The Simulation And Analysis Of Coal Pyrolytic System

To utilize coal with high efficiency and remedy the shortage of petroleum and natural gas, an oil-gas-heat-power co-generation technology, so-called "coal topping" process, was proposed by the Institute of Process Engineering, China Academy Sciences.This paper based on the theory of gas-solis two-phase,carried the numerical simulation on the roller external fluidized bed, which was the part of the pyrolysis system in Coal Top technics. Application of multiphase flow in Fluent software and the method of drawing meshes are studied,discrete equations are achieved by Finite Volume Method.Time-step,under relax factors and effect of solver choice are studied. After two-dimensional and three-dimensional computed numerical simulation,this paper has analyzed the ash density change situation in the drum fluid bed the drum nearby solid ash content density change situation, after as well as joins a drum, gas solid dynamic performance change.This paper combined theory with engineering application studied the design and computing method of rapid quenching equipment in the system and put up a set of reliable computation methodology. There must be some mistakes in the design, hope other researchers add. Cooling water circulation volume was obtained by study the calculation method of rapid quenching system, and then calculated spray intensity, tower diameter and tower height.This paper studied the pyrolysis and rapid cooling equipment ,providing the basis for coal topping experiment,taking a great significance on clean coal technology.