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Upgrading the strengthened low-NOx and high-burnout combustion performance by staging the hopper air in a down-fired furnace by Min Kuang; Xiaojuan Zhao; Jialin Wang; Haiqian Wu; Xiu Wang is a Engineering article available to read on EtoBox.

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With respect to the unexpected hopper-air function of strengthening the deep-air-staging conditions in a 600 MW e down-fired furnace equipped with a cascade-arch low-NO x and high-burnout configuration (CLHC), the infurnace flow field, coal combustion, and NO x formation are numerically evaluated at four hopper-air layout setups of the elevated hopper-air scheme (EHS), conventional hopper-air scheme (CHS), descended hopper-air scheme (DHS), and staged hopper-air scheme (SHS). The aim is to determine the hopper-air layout impact and establish an available hopper-air layout setup for upgrading the strengthened low-NO x and high-burnout combustion performance. At EHS, the combustion symmetry seems to be a little imperfect, with the shallow flame penetration and involuntarily strengthened combustion in the upper furnace incurring high NO x emissions and burnout loss. DHS forms asymmetric combustion with a poor combustion status appearing in the furnace's front-half side, corresponding to high levels of residual O 2 , poor burnout, and low NO x emissions at the furnace outlet. Both CHS and SHS achieve symmetrical combustion to improve the furnace performance. In comparison to CHS, SHS p

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Author

Min Kuang; Xiaojuan Zhao; Jialin Wang; Haiqian Wu; Xiu Wang

Publisher

Elsevier BV

Published

2021

Language

EN

Field

Engineering (Physical Sciences)