Blast furnace smelting expert system built based on pattern recognition technology and method thereof

Abstract

The invention discloses a blast furnace smelting expert system built based on a pattern recognition technology, which comprises a server, an operator workstation, six sets of PLCs (programmable logic controllers) (respectively used for material preparation below grooves, material distribution at the top of a blast furnace, water granulated slag control, dust removal control, coal powder injection control and water system control), a distributed control system, an IPC (industrial personal computer) for communication, a state classification module, a state diagnosis module, a state evaluation module, a state adjusting module and a state display module, wherein the server is provided with a database, the state classification module, the state diagnosis module, the state evaluation module and the state adjusting module are arranged in the server with the database, and the state display module is arranged in the operator workstation. Meanwhile, the invention also discloses a method for building a blast furnace smelting expert system based on a pattern recognition technology, which comprises the following steps of data access, state classification, state diagnosis, state evaluation, state adjustment, state display and execution. The system and method disclosed by the invention have the characteristics of standard and objective evaluation, good integrated performance, rich knowledge base and real-time updating, and can be widely applied to the technical field of blast furnace process control.

Description

technical field [0001] The invention relates to the technical field of blast furnace process control, in particular to a blast furnace smelting expert system based on pattern recognition technology and a method thereof. Background technique [0002] The blast furnace is a multi-variable, large-lag, nonlinear high-temperature chemical reactor with a huge volume, and the internal volume of a large blast furnace is 1000-5800m 3 It is so big that it is a giant. The inside of the blast furnace is filled with high-temperature, high-pressure CO-rich gas, and the gas generation rate of the blast furnace is as high as 4000-10000m per minute. 3 / min, due to many factors affecting the blast furnace, compared with other equipment in the iron and steel industry, such as converters, continuous casting, refining, steel rolling and other processes, the automation level of blast furnaces is the worst, and blast furnace operations are mainly completed manually. It takes 3-5 years for a blast...

AI Technical Summary

Problems solved by technology

[0014] Over the years, many problems have been encountered in the development of blast furnace smelting expert systems at home and abroad, such as low learning and maintenance capabilities of the system, monotonous reasoning mechanism, simplification of explanation mechanism, simplification of operation guidance, lack of distribution and coordination among subsystems However, by comparing the development of these expert systems at home and abroad, it can be found that the above problems are all related to one problem, that is, the blast furnace expert system. Core—the knowledge base is too simple, and the knowledge base cannot adapt to changes in the status of the blast furnace, and cannot be updated in real time according to the status of the blast furnace

At the same time, the existing knowledge bases of these expert systems are directly accumulated from the experience of blast furnace operators. These experiences are highly subjective and often need to be improved with the operation of the blast furnace process. On the one hand, blast furnace operating experience Obtaining is difficult. On the other hand, the benevolent sees benevolence and the wise see wisdom. Sometimes it is difficult for different experts to reach a common opinion on the same issue, which brings great difficulties to the maintenance of the expert system.

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