【摘要】 为了证实水煤浆与主要由甲烷构成的伴生气共气化反应过程的有效性,科学分析其基本操作特性并预测产物分布,在不涉及反应动力学和反应器设计的情况下,通过化学计量法对该过程进行了基本考察。将反应体系中涉及到的总反应简化为8个非负基本反应的非负线性组合,划出无过剩组分的反应物和产物分布区;根据反应吸热量与放热量相等的原则绘制出不同甲烷进料分率下的热平衡线,进一步将该反应物和产物分布区缩小到热平衡区内。通过对热平衡区的分析表明:水煤浆气化所产生的合成气氢碳比大于0.295,H₂的摩尔分数在29.1%～43.9%;甲烷蒸汽重整产生的合成气氢碳比大于3.0,H2的摩尔分数在75.0%～80.0%;甲烷非催化部分氧化产生的合成气产物氢碳比接近1.82,H2的摩尔分数接近63.1%;通过控制相关工艺参数,可实现合成气的氢碳比在1～2之间连续可调,以满足下游加工需要。水煤浆和甲烷共气化能实现甲烷和煤之间的碳氢互补,降低产物中CO₂含量,提高原料水利用率,同时可有效实现过程的能量互补。更多还原

【Abstract】 In order to confirm the effectiveness of the co-gasification process of coal-water slurry and associated gas（mainly methane）, a stoichiometry method was applied without reaction kinetics and reactor design to analyze basic operating characteristics and predict product distribution. All reactions involved in the system were reduced to a non-negative linear combination of 8 non-negative basic reactions, and the reactants and product distribution regions without excess components were obtained. The heat balance line at different methane feed rates was plotted, and the distribution areas of the reactants and products were further reduced to heat balance zone based on the equal principle of heat absorption and release. The heat balance results show that the hydrogen to carbon ratio in syngas produced by coal-water slurry gasification is greater than 0.295, and H2 molar fraction is between 29.1% and 43.9%. The hydrogen to carbon ratio in syngas produced by associated gas is greater than 3.0 and the H2 molar fraction is 75.0%～80.0%. The hydrogen to carbon ratio produced by non-catalytic partial oxidation of methane is close to 1.82, and the H2 molar fraction is close to 63.1%. H₂ to CO ratio of syngas can be adjusted to 1～2 by controlling relevant process parameters, and the downstream processing can be satisfied. The co-gasification of coal-water slurry and associated gas can realize the complementarity of hydrocarbons between methane and coal, reduce CO₂ content in products, increase raw water utilization and effectively realize energy complementary.更多还原