JP2000213697A - Adsorption type boiloff gas holder and boiloff gas processing system - Google Patents
Adsorption type boiloff gas holder and boiloff gas processing systemInfo
- Publication number
- JP2000213697A JP2000213697A JP11017357A JP1735799A JP2000213697A JP 2000213697 A JP2000213697 A JP 2000213697A JP 11017357 A JP11017357 A JP 11017357A JP 1735799 A JP1735799 A JP 1735799A JP 2000213697 A JP2000213697 A JP 2000213697A
- Authority
- JP
- Japan
- Prior art keywords
- gas
- bog
- holder
- lng
- boiloff
- 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.)
- Pending
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- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、メタン或いはメタ
ンを主成分とするボイルオフガスを貯蔵・供給するボイ
ルオフガス処理技術に関する。The present invention relates to a boil-off gas processing technique for storing and supplying methane or a boil-off gas containing methane as a main component.
【０００２】[0002]
【従来の技術】液化天然ガス(LNG)貯槽より自然気化す
るボイルオフガス(BOG)の処理方法としては、一般に、L
NGを気化させて得られる需要先への供給ガスにBOGを混
入させる方法、およびBOGを低温に冷却して再度LNG(再
液化LNG)としてLNG貯槽に戻す方法などが知られてい
る。2. Description of the Related Art As a method for treating boil-off gas (BOG), which is naturally vaporized from a liquefied natural gas (LNG) storage tank, generally, LNG is used.
There are known a method of mixing BOG into a supply gas to a demand destination obtained by vaporizing NG, and a method of cooling BOG to a low temperature and returning it as LNG (reliquefied LNG) to an LNG storage tank again.
【０００３】しかしながら、BOGを供給ガスに混入させ
て処理する方法は、LNG貯槽へのLNG受入時などのように
BOG発生量が供給ガスへの混入可能なガス量を上回る時
がある場合には採用できず、余剰BOG分を貯蔵すること
が可能なようにLNG貯槽の圧力仕様を高めたり、後流側
にガスホルダーを設けることなどが必要となり、設備費
が高価となる。さらに、これらの処置が不可能な場合に
は、余剰BOGを大気放散するなどせねばならず、不経済
な上、安全上問題となる場合もある。[0003] However, the method of mixing and treating BOG into the supply gas is the same as when LNG is received into an LNG storage tank.
This method cannot be used when the amount of BOG generated sometimes exceeds the amount of gas that can be mixed into the supply gas.The pressure specification of the LNG storage tank must be increased so that excess BOG can be stored, or It is necessary to provide a gas holder or the like, and the equipment cost becomes high. Furthermore, if these measures are not possible, the excess BOG must be released to the atmosphere, which is uneconomical and may cause safety problems.
【０００４】また、再液化LNGとして処理する方法は、
冷却設備を必要とするので、やはり設備費が高価なもの
になる。[0004] The method of treating as reliquefied LNG is as follows:
Since the cooling equipment is required, the equipment cost is also expensive.
【０００５】[0005]
【発明が解決しようとする課題】従って、本発明は、BO
G発生量増大時の余剰BOGを一時的に貯蔵し、払出し可能
時に供給ガスにBOGを混入させることができ、かつ、コ
ンパクトで安価なBOGホルダーを提供することを主な目
的とする。Accordingly, the present invention relates to a BO
A main object of the present invention is to provide a compact and inexpensive BOG holder that can temporarily store excess BOG when the amount of generated G increases and mix BOG into supply gas when it can be dispensed.
【０００６】[0006]
【課題を解決するための手段】本発明者は、上記のよう
な技術の現状に留意しつつ、研究を重ねた結果、圧力容
器内に吸着材を収容し、これにボイルオフガスを吸着さ
せる場合に、上記の目的を達成しうることを見出した。
すなわち、本発明は、下記のメタン或いはメタンを主成
分とするボイルオフガスを貯蔵し、供給する技術を提供
する；１．圧力容器内に吸着材を収容しており、液化天
然ガスのボイルオフガスを常圧または加圧状態で貯蔵す
るための吸着式ボイルオフガスホルダー。Means for Solving the Problems The present inventor has studied the above-mentioned technology, and as a result of repeated research, has found that an adsorbent is accommodated in a pressure vessel and boil-off gas is adsorbed on the adsorbent. Have found that the above object can be achieved.
That is, the present invention provides a technique for storing and supplying the following methane or boil-off gas containing methane as a main component; An adsorption-type boil-off gas holder that contains an adsorbent in a pressure vessel and stores boil-off gas of liquefied natural gas at normal pressure or under pressure.
【０００７】２．上記項１に記載の吸着式ボイルオフガ
スホルダー、液化天然ガス貯槽、液化天然ガスポンプお
よび液化天然ガス気化器を備えたことを特徴とするボイ
ルオフガス処理システム。[0007] 2. Item 2. A boil-off gas treatment system comprising the adsorption-type boil-off gas holder, a liquefied natural gas storage tank, a liquefied natural gas pump, and a liquefied natural gas vaporizer according to the above item 1.
【０００８】[0008]
【発明の実施の形態】図１に本発明による吸着式ボイル
オフガスホルダーおよびボイルオフガス処理システムの
一例の概要をフローチャートとして示す。DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a flowchart showing an outline of an example of an adsorption type boil-off gas holder and a boil-off gas processing system according to the present invention.
【０００９】本発明によるボイルオフガス(BOG)処理シ
ステムは、少なくとも１基の吸着式BOGホルダー1、液化
天然ガス(LNG)貯槽3、LNGポンプ5、空気または海水など
の熱源と熱交換を行うLNG気化器7を主要構成要素として
いる。A boil-off gas (BOG) processing system according to the present invention comprises at least one adsorption type BOG holder 1, a liquefied natural gas (LNG) storage tank 3, an LNG pump 5, and an LNG for heat exchange with a heat source such as air or seawater. The vaporizer 7 is a main component.
【００１０】吸着式BOGホルダー1は、処理対象であるガ
ス(LNGより自然気化したBOGを主成分とするガス；その
他の可燃性ガスの混合ガスを含んでいても良い)の出入
り口と圧力容器内のガスを加圧状態で保持可能な気密保
持機構(バルブ)を備えており、内部に充填された吸着材
により、メタンを主成分とするBOGを常圧または加圧状
態で貯蔵することができる。[0010] The adsorption type BOG holder 1 is provided with an inlet / outlet of a gas to be treated (a gas mainly composed of BOG spontaneously vaporized from LNG; it may contain a mixed gas of other flammable gas) and a pressure vessel. Equipped with an airtight holding mechanism (valve) that can hold the gas under pressure, and the BOG containing methane as a main component can be stored at normal pressure or under pressure by the adsorbent filled inside .
【００１１】圧力容器の形状は、特に限定されず、球
形、円筒形、パイプ状、立方体、直方体、楕円球形など
の任意の形状であって良い。また、形状の異なる複数の
容器を併用しても良い。The shape of the pressure vessel is not particularly limited, and may be any shape such as a sphere, a cylinder, a pipe, a cube, a cuboid, and an elliptical sphere. Further, a plurality of containers having different shapes may be used in combination.
【００１２】吸着材としては、活性炭、ゼオライト、有
機金属錯体(フマル酸銅、シクロヘキサンジカルボン酸
銅、スチルベンジカルボン酸銅、テレフタル酸銅、ター
フェニルジカルボン酸銅、ビフェニルジカルボン酸銅、
トランジカルボン酸銅など)などが挙げられる。吸着材
としては、活性炭および有機金属錯体がより好ましい。
活性炭を使用する場合には、その形状は、特に限定され
ず、ペレット状、粒状、板状などの任意の形状であって
良いが、成形コストなどの点からは、ペレット状および
粒状のものが、より好ましい。As the adsorbent, activated carbon, zeolite, organic metal complexes (copper fumarate, copper cyclohexanedicarboxylate, copper stilbene dicarboxylate, copper terephthalate, copper terphenyldicarboxylate, copper biphenyldicarboxylate,
Etc.). Activated carbon and an organometallic complex are more preferable as the adsorbent.
When using activated carbon, the shape is not particularly limited, and may be any shape such as pellets, granules, and plates, but from the viewpoint of molding cost, pellets and granules are used. Is more preferable.
【００１３】本発明においては、処理ガス(余剰BOG)
は、LNG貯槽3からBOGライン9を経てバルブ11を通過して
吸着式BOGホルダー1にLNG貯槽の気相圧力下(通常5〜10k
Pa程度)に吸着、充填される。このような条件下におい
て、本発明で使用する吸着材は、その種類などにより異
なるが、高い貯蔵性能を示す。In the present invention, the processing gas (excess BOG)
From the LNG storage tank 3 through the valve 11 via the BOG line 9 and into the adsorption type BOG holder 1 under the gas phase pressure of the LNG storage tank (typically 5 to 10 k
(Approximately Pa). Under such conditions, the adsorbent used in the present invention exhibits high storage performance, depending on the type and the like.
【００１４】BOGの脱着(需要先への供給ガスに混入可能
時)に際しては、吸着式BOGホルダーの需要先側のバルブ
13を開放して脱着したBOGを送出し、通常送出ライン15
を経て送られてきた供給ガスに混入し、需要先へ供給さ
れる。At the time of desorption of BOG (when it can be mixed with supply gas to the customer), the valve on the customer side of the adsorption type BOG holder
13 and release the detached BOG to send out the normal transmission line 15
Mixed with the supply gas sent through the refrigeration system, and supplied to the demand destination.
【００１５】本発明において、吸着材をBOGホルダーに
用いることのメリットは以下の点である。In the present invention, the merits of using the adsorbent for the BOG holder are as follows.
【００１６】(1) LNGのBOGは、通常、1〜10kPa程度の低
圧ガスとして発生する。BOG処理においては、発生時の
圧力にて貯蔵、処理することが好ましい。本発明の吸着
式BOGホルダーの場合、圧力が低い程、圧縮式貯蔵(CNG)
に比べて貯蔵効率が高いため、吸着式BOGホルダーによ
るBOG貯蔵のメリットが大きい。(1) BOG of LNG is usually generated as a low-pressure gas of about 1 to 10 kPa. In the BOG treatment, it is preferable to store and process at the pressure at the time of occurrence. In the case of the adsorption type BOG holder of the present invention, the lower the pressure, the more the compression type storage (CNG)
Since the storage efficiency is higher than that of BOG, the merit of BOG storage by the adsorption type BOG holder is great.
【００１７】(2) 吸着式ガス貯蔵では、メタン系多成分
ガスの吸着の場合は、分子量の大きい成分程脱着し難
く、脱着ガスの組成変動が問題である。しかしながら、
LNGのBOGの成分は大半がメタンであること、また、供給
ガスでは添加されている付臭剤もLNGの状態では添加前
であるためにBOGには含まれていないことにより、BOGの
吸着式ホルダーによる処理ではこれらの問題をほぼ無視
することができ、ガス貯蔵の性能を最大限に活用でき
る。(2) In the case of adsorption type gas storage, in the case of adsorption of a methane-based multicomponent gas, components having a higher molecular weight are more difficult to desorb, and the composition fluctuation of the desorbed gas is a problem. However,
The majority of the BOG component in LNG is methane, and the odorant added in the feed gas is not included in the BOG because it is not added in the LNG state. These problems can be almost neglected in the holder treatment, and the gas storage performance can be maximized.
【００１８】[0018]
【発明の効果】本発明によれば、容積当たりのボイルオ
フガス貯蔵量の大きいガスホルダーを得ることが可能と
なるので、コンパクトで安価なボイルオフガス処理設備
の実現が可能となる。According to the present invention, it is possible to obtain a gas holder having a large amount of stored boil-off gas per volume, thereby realizing a compact and inexpensive boil-off gas treatment facility.
【００１９】また、LNG貯槽の圧力仕様を軽減できた
り、後流側のガスホルダーが不要となるなど、全体の設
備費の低減をはかることができる。Further, the overall equipment cost can be reduced, for example, the pressure specification of the LNG storage tank can be reduced, and the downstream gas holder is not required.
【図１】本発明による吸着式ボイルオフガスホルダーお
よびボイルオフガス処理システムの一例の概要を示すフ
ローチャートである。FIG. 1 is a flowchart showing an outline of an example of an adsorption type boil-off gas holder and a boil-off gas treatment system according to the present invention.
１…吸着式BOGホルダー ３…LNG貯槽 ５…LNGポンプ ７…LNG気化器 ９…BOGライン １１…バルブ １３…バルブ １５…通常送出ライン DESCRIPTION OF SYMBOLS 1 ... Adsorption type BOG holder 3 ... LNG storage tank 5 ... LNG pump 7 ... LNG vaporizer 9 ... BOG line 11 ... Valve 13 ... Valve 15 ... Normal delivery line
───────────────────────────────────────────────────── フロントページの続き (72)発明者 佐藤 悦郎 大阪府大阪市中央区平野町四丁目１番２号 大阪瓦斯株式会社内 Ｆターム(参考） 3E072 AA10 EA02 EA10 3E073 AA01 BA31 DC33 DD07 ────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Etsuo Sato 4-1-2, Hirano-cho, Chuo-ku, Osaka-shi, Osaka F-term in Osaka Gas Co., Ltd. (reference) 3E072 AA10 EA02 EA10 3E073 AA01 BA31 DC33 DD07
Claims (2)
天然ガスのボイルオフガスを常圧または加圧状態で貯蔵
するための吸着式ボイルオフガスホルダー。1. An adsorption type boil-off gas holder which contains an adsorbent in a pressure vessel and stores a boil-off gas of liquefied natural gas at normal pressure or a pressurized state.
ルダー、液化天然ガス貯槽、液化天然ガスポンプおよび
液化天然ガス気化器を備えたことを特徴とするボイルオ
フガス処理システム。2. A boil-off gas processing system comprising the adsorption-type boil-off gas holder according to claim 1, a liquefied natural gas storage tank, a liquefied natural gas pump, and a liquefied natural gas vaporizer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11017357A JP2000213697A (en) | 1999-01-26 | 1999-01-26 | Adsorption type boiloff gas holder and boiloff gas processing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11017357A JP2000213697A (en) | 1999-01-26 | 1999-01-26 | Adsorption type boiloff gas holder and boiloff gas processing system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000213697A true JP2000213697A (en) | 2000-08-02 |
Family
ID=11941804
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11017357A Pending JP2000213697A (en) | 1999-01-26 | 1999-01-26 | Adsorption type boiloff gas holder and boiloff gas processing system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000213697A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011159259A1 (en) * | 2010-06-17 | 2011-12-22 | National University Of Singapore | Method and system for storing natural gas |
-
1999
- 1999-01-26 JP JP11017357A patent/JP2000213697A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011159259A1 (en) * | 2010-06-17 | 2011-12-22 | National University Of Singapore | Method and system for storing natural gas |
| CN102946973A (en) * | 2010-06-17 | 2013-02-27 | 新加坡国立大学 | Method and system for storing natural gas |
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