19.1.2019
Picture title : ACA Systems' ACA Permi porosity sensor
which provides online air permeability measurements and
acts as early warning system for unwanted process changes
ABB has entered into a partnership with ACA Systems,
the leading supplier of porosity sensors, to offer paper mill customers a proven technology that stabilizes the process to enable excellent roll quality when measuring online porosity. The single point ACA Permi sensor uses a continuous air flow method that is 50 to 100 times faster than other systems available on the market to reduce air permeance variations, enabling better product quality, optimized energy usage and reduced raw material costs.
The multiple advanced calibration features
improve the accuracy of the measurements while also enabling faster grade changes, improving overall runnability. This accuracy means that the level of fines can be better controlled while monitoring the direct effect of refining, retention, broke addition and vacuum levels.
When stabilized air permeability
is at the desired level, the roll is considered highest quality. In contrast to laboratory measurements that take 5 to 10 points from the produced roll, ACA Permi measures more than 10,000 points in real time and makes a sophisticated, statistical analysis on the quality of the roll.
The sensor offers a wide measurement range
that usually requires one single calibration, so there is typically no need to change parameters or physical parts for various grades. Plus, the automatic cleaning cycle and smart construction make for easy maintenance and installation. The measurement signal is also compatible with all mill-wide systems and cloud services.
ACA Permi’s unique measurement head design,
tailored with special coatings for challenging applications such as decor paper, provides excellent contact with the web and eliminates the leakage of air, dust and other disturbances. Both vacuum and air blow methods are available, resulting in a very high correlation between the ACA Permi and any lab standard. The sensor suits a wide range of paper grades, including sack paper, MG-kraft paper, cigarette paper, security paper, decor paper, photo base paper, thermal paper, carbonless paper, saturating paper and base paper before coating.
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