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时间:2020-03-23
《甲醇制丙烯工艺甲醇降级进料的研究.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、第44卷第5期2016年5月化学工程CHEMICALENGINEERING(CHINA)V01.44No.5May2016甲醇制丙烯工艺甲醇降级进料的研究蒋立翔1’3’4,许明2,李占玺3,苏轼3,李初福2,武建军1(1.中国矿业大学化工学院,江苏徐州221116;2.北京低碳清洁能源研究所,北京102209;3.神华宁煤集团煤炭化学工业分公司,宁夏银川750411;4.神华集团有限责任公司,北京100011)摘要:高能耗是制约甲醇制丙烯(MTP)工艺发展的重要瓶颈,甲醇降级进料是MTP工艺降本增效的可能途径。文中首先通过理论分析和流程模拟探讨
2、了MTP工艺中甲醇降级进料的可行性,流程模拟结果表明采用粗甲醇为原料,二甲醚预反应器负荷增加约12%,MTP反应器的转化率不变。在神华宁煤煤化工分公司的MTP装置生产中通过调节工艺参数实现了甲醇降级进料工业实验研究。运行结果表明:MTP装置出口组成和产能基本不变,废水COD有所提高,但在排放标准范围之内,lt甲醇耗低压蒸汽由1.1∥t下降至0.66t/t,每年可节约(折合成燃料煤)14万t、脱盐水15万t、电1.8×106kW·h,节能降耗效果明显。关键词:MTP;甲醇;精馏;流程模拟;节能降耗中图分类号:TQ536文献标识码:A文章编号:10
3、05-9954(2016)05-0001-05DOI:10.3969/j.issn.1005-9954.2016.05.001ReducingthegradeoffeedmethanolofmethanoltopropyleneprocessJIANGLi-xian91'3⋯,XUMin92,LIZhan-xi3,SUShi3,LIChu-fu2,WUJian-junl(1.SchoolofChemicalEngineeringandTechnology,ChinaUniversityofMiningandTechnology,Xuzhou22
4、1116,JiangsuProvince,China;2.NationalInstituteofClean-and—Low—CarbonEnergy,Beijing102209,China;3.ShenhuaNingmeiCoalGroupCoalChemicalIndustryCoaaapany,Yinchuan750411,Ningxia,China;4.ShenhuaGroupCorporationLimited,Beijing100011,China)Abstract:Highenergyconsumptionisabottleneck
5、formethanoltopropylene(MTP)technologydevelopment.ReducingthegradeoffeedrefinedmethanolshouldbeaneffectivemethodtosaveenergyandreduceoperationcostsofMTPprocess.Thefeasibilityofreducingthegradeoffeedmethanolwasinvestigatedbytheoreticalanalysisandprocessoptimization.Thesimulati
6、onresultsshowthatthefeedintothedimethylether(DME)reactorshouldincreaseabout12%tomaintainthesamepropyleneoutput.Finally,theindustrialexperimentswereconductedbyadjustingtheoperationparameterstoreducethegradeoffeedmethanolofthecommercialMTPunitinShenhuaNingmeiCoalGroup.Theopera
7、tingresultsshowthattheproductivityandcompositionofMTPreactoroutletarealmostinvariantwhileCODinwastewaterincreasebutwithindischargestandards.Theconsumptionoflowpressuresteampertonmethanoldecreasesfrom1.1tto0.66t,whichCansave1.4×105toffuelcoalequivalent,1.5×105tdesaltedwateran
8、d1.8×106kW·helectricity.whichprovetheobviousenergy—savingandcost-reducing.K
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