High low bed biomass direct combustion boiler with the combustion of biomass fuels and advanced technology

using a unique combination of low rate of circulating combustion

bulk biomass directly into the furnace combustion

is a new type of clean combustion technology. It has inherited the principle of circulating fluidized bed

and the bed surface is divided into the main bed and combustion side bed

not only solve the wear problem

but also can be used to approximate linear relationship between the integrated heat transfer coefficient and flow velocity

by changing the volume of air vice bed to regulate the absorption ratio and flow velocity

the fuel in the hearth and long residence time

height of the bed surface structure has strong dissemination effect

can rapidly drying combustion of low calorific value fuel all kinds of high water content

stable operation

in addition

biomass direct combustion saves the implementation cost of processing. This paper introduces the development prospect of this kind of furnace design and structure.