BAI Jianyun, ZHU Zhujun, ZHANG Peihua. Online soft measurement of NOx mass concentration for circulating fluidized bed boiler based on BP neural network[J]. Thermal power generation, 2016, 45(12): 78-83.
BAI Jianyun, ZHU Zhujun, ZHANG Peihua. Online soft measurement of NOx mass concentration for circulating fluidized bed boiler based on BP neural network[J]. Thermal power generation, 2016, 45(12): 78-83.DOI:
In circulating fluidized bed(CFB)boilers using selective non catalytic reduction technology
the produced NO_x mass concentration can not be directly measured online
which prevents automatic control of the NO_xemission and the unit economic operation.Taking a 300 MW CFB boiler using soft measurement technology as the example
the main factors influencing the NO_x mass concentration are unit load and oxygen volume fraction
field data of each factor were collected respectively
and was BP neural network model built.Applying the model to the Xinhua DCS system
thus the on-line boiler NO_x mass concentration was realized
and by which the NO_x mass concentration was obtained 120 searlier than by sensor measure.So the control effect of flue gas desulfurization system is improved.