期刊文献+

空预器冷端再热防堵技术的数值模拟研究及应用

Numerical Simulation and Application of Reheating Anti⁃blocking Technology in Cold Segment of Preheater
原文传递
导出
摘要 为了解决空预器堵塞问题,确定了以热二次风为热源的冷端再热防堵方案,其中再热分仓设置在二次风侧与烟气侧之间。搭建了空预器冷端再热数值计算模型,对50%BMCR工况下的冷端再热参数进行了数值模拟验证,并进行了实际改造应用。数值计算结果表明:50%BMCR工况下,再热风量为80 t/h时,可保证空预器再热分仓温度稳定在200℃以上,进而抑制硫酸氢铵沉积。实际应用结果表明:改造后,空预器差压可以长期维持1.0 kPa以下,同时降低排烟温度3~5℃,提高的一次风温、二次风温分别为2℃和3℃,提高了机组运行的经济性。 In order to solve the blocking problem of the air preheater,a cold segment reheating anti⁃blocking scheme with hot secondary air as the heat source was released,in which the reheat sub⁃silo was set between the secondary air silo and the flue gas silo.The numerical calculation model of the cold segment reheat is built,and the numerical simulation of the cold segment reheat parameters on the 50%BMCR condition are carried out,and the practical application has done.The numerical calculation results show that:on 50%BMCR condition,when the reheat air volume is 80t/h,the temperature of the air preheater reheat sub⁃silo can be guaranteed to be stable above 200℃,thereby inhibiting the deposition of am⁃monium hydrogen sulfate.The practical application results show that:after the transformation,the differential pressure of the air preheater can be maintained below 1.0kPa for a long time,while the exhaust gas temperature is reduced by 3~5℃.And the primary air temperature and the secondary air temperature are increased by 2℃and 3℃respectively,the transformation enhanced the economy of unit operation.
作者 杨占海 刘维元 马振方 杨伟光 张彦 张光学 YANG Zhan-hai;LIU Wei-yuan;MA Zhen-fang(Inner Mongolia Daban Power Generation Co.,Ltd;Hangzhou Xinji Energy Technology Co.,Ltd.;Hangzhou Yineng Power Technology Co.,Ltd)
出处 《电站系统工程》 2023年第5期5-7,11,共4页 Power System Engineering
关键词 硫酸氢氨 空预器堵塞 冷端再热 数值模拟 应用 ammonium hydrogen sulfate blocking of air preheater cold segment reheating numerical simulation application
  • 相关文献

参考文献16

二级参考文献60

  • 1钟礼金,宋玉宝.锅炉SCR烟气脱硝空气预热器堵塞原因及其解决措施[J].热力发电,2012,41(8):45-47. 被引量:115
  • 2陶文铨.数值传热学[M].西安:西安交通大学出版社,2010:28-39.
  • 3ZHANG L, CHE D. Influence of corrugation profile on the therma[hydraulic performance of cross-corrugated plates [J]. Journal of Numerieal Heat Transfer, Part A : Applications, 2011, 59(4) : 267 - 296.
  • 4FOCKE W W, ZACHARIADES J, OLIVIER I. The effect of the corrugation inclination angle on the ther- ma[hydraulic performance of plate heat exchangers [J]. International Journal of Heat and Mass Transfer, 1985, 28(8) : 1469 - 1479.
  • 5CIOFALO M, STASIEK J, COLLINS M W. Investiga- tion of flow and heat transfer in corrugated passages-II. numerical simulations [J]. International Journal of Heat and Mass Transfer, 1996, 39(1) : 165 - 192.
  • 6ZHANG L Z. Turbulent three-dimensional air flow and heat transfer in a eross-eorrugated triangular duct ['J]. Journal of Heat Transfer, 2005, 127(10) :1151 - 1158.
  • 7JAIN S, JOSHI A, BANSAL P K. A new approach to numerical simulation of small sized plate heat exchangers with chevron plates [J]. ASME Journal of Heat Trans-fer, 2007, 129(3) : 291 - 297.
  • 8WANG Q W, ZHANG D J, XIE G N. Experimental study and genetic-algorithm-based correlation on pres- sure drop and heat transfer performances of a cross-cor- rugated primary surface heat exchanger [J]. ASME Journal of Heat Transfer, 2009, 131(6) : 061802.
  • 9LOEHRKE R I. Evaluating the results of the single blow transient heat exchanger test[J]. Journal of Ex- perimental Thermal and Fluid Science, 1990, 3 (6): 574 - 580.
  • 10LIANG C Y, YANG W J. Modified single-blow tech- nique for performance evaluation on heat transfer sur- faces [J]. ASME Journal of Heat Transfer, 1975, 97(1) : 16- 21.

共引文献41

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部