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Waterproof cover for logging residue


A


paper-based and waterproof biomass cover from the Walki Group protects logging


residue stored on the ground, maximising the energy content of this inexpensive and easily accessible source of biofuel. To improve the energy content of logging residue it must first dry on the ground. Under Walki’s cover, it can be sheltered from rain, snow and ice for several months


before being stored.


The cover is a wide laminate that is mainly produced from a renewable, fibrous material. It shelters the top of the pile, but leaves the sides open, allowing moisture to evaporate. In addition to the four metre-wide laminate, Walki can now deliver six metre-wide laminate, the wider size providing considerable benefits in terms of increased efficiency, improved chip quality and higher prices.


Biomass moisture


The Moisturemeter II from INADCO Moisture Measurement BV of Eersel, The Netherlands, which has a patent pending, will allow users to receive continuous measurements of biomass moisture levels. In addition, the Moisturemeter II will also provide real time information on the calorific values of the biomass used.


Since 2000, INADCO has produced equipment that measures the bulk density of growing media such as potting soil and peat according to the European standard EN12580.


A recent Swedish study found that covering the logging residue with a six metre-wide laminate more than doubled the effect on ‘Dry Matter Content’ and also enabled the seller to achieve a higher return.


A thin plastic layer within the cover makes it both waterproof and very strong. This cover can be chipped along with the residue and then burnt as fuel in its entirety. More information from www.walki.com


measurement technology


Initially, the INADCO moisture measurement technology was developed to be used in these potting soil and peat markets, resulting in the development and introduction of the Moisturemeter I in 2006.


Based on the principles of this equipment, the Moisturemeter II is a new innovation that makes the technology available for the wide range of biomass materials now employed and in the more industrial uses of biomass, including power plants.


Currently biomass installations face the problem of changing


moisture percentages. The higher the moisture percentage in the biomass, the lower the energy yield will be in the boiler since the water in the biomass requires the installation to generate more energy for its heating and evaporation. To achieve the highest yield possible, the controls for the combustion process in the boiler always need to be adjusted when moisture percentages change. If controls are not adjusted properly the yield of the biomass will go down and the emissions of carbon monoxide and NOx will increase.


The new Moisturemeter II is equipped with a conveyor belt and even has an integrated belt scale. As a result, it can measure biomass while it is being fed into the boiler. This facility, in combination with state-of-the- art laser sensor technology, guarantees instant information such as: mass flow; flow of solids; flow of water; moisture percentage, actual and within batch; temperature of the product; total mass, per batch and lifetime; bulk density, actual and within batch; and real time calorific value of the dry matter (in combination with the fuel value). More information from www.inadco.nl


10 July 2014 10


Firewood processor


In 2012, Pentin Paja Oy developed a stroke harvester for agricultural tractors and small excavators that would be easy to use and install. By simplifying its design, the Naarva S23 weighed only 230 kg and did not require any electricity. It was a huge success and this harvester has now been modified into a firewood processor.


The cutting guillotine of the S23 can be equipped with firewood wedg- es, which are easy to attach with three bolts. This simple attachment cuts and splits firewood into lengths of 25, 35 or 50 cm directly after felling. To increase productivity of the Naarva S23 even more, Pentin Paja has developed a Naarva firewood rack – a simple, durable rack for a firewood bag that is mounted to a tractor. In bags, the firewood dries quickly. The Naarva S23 can produce from three to five and a half cubic metres of firewood in an hour, depending on the tree diameter.


More information from www.pentinpaja.fi


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