Explosives Destruction System's Drum Filter. Part 2. Simulation

Operating conditions for the Explosive Destruction Systems EDS drum filter including temperature, flow rate and humidity, based on operator logs and other studies, are documented here. The vapor phase feed concentration data has not historically been recorded for EDS operation, so estimated values based on either worst case assumptions or liquid phase equilibria relationships arc used. A simulation breakthrough model is shown to provide excellent agreement with the experimental results of the EDS validation study. The efficiency of the two-layer. silica-ASZMT carbon at the nerve agent toxicity level, 0.0001 mgm was demonstrated experimentally in that report but was not studied for an all silica bed. A worst case condition was selected corresponding to the vessel vapor equilibrated at 80 of agent GB saturation. The simulation was then used to predict performance for the baseline bed of, 50 of the total bed length, of adsorbents silica and ASZMT equivalent of 8 and 14 continuous MEA and GB ventings, respectively. When this more realistic series of steps is simulated at worst case conditions using a full length of all silica gel only, a minimum of 13 MEA wash cycles can be retained without any elution of chemical agent.