A method for estimating disturbances and giving recommendations for improving process performance
AssigneeKemira Oyj
InventorsIiris JOENSUU, Marjatta PlIRONEN, Torsten HAVERINEN-NIELSEN, Vesa-Matti TIKKALA
Life of this patent
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Abstract
The invention provides a method for estimating disturbances and giving recommendations for process performance of a water intensive industrial process. The method takes into account a huge number of process variables.
Claims18
A method for estimating disturbances and giving recommendations for process performance of a water intensive industrial process having steps for
- measuring variables of the process and collecting process data, and
- pre-processing measurement and process data of the measuring and collecting step,
- wherein the method comprises steps for estimating disturbances, and forming recommendations,
- for each disturbance estimation of a parameter of the process the step of estimating the disturbances comprising the sub steps for receiving the pre-processed measurement and process data from a pre-selected group of the variables of the process,
- normalizing the received pre-processed measurement and process data,
- operating the normalized data, and
- scaling the operated normalized data, an output of the scaling step being the disturbance estimation of the parameter of the process,
- for each recommendation forming the step of forming the recommendations comprises sub steps for receiving the disturbance estimations from a pre-selected group of the outputs of the scaling step,
- mapping each received disturbance estimation to one of status categories, and forming each recommendation utilizing the mapped disturbance estimations.
An arrangement to estimate disturbances and to give recommendations in order to improve process performance, the arrangement having measurement devices and receiving interfaces to measure variables of a process, and receive process data, and a pre-processing arrangement to pre-process measurement and process data from the measuring devices and the receiving interfaces, wherein the arrangement further comprises:
- a first unit to estimate disturbances, and a second unit to form recommendations, which first unit, in order to estimate the disturbances for each disturbance estimation of a parameter of the process, is arranged to receive the pre-processed process and measuring data from a pre-selected group of the variables of the process, normalize the received pre-processed measuring data, operate the normalized data, and scale the operated normalized data, an output of the scaling being the disturbance estimation of the parameter of the process,
- wherein second unit, for each recommendation forming, is arranged to receive the disturbance estimations from a pre-selected group of the outputs of the first unit, map each received disturbance estimation to one of status categories, and form each recommendation utilizing the mapped disturbance estimations.
Dependencies are inferred from the claim text.