Impact of Air Distribution Mode on Pipe Burst in 600 MW W-flame Boiler

CAO Xiaoling,LI Fan,LIU Yongwen,SU Ming2

Electric Power Construction ›› 2013, Vol. 34 ›› Issue (3) : 59-63.

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Electric Power Construction ›› 2013, Vol. 34 ›› Issue (3) : 59-63.

Impact of Air Distribution Mode on Pipe Burst in 600 MW W-flame Boiler

  • CAO Xiaoling1,LI Fan1,LIU Yongwen2,SU Ming2
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Abstract

In order to study the reason of frequent pipe burst of heating surface in a 600 MW supercritical W-flame boiler, the numerical simulation of combustion process in boiler is carried out to study the impact of air distribution modes on pipe burst of boiler heating surface. The results show that the temperature field at furnace center is in W shape distribution and symmetric under actual operation conditions. The change of temperature field is not sensitive in the furnace when the ratios of primary air and inside secondary air are 5/6 and 6/5 in front and back arch, and the temperature flame doesn't sweep over the heating surface; however, when the ratios of outside secondary air in front and rear arch and the graded wind in front and back wall are 5/6 and 6/5, the furnace temperature field appears skew, and the temperature flame badly sweeps over the cold ash hopper, which may cause pipe burst of heating surface at cold ash hopper.

Key words

W-flame boiler / air distribution mode / pipe burst / temperature field / numerical simulation

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CAO Xiaoling,LI Fan,LIU Yongwen,SU Ming2. Impact of Air Distribution Mode on Pipe Burst in 600 MW W-flame Boiler[J]. Electric Power Construction. 2013, 34(3): 59-63

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