Dense phase plug flow transfer: The 1-inch horizontal flow

The feeding of pulverized coals from a hopper into boilers is still considered a challenging problem. The low amount of transport gas required makes the dense phase plug flow system an attractive method to deliver the fine coal. The mechanisms of the transfer processes are little known. This paper d...

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Bibliographic Details
Published in:Powder technology 1990, Vol.62 (1), p.41-49
Main Authors: Aziz, Z.B., Klinzing, G.E.
Format: Article
Language:English
Subjects:
Applied sciences
Boilers
Energy
Energy. Thermal use of fuels
Equipments for energy generation and conversion: thermal, electrical, mechanical energy, etc
Exact sciences and technology
mechanical handling
two phase flow
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Summary:The feeding of pulverized coals from a hopper into boilers is still considered a challenging problem. The low amount of transport gas required makes the dense phase plug flow system an attractive method to deliver the fine coal. The mechanisms of the transfer processes are little known. This paper discusses the operational characteristics, flow patterns, and pressure loss behavior for plug flow conveying of fine cohesive coals. The fine coals were transported in half-plug or full-plug forms depending on plug length. Two pressure drop equations were proposed to predict the pressure drop across the plug for the plug lengths. The models were found to agree within ±20% of the experimental results.
ISSN:0032-5910
1873-328X
DOI:10.1016/0032-5910(90)80021-P