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Claus Gas Analyser The Claus Technology...

Claus Gas Analyser The 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 H 2 S content of over 25 % are suitable for the recovery of sulfur in Claus plants.

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Claus Gas Analyser The Claus Technology...

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  1. 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.

  2. Sour gas from natural gas fields Sour refinery gas Sour water stripper gas Sour gas from chemical plant Sour gas from salt production plant Sour gas from coal gasification Claus Gas AnalyserApplications in Manifold Processes

  3. Claus Gas AnalyserProcess Flow Diagram of Claus-Process

  4. Claus Gas AnalyserProcess Flow Diagram of Claus-Process Isothermal Step 2 H2S+3/2 O2 SO2 + H2O 2 H2S+S02 3/2 S2+2 H2O H2S: > 25 %. > 850 °C Ratio 2 : 1 IMPORTANT T control Cooled to liquid S Other reactions CO2+H2S COS+H2O CO+1/2S2 COS COS+H2S CS2+H2O Accurate dosage important ! 60-70 % output of S

  5. Claus Gas AnalyserProcess Flow Diagram of Claus-Process Catalytic Step = Activated Alumina 1. Heating 2. Catalytic reaction 3. Condensation H2S+SO2 3/6 S6+2 H2O H2S+S02 3/8 S8+2 H2O 205 to 230°C 1.+2. 3. 130 to 170°C Further step either burning or desulphurization downstream

  6. 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

  7. Claus Gas AnalyserTail 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.

  8. 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

  9. Claus Gas AnalyserDouble Oven System Right Oven Chromatograph Sample injection Pre-separation column Backflush Final separation TC-Detector Variable applications possible according customer´s requirements Left Oven Sample conditioning system Sulphur trap and fastloop Air jet pump Back-purge system Calibration

  10. Claus Gas AnalyserPGC Tubing...Gas Flow during Process Run

  11. Claus Gas AnalyserPGC Tubing...Gas Flow during Calibration Closed

  12. Claus Gas AnalyserPGC Tubing...Gas Flow during Purge

  13. Claus Gas AnalyserThe Chromatogram H2S SO2 on demand : H2O ( 3 Min Cycle ) H2S SO2

  14. 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

  15. Claus Gas AnalyserSteam Heated Sample Lines Tube - in - tube technology Sample : 6mm OD Steam : 10mm ID Shut off valves : Steam jacketed

  16. Claus Gas AnalyserOur Worldwide References ... more than 30 chromatographs in the field

  17. Claus Gas AnalyserOur Competitors Advantages Fast Analysis (T90=10s) Fast Analysis (T90=5s) 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

  18. Claus Gas AnalyserWhere 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

  19. Claus Gas AnalyserOur 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

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