The invention provides a
clean coal ash content control method and
system in a dense medium
separation process. The method comprises the following steps: collecting historical data in the dense medium
separation process; preprocessing the data; constructing and training a state
estimation model and a
system dynamic model; and performing real-
time control on the ash content of the
clean coal based on the constructed state
estimation model and the
system dynamic model. According to the method, the modeling problem of the large time-
lag characteristic in the dense medium
separation process is effectively solved, the influence of the feeding pressure on the
clean coal ash content is comprehensively considered, the model can more accurately learn the bottom layer physical characteristics in the dense medium separation process, proper control actions can be adopted in time to compensate the influence of external interference factors, the response speed is high, and the real-time performance is high. The method has strong anti-interference capability and is insensitive to
noise of ash content measurement. When the scheme is applied to production, the quality of a
coal product can be improved by accurately controlling the ash content of the clean
coal; and
automatic control can be fully achieved, the labor intensity of operators is relieved, and the production efficiency is improved.