Experimental study on flue gas denitrification mechanism with compound reducing agent composed of ammonia and reductive gases
ZHANG Zhongxiao
DONG Jiancong
YU Juan
YANG Mei
LI Delong
Abstract：In order to improve the efficiency of selective non-catalytic reduction( SNCR)technology and meet the requirements of the newest environmental protection standard,a compound reducing agent composed of ammonia and reductive gases was injected into flue gas. The ex-perimental process was simulated by SNCR elementary reaction dynamical model which introduced the compound reducing agent. The reaction characteristics were compared by analyzing the experimental results and simulated results. The results showed that,the compound reducing a-gents were able to decrease the required temperature and extend the width of the temperature window significantly. The mixture of ammonia with H2 lowered the optimal reaction temperature from 920 ℃ to 750 ℃,the denitrification effects of the mixture of ammonia with CH4 was similar to that of the mixture of ammonia with CO,both mixture were able to lower the optimum reaction temperature from 920℃ to 840℃. While the temperature window for NOx removal with Ammonia-CH4 as the compound reducing agent was wider than that of CO. Moreover,the denitrification efficiency of ammonia with CH4 was higher than that of ammonia with CO nearly by 9%. The highest denitrification efficiency of compound reducing agent was able to reach around 67%,which met the requirements of the latest NOx emission standards.
Keywords：NOxflue gas denitrificationcompound reducing agentdenitrification efficiency
Publication Date：2015-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 1-5,19 )