International technology Group ANDRITZ has successfully completed the rebuild of a sludge screw press at Stora Enso’s Anjala paper mill in Anjalankoski, Finland.
The turnkey upgrade of the sludge screw press, which has been out of operation for the past few years, included dismantling of the baskets and shaft, rebuild of the baskets with new screen plates, overhaul of the counter-pressure unit, supply of all parts needed for the overhaul, as well as erection of the unit. The upgraded press replaced an existing, outdated sludge dewatering unit.
Sludge screw press at Stora Enso’s Anjala mill after upgrade by ANDRITZ “Photo: ANDRITZ”.
Prior to award of the order, intensive laboratory sludge tests were conducted by ANDRITZ in order to check the suitability of the screw press for the dewatering capacity needed and the sludge to be processed.
Stora Enso is a leading provider of renewable solutions in packaging, biomaterials, wooden structures, and paper on global markets. The group has some 26,000 employees in more than 35 countries. Anjala Mill belongs to Stora Enso’s Paper division and is one of Europe’s largest producers of book paper.
The ANDRITZ GROUP
ANDRITZ is a globally leading supplier of plants, equipment, and services for hydropower stations, the pulp and paper industry, the metalworking and steel industries, and for solid/liquid separation in the municipal and industrial sectors. The publicly listed technology Group is headquartered in Graz, Austria, and has a staff of approximately 25,500 employees. ANDRITZ operates over 250 sites worldwide.
ANDRITZ PULP & PAPER
ANDRITZ PULP & PAPER is a leading global supplier of equipment, systems, and services for the production and processing of all types of pulp, paper, tissue, and cardboard. The technologies cover the processing of logs, annual fibers, and waste paper; the production of chemical pulp, mechanical pulp, and recycled fibers; the recovery and reuse of chemicals; the preparation of paper machine furnish; the production of paper, tissue, and cardboard; the calendering and coating of paper; as well as treatment of reject materials and sludge. The service range includes modernization, rebuilds, spare and wear parts, service and maintenance, as well as machine transfer and second-hand equipment. Biomass, steam, and recovery boilers, as well as gasification plants for power generation, flue gas cleaning plants, plants for the production of nonwovens, dissolving pulp, and panelboards (MDF), as well as recycling plants are also allocated to the business area.