The centrifugal fan of boiler is essentially a constant pressure device with variable flow rate. When the speed is fixed, the theoretical curve of pressure and flow of centrifugal fan should be a straight line. Due to the internal loss the actual characteristic curve is curved and the pressure generated in the centrifugal fan is greatly affected by the change of inlet air temperature or density. Therefore some precautions should be kept in mind when installing.
1. Installation of exhaust Bend in centrifugal Fan of Boiler
When the pipe is installed at the outlet, the bending direction of the pipe should be the same as the rotating direction of the fan page, and the circular arc plate should be installed at the bend of the pipe, which can improve the working condition of the air flow and reduce the pressure loss of the system.
2. Installation of square air intake chamber for boiler centrifugal fan
When installing a square intake chamber, a circular arc plate should be installed at the bend of the inlet chamber, and a diversion plate should be installed at the inlet, and the air chamber should be as large as possible, the intake chamber W/R < 1.0. In this way, the swirl in the air chamber can be avoided and the pressure loss can be reduced. Reduce system noise.
3. Installation of round air intake chamber for boiler centrifugal fan
When the round pipe is installed in the inlet, the pipe should be connected to the fan directly and smoothly, which can avoid the decrease of the circulation area caused by the curved pipe and the loss of turbulence and pressure, and reduce the system noise.www.jnblower.com