As society’s increasing demand for energy, petrochemical fuels as the main source of energy are rapidly decreasing. Therefore, the search for a renewable alternative energy has become the focus of general concern in society. Biomass energy is an ideal renewable energy source. It has a wide range of sources, and a large amount of industrial, agricultural and forest waste is produced every year.
Biomass fuel is directly used as boiler fuel, which is also an effective way to utilize biomass energy. In recent years, biomass boilers have developed rapidly in China. Biomass boiler is to directly or process agricultural and forestry straw waste in rural areas into biomass pellet fuel for boiler use. It has a double unity of social and economic benefits, and the use of biomass power generation enjoys preferential state subsidy policies.
There are three types of biomass boilers: type biomass boiler (chain grate), type biomass boiler (angle tube type chain grate), and type biomass boiler (circulating fluidized bed).
Biomass boiler performance advantages are as follows:
1. Type biomass boiler (chain grate):
Equipped with a blower fan for mechanical ventilation, and equipped with a screw slag machine for mechanical slag discharge, complete control and monitoring instruments, safe and reliable boiler operation, and discharged ash and slag can be used directly as farm manure .
2. Type biomass boiler (corner tube chain grate):
Boiler body adopts angle tube type, self-supporting structure, skillfully solved the boiler expansion and support structure is simple and reliable. The fuel is added to the furnace by spraying, so that the fuel is combusted in the mixed mode of “layer combustion suspension combustion”, and the combustion efficiency is high.
3, type biomass boiler (circulating fluidized bed):
It avoids or solves the problems of ash accumulation and slagging in the process of biomass combustion and heat exchange, and can operate stably for a long time. The emission of flue gas meets the relevant national environmental protection standards. The low carbon content of the ash and slag can realize the comprehensive utilization of fly ash.