The invention relates to a three-dimensional unstable state monitoring and abnormity diagnosis and
maintenance system of a
blast furnace hearth, belonging to the technical field of online monitoring, diagnosis, prewarning and maintenance of the
blast furnace. The three-dimensional unstable state monitoring and abnormity diagnosis and
maintenance system of the
blast furnace hearth comprises a
data acquisition module, a
data filtering module, a
hearth and furnace bottom
corrosion and accretion calculation module, an
abnormality diagnosis module, a prewarning displaying module and a hearth-guiding and maintaining module.
Water temperature of a cooling wall of the hearth and galvanic couple temperature of a furnace body can be collected and filtered in real time; by combining the two data together and using pro and con questions of the
heat transmission science in combination with the standard of abnormity diagnosis, the influence of the abnormity possibly occurring in the production of the
thermal conductivity coefficient variation of refractories, the ring shake, the air gap, and the like on distribution and
corrosion of a temperature field is comprehensively judged, a gradient-regularization method and a
chaos optimization method are combined to solve, the online monitoring on the three-dimensional unstable state temperature field of the hearth and the furnace bottom, the internal
corrosion type, the
slag-
metal skull variation and the hot state of the hearth is realized, the abnormal circumstance and the corrosion deterioration causes are diagnosed in real time, and the hearth maintenance means is pertinently guided according to the corrosion deterioration causes. The
system is successfully applied to industry.