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Highest electrical efficiency from waste: Lahti Energia, Lahti Finland

Lahti Energy’s Kymijärvi II power plant, the world’s first eco-gas fueled power plant, was inaugurated in 2012. The power plant runs on SRF that is gasified, cooled and cleaned before combustion and produces 50 MW of electricity and 90 MW of district heat for the city of Lahti in Finland.

OptiConcept M –Setting new standards

Economy of total investment, personnel safety, easy machine usability and reduction of environmental load were the key targets guiding the development work of a group of experts responsible for new paper and board making concept, OptiConcept M.

Unique cooperation agreement with the Hallsta mill

A unique roll service agreement was signed at Holmen Paper’s Hallsta mill in Sweden on June 22, 2011. “We have exceptionally high expectations for this agreement – and I’m not just talking about the quality of roll grinding and improved maintenance,", says Daniel Peltonen, Technical Manager at Holmen Paper Hallsta.

Sizer roll cover lasted for 55 weeks

“The roll replacement cycle was far too short, so we needed covers that would better withstand wear and deformation. The potential performance offered by Valmet Sizer Roll Cover SH convinced us,” says Mill Service Manager Harri Siitonen.

Optimization of spare parts inventory – a cost-cutting tool

Paper mills often face a situation where the number of spare parts on hand gets enormous. Minor machinery upgrades or rebuilds have been carried out over the years and some new spare parts have been bought each time to ensure continuous operation.

Controlling your flotation process

Flotation is an important part of mineral processing in most mining operations, requiring an accurate, durable, and repeatable level control valve to manage level control in the column, cell, staged reactor, or direct reactor. The head pressure to the control valve from each type of flotation process makes sizing a critical function to ensure proper operation of the valve and performance of the solution. For instance, flotation cells have very low driving head pressure to the valve. Since the head pressure is so low, inlet velocities, outlet velocities, and any bends or elbows in the piping can affect this low head pressure. If all factors are not considered carefully in this case, the danger is mis-sizing the level control valve on the low side.

More efficient process management with modernization of automation

Helen Ltd has invested in the future of the Salmisaari power plant in Helsinki. The new automation system is part of the company’s projects to improve energy efficiency, increase usability and reduce emissions.

Asia’s largest biomass power plant operates with Valmet DNA

The Dangjin plant near Seoul in South Korea is the largest biomass power plant in Asia. It uses a mix of agricultural and associated by-products. The plant generates 105 MW electricity and the demanding process is run with Valmet’s latest technology, Valmet DNA.

Valmet DNA extends lifetime of paper machine controls at Stora Enso Nymölla

In May, Stora Enso Nymolla successfully started up its PM2 with up-to-date control technology. Valmet’s delivery comprised Machine Control PLC (Programmable Logic Controllers) Replacement with Valmet DNA, upgrade of the existing Valmet DNA system and a single window operator interface in Valmet DNA for new sectional drives.

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