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CASE HISTORY

SCAE: Automation

for Oil&Gas packages

Evolved and innovative
Automation for Oil & Gas packages.
Unit control panels
with redundant PLC
and preventive diagnostics

which the amount of moisture presented can no
longer be contained and some of the moisture
will condense and drop out. This temperature is
called the dewpoint.
The principle of the adsorption dryer (Regene-
rated by Air) is to decrease the dew point and is
based on the physical property of the desiccant
to absorb water vapor.
The compressed air must therefore be treated to
prevent subsequent problems from occurring in
compressor installations.
So, this project concerns the automation of a
Roberto Manzoni, Manager of the Systems and package consisting of two heated dryers (two
Automation Department, SCAE vessels for each dryer) connected in parallel, in
Master / Standby mode.

ir compressor systems are used in
all industries and in all plants using The project:
control valves, and have been instal- Performance and Control
led in all Oil & Gas plants. This sy-
stems supply dry compressed air to The two heated dryers are individually composed
Aan instrument air network, that feeds of two prefilters, two vessels, a heater with its blo-
the control valves and in particular the ESDV emer- wer and two postfilter. Each Dryer can be used
gency stop valves. separately in manual or together in an automatic
Compressed air systems consist of a supply-side, cycle (Master/ Stand-by mode) and this mode can
which includes compressors and air treatment, and be managed from the operator with an easy and
a demand side, which includes distribution and clear selection from the Unit Control Panel.
storage systems and end-use equipment. The electrical cabinet that controls the packages
When air has been compressed and leaves an has been entirely designed and built from SCAE,
aftercooler and moisture separator, it is typi- following each exigency required from the end-user,
cally saturated because Atmospheric air con- starting from the material of the cabinet, through
tains moisture. The higher the air temperature, each certification required and ending through the
the more moisture the air is capable of holding. advanced automation demanded from the critical
When air is cool, it will reach a temperature at point of the end-user-site.

62 62 Impiantistica Italiana - Gennaio-Febbraio 2021