Salt In Crude Online Analyzer0 pages

BASE BA-SICI
Salt In Crude Online Analyzer
(Insertion measurement probe)
The BAGGI BA-SICI is part of the BAGGI BASE®
Instruments
Series. They are
the result of
combining the
latest state-of-theart-technology
with over 50 years
of industry
experience.
The BA-SICI is
an online process
analyzer for
continuous,
reliable and
accurate
measurement of
the concentration of salt in crude oil. It is also
available for operation in an explosive atmosphere
(ATEX) environment. The measuring probe is
inserted into the oil vessel.
There are crude oils with high levels of chloride (salt)
concentration. These oils must be transported and
refined, while the high salt concentration can originate
problems if it is neglected. To use effectively the
desalters, it is necessary a quick and accurate
measurement of the concentration. This goal can be
achieved by the immediate response of an on-line
process analyzer.
The offered instrument is based upon high frequency
electromagnetic signals absorption and frequency
shift by the liquid (oil + water + salt). The antenna of a
high frequency band EM generator, inserted in the oil
tank, transmits energy into the liquid; please refer to
the figure. The resulting electromagnetic field
(modelled by the RC circuit) will change according to
the oil/water/salt content of the fluid. The dielectric
loss resistance (R in the figure) will reduce for fluid
with salt content. Due to the dipole character of water
molecules, liquid water has a very high relative
dielectric constant (C in the figure) in comparison with
dry crude oil. The measurement of the C capacity, by

TDSCS00203BR1_BASICI

the frequency shift of the EM signal, gives a value
that is function of the water and salt content. The
application software performs the temperature
compensation and all the necessary data processing
for calculating the salt concentration.

The BASE® Series embedded computer is the heart
of the system.
The computer collects the signals from the above
sensor(s) and is in charge of:
• Calculating the salt concentration
• Transmitting the concentration value over
4…20 analog mA signals
• Actuating the output relays for indicating
possible alarms
• Displaying the measurement data in a
Graphical User Interface (GUI)
• Archiving the measurement data in Microsoft
Office compatible format
• Interfacing the human operator for system
configuration and alarm reporting
When required, the analyzer is delivered in an ATEX
version.
In this case the computer, together with the power
supply, is within a pressurized enclosure provided
with a protective purge system and a Vortex cooler
(connected to the plant instrument air system).
ATEX compliance of the computer:
- II 2 G Ex px II T6
- II 3 G Ex pz II T6

page 1

B.A.G.G.I . SrL – V.le Campania,29 20133 Milano Italy – Tel. +39 02715547 – Fax +39 027490571 – baggi@baggi.com