The invention provides a modeling method for a
coupling numerical value of
cracking reaction in a furnace tube and
combustion of an industrial
dichloroethane cracking furnace chamber. According to the method, the
dichloroethane cracking furnace is divided into a furnace chamber model and a furnace tube model during modeling, and grids are divided on the furnace chamber and the furnace tube. The furnace chamber takes an outer tube wall temperature given by the furnace tube model as a boundary condition, important furnace chamber
parameter distribution of the furnace chamber
flue gas temperature, the speed, the component concentration and the like is calculated by a
combustion model, a flowing model and a
heat transmission model; the furnace tube takes a furnace tube
heat flux calculated by the furnace chamber as a boundary condition, and process temperature, pressure and concentration distribution in a
tube length direction is calculated through a
cracking reaction model in the tube and taking
mass conservation,
momentum conservation,
energy conservation relations in the tube, so that analyses of important economic targets of the
dichloroethane cracking conversion rate, the selectivity, the unit consumption and the like under current operation conditions are facilitated, and guidance of filed
process optimization is facilitated. The modeling method is applicable to various high-temperature cracking furnaces and has a wide adaptability.