18 VALMET 3
18 INDUSTRY NEWS
a Metso mill-wide automation system. The environmental impact of the new plant has been positive. With a little over one year of operation, Lahti Energy has significantly reduced its use of coal. The carbon dioxide emissions under the EU emissions trading system (EU ETS) were reduced by 26 per cent from 2011 to 2012 and the specific emission carbon dioxide reduced by 32 per cent compared to the figures of 2011.
Getting more out of processes Because of rising energy prices, all industries are increasingly paying attention to the energy consumption and operating costs of their production lines. New innovations are already making pulp and paper makers’ production processes more efficient. For instance, a press to improve press dryness and save energy, as well as a new process for low consistency refining
are already part of commercial practice. Pulp and paper makers can also improve their product quality and materials efficiency through lightweighting and by using new coating methods. For the needs of power generation, the current
infrastructure for generating power and heat is based on coal and heavy fuel oil. Valmet offers solutions for markets dominated by these traditional technologies. These technologies can also make the existing power and heating plants more sustainable by
Pulp Paper & LogisticsPulp Paper & Logistics
using different kinds of biomass or sorted waste as a co-fuel. Hence Valmet is continuously expanding its fuel portfolio towards more demanding biofuels and developing new solutions for multi-fuel power production. As an example of bioenergy projects, the Nacogdoches generating facility in Sacul, Texas, was named the Project of the Year in the biomass category by Power Engineering magazine.
Customer value from close co-operation Valmet is known among its customers as a reliable supplier of solutions and services, and the numbers prove it. Today, 40 percent of the world’s paper is produced with Valmet’s machines. Over the past ten years, Valmet has delivered more than 13GWth of boiler capacity that utilizes renewable fuels and reduces emissions associated with fossil- fuel-fired boilers, by 40 million tonnes of greenhouse gases a year.
Renewable energy systems: some examples
Lignin separation Valmet’s LignoBoost process separates and collects lignin from the pulping liquor. The world’s first commercial installation of this technology was supplied to Domtar in Plymouth, North Carolina, USA, where it was started up in 2013. The second will be supplied to Stora Enso’s Sunila mill near Kotka in south east Finland with start-up scheduled for the first quarter of 2015. The separation of a portion of the mill’s total lignin production allows an increase in pulp production capacity. It also provides the mill with a new and more profitable value stream from a product that was traditionally burned in a recovery boiler. Lignin can be utilised as renewable fuel instead of fossil fuels and as a starting material for new bio-based products.
Bio-oil production Fortum’s first industrial-scale bio-oil production plant was commissioned in Joensuu, eastern Finland, in November 2013. The plant, integrated with Fortum’s Joensuu combined heat and power plant (CHP), is the world’s only example. It will annually produce 50,000 tonnes of bio-oil from wood-based fuels, in addition to electricity and district heat. The produced bio-oil can be used to replace heavy fuel oil, for example, in power plants and
July/August 2014
this annual production corresponds to the heating needs of around 10,000 households. In the future, bio-oil could be further processed into transportation fuels and raw material for the chemicals industry. Valmet supplied the plant to Joensuu as a turnkey delivery, including
the foundations and buildings, feedstock reception and pre-treatment, pyrolysis system, bio-oil storage tanks and loading equipment, as well as a Metso DNA automation system and electrification. The delivery also included installation, testing and training.
Valuable products from biomass A prehydrolysis system will be supplied by Valmet to Bioprocess Pilot Facility BV’s (BPF) bio pilot plant in Delft, The Netherlands. BPF’s bio pilot plant is designed to handle different biomass raw materials and agricultural wastes like wheat straw and bagasse, and also wood. The key systems of the pilot plant are biomass feeding, hydrolysis reactors and equipment for the separation of liquid and residual solid biomass after hydrolysis. Valmet’s delivery consists of a prehydrolysis system on a pilot scale that is designed for a capacity of 40 kg of wheat straw (biomass) per hour. The start-up of the system is scheduled for August 2014. The prehydrolysis step prepares the biomass and renders the polysaccharides accessible, and is an important initial step in several bio-refining processes.
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