Gas Dra Synthesis And Drag Reduction Performance Test Equipment Design

The natural gas is in great demand because of the needing on the continuous economic development and the calling on "clean energy" . At present, the main gas transportation mode is pipeline transportation, the long-distance, big-diameter and high-pressure pipeline is the main developing flow of gas pipeline in the world in order to increase the pipeline throughput. But, the pressure loss caused by pipe wall friction is the first problem during the actual gas pipelining process. Especially as far as the turbulent flow with high Re number, the effect of pipe wall roughness on the pressure loss is the most important. So it is a big project to decrease the pressure loss and to increase the gas throughput by reducing the pipe wall roughness for the science and technology workers on pipeline in the world. At present, the drag-reducing technology of using the inner-coated pipeline is adopted to reduce the pipe wall roughness, which obtains excellent results and better economical benefits. But, for this technology, the construction equipments are complex and the cost is high, the more serious problems are that the drag-reducing effect reduces and the inverse effect happens because of the runaway coating after long-time transportation and irregular pigging.In 1990s, the gas DRAs (drag reducing agents) technology was firstly introduced and was applied in field tests by America, the initial effect was obtained. The chemicals with surface activity said as gas DRAs were periodically injected into gas pipeline, the polar terminal was adsorbed onto the pipe iron wall surface to form the elastic film, so the pipe wall roughness was accordingly reduced and...