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南京师范大学学报（工程技术版）[ISSN:1006-6977/CN:61-1281/TN]

Issue:

2013年04期

Page:

29-

Research Field:

Publishing date:

Info

Title:

Influence of Operation Parameters on NO Reduction Through Biomass Reburning

Author(s):

Hao Jiangtao; Yu Wei; Lu Ping; Zhu Xiuming

School of Energy and Mechanical Engineering,Nanjing Normal University,Nanjing 210042,China

Keywords:

biomass reburning; NO_x removal; water vapor; additives

PACS:

TK229.6; X701

DOI:

-

Abstract:

NO reduction through reburning with biomass named rice husk(RH),saw dust(SD),biomass char(BC)are carried out in an entrained flow reactor(EFR).The effects of reaction temperature in the reburning-zone(T₂),stoichiometric ratio in the reburning-zone(SR₂),residence time(τ),the initial NO concentration(C_NO,in),water vapor content,biomass species and additives,et al.are analyzed.The results indicate that:NO removal efficiency of biomass reburning increases with the increase of the reaction temperature in the reburning-zone at T₂=850 ℃～1 150 ℃.NO removal efficiency increases with the decrease of SR₂ at SR₂=0.5～1.0.NO removal efficiency shows a tendency of increasing at first,and becoming stable gradually with increasing residence time while τ=0.5～1.3 s.NO removal efficiency increases with the increase of the initial NO concentration in the range of 300～600 μL/L.NO removal efficiency shows a tendency of increasing at first,decreasing later and becoming stable with increasing water vapor content,and the best NO removal efficiency is obtained at 4% water vapor content in the simulated flue gas.Different biomasses have different performances on NO reduction.The NO removal efficiency of RH and SD is more than BC.Additives have certain promoting effects on NO reduction and the improvement of NaCl on NO reduction is more effective than other additives.The concentration of additives(Fe₂O₃)has no significant effect on NO reduction in the range of 50～150 μmol/mol.

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Last Update: 2013-12-30