Theoretical Study on Pre-Dried Lignite-Fired Power Generation System

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Theoretical Study on Pre-Dried Lignite-Fired Power Generation System

更新时间：2025-05-08

- Theoretical Study on Pre-Dried Lignite-Fired Power Generation System
- Vol. 45, Issue 5, Pages: 1-5+58(2011)
- 作者机构：
  
  西安交通大学动力工程多相流国家重点实验室,西安,710049
- 作者简介：
- 基金信息：
- DOI：
  CLC： TK11
- Online First：10 May 2011，
  
  Published：2011
- 稿件说明：
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Theoretical Study on Pre-Dried Lignite-Fired Power Generation System[J]. 2011, 45(5): 1-5+58.
DOI：

Theoretical Study on Pre-Dried Lignite-Fired Power Generation System[J]. 2011, 45(5): 1-5+58. DOI：

摘要

利用等效热降法建立了回热抽汽预干燥燃褐煤发电系统的经济性分析模型

并给出了褐煤预干燥的节煤条件.利用该模型对某600 MW机组采用回热抽汽预干燥燃褐煤发电系统的热效率影响因素进行了分析.计算结果表明:采用该系统在额定工况下节煤量为11.21 g·(kW·h)

-1

; 烟气温度每变化10 ℃节煤量约变化1.5 g·(kW·h)

-1

; 从1 kg褐煤中每多干燥出0.1 kg水节煤量增加3.3 g·(kW·h)

-1

; 从褐煤中干燥出1 kg水分需要的蒸汽量越少

热经济性越好

并且褐煤的干燥程度越高

其对经济性的影响越明显.

Abstract

A theoretical economy analysis model for a lignite-fired power generation system was established on the basis of the equivalent heat drop method. The energy saving condition of lignite pre-drying with steam of the reheat system was stated. A case study on a 600 MW power generation system was conducted to analyze the factors influencing thermal efficiency. The results show that the system can reduce the coal consumption rate by 11.21 g·(kW·h)

-1

under the rated condition. When the boiler exhaust temperature increases by every 10 ℃

the coal consumption rate will decline by about 1.5 g·(kW·h)

-1

because of lignite pre-drying. The coal consumption rate will decrease by about 3.3 g·(kW·h)

-1

when every 0.1 kg more water escapes from 1 kg lignite. The thermal economy rises with the decrease in the steam amount used for 1 kg moisture to escape from lignite

and the influence on the ther

mal economy is more obvious when the lignite is per-dried better.

关键词

Keywords

references

HATZILYBERIS K S, ANDROUTSOPOULOS G P. An RTD study for the flow of lignite particles through a pilot rotary dryer: part I Bare drum case [J]. Drying Technology, 1999,17(4/5): 745-757.

HATZILYBERIS K S, ANDROUTSOPOULOS G P. An RTD study for the flow of lignite particles through a pilot rotary dryer: part II Flighted drum case [J]. Drying Technology, 1999, 17(4/5): 759-774.

CALBAN T, ERSAHAN H. Drying of a Turkish lignite in a batch fluidized bed [J]. Energy Sources, 2003, 25(12): 1129-1135.

HOEHNE O, LECHNER S, SCHREIBER M, et al. Drying of lignite in a pressurized steam fluidized bed-theory and experiments [J]. Drying Technology, 2010, 28(1): 5-19.

HATZILYBERIS K S, ANDROUTSOPOULOS G P, SALMAS C E. Indirect thermal drying of lignite: design aspects of a rotary dryer [J]. Drying Technology, 2000, 18(9): 2009-2049.

CALBAN T. The effects of bed height and initial moisture concentration on drying lignite in a batch fluidized bed [J]. Energy Sources: Part A Recovery Utilization and Environmental Effects, 2006, 28(5): 479-485.

SALMAS C E, TSETSEKOU A H, HATZILYBRIS K S, et al. Evolution lignite mesopore structure during drying effect of temperature and heating time [J]. Drying Technology, 2001, 19(1): 35-64.

AGRANIOTIS M, GRAMMELIS P, PAPAPAVLOU C, et al. Experimental investigation on the combustion behaviour of pre-dried Greek lignite[J]. Fuel Processing Technology, 2009, 90(9): 1071-1079.

AGRANIOTIS M, STAMATIS D, GRAMMELIS P, et al. Numerical investigation on the combustion behaviour of pre-dried Greek lignite [J]. Fuel, 2009, 88(12): 2385-2391.

KAKARAS E, AHLADAS P, SYRMOPOULOS S. Computer simulation studies for the integration of an external dryer into a Greek lignite-fired power plant [J]. Fuel, 2002,81(5): 583-593.

王海锋,朱书全,任红星,等.通辽褐煤在流化床干燥器中的干燥特性研究[J].选煤技术,2007,4(4):43-47.

WANG Haifeng, ZHU Shuquan, REN Hongxing, et al.Drying characteristics research of Tongliao lignite in fluidized bed drier [J].Coal Preparation Technology,2007,4(4):43-47.

李先春,余江龙,胡广涛,等.印尼褐煤干燥和水分再吸收特性的试验研究[J].现代化工,2009,29(S1):5-7.

LI Xianchun,YU Jianglong,Hu Guangtao,et al.Lignite dehydration and predrying technology [J].Modern Chemical Industry,2009,29(S1):5-7.

赵卫东,刘建忠,周俊虎,等.褐煤等温脱水热重分析[J].中国电机工程学报,2009,29(14):74-79.

ZHAO Weidong, LIU Jianzhong, ZHOU Junhu,et al.Investigation on the isothermal dewatering of brown coal by thermobalance [J].Proceedings of the CSEE,2009,29(14):74-79.

阎维平,马凯,李春启,等.褐煤干燥对电厂经济性的影响[J].中国电力,2010,43(3):35-37.

YAN Weiping,MA Kai,LI Chunqi,et al.Economical effect of lignite coal drying on coal-fired electric power plant [J].Electric Power,2010,43(3):35-37.

林万超. 火电厂热系统节能理论[M]. 西安: 西安交通大学出版社, 1994.

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