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一种普适性电厂节能技术:原煤低温预干燥
  • ISSN号:1674-7607
  • 期刊名称:《动力工程学报》
  • 时间:0
  • 分类:TK11[动力工程及工程热物理—热能工程]
  • 作者机构:华北电力大学国家火力发电工程技术研究中心,北京102206
  • 相关基金:国家重点基础研究发展计划(973)资助项目(2015CB251504);国家自然科学基金资助项目(51476053,51436006)
中文摘要:

针对燃煤电厂提出一种原煤低温预干燥技术,并讨论了采用该干燥技术后燃煤电厂在设备和辅机电耗方面的变化.通过理论推导得出原煤中水分对原煤低位发热量及机组热力学性能的影响.以典型的原煤低位发热量和供电效率为例,计算分析了不同低位发热量的原煤采用不用程度的低温预干燥后自身低位发热量的变化,以及对不同机组供电煤耗率的影响.结果表明:如采用电厂废热干燥原煤且不考虑辅机电耗,煤中水分相对于干燥前每降低1%,可使低位发热量上升1.2%~1.5%,供电煤耗率下降0.3~0.6g/(kW·h),节能效果显著;原煤低温预干燥系统简单、投资可控,是一种极具潜力的普适性电厂节能技术.

英文摘要:

A concept of low-temperature coal pre-drying was proposed for coal-fired power plants, while the changes in equipment configuration and auxiliary power consumption were discussed after application of the pre-drying technology. The effects of moisture content in coal on its low heating value (LHV) and on thermodynamic performance of the unit were comprehensively analyzed. Taking the low heating value of typical raw coal and the coal consumption rate of power supply as an example, their changes after application of low-temperature coal pre-drying were calculated. Results show that the LHV of coal would be increased by 1.2%-1.5% and the coal consumption rate would be reduced by 0.3-0.6 g/(kW · h), for every 1% drop of moisture content in coal, using waste heat as the drying source, without considering the energy consumption of auxiliaries, indicating remarkable energy-saving effects. Featured by simple structure and controllable investment, the low-temperature coal pre-drying technology is a very promising and effective energy-saving method, which is universally applicable to coal-fired power plants.

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期刊信息
  • 《动力工程学报》
  • 中国科技核心期刊
  • 主管单位:上海发电设备成套设计研究院
  • 主办单位:上海上发院发电成套设备成套设备工程有限公司 中国动力工程学会
  • 主编:严宏强
  • 地址:上海闵行剑川路1115号
  • 邮编:200240
  • 邮箱:DONG@chinajournal.net.cn
  • 电话:021-64358710-609
  • 国际标准刊号:ISSN:1674-7607
  • 国内统一刊号:ISSN:31-2041/TK
  • 邮发代号:4-301
  • 获奖情况:
  • 2000年获《CAJ-CD规范》执行优秀奖
  • 国内外数据库收录:
  • 美国化学文摘(网络版),荷兰文摘与引文数据库,美国剑桥科学文摘,日本日本科学技术振兴机构数据库,中国中国科技核心期刊,中国北大核心期刊(2004版),中国北大核心期刊(2008版),中国北大核心期刊(2011版),中国北大核心期刊(2014版)
  • 被引量:3107