Measures total sulphur in gases.
Duty: To measure the concentration of total sulphur in a process gas stream.
The metered process gas is mixed with a continuous flowing stream of hydrogen. The mixed gases are heated together in a conversion furnace at 850°C, where all the sulphur compounds are converted to H₂S. A catalyst is used to aid conversion in some applications (optional). The resulting H₂S is measured using interference free ASTM approved colorimetric techniques.
The analyser is equipped with an automatic regeneration system to remove any build-up of carbon in the furnace tube.
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:
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:
Ethylene/Propylene plants |
Reformer recycle gas |
Offshore gas production |
Fuel gas monitoring |
Catalyst protection |
Sour gas treatment plants |
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. Complies with ASTM D4468 |
Software |
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C++ Windows XPe based |
Measurement range |
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Between 0-250 ppb to 0-2000 ppm |
Repeatability |
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± 2% full scale |
Response time |
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Depends on application but typically 30secs for 0-10ppm range |
Output |
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4-20mA Modbus for alarms and regeneration |
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 |
Area classification |
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ATEX approved, Ex d [ia] IIC T4 |
Ambient temperature |
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-20°C to +40°C |
Tape life |
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Up to 60 days depending on application. |
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 |
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 |
Inst. Air |
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100-500 cc/min (for furnace regeneration) |
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 |
Analyser vent |
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To Atmospheric, no back pressure |
Weight |
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150 Kg |
Dimensions |
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1100(w), 1700(h), 300(d) mm |