ZHANG Feng, WANG Yan, MENG Debiao, et al. Optimization of hot primary air duct for pulverizing system and its engineering application[J]. Thermal Power Generation2018, 47(12): 122-127.
ZHANG Feng, WANG Yan, MENG Debiao, et al. Optimization of hot primary air duct for pulverizing system and its engineering application[J]. Thermal Power Generation2018, 47(12): 122-127. DOI: 10.19666/j.rlfd.201804104.
To increase the unit capacity and improve the primary fan operating safety
optimization of hot primary air duct for the pulverizing system needs to be carried out. Through numerical simulation using the Fluent software
the optimal modification scheme for flue duct between the air preheater hot primary air outlet to the coal mill inlet was ascertained. The results show that
from the economic point of view
whether the unit capacity is increased or not
the investment recovery period of the primary air duct retrofitting is long and the energy saving potential is small. However
in the aspect of operating safety
optimizing the hot primary air duct is quite necessary when increasing the unit capacity. This conclusion was well-verified by the practical engineering application of optimal modification. The fan operating point was further away from the stall zone and its safety was significantly improved in spite of limited energy saving effect after the hot primary air duct retrofit.