The Pulp Drying Systems Division is the leading global supplier of complete sheet drying lines comprising screening, dewatering, drying, sheet cutting, and bale finishing systems. These systems are offered separately or as a completely integrated line for the production of market pulp. Capacities over 3,500 t/d with working widths up to 9.3 m in a single line are available.
The Division also supplies wet lap systems, flash dryers, and bale forming (slab press) equipment, as well as finishing lines. As part of its services, the Division also modernizes pulp drying lines to increase production, quality, and useful life.
The Division is headquartered in Graz, Austria and has locations in Canada and Sweden.
In order to better focus on customers needs, Pulp Drying Systems was newly organized as a Division within Paper Mill Technologies in 2004. The Division works in close cooperation with the other Divisions to meet customers’ requirements for drying and finishing pulp (mechanical, recycled, or chemical pulp) and uses synergies in sheet forming, dewatering, pressing, and drying with the Tissue Machines Division.
The world's largest high-speed cutter for a single-line pulp machine (9.3 m sheet width) was successfully started up at the Jiang Lin Pulp Mill in China. New systems for automated tail threading to the cutter/layboy were successfully started up at a mill of Mondi Paper in the Republic of South Africa and the Jiang Lin mill in China.
- The Pulp Drying Systems Division will contribute the Single-Line Drying Package (including Fläkt Dryer) to the multi-Division order from CMPC Celulosa S.A. in Chile. When completed, the plant will be among the largest in the world, rated at up to 2,560 t/d production and a working width of 9.23 m.
- The Division will supply the complete drying line for M-real’s new BCTMP mill to be built in Finland. This technology is the most efficient flash drying system available today.
- An upgrade to the world’s largest pulp drying line at a pulp mill in Hainan, China was ordered by the mill to increase production from 3,000 to 3,250 t/d.
- The Division will provide the flash drying and baling line for the greenfield chemi-mechanical market pulp mill of Estonian Cell to be built in Kunda, Estonia.
- A fiberboard plant drying system (Twin Wire technology) was sold to Pavatex AG in Switzerland.
Technology development in the Pulp Drying Division continues to focus on lowering the investment cost per ton of pulp produced. The main R&D thrust is to produce a single drying line with a production of 4,000 t/d (1,000,000 t/y) based upon the successful Twin Wire Former technology. In addition, development is underway to continually improve the machinery’s uptime through easy/fast sheet threading and process condition monitoring.
A highly sophisticated process simulator based on Andritz’s process simulation technology from IDEAS for the entire sheet drying line has been developed. This is used for operator training and DCS check-out prior to start-up. This simulation approach is proven to deliver fast production ramp-ups after the line is started. The simulator also contributes to continuous optimization of the plant.
Work is progressing on developing the Andritz slab press, which is an advanced development based on the successful Nilsen design acquired in 2004. The first commercial installation of this press will be at the Estonian Cell greenfield mill being built in Kunda, Estonia.
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