CAJ | 학술논문

炉膛冷灰斗区域可能形成局部高浓度的CO/H2混合气，高温焦块落入就可能引起爆燃．通过试验研究了冷灰斗区域N2、CO2氛围对CO、H2爆燃下限以及CO-H2混合气爆燃超压和压力波传播速度的影响．结果表明，随着混合气中CO2浓度从0增加到18%，CO爆燃下限几乎呈线性关系从18.3%上升到31.0%，H2的爆燃下限以相同的规律从11.0%上升到16.3%，在该 CO2浓度范围内，CO-H2混合气的爆燃峰值从111.8,kPa 下降到60.4,kPa，压力波传播速度明显降低，但仍高于420,m/s；混合气中 CO/H2比越高，混合气爆燃强度越弱．相同环境下，CO2对 CO-H2混合气爆燃特性的影响强于N2．
로당랭회두구역가능형성국부고농도적CO/H2혼합기，고온초괴락입취가능인기폭연．통과시험연구료랭회두구역N2、CO2분위대CO、H2폭연하한이급CO-H2혼합기폭연초압화압력파전파속도적영향．결과표명，수착혼합기중CO2농도종0증가도18%，CO폭연하한궤호정선성관계종18.3%상승도31.0%，H2적폭연하한이상동적규률종11.0%상승도16.3%，재해 CO2농도범위내，CO-H2혼합기적폭연봉치종111.8,kPa 하강도60.4,kPa，압력파전파속도명현강저，단잉고우420,m/s；혼합기중 CO/H2비월고，혼합기폭연강도월약．상동배경하，CO2대 CO-H2혼합기폭연특성적영향강우N2．
High-concentration CO/H2 mixture may be formed in the cold hopper area of local boiler. Deflagration would be caused if there are some high temperature cokes droping into the dangerous area. The influence of N2,CO2 concentration on lower deflagration limit(LDL)of CO and H2,deflagration overpressure of CO/H2mixture and its propagation velocity were studied. The results indicate that with the added volume concentration of CO2risingfrom 0 to 18%,the LDL of CO rises from 18.3% to 31.0% nearly linearly,and the LDL of H2 rises from 11.0% to 16.3%with the same regularity. The overpressure of CO/H2 deflagration peak decreases from 111.8,kPa to 60.4,kPa within the same CO2 concentration range. The propagation velocity decreases sharply,but it is always higher than 420,m/s. The higher the molar ratio of CO/H2 is,the weaker the deflagration overpressure is. The inhibiting effect of CO2is more powerful than that of N2 under the same condition.