Shape optimization of the exhaust hood in machining workshops by a discrete adjoint method

Liu, Fei; Chen, Haofu; Yuan, Hui; Zhang, Tengfei (Tim); Liu, Wei

doi:10.1016/j.buildenv.2023.110764

Cited by 6 publications

(1 citation statement)

References 24 publications

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“…The molten steel falls and collides with the ladle wall, instantly emitting a large amount of high-temperature dust-laden flue gas, which continuously exchanges heat with the surrounding air to generate a density difference. Therefore, buoyancy is generated to make the dust-laden flue gas move upward, forming a buoyant plume [8][9][10][11][12][13]. The flue dust at the steel outlet moves under the combined action of the jet and the plume and escapes into the air.…”

Section: Introductionmentioning

confidence: 99%

Fugitive Emission Characteristics of Fume and Dust from Short-Process Electric Furnace Tap Hole and Optimization of Dust Hood

Wu,

Luan,

2023

Atmosphere

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Due to the advantages of a short cycle, low investment and low energy consumption per ton of steel, short-process electric furnace steelmaking is about to welcome a golden period of rapid development in China. During the operation of the electric furnace, a large amount of smoke and dust is generated. Most studies focus on organized emissions, and the impact of unorganized emissions in workshops on the environment cannot be ignored. This paper evaluates the thermal environment in the electric furnace steelmaking workshop based on the analytic hierarchy process and obtains the influence weight of the fugitive emission location. The mass concentration of dust at each measuring point increased by 1.17 mg/m3 on average, and the concentration of unorganized emission dust near the outlet was 23.572 mg/m3. The numerical simulation calculation model is established by the CFD method, a fixed initial jet velocity is set, the initial velocity of the ladle soot plume is changed, and the inclination angle, arrangement height and dust removal air volume of the dust hood are respectively adjusted in different tapping periods. The impact of simulation on the efficiency of dust collection for different dust removal hood configurations was investigated, considering variations in inclination angle, arrangement height and dust removal airflow. The optimal structural parameters for the dust removal hood were determined to be an inclination angle of 60° and an arrangement height of 2.4 m, and an optimal dust removal airflow was determined to be 110,000 m3/h. This study provides a theoretical foundation for engineering practice.

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