Powder Flow R ate

There are two types of powder flow: bulk solids flow and suspension flow. The principles of powder
flowmeters for bulk solids flow and suspension flow are listed in Table 3.4 and Table 3.5, respectively.
The weighing method in Table 3.4 belongs to direct measurement, but others belong to
inferential
measurements.
The powder flow rate W (kg/s) in suspension flow is the product cvA (kg/s) of particle concentration
c (kg/m3), particle velocity v (m/s), and cross-sectional area A (m2). Therefore, the measurement
of the powder flow rate requires a combined measurement of particle concentration and particle
velocity. Table 3.6 lists the principles of the particle velocity measurement. The mean velocity of
powder flow across the cross-sectional area should be measured to obtain the powder flow rate from
the combined concentration-velocity measurement.