Improvement of a Gas Intake Device and a Gas Mixing Study in a Large‐Scale Vessel

Abstract

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 10 m3). 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 10 m3 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 1 h of monitoring, and the mixing time was decreased by 1700 % from the original situation.

Experimental and numerical studies of premixed methane‐hydrogen/air mixtures flame propagation in closed duct

“…Many previous studies have tested the explosive characteristics of combustible gases in recent years . There are many influencing factors of the gas explosion, including the composition of gases, the size of combustion space, the gas turbulence, and the location of the ignition source.…”

Influences of the Cloud Shape of Fuel-Air Mixtures on the Overpressure Field

“…Up to now, influencing factors of the overpressure of fuel-air cloud have been widely studied. Some works on the enclosed space have paid attention to the influencing factors of the overpressure production process of gas-liquid twophase, gas-solid two-phase, and gas-liquid-solid three-phase within the vessel in laboratory [2][3][4][5][6][7], such as the location of the detonation initiation point [8,9], energy [10] and ignition way [11], particle size [12] of fuel-air mixtures, and fuel type [13]. Moreover, the related computational model had been established [8,14].…”