Analysis of pneumatic transport of pulverized coal using solid phase velocity estimation method

The design equations were compared with experimental results. Solid phase velocity estimated with the force balance equation is effective for improving the accuracy of pressure drop prediction even though the drag force of the solid phase was estimated based on the single particle terminal velocity. Because the contribution of the pressure drop at the exit of the feed tank is usually significant, a special emphasis was put on the region of particle acceleration in deriving the pressure drop estimation.

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► The pressure drop prediction of the pulverized coal conveying can be improved with the new solid phase estimation method.
► The solid phase velocity was estimated with the force balance equation.
► The pressure drop predicted in terms of the frication factor was corrected using the estimated solid phase velocity.
► The correction can be repeated until the estimated pressure drop converges within a desired error range.
► A new method was suggested for the estimation of the pressure drop in the acceleration region.