤IGCC电站进行技术经济性分析。详细介绍了WTA单元及燃气轮机变工况的建模方法。计算结果表明,引入WTA技术后,褐煤IGCC电站的发电效率比采用传统干燥方式时约提高4.6个百分点,整体性能与烟煤IGCC电站相差不大;而褐煤IGCC电站的发电成本比烟煤IGCC电站低24.4%。高效的褐煤干燥技术能显著提高褐煤IGCC电站的效率,而褐煤低廉的价格又对降低发电成本十分有利,褐煤很可能成为比烟煤更适合IGCC的燃料。
The development of lignite upgrading has enabled the efficient utilization of lignite recently.Based on the description of an advanced lignite drying techniquewirbelschicht-trocknung mit interner abw rmenutzung（WTA）,techno-economic analysis of two integrated gasification combined cycle（IGCC） systems employing bituminous and lignite were performed by using ASPEN Plus software and the EPRI technical assessment guide.The WTA model and gas turbine off-design model were explained in detail.The result shows that pre-drying lignite by WTA can increase the net thermal efficiency of lignite IGCC power plant by up to 4.6% points compared to traditional lignite drying technology,making the performance of lignite IGCC as good as bituminous IGCC;but the cost of electricity of lignite IGCC is 24.4% lower than that of bituminous IGCC.Advanced drying technique can improve the performance of lignite IGCC and lignite’s cheap price helps to bring down the cost of electricity.Therefore lignite is perhaps a more suitable feed for IGCC power plant than bituminous.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2012年第5期39-47,共9页
Proceedings of the CSEE
