Material level measuring device for steel ball coal mill and optimization and control method of powder-making process by bin type steel ball coal mill

Abstract

The invention discloses an optimized controlling method of the powder producing process of a middle-storage type steel ball coal mill, comprising two aspects: the noise of the coal mill is detected through a noise sensor for assisting coal dust humidity, coal dust temperature, coal dust fineness or a material level which can substitute signal for detecting coal mill thereof; an advanced controlling of a powder producing system is taken as a center for realizing the optimization of the controlling parameters and the controlling goals of a material level loop, an exit temperature loop and an air output loop, so as to realize the running safety evaluation and the malfunction diagnosis, to realize the running economic analysis and operation suggestions, thereby realizing the optimized runningof the powder producing system. The invention realizes the whole optimization to the powder producing system, is different from the prior controlling proposal or plan which only resolves part of the controlling of the powder producing system, at the same time adopts the advanced controlling for ensuring the continues, stable, safe and economic running of the powder producing system, and is extensively applied to the powder producing process of a middle-storage type steel ball coal mill.

Description

technical field [0001] The invention relates to the technical field of automatic control, in particular to a steel ball coal mill material level measuring device and an intermediate storage bin type steel ball mill coal pulverization process control method. Background technique [0002] The automatic control and optimal operation of the intermediate storage bin type steel ball mill coal pulverization system has always been a historical problem that plagues the production of power plants in our country. Its manifestations are: the material level (or coal storage) in the coal mill cannot be measured, so the automatic control of the coal supply cannot be realized; because the coal storage cannot be stabilized, it is difficult to control the outlet temperature and ventilation; the system cannot be obtained Therefore, the economical operation of the pulverizing system cannot be guaranteed; the steel ball gradation lacks a general theoretical basis, empirical formula and managemen...

AI Technical Summary

Problems solved by technology

Its manifestations are: the material level (or coal storage) in the coal mill cannot be measured, so the automatic control of the coal supply cannot be realized; because the coal storage cannot be stabilized, it is difficult to control the outlet temperature and ventilation; the system cannot be obtained Therefore, the economical operation of the pulverizing system cannot be guaranteed; the steel ball gradation lacks a general theoretical basis, empirical formula and management method, so that the steel balls are added blindly; there is no economic operation procedure for designing multiple coal mills, lead to uneconomical operation

Therefore, most of the intermediate storage bin type steel ball mill coal pulverization systems are still in the original state of human judgment and manual operation, and the operation intensity is high; coal blockage, over-temperature, and under-coal phenomenon occur from time to time, and even explosion accidents in the pulverization system occur; more The important thing is that the pulverizing system is a large power consumer in power plants, and the power consumption accounts for about 20%-25% of the power consumption of the plant. The optimal operation of the pulverizing system cannot be achieved by manual control methods, or local control and local optimization methods. There are defects such as large power consumption of the factory, poor economic benefits; large consumption of steel balls and liners, and large environmental noise pollution.

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