A control method and device for a pulverizing system

Abstract

The invention provides a pulverizing system control method and device which are applied to computer equipment. The method comprises the steps that the current output coal-type margin of each pulverizing system is calculated out according to the current output coal-type coal amount of each pulverizing system and the output coal amount upper limit; the designed coal-type coal amount of a unit is calculated according to the current output coal-type coal amount of the unit; the load upper limit of the unit is calculated according to the designed coal-type coal amount of the unit and the designed coal-type margin of the unit; the load margin of the unit is calculated according to the load upper limit and the current load of the unit; and the pulverizing systems for providing coal powder for theunit are reduced or newly arranged according to the current load and / or the load margin of the unit. By means of the pulverizing system control method, the automatic starting and stopping function ofthe pulverizing systems can be realized, and manual intervention is not needed in the process, so that the working efficiency of the pulverizing systems is improved, and the normal operation of the coal-fired unit is guaranteed.

Description

technical field [0001] This application relates to the field of automatic control of coal-fired power plants, in particular, to a method and device for controlling a pulverizing system. Background technique [0002] At present, thermal power generation is one of the main ways of power supply, and the automation level of thermal power units is constantly improving. Among them, the coordinated control ability of large coal-fired units and the automatic adjustment level of important setting parameters have reached a relatively high level. However, in terms of realizing the function of APS (Automatic Power Plant Startup And Shutdown System, unit self-starting and stopping control system), even if the coal-fired unit can meet the operating conditions, it will only end when the unit enters the initial load stage, and the full operation of the unit cannot be realized. The APS is running. The reason is that the pulverizing system (including coal feeder and coal mill) is an importa...

AI Technical Summary

Problems solved by technology

However, in terms of realizing the function of APS (Automatic Power Plant Startup And Shutdown System, unit self-starting and stopping control system), even if the coal-fired unit can meet the operating conditions, it will only end when the unit enters the initial load stage, and the full operation of the unit cannot be realized. APS running

The reason is that the pulverizing system (including coal feeder and coal mill) is an important auxiliary machine in the coal-fired unit. Mistaken start / stop of the pulverizing system will not only easily cause damage to the equipment, but also lead to fluctuations in the load of the unit. The stable operation of the unit brings hidden dangers

At present, in order to prevent the false start / stop of the pulverizing system, it is still necessary to rely on the experience of the operator to judge, and it is impossible to realize the APS operation under all working conditions

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