【摘要】 为开发CO₂旋转弧等离子体煤气化来制取合成气技术,实验考察了国内四种煤粉的煤粉挥发分含量、CO₂气量以及不同进料比下对于气化过程的影响。实验结果表明,气化结果与煤粉的挥发分含量有着明显的正相关关系,挥发分含量越高,越有利于煤粉气化,产品气中CO与H₂的体积含量可超过93.5%。随着CO₂气量的增加,CO含量增大,而H₂含量则随之减少,碳转化率最高可以达到86.1%。在不同的CO₂与煤粉进料比情况下,H₂含量随着反应器输入功率的增大会出现峰值。当进料比为18.7时,能量转化效率可以达到最高的71.6%。与普通煤气化过程相比,等离子体煤气化过程具有更高合成气含量以及碳转化率,是一种具有工业应用前景的煤炭清洁高效利用手段。更多还原

【Abstract】 To develop the syngas preparation technology from the CO₂ rotary arc plasma gasification, four domestic pulverized coals volatile content, CO₂ gas and different feed ratio for the gasification process were investigated. The results showed that the gasification performance had significantly positive correlation with the volatiles content of the pulverized coal. The higher the volatile content was, the more favorable for the gasification of the pulverized coal. The content of CO and H₂ in the product gas can exceed 93.5%. With the increase of CO₂ content, the content of CO increased, while the H₂ content decreased, and the carbon conversion rate can reach up to 86.1%. In the case of different CO₂ and pulverized coal feed ratio, the H₂ content increased to peak value with the increase of the input power of the reactor. At the feed ratio of 18.7, energy conversion efficiency reached the maximum of 71.6%. Compared with conventional coal gasification process, plasma gasification process has a higher syngas volume fraction and carbon conversion rate, which has large industrial application prospect in clean and efficient coal utilization.更多还原