Classification and applications of the ventilation fans

Classification and applications of the ventilation fans 

1.1 The ventilation fans classification

Structure and working principle, the fan to make the following classification:

1.2 The ventilation fans  application

    

ventilation fans  widely used in various industrial sectors, generally speaking, the centrifugal fan in place of a small flow, high pressure axial fan is commonly used in high flow, 

low pressure situation.

First, the boiler ventilation fans 

Boiler fan according to the specifications of the boiler the choice of centrifugal or axial flow. Its role is divided into the boiler fan? Conveying air to the boiler; to blower? Boiler flue gas siphoned.

Second, the ventilation fan

This type of fan is generally used in factories, and a variety of building ventilation and heating, ventilation, pressure is not high, but the noise requirements to be low, may be centrifugal or axial fan.

Industrial furnace (cupola, blacksmith furnaces, metallurgical furnaces, etc.) with fan

 

Such a fan requires a higher pressure, generally 2940 ~ 14700N/m2 pressure centrifugal fan range. Due to high pressure, impeller peripheral speed impeller, so the design should have sufficient strength.

Fourth, the mine ventilation fans 

It has two: one is the main fan (also known as the main fan) used to transport fresh air to the underground, its flow, axial flow is more appropriate, it also uses centrifugal; another local ventilation machine (also known as the Bureau fan) for the ventilation of the mine face, the flow pressure, the use of explosion-proof axial fan.

Five, pulverized coal ventilation fans

Conveying the pulverized coal thermal power plant boiler combustion system, the use of a centrifugal fan. Pulverized coal ventilator according to the different uses can be divided into two kinds: a storage bunker fan of pulverized coal, which is blown pulverized coal storage bin by the side of the furnace, coal is not directly through the fan, requiring ventilator the discharge pressure is high; another fan of the direct firing pulverized coal, it is directly sent to the pulverized coal furnace. Pulverized coal serious wear on the impeller and the body shell, it should be wear-resistant materials.