Distributed Control System Design For Heating Coal-Fired Boiler

The industrial boiler which is providing a kind of very important driving force for the equipment and energy,is also the very important central heating and the main heating equipment for the building in our north China,its working process is based on the standard of process and load to produce steam or hot water with certain pressure and temperature.Distributed control system of coal-fired boiler is a computer monitoring system that detects and displays the thermal parameters of the boiler,controls the operation of the boiler,and implements protection and interlocking to ensure the economy and safety of the boiler operation.The article mainly presented the development status and process flow of central heating boilers and small-scale automatic control system,and on this basis,the process characteristics of coal-fired boiler are analyzed and designed.The process flow and design scheme of distributed control system for heating coal-fired boiler based on industrial control computer are studied.And the combustion control system of coal-fired boiler and the control method of drum water level control system are studied and designed in the paper too.Based on the industrial control configuration software,the boiler monitoring software and other systems are developed,which can help to realize the functions of automatic load regulation,real-time display of system parameters,data history record,fault safety protection and alarm,report printing and so on in the distributed control process of heating coal-fired boilers.At the same time,the development and design of process control loop and data acquisition module,fault interlocking module and so on are completed based on PLC in the article.The field debugging and running process of the control system and the results show that the system runs reliably and stably,and meets the requirements of various industrial designs,and improves the production efficiency of the equipment.