The Design of Control System for the Boiler Based on PLC
Abstract
Many existing industrial boiler of our country, have problem of low automatization, the thermal efficiency of these equipments are only about 40%.Along with the economic growth mode of business enterprise change to depend on progress of technique, the request of automatization becomes more and more urgent, change traditional manual、semiautomatic operational manners, carry out automatic control and manage, improve thermal efficiency of boiler, guarantee safe running of equipment becomes quite necessary.
At present situation economize energy and protect environment are being paid more and more attention, design of control for industrial boiler, accord with guarantee safe work, should make it work under optimal condition which minimum the loss of combustion, pollution of environment, maximum thermal efficiency. Current it is already become the most important topic of automatic control of industrial boiler.
The boiler is a kind of important equipment in plants .The control aim of boiler is to supply regular stream to fulfill factory needs. So to control boiler’s parameters is of great importance. An automation control system for industrial boilers is designed in this thesis, after determining the architecture of the control system, the paper discusses the design of control algorithms of the boiler system. Because the algorithms of the feed water control、combustion control and the temperature of the super heater vapor control determine the control effects of the system, and it is hard to get better control accuracy with the traditional manual operation and analogue instruments, so this paper will combine PLC、Configure software with industrial control computer, and substitute the advanced algorithm of computer control for the traditional control algorithm. According to the control algorithm, the control system can be easy realized, and get better control effect.
