GB2505240A - Ejector for temperature swing absorption process in an LNG plant - Google Patents
Ejector for temperature swing absorption process in an LNG plant Download PDFInfo
- Publication number
- GB2505240A GB2505240A GB201215116A GB201215116A GB2505240A GB 2505240 A GB2505240 A GB 2505240A GB 201215116 A GB201215116 A GB 201215116A GB 201215116 A GB201215116 A GB 201215116A GB 2505240 A GB2505240 A GB 2505240A
- Authority
- GB
- United Kingdom
- Prior art keywords
- temperature swing
- ejector
- swing absorption
- lng plant
- absorption process
- Prior art date
- Legal status (The legal status 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 status listed.)
- Withdrawn
Links
- 238000010521 absorption reaction Methods 0.000 title abstract description 13
- 238000000034 method Methods 0.000 title abstract description 8
- 238000012423 maintenance Methods 0.000 abstract description 6
- 230000008929 regeneration Effects 0.000 abstract description 6
- 238000011069 regeneration method Methods 0.000 abstract description 6
- 239000007789 gas Substances 0.000 description 14
- 239000003949 liquefied natural gas Substances 0.000 description 14
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 8
- 239000003345 natural gas Substances 0.000 description 3
- 238000001035 drying Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 241000282898 Sus scrofa Species 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
- B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
- B01D53/0462—Temperature swing adsorption
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/26—Drying gases or vapours
- B01D53/261—Drying gases or vapours by adsorption
-
- 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
- F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
- F25J1/0002—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the fluid to be liquefied
- F25J1/0022—Hydrocarbons, e.g. 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
- F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
- F25J1/02—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2256/00—Main component in the product gas stream after treatment
- B01D2256/24—Hydrocarbons
- B01D2256/245—Methane
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/80—Water
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/40—Further details for adsorption processes and devices
- B01D2259/40083—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption
- B01D2259/40086—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption by using a purge gas
Abstract
A less energy intensive and lower maintenance means for providing the driving force to a regeneration gas stream of a temperature swing absorption process for an LNG plant. An ejector utilizes the high pressure feed gas of the LNG plant as the motive force to drive the regeneration gas stream through the off line temperature swing absorption column.
Description
Elector For Temperature Swine Absorption Process In An LNG Plant
FIELD OF THE INVENTION
(001) The invention relates to liquefied natural gas (LNG) plants that utilize temperature swing absorption for drying feed gas.
BACKGROUND OF THE INVENTION
(002) LNG is predominantly methane that has been converted from gas to liquid form for ease of storage and transportation. This is because LNG takes up about 1/600th the volume of natural gas in the gaseous state. * S *
***.: (003) A typical process for obtaining LNG is depicted in the drawing figure. In particular, raw natural gas is first transported to the plant and then is processed to remove impurity gases, * : such as CO2, H2S, and condensates such as water, oil, mud, and any trace amounts of * mercury. Once purified, the natural gas is then cooled down in stages and condensed until * * liquefied. The resulting LNG is stored in tanks ready for shipment to market. * S * * *5
S *****
* (004) The drying of the feed gas to the LNG plant is often carried out using a temperature swing absorption process. The temperature swing absorption process requires a driving force for the gas stream, often a recycle gas stream, used to regenerate the off line bed of the temperature swing absorption apparatus. This driving force is typically a compressor.
However, compressors have the disadvantages of being energy intensive and having moving, e.g. rotating, parts that are relatively high maintenance.
(005) There is a need in the art for improvements to LNG plant design and operation.
SUMMARY OF THE INVENTION
(006) The invention provides a less energy intensive and lower maintenance means for providing the driving force to regeneration gas stream of the temperature swing absorption process. In particular, the invention utilizes an ejector that utilizes the high pressure feed gas of the LNG plant as the motive force to drive the regeneration gas stream through the off line temperature swing absorption column.
BRIEF DESCRIPTION OF THE DRAWINGS
(007) The drawing figure is a general flow diagram for LNG production.
DETAILED DESCRIPTION OF THE INVENTION
(008) The invention provides improvements to the operation of an LNG plant. In particular, the invention is a less energy intcnsive and lower maintenance means for providing the driving force to regeneration gas stream of the temperature swing absorption process.
* :* : (009) In particular, the invention utilizes an ejector that utilizes the high pressure feed gas of * * the LNG plant as the motive force to drive the regeneration gas stream through the off line temperature absorption column. **. * * * * ** *
r (010) In order for the ejector to operate effectively, the feed gas to the LNG plant and the * * ejector must have a pressure greater than 30 Barg in order to provide the recycle gas flow "* required to regenerate the off line temperature swing absorption column, when the LNG * liquefier is operating at 21 Barg.
(011) The invention provides numerous advantages. The ejector used in the invention is a simpler device than the conventional compressors used in the prior art. Ejectors have a lower capital cost than compressors making them more economical. Further, the ejector has a lower operating cost, requiring no energy to run, as opposed to a compressor which is energy intensive and has high operating costs. In addition, the ejector has no moving parts and therefore has a very low maintenance cost compared to a compressor that includes moving, e.g. rotating, elements as well as other components that may break down. Therefore, the invention utilizing an ejector in place of a compressor is more economical in all aspects, i.e. capital, operation and maintenance.
(012) It will be understood that the embodiments described herein are merely exemplary and that one skilled in the art may make variations and modifications without departing from the spirit and scope of the present invention All such variations and modifications are intended to be included within the scope of the invention as described above. Further, all embodiments disclosed are not necessarily in the alternative, as various embodiments of the invention may be combined to provide the desired result. * * . * **
* **.** * * *** * * * ** * * ** * * . * ** * ****** *
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB201215116A GB2505240A (en) | 2012-08-23 | 2012-08-23 | Ejector for temperature swing absorption process in an LNG plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB201215116A GB2505240A (en) | 2012-08-23 | 2012-08-23 | Ejector for temperature swing absorption process in an LNG plant |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB201215116D0 GB201215116D0 (en) | 2012-10-10 |
| GB2505240A true GB2505240A (en) | 2014-02-26 |
Family
ID=47045356
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB201215116A Withdrawn GB2505240A (en) | 2012-08-23 | 2012-08-23 | Ejector for temperature swing absorption process in an LNG plant |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2505240A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102079999A (en) * | 2011-01-21 | 2011-06-01 | 成都赛普瑞兴科技有限公司 | Method for producing liquefied natural gas and synthetic gas by taking coke oven gas as raw material |
| WO2011139500A1 (en) * | 2010-05-06 | 2011-11-10 | Linde Aktiengesellschaft | Methods for removing contaminants from natural gas |
-
2012
- 2012-08-23 GB GB201215116A patent/GB2505240A/en not_active Withdrawn
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011139500A1 (en) * | 2010-05-06 | 2011-11-10 | Linde Aktiengesellschaft | Methods for removing contaminants from natural gas |
| CN102079999A (en) * | 2011-01-21 | 2011-06-01 | 成都赛普瑞兴科技有限公司 | Method for producing liquefied natural gas and synthetic gas by taking coke oven gas as raw material |
Also Published As
| Publication number | Publication date |
|---|---|
| GB201215116D0 (en) | 2012-10-10 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |