The Delair® DB compressed air dryers use porous materials (desiccants) to adsorb water molecules from the compressed air. Periodically, the desiccant is regenerated (adsorbed water driven off) for re-use.To allow continuous operation, two desiccant towers are used, one adsorbing moisture while the other is being regenerated. For regeneration, heated ambient air is used instead of expensive purge air to desorb moisture from the regenerating bed. No purge loss means Dryer “in” is dryer “out”.No purge air loss and no dewpoint peak; Regeneration is carried out by means of heated ambient air. Therefore no purge air is used, so dryer “in” is dryer “out”. Pressure dewpoint and outlet temperature of the dried compressed air will not exceed the specified conditions (no peaks during switch-over), due to Delair’s regeneration system, co-current cooling and parallel drying.
Pressure drop below 0.1 bar; Due to the unique design of the compressed air dryer, i.e. vessels, piping, strainers and butterfly valves, this type of dryer has a pressure drop below 0.1 bar.
Low power consumption - The adsorbers and the regeneration heater are insulated so that the heater achieves optimum energy efficiency. The regeneration of the air dryer is thermostaticaaly ended. The electrical energy consumption is matched to actual moisture loading of the desiccant. As the required heat for regeneration is equally distributed over the desiccant bed, no “hot spots” can occur, and excessive aging of the desiccant will be avoided.
Energy savings/Dewpoint change-over The Delair® DB compressed air dryer has a tower change-over after 6 hours of drying. Alternatively, the change-over can be based on dewpoint measurement. When the dryer is not operating at maximum conditions, this will result in an extension of drying time and a considerable reduction in the energy consumption. This dewpoint analyzer fitted to the air dryer monitors the dewpoint of the dried compressed air and in addition provides a 4-20 mA alarm signal for remote monitoring.
