Materials for pressing fuel briquettesAs an alternative fuel of fossil fuel, biomass briquettes is one of the most frequently used fuel in developing countries for the advantages of renewable, green and high availability. Various of biomass materials can be processed by the fuel briquette press with the pressure of 49 -196 Mpa into high density briquettes in various shapes, which is used to fuel the boilers, stoves, furnaces, etc. At present, the briquettes fuel is produced in large scale to meet the energy needs and provide a solution for waste management. However, confronted with the various biomass materials, several factors should be studied to qualify the materials as feed-stock.
Various biomass materials for pressing fuel briquettes
Availability is the one of the decisive factor of establishing a biomass fuel briquette plant, which defines the productivity of the briquettes. And besides the availability of the raw materials, the following features also should be considerated.
Moisture content is the one of the most important factors that influces the quality of briquettes. The lower moisture content, the better the quality of the briquettes . Usually, the proper moisture content ranges from 8 -15%. Higher moisture content materials need to be dried before conveying into fuel briquette presses or it will damage the briquette presses or the briquettes can not be formed.
Ash content is one of the standards that quality briquettes needs to meet. Ash of biomass residues may cause devolatilization during burning and result in slagging and deposition which may damage the boilers, stoves and other equipment because of the alkaline minerals such as potash.
The ash contents of various biomass indicates the slagging of the biomass briquettes. Generally, higher ash content cause greater slagging behavior. Besides the ash content, the operation temperature, the ash composition and percentage have a combined effect to the slagging. Usually, the slagging happens when the ash content of the biomass reaches 4% and when SiO2, Na2O and K2O are contented, more troubles are caused which will be an indicator of the quality of briquettes, and classified as severe or moderate slagging fuel.
The materials should be flowable because after being milled into fine particles it can flow easily in bunkers and storage silos. If it is too sticky, it will cause problems for the fuel briquette presses.
Fuel briquettes press and Briquettes