It is possible to convert any kind of biomass waste into briquettes, for which one requires to install a briquetting press. Waste which can be processed and converted into briquettes in this press are rice husk, coffee husk, saw dust, groundnut shells, sugar mill waste, coir pith, tea waste, wild grasses and much more. No binder is required, just individual agricultural waste or forestry waste, or combination or both in briquetting. In the briquetting process, the size of material should be less and therefore corn husk, coconut shell and other waste material above 25mm are needed to be crushed into either shredder machine or biomass crusher.
More than one raw material can be compressed in the biomass briquetting press, but before mixing one needs to decide on the ideal proportion of the material based on their moisture content. Material having moisture content above 12% must be dried by sun drying or using a biomass rotary or turbo dryer.
A screw conveyor feeds the material into the press. Punches and tapper die compress the material. During compressing, the temperature rises, and lignin comes to the surface and binds material into briquettes. The briquettes are cooled down and pushed to the storage point from the press.
What is Biomass Fuel Briquettes?
Biomass waste is used for generating solid form of fuel called biomass briquettes, which are also known ass bio fuel, bio coal and white coal. These are generated in the briquetting process, in which low density biomass is converted into high density, high energy compact biomass. These are based on the binderless technology, means these are 100% binder free as there are no extra chemicals added in the process. These are made using progressive technology, in which temperature is regulated and the lining present in the waste heats and acts as a natural binder. Binder is completely natural, pollution free, economical and renewable.
Applications of Briquettes
Industries, units and plant that make use of briquettes are as follows:
- Chemical industries
- Milk plant
- Vegetable plant
- Pinning mill
- Leather industries
- Rubber industries
- Ceramic industries
- Solvent industries
- Dyeing units
- Textile units
- Lamination industries
- Brick making units
- Thermal units
These can also be used for domestic & commercial heating, furnace, foundries, brick kilns and boiler. Briquettes are a great substitute of firewood, coal and other fuels, given to the following benefits these provide:
These are more economical compared to coal.
When coal or oil is burnt, the high sulfur content present in them pollutes the environment. Briquettes have no sulfur content.
The thermal value of biomass briquettes is higher, and the as content is lower in comparison to coal.
When briquettes are burnt, no fly ash is produced.
Briquettes have high burning efficiency and are sized suitably for total combustion.
In briquettes, combustion is more uniform and the presence of high quantity of volatile matter results in quicker boiler response to changes in steam requirements. These are generally produced near the consumption centres. The density of loose biomass is 60 to 180 kg/m3m while the specific density and bulk density of briquettes are 1200 Kg/m3 and 800 Kg/m3 respectively. Briquettes can be handled easily for even long distance transportation. In comparison to loose biomass, briquettes require less storage space, and they incur less cost in terms of loading/unloading and transportation. These have higher density and low moisture, which is why these give high boiler efficiency.