CAJ | 학술논문

高效能两段组合式煤气化工艺能有效利用高温煤气显热,以提高现有气流床气化技术的冷煤气效率。在两段组合式煤气化炉热态实验装置上,考察了二段床层不同粒径范围煤焦的气化反应性,实验得出,最优粒径范围为10~15mm。该粒径范围下,二氧化碳累积转化率达10%,其反应速率在反应30 min时达到峰值,床层平均温降最高,达到402.4℃。文中还研究了钾盐添加量对二段煤焦气化反应性能的影响,钾的添加量应大于5%才能明显体现其良好催化效果。碳酸钾用量在8%下的催化效果显著,二段出口有效气体浓度和碳转化率等参数提高明显,二氧化碳累积转化率为19%。此工艺有效实现CO2减排和资源化利用,环境效益良好。
고효능량단조합식매기화공예능유효이용고온매기현열,이제고현유기류상기화기술적랭매기효솔。재량단조합식매기화로열태실험장치상,고찰료이단상층불동립경범위매초적기화반응성,실험득출,최우립경범위위10~15mm。해립경범위하,이양화탄루적전화솔체10%,기반응속솔재반응30 min시체도봉치,상층평균온강최고,체도402.4℃。문중환연구료갑염첨가량대이단매초기화반응성능적영향,갑적첨가량응대우5%재능명현체현기량호최화효과。탄산갑용량재8%하적최화효과현저,이단출구유효기체농도화탄전화솔등삼수제고명현,이양화탄루적전화솔위19%。차공예유효실현CO2감배화자원화이용,배경효익량호。
Sensible heat of high temperature syngas could be used effectively by high-efficiency two stage combined coal gasification technology,so as to enhance the cold gas efficiency in the current entrained-flow gasifier.Gasification reactivity of coke was investigated under different ranges of size distributions in the secondary bed.The experiment results show that the optimal size range is 10~15 mm size.Under this size distribution,carbon dioxide cumulative conversion is 10%.reaction rate reaches the peak value after 30 min’ reaction,and the average temperature drop of the secondary bed was the most obvious reaching 402.4 degrees centigrade.The effects of potassium carbonate loadings on coke gasification reactivity were investigated as well.It shows that the catalytic effects could be obvious when the loading was above 5%.The concentration of H2and CO,carbon conversion and the heating capacity of the second stage’s outlet syngas are enhanced dramatically in the condition of the additive 8%K.Carbon dioxide cumulative conversion reached 19%,so it could make great contribution to our environment with this technology for CO2emissions reduction and utilization.