Waggeryd Cell first to put in CrillEye
The first mill installation of CrillEye, developed in cooperation between PulpEye and the Swedish research institute Innventia, is running at Waggeryd Cell in Sweden.
Waggeryd Cell is a privately owned producer of bleached softwood CTMP with an annual capacity of 175,000 tonnes. The production line has three-stage refining, peroxide bleaching and ends with a flash dryer.
The crill measurement is based on comparison of two optically measured surface areas (light absorption). The total area of fibres and crill is measured with UV. The total area of fibres only is measured with IR. The “crill variable”, KFP, is a concentration independent ratio, obtained when the fibre+crill area (UV) is divided by the fibre only area (IR). No image analysis is required, making the measurements extremely fast.
“We measure crill on all our pulp types and by combining crill data with fibre data, PulpEye provides us with the necessary strength properties online”, says Mikael Nylander, Mill Manager at Waggeryd Cell. “This gives us quicker grade change, which is important as we have a great number of qualities and each quality is unique to each customer.