In order to study effect of particulate circulating flow rate on pressure drop in riser

a cold experiment system of double circulating fluidized bed was established with differential pressure transmitters to probe axial pressure drop in riser. Based on various calculation methods of particulate velocity and different pressure drop mechanisms in different areas

pressure drop models were built for acceleration area

fully developed area

and whole riser. Pressure drop in the acceleration area by slip coefficient calculation was consistent with experimental value

while pressure drop in the fully developed area was relatively accurate upon assuming particulate slip velocity equal to terminal velocity. Therefore

pressure drop calculation in riser by comprehensive pressure drop models in the acceleration and fully developed areas could be good reference for pressure drop to be used in prediction of axial particulate concentration distribution in riser during production and provide guidance for on-line pressure drop monitoring in riser.