JPH0419427B2 - - Google Patents
Info
- Publication number
- JPH0419427B2 JPH0419427B2 JP10755487A JP10755487A JPH0419427B2 JP H0419427 B2 JPH0419427 B2 JP H0419427B2 JP 10755487 A JP10755487 A JP 10755487A JP 10755487 A JP10755487 A JP 10755487A JP H0419427 B2 JPH0419427 B2 JP H0419427B2
- Authority
- JP
- Japan
- Prior art keywords
- bog
- receiving
- lng
- tank
- tanks
- 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
Links
- 238000000034 method Methods 0.000 claims description 19
- 230000000694 effects Effects 0.000 description 6
- 239000007788 liquid Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000003111 delayed effect Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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
- F17C6/00—Methods and apparatus for filling vessels not under pressure with liquefied or solidified gases
-
- 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
- F17C2201/00—Vessel construction, in particular geometry, arrangement or size
- F17C2201/01—Shape
- F17C2201/0104—Shape cylindrical
- F17C2201/0119—Shape cylindrical with flat 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
- F17C2201/00—Vessel construction, in particular geometry, arrangement or size
- F17C2201/05—Size
- F17C2201/052—Size large (>1000 m3)
-
- 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
- F17C2201/05—Size
- F17C2201/054—Size medium (>1 m3)
-
- 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
- F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
- F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
- F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
- F17C2205/0323—Valves
-
- 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
- F17C2221/00—Handled fluid, in particular type of fluid
- F17C2221/03—Mixtures
- F17C2221/032—Hydrocarbons
- F17C2221/035—Propane butane, e.g. LPG, GPL
-
- 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
-
- 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
- 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、タンカーにより運ばれて来たLNG
等の低温液化ガスを基地内の複数の貯蔵タンク内
に同時に受け入れる方法に関するものである。[Detailed Description of the Invention] [Industrial Application Field] The present invention is directed to LNG transported by a tanker.
The present invention relates to a method for simultaneously receiving low-temperature liquefied gas such as liquefied gas into multiple storage tanks within a base.
タンカーにより運ばれて来たLNG等の低温液
化ガスは、一旦基地内の貯蔵タンクに受け入れら
れここで貯蔵され、その後気化して消費側へ送り
出されるものであるが、例えば−162℃から成る
LNGの場合には、この貯蔵タンク内に貯蔵され
ている間も入熱により気化し、タンク内にBOG
が発生してタンク内の圧力が上昇する。そこで、
従来はこのBOGを一旦タンク外に抜き出し、
BOGコンプレツサーにより昇圧して再液化後再
びタンク内に戻すか消費側へ送り出すことにより
処理してタンク内の圧力の上昇を調整するという
手段を取つている。通常タンク内に発生する
BOGの量はほぼ一定であるが、タンカーから
LNGを受け入れる際は単位時間当り通常時の４
〜５倍の量が発生する。
Low-temperature liquefied gas such as LNG transported by tanker is once received in a storage tank on the base and stored there, after which it is vaporized and sent to the consumer side.
In the case of LNG, even while it is stored in this storage tank, it vaporizes due to heat input and BOG inside the tank.
occurs and the pressure inside the tank increases. Therefore,
Conventionally, this BOG was taken out of the tank,
The pressure is raised by a BOG compressor, and after re-liquefaction, it is returned to the tank or sent to the consumption side for treatment and to adjust the increase in pressure inside the tank. Usually occurs in tanks
The amount of BOG is almost constant, but from tankers
When accepting LNG, 4 times the normal time per unit time.
~5 times the amount is generated.
そこで、従来は第３図に示すように、タンク０
１内にタンク０１の上部から底部に至るロート管
０２を挿入し、このロート管０２を経由して
LNG受入ライン０３からボトムフイードライン
０４を介してLNGをタンク０１内の底部つまり
液中に受け入れると共にロート管０２の上口０
２′からタンク０１内上部のBOGをエゼクター効
果により吸引して液中に取り込み、再液化させる
ことによりBOGの処理量を減少させるという工
夫を行なつている。 Therefore, conventionally, as shown in Figure 3, the tank 0
Insert the funnel pipe 02 from the top to the bottom of the tank 01 into the tank 1, and pass through the funnel pipe 02.
LNG is received from the LNG receiving line 03 through the bottom feed line 04 into the bottom of the tank 01, that is, into the liquid, and the upper port 0 of the funnel pipe 02.
The BOG in the upper part of the tank 01 is sucked out from 2' by the ejector effect, taken into the liquid, and reliquefied, thereby reducing the amount of BOG to be processed.
しかし、このような方法を採用しても受入時に
おけるBOGの発生量は前記のように単位時間当
り通常時の４〜５倍であることから、BOGの処
理設備例えばBOGコンプレツサーの能力は、受
入時に発生するBOGのピーク量を処理するのに
十分なものでなければならない。この結果、従来
におけるBOGの処理設備は、受入時に発生する
BOGの処理を前提に設備されており、通常時は
過剰設備として遊休している。特に、受け入れる
タンクが複数の場合、この複数のタンクに同時に
例えばLNGを受け入れるという方法を採つてい
るため、このBOGの発生は、すべてのタンクに
おいてピークを同時に迎えてしまうという問題が
ある。
However, even if such a method is adopted, the amount of BOG generated at the time of receiving is 4 to 5 times the normal amount per unit time as mentioned above, so the capacity of BOG processing equipment such as BOG compressor is limited. It must be sufficient to handle the peak volumes of BOG that occur at times. As a result, conventional BOG processing equipment
It is equipped with the premise of processing BOG, and normally lies idle as excess equipment. In particular, in the case where there are multiple receiving tanks, for example, LNG is received simultaneously into the multiple tanks, so there is a problem in that the generation of BOG reaches its peak in all the tanks at the same time.
又、前記ボトムの受け入れ以外に、タンク０１
の上部空間に例えばLNGをスプレーしながら受
け入れてBOGを冷却し、再液化するトツプ受け
入れ法が存在する。 In addition to accepting the bottom, tank 01
There is a top acceptance method in which, for example, LNG is sprayed into the upper space of the BOG to cool the BOG and reliquefy it.
この両受け入れ法を比較した場合、ボトム受け
入れ法の場合は、受け入れラインを経由してタン
ク内に入つたLNGは、タンク内のLNGよりも高
温となつているが、液中に先ず流出して混合し、
冷却されることから、タンク液面に入熱が対流し
て到達し、BOG化するまでには時間的な遅れが
あり、通常受け入れ終了後からピークを迎える。 When comparing these two receiving methods, in the case of the bottom receiving method, the LNG that enters the tank via the receiving line is at a higher temperature than the LNG in the tank, but it first flows out into the liquid. mix,
Because it is cooled, there is a time delay before the heat convects and reaches the tank liquid surface and becomes BOG, and usually reaches its peak after the end of acceptance.
一方、トツプ受け入れ法の場合は、LNGを受
け入れた瞬間にタンク内に入熱が放熱され、タン
ク圧と平衡状態のLNG温度になるまでの相当熱
量がBOGとなり発生するため、ピークは受け入
れ開始直後から迎える。 On the other hand, in the case of the top reception method, the heat input into the tank is dissipated the moment LNG is received, and the equivalent amount of heat is generated as BOG until the LNG temperature reaches an equilibrium state with the tank pressure, so the peak occurs immediately after the start of reception. Welcome from.
このように、BOGの発生は、ボトム受け入れ
においては時間的に遅れてピークを迎え、トツプ
受け入れにおいては受け入れ直後からピークを迎
えてしまう。このため、複数のタンクに対して同
一の受け入れ方法を採用する従来例においては、
大きなピークがいずれか一方に片寄つてしまい、
BOGの処理設備もこのピークに合わせることが
必要となつている。 In this way, the occurrence of BOG reaches its peak after a time delay in bottom acceptance, and peaks immediately after acceptance in top acceptance. For this reason, in the conventional example where the same receiving method is adopted for multiple tanks,
The large peaks are shifted to one side,
BOG processing equipment also needs to match this peak.
本発明の目的は、低温液化ガスの複数のタンク
内に同時に受け入れる際に、BOGの発生量の総
和を経時的に平準化してBOG処理設備の小型化
と運転経費の節減を図ることのできる受け入れ方
法を提供することである。 An object of the present invention is to reduce the size of BOG processing equipment and reduce operating costs by equalizing the total amount of BOG generated over time when low-temperature liquefied gas is simultaneously received into multiple tanks. The purpose is to provide a method.
本発明の構成は次のとおりである。 The configuration of the present invention is as follows.
複数の貯蔵タンク内に同時に低温液化ガスを受
け入れる場合において、貯蔵タンクを２つに分
け、その一方はボトム受け入れを行ない、他方は
トツプ受け入れを行なうことを特徴とするタンカ
ーからLNG等の低温液化ガスを貯蔵タンク内に
受け入れる方法。 When receiving low-temperature liquefied gas into multiple storage tanks at the same time, the storage tanks are divided into two, one of which accepts the bottom and the other accepts the top. How to receive it into a storage tank.
タンカーからLNGを受け入れる場合、タンク
が４基存在する場合には、そのうち２基はトツプ
で、他の２基はボトムで同時に受け入れる。
When receiving LNG from a tanker, if there are four tanks, two of them will be accepted at the top and the other two will be accepted at the bottom at the same time.
この受け入れにより発生するBOG量のピーク
は、トツプ受け入れにおいては受け入れ直後から
ピークを迎え、ボトム受け入れにおいては時間的
に遅れ、大体受け入れ終了後からピークを迎え
る。 The peak amount of BOG generated by this acceptance peaks immediately after acceptance in top acceptance, and is delayed in time in bottom acceptance, reaching its peak approximately after acceptance is complete.
この結果、同時に受け入れているタンク群にお
いて、BOGの発生ピークを低く、かつ総和を経
時的に平準化することができる。 As a result, the peak of BOG generation can be kept low and the total amount can be leveled out over time in a group of tanks that are receiving at the same time.
第１図は本発明に係る受け入れ方法をLNG受
け入れ基地に実施した場合の説明図にして、符号
の１，１ａは受け入れ用のLNG貯蔵タンク（以
下タンクという）、２，２ａはタンク１，１ａ内
に挿入されたボトムの受け入れ用のロート管にし
て、このロート管２，２ａはタンク１，１ａ内に
おいて垂直にその上部から底部に近い位置まで挿
入されていると共に下端の吐出口３，３ａは水平
方向を向いている。
FIG. 1 is an explanatory diagram when the receiving method according to the present invention is implemented at an LNG receiving terminal, where 1 and 1a are LNG storage tanks for receiving (hereinafter referred to as tanks), and 2 and 2a are tanks 1 and 1a. The funnel tubes 2, 2a are inserted vertically into the tank 1, 1a from the top to a position close to the bottom, and the funnel tubes 2, 2a are inserted vertically into the tank 1, 1a from the top to a position close to the bottom, and have discharge ports 3, 3a at the bottom end. is oriented horizontally.
４はLNGタンカーが接岸した位置から前記タ
ンク１，１ａ内にLNGを受け入れるためのLNG
受入ライン、５，５ａは前記LNG受入ライン４
を分岐して前記タンク１，１ａに夫々LNGを受
け入れるための分岐受入ライン、６は更に前記分
岐受入ライン５，５ａを分岐してタンク１，１ａ
内の上部にその先端８，８ａを開口したトツプ受
け入れ用のトツプフイードライン、６ａは前記ロ
ート管２，２ａの入口に流出口７，７ａを開口し
たボトムフイードライン、９，９ａはタンク１，
１ａの上部からBOG処理設備用のBOGコンプレ
ツサー１０に至るBOGライン、１１，１１ａは
LNG払出ライン、１２，１２ａは前記LNG払出
ライン１１，１１ａを分岐してタンク１，１ａ内
底部に挿入したジエツトミキシングノズル１４，
１４ａとを連結しているジエツトミキシングライ
ン、１３，１３ａは払出ポンプである。 4 is LNG for receiving LNG into the tanks 1 and 1a from the position where the LNG tanker berths.
Receiving line 5, 5a is the LNG receiving line 4
A branch receiving line 6 branches the branch receiving line 5, 5a to receive LNG into the tanks 1, 1a, respectively.
6a is a bottom feed line with outlet ports 7, 7a opened at the inlets of the funnel pipes 2, 2a; 9, 9a are tank 1;
The BOG line 11, 11a runs from the top of 1a to the BOG compressor 10 for the BOG processing equipment.
The LNG discharging line 12, 12a is a jet mixing nozzle 14 inserted into the inner bottom of the tank 1, 1a by branching from the LNG discharging line 11, 11a.
A jet mixing line 13, 13a is connected to the jet mixing line 14a, and 13a is a dispensing pump.
図中１５，１６はトツプフイードライン６に取
り付けたトツプフイードバルブ、１５ａ，１６ａ
はボトムフイードライン６ａに取り付けたボトム
フイードバルブである。 In the figure, 15 and 16 are top feed valves attached to the top feed line 6, 15a and 16a.
is a bottom feed valve attached to the bottom feed line 6a.
次に、上記構成から成る受入基地のLNG受け
入れ方法を説明する。 Next, a method for receiving LNG at the receiving terminal configured as described above will be explained.
先ず、バルブ１５及び１６ａを閉じておく。こ
のようにしておくと、LNGタンカーから汲み出
されたLNGはLNG受入ライン４を経由してタン
ク１側においてはボトムフイードライン６ａから
タンク１内のBOGを取り込みながらロート管２
内に入り、吐出口３からタンク１内底部の液中に
流出する。 First, valves 15 and 16a are closed. In this way, the LNG pumped out from the LNG tanker passes through the LNG receiving line 4, and on the tank 1 side, the BOG in the tank 1 is taken in from the bottom feed line 6a, while the LNG is transferred to the funnel pipe 2.
It flows out from the discharge port 3 into the liquid at the bottom of the tank 1.
一方、タンク１ａ側においてはトツプフイード
ライン６から先端８ａを経由してタンク１ａ内上
部空間中に流出する。 On the other hand, on the tank 1a side, the water flows out from the top feed line 6 into the upper space of the tank 1a via the tip 8a.
タンク１，１ａ内に発生したBOGはBOGライ
ン９，９ａを経由してBOGコンプレツサー１０
により昇圧されて再液化されるか、消費側へ送出
される。 BOG generated in tanks 1 and 1a is sent to BOG compressor 10 via BOG lines 9 and 9a.
It is either pressurized and reliquefied or sent to the consumer.
払出ポンプ１３，１３ａは払出以外にタンク
１，１ａ内の液中の比重による層状化及びロール
オーバーを防止するため、ジエツトミキシングノ
ズル１４，１４ａを利用てLNGを循間（撹拌）
するために使用される。 In addition to dispensing, the dispensing pumps 13 and 13a circulate (stir) the LNG using jet mixing nozzles 14 and 14a in order to prevent layering and rollover due to the specific gravity of the liquid in the tanks 1 and 1a.
used for
上記受け入れ中において、トツプフイードライ
ン６とボトムフイードライン６ａに夫々取り付け
られたトツプフイードバルブ１５，１６及びボト
ムフイードバルブ１５ａ，１６ａはタンク１，１
ａ内のBOGの発生量を監視して、BOGの発生が
促進されているタンクにはトツプフイードライン
を使用し、エゼクター効果により抑制するタンク
にはボトムフイードラインを使用することによ
り、BOG発生量を時間的に平準化することが図
られる。 During the above-mentioned receiving, the top feed valves 15, 16 and bottom feed valves 15a, 16a attached to the top feed line 6 and bottom feed line 6a, respectively, are connected to the tanks 1, 1.
By monitoring the amount of BOG generated in a and using the top feed line in tanks where BOG generation is promoted and the bottom feed line in tanks where it is suppressed by the ejector effect, the amount of BOG generated can be reduced. The aim is to equalize the situation over time.
なお、実施例はタンク２基をもとに説明した
が、２基以上の場合にはトツプフイードラインと
ボトムフイードラインで受け入れているタンク群
に別ける。 Although the embodiment has been described based on two tanks, in the case of two or more tanks, the tank groups are divided into groups that accept the top feed line and the bottom feed line.
本発明は以上のように、複数のタンクに対して
同時に例えばLNGタンカーからLNGを受け入れ
る際に、トツプフイードラインで受け入れている
タンクとボトムフイードラインで受け入れている
タンクとを形成することにより、タンク群内に発
生するBOGの発生量のピークを低く抑え、かつ
総和を平準化できる。
As described above, when receiving LNG simultaneously from, for example, an LNG tanker into a plurality of tanks, the present invention forms a tank receiving the top feed line and a tank receiving the bottom feed line. It is possible to suppress the peak of the amount of BOG generated within a group and level out the total amount.
第２図は本発明による受け入れ方法と従来のボ
トム受け入れ方法による場合のBOGコンプレツ
サー吐出流量実積を示すもので、(1)は本発明の受
け入れ方法、(2)は従来の受け入れ方法である。こ
の図からも明らかなように、コンプレツサー吐出
流量を本発明を実施することにより経時的に平準
化できる。 FIG. 2 shows the actual BOG compressor discharge flow rate in the case of the receiving method according to the present invention and the conventional bottom receiving method, where (1) shows the receiving method of the present invention and (2) shows the conventional receiving method. As is clear from this figure, the compressor discharge flow rate can be leveled over time by implementing the present invention.
この平準化の効果により、BOGコンプレツサ
ーを運転台数を同一条件において従来例で
15000Nm3／Ｈ×３台であるとき、本発明による
と15000Nm3／Ｈ×２台となる。又、運転に伴う
最大電力は従来例であると3600Kwであるとこ
ろ、本発明によると2295Kwとなる。 Due to this leveling effect, the number of BOG compressors in operation can be reduced compared to the conventional example under the same conditions.
When it is 15000Nm 3 /H x 3 units, according to the present invention, it becomes 15000Nm 3 /H x 2 units. Furthermore, the maximum power required during operation is 3600Kw in the conventional example, but it is 2295Kw according to the present invention.
以上のように、本発明による低温液化ガスの受
け入れ方法を採用すると、BOGの処理設備、運
転に伴う最大電力などを大幅に削減できる効果が
ある。 As described above, the adoption of the method for receiving low-temperature liquefied gas according to the present invention has the effect of significantly reducing BOG processing equipment, maximum power required for operation, etc.
第１図は、本発明を実施したLNG受け入れ方
法の説明図、第２図(1)(2)は本発明により受け入れ
た場合と従来例のボトム受け入れ法により受け入
れた場合とのBOGの発生量の変化を示した説明
図、第３図は従来におけるボトムとトツプ受け入
れ方法の説明図である。
１，１ａ……タンク、２，２ａ……ロート管、
３，３ａ……吐出口、４……LNG受入ライン、
５，５ａ……分岐受入ライン、６……トツプフイ
ードライン、６ａ……ボトムフイードライン、
７，７ａ……流出口、８，８ａ……先端、９，９
ａ……BOGライン、１０……BOGコンプレツサ
ー、１１，１１ａ……LNG払出ライン、１２，
１２ａ……ジエツトミキシングライン、１３，１
３ａ……払出ポンプ、１４，１４ａ……ジエツト
ミキシングノズル、１５，１６……トツプフイー
ドバルブ、１５ａ，１６ａ……ボトムフイードバ
ルブ。
Figure 1 is an explanatory diagram of the LNG receiving method according to the present invention, and Figure 2 (1) and (2) show the amount of BOG generated when receiving according to the present invention and when receiving using the conventional bottom receiving method. FIG. 3 is an explanatory diagram showing the change in the bottom and top receiving methods in the prior art. 1, 1a... Tank, 2, 2a... Funnel pipe,
3, 3a...discharge port, 4...LNG receiving line,
5, 5a...branch receiving line, 6...top feed line, 6a...bottom feed line,
7, 7a... Outlet, 8, 8a... Tip, 9, 9
a...BOG line, 10...BOG compressor, 11, 11a...LNG discharging line, 12,
12a...Jet mixing line, 13,1
3a...Discharge pump, 14, 14a...Jet mixing nozzle, 15, 16...Top feed valve, 15a, 16a...Bottom feed valve.
Claims (1)
受け入れる場合において、貯蔵タンクを２つに分
け、その一方はボトム受け入れを行ない、他方は
トツプ受け入れを行なうことを特徴とするタンカ
ーからLNG等の低温液化ガスを貯蔵タンク内に
受け入れる方法。1. When receiving low-temperature liquefied gas into multiple storage tanks at the same time, the storage tanks are divided into two, one of which accepts the bottom and the other accepts the top. A method of receiving gas into a storage tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10755487A JPS63271000A (en) | 1987-04-28 | 1987-04-28 | Method for receiving low temperature liquefied gas such as lpg or the like from tanker into storage tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10755487A JPS63271000A (en) | 1987-04-28 | 1987-04-28 | Method for receiving low temperature liquefied gas such as lpg or the like from tanker into storage tank |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63271000A JPS63271000A (en) | 1988-11-08 |
| JPH0419427B2 true JPH0419427B2 (en) | 1992-03-30 |
Family
ID=14462127
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10755487A Granted JPS63271000A (en) | 1987-04-28 | 1987-04-28 | Method for receiving low temperature liquefied gas such as lpg or the like from tanker into storage tank |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63271000A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007292178A (en) * | 2006-04-25 | 2007-11-08 | Chiyoda Corp | Cold insulation circulation system of liquefied gas facility |
| JP2007292180A (en) * | 2006-04-25 | 2007-11-08 | Chiyoda Corp | Cold insulation circulation system of liquefied gas facility |
-
1987
- 1987-04-28 JP JP10755487A patent/JPS63271000A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63271000A (en) | 1988-11-08 |
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