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Water Injection in Sour Gas Stream

Water Injection in Sour Gas Stream

Water Injection in Sour Gas Stream

(OP)
Does anyone have any experience with injecting water into a sour gas inlet stream to help knock out soaps and other contaminants? And is it better to place the injection point in the piping just prior to the Coalescer filter to ensure total gas stream coverage or in the Coalescer filter itself?

RE: Water Injection in Sour Gas Stream

Injecting into the piping prior to the coalescer is the way I have seen it.  Make sure that you are using DI water or steam condensate to prevent contamination of downstream processes from impurities in raw water.

I have also seen in some cases that the corrosion inhibitors and other production chemicals have coated the coalescer elements, effectively narrowing the passageways through the coalcer making them completely ineffective (too high of a resultant velocity through the element).  The thought was that the gas stream was not wet enough to coalesce, so water was injected into the flow.  This amplified the problem because the result was more contamination into the process.

Andrew Lechelt
Technical Support Engineer
Quadra Chemicals
www.quadrachemicals.com

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