Numerical Simulation Research Of Rapid Quenching Tower Of Coal Topping Pilot-Scale Experimental Apparatus

In the comprehensive utilization of coal areas, To utilize coal with high efficiency and remedy the shortage of petroleum and natural gas, A oil-gas-heat power co-generation technology, so-called"Coal Topping"process, was proposed by the Institute of Process Engineering, China Academy of Sciences. Rapid quenching of released volatiles is the key step."Coal Topping"process has developed the pilot-scale experiment.This paper is numerical simulation research of rapid quenching tower of Coal Topping pilot-scale experimental apparatus, by the FLUENT program. Firstly, study on the nozzles of water in the rapid quenching tower, this is the key component. We choose the pressure-rotating nozzles are produced by Lechler Company. Flow field distribute law of different cases was simulated. The results indicated that average velocity of flow match up to ruler of velocity of the quenching tower in the tower, when inlet-velocity of gaseous products increases to 1.5 times from 5.755m/s of design-case. Velocity distribute is uniformity laying the adverse current nozzles in the tower.Secondly, analyzed evaporation sports of water granules in the rapid quenching tower. Obtained the relationships of the evaporation times and temperature-diameter-velocity of water granule spurting from nozzles in the tower. The results indicated that light tar and un-vaporized water granules will be transferred to settling basin. At the same time, confirmed that it was propitious to heat transfer laying the adverse current nozzles in the tower through velocity of water granules.Finally, this thesis numerically simulated the heat transfer process in the rapid quenching tower, employing the Computational Fluid Dynamics (CFD) code FLUENT. The numerical results showed that operation parameter affected temperature field, such as: the different gaseous products flux, jet direction of nozzles, and change of cool water temperature. To satisfy the demand of outlet temperature of rapid quenching tower in the"Coal Topping"process, analyzed parameter optimization from hereinafter several aspect s in the rapid quenching tower, including, design-case, 1.5 times inlet-velocity of gaseous products, temperature of the cool water be increased to 25℃. We find the best operation parameter that it is suited Coal Topping pilot-scale experimental apparatus.