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Guiling Xu

Bio: Guiling Xu is an academic researcher from Southeast University. The author has contributed to research in topics: Pulverized coal-fired boiler & Coal. The author has an hindex of 4, co-authored 9 publications receiving 46 citations.

Papers
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Journal ArticleDOI
17 Jul 2013-Sensors
TL;DR: The results show that the output voltage has a tendency to increase with the decreasing particle size, and the effect of particle color on calibration result is more predominant than that of sphericity.
Abstract: This paper presents a review and analysis of the research that has been carried out on dynamic calibration for optical-fiber solids concentration probes. An introduction to the optical-fiber solids concentration probe was given. Different calibration methods of optical-fiber solids concentration probes reported in the literature were reviewed. In addition, a reflection-type optical-fiber solids concentration probe was uniquely calibrated at nearly full range of the solids concentration from 0 to packed bed concentration. The effects of particle properties (particle size, sphericity and color) on the calibration results were comprehensively investigated. The results show that the output voltage has a tendency to increase with the decreasing particle size, and the effect of particle color on calibration result is more predominant than that of sphericity.

19 citations

Journal ArticleDOI
Guiling Xu1, Xiaoping Chen1, Cai Liang1, Daoyin Liu1, Peng Xu1, J.-Y. Cai1, Chuanwen Zhao1 
TL;DR: Based on the experiments of pulverized coal pneumatic conveying using nitrogen as carrier, the influences of riser inlet height above the gas distribution plate, riser diameter, and supplemental gas flow rate on the conveying characteristics were investigated in a laboratory-scale experimental setup of a top-discharge blow tank under atmospheric pressure as discussed by the authors.
Abstract: Based on the experiments of pulverized coal pneumatic conveying using nitrogen as carrier, the influences of riser inlet height above the gas distribution plate, riser diameter, pulverized coal external moisture content, and supplemental gas flow rate on the conveying characteristics such as pulverized coal mass flow rate and solid-gas ratio were investigated in a laboratory-scale experimental setup of a top-discharge blow tank under atmospheric pressure. There exists an optimal riser inlet height for a given top-discharge blow tank. The supplemental gas is one of the critical factors affecting the conveying stability and continuity. A model for material mass flow rate prediction with errors ranging from –25 % to +15 % is presented.

8 citations

Journal ArticleDOI
Xu Pan1, Xiaoping Chen1, Cai Liang1, Guiling Xu1, Daoyin Liu1, Changsui Zhao1 
TL;DR: In this article, the authors used the method of solid friction factor correlation to investigate pressure drop of the horizontal pipe, and non-dimensional parameters (Fr number, moisture content M and solid loading ratio µ) were investigated.
Abstract: In dense-phase pneumatic conveying, the solid moisture content can significantly influence the conveying process, but there are very few studies in the open literature In this study, the conveying experiments of two pulverized coals with various moisture contents were carried out at a 4MPa high pressure and dense-phase pneumatic conveying facility Results show that the whole conveying system can be stably and controllably operated under the condition that moisture content below ∼8% With the increase of moisture content up to ∼8%, the mass flow rate of 280 μm pulverized coal increases at first and then decreases, while that of 55 μm pulverized coal decreases continuously The method of solid friction factor correlation is used to investigate pressure drop of the horizontal pipe, and non-dimensional parameters—Fr number, moisture content M and solid loading ratio µ—are investigated The pressure drop predictions by this correlation are in good agreement with the experimental data The solid friction factor correlations indicate that the fine coal is more sensitive to M, and µ plays a more important role for the coarse coal

7 citations

Journal ArticleDOI
Guiling Xu1, Xiao Chen1, Cai Liang1, Peng Xu1, J.-Y. Cai1, Chuanwen Zhao1 
TL;DR: In this article, the effects of fluidizing and pressurizing gas flow rates on pneumatic conveying characteristics such as powder mass flow rate, solid-gas ratio, and voidage were evaluated.
Abstract: The effects of fluidizing and pressurizing gas flow rates on pneumatic conveying characteristics such as powder mass flow rate, solid-gas ratio, and voidage in a top discharge blow tank pneumatic conveying system are evaluated. Pulverized coal and glass beads were used to investigate the effect of powder properties on conveying performance. The results indicate that as the fluidizing gas flow rate increases, the powder mass flow rate and the solid-gas ratio increase at first and then decline. As the pressurizing gas flow rate increases, the powder mass flow rate increases gradually, while the solid-gas ratio increases at first and then declines. Since the voidage values of all experiments are below 0.95, it can be inferred that the top discharge blow tank pneumatic conveying system is able to achieve dense-phase conveying.

7 citations


Cited by
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Journal ArticleDOI
01 Feb 2015-Fuel
TL;DR: In this article, an improved empirical correlation was proposed to describe the quantitative relationship between angle of internal friction and particle shape factor, which agrees well with the experimental data and indicates that biomass is not suitable for dense-phase pneumatic conveying.

24 citations

Journal ArticleDOI
01 Jun 2014-Fuel
TL;DR: In this paper, the needle particle effect in a gravity discharge system, including adherence, lowering cohesion, arch-breaking and transition of flow pattern, is analyzed and verified by the experimental results.

21 citations

Journal ArticleDOI
TL;DR: In this article, a set of conveying experiments of pulverized lignite with different moisture contents was carried out, and a simple and effective method to find out the critical moisture content was developed.

18 citations

Journal ArticleDOI
TL;DR: In this article, the effects of operating parameters, particle size and diameter ratio on pressure drops across different sections of the pressure letdown system were examined, and it was shown that the pressure drop of the straight pipe section is responsible for over 70% of the total pressure drop through the system.

13 citations

Journal ArticleDOI
TL;DR: In this article, the effects of particle size, external moisture content (MC) and power type on powder flowability properties were investigated, and the results indicated that as the powder particle size increases, the AOR, HR and C decrease, respectively, and powder compressibility becomes better.
Abstract: The flowability properties of two carbonaceous powers (anthracite coal and petroleum coke), including angle of repose (AOR), Hausner ratio (HR) and powder compressibility (C), etc., were determined. The effects of particle size, external moisture content (MC) and power type on powder flowability properties were investigated. The results indicate that as the powder particle size increases, the AOR, HR and C decrease, respectively, and the powder flowability becomes better. As the powder external MC increases, the AOR, HR and C increase, respectively, and the powder flowability becomes worse. The anthracite coal has lower values of AOR, HR and C, and higher values of flow function (FF) than those values of petroleum coke. Therefore, anthracite coal has better flowability compared to petroleum coke. Meanwhile, there exists a good linear correlation between AOR and HR.

13 citations