Studying on performance of the mixer for drained coal mine methane and ventilation air methane
Abstract：A kind of expanding jet-mixer was proposed,which was used to mix drained coal mine methane with VAM together,then the mixture produced will be sent into coal mine VAM oxidizer unit for oxidation.In order to assure safety of the oxidizer unit and the coal mine,the mixing process and the mixing effect of the mixer were numerical studied by using Fluent software.The calculating results show that by increasing the maximum diameter and cone angle of the ejector pipe,the uniformity can be improved,and resistance losses will increase accordingly.In a certain range,the increase of the cone angle of the tail cone can effectively improve the mixing effect,and has little influence to the flow resistance losses.According to the simulation results,the mixer was designed,manufactured,and tested.The test and simulation results are nearly the same,which verifies the validity of the simulation calculation.
Keywords：drained coal mine methaneVAMmixeroxidizer unitCFD
Publication Date：2011-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)