Four Vessel
The Air separation plant shown above deploys a four bed arrangement and two stage adsorption to achieve the results shown in the following table. Energy is also saved by pre-cooling the process air with an evaporative water chiller employing waste nitrogen from the air separation plant. The chiller operates in a closed loop circuit with a direct contact aftercooler (DCAC) and only requires a small amount of water for make-up. The Chemical Design proprietary four bed design allows for a continuous flow of regeneration gas thus eliminating a sharp peak demand and the need for a heat accumulator. The electric regen heater is 50% of its normal two bed size and thermal cycling stress is greatly reduced.
Feed |
Product |
| Rate: 117,000 SCFM | Moisture: <1 vppm |
| Pressure: 100 psia | CO2: <1 vppm |
| Temperature: 95° F | Temperature: 63° F |