公开(公告)号：EP2467568B1

公开(公告)日：2013-09-18

申请号：EP11743605.5

申请日：2011-03-29

申请人： Sime S.r.l.

发明人： FAVILLI, Stefano ,  LEITEMPERGHER, Giacinto ,  SCIBOLA, Luciano

IPC分类号： E21B41/00 ,  F03B13/10

CPC分类号： E21B41/0085 ,  F01D15/00 ,  F02C1/00 ,  F02C1/02 ,  F03B13/10 ,  F03G7/04 ,  F05B2220/602 ,  F05D2220/62 ,  F17D1/075 ,  Y02B10/50 ,  Y02E10/22

公开(公告)号：EP2475747B1

公开(公告)日：2014-11-19

申请号：EP11751930.6

申请日：2011-03-30

申请人： Sime S.r.l.

发明人： FAVILLI, Stefano ,  LEITEMPERGHER, Giacinto ,  SCIBOLA, Luciano

IPC分类号： C10G5/06 ,  F25J3/06 ,  C10L3/10 ,  B01D53/00 ,  B01D53/26

CPC分类号： B01D53/002 ,  B01D53/265 ,  B01D2256/24 ,  B01D2257/702 ,  B01D2257/80 ,  C10G5/06 ,  C10G2300/1025 ,  C10L3/106 ,  C10L3/12 ,  F25J3/061 ,  F25J3/0635 ,  F25J3/064 ,  F25J2205/20 ,  F25J2230/08 ,  F25J2230/20 ,  F25J2230/32 ,  F25J2235/60 ,  F25J2240/02 ,  F25J2240/40 ,  F25J2245/02 ,  F25J2270/90 ,  F25J2290/42

公开(公告)号：EP2475747A2

公开(公告)日：2012-07-18

申请号：EP11751930.6

申请日：2011-03-30

申请人： Sime S.r.l.

发明人： FAVILLI, Stefano ,  LEITEMPERGHER, Giacinto ,  SCIBOLA, Luciano

IPC分类号： C10G5/06 ,  F25J3/06 ,  C10L3/10 ,  B01D53/00 ,  B01D53/26

CPC分类号： B01D53/002 ,  B01D53/265 ,  B01D2256/24 ,  B01D2257/702 ,  B01D2257/80 ,  C10G5/06 ,  C10G2300/1025 ,  C10L3/106 ,  C10L3/12 ,  F25J3/061 ,  F25J3/0635 ,  F25J3/064 ,  F25J2205/20 ,  F25J2230/08 ,  F25J2230/20 ,  F25J2230/32 ,  F25J2235/60 ,  F25J2240/02 ,  F25J2240/40 ,  F25J2245/02 ,  F25J2270/90 ,  F25J2290/42

摘要： 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.

公开(公告)号：EP2467568A2

公开(公告)日：2012-06-27

申请号：EP11743605.5

申请日：2011-03-29

申请人： Sime S.r.l.

发明人： FAVILLI, Stefano ,  LEITEMPERGHER, Giacinto ,  SCIBOLA, Luciano

IPC分类号： E21B41/00 ,  F03B13/10

CPC分类号： E21B41/0085 ,  F01D15/00 ,  F02C1/00 ,  F02C1/02 ,  F03B13/10 ,  F03G7/04 ,  F05B2220/602 ,  F05D2220/62 ,  F17D1/075 ,  Y02B10/50 ,  Y02E10/22

摘要： A method and an apparatus (100) for reducing the pressure of a natural gas (2) at a wellhead of a natural gas field. The method provides prearranging an energy recovery expansion device (20), which comprises a stator and a rotor mechanically connected with a power generator (29), and a gas passageway between the rotor and the stator, and conveying the natural gas into the passageway of the energy recovery expansion device (24) to cause a rotation of the rotor and the expansion of the gas, the pressure being reduced from the extraction pressure (Pi) to the use pressure (Pa), which makes it possible to obtain an electric power (W) during the expansion, adapted to satisfy the energy requirements of the gas extraction unit, in particular of an offshore platform, without installing local electric generators. In order to allow a reliable operation of a recovery expansion device, such as a turbine, a means is provided for finely separating solid and liquid matter present in the gas, as well as a means (7) for conditioning the gas entering the expansion device, which may comprise a feeding means (12) of an additive into the gas (3), said additive adapted to decrease the formation temperature of the solid, and, in an advantageous way in case of higher amount of water, a means for heating the gas such that the temperature is maintained above the formation temperature of the solid.