石油与天然气化工2025，Vol.54Issue(3)：40-48,9.DOI:10.3969/j.issn.1007-3426.2025.03.006
天然气三甘醇脱水装置工艺及能耗优化
Process and energy consumption optimization of natural gas triethylene glycol dehydration unit
秦杨 1赵红亮 1杨政海 1李小璐 1谢诗意 2金心岫3
作者信息
- 1. 中国石油长庆油田分公司
- 2. 中国石油西南油气田公司
- 3. 中国石油西南油气田公司||新南威尔士大学
- 折叠
摘要
Abstract
Objective The aim is to solve the problems of high water dew point of dry purified gas and high energy consumption of triethylene glycol(TEG)dehydration unit in a natural gas purification plant.Method Field experiments and numerical simulation methods were used to deeply explore the optimization and technical improvement directions of TEG dehydration unit process parameters.Result Firstly,the influences of on-site filters,regeneration system and other equipment on the TEG solution were excluded.The water dew point of dry purified gas was mainly affected by three factors:the temperature of wet purified gas into the unit,the temperature of reboiler and the temperature of lean liquid into the absorber.The order of influence degree from large to small was:the temperature of wet purified gas into the unit＞the temperature of reboiler＞the temperature of lean liquid into the absorber.Secondly,the energy consumption of the TEG dehydration unit was positively correlated with the reboiler temperature,the temperature of the rich liquid into the regenerator and the TEG circulation volume.The energy consumption of the on-site TEG dehydration unit was mainly controlled by the reboiler temperature.Thirdly,on the premise of ensuring that the purified gas water dew point in winter and spring was not higher than-8℃and in summer and autumn not higher than 0℃,respectively,it was recommended to adopt the working mode of wet purified gas into the unit temperature of 22.52℃,reboiler temperature of 164℃and lean liquid into the absorber temperature of 49.24℃in summer and autumn,and the working mode of wet purified gas into the unit temperature of 15.00℃,reboiler temperature of 168.98℃and lean liquid into the absorber temperature of 41.57℃in winter and spring.Under this working mode,the energy consumption of the unit was reduced by 42.60%and 47.57%,respectively.Fourthly,Relying only on theoretical optimization of process parameters could not meet the needs of practical applications.It was recommended that the performance of cooling equipment for both wet purified gas and TEG should be improved.This would help reduce the high temperature effects of wet purified gas and TEG lean liquid,thereby minimizing the cost issues associated with excessive use of high-load reboilers.Conclusion By implementing the above measures,the water dew point of dry purified gas and the energy consumption of the unit can be reduced,which can provide a reference for the optimization of the TEG dehydration process.关键词
天然气/脱水/三甘醇/正交试验/响应面法/降低能耗Key words
natural gas/dehydration/triethylene glycol/orthogonal experiment/response surface method/reducing energy consumption引用本文复制引用
秦杨,赵红亮,杨政海,李小璐,谢诗意,金心岫..天然气三甘醇脱水装置工艺及能耗优化[J].石油与天然气化工,2025,54(3):40-48,9.
