The layout of adsorption dryers with heatless regeneration is clear and simple. Compared with other adsorption dryer systems, pressure dewpoints down to -90°C can be achieved without additional effort. Use in the higher pressure ranges and at low inlet temperatures causes the quantity of air needed for desorption to be reduced to an economical value. At low operating pressure the demand for already dried compressed air for purposes of desorption is increased. This causes a large proportion of the prepared compressed air to be no longer available for productive purposes. This system for drying compressed air should thus not be utilised for operating pressures of less than 5 bar. Higher inlet temperatures exert no influence on the load factor, so that solely the degree of humidity at the inlet determines the size of dryer required.
Photo 5.3.7.1
Depending on the cycle, the quantity of air enclosed in the adsorber expands upon release at regular intervals with an emission noise level of about 90-95 dB(A). Given suitable noise attenuation measures, a reduction of the noise emission level to the region of 10-15 dB(A) can be accomplished. The use of adsorption dryers with heatless regeneration is given preference in the capacity range of up to 3000 m3/h
in the higher pressure ranges
at high inlet temperatures
for installation in explosion proof areas
for use under ground
on frequently changing locations with fully pneumatic control
