Study And Application Of Hot-blast Stove Control System

The hot-blast stove burning process is a complex industrial pross.The features of multi-variable,nonlinear large time-delay,changeable parameters,and hard in modeling are the major control challenges in the hor-blast stove burning process.The ratio between air flux and coal-gas flux is key factor affecting the burning process.It is the key problem to set up proper coal-gas flux and air flux to ensure the hot-blast stove burning efficiency.The burning process for hot-blast stove is of complexity and there are many parameters need to monitor.To measure these parameters including temperature,gas fluxand gas pressure and phases control.Through profound research on the characters of gas flowing in hot-blast stove,a expert and fuzzy control model based on the relationship between the valve executing and the gas flux is established to adjust valve executing when the gas flux varies.So that,hot-blast can be maintained the optimal burning process.Shougang Iron and Steel Co.paper Qian’ an Iron Works No.2hot-blast stove control system for the study background,access to a large number of relevant literature, based on an overview of control technology development process, the stove automatically control method for in-depth research.Mainly accomplished the following areas:An overview of control theory, analysis of the factors affecting the combustion, an overview of the stove combustion control technology and trends. Introduced of the principle of hot air furnace combustion control, discusses the stove automatic burn control methods and control parameters of significance.Hot-blast stove for combustion control is to improve the quality of hot-blast important means of hot air. Fuzzy control theory is introduced to the stove automatic combustion control, automatic combustion model to establish a hot stove, and achieved good results, to improve the quality of hot air played an important role.completed the stove automatic combustion system design, implementation of automated burning stove fuzzy control, and applied in practice. The results show that the design of the stove burner control performance is good.