南八深冷装置分子筛脱水系统优化运行措施
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摘要
为解决南八深冷装置投产初期分子筛脱水系统存在的吸附器床层升/降压速度过快、设计再生温度不达标、吸附/再生周期不合理、控制程序不完善等问题,从理论分析和现场试验两个方面,对脱水系统运行方式及控制程序进行优化,最终将升/降压速度由0.73 MPa/min调整为0.25 MPa/min,热吹温度由180℃调整为210℃,吸附/再生周期由8 h调整为12 h,床层在进行升/降压过程中,程序强制执行,同时增加反馈确认功能,避免人为误操作。通过对脱水系统运行方式及控制程序优化,有效地解决了上述问题,确保了脱水系统的良好运行。
Since Nanba cryogenic plant starts up production at its early stages,several problems have been found about molecular sieve dehydration units,such as the pressure of molecular sieve beds increases or reduces too quickly; the designed regeneration temperatures are not up to standard; the adsorption/regeneration period is unreasonable; the control program is not perfect. Then through theoretical analysis and on-site test,we optimizes the dehydration system,thus the pressure increase/decrease rate is adjusted from 0. 73 MPa/min to 0. 25 MPa/min and the temperature of hot blowing is adjusted from 180℃ to210℃,and the adsorption/regeneration period is regulated from 8 hours to 12 hours as well. Meanwhile,during the pressure increasing/reducing of molecular sieve beds, the program will be enforced automatically with feedback confirmation to avoid misoperation. Finally,through these improvements,the above problems are effectively solved,ensuring the good running of the molecular sieve dehydration system.
Since Nanba cryogenic plant starts up production at its early stages,several problems have been found about molecular sieve dehydration units,such as the pressure of molecular sieve beds increases or reduces too quickly; the designed regeneration temperatures are not up to standard; the adsorption/regeneration period is unreasonable; the control program is not perfect. Then through theoretical analysis and on-site test,we optimizes the dehydration system,thus the pressure increase/decrease rate is adjusted from 0. 73 MPa/min to 0. 25 MPa/min and the temperature of hot blowing is adjusted from 180℃ to210℃,and the adsorption/regeneration period is regulated from 8 hours to 12 hours as well. Meanwhile,during the pressure increasing/reducing of molecular sieve beds, the program will be enforced automatically with feedback confirmation to avoid misoperation. Finally,through these improvements,the above problems are effectively solved,ensuring the good running of the molecular sieve dehydration system.
引文
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[13]张正玲.天然气处理厂分子筛脱水单元设计要点[J].油气田地面工程,2007,26(3):48-49.Zhang Zhengling.Key Points for Design of Molecular Sieve Dehydration Unit in Natural Gas Processing Plant[J].Oil-Gasfield Surface Engineering,2007,26(3):48-49.
[14]梁政,李双双,张立文,等.CNG脱水用4A分子筛再生性能实验研究[J].石油与天然气化工,2014,43(4):362-365.Liang Zheng,Li Shuangshuang,Zhang Liwen,et al.Experimental Study on Regeneration Performance of 4A Molecular Sieve for CNG Dehydration[J].Chemical Engineering of Oil&Gas,2014,43(4):362-365.
[15]刘刚,徐守君.天然气深冷处理装置分子筛脱水工艺分析与研究[J].石油石化绿色低碳,2016,23(3):48-52.Liu Gang,Xu Shoujun.Analysis and Research of Molecular Sieve Dehydration of Natural Gas Cryogenic Device[J].Green Petroleum&Petrochemicals,2016,23(3):48-52.
[16]陈长庆,杨凤娟.深冷装置干燥器系统存在的问题及调整措施[J].油气田地面工程,2011,30(5):75-78.Chen Changqing,Yang Fengjuan.Problems and Adjustment Measures of Existing Cryogenic Dryer System[J].OilGasfield Surface Engineering,2011,30(5):75-78.
[17]丁建成,王建.分子筛脱水工艺的参数优化[J].油气田地面工程,2014,33(10):28-29.Ding Jiancheng,Wang Jian.Parameter Optimization of Molecular Sieve Dehydration[J].Oil-Gasfield Surface Engineering,2014,33(10):28-29.
[18]诸林.天然气加工工程[M].北京:石油工业出版社,2008:166-188.Zhu Lin.Natural Gas Processing Engineering[M].Beijing:Petroleum Industry Press,2008:166-188.
[19]李明,魏志强.分子筛脱水装置节能探讨[J].石油与天然气化工,2012,41(2):156-160.Li Ming,Wei Zhiqiang.Energy Saving of Molecular Sieve Dehydration Unit[J].Chemical Engineering of Oil&Gas,2012,41(2):156-160.
[20]陈金星.合成氨5A分子筛的时序控制设计方法[J].中氮肥,2001,17(5):40-44.Chen Jinxing.Sequential Control Design Method of 5A Molecular Sieve for Ammonia Synthesis[J].M-sized Nitrogenous Fertilizer Progress,2001,17(5):40-44.
[2]王遇冬.天然气处理原理与工艺[M].2版.北京:中国石油出版社,2011:175-197.Wang Yudong.Natural Gas Processing Theory and Technology[M].2nded.Beijing:China Petroleum Press,2011:175-197.
[3]坎贝尔J M.天然气预处理和加工[M].2版.北京:石油工业出版社,1981:90-106.Cambel J M.Pretreatment and Processing of Natural Gas[M].2nded.Beijing:Petroleum Industry Press,1981:90-106.
[4]裘爱霞,张立胜,于艳秋,等.高含硫天然气脱硫脱碳工艺技术在普光气田的应用研究[J].石油与天然气化工,2012,41(1):17-23.Qiu Aixia,Zhang Lisheng,Yu Yanqiu,et al.Research on the Technology of High Sulfur Natural Gas Desulfurization and Decarbonization in Puguang Gas Field[J].Chemical Engineering of Oil&Gas,2012,41(1):17-23.
[5]袁东筱,钟小木,周明军,等.分子筛脱水装置脱水塔优化控制方法:中国,CN 105749697 A[P].2016-07-13.Yuan Dongxiao,Zhong Xiaomu,Zhou Mingjun,et al.Molecular Sieve Dehydration Device Optimization Control Method of Dehydration Tower:China CN 105749697 A[P].2016-07-13.
[6]胡晓敏,陆永康,曾亮泉.分子筛脱水工艺简述[J].天然气与石油,2008,24(1):39-41.Hu Xiaomin,Lu Yongkang,Zeng Liangquan.Brief Introduction of Molecular Sieve Dehydration Process[J].Natural Gas and Oil,2008,24(1):39-41.
[7]李明,卢任务,冼祥发,等.某脱水装置分子筛吸附塔设置数量的选择[J].天然气与石油,2006,24(6):46-49.Li Ming,Lu Renwu,Xian Xiangfa,et al.Selection of the Number of Molecular Sieve Adsorption Tower in the Dehydration Unit[J].Natural Gas and Oil,2006,24(6):46-49.
[8]赵建彬,艾国生,陈青海,等.英买力凝析气田分子筛脱水工艺的优化[J].天然气工业,2008,28(10):113-115.Zhao Jianbin,Ai Guosheng,Chen Qinghai,et al.Optimization of Dehydration Technology of Molecular Sieve in the Yengimahalla Condensate Gas Field[J].Natural Gas Industry,2008,28(10):113-115.
[9]陈召财.分子筛脱水工艺分析与比较[J].化学工程与装备,2012,42(2):121-122.Chen Zhaocai.Analysis and Comparison of Molecular Sieve Dehydration[J].Chemical Engineering&Equipment,2012,42(2):121-122.
[10]张伟娜.中小型LNG工厂分子筛脱水再生气系统工艺改进研究[D].成都:西南石油大学油气储运工程教研所,2012.Zhang Weina.Study on Process Improvement of Molecular Sieve Dehydration and Regeneration System in Small and Medium Sized LNG Plant[D].Chengdu:Institute of Oil and Gas Storage and Transportation Engineering,Southwest Petroleum University,2012.
[11]刘畅,李瑞萍.分子筛脱水装置的工艺设计及应用[J].石油和化工设备,2016,19(9):13-16.Liu Chang,Li Ruiping.Process Design and Application of Molecular Sieve Dehydration Unit[J].Petro&Chemical Equipment,2016,19(9):13-16.
[12]关盛军.解决分子筛粉化及变黑问题[J].油气田地面工程,2003,22(6):88-89.Guan Shengjun.To Solve the Problem of Molecular Sieve Pulverization and Blackening[J].Oil-Gasfield Surface Engineering,2003,22(6):88-89.
[13]张正玲.天然气处理厂分子筛脱水单元设计要点[J].油气田地面工程,2007,26(3):48-49.Zhang Zhengling.Key Points for Design of Molecular Sieve Dehydration Unit in Natural Gas Processing Plant[J].Oil-Gasfield Surface Engineering,2007,26(3):48-49.
[14]梁政,李双双,张立文,等.CNG脱水用4A分子筛再生性能实验研究[J].石油与天然气化工,2014,43(4):362-365.Liang Zheng,Li Shuangshuang,Zhang Liwen,et al.Experimental Study on Regeneration Performance of 4A Molecular Sieve for CNG Dehydration[J].Chemical Engineering of Oil&Gas,2014,43(4):362-365.
[15]刘刚,徐守君.天然气深冷处理装置分子筛脱水工艺分析与研究[J].石油石化绿色低碳,2016,23(3):48-52.Liu Gang,Xu Shoujun.Analysis and Research of Molecular Sieve Dehydration of Natural Gas Cryogenic Device[J].Green Petroleum&Petrochemicals,2016,23(3):48-52.
[16]陈长庆,杨凤娟.深冷装置干燥器系统存在的问题及调整措施[J].油气田地面工程,2011,30(5):75-78.Chen Changqing,Yang Fengjuan.Problems and Adjustment Measures of Existing Cryogenic Dryer System[J].OilGasfield Surface Engineering,2011,30(5):75-78.
[17]丁建成,王建.分子筛脱水工艺的参数优化[J].油气田地面工程,2014,33(10):28-29.Ding Jiancheng,Wang Jian.Parameter Optimization of Molecular Sieve Dehydration[J].Oil-Gasfield Surface Engineering,2014,33(10):28-29.
[18]诸林.天然气加工工程[M].北京:石油工业出版社,2008:166-188.Zhu Lin.Natural Gas Processing Engineering[M].Beijing:Petroleum Industry Press,2008:166-188.
[19]李明,魏志强.分子筛脱水装置节能探讨[J].石油与天然气化工,2012,41(2):156-160.Li Ming,Wei Zhiqiang.Energy Saving of Molecular Sieve Dehydration Unit[J].Chemical Engineering of Oil&Gas,2012,41(2):156-160.
[20]陈金星.合成氨5A分子筛的时序控制设计方法[J].中氮肥,2001,17(5):40-44.Chen Jinxing.Sequential Control Design Method of 5A Molecular Sieve for Ammonia Synthesis[J].M-sized Nitrogenous Fertilizer Progress,2001,17(5):40-44.