NOX reduction by multi stage air injection on pulverized coal combustion.
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概要
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In order to reduce NO<SUB>x</SUB> and the ignition loss generated by the pulverized coal combustion, the optimum two stage combustion method and the multistage air injection method is investigated at the pulverized coal combustion test facility (standard load: 6.54 × 10<SUP>5</SUP> kcal/hr).<BR>The location of the air injection for the two stage combustion is suitable at the case of distance position from the burner for the NO<SUB>x</SUB> reduction, but suitable at the case of near the burner for the ignition loss reduction. So, the location of the air injection has the optimum point. However the optimum air injection point is used, if the air rate for two stage combustion is very high, the regeneration of NO<SUB>x</SUB> by the recombustion at the two stage air injection point is occured. The air rate for the two stage combustion has the upper limit.<BR>The multi-stage air injection method devide the air injection point for the two stage combustion to control the re-combustion at the case of the high air rate for the two stage combustion, and the regeneration of NO<SUB>x</SUB>. So, the NO<SUB>x</SUB> reduction rate of the multi-stage air injection method is larger than that of the two stage combustion . The air injection point and the distribution of the air injection rate for the multi-stage air injection method have the optimum values similar with the two stage combustion for both of the simultaneous reduction of NO<SUB>x</SUB> and ignition loss.<BR>If the injection point and the distribution of the injection air rate are optimized NO<SUB>x</SUB> and the ignition loss emission are lowered than that of the two stage combustion.
- 一般社団法人 日本エネルギー学会の論文
一般社団法人 日本エネルギー学会 | 論文
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