Concept and Technology
The process of "BRIQUETTING" is the physical transformation of the loose raw material into a compact form. The form change results in a much higher specific density of the material, which increases its combustion efficiency as compared to the loose material.
Briquetting (compacting)the Biomass , for fuel biomass is one of the simplest forms of using biomass. The residue left from crops and harvesting can be used as fuel biomass. This way, none of it goes to waste .
Briquetting of the husk could mitigate these pollution problems while at the same time making use of this important industrial/domestic energy resource. Moreover ,Loose production waste such as dust or shavings represents a considerable cost factor. By compressing this waste material into briquettes we can decrease costs while reducing the mess and increasing safety
By briquetting waste materials, volumes can be reduced by up to 90%. This creates a significant savings on transportation/handling/storage costs for later use as a heat source or simply for more convenient disposal. An additional advantage comes from briquetting flammable waste materials such as fine dust particles that are often created from wood processing operations. Briquetting eliminates the dust from the air and the mess created when removing dust collection bags, further reducing the risk of sparks or fire.
In addition to this commercial aspect, the importance of this technology lies in conserving wood, a commodity extensively used in developing countries and leading to the widespread destruction of forests.
The following agricultural and forest wastes and residues can easily be converted into fuel briquettes ie. "BIOCOAL"
|Forest Wastes and Residues||Agricultural Wastes and Residues|
|Saw Dust, Sandar Dust & Bamboo Dust||Husks - Rice, Coffee, Sunflower|
|Wood Chips and Shavings||Shells - Groundnut, Almond, others|
|Tree Bark and Twigs||Cotton Stalks, Arhar Stalks, Lantana Stalks|
|Pine Needles||Bagasse, Sugarcane Leaves and Trash, Press Mud, Jute waste|
|Wild Grasses and Shrubs||Maize Stalks and Cobs,Mustard Stalks,|
|Bamboo Leaves etc.||Bajra Cobs,|
|Coir Pith, etc.|
Calorific value of these agrowastes range from 3500 kcal/kg to 4500 kcal/kg. These and other materials can be briquetted individually or in combination
INFINITE briquette presses can process a variety of materials without the use of a binding agent. Therefore, it burns without the risk of any chemicals or contamination. Multiple sized round briquettes option is available. These low maintenance machines can be easily integrated into your existing production line or waste removal system.
Biomass densification, which is also known as briquetting of sawdust and other agro residues, has been practiced for many years in several countries. In Japan sawdust briquettes,are known as 'Ogalite', 'Prest-o-log' technology of the United States, the 'Glomera' method in Switzerland and the 'Compress' method in West Germany.
At present two main high pressure technologies: ram or piston press and screw extrusion machines, are used for briquetting. While the briquettes produced by a piston press are completely solid, screw press briquettes on the other hand have a concentric hole which gives better combustion characteristics due to a larger specific area. The screw press briquettes are also homogeneous and do not disintegrate easily. Having a high combustion rate, these can substitute for coal in most applications and in boilers, Gasifiers etc
1. Reciprocating ram/piston press Technology
2. Screw extrusion briquetting Technology
Although both technologies have their merits and demerits, it is universally accepted that the screw pressed briquettes are far superior to the ram pressed solid briquettes in terms of their storability and combustibility.
Worldwide, both technologies are being used for briquetting of sawdust and locally available agro-residues. Although the importance of biomass briquettes as substitute fuel for wood, coal and lignite is well recognized.