蒸发耦合精馏处理含盐甲醇废水的MVR节能工艺
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2020-04-07 19:13:01
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第47卷第8期2019年8月化学工程CHEMICALENGINEERING!CHINA)Voe.47No.8Aug.2019蒸发耦合精X处理含盐甲醇废水的MVR节能工艺杨德明,印一凡,王争光,殷学明,高晓新(常州大学石油化工学院,江苏常州213164)摘要摘要:针对分离含盐甲醇废水体系能耗高的特点,运用了MVR热泵技术,将蒸发与精X有机地耦合在一起。在单效蒸发耦合常规精X工艺的基础上,提出了MVR蒸发耦合常规精X及热泵精X工艺以及带预热的MVR蒸发耦合热泵精X工艺。选用修正后的ELECNRTL电解质热力学模型,以能耗和年总费用(人13)最低作为目标函数,对以上提出的几种工艺进行模拟与优化。研究结果表明:基于MVR蒸发的基础再应用热泵技术更具经济优势,可以分别减少ATC和能耗17-18%和45-37%。带预热的MVR蒸发耦合热泵精X工艺与MVR蒸发耦合热泵精X工艺相比又可以减少AC8.12%,减少能耗27-1%,是处理含盐甲醇废水的最佳工艺路线°关键词关键词:含盐甲醇废水;MVR热泵技术;年总费用;能耗中图分类号中图分类号:TQ028文献标识码文献标识码:A文章编号文章编号:1005乙954(2019)08乙072乙4DOI:10.3969/j.ion1005-9954.2019-08-014MVRenergy-savingtechnologyfortreatmentofmetUanolwastewatercontainingsaltbasedonevaporationcouplingdistillationYANGDeming,YINYiban,WANGZherg-guang,YINXur-ming,GAOXiao-xin(ColbgeofPetrochemicalEngineering,ChangzhouUnOersits,Changzhou213164,JiangsuProvince,China)Abttract:Duetothehogheneegyconsumptooneoesepaeatoonoemethanoewastewateecontaonongsaetsystem,MVRheatpumptechnoeogywasadoptedtocoupeeeeapoeatoonanddostoeatoonpeoces.Onthebasosoesongee-eeecteeapoeatooncoupeongwothconeentoonaedostoeatoonpeoces,MVReeapoeatooncoupeongconeentoonaedostoeatoonandMVRdostoeatoonpeocesandMVReeapoeatooncoupeongheatpumpdostoeatoonpeoceswothpeeheatongweeepeoposed.ThemodoeoedELECNRTLelectrolytemodelwasselectedtosimulateandoptiTzotheaboveproposedprocesses.Lowestencgyconsumptoonandannuaetotaecost(ATC)weeeappeoedasob.ectoeeeunctoons.TheeesuetsshowthatheatpumptechnoeogybasedonMVReeapoeatoonhasmoeeeconomocadeantages.NtcaneeduceATCandeneegyconsumptoonby17.18%and45—7%,—spctivly.ComparedwithMVRevaporationcouplingheatpumpdistillationprocess,MVReeapoeatooncoupeongheatpumpdostoeatoonpeoceswothpeeheatongcaneeduceATCby8.12%andeneegyconsumptoonby27.41%,whichisthebestprocessfortreatingmethanolwastewatercontainingsalf-Keywordt:methanoewastewateWcontaonongsaet;MVRheatpumptechnoeogy;annuaetotaecost;enegyconsumptoon含盐有机废水主要来源于化工、医药、农药等行业,排放总量有逐年增加的趋势[1]'处理这种废水通常采用蒸发和精X的方法,而蒸发和精X往往需要消耗大量的能量,导致处理成本越来越高对于蒸发过程的节能,目前可应用的手段有多效蒸发技术(MEE)、热力蒸汽再压缩技术(TVR)和机械蒸汽再压缩技术(MVR)。目前,MVR蒸发技
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