分子筛脱水系统吸附周期动态调控方法研究与应用  

Research and application on dynamic regulation and control method of adsorption cy⁃cle in molecular sieve dehydration system

作　　者：年立志 NIAN Lizhi(Natural Gas Company of Daqing Oilfield Co.,Ltd.)

机构地区：[1]大庆油田有限责任公司天然气分公司,黑龙江省大庆市163416

出　　处：《石油石化节能与计量》2024年第11期18-22,共5页Energy Conservation and Measurement in Petroleum & Petrochemical Industry

摘　　要：大庆油田某天然气加工装置处理负荷逐渐降低,分子脱水筛系统按照初设工况的固定吸附周期模式运行,导致分子筛吸附容量过剩,再生过程热源再生气由底部通入逐步向上再生,再生初期对底层未经利用的分子筛加热再生时,存在不必要的热能损失。对此,结合分子筛吸附塔运行原理,分析分子筛转效时间与装置负荷、介质特性之间的关系,研究并开发分子筛脱水系统吸附周期动态调控方法,通过对5种不同脱水负荷工况下的现场试验,验证了该方法可始终保持分子筛利用率达到90%以上,并实现该天然气加工装置年节电36.55×10^(4)kWh,为同类分子筛脱水装置操控技术提供了借鉴。Due to the gradual decrease of the processing load of a natural gas processing unit in Daqing oilfield,the molecular sieve dehydration system has been carried out according to the fixed adsorption cycle mode of the original working condition,which will lead to the excess adsorption capacity of the molecular sieve.The heat source regeneration of the regeneration process is passed from the bottom gradually upward regeneration,and the molecular sieve to be used in the heating bottom of the initial regeneration period has been heated and regenerated,which exists the unnecessary heat loss.Thus,combined with the running principle of molecular sieve adsorption tower,the relationships between molecular sieve conversion time and device load and medium characteristics are analyzed.The dynamic regulation and control method of adsorption cycle in molecular sieve dehydration system is studied and developed.Through the field test under five different dehydration load conditions,it is verified that the method can keep the utilization rate of molecular sieve above 90%and realize the annual power saving of 36.55×10^(4) kWh in natural gas processing unit,which provides references for the manipulation technology of similar molecular sieve dehydration unit.

关 键 词：分子筛 吸附 脱水 机理 动态调控 

分 类 号：TE644[石油与天然气工程—油气加工工程]