Biomass Fuel Pellets And Making Pellets
Posted in Uncategorized on 04/27/2009 01:33 pm by nfriend21Wood has been used to heat our homes for hundreds and thousands of years, it is a traditional as it can get in terms of home heating fuels. Today log stoves and boilers are quite rare, as many people have opted for oil and gas systems. The simple reasons for this change is the lifestyle changes that can be achieved by moving on to oil and gas is very appealing to most people. The levels of maintenance required for a gas or oil system is very low compared to log systems. Global Warming, climate change and price rises mean the days of oil and gas systems are numbered. There is however a compromise to oil and gas systems in the form of a pellet stoves or boilers. Pellet systems use wood pellets to provide the heat required. The pellet stove or boiler contains a hopper and feed auger. The auger into the burn chamber, to achieve the desired heat value, feeds the pellets.
Through compression, it is possible to re-form many materials into pellets. The raw material is compressed into a small cylinder shape. A good quality pellet will have a smooth surface, with a shine. Under horizontal pressure a quality pellet should break cleanly, with very little dust created. A noticeable snap notice should be heard from the pellet breaking apart. As stated pellets are simply the raw material, whether it is wood, grass or straw compressed into a small cylinder. Material compression takes place in a pellet mill. The material is compressed between a set of rollers and a die in the pellet mill. The diameter of the pellet is dictated by the diameter of the hole in the die. The most common size of pellet for use in stoves and boilers is either 6mm or 8mm, with 6mm pellets used in stoves and 8mm pellets used in boilers. The size of pellet the burner can use, depends on the size of the auger, with stoves generally having smaller augers, they use smaller pellets. Pellets can be made in large diameters, for example animal feed pellets are usually 10-12mm. Past 30mm pellets are regarded as briquettes, and briquettes are not as ideal for automatic feed systems, using augers for example. Large diameter pellets require less force to form through the die, therefore the larger the diameter of pellet the stove or boiler can take, then generally cheaper the fuel. All different types of raw materials can be upgraded into pellets, to be used as fuel, or for animal feed and bedding among other uses. By processing the material into pellets, with regards to fuel makes it far more efficient during burning.
Learn more about Pellet Mill Information and Wood Pellets
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