Improvement of a gas intake device and a gas mixing study in a large-scale vessel

Gas mixing is a common process in chemical engineering. For actual industrial manufacturing of chemicals, most reactions commonly run in reactors or reaction vessels with large volumes (over 10m³). In order to simulate a gas mixing process in a sealed reactor, and finally to improve the mixing effect between the gases, here the mixing process between methane and air in a reaction vessel with a volume of 10m³ was studied via several approaches. Several specific evaluation indexes, including the mixing degree, the maximum concentration difference, and the mixing time, were obtained and recorded to evaluate the mixing effect on the gases. After a series of experiments targeting the determination of the size and pressure difference values of the gas intake device, the mixing effect between methane and air was finally optimized. The mixing degree was found to reach 0.97 within 1h of monitoring, and the mixing time was decreased by 1700% from the original situation.