|
How the SF Dryer Works
1 PRE-COOLING: Air enters the dryer through the pre-cooler/re-heater, where it is cooled and dried to 15°C (59°F) PDP, removing 70% of the moisture content in the air
2 REGENERATION: Leaving the pre-cooler/ re-heater, the air enters the first heat exchanger for regeneration by removing a thin layer of frost that has accumulated on the inner walls during the previous drying cycle, reducing the moisture content to 20%. Simultaneously, the air is cooled and dried to 3°C (37°F) PDP
3 DRYING: With only 10% of the moisture remaining, the air now enters the subfreezing dryer heat exchanger where it is cooled and dried to -20°C (-4°F) PDP. The removed moisture begins to form a thin layer of frost on the inner walls of the heat exchanger.
4 HEATING: The air dried to -20°C (-4°F) PDP is reheated before exiting the dryer in two steps. First, the air reenters the upper part of the second heat exchanger and is heated by the incoming air to -5°C (23°F) while still maintaining a -20°C (-4°F) PDP
5 REHEATING: Next, the air re-enters the common pre-cooler/re-heater unit where the air is heated to 25°C (77°F) from the incoming air. The air exits the dryer with a -20°C (-4°F) PDP.
|
