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

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• 作者：Haifeng Lu ; Xiaolei Guo ; Xin Gong ; Xingliang Cong ; Kai Liu ; Haifeng Qi
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2012
• 出版时间：March 7, 2012
• 年：2012
• 卷：51
• 期：9
• 页码：3709-3714
• 全文大小：292K
• 年卷期：v.51,no.9(March 7, 2012)
• ISSN：1520-5045

文摘

The influence of gas type (air and CO₂) and hopper pressure (0鈥?00 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鈥搒olid 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.