The primary air fans in Baqiao Power Plant have high noise and low efficiency in operation

when the opening degree of baffle plate is larger

it results in serious environment pollution

and in disadvantage of operation regulation and safety. After retrofitting by using some new techniques

such as adopting high efficiency fans with backward bent blades

changing the number of blades and clearance in the fan throat etc.

noise resulting from the primary air fans has been greatly reduced

the overcurrent phenomena of said fans hasn’t occurred again

the operation efficiency being enhanced

reaching the requirements of design.