Biomass equipment for renewable fuel is a good source of energy for our environment. Most types of organic material can be burned for steam and power. The feedstock depends on what it will be best used for in the application, such as corn stover, distiller grains, animal bedding waste, manure, etc.
Biomass equipment can contain boilers and gasifiers. Boilers burn the various biofuels. Stoker boilers for example can handle sludge and combined fuels. Improvements are made with computer fluid dynamic modeling, over fire air systems, bed burning and emission controls.
It is good to note that all boiler manufacturers have improved their combustion air systems to help any prior emissions. The advantage of a stoker boiler is that is has lower capital cost for clean biofuels without the use of sulfur. They are mainly used in forest products, paper and power plants. A bubbling fluidized bed boiler is used for specific fuels such as wood waste.
A gasifier does have some advantages. It burns the biofuel in an oxygen starved setting. This produces hydrogen and methane, carbon dioxide and other small amounts of bio products. It operates at a low firing temperature for less slagging in the furnace, the ash is light, the syngas is clean and has less slagging than a downsteam boiler. Some gasifiers are intended for single fuel applications. Proper combustion controls are necessary for the most efficient operation in all boilers and gasifiers. Oxygen control is necessary for safety and efficiency. Startups, shutdowns and transitions are set in place to avoid any dangerous conditions.