Experiment Study On Thermodynamic And Migration Characteristic Of Pollutant In Buried Oil Pipeline Leakage

As a long-term, stable and efficient mode of transport buried pipeline is widely used in oil and other energy delivery. Buried pipelines often are run corrosion for the old ages, and some vandalism by humans. The leakage of oil not only caused a lot of waste of resources and economic losses. But also it caused soil ecological destruction and biological which were difficult to repair for its effects of mutagenic, teratogenic and carcinogenic. As the buried pipeline rupture, leakage of the oil flowed into the soil. And its law of flow and heat transfer was underground for the detection about pipeline leak and the repair of pollutants. The process belongs to problems of the porous medium heat and mass transfer. By the experiments about buried pipeline leak pollutants heat migration, this study investigates the leakage of contaminants in the soil heat and mass transfer phenomena in porous media class, analyzes and summarizes the factors that influence the migration process. The study can provide a basis experimental data for the numerical simulation of buried oil pipeline leak process. And it also can provide support for the underground pipeline leak detection methods, such as optical and infrared, migration control and contaminated soil contaminants.In order to study the buried pipeline leak thermal migration of contaminants make the experiment. Firstly this paper discusses the characterization of contaminant migration status of parameters and measurement methods.Then combined the conclusion with the feasibility of buried pipeline leak experiment determined temperature as the characterization parameters.The two-dimensional and three-dimensional experimental device were designed for the leakage experiment of bureid pipeline. The experiment also measured the porosity of the experimental porous medium porosity and the viscosity of pollutants. The two-dimensional experiment device are visualization. Experimental device consists of six components: pollutant diffusion experiment box, the temperature record collection and transmission system, and leakage of pollutants heating system and image acquisition devices. The experimental device can record fluid migration in porous media fronts. And it can achieve a variety of experimental conditions, such as different porosity, temperature and fluid.Three-dimensional experimental device consists three part: heating system, the flow loop system, simulation experiment leak cabinet and cold source ventilation circulatory system. The experimental device make use of the outdoor cold source ventilation system for simulation low temperature environments, heating system to heat the pollutants, the flow loop system to simulate the leakage of fluid. Three-dimensional experimental device can achieve the soil environment with low temperature, variable rate of flow and variable temperatureThe pollutant migration experiments were made in many porosity. The experiments compare the effects of porosity, temperature and type of fluid. The experiments analysis its migration laws. Using three-dimensional experimental device made the pollutant migration experiments. Then accordding to the result of the experiment analysises the influence of flow rate, fluid temperature, and type of fluid.Through this study, the experimental device of buried pipeline leak pollutants was establishment. And this study gets the migration process law of the leak pollutants in buried oil pipeline. For further study of buried pipeline leak pollutants thermal migration lay the foundation. Providing a reference for engineering design and analysis in the relevant field.