Effect of feeding gas on pneumatic conveying of pulverized coal in industrial-scale vertical pipe

被引：0

作者：

Pan X. ^{[1
]}

Guo X. ^{[1
]}

Lu H. ^{[1
]}

Liu K. ^{[1
]}

Fu L. ^{[1
]}

Li P. ^{[1
]}

Gong X. ^{[1
]}

机构：

[1] Shanghai Research Center of Gasification Technology, Key Laboratory of Coal Gasification and Energy Chemical Engineering of Ministry of Education, East China University of Science and Technology, Shanghai

来源：

Huagong Xuebao/CIESC Journal | 2016年 / 67卷 / 04期

基金：

中国国家自然科学基金;

关键词：

CO[!sub]2[!/sub; ECT; Gas switching; Pneumatic conveying; Stability;

D O I：

10.11949/j.issn.0438-1157.20151094

中图分类号：

学科分类号：

摘要：

The dense-phase pneumatic conveying of pulverized coal was investigated in an industrial-scale vertical pipe (50 mm I. D.). Air and CO2 was used as feeding gas or carrying gas, which consequently forms four typical cases, namely Air→ Air, Air→CO2, CO2→Air and CO2→CO2. Comparison was conducted between the above cases to analyze the conveying characteristics of pulverized coal experienced different courses. The results showed that the compound modes of feeding gas and carrying gas could affect the fluidized state of pulverized coal in the feeder vessel and result in the differences of stability and flow patterns of conveying process. Electrical capacitance tomography (ECT) was employed to monitor the flow patterns, while the solid concentration signals obtained from ECT were analyzed on the basis of standard deviation (SD) function and power spectral density (PSD) function. It was concluded that the flow pattern of pulverized coal in the case of Air→Air was a stable annular flow, and the stability of the case of Air→ CO2 was the worst in which the flow pattern changed from a stable flow to slug flow. Both cases of CO2→Air and CO2→CO2 performed plug flow. In comparison, in the case of CO2→CO2, the bigger plug and higher peak value of PSD were obtained. © All Right Reserved.

引用

页码：1169 / 1178

页数：9

共 23 条

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