The Modification Of Alcohol Distillation Process Control System In COFCO Biochemical Energy Zhaodong Company

With the rapid development of the production automatic control theory level,industrial control networks’ technology, computer’ technology, in modern industrialfield, occasion for the realization of people-oriented and the humanized managementwork ethic, reducing work intensity of the company employees, increasing thecompany employee’s work efficiency, the company’s production line of automaticcontrol system which must have high reliability, operability and flexibility, thisconcept has become the control system is an important part of the study of industryfield. Cofco zhaodong alcohol distillation process in the original control systemUSES is the United States Honeywell’s S9000/R150control system, the controlsystem in use since the company established, has been used for many years, inalcohol distillation unit running very unstable, often appear crash andcommunication network fault, bring inconvenience, to process engineering operationbring great influence to the production. the renovation plan to use the control systemof Siemens company launched SIMATIC S7-300-PLC (programmable controller)control system, for STEP7programming software, this software advantage many,can achieve a reasonable control program design, programming, to image lifelikereflect the actual operation and operation process of the control system, achieve thecontrol system scheme of flexibility, simple operation, to realize the whole processof alcohol distillation process control.This paper studies the main content is divided into four most. First of all,Designed in combination with alcohol distillation process and the control system ofthe control system of PLC (programmable controller) on the basis of function analysis, fully considering the cost, maintenance, reliability and so on many factors,realize the control system of analog input range switching, analog output rangeconversion, digital manual procedures and main program editing, and other importantfunctions, so as to improve the real-time performance of the whole control system,anti-jamming, can satisfy the actual need in the process of industrial production,achieve the control scheme of flexibility and operability. The control system to therunning parameters of alcohol distillation system, loop control, the PID setting, theequipment running status and on-line monitoring system failure and so on, caneffectively reduce the labor intensity of employees, saving the production cost,improve the anti-interference ability of control system, the system of the automaticcontrol level and reliability of operation, for the sake of the above aspects, this paperfor the purpose of the research topic and significance are further describedSecondly, this paper presents a cofco biochemical energy longjiang companyalcohol distillation process in the existing problems of control system. With thepresent situation of the control system as an example to carry on the empiricalanalysis and research, this paper briefly introduces the process of alcohol distillationprocess and an overview of the alcohol distillation control systems, through theanalysis of the original control system, points out the flaws of the original controlsystem, and discussed. The original control system USES is the United StatesHoneywell to launch S9000/R150control system, HoneywellR150putting-in-service proactively to the development of system of ninety s, often appearin running the failure of hardware and software and communication network. Rununstable, and the system recovery method is tedious, poor safety. R150system isintroduced in the early90s HONEYWELL company products, products have beenconstantly upgrading, so its outdated, already cannot satisfy the complex process andchain control. Again, cofco biochemical energy longjiang company the status quo of alcoholdistillation process control system are discussed in this paper, analyzing the reasonof the problems existing in the control system, mainly alcohol distillation processcontrol system used for years, and the software version is low, operation and itsinstability, in use process controller and industrial computer often appear thephenomenon of crash, communication network and board burn off and on, for allthese reasons analysis, to determine it is necessary to modify the original controlsystem.Finally, puts forward the alcohol distillation control system reformation schemeand concrete implementation plan, through comprehensive analysis, the author fromthe selection of the software of the control system hardware, software applicationdevelopment, the reasonable configuration and the configuration of the programmingof this a few aspects, to control the alcohol distillation system to conduct acomprehensive optimization, eventually achieve the stable operation of controlsystem, ensure the production of the continuous and stable.