液相传输系统DCS控制系统设计
毕业论文关键字;流体输送；输送机械；泵
LiquidtransmissionsystemDCScontrolsystemdesign
Abstract：Fluidtransfermachinery(FluidTransportationMachinery)inindustrialprocesses,fluiddeliveryisthemostcommonunitoperationsevenindispensable.Fluidtofluidtransportmachineryisactingtoimprovethemeansoffluidmechanicalenergy,soenergyisavailableafterfluidtransportmachinerytobeusedtoovercomethefluiddeliveryalongthemechanicalenergylosses,improveandincreasefluidpressurepotentialenergy(ordecompression).Typically,thetransmissionfluidmachinerycalledpump;pressuregastransportationmachinerytoproducetheleveloftheirfansarecalled,blowers,compressorsandvacuumpumps.Oneclassofgeneralmachineryfluiddelivery,anditsfunctionistopassenergymotororotherprimemovertothefluidisdeliveredtoimprovetheflowofbits(ie,fluidunithasmechanicalenergy).Theamountofenergyflowingthroughtheunitisimportanttotheperformanceoftheresultingfluidfluidtransfermachinery.Headwithheadorpressureofaliquidtransportationmachineryperunitweightoftheliquidobtainedbymechanicalenergy;windpressuregastransportationmachinerytorepresenttheunitvolumeofgasobtainedbymechanicalenergy.Similartypesofgasandliquidtransportationmachineryprinciple,butbecausethegasdensity,andthereiscompressible,sothetwoaredifferentinstructure.Inthechemicalindustry,thenatureoftheliquidbeingtransportedvary,therequired
flowrateandpressureheadareverydifferent.Tomeetavarietyoftransporttasks,manytypesofpumps.
Keywords:Fluidconveyance;transportationmachinery;pump
目录
1绪论 1
2传输系统DCS控制系统设计 1
2.1设计目的 1
2.2设计原理 1
2.2.1流体流动阻力特性测试与计算 1
2.2.2离心泵特性曲线测定 2
2.2.3流量计校核原理 4
2.3被控对象——流体输送实验装置介绍 6
2.3.1装置介绍 6
2.3.2实训工艺流程 6
2.3.3装置仪表及控制系统一览表 8
2.3.4设备能耗一览表 9
2.4设计内容 9
2.4.1开机准备要求 9
2.5实验一离心泵流量控制实验 12
2.6实验二高位液位罐液位控制实验 13
2.7实验三旋涡泵流量控制实验 14
2.8实验四离心泵特性控制实验 14
2.9实验五流体流动阻力曲线测定实验 19
2.10实验吹冰孔板流量计校核实验 21
2.11实验八真空泵输送实验 23
2.12实验九压力输送实验 24