煤制天然气气化单元的数值模拟  

Simulation of Gasifying Unit in the Experiment System for Producing Natural Gas Using Coal

作　　者：李刚[1] 王翠苹[1] 李厚洋[1] 姜旭[1] 

机构地区：[1]青岛大学机电工程学院,山东青岛266071

出　　处：《青岛大学学报（工程技术版）》2014年第4期106-110,共5页Journal of Qingdao University(Engineering & Technology Edition)

基　　金：山东省自然科学基金项目资助(ZR2010EM004)

摘　　要：为生产煤制天然气,本文采用HSC化学热力学计算软件进行了煤气化单元的数值模拟.通过改变反应温度、压力及气化剂水蒸气的供入量,分析煤气化产物可用于甲烷化的有效组分（CO,H2,CO2,CH4）摩尔分数的变化规律,同时结合相应的能源转化效率优化工况参数,降低甲烷化的氢气补充并提高转化效率.结果表明,煤制天然气煤气化单元中的运行参数最优选择为1.5 MPa,900℃;煤及气化剂输入量为n（煤）∶n（水）=1∶2;煤气化产物中有效气摩尔分数达96.97％,n（CO）∶n（H2）生成速率为1.5～1.8.该结果可以用于指导煤制天然气的实验研究.For the production of coal gas,this paper used the HSC chemical thermodynamics calculation software for the numerical simulation of 10 kg/h coal gasification unit.By changing the reaction temperature,pressure and steam gasification agent,proportion of supply analysis of coal gasification products can be used in the methanation of effective component （CO,H2,CO2,CH4） containing rate change rule,at the same time,combined with the corresponding energy conversion efficiency,optimization of operating conditions,reduced the methanation supplement and improved the efficiency of conversion of hydrogen.The results showed that the optimal choice of coal gasification unit operation parameters was 1.5 MPa,900 ℃; Coal gasification agent and input quantity ratio was 1 ∶ 2; Coal gasification in the product was 96.97％,and the effective gas holdup CO,H2 was 1.75.The results could be used to guide the experimental research of coal gas.

关 键 词：煤气化 两步法 灰影响 气体产物 

分 类 号：TQ546[化学工程—煤化学工程]