Design And Implementation Of Liquid Centrifuge Controll-program

Liquid centrifuge is a kind of separation equipment. it is a huge high-speed rotation with the centrifugal force to separate and purify substances, in biological research and industrial production widely used. Large liquid centrifuge rapid development in foreign countries, the domestic lagging. Our centrifuge mainlyfrom technology companies directly with foreign centrifuge technology.Its control design mainly has the vibration, the rotational speed, the clean system and so on. The main control method at home and abroad is PLC(programmable logic controller)control.In recent years,some foreign manufactures to start using industrial computer or DCS control system.DCS control with China in centrifuge research in basic blank.This article mainly discusses the control of large-capacity liquid centrifuge design. the use of PLC control program conversion to use the DCS system implementation.This article focuses on the cleaning of the centrifuge program, slag program has been designed, and in accordance with the DCS system-Yamatake DEO systems for programming, configuration, to meet the operational requirements process.In the program design, this paper designed a timer in order to meet the technical staff time to change the time requirements, as well Based on the process proposed centrifuge operating conditions and interlock, using the logic diagram of the programming, the use of the corresponding control pointsand operation of the screen was configured.Focus on the centrifuge cleaning procedures,slagging program was designed.Field instrumentation and valves were analyzed.The circuit schematic and wiring diagram were designed.This article is also on-site instrumentation and valves were introduced to depict the wiring diagram, and make full use of the original devices, spare cables, cost savings, After installing, the measurement circuit and control circuit was debugging, the program for debugging, and the purpose of the study design.This paper proposed an on-site construction standards and requirements, developed a construction material form.This article also realized a project from design to construction and installation of most of the process engineering system design can play a reference.After this control system is operational, the effect is good. The craft operators might momentarily according to the operating mode change cleaning period and the parameter and so on. centrifuge raised the separation efficiency, also has obtained the good economic efficiency.