Introduction. The prospects for the construction of tanks with a protective wall of the "glass in a glass" type are due to the possibility of their use with increased safety requirements, in particular, when designing near residential areas or water areas. However, previous studies on the retention of fluid flow by a protective wall during the destruction of the internal reservoir have shown that in order to completely retain it, the wall height must be at least 10 % higher than the original liquid level in this tank. It is obvious that the construction of such high protective walls is economically impractical, while conditions can be created for the formation of zones of explosive concentrations both in its inter-wall space and behind the protective wall. In this regard, studies on an effective way to reduce the height by protecting the wall at the maximum level of filling the internal tank with a flammable liquid are relevant. In particular, it is proposed to consider the possibility of arranging on the protective wall an inclined wave-reflective visor facing the wall of the main tank. Goals and objectives. Experimentally prove the possibility of reducing the height of the protective wall of tanks with a protective wall of the "glass in a glass" type by arranging inclined wave-reflective visor on it. Obtain an empirical formula for finding the minimum height of the protective wall depending on the geometric parameters of the main tank, the interwall distance and the outbound length of the wave-reflecting visor. Methods. In the process of research, the methods of similarity theory and hydraulic laboratory modeling, physical experiment, observation, comparison, finding an empirical dependence based on mathematical processing of experimental data, description, generalization were used. Results and their discussion. It has been experimentally proven that the arrangement on the protective wall of inclined wave-reflective visor is an effective method aimed at reducing the height of the protective wall to or below the maximum level of flammable liquid in the main tank. An empirical dependence is obtained to find the optimal ratio between the outbound length of the wave-reflective visor and the inter-wall distance for the main tanks with a protective wall of the "glass in a glass" type, the nominal volume from 700 to 30000 m3. Conclusion. The proposed method of reducing the height of the protective wall and empirical dependence can be the basis for the development of the relevant provisions of the regulatory document on ensuring fire safety of tanks with a protective wall of the "glass in a glass" type, as well as used by design organizations to find optimal solutions for the design and placement of the types of tanks in question at production facilities. Keywords: "glass in a glass" tank, destruction, protective wall, inclined wave-reflective visor, laboratory modeling.
Introduction. Fire risk can be assessed qualitatively and quantitatively. A qualitative method for assessing fire hazard of the technological process (risk analysis) involves a detailed consideration of possible deviations from the technological regulations and failures in the production technology. Therefore, it can significantly increase the reliability of the hazard analysis to justify the technical decisions made to improve fire safety of production. Goals and objectives. Quantitative methods for analyzing fire hazard of technological processes and assessing fire risk have a number of significant drawbacks, they use various models, in which not always reasonable assumptions are often made. The use of such methods sometimes casts doubt on the results obtained. Hazard analysis using a qualitative analysis method is a sequential process of identifying violations not only of technological regulations, but also of fire safety requirements, and, consequently, the causes of accidents. Therefore, one of the most important purposes of this process is to check that all fire safety requirements are met. Methods. Method for assessing fire hazard of production technology by analyzing the consequences of "What happens if...?" (qualitative method of fire hazard assessment) allows us to consider problems related to possible causes of damage to technological equipment, the consequences of these causes, and the options adopted in the considered production for their prevention. The method is based on the development of a list of hazards, their division by hazard level and determining the most dangerous situations on this basis. Such a division makes it possible to increase the efficiency of the developed technical solutions that increase the level of fire safety of the production technology. Results and discussion thereof. The article reveals the essence of the method for assessing the fire hazard of production technology by analyzing the possible consequences of violations of technological regulations. The place of this method in the expert assessment of the fire hazard of production is shown and an example of the practical use of the method is given. Conclusion. Qualitative method of assessing fire danger of the technological process can complement quantitative methods, it can be their integral part, for example, when calculating the fire risk of production facilities, and it can act as an independent method for small enterprises in which it is not required to conduct a state expertise of projects, as well as when there is a need to assess compliance with fire safety requirements of the technical solutions adopted at the stages of design and operation of production. Keywords: pre-emergency situations, major accidents, fire safety system, explosion protection of a tubular furnace
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.