Y5-48 Centrifugal Induced Draft Fan for Boilers

Y5-48 Centrifugal Induced Draft Fan for Boilers is designed for 1t/h～20t/h industrial boilers burning various kinds of combustion materials and equipped with smoke-removing and dust-removing devices as long as the air inlet conditions and performance apply. But the maximum temperature cannot exceed 250℃. Dust removal equipment with an efficiency of not less than 85% must be installed before the induced draft fan to reduce the dust content of flue gas entering the fan and increase the life of the fan.

Key advantages:

1. Impellers-Such impellers are composed of 12 pieces of Q345 (16Mn) backward straight blades, and are welded between arc cone wheel cover and flat plate back disc. After dynamic balancing correction and over-speed running test, such impellers enjoy stable and reliable operation, high strength, wear resistance and long service life.

2. Fan casing - It is a volute casing welded with steel plates. Left rotation and right rotation fans with №8 and above can use the same casing type. It has a dust cleaning door, which is easy for workers to remove the dust fallen on impellers and inside blower casing and thus ensures impellers’ balance and aerodynamic performance.

3. Air inlet- With convergent and streamlined integrated design, the air inlet is fixed to the air inlet side of the fan with screws.

4. Air damper-The air damper has petal-design blades and are axially mounted before the air inlet. Fans with No. 4-6.3 have 9 blades for air dampers while blowers with fan No. of above 8 has 11 blades for air dampers. Thanks to the outside driving structure, they enjoy flexible and easy rotation. The adjusting range is from 0° (fully open) to 90° (fully closed). Looking from the side of the air inlet, the handle of the air damper is on the right side. For right rotation blowers, the handle moves from fully closed to fully open by moving from bottom to top. For left rotation blowers, the handle moves from fully closed to fully open by moving from top to bottom. Air damper has to be lubricated carefully to ensure its normal operation. Blowers apply temperature-resistant (260℃) molybdenum disulfide lubrication grease for lubrication, ensuring good lubrication under high temperature operation.

5. Driving system-The driving system consists of main shaft, bearing box and belt pulley, etc. The main shaft is made of quality steel and the bearing is rolling bearing. And the bearing box is water cooling integrated bearing box, so a water pipe has to be added; water consumption varies with ambient temperature and is usually considered as 0.5-1m3/h. Equipped with thermometer and oil level indicator, the bearing box uses 30# motor oil. The oil amount to be added shall be based on the oil level indicator.