Monitoring&Control System of Sewage Treatment Factory

Itis used to realtime monitor, control, dispatch and manage sewagetreatment process. It is in staple structure and two PLC monitoringand control hosts are mutually redundant. It is characterizedby strong adaptability, high reliability, good open performance,easy extendability and economic practicability with applicationsof simplified logic control and complicated decentralizationcontrol.
This system can be divided intoadministrative layer and monitoring and control layer.
Theadministrative layer consistsof network server, workstation, printer and UPS. The networktransmission medium is optical fiber and twisted-pair cableand the data transmission employs rapid Ethnet, IEEE802 Standardwith rate of 100Mbps. It can be extended and networked. Thesystem software has powerful functions to achieve remote adjugementand management through INTERNET.
Themonitoring and control layerconsists of PLC host, industrial controller, printer, UPS, operationdest, mimic board, large-screen display, color screen projectorand others like PLC outstation/remote I/O station, assistantrelay case, high-low voltage switch case, machine side controlcase as required in the spot. The data exchange between monitoringand control equipments and PLC, PLC and industrial controllersemploys DH+ net (of AB Company) or MB+ net (of Modicon Company)or GCM+ net (of GE Company) to achieve realtime monitoring andcontrol.

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Realtime collecting the parameters likeincoming water flow, sewage concentration, PH value, water levelaround corse-fine grid, water level of absorbing well in pumproom, water level of oxidation ditch, fore-and-aft stage dissolvedoxygenquantity of mud reflux, concentration of mudreflux, left mud flux, liquid level of drug pool, weight ofchlorin bottle, outgoing water flow, and ammonia and nitrogenand turbidity and PH value of outgoing water;

Detect and control the status of thecorse-fine grid, elevator pump, electro valve, agitator, surfaceexposal machine, truss frame of final sand pool, left and refluxmud pump, spin-drier and other equipments of drug and, chlorizationfeeding and power distribution.

Dynamic display the general drawingand individual drawing of the whole process and the status andparameters of equipments;

Fault alarm display and alarm managementlike statistics analysis, printing and storage;

Daily operations like data processingand storing, information search and outputting of managementstatement;

With Excel Access, the system can installhistory database, and establish files to analysis and processall the database and output the needed production report;

The software is suitable for all complicatedprocess flow with its modular structure which is convenientfor parameters setting and modifying.