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兰州交通大学生物工程课程设计题目：L-乳酸发酵车间工艺设计院(系)别化学与生物工程学院专业生物工程班级生工1201班学号201207724姓名高锐指导教师蔡亚东二○一四年七月摘要L-乳酸是一种极具发展潜力的精细化学品，具有广泛的用途。本设计是以发酵法生产L-乳酸发酵车间的工艺设计，以薯干为原料，对其进行直接粉碎、调浆、液化，然后进行液体深层发酵，以钙盐法提取，最后结晶、干燥得到L-乳酸。其中发酵培养接种量为5%，发酵时间为14h，每升发酵液可以纯化得到L-乳酸产品120g。年操作日300天。发酵罐高4m，直径2m，通气搅拌功率为20.51kW；种子罐高1.4m，直径0.7m，轴功率为3.36kW。本设计总计投资1860万元，预计年销售额5832万元，生产总费用4228.9万元，固定成本217.2万元，最后所得年利润为1385.9万元。本设计以工艺设计为主线，以工艺流程为顺序，画出流程图与设计图，最终设计出年产10000吨的L-乳酸发酵车间。关键词：L-乳酸发酵车间工艺设计工艺计算AbstractL-lacticacidisakindoffinechemicalswithgreatpotentialfordevelopment,whichhaveextensiveuses.ThedesignfocusesonthefermentationworkshopprocessdesignofproducingL-lacticwithfermentationmethod.Inthisdesign,rawmaterialaresweetpotatoes,andtheproductionprocessesisdirectsmashing,conditioningandliquefying,usingthegas-liquidsubmergedfermentation,extractingwiththemethodofprecipitationbycalciumsalt,andfinallyproducingL-lacticacidthroughcrystallizinganddesiccating.Thefermentationinoculumis5%,fermentationtimeis14hours,perliteroffermentationliquidcanbepurifiedandproduce120gL-lacticacid,yearlyoperationtimeis300days.Fermentationtankis4metershigh,diameteris2meters,aerationandagitationpoweris20.51kW;andseedtankis1.4metershigh,diameteris0.7meters,shaftpoweris3.36kW.Thedesignhasatotalinvestmentof18.6millionyuan,expectedannualsalesis58.32millionyuan,thetotalcostis42.289millionyuan,fixedcostsis2.172millionyuan,andtheannualprofitis13.859millionyuan.Thedesignintroducesthedesignandcalculationprocessoftheentireproductionprocessandequipmentindetail,andintroducestheproperties,usesandtheproductionsituationathomeandabroadofL-lacticacidatthesametime.Takingprocessdesignasthemainline,takingprocessflowastheorder,drawingaprocessflowdiagramanddesigncharts,andfinallydesigningaL-lacticfermentationworkshopwithanannualoutputof10000tons.Keywords:L-lacticacid；Thefermentationworkshop；Processdesign；Processcalculation目录0.前言........................................................................................................11.概述........................................................................................................21.1产品概述.........................................................................................................21.1.1乳酸的理化性质...................................................................................21.1.2乳酸的用途及功能...............................................................................21.1.3国内外生产情况...................................................................................31.2设计概述.........................................................................................................31.2.1设计依据...............................................................................................31.2.2设计范围...............................................................................................41.2.3指导思想...............................................................................................42.设计........................................................................................................42.1设计任务.........................................................................................................42.2工艺设计.........................................................................................................52.2.1原材料及产品.......................................................................................52.2.2生产流程...............................................................................................52.3工艺计算.........................................................................................................62.3.1物料衡算...............................................................................................62.3.2能量衡算...............................................................................................72.4设备设计及选型.............................................................................................92.4.1发酵罐的设计.......................................................................................92.4.2种子罐的设计.....................................................................................112.4.3发酵液贮罐的设计.............................................................................122.4.4发酵罐配料罐的设计.........................................................................122.4.5种子罐配料罐的设计.........................................................................122.5废渣处理.......................................................................................................132.6人员组织管理...............................................................................................132.7财务分析.......................................................................................................132.7.1投资分析............................................................................................132.7.2效益分析............................................................................................142.8工厂设计.......................................................................................................142.8.1工厂选址..................