Easy to Use Rapid Response
Low Operation Costs
Sulfur plant tail Gas Analyzer
Low Maintenance Cost
Easy to Use
Rapid Response
Galvanic’s Model 943-TGX Analyzer System delivers the solution to industry’s need for fast, accurate, reliable and
economical modified-Claus sulfur process control. Unique
technology coupled with over 25 years of experience in
sulfur plant process testing, process troubleshooting and
process control instrumentation are forged together in the
design of this superior product. Capitalizing on the advances in
microprocessor, radiation lamp, detector and fibre optics
technologies, Galvanic engineers and produces the
943-TGX, the industry’s leading tail gas analyzer system.
This system enhances the proven ultraviolet absorption
technology and eliminates the need for heat-traced lines. The
sample lines have been replaced by a jacketed, steam heated
sample nozzle. This enables the analyzer system to be close
coupled to the tail gas duct. The Sulfur vapour reduction
condenser and the sample cell are at the sample point with the
ultraviolet light being transmitted to and from the sample cell
via optical fibres. Eliminating the heat traced lines and using
computer control has greatly reduced the maintenance
required and the time required to perform the routine preventive
maintenance. The analyzer system consists of two major
functional blocks, sample handling and analytical, each housed
in its own enclosure and interconnected by fibre optic cables,
electrical and pneumatic conduits. The enclosures are mounted
on a common tubular steel frame in a side-by-side configuration.
Cabinet purge
Vortec cooler
IS barriers
Source lamp &
Source lamp
power supply
Sample cell
c/w aspirator
specially designed to measure sulfur species gas for sulfur recovery and other related processes. Using a holographic grating
spectrometer coupled with a 2048 pixel UV enhanced CCD array, Galvanic’s Brimstone online analyzers provide accurate,
real-time analysis of the desired sulfur species.
No sample line
Direct connection to process line
Fibre optic light path
No optical filters and no moving parts
Intuitive graphical user interface
No analyzer house required
Flexible installation for most process pipe
Field proven reliability and low maintenance
Self-diagnostic and self preservation features
Automatic zero
I/O board
Suitable for hazardous area installation
Output signal
Interface flange
Input power connections
The analytical method employed in the 943-TGX is
ultraviolet absorption spectroscopy. The analytical portion of
the system consists of a deuterium source lamp, a measurement (sample) cell, and a spectrophotometer with a 2048 pixel
CCD array as the ultraviolet light detector. The sample cell is a
specific optical path length through which a sample of the
tail gas flows. Light from the source is transmitted to the
sample cell via a fibre optic cable. After passing through the gas
space in the sample cell, the residual light is transmitted to the
spectrometer by a second fibre optic cable. The CCD array
converts the light into electrical signals, that represents
the intensity of the spectral distribution within the band of
interest. The computer calculates the concentrations of the
principal reactants (H2S and SO2) and the combustion air
control signal - air demand.
Contained within the sample handling enclosure is a heated
oven and all of the necessary plumbing and fittings associated
with drawing a sample and calibration (zeroing) of the
analyzer. The sample probe assembly interface, the sample and
sample vent shut off valves, the sample cell and the air driven
eductor for drawing a sample are located in the oven. The oven
temperature is controlled at 150°C to maintain the temperature
of components above the Sulfur dew point. The oven is equipped
with both steam and electric heaters. The steam heater
provides bulk heating of the oven and the electric heaters are
used to control to the set point temperature. Materials in direct
contact with the sample or calibration (zero) gases are type 316
stainless steel or anodized aluminum.
The analyzer enclosure contains the display, controller, I/O
board, source lamp and source lamp power supply, spectrometer, temperature sensor interface modules, the power control
module for the electric oven heaters, and the input power and
output signal termination points. This enclosure is provided
with a protective purge system and a vortex cooler, which are
connected to the plant instrument air system.
The design of the sample probe is such that sample is drawn
from near the mid point of the process duct and returned to the
wall of the process duct. The sample is returned to the process
through the annular space between the sample probe and the
sample nozzle. An air-cooled Sulfur condenser for the reduction
of entrained liquids and Sulfur vapour is integrated into the
sample probe. Sulfur collected on the cooling tube of the
Sulfur condenser is hydrostatically returned to the process
duct. The sample probe is inserted into the tail gas duct
through the jacketed sample nozzle from inside the sample
handling oven. Installation of the sample probe takes place
after the analyzer has been installed.
The preferred location for the analyzer is directly over top of
the tail gas duct. As an alternative, the analyzer may be located beside a vertical run of the tail gas duct in which case
the jacketed sample nozzle must be mounted to the tail gas
duct at an angle of 20° with respect to the vertical. A support
structure to which the framework supplied with the analyzer
system is mounted must be provided by the user. The analyzer
system cannot be mounted using only the sample nozzle.
The Galvanic Applied Sciences Leadership continues The Brimstone Sulfur UV Spectrophotometer product line is
Sulfur recovery tail gas
Claus process
Claus with tail gas cleanup
Claus with oxygen enrichment
Instrument Specifications Continued...
Auto Zero: Power Consumption:
1100 W
0 °C to 50 °C
User Selectable Frequency
Zero Drift: <0.25% of Full Scale Per Day (based on
Auto Zero once every four hours)
Accuracy: Measurement of the Tail Gas stream:
±1% H2S Full Scale; ±1% SO2 Full Scale
Air Demand calculated from the measured
H2S and SO2
Sample Flow: Typically less than 5 SCFH
Area Classification: Class I Division 2 Groups C & D T3
Sensitivity: H2S reading ±1% Full Scale
SO2 reading ±1% Full Scale
Electrical: Linearity: H2S ±1% Full Scale
SO2 ±1% Full Scale
Instrument Air: 22 SCFM at 80 psi (maximum case with
vortec cooler at 20SCFM)
Repeatability: ±1% of Full Scale (with all species present)
Response Time: Analyzer - near instantaneous
Total system – typically less than 10 seconds
100/240V - 1Ø – 50/60 Hz – 1100W
Steam: Two supplies required
Nozzle – 50 psi
Oven Heater >150 psi
Digital: 12-24VDC
Externally Powered:
Remote Zero
Operating System: QNX RTOS
Processor: INTEL Atom Z510 running at 1.1 GHz
Volatile: 512MByte RAM
Non-Volatile: Primary Solid state drive – 512 MB
Secondary Solid state drive – 1 GB
(up to 8 GB optional)
HMI (Human Machine Interface)
Display: 5.7 INCHES 640 X 480 VGA
TFT LCD with 262,144 colors and LED
Keypad: GASI intrinsically safe with 20 keys
Software: Web based GUI via Ethernet
Analog: Four 4-20mA outputs, isolated, loop powered
Air Demand, H2S, SO2 with output 4 user
selectable as Air Demand, H2S, SO2, H2S + SO2,
COS Ratio (H2S: SO2)
All outputs 16 bits with built in track and hold
Relay: 4-Form C Contact 8 A 300 VAC / 250 VDC
Normal / Fault
Control Mode ( manual/auto)
Communication Ports
Ethernet 1: SCADA: 10/100/1000 Mbit with auto
MODBUS TCP compliant and HTTP for GUI
Instrument Specifications
Ethernet 2: Size: Overall outer dimension (including
mounting frame)
431/4”H x 57”Wx16”D
Direct connect to lap top for web GUI 38.4K
Enron, Modicon 16, Modicon 32
Baud Rate 1200, 2400, 9600, 19.2K, 57.6K
Analyzer Cabinets: Two cabinets each 30”H x 24”W x 12”D
REV August 2011
Weight: Total system on frame – approximately
275 pounds (varies with options)
7000 Fisher Road SE, Calgary, Alberta T2H 0W3
Tel: 403-252-8470 Fax: 403-255-6287 Email: info@galvanic.com
Subject to change without notice
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