Theoretical study on the cooling procedure for vertical flow sinters

Pan, Lisheng; Wei, Xiaolin; Yan, Peng; Ma, Yuejing; Li, Bo

doi:10.1016/j.applthermaleng.2017.08.064

Cited by 16 publications

(7 citation statements)

References 4 publications

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“…The results showed that the factor with the most influence on dimensionless exergy consumption was the inner diameter of the vertical shaft cooler, followed in order by cooling air flow, height of the vertical shaft cooler and sinter flow. In addition, many researchers [10][11][12] have used analytical methods to study the above contents and obtained similar conclusions.…”

Section: Introductionmentioning

confidence: 74%

Influence of Variable-Diameter Structure on Gas–Solid Heat Transfer in Vertical Shaft Cooler

Zhang

et al. 2022

Metals

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In order to improve the heat transfer between high-temperature sinter and cooling gas in a vertical shaft cooler, a new furnace type with variable-diameter structure was proposed, and the influence of variable-diameter structure on gas–solid heat transfer in vertical-shaft cooler was studied by CFD-DEM coupling method in the current work. The results show that variable-diameter structure can increase the quantity of low-temperature sinter as well as the outlet cooling gas temperature, and can improve the uniformity of sinter and cooling gas temperature along the width, at the cost of significantly increasing the cooling gas pressure. By changing the parameters of the variable-diameter structure, it was found that a smaller width of the vertical section or a larger angle of the contraction section led to a better sinter–gas heat transfer. The influence of vertical section width on cooling gas pressure was more obvious. It is suggested that when designing and using the vertical shaft cooler with variable-diameter structure, consideration should be given to the effect of sinter–gas heat exchange and the pressure of cooling gas. Furthermore, the occurrence of material blockage and excessive equipment height should be avoided.

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Section: Introductionmentioning

confidence: 74%

Influence of Variable-Diameter Structure on Gas–Solid Heat Transfer in Vertical Shaft Cooler

Zhang

et al. 2022

Metals

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“…Zheng et al [10,11] presented the effects of several design parameters on the volumetric exergy transfer coefficient and volumetric transfer coefficient in terms of the second law of thermodynamics and pilot experimental method. Pan et al [12] established a theoretical model of gas-solid heat exchange to determine the effects of the operational parameters on the heat transfer and pressure drop. Feng et al [13] determined the overall heat transfer coefficient using a pilot experimental method.…”

Section: Studies Of the Heat Transfer Performance Of The Vscbmentioning

confidence: 99%

Study of Heat Transfer and the Hydrodynamic Performance of Gas–Solid Heat Transfer in a Vertical Sinter Cooling Bed Using the CFD-Taguchi-Grey Relational Analysis Method

Cai

2020

Energies

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The vertical sinter cooling bed (VSCB) is a high-efficiency energy-saving and environmentally friendly waste heat recovery equipment. In this study, a computational fluid dynamics (CFD) convection model was established to reveal the typical factors on the thermodynamic performance in VSCB. Indeed, a multiple performance optimal algorithm based on the Taguchi-grey relational analysis (GRA) method was first applied to investigate the effects of geometric and operational factors, including the diameter of the bed, height of the bed, air mass flow rate, air inlet temperature, and sinter mass flow rate, on improving the heat transfer (Ex) and hydrodynamic performance (Pdrop) and obtain the optimum combination of each factor in VSCB. The results found that the diameter of the bed was the most influential factor contributing the multiple types of performance with a contribution rate of 70.51%, followed by the air mass flow rate (15.84%), while the height of the bed (0.27%) exerted a limited effect on the performance of multiple processes. The optimal combination of factors (A1B5C5D5E1) was compared with the initially selected parameters by performing a confirmation test. The performances of heat transfer and hydrodynamics were improved by the Taguchi with the GRA method.

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“…During the cooling process, a large amount of sensible heat is produced, which is expected to be recovered to reduce energy consumption and mitigate the environmental impact. During the past decade, a considerable number of research papers have been developed in the field of VSCB, mainly focusing on thermodynamics parameters, such as the solid and gas inlet temperature, solid and gas inlet mass flow rate, aspect ratio of VSCB [1][2][3], and gas pressure loss [4][5][6]. Moreover, optimization studies have examined the coefficient of heat transfer [7,8] and exergy transfer [9,10].…”

Section: Introductionmentioning

confidence: 99%

Parametric Study on the Flow Profiles of Vertical Sinter Cooling Bed Using the DEM and Taguchi Method for Waste Heat Recovery

Cai

2020

Energies

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To comprehensively understand the effectiveness of external factors on flow characteristics and realize particle flow distribution evenly in bulk layers is an essential prerequisite for improving the performance of heat transfer in vertical sinter cooling beds (VSCBs). The numerical discrete element method (DEM) was applied to investigate external geometric and operational factors, such as the aspect ratio, geometry factor, half hopper angle, normalized outlet scale, and discharge velocity. Using the Taguchi method, a statistical analysis of the effect of design factors on response was performed. In this study, we focused more on external factors than granular properties, be remodelling the external factors was more useful and reliable for actual production in industries. The results showed that the most important factor was the aspect ratio, followed by the geometry factor, normalized outlet scale, half hopper angle, and discharge velocity for the dimensionless height of mass flow. In terms of the Froude number, the most influential factor was the normalized outlet scale with a contribution ratio of 33.81%, followed by the aspect ratio (22.86%), geometry factor (17.73%), discharge velocity (17.73%), and half hopper angle (11.83%).

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Theoretical study on the cooling procedure for vertical flow sinters

Cited by 16 publications

References 4 publications

Influence of Variable-Diameter Structure on Gas–Solid Heat Transfer in Vertical Shaft Cooler

Influence of Variable-Diameter Structure on Gas–Solid Heat Transfer in Vertical Shaft Cooler

Study of Heat Transfer and the Hydrodynamic Performance of Gas–Solid Heat Transfer in a Vertical Sinter Cooling Bed Using the CFD-Taguchi-Grey Relational Analysis Method

Parametric Study on the Flow Profiles of Vertical Sinter Cooling Bed Using the DEM and Taguchi Method for Waste Heat Recovery

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