化工进展 ›› 2018, Vol. 37 ›› Issue (03): 875-883.DOI: 10.16085/j.issn.1000-6613.2017-1158

• 化工过程与装备 • 上一篇    下一篇

热负荷分配比例对抽凝-背压供热机组能耗影响

杨志平, 时斌, 李晓恩, 王宁玲   

  1. 华北电力大学国家火力发电工程技术研究中心, 北京 102206
  • 收稿日期:2017-06-13 修回日期:2017-07-16 出版日期:2018-03-05 发布日期:2018-03-05
  • 通讯作者: 杨志平(1968-),男,高级工程师,研究方向为火电机组热力系统优化、热电联产系统节能与优化。
  • 基金资助:
    国家科技支撑计划(2014BAA06B02)及国家重点基础研究发展计划(2015CB251505)项目。

Impacts of heat load distribution ratio on energy consumption of extraction steam-high back pressure heating cogeneration unit

YANG Zhiping, SHI Bin, LI Xiao'en, WANG Ningling   

  1. National Thermal Power Engineering & Technology Research Center, North China Electric Power University, Beijing 102206, China
  • Received:2017-06-13 Revised:2017-07-16 Online:2018-03-05 Published:2018-03-05

摘要: 抽凝-背压供热模式是实现能量梯级利用、降低火力发电煤耗的有效途径,研究不同室外温度下供热凝汽器与尖峰加热器热负荷分配比例对机组能耗的影响,确定最佳热负荷分配比例,是抽凝-背压供热机组节能降耗的核心问题之一。本文利用热网变工况模型及Ebsilon软件仿真,以某310MW抽凝-背压供热机组为研究对象,分析了供热期不同温度下供热凝汽器与尖峰加热器热负荷分配比例不同时机组的发电功率及煤耗。结果表明:对于抽凝-背压热电联产机组,并非供热凝汽器热负荷比例越高而发电功率越高,供热期不同阶段,机组发电功率随供热凝汽器热负荷变化呈现不同规律;相同室外温度下,供热凝汽器与尖峰加热器热负荷分配比例对机组能耗影响很大,凝汽器热负荷比例不同时,其极差最小值和最大值分别为2.02g/(kW·h)和5.50g/(kW·h)。

关键词: 抽凝-背压供热, 能量梯级利用, 节能降耗, 发电煤耗率, 热负荷分配

Abstract: Using extraction steam-high back pressure heating mode is an effective way to achieve energy cascade utilization and reduce the coal consumption rate in cogeneration units. In a cogeneration power plant,a key issue for energy saving is to determine the optimal value of heat load distribution ratio between heating condenser and peak load heater,based on the power plant energy consumption variation resulting from the heat load distribution ratio between heating condenser and peak load heater. The output power was simulated by using Ebsilon platform,and coal consumption were calculated under conditions with different heat load distribution ratios. Results showed that heat load distribution ratio greatly affects cogeneration unit energy consumption. The variation of coal rate range is from 2.02g/(kW·h) to 5.50g/(kW·h),due to the change of heat load distribution ratio between heating condenser and peak load heater. The relations between the output power and heating condenser heat load distribution ratio varies with heating stages.

Key words: extraction steam-high back pressure heating, energy cascade utilization, energy saving, coal consumption, heat load distribution

中图分类号: 

京ICP备12046843号-2;京公网安备 11010102001994号
版权所有 © 《化工进展》编辑部
地址:北京市东城区青年湖南街13号 邮编:100011
电子信箱:hgjz@cip.com.cn
本系统由北京玛格泰克科技发展有限公司设计开发 技术支持:support@magtech.com.cn