3D dynamic thermal and thermomechanical stress analysis of a hot blast stove

Gan, Yu Feng; Jang, Jiin Yuh; Wu, Tiao Yuan

doi:10.1080/03019233.2019.1647384

Cited by 6 publications

(10 citation statements)

References 16 publications

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“…Meanwhile, the inner section of the checker chamber could not absorb the heat from the flue gas due to a lack of flow, even though the vortex temperature was high enough. The external combustion hot blast stove also shows the vortex, but it is located at the top of the checker chamber dome [12]. The dome combustion type has the vortex between the top of the checker bricks and the dome [7,9].…”

Section: Resultsmentioning

confidence: 99%

“…Since the hot blast stove has no recirculation or swirling flows, the standard k-ε model was regarded as appropriate for turbulence modelling. It has been implemented in numerous similar applications [5,12,26,27]. The transport equations to compute the turbulent kinetic energy k and the turbulent kinetic energy dissipation ε are described as follows [28]:…”

Section: Numerical Modellingmentioning

confidence: 99%

“…The checker bricks in the checker chamber were considered non-equilibrium porous media to simplify the model, and several studies were conducted based on this assumption [7,9,12]. For single-phase flow through a porous media, the volume-averaged mass and momentum conservation equations are described as follows [36]:…”

Section: Porous Media Modelmentioning

confidence: 99%

“…They computed thermal stress considering the mortar filled between the refractories and studied the change in the thermal stress according to the number of linings and the existence of the mortar. Gan et al [12] analysed the temperature and thermal stress of the refractories and the shell of the external combustion hot blast stove. A 3D model was developed to calculate the temperature and velocity fields during the operation.…”

Section: Introductionmentioning

confidence: 99%

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Temperature and Thermal Stress Analysis of a Hot Blast Stove with an Internal Combustion Chamber

et al. 2023

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In this study, the temperature and thermal stress fields of an internal combustion hot blast stove were calculated and analysed. Turbulent, species transport, chemical reaction, radiation, and porous media models were implemented in a computational fluid dynamics model. Thermal boundary conditions on the structure of the hot blast stove were calculated based on the analytic adiabatic Y-plus method. A method to interpolate the thermal boundary conditions to a finite element mesh was developed, and the boundary conditions were mapped through the proposed method. In the on-gas period, the vortex was generated in the dome, and it made the variation of the temperature field in the checker chamber. The maximum temperature of the flue gas reached 1841 K in the on-gas period. In the on-blast period, the flow was considerably even compared to the on-gas period, and the average blast temperature reached 1345 K. The outer region of the checker chamber is shown to be continuously exposed to a higher temperature, which makes the region the main domain in managing the deterioration of the refractory linings. The shell temperature did not change during the operation due to the lower thermal diffusivity of the refractory linings, where the inner surface of the refractory had a maximum temperature change from 1441 K to 1659 K. The maximum temperature of the shell was 418.4 K at the conical region of the checker chamber side. The conical region had the higher maximum and middle principal thermal stresses due to the presence of a large temperature gradient around the conical region, where the largest maximum and middle principal stresses were 300.6 MPa and 192.0 MPa, respectively. The conical region was found to be a significant area of interest where it had a higher temperature and thermal stress.

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Section: Resultsmentioning

confidence: 99%

Section: Numerical Modellingmentioning

confidence: 99%

Section: Porous Media Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Temperature and Thermal Stress Analysis of a Hot Blast Stove with an Internal Combustion Chamber

et al. 2023

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“…Hot blast stoves are critical assistive facilities for continuously providing hightemperature air (over 1200 • C) to blast furnaces in the ironmaking process. This hot air can promote pulverized coal combustion, reduce the coke ratio in ironmaking, and improve the production efficiency of blast furnaces [1][2][3]. At the same time, hot blast stoves are high-energy-consumption facilities, second only to blast furnaces.…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation Study on the Thermal Efficiency of Hot Blast Stoves

Zhang,

Tang,

Wang

2024

Processes

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Thermal efficiency is one of the important indices used to evaluate the operational energy efficiency of hot blast stoves. In this study, a method for calculating the thermal efficiency of hot blast stoves was developed based on simulation results. The working process of top combustion hot blast stoves was numerically simulated through the established 3D fluid flow heat transfer model. The system thermal efficiency of hot blast stoves was calculated according to the simulation data, referring to the Chinese national standard, “measurement and calculation method of the heat balance of blast furnace hot blast stove” (GB/T 32287-2015). In particular, a “segmented calculation and accumulate by time” method was proposed based on the air supply curve to more precisely calculate the heat carried away by the hot blast. The results indicate that when the burning air supply cycles increased from 120 to 240 min, the thermal efficiency showed a trend of first decreasing and then increasing, with the value ranging between 70.39% and 72.48%. The reason for the decrease in thermal efficiency at a burning cycle of 150 min is explained based on heat transfer theory combined with the structural characteristics of hot blast stoves. This study provides a convenient and effective method for calculating the thermal efficiency of hot blast stoves, which helps us to evaluate and improve the operating process of hot blast stoves.

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