碳酸丙烯酯脱除沼气中CO_2工艺分析
|
摘要
沼气是清洁的可再生能源,但含碳量较高,不满足管输要求。通过HYSYS软件应用SRK方程对碳酸丙烯酯脱碳流程进行模拟分析,考察吸收气液比、吸收压力、气提气液比、碳酸丙烯酯贫液进料温度、预处理沼气的进料温度、吸收塔板数对脱碳效果的影响:净化气中CO2的含量随着吸收气液比的增大逐渐增大,脱碳率随之减小,但吸收气液比在10~30时,净化气中的CO2含量变化不大;随着吸收塔板数的增加,净化气中的CO2摩尔含量逐渐减小,脱碳率逐渐上升,当塔板数小于10时,脱碳效果明显,当塔板数超过10时,对脱碳效果影响较小。
Biogas is clean and renewable,but with a higher content of carbon dioxide,does not meet pipeline transportation requirements.By using SRK equation of HYSYS software,this paper simulates the process of removing carbon dioxide by propylene carbon-ate.Carbon dioxide content of clean biogas and carbon dioxide removal rate are main indexes.This paper analyses the influence of absorption gas liquid ratio,absorption pressure,temperature of lean propylene carbonate lean solution,temperature of pretreating biogas,air striping gas liquid ratio and stage number of absorber on the effect of removing carbon dioxide.Along with gas liquid ration increasing,the mole fraction of carbon dioxide in the purified biogas increases and carbon dioxide removal rate reduces.Gas liquid ration in the range between 10and30 has little effect on removing carbon dioxide.Along with stage number increasing,the mole fraction of carbon dioxide in the purified biogas reduces,and carbon dioxide removal rate increases.When stage number is less than 10,the variation ofstage number has obvious effects on removing carbon.
Biogas is clean and renewable,but with a higher content of carbon dioxide,does not meet pipeline transportation requirements.By using SRK equation of HYSYS software,this paper simulates the process of removing carbon dioxide by propylene carbon-ate.Carbon dioxide content of clean biogas and carbon dioxide removal rate are main indexes.This paper analyses the influence of absorption gas liquid ratio,absorption pressure,temperature of lean propylene carbonate lean solution,temperature of pretreating biogas,air striping gas liquid ratio and stage number of absorber on the effect of removing carbon dioxide.Along with gas liquid ration increasing,the mole fraction of carbon dioxide in the purified biogas increases and carbon dioxide removal rate reduces.Gas liquid ration in the range between 10and30 has little effect on removing carbon dioxide.Along with stage number increasing,the mole fraction of carbon dioxide in the purified biogas reduces,and carbon dioxide removal rate increases.When stage number is less than 10,the variation ofstage number has obvious effects on removing carbon.
引文
[1]中国可再生能源发展战略研究项目组.中国可再生能源发展战略研究丛书:生物质能源卷[M].北京:中国电力出版社,2008.
[2]Isci A,Demirer G N.Biogas Production Potential From Cotton Wastes[J].Renewable Energy,2007,(32):750-757.
[3]邓启明.基于循环经济的农村能源与生物质能开发战略研究[J].农业工程学报,2006,22(增刊1):12-15.
[4]董天峰,李君兴,张蕾蕾,等.生物质能技术现状与发展[J].农业与技术,2008,28(2):9-11.
[5]Alberto V,Gisela V,Nelson A,et al.Evaluation of Marine Algae as a Source of Biogas in a Two-stage Anaerobic Reactor System[J].Biomass and Bio Energy,2008,(32):338-344.
[6]Stephanie Lansing,Raul Botero,Jay F Martin.Waste Treatment and Biogas Quality in Small-scale Agricultural Digesters[J].Bioresource Technology,2008,155(99):5881-5890.
[7]万宇飞,邓骁伟,程涛,等.不同含碳量天然气脱碳方案选择[J].油气田环境保护,2013,23(3):56-58.
[8]聂红,江皓,种道文,等.填料塔中碳酸丙烯酯脱除沼气中的CO2[J].可再生能源,2013,31(3):86-90.
[9]万宇飞,邓道明,刘人玮,等.利用系统压差膨胀液化天然气流程模拟[J].天然气与石油,2013,31(4):33-36.
[10]范庆虎,李红艳,尹全森,等.低浓度煤层气液化技术及其应用[J].天然气工业,2008,28(3):117-120.
[11]杨贵荣,高燕如,黄洁.碳丙脱碳吸收—再生系统的模拟计算[J].化肥设计,2008,46(2):31-33.
[2]Isci A,Demirer G N.Biogas Production Potential From Cotton Wastes[J].Renewable Energy,2007,(32):750-757.
[3]邓启明.基于循环经济的农村能源与生物质能开发战略研究[J].农业工程学报,2006,22(增刊1):12-15.
[4]董天峰,李君兴,张蕾蕾,等.生物质能技术现状与发展[J].农业与技术,2008,28(2):9-11.
[5]Alberto V,Gisela V,Nelson A,et al.Evaluation of Marine Algae as a Source of Biogas in a Two-stage Anaerobic Reactor System[J].Biomass and Bio Energy,2008,(32):338-344.
[6]Stephanie Lansing,Raul Botero,Jay F Martin.Waste Treatment and Biogas Quality in Small-scale Agricultural Digesters[J].Bioresource Technology,2008,155(99):5881-5890.
[7]万宇飞,邓骁伟,程涛,等.不同含碳量天然气脱碳方案选择[J].油气田环境保护,2013,23(3):56-58.
[8]聂红,江皓,种道文,等.填料塔中碳酸丙烯酯脱除沼气中的CO2[J].可再生能源,2013,31(3):86-90.
[9]万宇飞,邓道明,刘人玮,等.利用系统压差膨胀液化天然气流程模拟[J].天然气与石油,2013,31(4):33-36.
[10]范庆虎,李红艳,尹全森,等.低浓度煤层气液化技术及其应用[J].天然气工业,2008,28(3):117-120.
[11]杨贵荣,高燕如,黄洁.碳丙脱碳吸收—再生系统的模拟计算[J].化肥设计,2008,46(2):31-33.