JPH04327701A - Steam generator - Google Patents

Steam generator

Info

Publication number
JPH04327701A
JPH04327701A JP12500191A JP12500191A JPH04327701A JP H04327701 A JPH04327701 A JP H04327701A JP 12500191 A JP12500191 A JP 12500191A JP 12500191 A JP12500191 A JP 12500191A JP H04327701 A JPH04327701 A JP H04327701A
Authority
JP
Japan
Prior art keywords
cooling water
engine
steam
circulation passage
pressure
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
Application number
JP12500191A
Other languages
Japanese (ja)
Inventor
Nobuyuki Honma
信行 本間
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.)
Yanmar Co Ltd
Original Assignee
Yanmar Diesel Engine 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 Yanmar Diesel Engine Co Ltd filed Critical Yanmar Diesel Engine Co Ltd
Priority to JP12500191A priority Critical patent/JPH04327701A/en
Publication of JPH04327701A publication Critical patent/JPH04327701A/en
Pending legal-status Critical Current

Links

Landscapes

  • Engine Equipment That Uses Special Cycles (AREA)

Abstract

PURPOSE:To make a surplus steam recovery device unnecessary and, at the same time, prevent cavitation by providing the circulation channel for the engine cooling water with a branch channel and connecting them through a flow regulating valve and, at the same time, providing the branch channel with a cooling device for the engine cooling water. CONSTITUTION:Between a gas engine 1 that drives a generator and an air and water tank 2 a circulation channel 3 for the engine cooling water is provided. And a piping 5 for taking out steam is connected to the air and water tank 2, and in an intermediate position of this piping 5 a motor-operated pressure regulating valve 6 is provided. In this case, between the downstream side of the gas engine 1 and the upstream side of an orifice 10 the circulation channel 3 is provided with a branch channel 11. And as a cooling means for the engine cooling water that flows through the branch channel 11 a heat exchanger 12 is provided. Furthermore, the branch channel 11 and the circulation channel 3 are connected through a motoroperated flow regulating valve 16 in order to return to the circulation channel 3 the cooling water cooled by the heat exchanger 12.

Description

【発明の詳細な説明】[Detailed description of the invention]

【0001】0001

【産業上の利用分野】本発明はエンジンの排熱を利用し
て蒸気を発生する装置の改良に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a device for generating steam using exhaust heat from an engine.

【0002】0002

【従来の技術】例えばコージェネレーションシステムに
あっては、発電機を駆動するエンジンの排熱を利用して
蒸気を発生させている。図2は従来の蒸気発生装置を示
し、エンジン101と気水タンク102との間にエンジ
ン冷却水の循環通路103が設けられている。その循環
通路103の途中にポンプ104が設けられ、このポン
プ104により循環通路103を冷却水が循環する。ま
た、循環通路103には、エンジン101により昇温さ
れた冷却水の圧力を大気圧以上とするためオリフィス1
07が設けられている。これにより、エンジン101に
より昇温されたエンジン冷却水の温度は100℃を超え
ることとなる。そして、気水タンク102から圧力調節
弁108を介して一定圧力の蒸気が取り出される。なお
、気水タンク102に冷却水を補充するためのポンプ1
05と冷却水補充用の配管106とが設けられている。
2. Description of the Related Art For example, in a cogeneration system, exhaust heat from an engine that drives a generator is used to generate steam. FIG. 2 shows a conventional steam generator, in which an engine cooling water circulation passage 103 is provided between an engine 101 and a steam tank 102. A pump 104 is provided in the middle of the circulation passage 103, and the pump 104 circulates cooling water through the circulation passage 103. In addition, an orifice 1 is provided in the circulation passage 103 in order to make the pressure of the cooling water heated by the engine 101 higher than atmospheric pressure.
07 is provided. As a result, the temperature of the engine cooling water heated by the engine 101 exceeds 100°C. Then, steam at a constant pressure is taken out from the steam tank 102 via the pressure regulating valve 108. In addition, the pump 1 for replenishing the air water tank 102 with cooling water
05 and a piping 106 for replenishing cooling water.

【0003】0003

【発明が解決しようとする課題】上記のような従来の蒸
気発生装置にあっては、気水タンク102から圧力調節
弁108を介して取り出す蒸気の使用量が少なくなった
場合、余剰蒸気を回収するための装置が別途必要になる
。これは、余剰蒸気の回収装置を設けることなく蒸気取
り出し量を減少させると、循環通路103内の圧力が上
昇して冷却水温度が上昇するため、エンジン101を運
転することができなくなることによる。
[Problems to be Solved by the Invention] In the conventional steam generator as described above, when the amount of steam taken out from the steam tank 102 via the pressure control valve 108 decreases, surplus steam is recovered. Separate equipment is required to do so. This is because if the amount of steam taken out is reduced without providing a surplus steam recovery device, the pressure in the circulation passage 103 will rise and the temperature of the cooling water will rise, making it impossible to operate the engine 101.

【0004】しかし、そのような余剰蒸気の回収装置の
設置は設備コストの増大の要因であった。
[0004] However, the installation of such a surplus steam recovery device has been a factor in increasing equipment costs.

【0005】また、エンジン101の停止後にあっては
、エンジン101を充分に冷却するためアフタークーリ
ングが必要となるが、この場合、循環通路103を流れ
る冷却水はエンジンの排熱により加熱されないため、循
環通路における圧力は低下する。そのため冷却水中に気
泡が生じ、この気泡はアフタークーリング時やエンジン
の再起動時にポンプ104に入り込んでキャビテーショ
ンの原因となる。
[0005] Furthermore, after the engine 101 has stopped, aftercooling is required to sufficiently cool the engine 101, but in this case, the cooling water flowing through the circulation passage 103 is not heated by the exhaust heat of the engine. The pressure in the circulation passage decreases. As a result, bubbles are generated in the cooling water, and these bubbles enter the pump 104 during after-cooling or when the engine is restarted, causing cavitation.

【0006】本発明は上記従来技術の問題を解決するこ
とのできる蒸気発生装置を提供することを目的とする。
[0006] An object of the present invention is to provide a steam generator capable of solving the problems of the prior art described above.

【0007】[0007]

【課題を解決するための手段】本発明の特徴とするとこ
ろは、エンジンと気水タンクとの間にエンジン冷却水の
循環通路が設けられ、その気水タンクから蒸気が圧力調
節弁を介し取り出される蒸気発生装置において、前記循
環通路から分岐する分岐通路が設けられ、この分岐通路
を流れるエンジン冷却水の冷却手段が設けられ、この冷
却手段により冷却されたエンジン冷却水が流れる分岐通
路と前記循環通路とが流量調節弁を介し接続される点に
ある。
[Means for Solving the Problems] The present invention is characterized in that an engine cooling water circulation passage is provided between the engine and the steam tank, and steam is taken out from the steam tank via a pressure control valve. In the steam generator, a branch passage branching from the circulation passage is provided, a cooling means for engine cooling water flowing through the branch passage is provided, and the engine cooling water cooled by the cooling means flows through the branch passage and the circulation passage. The flow control valve is connected to the passageway through a flow control valve.

【0008】[0008]

【作用】本発明の構成によれば、分岐通路と循環通路と
を接続する流量調節弁を開くことにより、循環通路に冷
却手段により冷却されたエンジン冷却水が流入し、循環
通路を流れるエンジン冷却水が冷却される。これにより
、圧力調節弁の上流側における蒸気圧力が減少し、圧力
調節弁を介し取り出される蒸気量を減少させることがで
きる。
[Operation] According to the structure of the present invention, by opening the flow control valve connecting the branch passage and the circulation passage, engine cooling water cooled by the cooling means flows into the circulation passage, and engine cooling water flows through the circulation passage. The water is cooled. Thereby, the steam pressure on the upstream side of the pressure regulating valve is reduced, and the amount of steam taken out via the pressure regulating valve can be reduced.

【0009】また、アフタークーリングを行なう際に分
岐通路と循環通路とを接続する流量調節弁を開くことに
より、循環通路を流れるエンジン冷却水の温度を下げ、
キャビテーションを防止することができる。
Furthermore, when performing aftercooling, by opening the flow rate control valve that connects the branch passage and the circulation passage, the temperature of the engine cooling water flowing through the circulation passage can be lowered.
Cavitation can be prevented.

【0010】0010

【実施例】以下、図面を参照して本発明の実施例を説明
する。
Embodiments Hereinafter, embodiments of the present invention will be described with reference to the drawings.

【0011】図1はコージュネレーションシステムにお
ける蒸気発生装置を示し、発電機(図示省略)を駆動す
るガスエンジン1と気水タンク2とを備えている。その
エンジン1と気水タンク2との間にエンジン冷却水の循
環通路3が設けられている。この循環通路3は、エンジ
ン1と気水タンク2とを接続する配管と、エンジン1の
シリンダブロック内の冷却水ジャケットとにより構成さ
れる。そのエンジン1は給気冷却用のインタークーラー
4と、潤滑油冷却用のオイルクーラー5とを備えている
FIG. 1 shows a steam generator in a cogeneration system, which includes a gas engine 1 that drives a generator (not shown) and a steam tank 2. An engine cooling water circulation passage 3 is provided between the engine 1 and the air water tank 2. This circulation passage 3 is constituted by piping connecting the engine 1 and the air/water tank 2, and a cooling water jacket in the cylinder block of the engine 1. The engine 1 includes an intercooler 4 for cooling air supply and an oil cooler 5 for cooling lubricating oil.

【0012】気水タンク2には蒸気取り出し用の配管5
が接続され、この配管5の途中に電動式圧力調節弁6が
設けられ、この圧力調節弁6を介し一定圧力(例えば1
.1kgf/cm2 )の蒸気が取り出される。また、
気水タンク2には冷却水の補充のための配管7が接続さ
れ、気水タンク2内の冷却水の水位がセンサー(図示省
略)により一定以下になったことが検知されると、ポン
プ8により図外冷却水タンクから冷却水が補充される。
The steam tank 2 is equipped with piping 5 for steam extraction.
is connected, and an electric pressure regulating valve 6 is provided in the middle of this piping 5, and a constant pressure (for example, 1
.. 1 kgf/cm2) of steam is extracted. Also,
A piping 7 for replenishing cooling water is connected to the air water tank 2, and when a sensor (not shown) detects that the level of cooling water in the air water tank 2 has fallen below a certain level, a pump 8 is activated. Cooling water is replenished from the cooling water tank (not shown).

【0013】循環通路3の途中には、冷却水を図中矢印
方向に循環させるためのポンプ9が設けられている。ま
た、循環通路3の途中には、エンジン1により昇温され
た冷却水の圧力を大気圧よりも大きくするためにオリフ
ィス10が設けられている。
A pump 9 is provided in the middle of the circulation passage 3 for circulating cooling water in the direction of the arrow in the figure. Further, an orifice 10 is provided in the middle of the circulation passage 3 in order to make the pressure of the cooling water heated by the engine 1 higher than atmospheric pressure.

【0014】エンジン1の下流側とオリフィス10の上
流側との間において、循環通路3から分岐する分岐通路
11が設けられている。この分岐通路11を流れるエン
ジン冷却水の冷却手段として熱交換器12が設けられて
いる。この熱交換器12は、前記インタークーラー4及
びオイルクーラー5の冷却水により分岐通路11を流れ
る冷却水を冷却する。なお、インタークーラー4、オイ
ルクーラー5および熱交換器12用の冷却水はポンプ1
3により通路14を循環し、この通路14を循環する冷
却水は、熱交換器15により冷却水タンク(図示省略)
より供給される冷却水により冷却される。
A branch passage 11 branching from the circulation passage 3 is provided between the downstream side of the engine 1 and the upstream side of the orifice 10. A heat exchanger 12 is provided as a cooling means for engine cooling water flowing through this branch passage 11. This heat exchanger 12 cools the cooling water flowing through the branch passage 11 with the cooling water of the intercooler 4 and oil cooler 5. In addition, the cooling water for the intercooler 4, oil cooler 5, and heat exchanger 12 is supplied to the pump 1.
3, and the cooling water circulating through the passage 14 is transferred to a cooling water tank (not shown) by a heat exchanger 15.
It is cooled by cooling water supplied by

【0015】そして、分岐通路11を流れる熱交換器1
2により冷却された冷却水を循環通路3に還流させるた
め、分岐通路11と循環通路3とが電動式の流量調節弁
16を介し接続されている。その流量調節弁16は循環
通路3を開閉すると共に循環通路3と分岐通路11とを
開閉する3方弁とされ、通常は循環通路3を全開とする
と共に循環通路3と分岐通路との間を全閉とする。
[0015] The heat exchanger 1 flowing through the branch passage 11
The branch passage 11 and the circulation passage 3 are connected via an electrically operated flow rate control valve 16 in order to circulate the cooling water cooled by the passage 2 into the circulation passage 3 . The flow rate control valve 16 is a three-way valve that opens and closes the circulation passage 3 and opens and closes the circulation passage 3 and the branch passage 11. Normally, the circulation passage 3 is fully opened and the flow rate between the circulation passage 3 and the branch passage 11 is opened and closed. Fully closed.

【0016】前記蒸気取出用配管5に、圧力調節弁6の
上流側において蒸気圧力検出用圧力センサー17が設け
られている。この圧力センサー17の検出蒸気圧力に応
じ、前記圧力調節弁6と流量調節弁16とが制御装置1
8により開度を調節される。その制御装置18は、例え
ばPID制御を行なうデジタル調節ユニットにより構成
される。
A pressure sensor 17 for detecting steam pressure is provided in the steam extraction pipe 5 upstream of the pressure regulating valve 6. According to the steam pressure detected by the pressure sensor 17, the pressure regulating valve 6 and the flow regulating valve 16 are controlled by the control device 1.
8 adjusts the opening degree. The control device 18 is constituted by, for example, a digital adjustment unit that performs PID control.

【0017】次に、制御装置18による流量調節弁16
と圧力調節弁6の制御を説明する。圧力センサー17の
検出蒸気圧力が予め設定した圧力よりも小さい場合は、
圧力調節弁6の開度を小さくし、圧力調節弁6を介して
取り出される蒸気圧力を設定圧力とする。また、圧力セ
ンサー17により検出した蒸気圧力が設定した圧力より
も大きい場合は、圧力調節弁6の開度を大きくし、圧力
調節弁6を介して取り出される蒸気圧力を設定圧力とす
る。
Next, the flow control valve 16 is controlled by the control device 18.
The control of the pressure regulating valve 6 will now be explained. If the detected steam pressure of the pressure sensor 17 is lower than the preset pressure,
The opening degree of the pressure regulating valve 6 is reduced, and the steam pressure taken out via the pressure regulating valve 6 is set as the set pressure. Further, when the steam pressure detected by the pressure sensor 17 is higher than the set pressure, the opening degree of the pressure regulating valve 6 is increased, and the steam pressure taken out via the pressure regulating valve 6 is set as the set pressure.

【0018】そして、圧力調節弁6を介し取り出される
蒸気使用量の減少等により、圧力調節弁6の開度を全開
としても、圧力センサー17による検出蒸気圧力が設定
圧力よりも大きい場合は、流量調節弁16を作動させる
ことで、熱交換器12により冷却された分岐通路11を
流れる冷却水を循環通路3に流入させる。これにより、
循環通路3を流れる冷却水の温度が低下するので発生蒸
気圧力が低下する。この流量調節弁16の開度は、圧力
センサー17の検出圧力に応じて定め、圧力センサー1
7による検出値が大きいほど分岐通路11から循環通路
3に流入する冷却水流量を多くする。
Even if the pressure regulating valve 6 is fully opened due to a decrease in the amount of steam taken out via the pressure regulating valve 6, if the steam pressure detected by the pressure sensor 17 is greater than the set pressure, the flow rate will be reduced. By operating the control valve 16, the cooling water flowing through the branch passage 11 cooled by the heat exchanger 12 is caused to flow into the circulation passage 3. This results in
Since the temperature of the cooling water flowing through the circulation passage 3 decreases, the generated steam pressure decreases. The opening degree of the flow rate regulating valve 16 is determined according to the detected pressure of the pressure sensor 17.
7, the flow rate of cooling water flowing from the branch passage 11 into the circulation passage 3 is increased.

【0019】また、エンジン1を停止した場合は、エン
ジン1の操作盤19からアフタークーリングの開始信号
が制御装置18に入力され、この信号により制御装置1
8は圧力調節弁6を全閉とし流量調節弁16を作動させ
る。これにより、アフタークーリング中においては分岐
通路11を流れる熱交換器12により冷却された冷却水
が循環通路3に流入し、循環通路3を流れるエンジン冷
却水温度が低下し、冷却水から気泡の発生するのが防止
され、アフタークーリング中やエンジンの再始動時にお
けるキャビテーションが防止される。なお、アフターク
ーリング時における流量調節弁16の開度は予め設定し
ておく。
Further, when the engine 1 is stopped, an aftercooling start signal is input from the operation panel 19 of the engine 1 to the control device 18, and this signal causes the control device 1 to
8 fully closes the pressure regulating valve 6 and operates the flow regulating valve 16. As a result, during aftercooling, the cooling water cooled by the heat exchanger 12 flowing through the branch passage 11 flows into the circulation passage 3, the temperature of the engine cooling water flowing through the circulation passage 3 decreases, and air bubbles are generated from the cooling water. cavitation during aftercooling or when restarting the engine. Note that the opening degree of the flow rate control valve 16 during aftercooling is set in advance.

【0020】なお、本発明は上記実施例に限定されるも
のではない。例えば、循環通路3と分岐通路11の接続
位置は任意のものとできる。また、分岐通路11を流れ
る冷却水の冷却手段として上記実施例では熱交換器12
を用いたが、エンジン冷却水を冷却できるものであれば
限定されない。
It should be noted that the present invention is not limited to the above embodiments. For example, the connection position between the circulation passage 3 and the branch passage 11 can be arbitrary. Further, in the above embodiment, a heat exchanger 12 is used as a means for cooling the cooling water flowing through the branch passage 11.
was used, but there is no limitation as long as it can cool the engine cooling water.

【0021】[0021]

【発明の効果】本発明によれば、循環通路と分岐通路と
を接続する流量調節弁の開度を調節することで、圧力調
節弁の上流側における圧力を上昇させることなく、気水
タンクから取り出される蒸気量を調節することができ、
余剰蒸気の回収装置を設ける必要がなくなる。また、ア
フタークーリングを行なう場合、分岐通路と循環通路と
を接続する流量調節弁を開くことにより、循環通路を流
れるエンジン冷却水温度を低減してキャビテーションを
防止できる。
Effects of the Invention According to the present invention, by adjusting the opening degree of the flow rate control valve that connects the circulation passage and the branch passage, air and water can be removed from the steam tank without increasing the pressure on the upstream side of the pressure control valve. The amount of steam extracted can be adjusted,
There is no need to provide a surplus steam recovery device. Furthermore, when performing aftercooling, by opening the flow rate control valve that connects the branch passage and the circulation passage, the temperature of the engine cooling water flowing through the circulation passage can be reduced and cavitation can be prevented.

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

【図1】本発明の実施例に係る蒸気発生装置の構成説明
FIG. 1 is an explanatory diagram of the configuration of a steam generator according to an embodiment of the present invention.

【図2】従来の蒸気発生装置の構成説明図[Figure 2] Explanatory diagram of the configuration of a conventional steam generator

【符号の説明】[Explanation of symbols]

1  エンジン 2  気水タンク 3  循環通路 6  圧力調節弁 11  分岐通路 12  熱交換器 16  流量調節弁 1 Engine 2 Air water tank 3 Circulation passage 6 Pressure control valve 11 Branch passage 12 Heat exchanger 16 Flow control valve

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】  エンジンと気水タンクとの間にエンジ
ン冷却水の循環通路が設けられ、その気水タンクから蒸
気が圧力調節弁を介し取り出される蒸気発生装置におい
て、前記循環通路から分岐する分岐通路が設けられ、こ
の分岐通路を流れるエンジン冷却水の冷却手段が設けら
れ、この冷却手段により冷却されたエンジン冷却水が流
れる分岐通路と前記循環通路とが流量調節弁を介し接続
されることを特徴とする蒸気発生装置。
1. A steam generator in which an engine cooling water circulation passage is provided between an engine and a steam tank, and steam is taken out from the steam tank via a pressure control valve, wherein a branch branches from the circulation passage. A passage is provided, a cooling means for engine cooling water flowing through the branch passage is provided, and the branch passage through which the engine cooling water cooled by the cooling means flows and the circulation passage are connected via a flow rate regulating valve. Characteristic steam generator.
JP12500191A 1991-04-25 1991-04-25 Steam generator Pending JPH04327701A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12500191A JPH04327701A (en) 1991-04-25 1991-04-25 Steam generator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12500191A JPH04327701A (en) 1991-04-25 1991-04-25 Steam generator

Publications (1)

Publication Number Publication Date
JPH04327701A true JPH04327701A (en) 1992-11-17

Family

ID=14899426

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12500191A Pending JPH04327701A (en) 1991-04-25 1991-04-25 Steam generator

Country Status (1)

Country Link
JP (1) JPH04327701A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0525102U (en) * 1991-05-09 1993-04-02 神鋼造機株式会社 Circulating water loss prevention device for steam generator
JP2007205657A (en) * 2006-02-02 2007-08-16 Hitachi Ltd Steam generation device utilizing low temperature waste heat and cogeneration device using the device
JP2014089001A (en) * 2012-10-30 2014-05-15 Miura Co Ltd Steam recovery system

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0525102U (en) * 1991-05-09 1993-04-02 神鋼造機株式会社 Circulating water loss prevention device for steam generator
JP2007205657A (en) * 2006-02-02 2007-08-16 Hitachi Ltd Steam generation device utilizing low temperature waste heat and cogeneration device using the device
JP4555784B2 (en) * 2006-02-02 2010-10-06 株式会社日立製作所 Steam generating apparatus using low-temperature waste heat, thermoelectric supply apparatus using the apparatus, and steam generating method
JP2014089001A (en) * 2012-10-30 2014-05-15 Miura Co Ltd Steam recovery system

Similar Documents

Publication Publication Date Title
JP4572131B2 (en) Engine variable separation cooling structure and engine cooling system
JP2007107522A (en) Cooling system for combustion engine
JP3619429B2 (en) Diesel engine air supply temperature controller
JPH04327701A (en) Steam generator
JPH0629035A (en) Co-operative control device of fuel cell power-generation plant and waste heat collection system
JPH07113110A (en) Device for recovering heat in converter and control method thereof
US2208157A (en) System for recovering and utilizing waste heat
JP2001271644A (en) Method and device for adjusting engine oil temperature
JP3319662B2 (en) Heat storage type cooling / heating device and control method thereof
KR101817949B1 (en) Engine warm-up system and method using the exhaust heat recovery device
JPS6142190B2 (en)
JPS60248945A (en) Hot water supplying device
KR20200068399A (en) Intercooler Heat Exchanger OnOff Device for Testing of Automission and Control Method thereof
JPS6310431Y2 (en)
US1107368A (en) Utilization of the waste heat of combustion-motors for heating purposes.
JPH0248783Y2 (en)
JPH0612205Y2 (en) Combined heat and power equipment
JPH01155021A (en) Exhaust heat recovering device for water cooled engine
JP2017096167A (en) Engine cooling device
JPH0618629U (en) Engine scavenging temperature adjustment equipment
JP2602090Y2 (en) Air temperature setting device for wind tunnel equipment
CN105702306A (en) Open type cooling water anti-overcooling system and open type cooling water anti-overcooling method for nuclear power plant
JPH07100224B2 (en) Mold temperature control method and apparatus
JPH04140406A (en) Heat recovering device for condenser cooling water
SU1506174A1 (en) System for feeding hot water to a boiler and method of operation same in starting and stopping modes of the pump