DualSulf Process Total Sulphur and H2S Analyser
Measures both total sulphur and H2S in gases.
Duty: To measure the concentration of both H₂S and total sulphur simultaneously in a process gas stream.
The metered process sample is split into two arms. One arm is directed to a detection module where the H₂S is measured using interference free ASTM approved tapes.
The second arm is mixed with a continuous flowing stream of hydrogen. The mixed gases are heated together in a reducing furnace at a temperature between 650-1050°C (depending on application), where the sulphur compounds are converted to H₂S. A catalyst is utilised in the furnace to aid conversion in some applications. The resulting H₂S is measured using interference free ASTM approved tapes.
Since the patented catalytic element is self-regenerating, there is no need for manual or automatic regeneration of the furnace. No carbon build-up occurs in normal operation, even in the presence of unsaturated hydrocarbons.
The local LCD display provides the current H₂S / total S readings, alarms if any and failure indicators.
The benefits of this technology can be summarised as follows:
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· Separate channels for both H₂S and total sulphur, reducing capital expenditure · The instrument has a wide range capability, measuring between 0-250ppb to 0-2000ppm total sulphur · Self-regeneration of catalyst reducing downtime. |
- Configuration of the system is via a touch screen which eliminates the need to open the enclosure.
- Both measurements are made simultaneously, not sequentially as with other manufacturers
- A compact flash card allows for remote evaluation and diagnostics
- Suitable for gas group IIC environments.
- Dual stream capability
With its wide-ranging ability to measure total sulphur in gases from % levels down to ppb levels, the TG400 range of Total Sulphur process analysers can be utilised in many process industries, including:
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Ethylene/Propylene plants |
Reformer recycle gas |
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Offshore gas production |
Fuel gas monitoring |
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Catalyst protection |
Sour gas treatment plants |
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ANALYSER: |
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Measurement principle |
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Conversion of sulphur compounds to H₂S and subsequent measurement of the H₂S using colorimetric techniques. Simultaneously, the H₂S in the process stream is also measured. |
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Software |
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C++ Windows XPe based |
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Measurement range |
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Between 0-250ppb H₂S to 0-2000ppm H₂S/total sulphur |
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Repeatability |
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± 2% full scale |
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Response time |
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Depends on application but typically 30secs for 0-10ppm range |
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Output |
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2 x 4-20mA Modbus for alarms and regeneration |
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Alarms |
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1 x measurement alarm |
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1 x instrument failure alarm |
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Optional low flow alarm |
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Optional paper break/motor failure alarm |
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Area classification |
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ATEX approved, Ex d [ia] IIC T4 |
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Ambient temperature |
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-20°C to +40°C |
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Tape life |
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Up to 60 days depending on application. |
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Weather protection |
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IP66 |
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UTILITIES |
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Power |
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120 / 240 VAC 50 / 60 Hz, 49VA |
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Sample |
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Pressure 4.0 to 6.0 barg |
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Flow 0.1 to 0.5 l/min |
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Temperature 40°C max |
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Hydrogen |
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100-250 cc/min |
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Inst. Air |
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100-500 cc/min (for furnace regeneration) |
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Nitrogen |
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100-500 cc/min (for furnace regeneration) |
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INSTALLATION |
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Process connections |
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¼” NPT female vent, ½” NPT to atmospheric drain |
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Analyser vent |
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To Atmospheric, no back pressure |
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Weight |
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150 Kg |
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Dimensions |
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1100(w), 1700(h), 300(d) mm |
