预干燥燃褐煤发电系统理论研究

严俊杰 1; 刘明 1; 种道彤 1; 肖峰 2

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预干燥燃褐煤发电系统理论研究

更新时间：2025-05-08

- 预干燥燃褐煤发电系统理论研究
- Theoretical Study on Pre-Dried Lignite-Fired Power Generation System
- 西安交通大学学报 2011年45卷第5期页码：1-5+58
- 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：
  
  : 2010-10-11. 作者简介: 严俊杰(1967-),男,教授,博士生导师. 基金项目: 国家重点基础研究发展规划资助项目(2009CB219803)
- DOI：
  中图分类号： TK11
- 网络首发：2011-05-10，
  
  纸质出版：2011
- 稿件说明：
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严俊杰 1, 刘明 1, 种道彤 1, 等. 预干燥燃褐煤发电系统理论研究[J]. 西安交通大学学报, 2011,45(5):1-5+58.

Theoretical Study on Pre-Dried Lignite-Fired Power Generation System[J]. 2011, 45(5): 1-5+58.
严俊杰 1, 刘明 1, 种道彤 1, 等. 预干燥燃褐煤发电系统理论研究[J]. 西安交通大学学报, 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.

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Keywords

references

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