JPH09137910A - Low pressure steam heater by heat medium - Google Patents

Low pressure steam heater by heat medium

Info

Publication number
JPH09137910A
JPH09137910A JP32219595A JP32219595A JPH09137910A JP H09137910 A JPH09137910 A JP H09137910A JP 32219595 A JP32219595 A JP 32219595A JP 32219595 A JP32219595 A JP 32219595A JP H09137910 A JPH09137910 A JP H09137910A
Authority
JP
Japan
Prior art keywords
tank
heat medium
piston
pressure
heat
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.)
Granted
Application number
JP32219595A
Other languages
Japanese (ja)
Other versions
JP3806458B2 (en
Inventor
Shusaku Yoshikawa
周作 吉川
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.)
TLV Co Ltd
Original Assignee
TLV 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 TLV Co Ltd filed Critical TLV Co Ltd
Priority to JP32219595A priority Critical patent/JP3806458B2/en
Publication of JPH09137910A publication Critical patent/JPH09137910A/en
Application granted granted Critical
Publication of JP3806458B2 publication Critical patent/JP3806458B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

PROBLEM TO BE SOLVED: To prevent the denaturalizing of a heat medium caused by the oxidization and the leakage of odor of the heat medium outside by connecting a sub tank for absorbing an internal pressure of the tank associated with changes in the liquid level within the tank to keep the tank closed. SOLUTION: A sub tank 36 is arranged at an upper part of a tank 21 through a connection pipeline 31. The sub tank 36 is provided inside with a piston 37 movable vertically and a lower chamber 38 of the piston is made to communicate with the inside of the tank 21. The lower piston chamber 38 and the tank 21 are filled with an inert gas such as nitrogen gas. As a liquid level of a heat medium 27 in the tank 21 rises, the capacity of the upper part of the tank 21 varies and the piston 37 in the sub tank 36 ascends according to changes thereof so that the pressure in the tank 21 is kept almost equal to that in the piston lower chamber 38. The lower chamber 38 of the piston and the upper part of the tank 21 are filled with an inert gas to keep the heat medium 27 contacting air.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【発明の属する技術分野】本発明は、熱媒体の蒸気によ
って被加熱物を加熱するものに関し、石油化学工業や合
成繊維工業、あるいは、合成樹脂工業等の各種加熱工程
に使用される熱媒体による蒸気加熱装置に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heating medium for heating an object to be heated by steam of a heating medium, which is used in various heating processes in the petrochemical industry, the synthetic fiber industry, the synthetic resin industry and the like. The present invention relates to a steam heating device.

【0002】[0002]

【従来の技術】従来の熱媒体による蒸気加熱装置の例と
しては、例えば図2に示すようなものが用いられてい
た。これは、熱媒体の蒸発器としての熱媒体用ボイラ―
1で発生させた熱媒体蒸気を、熱交換器の一種である反
応釜2に供給して反応釜2内の被加熱物を加熱し、加熱
により凝縮した熱媒体蒸気の凝縮液をタンク3に流下さ
せ、循環ポンプ4でボイラ―1へ回収するものである。
2. Description of the Related Art As an example of a conventional steam heating apparatus using a heat medium, for example, one shown in FIG. 2 has been used. This is a boiler for heat carrier as an evaporator of heat carrier.
The heat medium vapor generated in 1 is supplied to the reaction vessel 2 which is a kind of heat exchanger to heat the object to be heated in the reaction vessel 2, and the condensate of the heat medium vapor condensed by heating is stored in the tank 3. It is made to flow down and is collected in the boiler 1 by the circulation pump 4.

【0003】熱媒体は様々な種類のものが市販され用い
られているが、通常の水を沸騰させた水蒸気よりも、圧
力が低くて温度が高いものが一般的であり、加熱装置を
高耐圧力設計とすることなく、比較的高温で加熱するこ
とができるものであり、各種の加熱工程で多用されてい
る。
Although various kinds of heat mediums are commercially available and used, those having a lower pressure and a higher temperature are generally used as compared with the steam generated by boiling normal water, and the heating device is highly resistant to heat. It can be heated at a relatively high temperature without pressure design, and is widely used in various heating processes.

【0004】[0004]

【発明が解決しようとする課題】上記従来の熱媒体によ
る蒸気加熱装置を用いた場合、タンク内で熱媒体が空気
と接触することによって酸化し変質する問題があった。
また、気化した熱媒体が外部に漏れることにより、熱媒
体の臭気が周辺に漂う問題があった。
When the above-described conventional steam heating device using a heat medium is used, there is a problem that the heat medium is oxidized and deteriorated due to contact with the air in the tank.
In addition, there is a problem that the odor of the heat medium drifts around due to the vaporized heat medium leaking to the outside.

【0005】従って本発明の技術的課題は、不凝縮ガス
による熱交換性能の低下を生じることのない、熱媒体に
よる低圧蒸気加熱装置を得ることである。
Therefore, a technical object of the present invention is to obtain a low-pressure steam heating device using a heat medium, which does not cause deterioration of heat exchange performance due to noncondensable gas.

【0006】[0006]

【課題を解決するための手段】上記の技術的課題を解決
するために講じた本発明の技術的手段は、熱交換器の一
次側に熱媒体の蒸気供給管を接続し、熱交換器で凝縮し
た熱媒体を蒸発器等の回収先に回収するものにおいて、
熱交換器の二次側にエゼクタ―とタンクと循環ポンプを
有する真空ポンプを連設して、当該エゼクタ―と熱交換
器を接続すると共に、タンク内の液位の変化に伴うタン
ク内圧を吸収するサブタンクを上記タンクと接続したも
のである。
Means for Solving the Problems The technical means of the present invention taken to solve the above-mentioned technical problem is to connect a steam supply pipe of a heat medium to a primary side of a heat exchanger, In the one that collects the condensed heat medium to the collection destination such as an evaporator,
A vacuum pump having an ejector, a tank and a circulation pump is connected to the secondary side of the heat exchanger to connect the ejector to the heat exchanger and absorb the tank internal pressure due to the change in the liquid level in the tank. The sub-tank is connected to the above tank.

【0007】[0007]

【発明の実施の形態】熱交換器の二次側にエゼクタ―と
タンクと循環ポンプを有する真空ポンプを連設して、エ
ゼクタ―と熱交換器を接続したことにより、エゼクタ―
の吸引力によって熱交換器内を大気圧前後の低圧状態に
維持することができ、低圧の熱媒体蒸気でもって被加熱
物を加熱することができる。
BEST MODE FOR CARRYING OUT THE INVENTION An ejector, a tank, and a vacuum pump having a circulation pump are continuously provided on the secondary side of a heat exchanger, and the ejector and the heat exchanger are connected to each other.
By the suction force of 1, the inside of the heat exchanger can be maintained in a low pressure state around atmospheric pressure, and the object to be heated can be heated by the heat medium vapor of low pressure.

【0008】タンクにサブタンクを接続したことによ
り、タンクを密閉状としてもタンク内の液位の変化に伴
う圧力変動をサブタンクで吸収することができる。従っ
て、密閉タンク内の熱媒体は空気と接触することがない
と共に、熱媒体の臭気が外部へ漏れ出ることもない。
By connecting the sub tank to the tank, it is possible to absorb the pressure fluctuation due to the change of the liquid level in the tank even when the tank is hermetically sealed. Therefore, the heat medium in the closed tank does not come into contact with air, and the odor of the heat medium does not leak to the outside.

【0009】[0009]

【実施例】上記の技術的手段の具体例を示す実施例を説
明する(図1参照)。本実施例においては熱交換器とし
て反応釜2を用いた例を示し、図2の従来技術と同一部
材には同一符号を付す。
An embodiment showing a specific example of the above technical means will be described (see FIG. 1). In this embodiment, an example in which the reaction kettle 2 is used as a heat exchanger is shown, and the same members as those in the prior art shown in FIG.

【0010】蒸発器としての熱媒体用ボイラ―1を反応
釜2のジャケット部6と接続すると共に、ジャケット部
6の下部を真空ポンプ手段7と連設し、真空ポンプ手段
7をタンク3と循環ポンプ4を介して熱媒体用ボイラ―
1と接続して、熱媒体による低圧蒸気加熱装置を構成す
る。
The heat medium boiler 1 as an evaporator is connected to the jacket portion 6 of the reaction kettle 2 and the lower portion of the jacket portion 6 is connected to the vacuum pump means 7 so that the vacuum pump means 7 is circulated with the tank 3. Boiler for heat medium via pump 4
1 to form a low-pressure steam heating device using a heat medium.

【0011】熱媒体用ボイラ―1と反応釜2を、圧力調
整弁8と気液分離器9と圧力センサ―10を介した加熱
用蒸気供給管11で接続する。圧力調整弁8は、圧力セ
ンサ―10で検出した加熱用蒸気供給管11内の蒸気圧
力を所定値に調整するものであり、気液分離器9は加熱
用蒸気供給管11内の熱媒体の蒸気と液体を分離し、分
離した蒸気だけを反応釜2のジャケット部6へ供給し、
液体をその下部に設けたスチ―ムトラップ12から排出
するものである。気液分離器9としては、衝突式や遠心
式やフィルタ―式等のものを用いることができる。
The heating medium boiler 1 and the reaction vessel 2 are connected by a pressure adjusting valve 8, a gas-liquid separator 9 and a heating steam supply pipe 11 via a pressure sensor 10. The pressure adjusting valve 8 adjusts the steam pressure in the heating steam supply pipe 11 detected by the pressure sensor 10 to a predetermined value, and the gas-liquid separator 9 controls the heat medium in the heating steam supply pipe 11. The vapor and the liquid are separated, and only the separated vapor is supplied to the jacket portion 6 of the reaction kettle 2,
The liquid is discharged from the steam trap 12 provided below the liquid. The gas-liquid separator 9 may be of a collision type, a centrifugal type, a filter type, or the like.

【0012】反応釜2の外周に配置したジャケット部6
の下部接続口13を、スチ―ムトラップ14とバイパス
バルブ15を並行に設けた管路16で、真空ポンプ手段
7のエゼクタ―20と接続する。また、気液分離器9の
スチ―ムトラップ12の出口を、管路17を介してエゼ
クタ―20と接続する。
A jacket portion 6 arranged on the outer periphery of the reaction kettle 2.
The lower connection port 13 is connected to the ejector 20 of the vacuum pump means 7 by a pipe line 16 in which a steam trap 14 and a bypass valve 15 are provided in parallel. Further, the outlet of the steam trap 12 of the gas-liquid separator 9 is connected to the ejector 20 via the conduit 17.

【0013】真空ポンプ手段7は、エゼクタ―20とタ
ンク21と循環ポンプ22、及び、接続管路23とで構
成する。エゼクタ―20は、ノズル部25とディフュ―
ザ部26で形成する。タンク21には、内部に溜った熱
媒体27を冷却するための冷却管28を調節弁29を介
して取り付けると共に、下部には熱媒体27の流体温度
を検出するための温度センサ―30を取り付け、図示は
していないが温度センサ―30と調節弁29を温度コン
トロ―ラ―を介して接続して、熱媒体27の温度を所定
値に維持できるようにする。
The vacuum pump means 7 is composed of an ejector 20, a tank 21, a circulation pump 22 and a connecting conduit 23. The ejector 20 has a nozzle portion 25 and a diffuser.
It is formed by the section 26. A cooling pipe 28 for cooling the heat medium 27 accumulated inside is attached to the tank 21 via a control valve 29, and a temperature sensor 30 for detecting the fluid temperature of the heat medium 27 is attached to the lower part. Although not shown, the temperature sensor 30 and the control valve 29 are connected via a temperature controller so that the temperature of the heat medium 27 can be maintained at a predetermined value.

【0014】タンク21の上部に接続管路31を介して
サブタンク36を配置する。サブタンク36は、内部に
上下動可能に円板状のピストン37を設けてピストン下
部室38をタンク21内と連通する。ピストン下部室3
8内とタンク21内は窒素ガス等の不活性気体を充満さ
せる。サブタンク36の上部は開口39により大気と連
通させる。サブタンク36の下部には窒素ガス補給管4
0をバルブ41を介して接続する。
A sub-tank 36 is arranged above the tank 21 via a connecting pipe 31. The sub-tank 36 is provided with a disc-shaped piston 37 movably up and down, and connects the piston lower chamber 38 to the inside of the tank 21. Piston lower chamber 3
8 and the tank 21 are filled with an inert gas such as nitrogen gas. The upper portion of the sub tank 36 is communicated with the atmosphere through the opening 39. At the bottom of the sub tank 36, there is a nitrogen gas supply pipe 4
0 is connected via the valve 41.

【0015】真空ポンプ手段7は、循環ポンプ22でタ
ンク21内の熱媒体27をエゼクタ―20中に循環させ
て、エゼクタ―20のノズル部25で吸引力を発生し、
反応釜2のジャケット部6から熱媒体を吸引すると共
に、ジャケット部6内を所定の圧力状態に維持するもの
である。
The vacuum pump means 7 circulates the heat medium 27 in the tank 21 through the ejector 20 by means of the circulation pump 22 to generate suction force at the nozzle portion 25 of the ejector 20.
The heat medium is sucked from the jacket portion 6 of the reaction vessel 2 and the inside of the jacket portion 6 is maintained at a predetermined pressure state.

【0016】真空ポンプ手段7の接続管路23の一部を
分岐して管路32を接続し、循環熱媒体の一部が管路3
3からタンク3へ供給されるようにすると共に、更に管
路35を接続して循環熱媒体の一部を加熱用蒸気供給管
11中で気液分離器9の一次側に注入する。管路35に
より、圧力調整弁8で圧力調整された熱媒体蒸気が過熱
蒸気となった場合でも、循環熱媒体の一部を注入して気
液分離部9で熱交換させることにより、飽和温度蒸気と
することができるものである。
A part of the connecting pipe line 23 of the vacuum pump means 7 is branched to connect the pipe line 32, and a part of the circulating heat medium is supplied to the pipe line 3.
3 is supplied to the tank 3, and a pipe 35 is further connected to inject a part of the circulating heat medium into the primary side of the gas-liquid separator 9 in the heating vapor supply pipe 11. Even when the heat transfer medium whose pressure is adjusted by the pressure adjusting valve 8 by the pipe line 35 becomes superheated steam, a part of the circulating heat transfer medium is injected and heat is exchanged in the gas-liquid separation unit 9 to obtain the saturation temperature. It can be steam.

【0017】次に作用を説明する。熱媒体用ボイラ―1
で発生した熱媒体蒸気は、圧力調整弁8を経て圧力調整
されて反応釜2のジャケット部6に供給される。ジャケ
ット部6内は、真空ポンプ手段7のエゼクタ―20の吸
引力により予め所定の低圧状態となっており、ジャケッ
ト部6に供給された熱媒体蒸気は、所定の圧力すなわち
蒸気温度となって反応釜2内の被加熱物を加熱する。加
熱して熱を奪われた熱媒体蒸気は凝縮して液体となり、
スチ―ムトラップ14を経てエゼクタ―20に吸引さ
れ、タンク21に至る。
Next, the operation will be described. Boiler for heat medium-1
The heat medium vapor generated in 1 is supplied to the jacket portion 6 of the reaction vessel 2 after being pressure-adjusted via the pressure adjustment valve 8. The inside of the jacket portion 6 is in a predetermined low pressure state due to the suction force of the ejector 20 of the vacuum pump means 7, and the heat medium vapor supplied to the jacket portion 6 becomes a predetermined pressure, that is, the vapor temperature and reacts. The object to be heated in the kettle 2 is heated. The heat medium vapor that has been heated and deprived of heat condenses into a liquid,
The ejector 20 is sucked through the steam trap 14 and reaches the tank 21.

【0018】タンク21内の熱媒体27は、冷却管28
で所定温度まで冷却されて循環ポンプ22でエゼクタ―
20へ供給され、再度ジャケット部6内の熱媒体を吸引
する。エゼクタ―20で生じる吸引力は、エゼクタ―2
0内を通過する流体の温度によって決まるために、タン
ク21内の熱媒体27の液温を適宜調節することによ
り、エゼクタ―20の吸引力すなわち減圧度合を制御す
ることができる。エゼクタ―20の吸引力を制御するこ
とにより、ジャケット部6内の圧力状態を制御すること
ができ、大気圧以下の負圧状態から、大気圧以上の正圧
状態までジャケット部6内の圧力を制御することができ
る。
The heat medium 27 in the tank 21 is a cooling pipe 28.
Is cooled to a predetermined temperature by the circulation pump 22 and ejector
Then, the heat medium in the jacket portion 6 is sucked again. The suction force generated by the ejector 20 is equal to the ejector 2
Since it is determined by the temperature of the fluid passing through 0, the suction force of the ejector 20, that is, the degree of pressure reduction can be controlled by appropriately adjusting the liquid temperature of the heat medium 27 in the tank 21. By controlling the suction force of the ejector 20, the pressure state inside the jacket portion 6 can be controlled, and the pressure inside the jacket portion 6 can be changed from a negative pressure state below atmospheric pressure to a positive pressure state above atmospheric pressure. Can be controlled.

【0019】タンク21内の熱媒体27の液位が上昇す
ると、タンク21上部の容積が変化し、その変化に応じ
てサブタンク36内のピストン37が上昇することによ
って、タンク21内の圧力とピストン下部室38の圧力
をほぼ同等に保つ。ピストン下部室38とタンク21の
上部には窒素ガス等の不活性気体を充満していることに
より、熱媒体27が空気と接触することはない。
When the liquid level of the heat medium 27 in the tank 21 rises, the volume of the upper portion of the tank 21 changes, and the piston 37 in the sub tank 36 rises in accordance with the change, whereby the pressure in the tank 21 and the piston The pressure in the lower chamber 38 is kept approximately equal. Since the piston lower chamber 38 and the upper portion of the tank 21 are filled with an inert gas such as nitrogen gas, the heat medium 27 does not come into contact with air.

【0020】熱媒体として例えば商品名でダウサムなる
ものを用いた場合、蒸気圧力を絶対圧で0.3キロとす
るとその蒸気温度は約210度Cとなり、1.1キロと
すると約260度Cとすることができ、蒸気圧力を制御
することによって、蒸気温度を制御することができるの
である。
For example, when a product named Dowsum is used as the heat medium, the steam temperature becomes about 210 ° C. when the steam pressure is 0.3 kg in absolute pressure, and about 260 ° C. when it is 1.1 km. The steam temperature can be controlled by controlling the steam pressure.

【0021】本実施例においては、熱交換器として反応
釜2を用いた例を示したが、その他の熱交換器、例えば
合成繊維や合成樹脂、あるいは、食料品や医療品等の熱
交換器としても用いることができるものである。
In this embodiment, the reaction vessel 2 is used as the heat exchanger, but other heat exchangers such as synthetic fibers and synthetic resins, heat exchangers for food and medical products, etc. Can also be used as.

【0022】[0022]

【発明の効果】上記のように本発明によれば、サブタン
クを設けてタンクを密閉状としたことにより、熱媒体が
空気と接触することを無くして熱媒体の酸化による変質
を防止することができると共に、外部に熱媒体の臭気が
漂うことも防止できる、熱媒体による低圧蒸気加熱装置
を得ることができる。
As described above, according to the present invention, since the sub-tank is provided and the tank is hermetically sealed, it is possible to prevent the heat medium from coming into contact with air and prevent the heat medium from being deteriorated due to oxidation. It is possible to obtain a low-pressure steam heating device using a heat medium that can prevent the odor of the heat medium from drifting outside.

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

【図1】本発明の熱媒体による低圧蒸気加熱装置の実施
例を示す構成図である。
FIG. 1 is a configuration diagram showing an embodiment of a low-pressure steam heating device using a heat medium according to the present invention.

【図2】従来の熱媒体による蒸気加熱装置を示す構成図
である。
FIG. 2 is a configuration diagram showing a conventional steam heating device using a heat medium.

【符号の説明】[Explanation of symbols]

1 熱媒体用ボイラ― 2 反応釜 6 ジャケット部 7 真空ポンプ手段 20 エゼクタ― 21 タンク 22 循環ポンプ 31 接続管路 36 サブタンク 37 ピストン 38 ピストン下部室 1 Heat Medium Boiler 2 Reactor 6 Jacket 7 Vacuum Pump Means 20 Ejector 21 Tank 22 Circulation Pump 31 Connection Pipeline 36 Sub Tank 37 Piston 38 Lower Piston Chamber

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 熱交換器の一次側に熱媒体の蒸気供給管
を接続し、熱交換器で凝縮した熱媒体を蒸発器等の回収
先に回収するものにおいて、熱交換器の二次側にエゼク
タ―とタンクと循環ポンプを有する真空ポンプを連設し
て、当該エゼクタ―と熱交換器を接続すると共に、タン
ク内の液位の変化に伴うタンク内圧を吸収するサブタン
クを上記タンクと接続したことを特徴とする熱媒体によ
る低圧蒸気加熱装置。
1. A secondary side of a heat exchanger in which a steam supply pipe for a heat medium is connected to a primary side of the heat exchanger and the heat medium condensed by the heat exchanger is recovered to a recovery destination such as an evaporator. A vacuum pump having an ejector, a tank, and a circulation pump is connected in series to connect the ejector and the heat exchanger, and a sub tank that absorbs the tank internal pressure due to the change in the liquid level in the tank is connected to the tank. A low-pressure steam heating device using a heat medium.
JP32219595A 1995-11-15 1995-11-15 Low pressure steam heating device using heat medium Expired - Fee Related JP3806458B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP32219595A JP3806458B2 (en) 1995-11-15 1995-11-15 Low pressure steam heating device using heat medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP32219595A JP3806458B2 (en) 1995-11-15 1995-11-15 Low pressure steam heating device using heat medium

Publications (2)

Publication Number Publication Date
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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009189981A (en) * 2008-02-15 2009-08-27 Tlv Co Ltd Vacuum steam heating apparatus
JP2010164237A (en) * 2009-01-15 2010-07-29 Tlv Co Ltd Condensate returning device
JP2010164236A (en) * 2009-01-15 2010-07-29 Tlv Co Ltd Condensate returning device
JP2010164234A (en) * 2009-01-15 2010-07-29 Tlv Co Ltd Condensate returning device
JP2010164235A (en) * 2009-01-15 2010-07-29 Tlv Co Ltd Condensate returning device
JP2014009841A (en) * 2012-06-28 2014-01-20 Tlv Co Ltd Re-evaporation apparatus for condensate

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009189981A (en) * 2008-02-15 2009-08-27 Tlv Co Ltd Vacuum steam heating apparatus
JP2010164237A (en) * 2009-01-15 2010-07-29 Tlv Co Ltd Condensate returning device
JP2010164236A (en) * 2009-01-15 2010-07-29 Tlv Co Ltd Condensate returning device
JP2010164234A (en) * 2009-01-15 2010-07-29 Tlv Co Ltd Condensate returning device
JP2010164235A (en) * 2009-01-15 2010-07-29 Tlv Co Ltd Condensate returning device
JP2014009841A (en) * 2012-06-28 2014-01-20 Tlv Co Ltd Re-evaporation apparatus for condensate

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