Effects of Gas Type and Hopper Pressure on the Discharge of Pulverized Coal

The influence of gas type (air and CO2) and hopper pressure (0–400 kPa) on the discharge of the pulverized coal was investigated. For aerated discharge, fluidization in the hopper is the initial state of the discharge process; the state of gas–solid fluidization affects the subsequent hopper dischar...

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Bibliographic Details
Published in:Industrial & engineering chemistry research 2012-03, Vol.51 (9), p.3709-3714
Main Authors: Lu, Haifeng, Guo, Xiaolei, Gong, Xin, Cong, Xingliang, Liu, Kai, Qi, Haifeng
Format: Article
Language:English
Subjects:
Applied sciences
Atmospheric pressure
Barometric pressure
Carbon dioxide
Chemical engineering
Discharge
Exact sciences and technology
Fluidizing
Handling and storage of chemicals. Piping
Hoppers
Promotion
Pulverized coal
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Summary:The influence of gas type (air and CO2) and hopper pressure (0–400 kPa) on the discharge of the pulverized coal was investigated. For aerated discharge, fluidization in the hopper is the initial state of the discharge process; the state of gas–solid fluidization affects the subsequent hopper discharging significantly. Compared to air, CO2 showed a weaker ability to fluidize the pulverized coal, and thus it was more difficult to improve the hopper discharge at atmospheric pressure. On the other hand, increasing the hopper pressure did not affect the basic discharge law but increased the discharge rate to a certain degree. In addition, with the increase of the hopper pressure, the discharge differences between the air and CO2 aeration series reduced, because the discharge rate had a larger promotion from atmospheric pressure to 400 kPa for the CO2 case.
ISSN:0888-5885
1520-5045
DOI:10.1021/ie201689v