基于PLC的污水处理系统外文翻译

1、昆明理工大学大学毕业设计英文资料与中文翻译专业班级：自动化112 班学生姓名：何荣法指导教师：张光辉学院：信息工程与自动化学院2015年 5月Applicationof controlsystem on the base of PLCinsewage treatmentThe paper introduces a distributed control system of sewagetreatment,and the core of the system is PLC. The structure of the control system, the assignmentand implem

2、entation of the tasks,the control schemeand the design concept of programare expounded.The way of central monitoring managementand dispersingcontrol is used by the control system; the long 一 distance control and monitoring of field equipmentare unchargedof the uppercomputer;the softwareprogramof des

3、ignsuses Intouch7. 0. The specific technology, equipment, the controlling of main parameter and severalrunning dataare unchargedof thePLC stations,andthe software program of designsusesConcept2. 2XL with online tracking and outline simulating. MB+ net is adoptedby the communication betweenthe upper

4、computer and the PLC stations, with its simply building net, quickly running and stable communication. Theautomatic control of PLC has been successfully completed in sewage treatment,which has improved the operation efficiency and management level of sewagetreatmentequipmentIntroduced to take PLC as

5、 the distribute type control system of core in thewastewatertreatmentsystemof apply. Concretely describedthe structure, mission ofthe control systeman allotment and carry out, the way of control and the thought ofthe program design. The way controlled the concentration monitor of the systemadoption

6、a managementand scattered a control, the place of honor machine be responsible for the spot the long range of the equipmentscontrol and surveillance, software adoption Intouch7. 0 draw up. The PLC native station is responsiblefor to the concretecraft, equipmentand is mainly controlled parameterto ca

7、rry on controland collect various movementdata, the program design adoption have on-line follow with off-line imitate the Concept of true function 2. 2 XL software. Place of honor machine and of the PLC adoption set the net be quickly simple and circulate speed, correspond by letter the stability st

8、rong MB net. The whole control system successfullysolved the PLC controls a problem in the automation within wastewater treatmentand raiseda wastewatertreatment equipmentsto circulate an efficiency and managelevel.Recently, for carrying out high quality, low consume, stable dependable movement. Dome

9、stic and international many wastewater treatment factoriesadopted a modern forerunner to control technique and calculator technique and constitute calculator direct, control thus, manage system. Make system excellent to turn movement. But the programmable logic controller(PLC) then take microprocess

10、or as core. Synthesize the calculator technique automatically controls techniqueandcorrespondencetechniquebut developsof a kind of new andin general use automatic control device. Have structure simple, function superior, dependable sex Gao, work properly words in general use, be easy to plait distan

11、ce, usage convenienceetc. advantageetc. The silver City the first wastewatertreatment factory adopteda SBR craft and take PLC as the control system of core, day after handling the sewage 10 104 t the processing of reach mark sewage can used for an agriculture irrigation.1 ControlsystemstructureContr

12、ol the way of concentration monitor management,scattera control of the systemadoption. The emulation hold, place of honor machine,gathera line machine, printer to Be located on medium control room, two set PLCs are located on control the spot. Adopt this kind of structurecan make the information in

13、the production line can centralized management with carry out whole operation, management with excellent turn. Also make to control dangerousdispersionin the meantime,raise the systemcredibility.1.1The uppercomputersMedium control two calculator adoption PII class works of room to control machine, c

14、irculate the operate systemof Windows NT. The place of honor machine be responsible for on the scene establish each long range control(full-automatic control, automatic control, order to move a control) with surveillance, make use of Intouch7. 0 engineeringsoftware packagesprovide a good personmachi

15、ne dialogue boundary but obtain concerning parameter and equipments appearanceinformation from the PLC by searchinga way,keep a view manifestation to come out on the CRT by good sketch type, print a necessarydatain the meantimeand be provided for lord to control and manager instruction produce. Supe

16、rvise and control boundary but include the system total diagram, system cent diagram, imitate the quantity general chart, parameter a constitution, report to the police a window, history trend and register a window etc. boundary but. In the system total diagram, circulate the personnelcan keep watch

17、 on signals, such as all movement appearances,equipments trouble and liquid which control an equipment anddischargeetc. Operatea personnelin the system the cent the diagram can carry on a single machine point to move to circulate an operationto all control equipment,becomethe setautomatically circul

18、ate operation or the whole factoriesfull-automatic operation combine surveillance. In the meantime place of honor machine 2 and do a plait distance a machine. Medium control room to establishanotheran inset type emulation to hold, is beenone control by the place of honor machine, in order to keep th

19、e craft process of the view manifestationwhole factory andmain parametervalue.1. 2The PLC standAccording to wastewater treatment of two part, the spot the long range of the equipments the control output and the spot the signal collect to control a station completion from two PLC wood ground.PLC1nati

20、ve control stationcontrol the space grid, sewage promote a pump house,Pu spirit to sink sand ponds etc. to prepare a processing part. The PLC2 native control station controls dirty mire to dehydrate, press to filter machine etc. department.PLC3 native control station control SBR living creature proc

21、essingpart. Moreover, the on the spot native control station is eachto establishan operation terminal to establisheach,be responsiblefor at native to establisheachcontrol on the scene.(automaticcontrol, order to move a control)The spot is each the physical parameter that the supervision order and in

22、clude water level, temperature, discharge and turn soon, electric currents etc. imitate quantity, from to in responseto of an appearancespreada feeling machine or change to send to a machine examination to come out and change into the electric current signal of the 420 mA, through shield inside the

23、PLC that the electric cable sendsto each statures system, from the PLC picks up a people through various mold piece sampletelecommunication number.Same,imitate quantity control the signal sendto performanceorganization by the 420 mA electric current form after being output by the PLC, control perfor

24、manceorganizationof action.The QuantumseriesPLC of Schneidercompany is satisfy liberal of, accordingto standardof network conjunction and the spot total line conjunction etc. application the technique provided various network a choice, support Modbus, Mod-bus Plus(MB+), the long range I/0, TCP/IP et

25、c. network conjunction, have stronger and vivid. Therefore, the wastewatertreatmentis convenient to arrive of the PLC choose the seriesof MO of useSchneider.1. 3 CorrespondencesMB agreement is the M company release of an open type of the adoptionIEEE802. 4 correspondby letter 5 agreementsthe spot to

26、tal line of card agreement. MB the network together other networks compare to have a set of net simple, the investment be little, network speed quick, correspondencethe stability strong etc. characteristics,it make calculator, controller and other data sourcesthrough an usage double wring line or fi

27、ber optic cable Be a body to togethercarry on correspondence at the whole network top. But the CPU mold piece of the MQ seriesPLC imply MB correspondence,therefore correspond by letter a network to choose to use MB network. Medium control two machine,two control stationswith native PLC of room to pa

28、ss MB the network link together. The PLC CPU mold piece passes MB correspondenceandtwo machinescarry on datacommutation andcollect the place of honor supervision various operation instruction of the system and the spot the examination signal and data, through analysis handle,passexportation mold pie

29、ce to control object output control signal; In the meantime,the PLC passesMB net upward the machine return to various data, place of honor machine logarithms according to carry on anoperation processing,show various signal andprint various statement.2The designof PLC controlprogramThe systemhasfour

30、kinds of control methods:The native handmovesa control, single set equipments point moves a control, become a set, the equipments automatically controls, the whole factory equipment full-automatic control. Two kinds of ex- with generalmethodsat establisheachadjust to try or maintain usage,the system

31、 is mainly circulate with full-automatic control. Under this kind of way, all eachkind of equipment from PLC accordingto in advancedraw up of procedureauto control, dont needto operatea personnelan intervention. Variousspot dataspreadsa highestmachine through a PLC, come out in the place of honor on

32、 board description and makethe craft, equipmentsmovementof whole factoriesget an overall control.The living creature processing part of the PLC3 station control is the whole wastewatertreatment of key part, be limited by space,only with the PLC3 stand of program designfor example.2.1Processof contro

33、lThe PLC3 stations were used to control to get into Pu spirit from sewage,the pond is everywhere sewagerun off Pu after managespirit the whole processof the pond. Include turn of sequenceandtime- switch moderatebreezesmachineof control various valve, pump, breeze machine to soon regulate etc. in thi

34、s process.The Pu spirit pond is the core of wastewatertreatmentto constructa thing, sewageis to comeand go through a microbial living creature oxygenation in the pond in addition to organicmatter, the processingeffect of contentto sewageof the oxygen in water is to go to a passimportant .Requestacco

35、rding to the SBR craft, the deliquescenceoxygen in the Pu spirit pond content usually controls within the scope of 13 mgs/L and annoy a stageendto fuse anoxygen content in the Pu shouldbe not over the 2 mgs/L. Contain the oxygen once measuredlow or lead Gao, all will influence a fluid matter quantit

36、y. Handle 4 setsof the 10 104 t the SBR of 8 pond modesto respondpond to the day,eachone respondsthat the pond go togetherwith a pedestalfrom changePin machine control of breeze machine, used for annoying pond Pu spirit to by turn provide oxygen toward two Pus. Establish 4 pieces of deliquescenceoxy

37、gen test instruments in the different location of each Pu spirit pond, measure contain of sewage amount of oxygen in pond, the PLC separatesa 5 mines to examine a deliquescenceoxygen in a Pu spirit pond value eachtime, accordingto fuse oxygen of averagevalue to control breezemachine to turn soon. If

38、 fuse oxygen low limit at the bottom of the enactment, the frequency modulation breeze machine turns to soon increase 5%;If fuse oxygen Gao while set upper limit, the frequency modulation breeze machine turns to soon lower 5%.So, carried out Pu spirit pond to provide automatically regulate of the am

39、ount of oxygen, since avoided unnecessaryenergy loss,againexcellent turned movementcraft.2. 2The designof PLC programThe adoptive plait distancesoftware is a Concept 2. 2 XLs. Concept is according to under the Windows of the PLC plait distancetool, havegood customersinterface, and have on-line follo

40、w and off-line imitate true function. The control procedureof PLC3 stations is divided into five proceduremold piece.(1)Public mold piecesof procedureuse-includea beginning to start to turn part, hour cent secondetc. ask pulseunit, SBR to responda period enactment,fuse oxygen enactment.etc.(2)Order

41、control mold pieces of the switch quantity -the coordination control report to the police of circulate and related breakdown of equipment, such as each valve, pump and breeze machine.etc. The enter of SBR pond spirit valve, enter water valve, reflux pump, surplusdirty mire pump from PLC accordingto

42、the craft of the wastewater treatment period time segment control, water valve from PLC according to craft time andsupervoice liquid the measuredvalue of the instrument to control.(3)Protection mold pieces of the off-power-system power failure after, the PLC saves all appearance locks and make after

43、 treating to add an electricity PLC instaurationkeepof the appearancecontinue to circulate.(4)Mold pieces of correspondences-use to complete PLC and various data transmissionof placeof honormachine.(5)Fuse an oxygen value to automatically regulate a mold piece-according to fuse an oxygen value to re

44、gulatebreezemachineto turn soon andreport to the police of related breakdown. The target which regulatesto turn soon promises the be worth of deliquescenceoxygen as 2 mgs/L in the whole Pu spirit period. Adoptive control strategyis asfollows: The Pu spirit period beginning, thebreezemachine at top s

45、peed movement attains a 2 mgs/L in shortly of the hour ask by making deliquescence oxygen and take 5 mines asa period to examinedeliquescenceoxygen to be worth in the meantime. When fuse an oxygen value big at the 2 mgs/L, the breezemachine turns to soondescend5%;When fuse anoxygen value small at th

46、e 2 mgs/L, the breeze machine turns to soon rise 5%.If the breezemachine turns to soon rise to allow of tallest turn soon,fuse an oxygen value return small then maintain tallest to turn soon at the 2 mgs/L. This kind of circumstance may annoy the last phase of period to appearin the Pu, but also wil

47、l not clearly influence wastewatertreatmentquality.Superviseand control an exportation electric current of changethe Pin machine value at any time in the Pu the spirit of the whole period, make it not exceedchange the sum of Pin machine settle a value. If meet a surprised circumstanceto make to outp

48、ut electric current exceedwhen the sum settle value, immediately lower breeze machine to turn soon. If the breezemachine turns to soondecline to allow of lowest turn soon, output electric current to return exceed the sum settle a value, then stop breezemachineand sendout to report to the police sign

49、al in the meantimeAlong with automatic control technical development,the UNITANK craft more and more getsextensively applied. Regardexperienceas principle currently, use DO, time, dischargeas a craft control parameter,adjust the Pu spirit circulate of machine and line up mire the etc. lack accuratem

50、athematicsmodel to carry out the automatic control of higher layer of SBR method for time. Someoneonce put forward took the COD or the do as parameterof misty control of thought. The researchdirection of the automatic control of SBR method mainly is to look for several control parameters from now on

51、, since can reflect into water of fluid matter water quantity variety and reaction process in of decline a solution circumstance, and then can do for thecalculator control parameter.The PLC gathers in proper order control and processto control at the integral whole and have dependablesex Gao, usagec

52、onvenience,vivid, set net simple of the characteristicsbe the emollient tool of the small scale industrial automation in the realization. In the wastewatertreatment,accordingto PLC control systemat solid sex, credibility, accurate sex etc. dint a but satisfied a design a request, promised wastewater

53、treatmentof smoothly progress.Becauseof Internet fast development,hope can come to visit to ask wastewater treatment factory through an Internet of from control system, the Internet which neededto input usersnameand passwordand then can carry out long rangecameto carried on a control to the equipmen

54、tof whole factories. Transportthe sewagedataof wastewatertreatmentfactory to the national environmental protection bureauthrough an Internet in the meantime city environmental protection bureau perhaps, for the purpose of the Bu class management of section to wastewater treatment factory.基于 PLC的控制系统

55、在污水处理中的应用介绍了以 PLC为核心的分布式控制系统在污水处理系统中的应用。具体叙述了控制系统的结构、任务分配及实现、控制方式和程序设计思想 . 控制系统采用集中监测管理、分散控制的方式，上位机负责现场设备的远程控制和监视，软件采用 Intouch7.0 编制。 PLC本地站负责对具体的工艺、设备、主要被控参数进行控制及采集各种运行数据，程序设计采用具有在线跟踪和离线仿真功能的 Concept 2.2XL软件。上位机与 PLC之间采用组网简单、运行速度快、通信稳定性强的 MB+网。整个控制系统成功地解决了PLC在污水处理中的自动化控制问题，提高了污水处理设备运行效率和管理水平。近年来，为了

56、实现高质量、低消耗、稳定可靠的运行。国内外许多污水处理厂采用了现代先进控制技术和计算机技术，从而构成计算机监督、控制、管理系统 . 使系统优化运行。而可编程逻辑控制器（ PLC）则是以微处理器为核心。综合了计算机技术自动控制技术和通信技术而发展起来的一种新型、通用的自动控制装置。具有结构简单、性能优越、可靠性高、灵话通用、易于编程、使用方便等优点等。银川市第一污水处理厂采用了 SBR工艺及以 PLC为核心的控制系统，日处理污水 10 x 104 t 处理后的达标污水可用于农业灌溉。1 控制系统结构控制系统采用“集中监测管理，分散控制”的方式。模拟屏、上位机、集线器、打印机位于中控室，二台 PL

57、C位于控制现场。采用这种结构可使生产过程中的信息能够集中管理，以实现整体操作、管理和优化。同时，也使得控制危险分散，提高系统可靠性。1.1 上位机中控室的两台上位计算机采用PII级工控机，运行WindowsNT操作系统。上位机负责现场设各的远程控制( 全自动控制、自动控制、点动控制) 和监视，利用Intouch7.0 工程软件包提供良好的人机对话界而，以查询方式从PLC获取有关参数和设备状态信息，以棒图形式在CRT上直观显示出来，同时打印必要的数据，供主控及管理人员指导生产。监控界而包括系统总图、系统分图、模拟量一览表、参数设置、报警窗、历史趋势、登录窗等界而. 在系统总图里，运行人员能够监视所有控制设备的运行状态、设备事故及液位、流量等信号. 在系统分图里，操作人员能够对所有控制设备进行单机点动运行操作、成组自动运行操作或全厂全自动操作并监视。同时上