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公开(公告)号：EP1520215B1
公开(公告)日：2007-09-26
申请号：EP03736394.2
申请日：2003-06-12
申请人： ABB AB
CPC分类号： D21G9/0018 , G05B13/048
摘要： A process is modeled by a dynamic model, handling time dependent relations between manipulated variables of different process sections (10A-D) and measured process output variables. Suggested input trajectories for manipulated variables for a subsequent time period are obtained by optimizing an objective function over a prediction time period, under constraints imposed by the dynamic process model and/or preferably a production plan for the same period. The objective function comprises relations involving predictions of controlled process output variables as a function of time using the process model, based on the present measurements, preferably by a state estimation procedure. By the use of a prediction horizon, also planned future operational changes can be prepared for, reducing any induced fluctuations. In pulp and paper processes, process output variables associated with chemical additives can be used, adapting the optimization to handle chemical additives aspects.
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公开(公告)号：EP1520215A1
公开(公告)日：2005-04-06
申请号：EP03736394.2
申请日：2003-06-12
申请人： ABB AB
CPC分类号： D21G9/0018 , G05B13/048
摘要： A process is modeled by a dynamic model, handling time dependent relations between manipulated variables of different process sections (10A-D) and measured process output variables. Suggested input trajectories for manipulated variables for a subsequent time period are obtained by optimizing an objective function over a prediction time period, under constraints imposed by the dynamic process model and/or preferably a production plan for the same period. The objective function comprises relations involving predictions of controlled process output variables as a function of time using the process model, based on the present measurements, preferably by a state estimation procedure. By the use of a prediction horizon, also planned future operational changes can be prepared for, reducing any induced fluctuations. In pulp and paper processes, process output variables associated with chemical additives can be used, adapting the optimization to handle chemical additives aspects.
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3.发明授权METHOD FOR CONTROLLING A PROCESS FOR BURNING A LIME CONTAINING MIXTURE TO BURNT LIME 有权一种用于控制程序对混合物中以白垩石灰煅烧
公开(公告)号：EP2449329B1
公开(公告)日：2014-12-03
申请号：EP09780120.3
申请日：2009-07-03
申请人： ABB AB
发明人： LEDUNG, Lars , DAHLQVIST, Erik
CPC分类号： C04B2/10 , F27B7/42 , F27D19/00 , F27D21/0021 , C04B7/361 , C04B7/4492
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4.发明公开METHOD AND DEVICE FOR CONTROLLING A PROCESS FOR BURNING A LIME CONTAINING MIXTURE TO BURNT LIME 有权一种用于控制程序对混合物中以白垩石灰煅烧
公开(公告)号：EP2449329A1
公开(公告)日：2012-05-09
申请号：EP09780120.3
申请日：2009-07-03
申请人： ABB AB
发明人： LEDUNG, Lars , DAHLQVIST, Erik
CPC分类号： C04B2/10 , F27B7/42 , F27D19/00 , F27D21/0021 , C04B7/361 , C04B7/4492
摘要： A method and a device (1 ) for controlling a process for burning lime containing mixture (CaCO
3 ) and converting it to calcinated lime (CaO) in a rotary kiln (2), said rotary kiln (2) having an elongated cavity (3) surrounded by a wall (4) and a burner (5) arranged to heat the cavity (3). The method comprises collecting measurement data of the temperature in the wall (4) at a plurality of measuring points along the longitudinal axis (20) of said cavity (3), predicting the actual temperature gradient along the longitudinal axis (20) of said cavity (3) based at least on said measurement data of the temperature in the wall (4), and by means of a thermal model describing the temperature along the cavity (3) of the kiln (2), determining a desired temperature gradient along the cavity (3) based on the predicted temperature gradient along the cavity (3) and a predetermined control strategy controlling the temperature in the kiln (2) so that the area of deposition of lime on the inside of the walls (4) of the kiln (2) is controlled and the drawbacks of the lime deposition is reduced.
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