Study On The Heating And Controlling Sections Of The Experimental Facility For Testing Combustible Liquid-vaporexplosion Characteristics

Along with the widely application of petrol, natural gas and the LPG, and the constructions of the important projects such as West-East Gas Transmission and LNG station, it is more and more emergent for preventing the combustible liquid-vapor explosion in projects and assuring the safety of the storage and transportation of these hazardous substances. Study on the combustible liquid-vapor explosion characteristics is a key problem of the safe production which should be immediately resolved for industry organizations.Corresponding experimental device is needed before the study on the combustible liquid-vapor explosion characteristics can be started. Domestic and international research and development of combustible liquid-vapor explosion were reviewed, and a theoritical analysis on the mechanism of combustible liquid-vapor explosion was made. Based on these previous works, an experimental device for testing combustible liquid-vapor explosion characteristics was designed and established, which provides a platform to the further research on this subject.The relationship of the total heat resistance, heat elimination and the external diameter of heat isolation layer of the inlet pipe was analyzed, and several ways of the explosion container heating were compared and the corresponding heat sources were calaulated. Then the critical diameter of the heat isolation layer was determined and the heating scheme was made in which two fibre glass heating stripes are employed to heat the inlet pipe, and the container heater is a cast aluminium infrared light heater in the shape of hemisphere. All parts have heat preservations specially designed.The thermostatic controller was designed by analyzing the temperature controlling methods on the explosion container and the mixture of combustible liquid-vapor and compressed air preheated. The heat load was systematically analyzed in the designing work, and finally a real object module was made. An ignition device also was designed in which a AC electric spark method was used.A preliminary test was taken using C₁₀H₁₈ and the result showed that the design has met the requirement of the study. It suggests that the device could be used for the study of the combustible liquid-vapor explosion characteristics.