The industrial test of dense phase conveying of pulverized coal was presented.The transport stability and the effects of transport pressure on such factors as solid mass flow rate

solid/gas mass flow ratio and pressure drop were also investigated.The results showed that

with an increase in delivery pressure

the mass flow rate of pulverized coal and transport gas(N2) both increased

among which the relative increment of the N2 flow rate were higher.However

the solid/gas flow ratio decreased when the total pressure increased

it reached 8.4-18.6 kg/kg in the experiment.The pressure drop per unit length fluctuated

and increased with the coal mass flow rate

but the value was always below 2.4 kPa/m.