JP2010094595A

JP2010094595A - Reduced-pressure steam-heating apparatus

Info

Publication number: JP2010094595A
Application number: JP2008266608A
Authority: JP
Inventors: Tadaaki Kumamoto; 匡章隈元
Original assignee: TLV Co Ltd
Current assignee: TLV Co Ltd
Priority date: 2008-10-15
Filing date: 2008-10-15
Publication date: 2010-04-30

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a reduced-pressure steam-heating apparatus capable of uniformly heating the entire heat exchanger. <P>SOLUTION: A steam supply pipe 3 is connected to a jacket section 11 of a reaction vessel 1. A steam pressure control valve 7 is attached to the steam supply pipe 3. A vacuum suction means 2 is allowed to communicate with a lower part of the jacket section 11. The vacuum suction means includes an ejector 14, a tank 5, and a circulation pump 15. A steam exhaust outlet 4, a temperature responsive valve 6, and an air vent valve 20 are attached to the right-hand side of the jacket section 11 to connect each lower end thereof to the ejector 14. A stream of the steam may be forcibly formed inside the jacket section 11, thereby enabling the system to uniformly supply the steam into the entire jacket section 11, by allowing the temperature responsive valve 6 to be opened if a required amount of the steam is not supplied to the right-hand side of the jacket section 11. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、熱交換器内の被加熱物を低圧蒸気で加熱するものに関し、特にその加熱蒸気温度が１００℃程度の比較的低温の場合に適した減圧蒸気加熱装置に関する。 The present invention relates to an apparatus for heating an object to be heated in a heat exchanger with low-pressure steam, and more particularly to a reduced-pressure steam heating apparatus suitable when the heating steam temperature is a relatively low temperature of about 100 ° C.

従来の減圧蒸気加熱装置は、熱交換器と、この熱交換器に加熱用の蒸気を供給する蒸気供給管と、熱交換器内の流体を吸引する吸引手段を接続し、熱交換器と吸引手段の間に気体と液体を分離する気液分離器を配置したもので、吸引効率を高く維持することができるものである。 A conventional vacuum steam heating apparatus is connected to a heat exchanger, a steam supply pipe for supplying heating steam to the heat exchanger, and a suction means for sucking a fluid in the heat exchanger. A gas-liquid separator that separates gas and liquid is disposed between the means, and the suction efficiency can be maintained high.

上記従来の減圧蒸気加熱装置では、熱交換器を複数の回転円板１０，１１で構成するものであるが、蒸気供給管２から供給される蒸気の圧力が低かったり、あるいは、供給蒸気量が少ない場合に、この複数の回転円板１０，１１の全体に供給蒸気が行き渡らずに、回転円板１０，１１の全体を均一に加熱することができない問題があった。
特開２００５−３７０４６号公報 In the conventional reduced pressure steam heating apparatus, the heat exchanger is constituted by a plurality of rotating disks 10 and 11, but the pressure of steam supplied from the steam supply pipe 2 is low or the amount of supplied steam is low. When the number of the rotating disks 10 and 11 is small, the supply steam does not spread over the entire rotating disks 10 and 11, and the entire rotating disks 10 and 11 cannot be uniformly heated.
JP 2005-37046 A

解決しようとする課題は、熱交換器の全体にムラなく供給蒸気が行き渡るようにして、熱交換器の全体を均一に加熱することのできる減圧蒸気加熱装置を得ることである。 The problem to be solved is to obtain a reduced-pressure steam heating device that can uniformly heat the entire heat exchanger so that the supply steam can be distributed evenly throughout the heat exchanger.

本発明は、被熱交換物を収納する熱交換器と、当該熱交換器に加熱用の蒸気を供給する蒸気供給管と、熱交換器内の流体を吸引する真空吸引手段を接続したものにおいて、蒸気供給管から熱交換器へ供給される蒸気が、熱交換器内の行き渡らない箇所に、蒸気排出口と空気抜弁を取り付けて、当該蒸気排出口に熱交換器内の温度が所定値よりも低下すると開弁し、所定値よりも上昇すると閉弁する温度応動弁を取り付けて、熱交換器内の全体に蒸気が供給されるようにしたものである。 In the present invention, a heat exchanger for storing a heat exchange object, a steam supply pipe for supplying heating steam to the heat exchanger, and a vacuum suction means for sucking a fluid in the heat exchanger are connected. A steam exhaust port and an air vent valve are installed at a location where the steam supplied from the steam supply pipe to the heat exchanger does not reach the inside of the heat exchanger, and the temperature inside the heat exchanger exceeds the predetermined value at the steam exhaust port. A temperature responsive valve is attached that opens when the pressure decreases, and closes when the pressure rises above a predetermined value, so that steam is supplied to the entire heat exchanger.

本発明は、供給蒸気の行き渡らない箇所に、蒸気排出口を形成して温度応動弁を取り付けたことによって、蒸気が行き渡らずに熱交換器内の温度が所定値よりも低い場合に、温度応動弁が開弁して熱交換器内の蒸気供給部から蒸気排出口と温度応動弁へ強制的に蒸気の流れを作り出すことができ、熱交換器の全体に蒸気を供給でき、熱交換器の全体を均一に加熱することができる。また、空気抜弁を取り付けたことにより、熱交換を妨げる余分な空気を排除することができる。 According to the present invention, when the temperature inside the heat exchanger is lower than a predetermined value without steam spreading by forming a steam discharge port and attaching a temperature-responsive valve at a place where supply steam does not spread, The valve opens to force the steam flow from the steam supply section in the heat exchanger to the steam outlet and the temperature responsive valve, supply steam to the whole heat exchanger, The whole can be heated uniformly. Further, by attaching the air vent valve, it is possible to eliminate excess air that hinders heat exchange.

本発明は、熱交換器内の蒸気の行き渡らない箇所に蒸気排出口を形成して温度応動弁を取り付けるものであるが、この温度応動弁は、内部にバイメタルや形状記憶合金、あるいは、感温液を封入したベローズ等を取り付けた自力式の温度応動弁が好適である。 The present invention is to attach a temperature responsive valve by forming a steam outlet at a location where steam does not spread in the heat exchanger, and this temperature responsive valve has a bimetal, a shape memory alloy, or a temperature sensitive inside. A self-acting temperature responsive valve equipped with a bellows or the like enclosing a liquid is suitable.

図１において、熱交換器としての反応釜１と吸引手段２と加熱用の蒸気供給管３、及び、蒸気排出口４と空気抜弁２０とで減圧蒸気加熱装置を構成する。 In FIG. 1, a reaction kettle 1 as a heat exchanger, a suction means 2, a heating steam supply pipe 3, a steam outlet 4 and an air vent valve 20 constitute a reduced pressure steam heating apparatus.

蒸気供給管３は図示しないボイラー等の蒸気源と接続すると共に、蒸気圧力調節弁７を取り付けて、熱交換器としての反応釜１のジャケット部１１と接続する。 The steam supply pipe 3 is connected to a steam source such as a boiler (not shown), and a steam pressure control valve 7 is attached to be connected to the jacket portion 11 of the reaction kettle 1 as a heat exchanger.

反応釜１のジャケット部１１の下端を、蒸気トラップ１２とバルブ１３を介して吸引手段２のエゼクタ１４と接続する。吸引手段２は、エゼクタ１４とタンク５と循環ポンプ１５に循環路１６を介して接続した組み合わせポンプとして構成する。エゼクタ１４はタンク５内の流体を循環ポンプ１５で循環して通過させることにより、その流体温度に応じた吸引力を生じるものである。 The lower end of the jacket portion 11 of the reaction kettle 1 is connected to the ejector 14 of the suction means 2 through a steam trap 12 and a valve 13. The suction means 2 is configured as a combination pump connected to the ejector 14, the tank 5, and the circulation pump 15 via the circulation path 16. The ejector 14 causes the fluid in the tank 5 to circulate and pass through the circulation pump 15, thereby generating a suction force according to the fluid temperature.

循管路１６を分岐して余剰流体排出管９を連通する。余剰流体排出管９には開閉弁１０を取り付けて、図示しないタンク５内のレベル計と連動してタンク５内の液位を所定レベルに維持する。 The circulation path 16 is branched and the surplus fluid discharge pipe 9 is communicated. An open / close valve 10 is attached to the surplus fluid discharge pipe 9 to maintain the liquid level in the tank 5 at a predetermined level in conjunction with a level meter in the tank 5 (not shown).

反応釜１のジャケット部１１の右側に蒸気排出口４を形成する。蒸気排出口４は、自力式の温度応動弁６を介在して、エゼクタ１４と接続する。温度応動弁６は、感温部材としてのバイメタルを内蔵しており、蒸気排出口４内の流体温度が所定値よりも低い場合に自動的に開弁してジャケット部１１とエゼクタ１４を連通し、一方、流体温度が所定値よりも高くなると自動的に閉弁するものである。ジャケット部１１の右側上部に空気抜弁２０を取り付ける。空気抜弁２０の出口側は、管路２１でエゼクタ１４と接続する。 A steam outlet 4 is formed on the right side of the jacket portion 11 of the reaction kettle 1. The steam outlet 4 is connected to the ejector 14 via a self-acting temperature responsive valve 6. The temperature responsive valve 6 incorporates a bimetal as a temperature sensitive member, and automatically opens when the fluid temperature in the steam discharge port 4 is lower than a predetermined value so that the jacket portion 11 and the ejector 14 communicate with each other. On the other hand, when the fluid temperature becomes higher than a predetermined value, the valve is automatically closed. An air vent valve 20 is attached to the upper right side of the jacket portion 11. The outlet side of the air vent valve 20 is connected to the ejector 14 through a pipeline 21.

反応釜１内の図示しない被加熱物を加熱する場合、蒸気供給管３から加熱用の蒸気をジャケット部１１に供給すると共に、循環ポンプ１５を駆動してエゼクタ１４で吸引力を発生させる。 When heating an object (not shown) in the reaction kettle 1, heating steam is supplied from the steam supply pipe 3 to the jacket portion 11, and the circulation pump 15 is driven to generate a suction force by the ejector 14.

ジャケット部１１に供給された蒸気は、反応釜１内の被過熱物を加熱すると共に、蒸気の凝縮した復水は蒸気トラップ１２を通ってエゼクタ１４に吸引されタンク５に至る。 The steam supplied to the jacket portion 11 heats the superheated material in the reaction kettle 1, and the condensed condensate of the steam is sucked into the ejector 14 through the steam trap 12 and reaches the tank 5.

蒸気供給管３から供給される蒸気の圧力が低い場合、あるいは、供給蒸気量が少ない場合は、蒸気供給管３と反対側のジャケット部１１内へは必要な蒸気を供給することができず、その部分の温度は低下した状態となるが、この温度低下に基づいて温度応動弁６が開弁することによって、蒸気供給管３から蒸気排出口４を経てエゼクタ１４へと至る蒸気の流れを作り出すことができ、ジャケット部１１内の全体を均一に蒸気加熱することができる。また、ジャケット部１１の上部に溜まった空気は、空気抜弁２０からエゼクタ１４へ吸引される。 When the pressure of the steam supplied from the steam supply pipe 3 is low, or when the amount of supplied steam is small, the necessary steam cannot be supplied into the jacket portion 11 on the opposite side of the steam supply pipe 3, Although the temperature of the portion is lowered, the temperature responsive valve 6 is opened based on this temperature drop, thereby creating a flow of steam from the steam supply pipe 3 to the ejector 14 via the steam discharge port 4. The entire inside of the jacket portion 11 can be uniformly heated by steam. Further, the air accumulated in the upper portion of the jacket portion 11 is sucked from the air vent valve 20 to the ejector 14.

本発明に係る減圧蒸気加熱装置の実施例を示す構成図。The block diagram which shows the Example of the pressure reduction steam heating apparatus which concerns on this invention.

符号の説明Explanation of symbols

１反応釜
２真空吸引手段
３蒸気供給管
４蒸気排出口
５タンク
６温度応動弁
８温度センサ
１１ジャケット部
１４エゼクタ
１５循環ポンプ
２０空気抜弁
DESCRIPTION OF SYMBOLS 1 Reaction kettle 2 Vacuum suction means 3 Steam supply pipe 4 Steam discharge port 5 Tank 6 Temperature response valve 8 Temperature sensor 11 Jacket part 14 Ejector 15 Circulation pump 20 Air vent valve

Claims

被熱交換物を収納する熱交換器と、当該熱交換器に加熱用の蒸気を供給する蒸気供給管と、熱交換器内の流体を吸引する真空吸引手段を接続したものにおいて、蒸気供給管から熱交換器へ供給される蒸気が、熱交換器内の行き渡らない箇所に、蒸気排出口と空気抜弁を取り付けて、当該蒸気排出口に熱交換器内の温度が所定値よりも低下すると開弁し、所定値よりも上昇すると閉弁する温度応動弁を取り付けて、熱交換器内の全体に蒸気が供給されるようにしたことを特徴とする減圧蒸気加熱装置。
A steam supply pipe in which a heat exchanger for storing a heat exchange object, a steam supply pipe for supplying steam for heating to the heat exchanger, and a vacuum suction means for sucking a fluid in the heat exchanger are connected. A steam exhaust port and an air vent valve are installed at a location where the steam supplied to the heat exchanger does not spread in the heat exchanger, and the steam exhaust port opens when the temperature in the heat exchanger falls below a predetermined value. A reduced-pressure steam heating apparatus characterized in that a steam valve is attached to a temperature responsive valve that closes when it rises above a predetermined value so that steam is supplied to the entire heat exchanger.