Pulp Paper & Logistics


HEIMBACH 19


Right: the CD moisture profile before the reel along with (above, and above right) the digital image and thermograph showing moisture at the edge


paper sheet would be too hot to allow differentiated measurement and temperature differences could therefore no longer be localised. On site only the moisture bar had to be switched off. The TASK experts took the first pictures at the reel. It is here that experience tells uneven moisture is of the greatest interest to customers as it actually goes on


sale or is further processed. Then it went towards the press section, frame by frame.


Finding a solution through a process of elimination During the evaluation, it was found that the wet edge was clearly visible on recordings made at the reel. This then led like a red thread through to the first


drying group. It was therefore clear that the fault was no longer in the dryers but in the press section. That is why a nip profile measurement was immediately ordered after the thermographic work. And the result was that some pressure pistons in the drive side edge area of the shoe were not working as required. The pressure required for effective


dewatering was insufficient here. The conclusion therefore is


that due to the thermographic measurement, the dryer section could be excluded as a possible cause of the problem, and a further measurement from TASK quickly and successfully localised the problem so that production was able to run at an optimum level.


Digital image (above) of the 1st dryer group, the measurements (above centre) and the thermograph


Digital image (above) of the 8th dryer group along with the moisture measurements and the thermograph September/October 2020


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