天然气-煤共气化制备合成气热态模拟

Natural gas & coal co-gasification to produce synthesis gas in hot simulation

天然气-煤共气化制备通用合成气技术是基于天然气蒸汽转化法和煤气化过程开发的新工艺,通过技术原理分析,可以直接制备出H2/CO在1.0～2.0之间可调的粗合成气.应用移动床反应器进行热态模拟实验,主要研究了不同操作参数对火焰区温度及合成气有效成分(H2+CO)和H2/CO的影响.结果表明:天然气与氧气在同一位置喷入反应器,控制喷吹参数H2O/CH4/O2以及流量,在气化炉炉温不低于1000 ℃的条件下,煤或焦炭中挥发分基本裂解,可以直接制备出H2/CO在1.0～2.0之间,有效成分大于90.0%,残留的CH4小于2.0%的粗合成气.

A new process, natural gas ＆ coal co-gasification for synthesis gas production, was developed by combining natural gas steam reforming and coal gasification process. The H2/CO ratio of crude synthesis gas could be controlled in the range of 1.0-2.0. Using a moving bed as reactor, coke and coal as the raw materials in the preliminary study of hot simulative experiments, the effects of blowing parameters H2O/CH4/O2 on the temperature in the flame zone and the H2/CO ratio of synthesis gas were investigated. Natural gas and oxygen were blown into the reactor at the same position to keep the temperature of reactor above 1000 ℃ and the blowing parameters H2O/CH4/O2 were adjusted to produce crude synthesis gas, in which the H2/CO ratio varied to the range of 1.0-2.0, the contents of active compounds （H2 and CO） were more than 90.0% and the residue methane was less than 2.0%. The concept of natural gas ＆ coal co-gasification process is correct and feasible.