Project introduction

Project background

Shanghai Tianyuan Group Huasheng Chemical Co.,Ltd. locates in the Shanghai Chemical Industry Park↕ at Caojing, Shanghai. The first period of the project in cludes a suit of bipolar ion-exchange membrane caustic soda equipment< for 360000t/year sodium hydroxide production and 1 suit ♣of Oxychlorination equipment for 360000t/year dichloroethane production. The project pr ovides chlorine and sodium hydroxide to equipment of MDI, TDI and PC etc. and produce₹s dichloroethane using the byproduct hydrogen chloride from MDI and TDI. Since ran 1 year befor↓e, the company has become very competitive in the industry region product link. Meanwhi©le, the company has constructed a basic integration framework on the basis of real-time d‌atabase and provides a convenient and effective information platf↕orm to production and management.

To meet the increasing requirement to liquid chlorine and sodium hydroxide in the Chemical Park±, the company decided to extend bipolar ion-exchang<e membrane caustic soda equipment with production of 150000t/year, abbreviated as ✘sodium hydroxide second period project. The new project is a∏nother key project in the cycling economic link. The main plant locates at north to th‍e Block C2, including units of secondary brine, rectification transformer, electrolysis, dec∑hlorination for diluted brine, chlorine gas treatmenεt, chlorine compress, chlorine liquefaction, hydrogen treatment, hydrogen compress and ☆alkali evaporate etc. so a DCS system is needed to be configured with the featu↓res of advanced and reliable design, compact structure, completeΩly meet the requirement to device monitoring and operation management. PI real-time¶ database interface is also required to transmit the monitoring information collected ‍by DCS system to existing integration system of management and control

Time period of the project

2007.12 – 2008.10

System structure

1. 5 operation station (HIS), which can diagnose the running ₹status of network devices, maintain the data, monitor and process the data. 2 of t∑hem are dual-LCD monitor operation station
2. 1 engineer station (EWS/HIS), the hardware configuration is on the list, which can carrβy out the configuration, maintenance and program install f₩or the system, and also to be an OPC server . OPC interface is pro‍vided.
3. 1 PRM, which can manage the local bus device FF and HART o≠nline
4. 1 off-line configured workstation
5. 1 A4 grayscale laser printer, which is responsible for processing s∏ections report printing and log alarm
6. 1A3 color jet printer, which is responsible for processing sectio✘ns report printing and log alarm
7. All the devices are provided with operation console
8. Vnet connects all the operation stations and engineer stations
9. 3 backup operation console
10. 2 auxiliary operation console, one of the console haδs respectively 10 alarm indicators and buttons