JPH0253680B2 - - Google Patents

Info

Publication number
JPH0253680B2
JPH0253680B2 JP6504886A JP6504886A JPH0253680B2 JP H0253680 B2 JPH0253680 B2 JP H0253680B2 JP 6504886 A JP6504886 A JP 6504886A JP 6504886 A JP6504886 A JP 6504886A JP H0253680 B2 JPH0253680 B2 JP H0253680B2
Authority
JP
Japan
Prior art keywords
amount
bog
heat
gas
lng
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.)
Expired - Lifetime
Application number
JP6504886A
Other languages
Japanese (ja)
Other versions
JPS62224799A (en
Inventor
Tsugio Myamoto
Hideo Maruyama
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tokyo Gas Co Ltd
Original Assignee
Tokyo Gas Co Ltd
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 Tokyo Gas Co Ltd filed Critical Tokyo Gas Co Ltd
Priority to JP6504886A priority Critical patent/JPS62224799A/en
Publication of JPS62224799A publication Critical patent/JPS62224799A/en
Publication of JPH0253680B2 publication Critical patent/JPH0253680B2/ja
Granted legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/02—Special adaptations of indicating, measuring, or monitoring equipment
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/01—Shape
    • F17C2201/0104—Shape cylindrical
    • F17C2201/0109—Shape cylindrical with exteriorly curved end-piece
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2221/00—Handled fluid, in particular type of fluid
    • F17C2221/03—Mixtures
    • F17C2221/032—Hydrocarbons
    • F17C2221/033—Methane, e.g. natural gas, CNG, LNG, GNL, GNC, PLNG
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
    • F17C2223/0146—Two-phase
    • F17C2223/0153—Liquefied gas, e.g. LPG, GPL
    • F17C2223/0161—Liquefied gas, e.g. LPG, GPL cryogenic, e.g. LNG, GNL, PLNG
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/06—Controlling or regulating of parameters as output values
    • F17C2250/0605—Parameters
    • F17C2250/0631—Temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2265/00—Effects achieved by gas storage or gas handling
    • F17C2265/03—Treating the boil-off

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Description

【発明の詳細な説明】 ［産業上の利用分野］ 本発明は、液化天然ガス（以下「LNG」とい
う）の貯蔵タンク内に発生たボイルオフガス（以
下「BOG」という）の処理方法に関するもので
ある。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a method for treating boil-off gas (hereinafter referred to as "BOG") generated in a storage tank for liquefied natural gas (hereinafter referred to as "LNG"). be.

［従来技術とその問題点］ LNG貯蔵タンク内には自然入熱などにより常
時BOGが発生する。このBOGはそのまま消費側
へ送出される場合と、消費量を上回る場合には再
度加圧、冷却して貯蔵タンク内に戻されている。[Conventional technology and its problems] BOG is constantly generated in LNG storage tanks due to natural heat input. This BOG is either sent to the consumption side as is, or if it exceeds the consumption amount, it is pressurized and cooled again and returned to the storage tank.

本発明は、前者の直接消費側へ送出される場合
に関するものであるが、、通常このBOGは、−50
℃〜−90℃程度の温度を有し、体積が大きいこと
から、冷却ドラムを通して−100℃〜−150℃に冷
却して体積縮少を図つてから消費側（コンプレツ
サー側）へ送り出している。そして、この冷却熱
源にはLNGが利用されており、冷却ドラム内に
LNGを直接噴霧して熱交換つまり冷却を行なつ
ている。 The present invention relates to the former case where the BOG is sent directly to the consumer, but normally this BOG is -50
Since it has a temperature of approximately -90°C and a large volume, it is cooled to -100°C to -150°C through a cooling drum to reduce its volume before being sent to the consumer side (compressor side). LNG is used as the cooling heat source, and inside the cooling drum,
Heat exchange, or cooling, is performed by directly spraying LNG.

第２図はこの冷却ドラムを示し、符号の０１は
冷却ドラムにして、この冷却ドラム０１内に
BOGライン０２を経由してBOGを導き、更に
LNGライン０３からLNGを導き、このLNGを冷
却ドラム０１内に噴霧してBOGを冷却し、冷却
されたBOGはミストセパレーター０４でミスト
除去後、送出ライン０５から消費側へと送り出さ
れるもので、冷却温度は送出ライン０５に取り付
けた温度検出器０６により検出し、設定温度より
も高い場合にはLNG調節バルブ０７を制御して
LNGの量を増加し、低い場合には減量して温度
調節を行なうものである。 Fig. 2 shows this cooling drum, the code 01 is the cooling drum, and inside this cooling drum 01
Guide BOG via BOG line 02 and further
LNG is led from the LNG line 03, this LNG is sprayed into the cooling drum 01 to cool the BOG, and after the mist is removed from the cooled BOG by the mist separator 04, it is sent out from the delivery line 05 to the consumption side. The cooling temperature is detected by a temperature detector 06 attached to the delivery line 05, and if it is higher than the set temperature, the LNG control valve 07 is controlled.
The temperature is adjusted by increasing the amount of LNG and decreasing it when the amount is low.

符号の０８はドレンポンプを示す。 Reference numeral 08 indicates a drain pump.

BOGの温度は上記のように調節されて消費側
へ送り出されるものであるが、BOGの熱量は
LNGの主たる成分メタンに対してその他の成分
の沸点が高いこと及びBOGの発生量（圧力）の
変動に伴ない、刻々と変動する。このため、消費
側に対して安定した熱量のBOGを供給しなけれ
ばならない場合に、前記冷却装置とは別に熱量調
整装置を設ける必要があり、この熱量調整装置に
多くの費用がかかるという問題がある。 The temperature of BOG is adjusted as described above and sent to the consumption side, but the amount of heat in BOG is
The boiling point of other components is higher than methane, the main component of LNG, and the amount of BOG generated (pressure) fluctuates from moment to moment. For this reason, when it is necessary to supply BOG with a stable amount of heat to the consumer side, it is necessary to provide a heat amount adjustment device separately from the cooling device, and this problem arises in that this heat amount adjustment device costs a lot of money. be.

［発明の目的］ 本発明は、以上の如き点に鑑みて提案されるも
ので別に熱量調整装置を付加することなく熱量調
整を行なうことのできるボイルオフガスの処理方
法を提案するのが目的である。[Object of the Invention] The present invention has been proposed in view of the above points, and an object of the present invention is to propose a method for processing boil-off gas that can adjust the amount of heat without adding a separate heat amount adjustment device. .

［発明の構成］ 本発明は、上記目的を達成する手段として、ボ
イルオフガスを冷却ドラム内に導くと共に、この
冷却ドラム内に液化天然ガスを噴霧して該ボイル
オフガスを冷却する際に、冷却ドラムから消費側
に送出されるボイルオフガスの熱量を測定し、こ
の熱量が設定値より高い場合には液化天然ガスの
噴霧量を増やし、設定値より低い場合には減らし
てボイルオフガスの冷却と同時に熱量をも調整す
るようにしたものである。[Structure of the Invention] As a means for achieving the above object, the present invention introduces boil-off gas into a cooling drum, and when spraying liquefied natural gas into the cooling drum to cool the boil-off gas, the cooling drum The amount of heat of the boil-off gas sent to the consumption side is measured, and if this amount of heat is higher than the set value, the amount of liquefied natural gas sprayed is increased, and if it is lower than the set value, the amount of sprayed liquefied natural gas is decreased to cool the boil-off gas and reduce the amount of heat at the same time. It is also possible to adjust the

つまり、消費側に送出されるボイルオフガスの
熱量が設定値よりも高い場合には液化天然ガスの
噴霧量を増やし、温度を下げることによつて高沸
点、高発熱量成分例えばエタン、プロパン、ブタ
ン等の蒸発をおさえて発熱量を下げ、反対に設定
値よりも低い場合には液化天然ガスの噴霧量を減
らして高沸点、高発熱量成分の蒸発を促し、発熱
量を上げるようにしたもので、このような熱量調
整をボイルオフガスの冷却と同時に行なうように
したものである。 In other words, when the calorific value of the boil-off gas sent to the consumption side is higher than the set value, the amount of liquefied natural gas sprayed is increased, and by lowering the temperature, high boiling point, high calorific value components such as ethane, propane, butane, etc. etc., to lower the calorific value, and conversely, when the value is lower than the set value, the amount of liquefied natural gas sprayed is reduced to promote the evaporation of high boiling point and high calorific value components, increasing the calorific value. This adjustment of the amount of heat is performed simultaneously with the cooling of the boil-off gas.

［実施例］ 第１図は本発明の一実施例を示し、１はBOG
の冷却ドラム、２はこの冷却ドラム１内に設けた
ミストセパレーター、３はBOGとLNGの送入空
間、４は熱交換層、５は冷却ドラム１の送入空間
３内に貯蔵タンク（図示せず）内に発生した
BOGを回収し、送入するためのBOGライン、６
は冷却ドラム１の送入空間３内にLNGを噴霧す
るためのLNGラインにして、このライン６から
噴霧される−162℃の冷熱により冷却されたBOG
はミストセパレーター２でミストが除去され、
BOG送出ライン７から消費側（コンプレツサー
側）に送り出される。[Example] Figure 1 shows an example of the present invention, and 1 is a BOG
2 is a mist separator provided in the cooling drum 1, 3 is a BOG and LNG feeding space, 4 is a heat exchange layer, and 5 is a storage tank (not shown) in the feeding space 3 of the cooling drum 1. occurred within
BOG line for collecting and delivering BOG, 6
is an LNG line for spraying LNG into the feeding space 3 of the cooling drum 1, and the BOG cooled by the -162°C cold heat sprayed from this line 6.
The mist is removed by mist separator 2,
It is sent from the BOG sending line 7 to the consumer side (compressor side).

８はBOG送出ライン７内に取り付けられた
BOGの熱量検出装置にして、ここで検出された
熱量が設定値以上の場合には信号ライン１０を経
由して前記LNGライン６に設けた流量調節バル
ブ９を開けてLNGの噴霧量を増やし、高沸点、
高発熱量成分の蒸発をおさえて熱量を設定値に落
とす。反対に設定値以下の場合には流量調節バル
ブ９を絞つてLNGの噴霧量を減らし、高沸点、
高発熱量成分の蒸発を促して熱量を設定値まで上
げる。つまり、BOG送出ライン７から送り出さ
れるBOGの熱量は、圧力及び冷却ドラム１内に
対するLNGの噴霧量により変動するので、この
BOG送出ライン７で検出した熱量変動をフイー
ドバツクしてLNGの噴霧量によりBOGの冷却と
同時に熱量調整を行なう。１１はドレンポンプを
示す。 8 was installed inside BOG sending line 7
A BOG calorific value detection device is used, and if the calorific value detected here is greater than a set value, the flow rate control valve 9 provided in the LNG line 6 is opened via the signal line 10 to increase the amount of LNG sprayed. high boiling point,
Reduces the amount of heat to the set value by suppressing evaporation of high calorific value components. On the other hand, if it is below the set value, the flow rate control valve 9 is throttled to reduce the amount of LNG sprayed, resulting in a high boiling point,
Promotes evaporation of high calorific value components and increases the heat value to the set value. In other words, the amount of heat in the BOG sent out from the BOG delivery line 7 varies depending on the pressure and the amount of LNG sprayed into the cooling drum 1.
The heat amount fluctuation detected in the BOG sending line 7 is fed back and the amount of heat is adjusted at the same time as BOG cooling by the amount of LNG sprayed. 11 indicates a drain pump.

なお、上記実施例により、BOGの熱量調整と
同時に温度の調整も行なわれるが、万一温度調整
上必要な場合には、別に冷却装置を付加してもよ
い。 In addition, in the above embodiment, the temperature is adjusted at the same time as the heat amount adjustment of the BOG, but if necessary for temperature adjustment, a separate cooling device may be added.

［発明の効果］ 本発明は以上のように、冷却ドラムから送り出
されるBOGの熱量を検出し、この値に基づいて
冷却ドラム内に噴霧するLNGの量を制御して
BOGの出側の熱量を設定値に調整するようにし
たので、BOGの熱量調整のために特別な熱量調
整装置を付加する必要がないと共に同時にBOG
の冷却を行なつて消費側のコンプレツサーを処理
能力アツプを図ることができる。[Effects of the Invention] As described above, the present invention detects the amount of heat of BOG sent out from the cooling drum, and controls the amount of LNG sprayed into the cooling drum based on this value.
Since the heat amount on the outlet side of the BOG is adjusted to the set value, there is no need to add a special heat amount adjustment device to adjust the BOG heat amount, and at the same time, the BOG
By cooling the compressor, the processing capacity of the compressor on the consumer side can be increased.

【図面の簡単な説明】[Brief explanation of drawings]

第１図は本発明の一実施例を示す説明図、第２
図は従来のBOG冷却装置の説明図である。 １……冷却ドラム、２……ミストセパレータ
ー、３……送入空間、４……熱交換層、５……
BOGライン、６……LNGライン、７……BOG送
出ライン、８……熱量検出装置、９……LNG流
量調節バルブ、１０……信号ライン、１１……ド
レンポンプ。 FIG. 1 is an explanatory diagram showing one embodiment of the present invention, and FIG.
The figure is an explanatory diagram of a conventional BOG cooling device. 1... Cooling drum, 2... Mist separator, 3... Feeding space, 4... Heat exchange layer, 5...
BOG line, 6...LNG line, 7...BOG delivery line, 8...calorific value detection device, 9...LNG flow rate adjustment valve, 10...signal line, 11...drain pump.

Claims (1)

【特許請求の範囲】[Claims] １ ボイルオフガスを冷却ドラム内に導くと共
に、この冷却ドラム内に液化天然ガスを噴霧して
該ボイルオフガスを冷却する際に、冷却ドラムか
ら消費側に送出されるボイルオフガスの熱量を測
定し、この熱量が設定値より高い場合には液化天
然ガスの噴霧量を増やし、設定値より低い場合に
は減らしてボイルオフガスの冷却を行なうと同時
に熱量をも調整するボイルオフガスの処理方法。1. When introducing the boil-off gas into the cooling drum and spraying liquefied natural gas into the cooling drum to cool the boil-off gas, measure the calorific value of the boil-off gas sent from the cooling drum to the consumption side. A method for treating boil-off gas that cools the boil-off gas and adjusts the amount of heat at the same time by increasing the amount of liquefied natural gas sprayed when the amount of heat is higher than a set value, and decreasing it when it is lower than the set value.
JP6504886A 1986-03-24 1986-03-24 Treatment method for boil off gas Granted JPS62224799A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6504886A JPS62224799A (en) 1986-03-24 1986-03-24 Treatment method for boil off gas

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6504886A JPS62224799A (en) 1986-03-24 1986-03-24 Treatment method for boil off gas

Publications (2)

Publication Number Publication Date
JPS62224799A JPS62224799A (en) 1987-10-02
JPH0253680B2 true JPH0253680B2 (en) 1990-11-19

Family

ID=13275683

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6504886A Granted JPS62224799A (en) 1986-03-24 1986-03-24 Treatment method for boil off gas

Country Status (1)

Country Link
JP (1) JPS62224799A (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001124294A (en) * 1999-10-29 2001-05-11 Tokyo Electric Power Co Inc:The Cooling device for boil-off gas (BOG)
JP4907845B2 (en) * 2003-04-16 2012-04-04 東京瓦斯株式会社 Method for adjusting calorific value of delivered fuel gas, method for stabilizing heat quantity, and apparatus therefor
JP2007155060A (en) * 2005-12-07 2007-06-21 Chubu Electric Power Co Inc Boil-off gas reliquefaction method
GB201105823D0 (en) * 2011-04-06 2011-05-18 Liquid Gas Eqipment Ltd Method of cooling boil off gas and an apparatus therefor
EP2702311B1 (en) 2011-04-19 2021-06-09 Babcock IP Management (Number One) Limited Method of cooling boil off gas and an apparatus therefor
KR101644386B1 (en) * 2015-06-10 2016-08-01 삼성중공업 주식회사 Fuel gas supplying system in ships
KR102142114B1 (en) * 2016-04-04 2020-08-07 삼성중공업 주식회사 Fuel gas supplying system in ships

Also Published As

Publication number Publication date
JPS62224799A (en) 1987-10-02

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