JPH0418191B2 - - Google Patents
Info
- Publication number
- JPH0418191B2 JPH0418191B2 JP19602885A JP19602885A JPH0418191B2 JP H0418191 B2 JPH0418191 B2 JP H0418191B2 JP 19602885 A JP19602885 A JP 19602885A JP 19602885 A JP19602885 A JP 19602885A JP H0418191 B2 JPH0418191 B2 JP H0418191B2
- Authority
- JP
- Japan
- Prior art keywords
- control valve
- load
- flow control
- flow rate
- low
- 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
- 238000001704 evaporation Methods 0.000 claims description 14
- 230000008020 evaporation Effects 0.000 claims description 14
- 239000006200 vaporizer Substances 0.000 claims description 6
- 238000011017 operating method Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 238000009835 boiling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000013535 sea water Substances 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
- F17C9/00—Methods or apparatus for discharging liquefied or solidified gases from vessels not under pressure
- F17C9/02—Methods or apparatus for discharging liquefied or solidified gases from vessels not under pressure with change of state, e.g. vaporisation
-
- 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
- F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
- F17C2227/03—Heat exchange with the fluid
- F17C2227/0367—Localisation of heat exchange
- F17C2227/0388—Localisation of heat exchange separate
- F17C2227/0393—Localisation of heat exchange separate using a vaporiser
-
- 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
- F17C2250/0636—Flow or movement of content
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〕
本発明は発電所あるいは都市ガス用に使用され
るベーパーライザーの低負荷に対応できる運転方
法に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method of operating a vaporizer used in a power plant or for city gas, which can handle low loads.
ベーパーライザーたとえばオープンラツク式ベ
ーパーライザー（以下ORVという）の蒸発装置
は第３図に示すように、蒸発ブロツク１０は縦方
向に配置された多数の蒸発管１０ａが複数列設け
られ、蒸発管１０ａに連通するヘツダー１１より
矢印LGで示すように液化ガスが蒸発管１０ａに
供給される。一方蒸発ブロツク１０の上方より矢
印Ｗで示すように、一般に常温の海水が送られ、
熱交換により液化ガスはガス化し供給先に送達さ
れる。
A vaporizer, for example, an open rack vaporizer (hereinafter referred to as ORV) evaporator, as shown in FIG. Liquefied gas is supplied from the communicating header 11 to the evaporation tube 10a as indicated by the arrow LG. On the other hand, seawater at room temperature is generally sent from above the evaporation block 10 as shown by arrow W.
The liquefied gas is gasified by heat exchange and delivered to the destination.
従来のORVの全体的な構成は第４図に示すよ
うに、並置された複数の蒸発ブロツク１０−１，
１０−２，…，１０−６には供給管１２が各蒸発
ブロツク１０−１，…１０−６に対応する分岐管
１２ａを通りヘツダー１１を介して連通され、液
化ガスが矢印LGに示すように供給される。供給
管１２には一個の流量調節弁１３が装着される。
蒸発ブロツク１０−１，…１０−６の上部にはガ
ス送出管１４が連通され矢印Ｇで示すようにガス
は使用先に送達される。矢印LGで示す液化ガス
の流量は一個の流量調節弁１３により調節され
る。 As shown in FIG. 4, the overall configuration of a conventional ORV includes a plurality of evaporation blocks 10-1, 10-1,
A supply pipe 12 is connected to the evaporation blocks 10-2, . . . , 10-6 via a header 11 through a branch pipe 12a corresponding to each evaporation block 10-1, . is supplied to One flow control valve 13 is attached to the supply pipe 12 .
A gas delivery pipe 14 is connected to the upper part of the evaporation blocks 10-1, . The flow rate of the liquefied gas indicated by the arrow LG is regulated by one flow rate control valve 13.
従来の発電所においては、例えば、出力60万
kw／ユニツト、LNG消費量約110t／ｈ／ユニツ
ト、最低負荷約30t／ｈ／（LNG）／ユニツト
（25％強）の運転範囲であれば、１台のORVで１
個の流量調節弁１３（第４図）で充分制御可能で
あつたが、近時設置される100万kw以上の発電ユ
ニツトの場合はLNG消費量は約170t／ｈ／ユニ
ツト程度となり、発電所がコンバインサイクルの
ような場合には、１ユニツトが７軸の発電機で構
成されるので、この場合の最低負荷はLNG消費
量で上記の３〜５％と極めて低い負荷となる。こ
の様な低負荷運転（３〜５％）の場合上記のよう
な１個の調節弁では正確な制御が極めて困難とな
る。そこで極めて精度の高い流量調節弁を使用す
るとしても、これは極めて高価でありしかも極低
負荷における流量の調節は充分にできない。
In a conventional power plant, for example, the output is 600,000 yen.
kW/unit, LNG consumption approximately 110t/h/unit, minimum load approximately 30t/h/(LNG)/unit (over 25%), one ORV can
However, in the case of power generation units of 1,000,000 kw or more, which are being installed recently, the LNG consumption will be approximately 170 t/h/unit, and the power plant In the case of a combine cycle, one unit consists of a seven-shaft generator, so the minimum load in this case is an extremely low load of 3 to 5% of the LNG consumption above. In such a low load operation (3 to 5%), accurate control is extremely difficult with a single control valve as described above. Therefore, even if a highly accurate flow control valve is used, it is extremely expensive and cannot adequately control the flow rate at extremely low loads.
本発明は、例えば100万kw以上の発電ユニツト
において、設計流量の３〜５％のような低負荷運
転における液化ガスの小流量の正確な調節が可能
であると共に高負煮運転における液化ガスの大流
量の正確な調節もできかつ急激な負荷変動に対し
充分な追従性を有するオープンラツク式ベーパー
ライザーの、特に低負荷の、運転方法を提供する
ことを目的とするものである。 The present invention makes it possible to accurately adjust the small flow rate of liquefied gas during low load operation, such as 3 to 5% of the design flow rate, in a power generation unit of 1 million kw or more, as well as to adjust the flow rate of liquefied gas during high negative boiling operation. The object of the present invention is to provide a method of operating an open rack vaporizer, particularly at low load, which allows accurate adjustment of a large flow rate and has sufficient followability to sudden load changes.
上記問題点を解決する本発明の手段は、１つの
ガス送出管に接続された複数の蒸発ブロツクをも
つ１台のベーパーライザーの液化ガス供給管を複
数の枝管に分岐し、各枝管にそれぞれ流量調節弁
を装着し、低負荷時には各流量調節弁を低開度に
した状態でその操作台数を変化させることによ
り、高負荷時には前記各流量調節弁を均等負荷制
御することにより、極めて低い負荷から100％負
荷までの広範囲で運転できることを特徴とするベ
ーパーライザーの運転方法、である。
The means of the present invention for solving the above problems is to branch the liquefied gas supply pipe of one vaporizer having a plurality of evaporation blocks connected to one gas delivery pipe into a plurality of branch pipes, and to connect each branch pipe to a plurality of branch pipes. Each is equipped with a flow control valve, and when the load is low, each flow control valve is kept at a low opening and the number of operating units is changed, and during high load, each flow control valve is controlled with equal load, thereby achieving extremely low This is a vapor riser operating method that is characterized by being able to operate over a wide range from load to 100% load.
ORVは多数の蒸発ブロツクからなつており、
本発明ではこの多数の蒸発ブロツクを数組に分割
し各組毎に流量調節弁を設け、低負荷において
は、まず１個の流量調節弁を開き他は閉じてお
く、負荷が大きくなるに従つて他の弁を順次開い
てゆき、すなわち各流量調節弁を低開度にした状
態でその操作台数を変化させ、高負荷運転時には
全流量調節弁を均等に開いて運転する。この事に
より極低負荷運転に対応した正確な液化ガスの流
量制御が可能になると共に高負荷においても良好
な追従性が得られる。ここで低開度とは、流量調
節弁の開度が低いこと、例えばおよそ30％の開度
にあることである。
The ORV consists of a number of evaporation blocks.
In the present invention, this large number of evaporation blocks is divided into several sets, and each set is provided with a flow control valve. At low loads, one flow control valve is first opened and the others are closed. As the load increases, the flow control valves are closed. Then, the other valves are opened one after another, that is, the number of operating valves is changed while each flow rate control valve is kept at a low opening degree, and during high load operation, all flow rate control valves are opened evenly. This makes it possible to accurately control the flow rate of liquefied gas corresponding to extremely low load operation, and also provides good followability even under high load. Here, the low opening degree means that the opening degree of the flow rate control valve is low, for example, approximately 30%.
つぎに本発明を実施例により図面を参照して説
明する。第１図は本発明の一実施例の構成を示す
図であつて、複数の蒸発ブロツク０−１，０−
２，…０−６が並置され、各ブロツク０−１，…
０−６はヘツダー１，…，１を有する。各ブロツ
ク０−１，…０−６およびヘツダー１，…，１の
構成は第３図で説明したものと同様である。各ブ
ロツクは２ケ宛、すなわちブロツク０−１，０−
２は分岐管２ａによりヘツダー１において連通さ
れ、分岐管２ａは第１枝管２ｂに連通する。ブロ
ツク０−３，０−４およびブロツク０−５，０−
６も同様に分岐管２a′，２a″を介して枝管２b′，
２b″にそれぞれ連通する。各枝管２ｂ，２b′，２
b″には第１、第２、第３の流量調節弁３，３′，
３″がそれぞれ装着され、各枝管２ｂ，２b′，２
b″は各弁３，３′，３″の上流側で供給管２より分
岐している。各ブロツク０−１，…０−６の上部
にはガス送出管４が連通され矢印Ｇで示すように
各ブロツク内で蒸発したガスは使用先に送達され
る。
Next, the present invention will be described by way of examples with reference to the drawings. FIG. 1 is a diagram showing the configuration of an embodiment of the present invention, in which a plurality of evaporation blocks 0-1, 0-
2,...0-6 are juxtaposed, each block 0-1,...
0-6 have headers 1,...,1. The structure of each block 0-1, . . . 0-6 and header 1, . . . , 1 is similar to that explained in FIG. Each block has two addresses, i.e. blocks 0-1, 0-
2 are communicated in the header 1 by a branch pipe 2a, and the branch pipe 2a communicates with a first branch pipe 2b. Block 0-3, 0-4 and block 0-5, 0-
Similarly, 6 also connects branch pipes 2b' and 2b' through branch pipes 2a' and 2a''.
2b'', respectively. Each branch pipe 2b, 2b', 2
b'' have first, second and third flow control valves 3, 3',
3'' is installed, and each branch pipe 2b, 2b', 2
b'' branches from the supply pipe 2 on the upstream side of each valve 3, 3', 3''. A gas delivery pipe 4 is connected to the upper part of each block 0-1, .
本発明においては、第２図に示すように極めて
低い負荷の際は第１流量調節弁３のみを開いて液
化ガスを調節し、負荷が上昇して第１流量調節弁
３の弁開度が30％に達すると、この開度に保持し
たまま第２流量調節弁３′も開き、これが30％に
達すると、第１、第２流量調節弁３，３′の開度
を30％に保持した状態で第３流量調節弁３″を開
く。このようにすると、液化ガス最大負荷流量の
約30％迄の低負荷において正確な流量制御ができ
る。各流量調節弁３，３′，３″の弁開度が30％を
越えるような負荷の場合は全調節弁３，３′，
３″を所要の均等開度に開く。 In the present invention, as shown in FIG. 2, when the load is extremely low, only the first flow rate control valve 3 is opened to adjust the liquefied gas, and as the load increases, the opening degree of the first flow rate control valve 3 is increased. When it reaches 30%, the second flow control valve 3' also opens while maintaining this opening, and when it reaches 30%, the opening of the first and second flow control valves 3, 3' is maintained at 30%. In this state, open the third flow control valve 3''. In this way, accurate flow control can be performed at low loads up to about 30% of the maximum load flow rate of liquefied gas. Each flow control valve 3, 3', 3'' If the load causes the valve opening degree to exceed 30%, all control valves 3, 3',
3" to the required even opening.
高負荷より低負荷に変動する場合は、上記と逆
の操作により負荷変動に対応する。 これらの操
作は一般にコンピユータによる自動制御により実
施される。 If the load changes from high to low, respond to the load change by performing the opposite operation to the above. These operations are generally performed under automatic control by a computer.
以上説明したように、本発明はORVの上流側
に複数個の流量調節弁を設け、すなわちORVの
複数の蒸発ブロツクを分割した組毎に流量調節弁
を設け、ORVの低負荷運転時に各流量調節弁を
低開度にした状態でその操作台数を変化させるこ
とにより、極低負荷時の流量制御が正確にできる
とともに、高負荷運転における良好な追従性も発
揮できる。
As explained above, the present invention provides a plurality of flow rate control valves on the upstream side of an ORV, that is, a flow rate control valve is provided for each group into which a plurality of ORV evaporation blocks are divided, and each By changing the number of control valves that are operated while keeping the control valves at a low opening degree, it is possible to accurately control the flow rate at extremely low loads, and also to exhibit good followability during high load operation.
第１図は本発明の一実施例の全体構成図、第２
図は本発明の一実施例の弁開度と液化ガス流量と
の関係を示すグラフ、第３図はORV蒸発ブロツ
クの一例の斜視図、第４図は従来のORVの全体
構成図である。
０−１，０−２，０−３，０−４，０−５，０
−６……蒸発ブロツク、２……供給管、２ａ，２
a′，２a″……分岐管、２ｂ，２b′，２b″……枝
管、３，３′，３″……流量調節弁。
Fig. 1 is an overall configuration diagram of an embodiment of the present invention, Fig. 2
The figure is a graph showing the relationship between the valve opening degree and the liquefied gas flow rate in one embodiment of the present invention, FIG. 3 is a perspective view of an example of an ORV evaporation block, and FIG. 4 is an overall configuration diagram of a conventional ORV. 0-1,0-2,0-3,0-4,0-5,0
-6... Evaporation block, 2... Supply pipe, 2a, 2
a', 2a''...branch pipe, 2b, 2b', 2b''...branch pipe, 3, 3', 3''...flow control valve.
Claims (1)
ロツクをもつ１台のベーパーライザーの液化ガス
供給管を複数の枝管に分岐し、各枝管にそれぞれ
流量調節弁を装着し、低負荷時には各流量調節弁
を低開度にした状態でその操作台数を変化させる
ことにより、高負荷時には前記各流量調節弁を均
等負荷制御することにより、極めて低い負荷から
100％負荷までの広範囲で運転できることを特徴
とするベーパーライザーの運転方法。1. The liquefied gas supply pipe of one vaporizer, which has multiple evaporation blocks connected to one gas delivery pipe, is branched into multiple branch pipes, and each branch pipe is equipped with a flow rate control valve. By changing the number of operating flow control valves with each flow control valve at a low opening, and by controlling the flow control valves with equal load during high loads, even from extremely low loads.
A vapor riser operating method that is characterized by its ability to operate over a wide range up to 100% load.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60196028A JPS6262094A (en) | 1985-09-06 | 1985-09-06 | Method of operating vaporizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60196028A JPS6262094A (en) | 1985-09-06 | 1985-09-06 | Method of operating vaporizer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6262094A JPS6262094A (en) | 1987-03-18 |
| JPH0418191B2 true JPH0418191B2 (en) | 1992-03-27 |
Family
ID=16351012
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60196028A Granted JPS6262094A (en) | 1985-09-06 | 1985-09-06 | Method of operating vaporizer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6262094A (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5156929B2 (en) * | 2007-08-29 | 2013-03-06 | 住友精密工業株式会社 | Cryogenic fluid heating / vaporizing device and operation method thereof |
| JP5363427B2 (en) * | 2010-06-18 | 2013-12-11 | 株式会社神戸製鋼所 | Low temperature liquefied gas vaporizer |
| JP5918178B2 (en) * | 2013-08-02 | 2016-05-18 | 株式会社神戸製鋼所 | Low temperature liquefied gas vaporizer |
| JP5841979B2 (en) * | 2013-08-02 | 2016-01-13 | 株式会社神戸製鋼所 | Low temperature liquefied gas vaporizer |
| JP6074073B2 (en) * | 2016-01-22 | 2017-02-01 | 株式会社神戸製鋼所 | Low temperature liquefied gas vaporizer |
| DE202016105234U1 (en) * | 2016-09-20 | 2017-12-21 | Saeta Gmbh & Co. Kg | Device for determining the volume flow of liquid gas discharged via a liquid gas line |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5737198A (en) * | 1980-08-15 | 1982-03-01 | Hitachi Ltd | Carburettor output pressure controller |
-
1985
- 1985-09-06 JP JP60196028A patent/JPS6262094A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5737198A (en) * | 1980-08-15 | 1982-03-01 | Hitachi Ltd | Carburettor output pressure controller |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6262094A (en) | 1987-03-18 |
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