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摘要
为解决沙漠气田原料气温度高(≥60℃)、处理规模大(1 200×104 m3/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。
Abstract
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 (1 200×104 m3 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
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节能
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工艺流程
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循环冷却
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分流
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二氧化碳分压
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高温
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天然气脱碳
Key words
amine method
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energy saving
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process flow
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recirculation cooling
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shunt
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carbon dioxide partial pressure
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high temperature
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natural gas decarbonization
Author summay
张天娇(1987-),女,硕士,工程师,研究方向为碳捕集及新能源新技术研发,通讯联系人,ztj201307@126.com。
分流吸收-级间循环冷却耦合脱碳工艺研究[J].
现代化工, 2024, 44(12): 215-219 DOI:10.16606/j.cnki.issn0253-4320.2024.12.039
