Buried hydrogen-doped natural gas pipeline leakage diffusion simulation experiment device and test method

Abstract

This invention discloses a simulation experimental device and testing method for the leakage and diffusion of buried hydrogen-blended natural gas pipelines. The device includes nitrogen cylinders, natural gas cylinders, and hydrogen cylinders, with their outlets connected to a gas mixer. The gas mixer is connected to a compressor via pipeline. The device also includes an experimental sandpit containing a simulated pipeline. A leak point is located at the top of the simulated pipeline, and a solenoid valve is installed inside the leak point. Monitoring instruments are arranged around the leak point and connected to a data acquisition system. The compressor is connected to the simulated pipeline. Sprayers are spaced apart on both sides of the experimental sandpit. This experimental device and method can accurately detect the concentrations of methane and hydrogen above the leak point of the simulated pipeline, simulating the leakage and diffusion process of a real buried hydrogen-blended natural gas pipeline under various flow rates, hydrogen blending ratios, pipeline pressures, and sand moisture conditions, which has practical significance.

Images