Abstract
The effects of fluidizing gas flow rate, pressurizing gas flow rate and superficial gas velocity at the riser inlet on the pneumatic conveying characteristics such as pulverized coal mass flow rate, differential pressure, solid-gas ratio, and voidage were investigated in a top discharge blow tank pneumatic conveying system at atmospheric pressure. The results indicate that as the fluidizing gas flow rate increases, the pulverized coal mass flow rate, differential pressure and solid-gas ratio increase at first and then decline, respectively. As the pressurizing gas flow rate increases, the pulverized coal mass flow rate and differential pressure increase gradually, while the solid-gas ratio increases at first and then declines. As the superficial gas velocity at the riser inlet increases, the pulverized coal mass flow rate and differential pressure increase gradually, while the solid-gas ratio increases at first and then declines. The voidage of all the experiments is below 0.95, so the top discharge blow tank system can achieve dense phase conveying.
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