Full-automatic intelligent vibration reduction control method and device for ball milling system of large smelting blast furnace coal mill

Abstract

The invention provides a full-automatic intelligent vibration reduction control method and device for a ball milling system of a large smelting blast furnace coal mill. The full-automatic intelligent vibration reduction control method comprises a raw coal autonomous recognition algorithm and a corresponding rotating speed control method. A plurality of pieces of characteristic data are collected through a multi-dimensional sensor, common raw coal semi-coke types, blocky gangue-containing coal and raw coal feeding errors are recognized and classified through a KNN regression algorithm, an AHP and a PID control algorithm are combined according to different working conditions, the full-automatic intelligent vibration reduction control method and device for the ball milling system are researched and developed, full-automatic real-time adjustment of the rotating speed of a lower grinding ring of the coal mill is achieved, short-time violent vibration of the ball milling system is remarkably relieved or basically eliminated, noise outside the mill is reduced, the powder outlet amount of the coal mill is increased, the maintenance frequency of a transmission chain is reduced, the adaptability to raw coal varieties is improved, and a condition is created for autonomous integrated control of a coal pulverizing system taking the coal mill as a main part.

Description

Technical field: [0001] The invention belongs to the technical field of intelligent control of heavy machinery, and in particular relates to a fully automatic intelligent vibration reduction control method and device for a large-scale smelting blast furnace coal mill ball mill system. Background technique: [0002] In recent years, compared with domestic similar products, EM type smelting blast furnace coal mill has the advantages of high production capacity and high efficiency, and has been more and more widely used in the field of blast furnace coal injection, but it still has certain advantages compared with international advanced technology. Among them, the short-term strong vibration problem of the ball mill system of the coal mill has a great impact on the pulverization efficiency, service life, maintenance frequency and environmental noise of the whole machine, and has become one of the bottleneck technologies, which has not yet been resolved. [0003] The reason: ...

AI Technical Summary

Problems solved by technology

When the massive hard coal randomly enters or accumulates in the lower grinding ring, strong system vibration will occur, which will cause excessive force on the bearings and gears in the reduction box, resulting in sticking dry friction or pitting wear, and the lubrication state will deteriorate, which will lead to production efficiency. Damaged and drive chain maintenance frequency increases, repeated grinding occurs many times, and the passage of finished coal powder to the screen is blocked, which has a great impact on the coal production and service life of the coal mill

[0006] 3. The large tolerance caused by the large conveying volume of the feeder also has a certain impact

At present, the domestic large-scale blast furnace smelting blast furnace coal mill ball mill system generally adopts the constant speed method. The traditional manual and semi-automatic speed control schemes lack rapidity and accuracy, and are not enough to deal with complex coal grinding conditions.

Images