Modeling and estimation of the blast furnace stack

摘要

A simulation model for the stack region of a blast furnace has been developed. The objective of the work has been to obtain a model that can be applied on-line to the actual process. The transient behaviour of the particular process units in question make great demands upon the model. The oscillation of the state of the reactor is one of them since no 'steady state' operational data may be obtained. On the contrary, the transient responses of the process include very much information. From the state of the gas at the lower boundary of the dry part no measurement is provided by sensing devices. The model must therefore generate estimates of the state of the gas. The estimation procedure included in the model is therefore not only a tool to obtain an improved performance, but a direct necessity. Luckily, the oscillations are very regular and can thus be included in the structure of the estimator. The main application of the model is to function as an intelligent measurement device providing the operators and process developers with useful information