Wood briquettes are an easy and convenient solution for multi fuel burning, open fireplace burning etc. These are made from dry untreated wood chips and saw dust that are combined together by lignin. Lignin is a natural glue released by wood when it is put under extreme heat or pressure. The prevalent manufacturing process of these briquettes is, “take saw dust and wood chips together, apply high pressure(around 10000 pounds per square inch), wood briquettes are formed”. After manufacture, these usually are identical in size to house bricks, however, these can be easily broken into smaller parts for better suitability.
Wood briquettes are an environment friendly alternative to coal and charcoal. Along with being environmental friendly, these also have a much higher calorific value, resulting in increased heat output than coal or charcoal. Furthermore, these have a much lower ash content, thus freeing users from the trouble of transportation or disposal of the residues.
Usage Patterns of Wood Briquettes
The usage patterns of wood briquettes varies widely with geography. To elaborate, these are very popular as source for fireplace burning in most of Europe except the united kingdom, where these are yet to find favor with people. As for the united states, the popularity of these briquettes there varies widely across it's vast expanse. In some areas these are very popular, almost matching the favorability level seen in Europe, while in other areas these have negligible usage.
As for in India, these aren't used here for the purpose of fireplace burning but as cooking fuel. Many parts of India still doesn't have access to cooking gases or fuels, so people use replacements such as biomass or wood briquettes. Along with being used as cooking fuels, the briquettes sometimes are also used in religious ceremonies as a source fuel for igniting fire during havans.
Types of Wood Briquettes
Wood briquettes are usually of two types. These are :
Hardwood Briquettes – These are rectangular shaped and have a hole for better combustion.
Regular Wood Briquettes – These are cylinder shaped and do not contain any holes.
Advantages of Wood Briquettes Over Wood Logs
These have low moisture content compared to logs.
The briquettes produce less smoke while burning as compared to firewood logs.
These are cleaner and lighter than logs, as a result the briquettes are easy to store and carry.
These burn for a longer time.
Unlike wood logs, the briquettes are also ideal for use in places with low air ventilation.
These are also perfect for burning in large biomass boilers.