Washing control system and method for coal feeder

Abstract

The invention discloses a washing control system for a coal feeder. The washing control system is used in a conveyor belt for the coal feeder and comprises a coal feeder metering subsystem, a frequency conversion subsystem, a sorting subsystem and a programmable controller, the signal output end of the coal feeder metering subsystem is connected with the signal input end of the programmable controller, the programmable controller controls the frequency converter through the frequency conversion subsystem to adjust the operation frequency of the coal feeder and sort coal in the conveying belt,and the signal output end of the sorting subsystem is in communication connection with the signal input end of the coal feeder metering subsystem so as to input feedback information in the sorting subsystem to control the coal feeder to set the coal feeding amount to form a closed-loop control. By the adoption of the washing control system, the coal preparation ratio is accurately controlled, thequality of coal subjected to preparation washing is stabilized, and stable raw coal quality is provided for subsequent washing processing.

Description

technical field [0001] The invention belongs to the field of coal mine production, and more specifically, the invention relates to a washing control system and method for a coal feeder. Background technique [0002] At present, in the coal mine production process, when the coal mine is mixed and washed, the coal feeder operating frequency is set by the frequency converter to adjust the coal output of the coal feeder. This control method has the following problems: First, the coal output is affected by the The amount of storage, the smoothness of feeding, and the operating conditions of the coal feeder are affected by many factors; the second is that the coal output cannot be accurately measured, and the precise proportioning cannot be achieved; the third is that the automatic closed-loop control cannot be realized, and the frequency requires manual labor. Adjustment, the interference of human factors is large; not only that, the electronic belt scale used in the prior art is...

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Problems solved by technology

[0002] At present, in the coal mine production process, when the coal mine is mixed and washed, the coal feeder operating frequency is set by the frequency converter to adjust the coal output of the coal feeder. This control method has the following problems: First, the coal output is affected by the The amount of storage, the smoothness of feeding, and the operating conditions of the coal feeder are affected by many factors; the second is that the coal output cannot be accurately measured, and the precise proportioning cannot be achieved; the third is that the automatic closed-loop control cannot be realized, and the frequency requires manual labor. Adjustment, the interference of human factors is large; not only that, the electronic belt scale used in the prior art is still an open-loop control in the selection and washing process controlled by the frequency converter, that is, washing is carried out through multiple conveyor belts, so this matching This method not only increases the production cost, but also the matching accuracy is not high, which affects the matching efficiency, and it is difficult to guarantee the quality of the finished product

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