Claus Gas Analyser The Claus Technology...

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Claus Gas AnalyserThe Claus Technology...
... is the world's most significant gas
desulfurizing process, recovering elemental
sulfur from gaseous hydrogen sulfide.

• Raw Materials and Products
• Gases with a H2S content of over 25 are
  suitable
• for the recovery of sulfur in Claus plants.
• These gases may also contain hydrogen cyanide,
• hydrocarbons, sulfur dioxide or ammonia.
• They mainly originate from physical and
• chemical gas treatment units (Rectisol,
  Purisol
• and amine scrubbers) in refineries,
  gasification
• or synthesis gas plants.
• The sulfur recovered in Claus plants is used
• for manufacturing medicine, cosmetics,
  fertilizers
• and rubber products.

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Claus Gas Analyser Applications in Manifold
Processes
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Claus Gas Analyser Process Flow Diagram of
Claus-Process
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Claus Gas Analyser Process Flow Diagram of
Claus-Process
Isothermal Step 2 H2S3/2 O2 SO2 H2O
2 H2SS02 3/2 S22 H2O
H2S gt 25 .
gt 850 C
Ratio 2 1 IMPORTANT
T control
Cooled to liquid S
Other reactions CO2H2S
COSH2O CO1/2S2 COS COSH2S
CS2H2O
Accurate dosage important !
60-70 output of S
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Claus Gas Analyser Process Flow Diagram of
Claus-Process
Catalytic Step Activated Alumina 1. Heating 2.
Catalytic reaction 3. Condensation H2SSO2
3/6 S62 H2O H2SS02 3/8 S82 H2O
205 to 230C
1.2.
3.
130 to 170C
Further step either burning or desulphurization
downstream
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Claus Gas AnalyserProcess Points of Interest
Feed acid gas H2S
Entrance of Catalytic Convertor H2S - SO2
Emission gas after incinerator SO2 - CO - H2S
- NO
Analysis for enhanced Claus processes O2
Tail Gas Analysis H2S - SO2 - H2O - N2 - COS -
CO2
At sulfur pit H2S
Air (partial)
To Incinerator
C
PGC
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Claus Gas Analyser Tail Gas Analysis for Process
Optimisation
For proper control of a Claus process , the
hydrogen sulphide ( H2S ) and sulphur dioxide (
SO2 ) must be measured in tail gas. Major
problem Sample gas is saturated with sulfur
vapour Plugging of sample lines and
analyzer Further problem Due to the
presence of CO2 and HC, COS and CS2 will be
formed. Concentrations difficult to
predict Depending on changing of CO2 and HC
concentration Changing of burner
temperature. CO2 and CS2 interfere UV
analysis of SO2 and H2S.
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Claus Gas AnalyserOur Solution...

• Process Chromatography
• PGC302 Edition II Claus
• based on...
• Standard Process Chromatograph
• with some specialties..
• Second hot oven
• for sample conditioning system
• Safety back-purge unit
• Installation on top of the process line

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Claus Gas AnalyserDouble Oven System
Right Oven Chromatograph Sample
injection Pre-separation column Backflush Fin
al separation TC-Detector Variable applications
possible according customers requirements
Left Oven Sample conditioning system Sulphur
trap and fastloop Air jet pump Back-purge
system Calibration
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Claus Gas AnalyserPGC Tubing...Gas Flow during
Process Run
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Claus Gas AnalyserPGC Tubing...Gas Flow during
Calibration
Closed
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Claus Gas AnalyserPGC Tubing...Gas Flow during
Purge
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Claus Gas AnalyserThe Chromatogram
H2S SO2 on demand H2O ( 3 Min Cycle )
H2S
SO2
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Claus Gas AnalyserExtended Analysis...
N2 0-100 CO2 0-20 H2S 0-2 COS 0-1 SO2 0-1 H2O
0-10 H2S - SO2 ratio is calculated
H2S
N2
SO2
COS
H2O
CO2
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Claus Gas Analyser Steam Heated Sample Lines
Tube - in - tube technology Sample 6mm
OD Steam 10mm ID Shut off valves Steam
jacketed
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Claus Gas Analyser Our Worldwide References
... more than 30 chromatographs in the field
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Claus Gas Analyser Our Competitors
Advantages Fast Analysis (T9010s) Fast Analysis
(T905s)
Manufactorer AMETEK BOVAR ABB and others
Principle UV-Diodenarray-Spectrometer NDUV
Spectrometer GC
Disadvantages Interference by elem. S UV Optic
covered by S film Interference by elem. S UV
Optic covered by S film less experiences with
sample conditioning system
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Claus Gas Analyser Where are our Customers...
Endusers
Licensors
Clauspol - IFP North
America Clinsulf-SDP - Linde OxyClaus
- Lurgi Oil Gas OxyClaus
- The Pritchard Corp. SuperClaus -
Stork Sure - BOC Gases Sure
- Parsons Paques / Thiopaq -
Shell Paques / Thiopaq - DuPont
Engineerings
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Claus Gas Analyser Our Benefits ... Our
Advantages

• Proven technology with high reliability, long
  term stability, many references
• Safe protection Backpurge to clean analyzer and
  sample lines in case of any problem
• with low temperature, power failure.. As well as
  during maintenance works.
• Easy operation , remote operation
• Easy maintenance , less frequently
• No UV-lamp, longer stability, no expensive spare
  parts regularely needed
• No interference by sulfur, COS CS2 using
  chromatographic separation
• Comprehensive self diagnosis
• Extended analysis possible N2 CO2 COS H2O
• DCS-coupling using MODBUS
• Network with other PGCs on plant
• Good value for money