Project introduction

• Project background

Puyuan Hesheng Water Treatment Co., Ltd locates at the Puyuan k₹nitting industry park in Tongxiang. In 2010, the companγy received an investment of 2.7 million Yuan and enhanced the existing wastewater treatment cap&acity by processing upgrading, technique improving and device updating. The capacity ofβ wastewater treatment achieves 50000t/day. Automated monitoring technology is used in the proc★essing design to meet the requirement to modern integrated processing' and the management of processing center. The central control system in the processing cent≥er works as the central nervous system of the factory. It not only controls and moni↔tors all the equipment running in the factory, but also automatically collect s and stores large amounts of processing data to do t♣he analysis and process. The central control system of process"ing center uses digital information technology such as industrial Ethernet, PLC workstatio↕ns and process control sensors etc.

• The time period of the project

From October, 2010 to November, 2011

• System structure

Central control system

1 suit of engineer station (SIEMENS STEP7 software implemented), 2 suits of remoter op∑erator stations (NETSCADA software implemented), 1 network printer, 1 projector and 1 suit☆ of digital radio.

Network system

2 suits of HISCOM industrial level switches construct the fiber network while↔ 2 digital radios constructs wireless transmission network

Field control system

1 suit of PLC control cabinet (SIEMENS 300 series PLC implemented‌), 1 suit of PLC control console (SIEMENS 200 series PLC implemented‌), 19 suits of field instruments (including curre¥nt acquisition unit, thermal mass flowmeter, MLSS analyzer, ultrasonic liqu±id level meter, DO Analyzer, PH meter, On-line Total Phos'phorus Analyzer, COD on-line analyzer etc. )

Main screen control system

1 suit of projector and projection screen, 1 suit of dual-screen video adaptor to sw↕itch the display on screen and projector

Local bridge and pipe

Weak power source and Signal Bridge, branch pipe and sample p∞ipe etc.

Network topology