Pulp Paper & Logistics
ANDRIT 19Z
screen. In the fine screening sector, a new ModuScreen A44 was planned as the first stage, while existing screens would be used in the second, third, and fourth screening stages – stage three preceded by an HD-cleaner from the existing equipment. All screens were also to receive new screen baskets and rotors from Andritz.
The turnkey supply agreed with Andritz included detailed engineering, all drive motors, complete instrumentation, piping and supports required for the rebuild, electrical installation work including adjustments to the DCS and MCC, complete installation work (mechanical, electrical, pipework, and machinery), as well as start-up with trial operation and training. “Leipa ordered an all-round package with Andritz as general
contractor,” Andritz project manager Markus Mairitsch explains.
Mission accomplished Start-up was at the beginning of October 2014 and the result was impressive. The agreed reduction in weight losses to a maximum of 7 kg/min otro was achieved quickly, as was the guaranteed capacity and the increase in capture rate for stickies. The new ModuScreen T4C
screen from Andritz played a central role in the rebuild of the preliminary screening plant. This special, two-stage tailing screen operates with centripetal force in the lower area with a rotating screen basket perforation diameter of 2.0 mm and with centrifugal force in the top section under atmospheric pressure with a screen basket
“This optimisation demonstrated that changes to individual units or sub-systems influence the ecological footprint of the entire company,” says Sebastian Stockfisch, head of deinking and effluent treatment at Leipa
hole diameter of 2.2 mm. It is not sensitive to spinning and keeps the fibre content in the reject to
a minimum. With good screening efficiency, the reject leaves the screen with a high dryness of
4 September/October 2018
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