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Power-User

Join Date: Apr 2006
Location: Texas, by God! Houston for precision
Posts: 167
Good Answers: 2

Flare gas co-gen

01/03/2007 3:51 AM

Why not? I live in Houston Texas and can't sleep some nights because of the light from the damn flare stacks. Surely some return on the waste energy is better than none. I've done cost/benefit analysis that says that even as a steam turbine preheat loop it makes sense, but my buddies at the site just say "we can't do it". Is this government stupidity, or corporate cupidity, or (lost rhyme thread). The late Admiral RAH got pissed every time he saw a sawmill burning off slash; it pisses me off to see the same waste of BTUs.

Convince me that it makes sense and I'll buy you a beer.

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Safety - Hazmat - PHA / HAZOP Facilitator Engineering Fields - Chemical Engineering - Principal Engineer Engineering Fields - Piping Design Engineering - Chemical Process Engineer

Join Date: Mar 2006
Location: Billings, MT, USA
Posts: 54
#1

Re: Flare gas co-gen

01/03/2007 11:59 AM

I used to live in Houston (9 years) and agree with you. I did many projects for those refineries and mentioned that to the on-site process engineers. The only answer I got was that the fuel in those stacks was typically not steady enough to properly run a reliable burner.

Now, to me anyway, that sounded like a good excuse to not actually engineer a solution. I always thought that with a knock-out drum (which most flares have anyway) and some sort of compressor with the ability to by-pass, one could put together a system that would use those wastes as fuel.

It would of course require some way to bypass the entire thing for an emergency release - which is the point of most of those systems. As I think about it, this might be the Achilles of this problem. How to you have an absolutely reliable venting / release point for an emergency if you are trying to collect and burn those small flows (relative to an emergency release) that we typically see flaring at night.

I hope you find a good answer here, because this problem is not just restricted to the Houston area, but to all refineries and to many other facilities as well.

Stephan

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