【作者】 崔勇；

【导师】 梁杰；

【作者基本信息】 中国矿业大学（北京） ， 洁净能源技术与工程， 2014， 博士

【摘要】 本论文将逆向燃烧气化方法应用到煤炭地下气化技术中，以期解决正向气化中后期高强度气化过程难以继续进行问题。通过研究逆向燃烧气化过程中气相流动状态、火焰的移动规律及其主要影响因素，提出了煤层正逆向联合燃烧气化工艺。利用该工艺获得与正向气化同样热值和品质的煤气，提高能源综合利用效率。基于逆向燃烧气化的过程特点，本论文利用高温气化反应炉研究了渗流通道逆向燃烧气化的特性；通过模型试验及数值模拟研究了富氧—水蒸气气化工艺煤层正逆向燃烧气化过程，并验证了此技术的可行性。研究结果表明：煤层逆向燃烧气化火焰工作面移动速度与氧气流量成正比。火焰移动速度与氧气流量的关系式可用一级阿累尼乌斯动力学方程来表达，通过调节汽氧比可以控制反应炉的气化温度，褐煤和烟煤适合的汽氧比分别为1.5：1-2：1和1.3：1-1.75：1，通过正逆向联合燃烧气化工艺延长气化时间25%，煤气中有效组分（CO+H2）含量超过60-70%，符合做合成气的要求。更多还原

【Abstract】 The reverse combustion gasification method is applied to the underground coal gasificationprocess in order to solve the problem occurred in the late stage of forward gasification which thehigh intensity gasification process is difficult to be continued. The technology of reversecombustion gasification technique combined with forward combustion gasification is creativelyput forward through the study of reverse combustion phenomenon, gasification flame movementand its main influence factors. At the same time the coal gas of heat value and quality same asforward gasification can be obtained to improve the energy efficiency using reverse combustiongasification technique. The properties of reverse combustion in the seepage channel are studiedwith high temperature coal gasification reaction furnace based on the characteristics of reversecombustion gasification process in the thesis. The forward and reverse combustion gasificationtechnology of gasifying coal with oxygen-steam gasification agent is investigated through themodel tests and numerical simulation. The feasibility of technology was tested. The results showthat the relationship between the inject gas flow within certain limits and velocity of thegasification flame was linear during reverse combustion. And equation of flame speed andoxygen flow can be expressed first-order Arrhenius kinetics. The gasification temperature of thereaction furnace can control by adjusting the ratio of steam to oxygen. The optimal ranges ofgasifying lignite and bituminous coal were found to be1.5–2.0and1.3–1.75, respectively. Thegasification time was extended more than25%and using the reverse combustion approach. Theaverage effective content (H2and CO) of syngas was in the range of60–70%, meetingthe requirement of synthesis gas.更多还原