Circulating Fluidized Bed Boiler First and Second Winds
The size of the primary pressure head is mainly related to the composition of the bed material, the physical properties of the solid particles, the bed material thickness and the hearth temperature.
The effect of secondary air is mainly to supplement the combustion of oxygen and strengthen the mixing of materials
The amount of primary air flow depends on the fluidization rate and fuel characteristics and the furnace combustion and heat transfer and other factors, the amount of air flow in general accounted for 50% of the total air flow when the coal volatility is low when the air volume can be larger.
As the windmill hood and bed material (or material) resistance is great, and to make bed material to a certain fluidization state, so a high pressure head, generally in the 1400-2000mmH2O range.
The effect of the primary air is the raw material in the fluidized furnaces, and the oxygen is supplied to the fuel in the lower part of the furnace, and the combustion is carried out by the primary fan, and the air duct is fed into the furnace through the cloth wind plate and the hood,
