Numerical Simulation and Experimental Analysis of Dynamic Continuous Operation of Low-Concentration Coalbed-Methane-Mixing Device

The concentration of low-concentration coalbed methane extracted from underground coal mine fluctuates greatly, which does not meet the requirements intake coalbed-methane utilization devices. Due to this fluctuation, coalbed-methane-utilization device cannot maintain stable and safe operation. gas-mixing is mainly used in systems, providing each with a feed gas source qualified concentration. In order solve problems unsatisfactory uniformity mixing large resistance existing coalbed-methane-mixing device, mathematical model internal flow established. influence structure on change loss studied by numerical simulation experiment. When 7000 Nm3/h, 50,000 Nm3/h 160,000 respectively, spiral combination L-N-R, N-L-R L-N-R optimal (L, R, N indicate left rotation, right rotation without setting screw, respectively). There are some defects processing technology experimental make data different. process inside unit can provide technical means for reducing improving mixing, safety measures unit.