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采用GRI 3.0数据库和Gear算法再现炉内再燃脱硝再燃区中化学反应和自由基的变化规律,然后采用敏感性分析的方法揭示再燃区中对NO脱除起直接作用的反应与化学机理。研究表明在再燃脱硝再燃区中直接起到脱硝作用的主要基元物质为:NH、CH_3、CH_2、CH、HCCO、NCO、C、CH_2(S)。HCN和HNCO虽然没有直接和NO反应,但在脱硝中发生重要作用,主要通过形成一些中间自由基发生作用。该研究为再燃脱硝的技术的应用提供理论基础。
The GRI 3.0 database and Gear algorithm were used to reproduce the chemical reactions and free radicals in the reburning zone after reburning in the furnace. The sensitometric analysis was used to reveal the reaction and chemical mechanism of NO removal in the reburning zone. The results show that the main elements of denitrification in the reburning denitrification zone are NH, CH_3, CH_2, CH, HCCO, NCO, C and CH_2 (S). Although HCN and HNCO do not directly react with NO, they play an important role in denitrification and mainly act on the formation of some intermediate free radicals. The research provides a theoretical basis for the application of reburning denitration technology.