Control method and device for pulverizing system

Abstract

The invention discloses a control method and device for a pulverizing system. The method comprises the steps that the current operation mode of a coal mill is determined according to the opening number of exit doors; an allowable switching mode of the coal mill is determined according to the current operation mode and the allowable change value and the allowable minimum value of the opening number; if a switching instruction for a target switching mode is detected, the target switching mode belongs to the allowable switching mode, and the coal mill meets a target allowable condition corresponding to the target switching mode, the coal mill is switched from the current operation mode to the target operation mode corresponding to the target switching mode; and by changing the opening number of the exit doors of the coal mill and changing the operation mode of the coal mill, the pulverized coal concentration of remaining pulverized coal pipes can be improved on the basis of closing different numbers of exit doors of the coal mill, and therefore the coal quantity control flexibility of the pulverizing system in the deep peak regulation period is improved on the basis that the safety of a unit is guaranteed.

Description

technical field [0001] The present application relates to the technical field of thermal power plants, and more specifically, to a control method and device for a pulverizing system. Background technique [0002] With the clean reform of the energy structure, the installed capacity of new energy power stations such as wind power and photovoltaics has grown rapidly. However, new energy has the characteristics of randomness, intermittent, and instability. Cause adverse effects, resulting in a more serious phenomenon of abandoning wind and light. In response to the problem of new energy consumption, the National Energy Administration proposed to fully tap the peak-shaving capacity of the existing system to enhance the flexibility and adaptability of the system. Power grids in various regions have issued operating rules for the power peak shaving auxiliary service market, formulated relevant peak shaving subsidy policies, and guided coal-fired thermal power units to improve ope...

AI Technical Summary

Problems solved by technology

[0005] The invention provides a control method of a pulverizing system, which is used to solve the technical problem in the prior art that the boiler combustion stability is poor due to too low coal volume during deep peak regulation. The method is applied to coal feeders and coal mills In the pulverizing system, the coal mill includes a plurality of pulverized pipes for conveying pulverized coal to the boiler burner, and each pulverized pipe is provided with an outlet door to control the on-off of the pulverized pipe. The method includes :

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