Title:
A METHOD AND AN APPARATUS FOR NGL/GPL RECOVERY FROM A HYDROCARBON GAS, IN PARTICULAR FROM NATURAL GAS
Document Type and Number:
WIPO Patent Application WO/2011/135414
Kind Code:
A3
Abstract:
A method for separating methane from at least one hydrocarbon with two or more carbon atoms in a substantially gaseous fluid (2,3), containing more than 3 ppm of water, in particular a natural gas coming from a natural gas field or from a natural gas pipeline, or a refinery gas or another gas available at an extraction pressure set between 15 and 300 bar, in particular between 35 and 150 bar, and an apparatus 500 to carry out this method. The method provides prearranging an expansion device (20) comprising at least one first expansion equipment, selected from the group comprised of: a radial expansion device (19) and a static expansion device (24), in which a first expansion takes place with a cooling effect down to a temperature that is higher than the solid formation temperature that may be formed starting from water and/or hydrocarbons present in said gas, and further comprising at least one second expansion equipment, selected from the group comprised of: a static expansion device (30) and a screw expansion device (25), which is arranged downstream of the first expansion equipment (19, 24), and where the expansion continues with a further cooling effect below the solid formation temperature, such that ice and/or hydrocarbon hydrates are formed only in the second expansion equipment arranged downstream. This way, it is possible to obtain a liquefaction of the hydrocarbons with two or more carbon atoms by means of Joule-Thomson effect even if the combustible gas contains considerable amount of water, without resorting to expensive preliminary dehydration operations.
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Inventors:
FAVILLI STEFANO (IT)
LEITEMPERGHER GIACINTO (IT)
SCIBOLA LUCIANO (IT)
LEITEMPERGHER GIACINTO (IT)
SCIBOLA LUCIANO (IT)
Application Number:
PCT/IB2011/000682
Publication Date:
January 26, 2012
Filing Date:
March 30, 2011
Export Citation:
Assignee:
SIME SRL (IT)
FAVILLI STEFANO (IT)
LEITEMPERGHER GIACINTO (IT)
SCIBOLA LUCIANO (IT)
FAVILLI STEFANO (IT)
LEITEMPERGHER GIACINTO (IT)
SCIBOLA LUCIANO (IT)
International Classes:
C10G5/06; B01D53/00; B01D53/26; C10L3/10; F25J3/06
Domestic Patent References:
| WO2009144277A2 | 2009-12-03 | |||
| WO2006070020A1 | 2006-07-06 |
Foreign References:
| US20060260468A1 | 2006-11-23 |
Attorney, Agent or Firm:
CELESTINO, Marco (Viale Giovanni Pisano 31, Pisa, IT)
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