How does the wind-driven dust removal system halve the air volume?

2020-07-07 13:22:34

In the wind-fed dust removal system, the cross-sectional area of â€‹â€‹the pipe is constant, the fan air volume is halved, the wind speed is halved, and the pressure is also halved.

It won't be halved, depending on how you use to reduce the air volume by half;

If the fan speed is reduced to reduce the air volume, the pressure in the duct section should be reduced to 1/4 of the original pressure, because the air volume is halved, that is, the pipe flow rate is halved, and the pressure and flow rate are squared, so the flow rate Reduced to the original 1/2, the duct pressure loss is reduced to 1/4 of the original, and then consider the dust removal system, as well as the hood, filter, damper and other system components and flow rate pressure loss relationship, determine the final How much pressure is reduced;

However, if the way to reduce the air volume by half is to adjust the damper and reduce the air volume by closing the small damper, the pressure will only increase and will not decrease.