In order to clarify the dynamic characteristics of bed temperature of biomass circulating fluidized bed(CFB) boiler

so as to establish a CFB combustion control system which is more suitable for biomass

a dynamic bed temperature model is established by analyzing the biomass combustion process and combustion mechanism.On the basis of the theory of instant burning carbon combustion

the correlation degree of temperature field in the furnace is calculated and analyzed. The results show that

the calculated bed temperature can be controlled basically stable near the filtering value of the actual bed temperature

and the variation trend of the bed temperature is similar to that of the actual filter bed temperature

which verifies the adaptability and effectiveness of the model. The temperature correlation difference of the upper and lower parts of the biomass CFB boiler is related to the oxygen content and the temperature of the furnace. The temperature difference of the left and right sides is greatly affected by the flue gas flow. In the upper part of the furnace

the material concentration and the uneven heating surface arrangement are also important reasons affecting the temperature characteristics.