The Study On The Automatic Control System Of SBR Wastewater Disposal Process

With the promoting of city process, the number of the little city is increasing, the question of water pollution is more and more serious. Sequencing Batch Reactor (be called SBR) is fit for basic demand of little city's waste water disposal, but it must realize automatic control,thus, it can develop its superiority, has the more broad foreground.This article introduced the process of SBR waste water disposal technology and its automatic control system; Studide the inside structure, control regular, main feature and design method of SBR technology automatic control system; Adbance Filedbus net technique is applied to waste water disposal system. "SBR waste water disposal technology automatic control system based on the PROFIBUS net " is developed. PROFIBUS net is the core of this system, PLC is the control subject, computer is the work platform of system write program,defend, monitor control and manage. Realized integration of SBR waste water disposal technology produce field net communication and computer control system.Automatic control system adopt distributed filedbus Control System. Control object conclud tempreture,DO, pH and liquid seat and so on. The compute is maden on as manage level, adopt visual basic 6.0 to develop communication program,interface program, data disposing and figue tab out program, finish operation import of setting value,communication with lower level PLC,system alarm,manage motion ets function. PLC is the key of realizing system function as control level, it accepts the manager order,collect data,output the control signal etc. Field level is composed of intelligence meter,control equipment etc, it is the base of realizing system function, it transforms the signal,transmits data, carry out the control...