PROCESS
ANALYZERS,
SERVICE &
CONSULTING

 


MODEL TGA 942 CE

 TAIL GAS ANALYZER

FOR CLAUS SULPHUR RECOVERY UNITS

TO ANALYZE THE H2S/SO2-CONCENTRATION


UV-spectrophotometer

Ideal for:
·  Process feed back control
·  H2S, SO2, jS or COS measurement
·  All Claus Plant configurations
           including Coke Oven Plants
·  All Tail Gas Clean-up Processes
·  All possible sample points anywhere
         down-stream of the Reaction Furnace
·  H2S/SO2 ratios from 1:20 to 20:1 and greater
 


General:
·  Low installation cost
·  No expansive shelter required
·  User and service friendly modular design 

Sample System:
·  Reliable and trouble free due to controlled sulphur condensation prior to sample extraction
·  No Sample Lines, close coupled mounting and low volume 
à  extreme fast response
     (3…5 sec. typical)
·  Hermetically separated from electronics/ optics (fibre coupled)

 Spectrophotometer:

·  Full spectrum analyses with high wavelength resolution
·  Excellent cross-interference compensation for high accuracy measurements under real process conditions
·  High linearity; Wide dynamic range
·  Extreme over range capability
·  Interference free from CS2
·  Active measurement and compensation of COS and Sx background
·  No moving parts, no optical filters
·  Easy handling due to self explaining display
·  Extensive self diagnostic built in
 

Technical Data

Electrical Classification

EEx p ib (ia) m e IIB T3   Cert.No.: TÜV 00 ATEX 1616                or

General Purpose according IEC/VDE
Packaging according to North American Standards

Power Supply

1/N/PE ~ 50/60 Hz  230 V   or  115 V

Power Consumption

1200 Watt

Protection

IP 65 according  IEC 529  DIN 40 050

Instrument air or
another inert gas

Dew point   -40 °C (-40 °F)

Pressure: 5.5 ...     7 barg             
                550 ... 700 kPa                         

Flow:   3,4 m³/h normal
25 m³/h at short intervals

To comply with ANSI/ISA                S7 – 3 – 1975 R/1981

Steam Supply

8.0 ... 12.0 barg for the analyzer Oven heater

3.5 ...  4.5 barg for the Analyzer Nozzle

SIGNAL OUTPUTS

 

Analog

4 ... 20 mA per measuring channel, updated once per second,
isolated to 250 Vrms , self- or loop powered, load < 1000
W,
Available live or track and hold

Output signals linear to concentration:

1. Hydrogen Sulphide H2S       0 … 0,5   to   0 ... 10 vol %                   
2. Sulphur Dioxide      SO2        0…0,25   to   0 ...  5 vol %

Calculated output signals:

3. Air Demand                          -5 ...  0 ... +5 % Combustion Air
    according to                           4 ... 12 ... 20 mA
4. Sigma Sulphur                        0 ... 3 vol %

Digital

Potential free SPDT relay contacts. Isolated to 250 Vrms
The operational status outputs:         STATUS (Fault/Normal)
                                                          SERVICE (Warning/Normal)
                                                           MODE (Calibrate/Run)
                                                           CONTROL (Manual/Auto)

Display

Flat Paned Industrial PC c/w 12” TFT screen

Material in sample contact

Stainless steel, high purity aluminum or PTFE

Source

Highly stable deuterium broad band lamp

Detector

Spectrometer with a 2048 element CCD array detector

Accuracy

Measurement at the Tail Gas Stream:

± 1 % H2S      F.S.

Measurement at the Tail Gas Stream: 

± 1 % SO2      F.S.

Presentation of the “Air Demand”

Calculated from H2S and SO2

Speed of response T90

Typical 5 seconds

Warm up time

< 90 minutes, stable after 2 hours

Repeatability

± 1.0 % F.S.

Sensitivity

H2S – reading  ± 1.0 % F. S.

SO2 – reading  ± 1.0 % F.S.

Zero drift 

0.25 % F.S. in 24 hours Based on Auto Zero every four hours.

Calibration

H2S, SO2  and COS outputs factory calibrated.
Air Demand Signal calculated from H2S and SO2

Sample flow

80 Liter/h

Sample transport

Air – or Nitrogen aspiration

Weight

175 kg

 This Analyzer is based on BRIMSTONE Technology.

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