24 ANDRITZ
Pulp Paper & Logistics
which equates to a barrel-of-oil savings of €3,400 per day.
While conventional presses typically achieve an annual average of 40 per cent dry solids, the HQ- Press with its unique two-stage pressing is able to deliver an annual average of 45 per cent dry solids in normal operation
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this is not a high-risk area for us. We will have four units, which gives us one in reserve. If there are problems, Andritz will make it right. So, to my mind, we have very good upside potential.”
Tested and re-tested In August and September of 2016, the Metsä Fibre project team witnessed testing of the new HQ-Press at the manufacturing workshop in Finland. Merikallio was there. “This is an impressive unit, a very substantial heavy-duty design. The dry solids output was higher than we typically achieve. If we can get a couple of percentage points higher dryness for the same energy input – without the maintenance headaches – we will be very happy indeed.” The design of the HQ-Press
features a self-orienting drum with two-stage pressing to achieve the higher dryness. In practice, this two-stage operation allows a mill to maximise for either capacity or for dryness – or optimise for both – depending on current needs.
September/October 2017 Andritz’s own extensive testing
shows the HQ-Press can deliver about 5 per cent unit higher dry solids content than any comparable press. The annual average (summer and winter bark
combined) is about 45 per cent dry solids, while conventional presses reach about 40 per cent annual average. This can increase the net green energy value of the bark by about 12.5 per cent,
Benefits at a glance The HQ-Press has an open, simple design. The components are easily accessible for maintenance. The open design also reduces odours and mould spores in the operating environment. It runs an automated washing sequence. The slow-speed drum rotation and the applied materials extend the drum life significantly. With the slower rotational speed, larger-diameter drums, and larger-diameter infeed and outfeed screws, the HQ-Press is a noticeably more robust piece of equipment for bark handling in any wood yard or biomass handling operation. More information from Andritz
Oy, Askonkatu 9G, FI-15100 Lahti, Finland. Tel: 358 (0)20 450 5555. Email: woodprocessing@andritz. com
Unlike competitive units with enclosed structures, the HQ-Press has an open, simple design. The components are easily accessible for maintenance. As a side benefit, the open design helps with housekeeping activities, which reduces odours and mould spores in the operating environment
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