The boiler control system studied in this paper applies advanced PLC, digital adjusting instrument and imported full-automatic combustion process controller, and it is designed to an advanced full-automatic control system of boiler by combing PLC (programmable) technique, technique of digital adjusting instrument and computer and communications technology. Furthermore, it can be connected to industrial control computer to constitute DCS system. This system is a control system specifically developed for the operating characteristics of gas(oil)-fired boiler based on Siemens S7 PLC, which has the excellent quality of industrial control products of Siemens S7 series in the aspect of hardware, and applies the control algorithm of thermal control theory of boiler and the thermal control experience of the boil manufacturer in charge of system design and operation adjustment in the aspect of software, to make the automatic input rate of full load of the boiler realize 100% full-automatic control.
