摘要
提出将超声速旋流分离技术应用到天然气脱二氧化碳领域,并通过对Laval喷管内气体流动规律的研究,初步验证其可行性。采用BWRS真实气体状态方程确定喷管喉部尺寸,采用双三次曲线法和圆弧加直线法设计喷管型面,利用FLUENT软件数值模拟所设计喷管内气体的流动过程,并分析入口温度、入口压力以及入口气体组成对二氧化碳液化特性的影响。研究表明:随着气体在Laval喷管中高速膨胀,气流温度、压力降低,在喷管出口可达到二氧化碳气体的液化条件;降低入口温度、提高入口压力或增加气体中二氧化碳的含量均有利于气体的液化。
The application of supersonic swirling technology in natural gas decarburization process was proposed and preliminarily verified by analyzing the flow process of gas stream within the Laval nozzle. The throat size was determined using BWRS equation of state and the nozzle profile was designed based on bi-cubic curve and arc plus straight line method. The flow process and the influence of inlet pressure, inlet temperature and inlet gas composition on the liquefaction process of carbon dioxide were simulated by FLUENT. Research results show that the gas temperature and pressure are reduced to meet the liquefaction condition of carbon dioxide due to the rapid expansion of gas in the Lava/nozzle. The reduction of inlet temperature, the rise of inlet pressure or the increase of carbon dioxide content in the inlet gas can promote the liquefaction of carbon dioxide.
出处
《天然气化工—C1化学与化工》
CSCD
北大核心
2017年第2期101-105,共5页
Natural Gas Chemical Industry
基金
国家自然科学基金资助项目(51274232)
中央高校基本科研业务费专项资金资助项目(16CX06004A)
关键词
天然气
脱碳
超声速
喷管
数值计算
natural gas
decarburization
supersonic
nozzle
numerical calculation
