30万吨/年乙烯裂解气脱甲烷系统工艺设计PAGE-2-摘要摘要：在乙烯生产中，脱甲烷系统的能量消耗相当的大，大约是整个分离系统能量的50%，确立一个能量消耗低、投资小、流程简单的脱甲烷系统流程相当的重要。这次设计过程中将首先对几种分离方法做简单的比较，然后选择技术成熟、操作稳定、产品纯度高、能耗低的深冷分离法。从能耗来看，在深冷分离的三种流程中，以顺序流程的能耗最低。流程确立后，将要根据已知产品的产量和要求，对整个脱甲烷系统工艺流程进行相应的计算，确定各部分的操作条件，然后对主要的分离设备的工艺尺寸计算，并做出流程图和主设备图。关键词：乙烯；脱甲烷塔；深冷分离；乙烯生产AbstractAbstract:Intheproductionofethylene,energyconsumptionofdemethanizingsystemisratherremarkable,aboutaccupyingtheseparatesystemof50%entirely,establishoneenergyconsumptionlower,littleinvest,thesimpleflowofdemethanizingsystemisequaltoimportance.Atfirst,comparedtoseveralkindsofseparationmethodsinthisdesign,thenchoosematuretechnology,operatestability,andproduceproductquality,whichisseparationbydeeprefrigeration.Accordingtoenergyconsumption,inseparationbydeeprefrigerationincludethreekinds,butitisthelowestenergyconsumptionofsequentialprocess.Afterprocessestablished,accordingtotheproductofoutputandtherequestofprocessrequirements,demethanizingsystemofprocessflowgoingoncorrespondingcalculation,andconfirmtheoperationconditionofeverypart,thencalculateanyonewhichareseparateequipment,processanddimension.Anddotheprocessflowdiagramandthemaindrawing.Keywords:Ethylene;Demethanizer;Separationbydeeprefrigeration;Ethyleneproducing.目录TOC\o"1-4"\u1绪论PAGEREF_Toc75166747\h11.1乙烯裂解气分离技术的现状PAGEREF_Toc75166748\h11.2乙烯脱甲烷系统设计的目的、意义PAGEREF_Toc75166749\h11.3设计过程主要解决的问题PAGEREF_Toc75166750\h21.4设计的指导思想PAGEREF_Toc75166751\h22脱甲烷系统流程及基础数据PAGEREF_Toc75166752\h32.1脱甲烷系统流程的确定PAGEREF_Toc75166753\h32.1.1后脱氢高压深冷法PAGEREF_Toc75166754\h32.1.2前脱氢高压深冷法PAGEREF_Toc75166755\h32.1.3带膨胀机的前脱氢高压深冷法PAGEREF_Toc75166756\h32.1.4带C2回收塔的高压脱甲烷法PAGEREF_Toc75166757\h32.1.5前脱氢低压深冷法PAGEREF_Toc75166758\h42.1.6结论PAGEREF_Toc75166759\h42.2设计基础数据PAGEREF_Toc75166760\h52.2.1设计要求PAGEREF_Toc75166761\h52.2.2基础数据PAGEREF_Toc75166762\h53工艺过程计算PAGEREF_Toc75166763\h83.1分离器的计算PAGEREF_Toc75166764\h83.1.1分离器的操作参数PAGEREF_Toc75166765\h