POLYMERIZATION TANK TEMPERATURE DISTRIBUTION ESTIMATION APPARATUS AND POLYMERIZATION TANK TEMPERATURE DISTRIBUTION ESTIMATION PROGRAM

摘要

This invention provides a polymerization tank temperature distribution estimation apparatus that can estimate the temperature distribution within a gas phase polymerization reaction tank with a single helical blade. The polymerization tank temperature distribution estimation apparatus comprises means for calculating the position and velocity of all of particles for each predetermined time in an agitation field by a discrete element method, means for calculating the average value of particle velocity for each time for each microelement in a reaction tank and calculating the time-mean particle velocity in each microelement, means for correcting the particle velocity for each microelement so as to satisfy a particle mass conservation formula, means for using the corrected particle velocity as an initial value of the gas-liquid velocity, means for correcting the initial value for each microelement so as to satisfy a gas-liquid mass conservation formula, means for calculating a particle enthalpy using the corrected particle velocity, the heat of reaction of particles for each microelement, and heat transfer coefficient between the particles and the gas and liquid and calculating the particle temperature corresponding to the particle enthalpy, means for calculating a gas-liquid enthalpy using the corrected gas-liquid velocity and the coefficient of heat transfer and calculating the gas-liquid temperature corresponding to the gas-liquid enthalpy, and means for outputting the calculated particle temperature and gas-liquid temperature for each predetermined time.