DEVICE FOR THE OPERATION OF A PLANT FOR THE PRODUCTION OF DEINKT ZELLSTOFF WITH CONDITION ANALYZERS FOR THE WASTE PAPER SUSPENSION BUILT IN THE FORM OF NEURAL NETS

摘要

PCT No. PCT/EP94/02954 Sec. 371 Date Mar. 19, 1996 Sec. 102(e) Date Mar. 19, 1996 PCT Filed Sep. 5, 1994 PCT Pub. No. WO95/08019 PCT Pub. Date Mar. 23, 1995Apparatus for the operation of a plant for producing deinked pulp with state analysers constructed in the form of neural networks for the waste paper suspension. At least one measuring device (ME) records spectral and/or physical characteristic values (IMf, Mp) of a waste paper suspension (PS). Furthermore, there are closed-loop or open-loop control devices (RS1 . . . RS8) for operating means of a waste paper preparation (AAA) in the plant. According to the invention, there is at least one state analyser (ZA), configured in the form of a neural network (NNg) or a plurality of parallel neural networks (NN1 . . . NN4), for the waste paper suspension (PS). This analyser forms from the characteristic values (IMf, Mp) controlled variables (ST: AB, AZ, FL, AA, AS, AT) for process control of the closed-loop or open-loop control devices (RS1 . . . RS8) of operating means at least of the waste paper preparation (AAA). As controlled variables, the ratio of white to coloured papers (AB), the ratio of illustrated-magazine paper to newsprint paper (AZ), the average fibre length (FL), the ash content (AA), the content of dirt (AS) and/or the content of adhesive contaminants (AT) in the waste paper suspension (PS) are suitable with preference.