8
Rotor
Wet air outlet
Regeneration
air fan
Process-air
inlet
Dry air outlet
Rotor motor
RECUSORB
is a continuous dehumidifier with internal energy recovery and able to
reach very low dew points. During regeneration, sensible heat is adsorbed by the rotor
material. This heat is transferred to a purge sector where the incoming regeneration
air is preheated and its moisture content reduced. While less heat is now required to
reach the final regeneration temperature, the air will also be at a much lower rela-
tive humidity. As a result of this, the dry air outlet is both cooler and drier than that
achieved by other desiccant systems.
Regeneration heater
Process air fan
FIGURE 1: Principle of Operation
2 General Description
2.1 Applications
DST desiccant type dehumidifiers are normally used
where dry air is essential to the various manufacturing
processes used in chemical, pharmaceutical, food or
confectionery industries, or where a dry environment is
required for storing and handling of moisture sensitive
products and raw materials.
The well proven air drying technology using the
adsorption principle provides great flexibility in solving
humidity problems. It offers the user independent
humidity control, down to dew points far lower than the
effective operating range of refrigeration dehumidifiers.
2.2 Construction
The standard dehumidifiers are made as complete
units including rotor, fans, rotor motor and rotor drive
transmission, heater for the regeneration, controls and
electrical equipment.
The regeneration heater is normally electric, but steam,
hot water or gas-heater is available as option.
The water vapour is effectively adsorbed from the
treated air in the SSCR silica gel rotor.
2.3 Principle of operation
It works on a continuous process with two air streams
of different flow rates, normally having a flow ratio of
approximately 3 to 1. The greater flow,
process air,
is dried as it passes through the dehumidifier, while
the smaller flow,
regeneration air
, is used to heat the
rotor material to drive the adsorbed moisture vapour
from the desiccant. The moisture which is removed
from the process air, is transferred over to the other
as the SSCR rotor turns slowly.
Cooke Industries - Phone: +64 9 579 2185 Email: sales@cookeindustries.co.nz Web: www.cookeindustries.co.nz
