100万方天天然气三甘醇脱水装置工艺设计

毕业设计（论文）题目100万方/天天然气三甘醇脱水装置工艺设计学生姓名学号教学院系应用技术学院专业年级石油化工生产技术2008指导教师单位西南石油大学辅导教师单位完成日期2011年06月05日摘要天然气是一种烃类混合气体，主要由低分子饱和烃为主的烃类气体与少量非烃类气体组成。作为井流物的天然气总是被水所饱和的，为了达到商品天然气的管输水露点要求，必须将天然气中的水分脱除到一定的程度。天然气脱水属于天然气处理内容之一，常用的脱水方法有低温分离脱水、溶剂吸收法脱水和固体吸附法脱水等，其中溶剂吸收法脱水中的三甘醇脱水工艺应用最为普遍。。文章根据天然气站场的原料气条件和脱水要求，综合考虑工艺要求和经济影响，采用三甘醇溶剂吸收法脱水和汽提法再生工艺，借助于流程模拟软件HYSYS进行模拟计算，通过对三甘醇脱水工艺参数的选择和相关设备尺寸的估算，对整个工艺中的吸收塔进行了物料衡算，对塔高、塔径进行了确定，对塔板各项参数的计算及相关设备的选型，设计出了符合原料气脱水要求及天然气脱水工艺规范的脱水工艺流程及装置。并通过对工艺方法和工艺参数的详细分析，验证了文章中天然气站场脱水工艺设计的合理性。关键词：天然气三甘醇脱水再生汽提流程模拟AbstractNaturalgasisakindofhydrocarbongasmixture,mainlybythelowmolecularsaturatedhydrocarbonswithsmallamountsofhydrocarbongasesmainlycomposedthehydrocarbongases.Aswellflowcontentofnaturalgasisalwayswater,inordertoachievesaturationofcommercialnaturalpipe-conveyingwaterdemand,mustwilldewpointthemoistureremovalofnaturalgastoacertainextent.Naturalgasdehydrationbelongtooneofthenaturalgasprocessingcontent,thecommonlyuseddehydrationmethodhaslowtemperatureseparationdehydration,solventabsorptiondehydrationandsolidadsorptiondehydrationetc,whicharethreeofsolventabsorptiondehydrationdehydratetechniqueglycolarewidelyused.Accordingtothegasstationmaterialsgasconditionsanddehydrationrequirements,comprehensiveconsiderationoftheprocessrequirementandeconomicimpact,adoptthreedegsolventabsorptiondehydrationandsteamlatifahregenerationprocess,HYSYSbyprocesssimulationsoftwaretosimulatecalculation,throughthreedegdehydrationprocessparameterselectionandrelatedequipmentsizeforthewholeprocess,estimatedtheabsorptiontower,thematerialbalanceoftowerishigh,towerdiametertodeterminetheparameters,calculationoftowerboardandrelatedequipmentselection,designthefeedgasdehydrationconformwiththerequirementsandgasdehydrationprocessspecificationdehydrationprocessandequipment.Andthroughtheprocessandtheprocessparametersofadetailedanalysis,andverifiesthearticlesinthegasstationandtherationalityofthedesignofdewateringprocess.Keyword:NaturalgasthreedegdehydrationregenerationsteamstrippingProcesssimulationI目录1绪论...........................................................................................................................11.1天然气概述......................................................................................................11.2天然气的组成与分类.....................................................................................11.2.1天然气的组成.......................................................................................21.3天然气的主要用途.........................................................................................21.4天然气净化的目的意义..................................................................................21.5天然气脱水......................................................................................................41.5.1天然气含水量.......................................................................................41.6天然气水合物..................................................................................................71.6.1天然气水合物的结构...........................................................................71.6.2水合物的生成条件...............................................................................71.6.3天然气水合物的防止措施...................................................................72天然气脱水的工艺...................................................................................................92.1天然气脱水方法..............................................................................................92.2.脱水工艺流程设计........................................................................................112.2.1脱水装置设计...................................................................................................112.3天然气脱水工艺发展方向............................................................................162.3.1天然气膜法脱水..................................................................................162.3.2天然气超音速法脱水..........................................................................183脱水工艺计算..........................................................................................................203.1原料气及净化气气质....................................................................................203.1.1原料气..................................................................................................203.1.2脱水后净化气的气质条件..................................................................203.2脱水依据........................................................................................................203.2.1贫三甘醇浓度的确定.........................................................................203.2.2三甘醇循环量的确定.........................................................................213.2.3吸收塔塔板数的确定：.....................................................................213.3物料衡算........................................................................................................24II3.3.1脱水量.................................................................................................243.2.2三甘醇循环流量.................................................................