SulphuR plant inlet h2S aciD gaS analyzeR
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the galvanic applied Sciences galvanic BRm 961-ag
Galvanic’s BRM 961-AG analyzer provides fast, accurate measurement of H2S in the
The Brimstone Sulphur UV Spectropho- sulphur inlet of acid gas stream in the Claus sulphur recovery plant. Using the state-of-
tometer product line is specially de- the-art ultraviolet (UV) spectrometer, BRM 961-AG measures the exact concentration of
signed to measure sulphur species gas H2S instantly. With this accurate real-time data, an operator can immediately optimize
for sulphur recovery and other related the sulphur balance in the process for the most cost-effective outcome. In addition,
process. Using a state-of-the-art holo- Galvanic’s BRM 961-AG advanced UV spectrometer technology maintains accuracy
graphic grating spectrometer coupled across a broad dynamic range, which allows the operator to more accurately mea-
with a 2048 pixel UV enhanced CCD sure a varying H2S concentration in the acid gas stream. Complete with an on-board
array, Galvanic’s Brimstone online computer system, the BRM 961-AG also has an easy to use graphical user interface
on the analyzer and is capable of remote access via the plant network. Galvanic’s BRM
analyzers provide accurate, real-time
961-AG is the industry’s leading fast, accurate and easy to use acid gas analyzer.
analysis of the desired sulphur species.
experienced BRm 961-ag SyStem
Over 25 years of experience. The analyzer system consists of two major functional blocks, sample handling and
analytical, which are interconnected by fibre optic cables and electrical conduits. The
established sample handling components are mounted on a panel and the analytical components
are mounted in an enclosure. The panel and enclosure are mounted on a common
Galvanic is a reliable and trusted name. tubular steel frame in a side-by-side configuration. This physical separation of the
customer Service sample handling and analytical components greatly reduces the potential for corrosion
of the electronic and electrical components from the H2S.
Our experienced field support team is
always there to meet your requirements. analytical methoDology
The 961-AG analyzer system measures the broadband absorption of H2S in the
ultraviolet (UV) region of the electromagnetic spectrum. The UV radiation is supplied
from a highly stable deuterium broadband source and is transmitted to and from the
measurement cell via UV fibre optic cables. The measurement cell is a specific optical
path length through which a sample of the acid gas flows. Light from the source is
transmitted to the measurement cell via a fibre optic cable. After passing through the
gas space in the measurement cell, it is transmitted to the spectrometer by a second
fibre optic cable. The CCD array coverts the light into electrical signals. These signals
represent the intensity of the spectral distribution within the band of interest. The spectral
data is acquired from the spectrometer by the system computer which calculates the
concentration of the H2S.
Galvanic Applied Sciences, Inc. uses a spectrometer with a grating efficiency
optimized in the spectral region where the species of interest absorb 200-400nm.
Coupled to the grating is a detection system best suited for the desired analysis in
terms of sensitivity and resolution while minimizing dark current and stray light noise.
To achieve this, a 2048 element CCD detector is employed.
The H2S concentration is output as a 4 to 20 mA analog signal. The analog signal is
isolated and may be self powered or loop powered. Remote indication of an alarm
condition is provided for by dry (potential free) form C (normally open, common,
normally closed) relay contacts.
The system computer controls the operation of the analyzer, performs the data processing
and calculation and provides the graphical user interface for the analyzer system.
The computer is mounted to the door of the analyzer enclosure. All pertinent analyzer
information and user controlled functions are presented on this display. This allows the
user to monitor the analyzer functions without opening the cabinet door.
Sample hanDling Features:
Mounted to the sample handling panel are a heated oven, pressure transmitter and all • Field proven reliability and low main-
of the necessary plumbing, fittings and valving associated with transporting the sample tenance cost
and calibration (zeroing) of the analyzer. The sample cell is located in the heated • UV H2S analyzer with fibre optic light
oven, which is typically controlled at 50°C. The system does not use an eductor or path
pump to draw sample, it depends on the pressure differential between the sample • Complete system from one supplier
point on the acid gas line and a safe, low-pressure sample return point.
• No Instrumentation house required
Materials in direct contact with the sample or calibration (zero) gases are type 316 in most weather conditions
stainless steel, anodized aluminium or, Teflon®. • Suitable for hazardous area installa-
analyzeR encloSuRe • Large dynamic range capability
The analyzer enclosure contains the system computer, data acquisition and control • Intuitive graphical user interface
system, source lamp and source lamp power supply, spectrophotometer, temperature
sensor interface module, the power control module for the electric oven heater and,
the input power and output signal termination points. This enclosure is provided with a
protective purge system and a vortex cooler both of which are connected to the plant
instrument air system.
analyzeR SyStem location
The preferred location for the analyzer is as near as practical to the sample point on
the acid gas line. A support structure to which the framework supplied with the ana-
lyzer system is mounted must be provided by the user. The analyzer system should be
protected from direct exposure to the weather.
BRM 961-AGX Acid Gas Analyzer System
Oven Back Panel - Oven Open Rev 0
BRM 961-AGX Acid Gas Analyzer System
Oven Back Panel - Oven Closed Rev 0
Auto Calibration: User Selectable Frequency
Zero Drift: < 0.25% of Full Scale Per Day (based on Auto
Zero once per hour)
Sensitivity: ± 2.0% of Full Scale
Repeatability: ± 2% of Full Scale
Response Time: Analyzer - near instantaneous
Total system – Sample Line Dependant
Size: Mounted on frame the outside dimensions are 57”L
x 41 ?”H x 16”D
Weight: Total system on frame – approx 250 pounds (varies
Control Cabinet: 30”H x 24”W x 12”D
Electrical: 110/220V - 1Ø – 50/60 Hz – 15A
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