混风对环冷机双压发电性能影响的研究  

Study of the Effect of Mixed Air on the Performance of Annular Cooler with Dual-Pressure Generation

作　　者：吴畏[1] 刘云 陈仕 WU Wei;LIU Yun;CHEN Shi(Hunan Xiangtan Iron and Steel Co.,Ltd.,Xiangtan,Hunan 411101,China)

机构地区：[1]湖南华菱湘潭钢铁有限公司,湖南湘潭411101

出　　处：《冶金动力》2024年第6期1-5,共5页Metallurgical Power

摘　　要：环冷机余热发电系统通常采用双压发电的模式,多流路系统不同烟气段混风的影响更复杂。通过建立相关的漏风对比数学模型,定义混风比和新风侵占调节两个参数,计算不同参数下余热发电系统受到的影响。计算结果显示,初始温度越低混风影响越大,且新风侵占导致的得热损失更严重。高温烟气段混风的影响显著,中温烟气段混风影响则不大,定性分析显示同样混风比数值时,两种情况下产生的蒸汽发电效率相差一个数量级。由此可见,引风机硬件设备的预留余量、漏风抑制,特别是高温段混风的最大程度减免、引风优化控制调节等措施,可以有效提升环冷机双压发电系统的性能。Annular cooler waste heat power generation system usually adopts the mode of dual-pressure power generation,and the influence of air mixing in different flue gas sections of multi-flow path system is more complicated.By establishing the relevant leakage comparison math⁃ematical model and defining two parameters,namely,mixing ratio and fresh air encroachment regu⁃lation,the impact on the waste heat power generation system under different parameters is calcu⁃lated.Calculations show that the lower the initial temperature,the greater the effect of air mixing,and the heat loss due to fresh air encroachment is more serious.The effect of air mixing in the high-temperature flue gas section is significant,while that in the medium-temperature flue gas section is not significant,and qualitative analysis shows that there is an order of magnitude difference in the reduction ratio of steam generation efficiency between the two cases for the same value of air mixing ratio.It can be seen that measures such as margin reservation of induced draft fan hardware equip⁃ment,air leakage suppression,especially the maximum reduction of air mixing in the high tempera⁃ture section,and optimal control and regulation of induced draft fan can effectively improve the per⁃formance of the dual-pressure power generation system of the annular cooler.

关 键 词：环冷机 双压余热发电 混风比 

分 类 号：TM617[电气工程—电力系统及自动化]