JPH0243960B2 - - Google Patents
Info
- Publication number
- JPH0243960B2 JPH0243960B2 JP59060622A JP6062284A JPH0243960B2 JP H0243960 B2 JPH0243960 B2 JP H0243960B2 JP 59060622 A JP59060622 A JP 59060622A JP 6062284 A JP6062284 A JP 6062284A JP H0243960 B2 JPH0243960 B2 JP H0243960B2
- Authority
- JP
- Japan
- Prior art keywords
- flow rate
- reboiler
- gas
- circulation
- load
- 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 9
- 230000008020 evaporation Effects 0.000 claims description 7
- 238000009834 vaporization Methods 0.000 claims description 6
- 230000008016 vaporization Effects 0.000 claims description 6
- 230000001105 regulatory effect Effects 0.000 claims 2
- 230000007423 decrease Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 239000007788 liquid Substances 0.000 description 5
- 239000006200 vaporizer Substances 0.000 description 4
- 230000005611 electricity Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B35/00—Control systems for steam boilers
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Steam Boilers And Waste-Gas Boilers (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Description
【発明の詳細な説明】
〔発明の利用分野〕
本発明は、サーモサイフオン型リボイラの循環
流量制御装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a circulation flow rate control device for a thermosiphon reboiler.
サーモサイフオン型リボイラを用いて気体を気
化し蒸発ドラムなどを介して他へ供給する気化設
備において、気化した蒸気の受入側の必要度など
系外からの要求に追従して蒸気発生量を変化させ
る必要がある場合、いかなる要求蒸気量あるいは
要求蒸気量の急激な変動に対しても安定して供給
するためには、サーモサイフオン型リボイラの循
環流量特性を最適に制御することが必要であり、
本発明はこのような場合に好適なものである。
In vaporization equipment that uses a thermosiphon reboiler to vaporize gas and supply it to others via an evaporation drum, etc., the amount of steam generated can be changed in accordance with requests from outside the system, such as the need for the vaporized vapor on the receiving side. In order to provide a stable supply regardless of the required steam amount or rapid fluctuations in the required steam amount, it is necessary to optimally control the circulation flow characteristics of the thermosiphon reboiler. ,
The present invention is suitable for such cases.
従来より、蒸発ドラムおよびサーモサイフオン
型リボイラで構成される気化器系統は、液化ガス
気化設備などに広く用いられてきた。その代表的
な構成を第１図に示す。すなわち、蒸発ドラム１
内にホールドされている液がリボイラ２内に移動
し、伝熱管３内において熱媒体により加熱されて
流体の一部は気化する。このため、リボイラ２内
の流体は気液混相となり、蒸発ドラム１内の液よ
り平均比重が小さくなる。この比重差がドライビ
ングフオームとなつて液は循環を開始する。 Conventionally, vaporizer systems composed of an evaporating drum and a thermosiphon reboiler have been widely used in liquefied gas vaporization equipment and the like. A typical configuration is shown in FIG. That is, evaporation drum 1
The liquid held therein moves into the reboiler 2, is heated by the heat medium in the heat transfer tube 3, and a portion of the fluid is vaporized. Therefore, the fluid in the reboiler 2 becomes a gas-liquid mixed phase, and has a smaller average specific gravity than the liquid in the evaporation drum 1. This difference in specific gravity becomes a driving form and the liquid begins to circulate.
循環流量は、通常第２図に示すような特性を有
している。高負荷点から徐々に負荷を下げると、
ある負荷までは循環流量が増加する傾向がある
が、これはリボイラの出口配管におけるガス流量
による圧力損失がおよそ負荷の２乗に比例して減
少し、負荷減少にともなうドライビングフオーム
の低下に勝るために起こる現象である。さらに負
荷が低下すると循環流量は急激に減少し、負荷が
０にる前に液は循環しなくなる。このような低負
荷域では、わずかな負荷変動に対しても循環流量
は大きく変わり、特に循環が停止する付近ではこ
の傾向は顕著となる。この結果、低負荷域で循環
流量は振動することになり、この気化器系統に対
して機械的振動を与える結果となるばかりでな
く、ガス発生量の変動によつて安定したガスを供
給できなくなることも考えられる。 The circulating flow rate usually has characteristics as shown in FIG. When the load is gradually lowered from a high load point,
The circulating flow rate tends to increase up to a certain load, but this is because the pressure loss due to the gas flow rate in the reboiler outlet piping decreases approximately in proportion to the square of the load, which outweighs the drop in driving form that occurs as the load decreases. This is a phenomenon that occurs in When the load further decreases, the circulation flow rate decreases rapidly, and the liquid stops circulating before the load reaches zero. In such a low load range, the circulation flow rate changes significantly even with a slight load change, and this tendency is particularly noticeable near the point where circulation stops. As a result, the circulating flow rate oscillates in the low load range, which not only causes mechanical vibrations to the vaporizer system, but also makes it impossible to supply a stable gas due to fluctuations in the amount of gas generated. It is also possible.
以上の事項から、サーモサイフオン型リボイラ
においては、低負荷域での循環流量の急激な減少
および循環停止などの現象をできるだけ緩和する
ことが、安定性確保の上で必要になる。上記低負
荷域での循環流量の減少は、ドライビングフオー
スすなわち浮力の急激な低下が原因している。 In view of the above, in order to ensure stability in a thermosiphon reboiler, it is necessary to alleviate phenomena such as a sudden decrease in circulation flow rate and circulation stoppage in a low load region as much as possible. The decrease in the circulating flow rate in the low load range is caused by a sudden decrease in driving force, that is, buoyancy.
本発明は上記の点にかんがみ、低負荷域での循
環流量の急激な変動を緩和することを目的とした
ものである。
In view of the above points, the present invention aims at alleviating rapid fluctuations in the circulating flow rate in a low load region.
本発明は、サーモサイフオン型リボイラの出口
配管に流量調節弁を有するバイパスラインを設
け、供給ガス量の要求値に応じてバイパスライン
に流す流量を制御するようにしたものである。
In the present invention, a bypass line having a flow rate control valve is provided in the outlet piping of a thermosiphon reboiler, and the flow rate flowing through the bypass line is controlled according to a required value of the amount of gas to be supplied.
本発明の実施例を第３図に示す。本図は、液化
ガスを気化しこれを燃料とする火力発電プラント
に供給する気化設備の気化器系統に適用したもの
である。
An embodiment of the invention is shown in FIG. This figure is applied to a vaporizer system of vaporization equipment that vaporizes liquefied gas and supplies it to a thermal power plant that uses it as fuel.
気化器は、蒸発ドラム１およびサーモサイフオ
ン型リボイラ２によつて構成され、リボイラ出口
配管をチヤンネル上部の主管６および側部のバイ
パス配管１０の２本設け、バイパス配管１０に流
量調節弁１１を設けている。また、ガス発生量は
電力需要量に基づく発電プラント用ボイラの燃料
要求量によつて決定される。電力需要量は一般に
通常運転時に対し110％から15〜20％の範囲で大
きく変動するため、気化設備側もこれに追従して
ガス量の制御を行わねばならない。本発明は、蒸
発ドラム１出口ガス流量を出口ガス配管７に設け
た流量検出器１３で検出し、この信号を上記流量
調節弁１１に送り、あらかじめ設定した弁開度と
する。それにより、低負荷域での循環流量の急激
な変動を緩和できるよう最適に制御される。 The vaporizer is composed of an evaporation drum 1 and a thermosiphon type reboiler 2, and has two reboiler outlet pipes, a main pipe 6 at the top of the channel and a bypass pipe 10 at the side, and a flow rate control valve 11 in the bypass pipe 10. It is set up. Further, the amount of gas generated is determined by the amount of fuel required for the power plant boiler based on the amount of electricity demanded. Since the amount of electricity demanded generally fluctuates greatly in the range of 110% to 15 to 20% compared to normal operation, the vaporization equipment must follow this and control the gas amount. In the present invention, the flow rate of gas at the outlet of the evaporating drum 1 is detected by a flow rate detector 13 provided on the outlet gas pipe 7, and this signal is sent to the flow rate control valve 11 to set the valve opening to a preset degree. As a result, optimal control is achieved to alleviate rapid fluctuations in the circulation flow rate in low load areas.
最適に制御した結果、サーモサイフオン型リボ
イラの循環特性は第４図に示す傾向となり、（点
線より右が通常運転範囲）循環流量は負荷ゼロ付
近で停止することになる。したがつて、通常運転
の負荷範囲（100％〜20％，ただし緊急時に負荷
をしや断する場合を除く）での循環の不安定現象
を解消することが可能となる。 As a result of optimal control, the circulation characteristics of the thermosiphon reboiler tend to be as shown in FIG. 4 (the normal operating range is to the right of the dotted line), and the circulation flow rate stops near zero load. Therefore, it is possible to eliminate the unstable circulation phenomenon in the normal operation load range (100% to 20%, except when the load is interrupted in an emergency).
以上述べたように、本発明によれば液化ガス気
化設備などにおいて、低負荷域での循環流量の急
激な変動を緩和することができる効果がある。
As described above, according to the present invention, in liquefied gas vaporization equipment, etc., there is an effect that rapid fluctuations in the circulation flow rate in a low load region can be alleviated.
第１図は従来装置の系統図、第２図は従来のサ
ーモサイフオン型リボイラの循環特性を示す線
図、第３図は本発明装置の系統図、第４図は本発
明によるサーモサイフオン型リボイラの循環特性
を示す線図である。
１…蒸発ドラム、２…リボイラ、３…伝熱管、
６…主管、７…出口ガス配管、１０…バイパス配
管、１１…流量調節弁、１３…流量検出器。
Fig. 1 is a system diagram of the conventional device, Fig. 2 is a diagram showing the circulation characteristics of a conventional thermosiphon reboiler, Fig. 3 is a system diagram of the device of the present invention, and Fig. 4 is a diagram of the thermosiphon reboiler according to the present invention. FIG. 3 is a diagram showing the circulation characteristics of a mold reboiler. 1... Evaporation drum, 2... Reboiler, 3... Heat exchanger tube,
6... Main pipe, 7... Outlet gas piping, 10... Bypass piping, 11... Flow rate control valve, 13... Flow rate detector.
Claims (1)
と、その循環経路とを備える液化ガスの気化設備
において、 前記リボイラ出口の循環経路より低い位置に流
量調節弁を有するバイパス配管を設けると共に、
蒸発ドラムの出口ガス配管に流量検出器を設け、
供給ガス量の要求値に応じて、前記流量検出器で
前記流量調節弁を制御する如く流量検出器と流量
調節弁とを連結したことを特徴とするサーモサイ
フオン型リボイラの循環流量制御装置。[Claims] 1. In a liquefied gas vaporization equipment comprising an evaporation drum, a thermosiphon reboiler, and a circulation path thereof, a bypass pipe having a flow rate control valve is provided at a position lower than the circulation path at the outlet of the reboiler. With,
A flow rate detector is installed on the outlet gas piping of the evaporation drum,
A circulating flow rate control device for a thermosiphon reboiler, characterized in that a flow rate detector and a flow rate regulating valve are connected so that the flow rate regulating valve is controlled by the flow rate detector in accordance with a required value of the amount of gas to be supplied.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6062284A JPS6049197A (en) | 1984-03-30 | 1984-03-30 | Circulating flow control unit of thermosyphon reboiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6062284A JPS6049197A (en) | 1984-03-30 | 1984-03-30 | Circulating flow control unit of thermosyphon reboiler |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6049197A JPS6049197A (en) | 1985-03-18 |
| JPH0243960B2 true JPH0243960B2 (en) | 1990-10-02 |
Family
ID=13147568
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6062284A Granted JPS6049197A (en) | 1984-03-30 | 1984-03-30 | Circulating flow control unit of thermosyphon reboiler |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6049197A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54217A (en) * | 1977-06-03 | 1979-01-05 | Chiyoda Chem Eng & Constr Co Ltd | Liquefied-gas vaporizer-feeder |
-
1984
- 1984-03-30 JP JP6062284A patent/JPS6049197A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54217A (en) * | 1977-06-03 | 1979-01-05 | Chiyoda Chem Eng & Constr Co Ltd | Liquefied-gas vaporizer-feeder |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6049197A (en) | 1985-03-18 |
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