WO2006004723B1 - Lng regasification configurations and methods - Google Patents

Lng regasification configurations and methods

Info

Publication number
WO2006004723B1
WO2006004723B1 PCT/US2005/022880 US2005022880W WO2006004723B1 WO 2006004723 B1 WO2006004723 B1 WO 2006004723B1 US 2005022880 W US2005022880 W US 2005022880W WO 2006004723 B1 WO2006004723 B1 WO 2006004723B1
Authority
WO
WIPO (PCT)
Prior art keywords
lng
demethanizer
pressure
processing plant
overhead product
Prior art date
Application number
PCT/US2005/022880
Other languages
French (fr)
Other versions
WO2006004723A1 (en
Inventor
John Mak
Ralph Neumann
Curt Graham
Dan Heffern
Original Assignee
Fluor Tech Corp
John Mak
Ralph Neumann
Curt Graham
Dan Heffern
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fluor Tech Corp, John Mak, Ralph Neumann, Curt Graham, Dan Heffern filed Critical Fluor Tech Corp
Priority to AU2005259965A priority Critical patent/AU2005259965B2/en
Priority to CA002574601A priority patent/CA2574601C/en
Priority to MX2007000929A priority patent/MX2007000929A/en
Priority to EA200700221A priority patent/EA010743B1/en
Priority to US11/658,110 priority patent/US20080264100A1/en
Priority to EP05763868.6A priority patent/EP1782010A4/en
Publication of WO2006004723A1 publication Critical patent/WO2006004723A1/en
Publication of WO2006004723B1 publication Critical patent/WO2006004723B1/en
Priority to NO20070553A priority patent/NO334716B1/en

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/0204—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream characterised by the feed stream
    • F25J3/0209—Natural gas or substitute natural gas
    • F25J3/0214—Liquefied natural gas
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/0228—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream characterised by the separated product stream
    • F25J3/0233—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream characterised by the separated product stream separation of CnHm with 1 carbon atom or more
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/0228—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream characterised by the separated product stream
    • F25J3/0238—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream characterised by the separated product stream separation of CnHm with 2 carbon atoms or more
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/0228—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream characterised by the separated product stream
    • F25J3/0242—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream characterised by the separated product stream separation of CnHm with 3 carbon atoms or more
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2200/00—Processes or apparatus using separation by rectification
    • F25J2200/02—Processes or apparatus using separation by rectification in a single pressure main column system
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2200/00—Processes or apparatus using separation by rectification
    • F25J2200/04—Processes or apparatus using separation by rectification in a dual pressure main column system
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2200/00—Processes or apparatus using separation by rectification
    • F25J2200/72—Refluxing the column with at least a part of the totally condensed overhead gas
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2200/00—Processes or apparatus using separation by rectification
    • F25J2200/74—Refluxing the column with at least a part of the partially condensed overhead gas
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2205/00—Processes or apparatus using other separation and/or other processing means
    • F25J2205/02—Processes or apparatus using other separation and/or other processing means using simple phase separation in a vessel or drum
    • F25J2205/04—Processes or apparatus using other separation and/or other processing means using simple phase separation in a vessel or drum in the feed line, i.e. upstream of the fractionation step
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2215/00—Processes characterised by the type or other details of the product stream
    • F25J2215/62—Ethane or ethylene
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2235/00—Processes or apparatus involving steps for increasing the pressure or for conveying of liquid process streams
    • F25J2235/60—Processes or apparatus involving steps for increasing the pressure or for conveying of liquid process streams the fluid being (a mixture of) hydrocarbons
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2240/00—Processes or apparatus involving steps for expanding of process streams
    • F25J2240/02—Expansion of a process fluid in a work-extracting turbine (i.e. isentropic expansion), e.g. of the feed stream
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2245/00—Processes or apparatus involving steps for recycling of process streams
    • F25J2245/02—Recycle of a stream in general, e.g. a by-pass stream
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2270/00—Refrigeration techniques used
    • F25J2270/02—Internal refrigeration with liquid vaporising loop
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2290/00—Other details not covered by groups F25J2200/00 - F25J2280/00
    • F25J2290/10—Mathematical formulae, modeling, plot or curves; Design methods

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Separation By Low-Temperature Treatments (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

LNG composition of LNG from a storage tank or other source is modified in a process in which the LNG is pumped to a first pressure and split into two portions. One portion of the pressurized LNG is then reduced in pressure and heavier components are separated from the reduced pressure LNG to thereby form a lean LNG. The lean LNG is then pumped to a higher pressure and combined with the other portion to form a leaner LNG. Preferably, separation is performed using a demethanizer, wherein part of the demethanizer overhead product is condensed to form the lean LNG, while another portion is used for column reflux. In further preferred configurations, ethane recovery is variable and in yet other configurations, propane or ethane can be delivered via a batching pipeline.

Claims

AMENDED CLAIMS[Received by the International Bureau on 09 January 2006 (09.01.06): Original claims 1- 21 replaced by amended claims 1-21]What is claimed is:
1. A LNG processing plant comprising; a LNG source that provides a first portion of LNG and a second portion of LNG, both portions having a pressure above a processing pressure; a pressure reduction device that is coupled to the LNG source and configured to reduce pressure of the first portion to the processing pressure; a processing unit configured to operate at the processing pressure and to receive the first portion from the pressure reduction device, wherein the processing unit is configured to remove heavier components in the first portion to thereby produce a lean LNG; and a combination unit in which the lean LNG and the second portion of the LNG are combined to a form a processed LNG.
2. The LNG processing plant of claim 1 , further comprising a purnp that pumps at least one of the first and second portions to a feed pressure.
3. The LNG processing plant of claim 2, further comprising a demethanizer that receives at least part of the second portion at a pressure lower than the feed pressure.
4. The LNG processing plant of claim 1 further comprising a demethanizer that produces an overhead product, wherein a heat exchanger cools at least pan of the overhead product to thereby produce a reflux stream for the demethanizer,
5. The LNG processing plant of claim 1 further comprising a demethanizer reflux drum that produces an overhead product, wherein a heat exchanger condenses at least part of the overhead product to thereby produce the lean LNG.
6. The LNG processing plant of claim 5 further comprising a second pump that pumps the lean LNG to a delivery pressure.
7. The LNG processing plant of claim 1 wherein the combination unit is configured to combine the first portion and the lean LNG at pipeline pressure to thereby form the processed LNG.
8. The LNG processing plant of claim 1, further comprising a deethanizer that receives a demethanizer bottom product and that produces a C2 overhead product and a C3 bottom product.
9. The LNG processing plant of claim 8, further comprising a deethanizer overhead condenser that is configured to provide refrigeration to the C2 overhead product using refrigeration content of the first portion of the LNG.
10. The LNG processing plant of claim 1 further comprising a generator that is driven by expansion of a heated and pressurized portion of the first portion of LNG to thereby produce energy.
11. A LNG processing plant comprising a heat exchanger that is configured such that at least part of a refrigeration content of LNG passing through the exchanger provides refrigeration to a demethanizer reflux stream and further provides condensation cold for a demethanizer reflux drum overhead product in an amount effective to condense the demethanizer reflux drum overhead product, and wherein the reflux stream and the reflux drum overhead product are produced from the LNG passing through the exchanger.
12. The LNG processing plant of claim 11 further comprising a demethanizer, wherein the demethanizer is coupled to the exchanger such that at least part of the LNG passing through the exchanger is fed to the demethanizer to thereby form at least one of the demethanizer reflux stream and a condensed demethanizer reflux drum overhead product.
13. The LNG processing plant of claim 11 wherein the LNG passing through the exchanger has a pressure of between 300 psig to 600 psig.
14. The LNG processing plant of claim 11 further comprising a pump that pumps the condensed demethanizer reflux drum overhead product to a delivery pressure.
15. The LNG processing plant of claim 14 further comprising a combination unit in which the condensed demethanizer reflux drum overhead product at delivery pressure is combined with LNG,
16. A method of processing LNG, comprising: providing LNG and pumping the LNG to a feed pressure; dividing the LNG at feed pressure in a first and second portion; providing the first portion to a separation pressure and separating heavier components from the first portion at the separation pressure to thereby form a lean LNG; pumping the lean LNG to a delivery pressure; and combining the lean LNG and the second portion of the LNG to form a processed LNG.
17. The method of claim 16 wherein the feed pressure is between about 700 psig and 1300 psig, the separation pressure is between about 300 psig and 650 psig, and wherein the delivery pressure is between about 700 psig and 1300 psig.
18. The method of claim 16 wherein separation of the heavier components from the first portion is performed in a demethanizer reflux drum that produces a demethanizer overhead product.
19. The method of claim 18 wherein at least one portion of the demethanizer reflux drum overhead product is condensed to thereby form the lean LNG11 and optionally wherein another portion of the demethanizer overhead product is cooled to thereby form a reflux stream for the demethanizer.
20. The method of claim 16 wherein separation of the heavier components from the first portion is performed in a demethanizer and in a deethanizer, wherein a demethanizer bottom product is fed 10 the deethanizer.
21. The method of claim 16 wherein ethane rejection or varying levels of ethane recovery is performed by blending a portion of liquid ethane product from a deethanizer overhead with processed LNG from a demetbanizer.
PCT/US2005/022880 2004-06-30 2005-06-27 Lng regasification configurations and methods WO2006004723A1 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
AU2005259965A AU2005259965B2 (en) 2004-06-30 2005-06-27 LNG regasification configurations and methods
CA002574601A CA2574601C (en) 2004-06-30 2005-06-27 Lng regasification configurations and methods
MX2007000929A MX2007000929A (en) 2004-06-30 2005-06-27 Lng regasification configurations and methods.
EA200700221A EA010743B1 (en) 2004-06-30 2005-06-27 Plant (embodiments) and method of lng regasification
US11/658,110 US20080264100A1 (en) 2004-06-30 2005-06-27 Lng Regasification Configurations and Methods
EP05763868.6A EP1782010A4 (en) 2004-06-30 2005-06-27 Lng regasification configurations and methods
NO20070553A NO334716B1 (en) 2004-06-30 2007-01-29 Liquid natural gas LNG treatment plant and method for treating LNG

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US58461104P 2004-06-30 2004-06-30
US60/584,611 2004-06-30
US68318105P 2005-05-20 2005-05-20
US60/683,181 2005-05-20

Publications (2)

Publication Number Publication Date
WO2006004723A1 WO2006004723A1 (en) 2006-01-12
WO2006004723B1 true WO2006004723B1 (en) 2006-08-17

Family

ID=35783200

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2005/022880 WO2006004723A1 (en) 2004-06-30 2005-06-27 Lng regasification configurations and methods

Country Status (8)

Country Link
US (1) US20080264100A1 (en)
EP (1) EP1782010A4 (en)
AU (1) AU2005259965B2 (en)
CA (1) CA2574601C (en)
EA (1) EA010743B1 (en)
MX (1) MX2007000929A (en)
NO (1) NO334716B1 (en)
WO (1) WO2006004723A1 (en)

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