Large Scale Gasifier For Heat and Power

There are many different ways to extract heat and energy from biomass. One of the most efficient forms of combustion is gasification. The principle of gasification is not to try and extract all the energy in a single phase burn but multiple phases. Through heating biomass to over 300 degrees in a low oxygen environment you will produce a syngas which is high in carbon monoxide and some hydrogen. This gas can then be burnt more efficiently than a single stage burn of the fuel. By converting the biomass into a gas before combustion means you can do some pretty amazing things. Even on a small scale there are home made projects where people have made cars run from a gasifier. Previously I have covered the wood pellet car and the coffee bean car. This is a video of biomass gasification on a large scale to produce heat and power. As you can see from the video the benefits of this gasifier is that it is less sensitive to changes in fuel moisture content etc. The facts are that for most gasifiers to run efficiently they require a fuel with a consistent density, moisture content and particle size. Therefore we often get contacted for pellet mills and plants for gasification projects as pellets are the ideal fuel for the gasifier. On first impressions the video above of a gasifier which is not so dependant on these qualities may appear to reduce the need for pellets. While its true that this gasifier can run even on wet wood chips, there is still a need for pellets. Such a large gasifier will consume a lot of fuel, and in most cases there will not be a sufficient supply of local biomass. Therefore this will require transportation of fuel to the gasifier. Pellets have a density six times greater than loose biomass and a significantly lower moisture content. Transporting loose wet biomass is extremely expensive. So while the gasifier does not need to run on pellets, the business needs pellets to run the gasifier economically. So as you can see even when pellets are not required directly they have other indirect benefits. Local pellet plants further reduce transportation.