DCS-based dense medium ash content control method and system for coal preparation plant

Abstract

The embodiment of the invention discloses a coal preparation plant dense medium ash content control method and system based on a DCS, and the method comprises the steps that the DCS obtains set coal preparation parameters needed by coal preparation, the set coal preparation parameters are input into a trained coal quality recognition model, and predicted separation density and ash content-density adaptive factors of coal preparation are obtained; the DCS collects online data of the ash meter and determines an ash content soft measurement value according to the online data of the ash meter; the DCS determines a correction value according to the ash content soft measurement value and the ash content-density adaptive factor, and adjusts the predicted sorting density according to the correction value; and the DCS controls the ash content of the dense medium clean coal according to the corrected predicted separation density. According to the coal preparation plant dense medium ash content control method and system based on the DCS disclosed by the embodiment of the invention, dense medium density adjustment and ash content control of the coal preparation plant can be realized.

Description

technical field [0001] The present invention relates to but is not limited to coal preparation control technology, in particular to a DCS-based heavy medium ash control method and system for coal preparation plants. Background technique [0002] Most coal preparation plants use dense medium coal preparation technology, and the quality of its process control has a great impact on the economic benefits of coal preparation plants. The key control parameter of the gravity separation process is the refined ash content, and the control method is to adjust the separation density of the dense medium cyclone. [0003] The measurement of heavy and refined ash content is generally obtained by the quality meter workshop regularly sampling during the production process, and using the fast ash experiment in the laboratory. The sorting density is obtained by the floating and settling test of the raw coal, and then the raw coal selectivity curve (H-R) is drawn, and then the sorting density...

AI Technical Summary

Problems solved by technology

[0005] At present, the existing dense medium density control system generally uses control algorithms such as PID to adjust the dense medium suspension density. When the coal quality changes greatly, the control system cannot make adaptive changes and cannot achieve good density medium ash content. adjust

Images