Numerical Simulation Study on Cryogenic Separation of Low-concentration Coal-bed Methane
XIAO Lu
Abstract：Numerical simulation was carried out on the rectifying column used in the low-concentration coal-bed methane cryogenic liquefaction device. The results indicated that the rectifying column which was designed according to the data obtained by numerical simulation operated well in the pilot device, the simulated results were credible; the reflux ratio increased, the number of the column plates was reduced, but the energy consumption of the rectifying column increased, so proper reflux ratio should be selected by the overall economy; the feed position also had influence on the energy consumption of the rectifying column, and there was an optimum feed position; for the cryogenic liquefaction device of the coal-bed methane in low concentration of 35%, the actual reflux ratio of the rectifying column was 1. 513, the efficiency of the column plates in the device was 0. 7, the actual number of plates was 32;and the optimal feed position was the 9th plate.
Keywords：low concentration coal-bed methanenumerical simulationreflux rationumber of column plates
Publication Date：2015-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 40-43 )