Design and Application of Energy Source Data Collection and Centralized Monitoring System in Cigarette Factory

The original centralized monitoring system for air conditioning and air compression systems in Xinzheng Cigarette Factory has the shortcomings of slow response, low reliability, poor resistance to distur-bance and insufficient control functions, therefore, an energy source data collection and centralized monitoring system was established by using PLC and fieldbus technology, computer network communication, and software technology.The system's management level is a SCADA system of C/S structure, its process control level is a PLC platform based on Siemens S7-300/400, and equipment control level consists of field control devices.The system has 3 operating modes:automatic, remote manual and on-site manual.By perfecting the control function of energy saving running of air conditioning, linking the internal data of air compressor to the network, and installing a DLP big screen and etc., the centralized remote control of every subsystem was implemented.The practical application indicated that water consumption per 10000 cigarettes reduced from 81.89 kg to 66.34 kg, electric power consumption from 4.5 kW·h to 4.3 kW·h, steam consumption from 0.08 kg to 0.06 kg, respectively;and about 4825 thousand RMB Yuan was saved per year.