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The Biomass The Fuel

The Biomass The Fuel. Presented by James Bush Denton Park Estate Ventures Manager. What is Biomass?. Biomass is a collective term for many different forms of combustible material derived from plant sources.

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The Biomass The Fuel

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  1. The Biomass The Fuel Presented by James Bush Denton Park Estate Ventures Manager

  2. What is Biomass? • Biomass is a collective term for many different forms of combustible material derived from plant sources. • Can be material that has been taken from a primary production process (chip wood from forestry) or re-claimed material (such as used, clean untreated pallets) • There are 5 basic categories of Biomass: • Virgin wood, from forestry, arboriculture activities or from wood processing • Energy crops: high yield crops grown specifically for energy applications • Agricultural residues: residues from agriculture harvesting or processing • Food waste, from manufacture, preparation and processing, and post-consumer waste • Industrial waste and co-products from manufacturing and industrial processes.

  3. What are the various types of biomass? Chip • Produced by the use of a fuel grade wood chipper, most commonly from virgin round wood, but also from clean and untreated recycled wood and short rotation coppice. • Moisture content can vary greatly depending on the application of the fuel, and the requirements of the individual boiler. Chip boilers usually have an uppermost tolerance of 40% moisture, but generally chip is required to be sub 35% • Chip size is currently expressed using the Austrian Önorm standard, being the recognised standard stated by most boiler manufacturers at the moment. • This will be changing with the introduction of the European CEN/TC 335 solid bio fuel standards.

  4. What are the various types of biomass? Pellets • A uniform product derived once again from clean untreated timber. Produced by forcing milled timber (sawdust) through an extrusion die under extremely high pressure. • Moisture content of pellet is generally around the 6 % - 10 %. • Pellet size can be managed quite easily, with the diameter of the die determining the diameter of the pellet. Generally pellets will be no more than 25mm in length. • When using or purchasing pellets, consider the durability of the product as this is an important factor in the usability. • Will be governed under new European standards as with the chip.

  5. What are the various types of biomass? Straw • Produced as a part of the arable rotation on cereal farms and usually regarded as a staple animal bedding material. This is delivered in bales ranging in size and shape from 5” diameter round bales to 8” x 5” x 4” quadrants. • This particular fuel does not lend itself well to the smaller applications and is more often than not used solely in burners such as those found in a power stations. • There are no regulations governing quality of straw as a heating product; however, emissions as with any of the biomass products will be a self governing factor.

  6. The University has chosen woodchip as the preferred fuel type The fuel will be delivered by means of a hook lift bin system in lots of approximately 8 tonnes. The fuel will be specified in accordance with CEN / TS 14961:2005 (E) , one standard within the new CEN / TC 335 European standards for solid bio fuel The Fuel for the University

  7. How is the chip Produced • Origin: • The material all originates from woodlands situated within 30 linear miles of our site. • The material is all taken from Forest Stewardship Council (FSC) certified woodlands. • The bulk of the material is softwood (conifer) with a smaller proportion being made up of hardwood.

  8. How is the chip Produced • Preparation: • The material is bought in 4 metre lengths and transported to our site. • The timber is then stacked in 4 metre high stacks on bearers, pointing East – West. • The timber is dried for a minimum of 12 months before being chipped. • Before Chipping the timber is tested using a hand held moisture probe to get an indication of moisture content.

  9. How is the chip Produced

  10. How is the chip Produced • Processing: • The timber once dried is then fed through our drum chipper at a rate of approximately 20 – 25 tonnes per hour. • The chipper regulates its own in-feed system so maintains a continuous flow of material, which in turn maintains a constant chip size. • The chipper is able to take timber up to a maximum diameter of 32” (810mm)

  11. How is the chip Produced

  12. Delivery • The most common and preferred form of delivery is via bulk tipper in to an open hopper. • Delivery can also be made via a walking floor trailer where height restrictions are an issue. • Delivery via a hook lift bin is becoming more popular, but is a more specialist method due to the need for a purpose built delivery vehicle. • Less popular is delivery by blower; however, chip is not well suited to this form of delivery. • Please make consideration to the delivery when designing your system as this will more often than not be the cause of some heated discussion!

  13. Information • James.bush@ngbailey.co.uk • Tel: 01943 813398 • Mob: 07971 157693

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