Energy-saving and carbon-reducing operation control and engineering verification of circulating fluidized bed boiler
A cooperative control model based on volume fraction of oxygen in flue gas and furnace outlet pressure was established in order to accurately predict the trend of real-time volume fraction of oxygen and provide control instructions for the secondary air fan and induced draft fan of the boiler in advance.Then the fluctuation of key operating parameters such as volume fraction of oxygen and furnace outlet pressure of the boiler was significantly reduced under different load conditions.The industrial validation results on a 300 t/h circulating fluidized bed boiler show that the cooperative control model can improve the quality of boiler operation and control.The statistical probability that the volume fraction of oxygen was controlled within the target value of±0.25%,and the furnace outlet pressure was controlled within the target value of±45 Pa under varying load conditions was 99%.The statistical results of one week's operation showed that the cooperative control model could reduce coal consumption per unit of steam production by 1.508%,and fan power consumption per unit of steam production by 1.886%compared with the original control.
volume fraction of oxygencooperative control modelfurnace outlet pressureenergy saving and carbon reduction
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