EXPERIMENTAL AND SIMULATED STUDY OF A HYDROTHERMAL OXIDATION REACTOR: UNSTEADY REACTOR BEHAVIOUR AFTER A REACTOR STOP

摘要

The scaling up of Hydrothermal oxidation (HOT) facility depends on the development of simulation tools. In this way, we propose a new approach to simulate the reactor thermal behaviour during a emergency stop of the unit. A numerical procedure of non stationary temperature profile simulation in the reactor is described in order to predict the reactor thermal behaviour. This new model is validated from experimental data obtained with a quasi-adiabatic reactor, which allow to follow the temperature profile evolution along the reactor during the HOT process. Performances of numerical procedure are tested with simulation of a real non stationary conditions: pump defect. The simulations give evolutions of temperature profiles of reactive mixture versus time and external wall temperature of reactor tube versus time. These simulations show that the HOT reactor thermal operation can be considered as stable and sure during a emergency pumps stop.