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A relaible SO2 gas analyser

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6748

6748

Chemical
Nov 18, 2002
23
Sulfur dioxide is the product for this plant and is made by burning Sulfur with air having a dew point lower than MINUS 60 Deg C.

A reliable SO2 gas analyzer is needed for measuring the composition of SO2 gas in
a)Vent stream. Range 0 to 5000 ppm v/v% (Temp 20 to 50 Deg C)
b)Process gas stream from the sulfur furnace .
Range:: 0 to 15 % SO2 v/v%
Temp.:: 1500 Deg C OR 300 Deg C or 250 Deg C ( With traces of SO3)
OR after a acid spray at 50 Deg C with traces of acid fumes and supposed to be free of SO3.
(Process gas is cooled in stages and hence is available at all these temps.)
Will someone suggest a reliable technology or method by which the gas analysis can be done? The second part of the query is how to analyze for the traces of SO3 that may be present in the process gas.
 
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6748

H2S and SO2 are encounterd in the petroleum industry too. You may want to consider posting in the "Petroleum Engineering" forum too.

 
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UV analyzers are the most commonly used. There are several suppliers to choose from.

Your best sample location is right before in the stack. Run a hot sample chamber to minimize condensation or use an insertion rather than extractive measurement. You must be using a wet scrubber system for your stack, 20-50 deg c is pretty low.

Would recommend avoiding measurements in the burner or after your waste heat boiler. You can't afford the headache or the expense. You can always take grab samples around your converter. In fact there are a number of companies that perform plant surveys with a portable analyzer.

There are manual tests for SO3 mist but no analyzer. The last manufacturer that tried it destroyed his lab equipment. Evidently his budget people refused to replace his equipment, he wasn't interested in a second test for us and was still rather emotional about it.


 
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