20 ANDRITZINDUSTRY NEWS
Pulp Paper & Logistics
Canfor Pulp is the largest producer of market NBSK pulp in North America and is the leading producer of bleached, high performance kraft paper. It owns and operates three mills in Prince George, British Columbia. The Intercontinental Mill shown here is the site of the first installation of the Mult-E-Nip press upgrade.
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designs that can result in poor washing efficiency and limited throughput,” he says. “Plugging in the tapered headboxes, plugging in the vat, low feed consistencies, poor wash distribution, and low discharge consistencies are all potential problems.” When he joined ANDRITZ, Hallas worked with an international team to design products which would improve the performance of existing presses. Following a months- long development programme, including collaboration with ANDRITZ’s Todd Grace (vice president, product management) in the US and Pekka Tervola (R&D engineer) in Finland, they were
May/June 2015
ready to present their innovative upgrade solution to mills looking for better washing efficiency and/ or capacity increases. The timing was excellent
because Canfor was ready. “ANDRITZ came to us with their idea – keeping the low consistency, but really make a big improvement,” Parfitt says. “Every time we presented the concept internally, people got excited about it. They could see how it would fit our operation, giving us all the benefits for a reasonable cost.” In the case of Canfor, Hallas had an advantage. He was at the mill for the original start- up of the two Sunds DPA-1255 units. “Some of the people that I
worked with then are still here,” he says. “I have earned some credibility with them.”
The Mult-E-Nip upgrade is born When Hallas first presented his ideas, the upgrade product did not have a name. In fact, there were only conceptual sketches to explain the concept. “The actual design changed some since the original sketches improving during each discussion between customers and our global design team,” Hallas says. The original proposal called
for a feed distribution screw. Concerns were raised by Canfor about adding more moving equipment to an existing press
during the upgrade, which would also increase energy consumption and might cause plugging issues. “Listening to those concerns, we simplified the design so there was no moving equipment,” Hallas says. “We would not have to upgrade the auxiliaries and could bolt to the existing vat.” With the design solidified,
the product was given a name: Mult-E-Nip upgrade. The ‘Mult-E’ stands for multiple wash zones and multiple nips. The ‘E’ also stands for E10 improvement and washing efficiency.
It is a unique solution for low-
consistency (2.5 to 6 per cent) applications and the technology can be applied to medium-
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