Monitoring, prediction and alarm system for blast furnace hearth and bottom

Abstract

A monitoring, forecasting and alarm system of the bottom and hearth of a blast furnace belongs to the longevity technical field of blast furnaces. The system comprises online monitoring and forecasting hardware and software processing modules; the online monitoring and forecasting hardware consists of a thermocouple and a cooling system which are laid at the furnace hearth and the furnace bottom,and a database of the blast furnace production process is connected by the Ethernet; the software processing modules comprise a data acquisition module, a data validity judgment module, a temperaturefield computation module, an improved genetic algorithm module, a B-P neural network module, a database, an isotherm, an erosion and thickening image display module, a 3D imaging module, a heat flow monitoring and alarm module and a historical data query module; and the software processing modules are operated on an industrial control computer. The monitoring, forecasting and alarm system has theadvantages of low investment, reliability and visualization. The system provides an objective and quantized basis for the erosion and thickening erosion condition of the furnace hearth and the furnace bottom in the blast furnace ironmaking process, and helps a blast furnace operator timely know the condition of the furnace hearth and the furnace bottom and take effective furnace protection measures so as to prolong the service life of the blast furnace.

Description

technical field [0001] The invention belongs to the technical field of blast furnace longevity, and in particular provides a blast furnace hearth bottom monitoring, forecasting and alarming system. Based on heat transfer, numerical calculation method, BP neural network and genetic algorithm, the method of fully automatic monitoring and forecasting of hearth bottom erosion and thickening and the computer monitoring and forecasting system are applicable to the blast furnace hearth bottom erosion and thickening conditions Monitoring, forecasting and alarming of heat flow changes. Background technique [0002] At present, there are two main types of hearth monitoring: temperature monitoring and heat flow monitoring. Temperature monitoring usually uses thermocouples to collect temperature data online. Because of its simplicity and convenience, it is used in most blast furnaces; heat flow monitoring is to measure the temperature rise and flow rate of cooling water flowing through...

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Problems solved by technology

[0009] The above models include a simple steady-state model in the Cartesian coordinate system, which has a fast convergence speed and a simple program, but it is quite different from the actual situation; there are also two-dimensional steady-state models and unsteady-state models in the cylindrical coordinate system, but most They are all established with the idea of ​​"positive problem" of heat transfer, and less consideration is given to the process of changing erosion boundaries and the process of junction thickness generation, which is also a restrictive link in the development of some digital models.

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