分流吸收-级间循环冷却耦合脱碳工艺研究  

Study on coupled decarbonization process for split absorption-interstage recirculation cooling

作　　者：张天娇 刘欣 刘永铎 周军[2] 张青 ZHANG Tian-jiao;LIU Xin;LIU Yong-duo;ZHOU Jun;ZHANG Qing(North China Company,China Petroleum Engineering and Construction Corp.,Renqiu 062550,China;Southwest Petroleum University,Chengdu 610500,China;Hebei Drilling Equipment Manufacturing Branch Company,CNPC Baoji Oilfield Machinery Co.,Ltd.,Renqiu 062550,China)

机构地区：[1]中国石油工程建设有限公司华北分公司,河北任丘062550 [2]西南石油大学,四川成都610500 [3]中国石油集团宝鸡石油机械有限责任公司河北钻采装备制造分公司,河北任丘062550

出　　处：《现代化工》2024年第12期215-219,共5页Modern Chemical Industry

基　　金：国家自然科学基金项目(51704253)。

摘　　要：为解决沙漠气田原料气温度高(≥60℃)、处理规模大(1200×10^(4)m^(3)/d)且二氧化碳分压低(≤0.5 MPa)而引起的胺液脱碳效果差及装置能耗过高的问题,提出了一种“分流吸收-级间循环冷却”的耦合工艺,利用HYSYS建模并优选出最佳分流比为25%,最佳回流位置为第12层塔板;在此基础上,与常规的一段吸收+(闪蒸+汽提)再生工艺进行对比分析,研究结果表明,在相同工况条件下,分流吸收-级间循环冷却工艺的甲烷损失、轻烃损失较低,获得的净化气流量更高,且更加节能。In order to solve the problems that amine decarbonization method has a poor effect and the plant consumes high energy because of high temperature(≥60℃),high flow rate(1200×10^(4)m^(3)per day)and low partial pressure of carbon dioxide(≤0.5 MPa)of the raw gas in the desert gas field,a“split absorption-interstage recirculation cooling”coupling process is proposed.Aspen HYSYS software is employed to establish model and optimize the process,and the optimal parameters are obtained as follows:the optimal split ratio is 25%,and the optimal reflux position of the cooling strand is at the 12th stage plate.On this basis,taking the conventional one-stage absorption+(flash+stripping)regeneration process as a reference under the same working conditions,the improved process loses less methane and less light hydrocarbon,gains higher purified gas flow rate and save more energy.

关 键 词：胺法 天然气脱碳 高温 二氧化碳分压 分流 循环冷却 工艺流程 节能 

分 类 号：TE624[石油与天然气工程—油气加工工程]