Energy analysis of a lignite predrying power generation system with an efficient waste heat recovery system

被引：13

作者：

Zhu, Xin ^{[1
]}

Wang, Chang'an ^{[1
]}

Tang, Chunli ^{[1
]}

Che, Defu ^{[1
]}

机构：

[1] Xi An Jiao Tong Univ, Sch Energy & Power Engn, State Key Lab Multiphase Flow Power Engn, Xian 710049, Shaanxi, Peoples R China

来源：

DRYING TECHNOLOGY | 2017年 / 35卷 / 12期

基金：

中国国家自然科学基金;

关键词：

Absorption heat pump; fluidized-bed drying; lignite drying; power plant; waste heat recovery; LOW-RANK COALS; PILOT ROTARY DRYER; FLUIDIZED-BED; AIR-TEMPERATURE; PART; PLANT; PUMP; DESIGN; INTEGRATION; PARTICLES;

D O I：

10.1080/07373937.2016.1256891

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Lignite has been extensively used for electricity generation in many regions worldwide. However, its high water content has obviously negative effect on plant thermal efficiency. Performance of lignite-fired power plant can be improved by predrying the lignite before combustion. In addition, recovery of waste heat from the dryer and the power generation system will enhance the plant thermal efficiency further. In the present study, a new lignite predrying power generation system integrated with an efficient waste heat recovery system was proposed. Both dryer exhaust waste heat and steam turbine exhaust latent heat were recovered to heat boiler feed water. Energy analysis indicates that system performance is improved significantly. The plant thermal efficiency increases linearly with drying degree and then increases at a lower rate. The generation of unused dryer exhaust changes the variation tendency of system performance with drying degree.

引用

页码：1492 / 1505

页数：14

共 41 条

[1]

Abrahamsson K, 1997, INT J ENERG RES, V21, P631

[2]

[Anonymous], 2001, HDB FUNDAMENTALS

[3] Life cycle assessment of an energy-system with a superheated steam dryer integrated in a local district heat and power plant. [J].