8.3.1.2 Conveying air requirements
The differences in minimum conveying air velocity values that can be used for the three material types result in totally different conveying air requirements. These are shown in Figure 8.2. This is a plot of material flow rate against air mass flow rate and is drawn for a 200 m long pipeline of 75 mm bore with a pressure drop of 3 bar. With the plot being one of material flow rate against air flow rate, lines of solids loading ratio have also been added as these are simply straight lines through the origin.