Study on Hazardous Areas of Hydrogen Fluoride Diffusion Based on CFD Simulation

Abstract

Hydrogen fluoride (HF) is a typical dangerous gas in the fluorine chemical industry. Its leakage is one of the most common types of accidents in this industry, and it poses a serious threat to personnel safety and health, environmental sanitation, and social stability. In this paper, the process and consequences of an HF leakage accident in a fluorine chemical plant were simulated by using computational fluid dynamics (CFD) simulation software, and hazardous areas (lethal area, severe injury area, light injury area, and maximum allowable concentration area) of HF diffusion were determined according to the HF concentration corresponding to the degree of personal injury. Moreover, the effects of wind speed and height on hazardous areas were analyzed. The research results of this paper provide model support for similar enterprises to predict the consequences of harmful gas leakage accidents, and give suggestions on emergency evacuation and rescue work, which have practical application significance.

The Effects of Ambient Temperature and Atmospheric Humidity on the Diffusion Dynamics of Hydrogen Fluoride Gas Leakage Based on the Computational Fluid Dynamics Method

“…It is suitable for simulating the leakage and diffusion of toxic and hazardous gases in complex scenarios. Combined with the physical parameters of HF validated in the previous work of our research group [ 31 ], it can be used to numerically simulate the process of HF gas leakage and diffusion.…”

The Relationship between Fluoride Exposure and Cognitive Outcomes from Gestation to Adulthood—A Systematic Review

“…A total of 31 out of the 46 included studies reported their cognitive outcomes using mean IQ scores alone. Of these, 25 [22,27,29,30,[32][33][34][35]37,39,[42][43][44][45][47][48][49]51,53,58,[61][62][63][64]67] concluded that the mean IQ levels of children exposed to fluoride at more than or equal to 2 mg/L were significantly lower than those exposed to <2 mg/L, while the remaining 6 studies reported no significant association between the fluoride exposure and the mean IQ of participants [40,41,46,54,65,66].…”

“…We report results using a subgroup analysis according to (1) study design; (2) age group; (3) fluoride level; and (4) study quality (Table 1). ≥2 mg/L 26 [22,23,25,27,28,30,31,34,37,39,[41][42][43][44][45][46][47][49][50][51]53,56,58,63,64,67] 24 (92) [22,23,25,27,28,30,31,34,37,39,[42][43][44][45]47,[49][50][51]53,56,58,63,64,67] Not reported 9…”

“…Out of the seven studies [35,43,54,56,59,62,66] which were classified as good quality, two longitudinal studies [54,56] and three cross-sectional studies [35,43,62] showed a significant negative relationship between fluoride and cognition. Among the 14 studies [23,24,26,29,33,37,39,42,45,[47][48][49]51,67] that scored "fair", 13 studies [23,26,29,33,37,39,42,45,[47][48][49]51,67] had a significant negative association, and from the 20 studies [22,27,28,[30][31][32]34,36,38,41,…”

Consequence analysis of CNG leakage at joint refueling and charging stations

“…Scholars have widely investigated leakage diffusion of combustible gas and quantified gas concentration distributions and hazard areas of H 2 , 4-6 liquefied petroleum gas, 7 and liquefied natural gas (LNG) [8][9][10][11][12][13] using PHAST, ALOHA, FLUENT, FLACS, and computational fluid dynamics (CFD) software. The influences of wind conditions, 14,15 aperture, 16,17 and obstacles 18,19 on gas leakage diffusion have mainly been studied in terms of the influencing factors, and the obtained results could provide an important basis to resolve accidents and mitigate pollution hazards. Parvini and Gharagouzlou 20 used the PHAST software to simulate the explosion overpressure, fire type, and toxic release process attributed to gas leakage after damage to automobile compressed natural gas (CNG) containers to obtain the minimum safe distance from the rupture center.…”