Turboexpander for expansion condensate gas 2

chemmobile · Jun 10, 2008

Hi

After the first mechanical separation I want to use turboexpanders for expansion natural gas in LTS (Low Temp. Separation). This is condensate gas (even C35+ are present). During expansion higher HC will condensate inside turboexpander. Can HC droplets cause damage? If it's no problem I want to ask for any information/links about manufacturers (turboexpanders).

JLSeagull · Jun 10, 2008

Mafi-Trench

http://www.mafi-trench.com/

Cryostar

http://www.cryostar.com/web/turbo-expander-clean-fuels-technology.php

Rotoflow:

http://www.turboexpanders.com/

or

http://www.geoilandgas.com/businesses/ge_oilandgas/en/our_brands/rotoflow.htm

EmmanuelTop · Jun 10, 2008

Using turboexpander assembly for gas dew-pointing is well established practice. Sometimes it is the only feasible solution - for example, when gas pressure is above cricondenbar, mechanical refrigeration cannot be applied.

Two-phase fluid in turboexpander outlet is not a matter for concern: actually it is requirement in all cases when you need to knock out heavier hydrocarbons from sales gas stream.

Best regards,

http://antwrp.gsfc.nasa.gov/apod/astropix.html

dcasto · Jun 11, 2008

The rule of thumb is no more than 15% by mass liquids in the expander outlet and no more than 5.5 ratios in pressure drop.. The expander doesn't care about what the molecule size is, but it will care if that big molecule turns to a solid!

If you want more than 15%, just expect to replace the rotating elements more often.

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Turboexpander for expansion condensate gas 2

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