Влияние гранулометрического состава песка на глубину проникновения дизельного топлива

Author(s):  
Dzhamil U. Dumbolov ◽  
Alexander V. Dedov ◽  
Luiza U. Dumbolova

Deployment of tanks for temporary storage of fuel on sand layer (a sand blanket) is an effective method to protect the soil from process-related spills. Asessment of the required thickness of the sand layer is important in practice, as it determines the layer’s protective properties when oil droplets fall on the surface. This paper investigates the dependences of the speed and depth of ingress of DT-Z-K5 diesel fuel on the grain size composition of the sand used as a protective layer. Substantiation has been given for the approach to the evaluation of the kinetics and to the depth of ingress of petroleum products into the sand, such approach being based upon the probabilistic movement of the fluid flow boundaries in the protective layer. It is proposed to describe the ingress of fuel into the sand layer in the coordinate system of the square root of the process time. Based on the results of the study, there have been established the dependences of the speed and depth of ingress of DT-Z-K5 fuel into the protective layer on the sand grain size and on the quantity of petroleum product leaked on the surface. It has been established that to create a protective layer preventing the ingress of fuel into the soil in the event of process-related leaks in temporary fuel storage tanks, it is optimal to use sand with 0.8 mm grain. Размещение резервуаров для временного хранения горючего на слое песка (песчаной подушке) является эффективным способом защиты грунта от технологических проливов. Практическое значение имеет оценка необходимой толщины песчаного слоя, которая определяет его защитные свойства при попадании на поверхность капель нефтепродукта. В настоящей работе исследованы зависимости скорости и глубины проникновения дизельного топлива ДТ-З-К5 от гранулометрического состава частиц песка, используемого в качестве защитного слоя. Обоснован подход к оценке кинетики и глубины проникновения нефтепродукта в песок, основу которого составляет вероятностное движение границ потока жидкости в защитном слое. Предложено описывать проникновение топлива в слой песка в системе координат корня квадратного из времени процесса. По результатам исследования установлены зависимости скорости и глубины проникновения ДТ-З-К5 в защитный слой от размера частиц песка и количества вносимого на поверхность нефтепродукта. Определено, что для создания защитного слоя, исключающего проникновение топлива в почву при возникновении технологических протечек резервуаров временного хранения горючего, оптимально использовать песок с размером частиц от 0,8 мм. Предложенный подход по получению зависимостей глубины проникновения топлива от условного времени можно использовать для оценки распределения топлива в слоях песка с различными размерами частиц.

2019 ◽  
Vol 8 ◽  
pp. 83-94 ◽  
Author(s):  
B.R. Rakishev ◽  
◽  
A.A. Orynbay ◽  
A.M. Auezova ◽  
A.E. Kuttybaev ◽  
...  

Author(s):  
В. Крыленко ◽  
V. Krylenko ◽  
Р. Косьян ◽  
R. Kos'yan ◽  
М. Крыленко ◽  
...  

The results of realized in 2010 field researches of the spatial and time grain-size structure variability of beach and bottom sediments of the bay-bar Anapskaya southern part are presented in this paper. Irretrievable carrying out of sediment particles to depths more than 7 m intensifies with their size decrease to 0,1 mm. As over 70 % bottom and about 60 % beach sediments are presented by fractions less 0,16 mm on bay-bar Anapskaya southern part, namely at this part there is sand material massive carrying out to depth. Potential danger of the investigated site geosystem degradation is revealed.


2020 ◽  
Vol 11 (2) ◽  
pp. 19-27
Author(s):  
A. V Zakharov ◽  
S. E Makhover

Today the issue of energy saving is acute. The main sources of energy are radiant energy of the Sun, wind energy, energy of moving water. Therefore, the issue of solving alternative energy sources is relevant. The article aims to solve the problem by using low-potential heat of the soil mass by means of energy-efficient building constructions - foundations. It is necessary to know the thermal characteristics of soils for this. At the moment, methods for determining the thermophysical properties of inert materials with subsequent practical application in the field of construction have been widely studied, but no one of these methods takes into account the grain-size composition. Thus, the study of the connection between the thermal conductivity and the grain-size composition of the soil is important. The aim of the work is to Estimation of thermal conductivity of sandy soils based on grain-size composition. This article presents an analysis of the dependence of the thermal conductivity of the sandy soil of its grain-size composition. The matrix of experiment planning is made; the methodology and technological sequence of the experiment were tested. Statistical processing of the obtained experimental data was carried out. Based on a series of test experiments, it was concluded that there are two factors competing in its thermal conductivity: an increase in λ due to an increase in the degree of pore filling and a decrease in total heat conductivity due to a decrease in the degree of pore filling. These results suggest that grain-size composition has an impact on the thermal conductivity of the sandy soil. During the experiment, the dependence of the thermal conductivity of sandy soils on their grain-size composition was experimentally established.


Author(s):  
Maria Popa ◽  
Loredana Irena Negoita

This paper presents a study on the migration into a soil structure of a pollutant, a liquid petroleum product. Accidental pollution with a liquid petroleum product can also be considered to crack a transport pipeline. This leads to the displacement of the pollutant in the soil structure, both horizontally and vertically. The study presents an analysis of the migration velocity in the soil structure, with certain physical properties, of both the soil and the pollutant petroleum product. The penetration of petroleum products to a certain depth in soil is influenced by its humidity, grain size and density, pollution intensity, viscosity and pollutant density. It was possible to calculate for the first time at the experimental laboratory level the depth of penetration of the pollutant.


Sign in / Sign up

Export Citation Format

Share Document