600MW直接空冷机组抽汽预干燥褐煤的热经济性分析

华电技术 ›› 2016, Vol. 38 ›› Issue (9): 48-51.

600MW直接空冷机组抽汽预干燥褐煤的热经济性分析

神华国能蒙东能源有限公司，内蒙古呼伦贝尔〓021000

出版日期:2016-09-25

Thermoeconomic analysis of steam extraction predried lignite for 600MW direct air cooled generating unit

Shenhua Guoneng Mengdong Energy Company Limited, Hulun Buir 021000, Chin

Published:2016-09-25

摘要/Abstract

摘要：

摘要：褐煤水分高、热值低，对褐煤进行预干燥可以提升煤质，进而可提高电站锅炉热效率、降低发电煤耗。以某超临界600MW燃烧褐煤的直接空冷发电机组为例，建立了抽汽预干燥褐煤发电系统的热经济性分析模型。主蒸汽流量一定，褐煤收到基水分由38.4%干燥至15.0%时，锅炉的热效率由91.5%提升至92.9%，节约湿褐煤22g/(kW·h)。

关键词:

关键词：燃煤电站, 直接空冷机组, 褐煤预干燥, 热经济性

Abstract:

Abstract:Lignite has the characteristics of high moisture and low heat value, thus it could improve the quality of lignite through predrying treatment, and then improve the thermal efficiency of boiler and reduce the coal consumption of power generation. Taking a certain lignitefired 600MW super critical direct aircooled generating unit as an example, this paper built a thermoeconomic analysis model for steam extraction predried lignitefired power system. Under the condition of fixed main steam flow, when the moisture(as received basis) of lignite decreased from 38.4% to 15.0%, the thermal efficiency of boiler increased from 91.5% to 92.9%, which saved wet lignite 22g/(kW·h).

Key words:

Keywords:coalfired power station, direct aircooled generating unit, lignite predrying, thermoeconomy

张利，张义江. 600MW直接空冷机组抽汽预干燥褐煤的热经济性分析[J]. 华电技术, 2016, 38(9): 48-51.

ZHANG Li, ZHANG Yijiang.

Thermoeconomic analysis of steam extraction predried lignite for 600MW direct air cooled generating unit

[J]. Huadian Technology, 2016, 38(9): 48-51.

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