全燃烧高炉煤气锅炉炉膛负压模糊控制系统

Fuzzy Control System for Hearth Pressure of Blast Furnace Gas Fired Boiler

燃高炉煤气锅炉在燃料燃烧和运行方式上与传统的燃煤锅炉区别很大,使得燃煤锅炉控制方法不适用于燃高炉煤气锅炉。为提高炉膛负压控制精度,引入了模糊控制策略对炉膛负压进行控制。采用炉压偏差及偏差变化率作为模糊控制器的输入变量,仿真研究表明,经模糊控制器控制的炉膛负压稳定性较采用PID控制方法有显著提高,更适合于炉膛压力的控制。

There is a great difference between blast furnace gas fired boiler and coal fired boiler in the fuel combustion process and the method of operation, so the control model for coal fired boiler can not be applicable for blast furnace gas fired boiler. To increase the control accuracy of negative pressure in hearth, a fuzzy control strategy was applied to the negative pressure control, which used the deviation and deviation variance ratio of combustion chamber draft as the input variables of fuzzy controller. The results of simulation indicate that the stability of negative pressure in boiler is greatly improved by fuzzy PID control compared with traditional PID control, so it can meet the control requirement of boiler negative pressure.