TG400 Series Process Total Sulphur Analyser

Measures total sulphur in gases.

TG400 Series Process Total Sulphur Analyser

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 HS. A catalyst is used to aid conversion in some applications (optional). The resulting HS 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 HS / total S readings, alarms if any and failure indicators.

The benefits of this technology can be summarised as follows:

 

  • A continuous analyser, not cyclic
  • The instrument has a wide range capability, measuring between 0-250ppb to 0-2000ppm total sulphur
  • Configuration of the system is via a touch screen which eliminates the need to open the enclosure.
  • Single point calibration results in lower running costs
  • A compact flash card allows for remote evaluation and diagnostics
  • Suitable for gas group IIC environments.
  • Automatic regeneration of furnace
  • 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:

 

 Ethylene/Propylene plants

Reformer recycle gas

 Offshore gas production

Fuel gas monitoring

 Catalyst protection

Sour gas treatment plants

ANALYSER: 

 

 

 

Measurement principle 

:

Conversion of sulphur compounds to HS and subsequent measurement of the HS using colorimetric techniques. Complies with ASTM D4468 

 

Software 

 

:

 

C++ Windows XPe based

 

Measurement range 

:

Between 0-250 ppb to 0-2000 ppm

 

Repeatability 

 

:

 

± 2% full scale

 

Response time

 

:

 

Depends on application but typically 30secs for 0-10ppm range

 

Output 

 

:

 

4-20mA

Modbus for alarms and regeneration

 

Alarms 

 

:

 

1 x measurement alarm

 

:

1 x instrument failure alarm

 

:

Optional low flow alarm

 

:

Optional paper break/motor failure alarm

 

Area classification 

:

ATEX approved, Ex d [ia] IIC T4 

 

Ambient temperature 

:

-20°C to +40°C 

 

Tape life 

 

:

 

Up to 60 days depending on application.

 

Weather protection 

:

IP66

 

 

 

     

UTILITIES 

   

Power

:

120 / 240 VAC 50 / 60 Hz, 49VA

 

Sample 

 

:

 

Pressure 4.0 to 6.0 barg

 

:

Flow 0.1 to 0.5 l/min

 

:

Temperature 40°C max

 

 

 

Hydrogen

:

100-250 cc/min

 

Inst. Air

:

 

100-500 cc/min (for furnace regeneration)

Nitrogen

:

100-500 cc/min (for furnace regeneration) 

 

 

 

     
     

INSTALLATION 

   

Process connections

:

¼” NPT female vent, ½” NPT to atmospheric drain

Analyser vent 

:

To Atmospheric, no back pressure

Weight 

:

150 Kg

Dimensions 

:

1100(w), 1700(h), 300(d) mm