煤炭地下气化粗煤气相变模型及特性研究  

Model and characteristics of phase transformation of raw gas produced by Underground Coal Gasification

作　　者：邹红杰 黄港港 陈宇 王寿喜[2] 王亚彬[3] 王勇[2] Zou Hongjie;Huang Ganggang;Chen Yu;Wang Shouxi;Wang Yabin;Wang Yong(Beijing Design Branch of China Petroleum Engineering&Construction Corporation,Beijing 100085,China;Xi′an Shiyou University,Xi′an Shaanxi 710065,China;Beijing DWELL Petroleum Technical Development Company Limited,Beijing 100083,China)

机构地区：[1]中国石油工程建设有限公司北京设计分公司,北京100085 [2]西安石油大学,陕西西安710065 [3]北京迪威尔石油天然气技术开发有限公司,北京100083

出　　处：《煤化工》2023年第1期19-23,共5页Coal Chemical Industry

基　　金：中国石油天然气股份有限公司重大科技专项[2019E-25(JT)]。

摘　　要：采用煤炭地下气化技术可以实现煤炭资源清洁绿色开采和利用。为研究煤炭地下气化粗煤气的相变特性,以我国某地下气化先导试验粗煤气组分数据为例,运用Aspen Hysys软件平台建立了粗煤气全组分分析模型,并开展了相变模型和相变特性研究,对比分析了8组状态方程的适用性,并研究了随组分变化的粗煤气相变特性规律。结果表明,研究工况下,PR、PRSV、SRK状态方程适用性较强;井口压力(约3.3 MPa)下,温度高于300℃时,无液相析出;随温度降低,煤焦油、重烃等液相物质析出,且煤焦油优先析出;温度降至190℃以下时,大量液态H2O析出,形成复杂的多相混合物质。研究成果可为粗煤气井场高温集输管道设计提供理论依据。Underground Coal Gasification(UCG)technology was used to achieve the clean and green coal mining and utilization.To study the phase transformation characteristics of raw gas as a product of UCG technology,taking the raw gas component data from a UCG pilot test in China as an example,a full-component analysis model of raw gas was established by using Aspen Hysys software platform,and the phase transformation model and characteristics were studied.The applicability of eight groups of state equations was compared and analyzed.Moreover,the characteristic pattern of raw gas phase change with composition was studied.The results showed that the PR,PRSV and SRK state equations had strong applicability under the simulation conditions.At the wellhead pressure(about 3.3 MPa),when the temperature was higher than 300℃,no liquid phase was precipitated;with the decrease of temperature,liquid substances such as coal tar and heavy hydrocarbon precipitated,while the former precipitated first;when the temperature dropped to 190℃,a large amount of liquid H2O precipitated,forming complex multiphase mixtures.The research results could provide a theoretical basis for the design of collection and transmission pipeline system of raw gas well field at high temperature.

关 键 词：煤炭地下气化 粗煤气 相变模型 相变特性 模拟研究 Aspen Hysys 

分 类 号：TQ547[化学工程—煤化学工程]