JP2002267102A - Electric evaporator - Google Patents
Electric evaporatorInfo
- Publication number
- JP2002267102A JP2002267102A JP2001063952A JP2001063952A JP2002267102A JP 2002267102 A JP2002267102 A JP 2002267102A JP 2001063952 A JP2001063952 A JP 2001063952A JP 2001063952 A JP2001063952 A JP 2001063952A JP 2002267102 A JP2002267102 A JP 2002267102A
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- electric
- double
- outer cylindrical
- tube
- 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.)
- Withdrawn
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- Resistance Heating (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、液体を電気的熱量
で蒸発もしくは過熱する電気式蒸発器に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric evaporator that evaporates or superheats a liquid with electric heat.
【０００２】[0002]
【従来の技術】周知の如く、電気式蒸発器としては、例
えば図４に示すのものが知られている。図中の符番１
は、液体の入口２及び蒸気の出口３を有した容器を示
す。この容器１内には、容器１内に送られた液体を加熱
して蒸気にするためのシースヒータ４が収納されてい
る。このシースヒータ４は、該シースヒータ４に電気的
に接続された電源５により加熱されるようになってい
る。2. Description of the Related Art As is well known, for example, an electric evaporator shown in FIG. 4 is known. Reference number 1 in the figure
Denotes a container having a liquid inlet 2 and a vapor outlet 3. The container 1 houses a sheath heater 4 for heating the liquid sent into the container 1 to vapor. The sheath heater 4 is heated by a power supply 5 electrically connected to the sheath heater 4.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、従来の
電気式蒸発器によれば、以下に述べる問題点を有してい
る。 （１）容器１内で液体に浸漬するシースヒータ４は液体
に対するヒータ表面積が限定されているため、ヒータ出
力を挙げると表面温度が高くなり、限界熱流束を超えて
バーンアウトし、ヒータの断線もしくは寿命低下を招
く。そのため、出力を増大すると、ヒータ本体を大型に
してそれに見合う表面積にしなければならない。また、
それに伴い蒸発器本体も大型化し、あわせて応答性が悪
くなる。However, the conventional electric evaporator has the following problems. (1) The sheath heater 4 immersed in the liquid in the container 1 has a limited heater surface area with respect to the liquid. Therefore, if the heater output is increased, the surface temperature increases, and the burnout exceeds the limit heat flux, and the heater breaks or This leads to a shortened life. Therefore, when the output is increased, the heater body must be made large to have a surface area commensurate with it. Also,
As a result, the evaporator main body also becomes large, and the responsiveness also worsens.
【０００４】（２）蒸発させる液体へのシースヒータ４
の表面加熱面積が小さいため、蒸発して、液体時より数
桁熱伝達率が低下した蒸気を更に過熱することが困難で
あり、過熱する場合は、容器内部を高圧にして沸点を目
標温度まで上げる方法をとる。そのため、装置自体の耐
久性を上げるため、容器壁厚みを上げるので、装置の大
型化、応答性の低下につながる。(2) Sheath heater 4 for liquid to be evaporated
Because of the small surface heating area, it is difficult to evaporate and further heat the vapor, whose heat transfer coefficient has decreased by several orders of magnitude from that of liquid, and in the case of overheating, raise the boiling point to the target temperature by increasing the pressure inside the container. Take the way to raise. Therefore, the thickness of the container wall is increased in order to increase the durability of the apparatus itself, which leads to an increase in the size of the apparatus and a decrease in responsiveness.
【０００５】（３）加熱すべき液体がメタノールなど分
解し易い物質では、シースヒータ表面の高温部に接する
ことで分解する。(3) If the liquid to be heated is easily decomposed, such as methanol, the liquid is decomposed by contacting a high temperature portion on the surface of the sheath heater.
【０００６】本発明はこうした事情を考慮してなされた
ので、両端が閉じられた外円筒管及びこの外円筒管の内
側に該外円筒管と同心円状に配置された両端が閉じられ
た内円筒管とから構成される二重管と、この二重管の外
側に配置された電気式加熱手段とを具備し、前記外円筒
管の両端には内円筒管と外円筒管の隙間に液体を流入
し、蒸気を流出させるための入口及び出口を有し、電気
式加熱手段により前記隙間に供給した液体を蒸発又は過
熱させる構成とすることにより、装置の大型化を招くこ
となく、蒸気応答性を上げることが可能な電気式蒸発器
を提供することを目的とする。The present invention has been made in view of such circumstances, and therefore, an outer cylindrical tube having both ends closed and an inner cylinder having both ends closed concentrically with the outer cylindrical tube inside the outer cylindrical tube. A double pipe composed of a pipe and electric heating means arranged outside the double pipe, and a liquid is supplied to a gap between the inner cylindrical pipe and the outer cylindrical pipe at both ends of the outer cylindrical pipe. It has an inlet and an outlet for inflow and outflow of steam, and has a structure in which the liquid supplied to the gap is evaporated or overheated by an electric heating means. It is an object of the present invention to provide an electric evaporator capable of increasing the temperature.
【０００７】[0007]
【課題を解決するための手段】本発明は、両端が閉じら
れた外円筒管及びこの外円筒管の内側に該外円筒管と同
心円状に配置された両端が閉じられた内円筒管とから構
成される二重管と、この二重管の外側に配置された電気
式加熱手段とを具備し、前記外円筒管の両端には内円筒
管と外円筒管の隙間に液体を流入し、蒸気を流出させる
ための入口及び出口を有し、前記電気式加熱手段により
前記隙間に供給した液体を蒸発又は過熱させる構成とな
っていることを特徴とする電気式蒸発器である。SUMMARY OF THE INVENTION The present invention relates to an outer cylindrical tube having both ends closed and an inner cylindrical tube having both ends closed concentrically with the outer cylindrical tube inside the outer cylindrical tube. A double pipe configured, comprising an electric heating means disposed outside the double pipe, liquid flows into the gap between the inner cylindrical pipe and the outer cylindrical pipe at both ends of the outer cylindrical pipe, An electric evaporator having an inlet and an outlet for allowing vapor to flow out, and configured to evaporate or overheat the liquid supplied to the gap by the electric heating means.
【０００８】[0008]
【発明の実施の形態】以下、本発明について更に詳細に
説明する。本発明において、前記二重管の内円筒管は、
外円筒管の片側にのみ支持されていることが好ましい。
この理由は、内円筒管が両端で外円筒管に支持されてい
る場合、電気式加熱手段により二重管が加熱されること
により、二重管を構成する外円筒管と内円筒管間に熱膨
張差が生じ、支持部で内円筒管又は外円筒管が破壊され
る恐れがあるからである。また、内円筒管が外円筒管に
全く支持されていない状態では、内円筒管と外円筒管間
の流路断面積が不均一となり、安定かつ効率のよい蒸気
を得ることが難しいので、好ましくない。BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in more detail. In the present invention, the inner cylindrical tube of the double tube,
Preferably, it is supported on only one side of the outer cylindrical tube.
The reason is that when the inner cylindrical tube is supported by the outer cylindrical tube at both ends, the double tube is heated by the electric heating means, so that the inner cylindrical tube is formed between the outer cylindrical tube and the inner cylindrical tube. This is because a difference in thermal expansion occurs and the inner cylindrical tube or the outer cylindrical tube may be broken at the support portion. Further, in a state where the inner cylindrical pipe is not supported by the outer cylindrical pipe at all, the cross-sectional area of the flow passage between the inner cylindrical pipe and the outer cylindrical pipe becomes uneven, and it is difficult to obtain a stable and efficient steam. Absent.
【０００９】本発明において、前記二重管のうち内円筒
管の外側もしくは外円筒管の内側に、流路高さ相当の旋
回溝を設けることが好ましい。ここで、伝熱面積を増加
させる点から考えると、旋回溝は外円筒管の内側に設け
る方が内円筒管の外側に設けることよりも好ましい。一
方、加工技術の点から考えると、内円筒管の外側に設け
る方が外円筒管の内側に設けるよりも好ましい。また、
旋回溝の代わりに旋回フィン等を設けてもよい。更に、
前記内円筒管、外円筒管の材質としては、例えばステン
レス製が挙げられる。In the present invention, it is preferable to provide a swirl groove corresponding to the height of the flow path outside the inner cylindrical tube or inside the outer cylindrical tube in the double tube. Here, from the viewpoint of increasing the heat transfer area, it is preferable that the swirl groove be provided inside the outer cylindrical tube, rather than be provided outside the inner cylindrical tube. On the other hand, from the viewpoint of processing technology, it is preferable to provide it outside the inner cylindrical pipe than to provide it inside the outer cylindrical pipe. Also,
A turning fin or the like may be provided instead of the turning groove. Furthermore,
Examples of the material of the inner cylindrical tube and the outer cylindrical tube include stainless steel.
【００１０】この旋回溝をつけることにより、本二重管
蒸発器の設置方向に自由度が出る。もし、旋回溝がない
と、本蒸発器を水平に設置した時、流入した液体は体積
流量が小さいのと、重力により隙間の下部のみ流れて、
不均一蒸発し、更に液体が流れない加熱面は温度が上が
り、管の破損、ヒータ断線・寿命低下を招く。しかし、
旋回溝があれば、重力に支配されずに液体が溝に沿って
流れるので、加熱管全体に均一に流れ伝熱面が有効に使
用されて、局所加熱などの問題も生じないので、水平置
き、斜め置き、垂直置きと設置方法に自由度がでる。[0010] By providing the swirl groove, the degree of freedom in the installation direction of the double pipe evaporator is increased. If there is no swirl groove, when the evaporator is installed horizontally, the inflowing liquid will flow only in the lower part of the gap due to gravity because the volume flow rate is small,
The temperature of the heated surface where the liquid is not uniformly evaporated and the liquid does not flow further rises, causing damage to the pipe, disconnection of the heater and shortening of the service life. But,
If there is a swirl groove, the liquid flows along the groove without being governed by gravity, so it will flow evenly over the entire heating pipe and the heat transfer surface will be used effectively, and there will be no problems such as local heating. The degree of freedom can be set in the installation method, oblique installation, vertical installation.
【００１１】また、蒸発途中の気・液混合流体は、旋回
による遠心力で、質量の重い液体が、外円筒管壁面に衝
突して、効率よく残留液が蒸発する。これらの効果を発
揮するには、旋回溝若しくはフィンと対面する壁面との
隙間は極力小さくして、溝を越えて流れる液体を防止す
ることが必要となる。Further, in the gas-liquid mixed fluid in the course of evaporation, due to the centrifugal force caused by the swirling, the heavy liquid collides with the wall surface of the outer cylindrical tube, and the residual liquid evaporates efficiently. In order to exhibit these effects, it is necessary to minimize the gap between the turning groove or the fin and the wall surface facing the fin so as to prevent the liquid flowing over the groove.
【００１２】本発明において、前記旋回溝もしくは旋回
フィンによる流路断面積は、二重管の軸方向に沿う中央
部から入口側（前半部）では小さくかつ二重管の軸方向
に沿う中央部から出口側（後半部）では入口側に比べて
大きくすることが好ましい。これは、二重管の入口側付
近における液体の流速を速く流すためである。ここで、
二重管の入口側と出口側での流路断面積を変える方法と
しては、例えば二重管の中央部から入口側では１条ネ
ジ、二重管の中央部から出口側では５条ネジなど任意に
ネジ溝を形成することが考えられる。もしくは、溝のピ
ッチなどを変更して、流路断面積を変える方法もある。In the present invention, the cross-sectional area of the flow channel formed by the swirl grooves or swirl fins is small from the central portion along the axial direction of the double pipe to the inlet side (the first half) and the central portion along the axial direction of the double pipe. It is preferable to increase the size from the outlet side (the latter half) to the inlet side. This is to increase the flow velocity of the liquid near the inlet side of the double pipe. here,
As a method of changing the cross-sectional area of the flow path between the inlet side and the outlet side of the double pipe, for example, a single thread from the center of the double pipe to the inlet side, a 5-thread screw from the center of the double pipe to the outlet side, etc. It is conceivable to form a screw groove arbitrarily. Alternatively, there is a method of changing the groove pitch or the like to change the cross-sectional area of the flow path.
【００１３】本発明において、前記電気式加熱手段とし
ては、例えば前記二重管に巻きつけられた線状電気シー
スヒータが挙げられる。ここで、シースヒータと二重管
壁面の間には、熱伝導性の材料もしくは金属を充填する
ことが好ましい。これは、熱伝導性の材料の存在によ
り、シースヒータからの熱を熱伝導性の材料を介してシ
ースヒータ単独の場合と比べ、より二重管側に伝熱しや
すくなるからである。In the present invention, examples of the electric heating means include a linear electric sheath heater wound around the double pipe. Here, the space between the sheath heater and the double tube wall is preferably filled with a thermally conductive material or metal. This is because the presence of the heat conductive material makes it easier to transfer the heat from the sheath heater to the double tube side through the heat conductive material as compared with the case of the sheath heater alone.
【００１４】本発明において、前記シースヒータは、通
電用端子を設けるために二重管の両端部で該二重管から
離間している。この部分が発熱すると、二重管に接して
いないので、抜熱されず異常加熱を起こし、シースヒー
タの断線もしくは寿命低下を招く。そのためにシースヒ
ータの両端部は、二重管から離間する数巻前からヒータ
に非発熱部を設ける必要がある。[0014] In the present invention, the sheath heater is separated from the double tube at both ends of the double tube in order to provide an energizing terminal. When this portion generates heat, it does not come into contact with the double pipe, so that the heat is not removed and abnormal heating occurs, resulting in disconnection of the sheath heater or shortening of its life. For this purpose, it is necessary to provide the heater with a non-heat-generating portion at both ends of the sheath heater a few turns before being separated from the double pipe.
【００１５】本発明において、蒸気温度測定用の測定点
を前記二重管の蒸気出口付近に設け,二重管の温度が所
定温度以上になるとシースヒータへの通電を切り、所定
温度以下では通電することが好ましい。測定点には、例
えば熱電対を二重管の蒸気出口付近に設置することが挙
げられる。蒸気出口付近に設置するのは最終的な蒸気温
度を制御するためであり、二重管の途中では非加熱流体
が完全に蒸気化されないので飽和温度となり、最終的な
蒸気の過熱温度が判らない。また、熱電対の設置位置は
発生蒸気中より、出口近傍壁面の方ができればよい。理
由は、蒸気流では熱電対への伝熱性能が悪く、温度変化
の応答性が低下する可能性があるからである。また、ヒ
ータ保護のためにも、ヒータ温度に近い管壁温度を測定
することが保守の面でよい。In the present invention, a measurement point for measuring the steam temperature is provided near the steam outlet of the double pipe, and when the temperature of the double pipe becomes higher than a predetermined temperature, the power to the sheath heater is turned off, and when the temperature is lower than the predetermined temperature, the power is turned on. Is preferred. The measurement point includes, for example, installing a thermocouple near the steam outlet of the double tube. The reason for installing near the steam outlet is to control the final steam temperature, and since the unheated fluid is not completely vaporized in the middle of the double pipe, it becomes the saturation temperature, so the final superheat temperature of the steam is unknown . The thermocouple may be installed on the wall near the outlet rather than in the generated steam. The reason is that in the steam flow, the heat transfer performance to the thermocouple is poor, and the responsiveness to a temperature change may be reduced. In order to protect the heater, it is preferable to measure the tube wall temperature close to the heater temperature in terms of maintenance.
【００１６】本発明において、前記電気式加熱手段の外
側には断熱材を設置することが好ましい。これにより、
電気式加熱手段からの外部への熱の放散を抑えることが
できる。ここで、断熱材としては例えばニチアス社製の
商品名：ファインレックスが挙げられるが、シースヒー
タの温度に耐えうる材料であれば特に限定されない。In the present invention, it is preferable to provide a heat insulating material outside the electric heating means. This allows
Dissipation of heat from the electric heating means to the outside can be suppressed. Here, as the heat insulating material, for example, a trade name: Fine Rex manufactured by Nichias Co., Ltd. may be mentioned, but it is not particularly limited as long as the material can withstand the temperature of the sheath heater.
【００１７】[0017]
【実施例】以下、本発明の一実施例に係る電気式蒸発器
について図１〜図３を参照して説明する。ここで、図１
は本実施例に係る電気式蒸発器の全体図、図２は図１の
要部Ｘの拡大図、図３は図１の要部Ｙの拡大図を示す。
なお、下記実施例で述べる各部材の材質、数値等は一例
を示すもので、本発明の権利範囲を特定するものではな
い。DESCRIPTION OF THE PREFERRED EMBODIMENTS An electric evaporator according to one embodiment of the present invention will be described below with reference to FIGS. Here, FIG.
2 is an overall view of the electric evaporator according to the present embodiment, FIG. 2 is an enlarged view of a main part X of FIG. 1, and FIG. 3 is an enlarged view of a main part Y of FIG.
The materials, numerical values, and the like of each member described in the following examples are merely examples, and do not specify the scope of the present invention.
【００１８】図中の符番１１は、両端が閉じられた厚み
１ｍｍのＳＵＳ製外円筒管１２と、この外円筒管１２の
内側に該外円筒管１２と同心円状に配置された両端が閉
じられた厚み１ｍｍのＳＵＳ製内円筒管１３とから構成
される二重管を示す。前記内円筒管１３の一端は、外円
筒管１２に例えば溶接により固定されている。前記内円
筒管１３の外周面には、流路高さ相当の旋回溝１４が形
成されている。なお、図２において、符番３１は接続
部、Ｌ１は内円筒管１３の山部と外円筒管１２との間
隔、Ｌ２は内円筒管１３の旋回溝１４のピッチを示す。Reference numeral 11 in the drawing denotes an outer cylindrical tube 12 made of SUS having a thickness of 1 mm having both ends closed, and both ends disposed concentrically with the outer cylindrical tube 12 inside the outer cylindrical tube 12. 2 shows a SUS inner cylindrical tube 13 having a thickness of 1 mm. One end of the inner cylindrical tube 13 is fixed to the outer cylindrical tube 12 by, for example, welding. A swirl groove 14 corresponding to the height of the flow path is formed on the outer peripheral surface of the inner cylindrical tube 13. Incidentally, shown in FIG. 2, reference numeral 31 is the connecting portion, L 1 is the interval between the crest and the outer cylindrical tube 12 of the cylindrical tube 13, the pitch of the turning groove 14 of the L 2 inner cylindrical tube 13.
【００１９】前記二重管１１の一端側には液体を二重管
１１の隙間１５に導入するための入口１６が設けられ、
他端側には前記液体を加熱（又は過熱）して得られた蒸
気を排出するための出口１７が設けられている。二重管
１１による流路断面積は、二重管１１の入口１６に近い
前半部では小さく、出口１７に近い後半部では大きくな
るように設定されている。具体的には、二重管１１の軸
方向に沿う中央部から入口側（前半部）に位置する内円
筒管１３の外周面には１条ネジにより旋回溝１４が形成
され、出口側（後半部）に位置する内円筒管１３の外周
面には５条ネジにより旋回溝１４が形成されている。例
では、旋回溝１４のピッチは全体を通じて一定にしてあ
る。At one end of the double pipe 11, an inlet 16 for introducing a liquid into the gap 15 of the double pipe 11 is provided.
The other end is provided with an outlet 17 for discharging vapor obtained by heating (or overheating) the liquid. The flow path cross-sectional area of the double pipe 11 is set to be small in the first half near the inlet 16 and large in the second half near the outlet 17 of the double pipe 11. Specifically, a turning groove 14 is formed by a single thread on the outer peripheral surface of the inner cylindrical tube 13 located on the inlet side (front half) from the center along the axial direction of the double pipe 11, and the outlet side (second half). A swivel groove 14 is formed on the outer peripheral surface of the inner cylindrical tube 13 located at the position (5) by a five-thread screw. In the example, the pitch of the turning groove 14 is constant throughout.
【００２０】前記二重管１１の外周部には、電気式加熱
手段としての線状の電気シースヒータ１８が巻きつけら
れている。但し、この電気シースヒータ１８は、図１に
示すように、二重管１１の両端では該二重管１１より離
間されて非接触状態になった後、前記電気シースヒータ
１８の両端には電源１９が接続されて入る。このシース
ヒータ１８の非接触部とその手前数巻は非発熱部となっ
ており、ヒータの異常加熱による断線、寿命低下を防止
する。ここで、電気シースヒータ１８は、後述する熱電
対の温度測定値に応じてスイッチ２１がＯＮ、ＯＦＦす
るように構成されている。A linear electric sheath heater 18 as electric heating means is wound around the outer periphery of the double pipe 11. However, as shown in FIG. 1, the electric sheath heater 18 is separated from the double tube 11 at both ends thereof so as to be in a non-contact state, and then a power supply 19 is provided at both ends of the electric sheath heater 18. Connected and enter. The non-contact portion of the sheath heater 18 and several turns in front of the sheath heater 18 are non-heat generating portions, thereby preventing disconnection and shortening of service life due to abnormal heating of the heater. Here, the electric sheath heater 18 is configured such that the switch 21 is turned on and off in accordance with a temperature measurement value of a thermocouple described later.
【００２１】前記電気シースヒータ１８と二重管壁面の
間には、図３に示すように、熱伝導性促進剤としての熱
導電性材料（例えばＭｇＯセメント）２０がロウ付けさ
れている。これは、電気シースヒータ１８からの熱を二
重管１１へできるだけ多く伝えるためである。前記電気
シースヒータ１８の外側には、外部への放熱ロスを低減
するために断熱材２２が設置されている。なお、符番２
１はスイッチを示し、符番２３は二重管１１の一端部に
取り付けられた熱電対を示す。As shown in FIG. 3, a heat conductive material (for example, MgO cement) 20 as a heat conductivity promoter is brazed between the electric sheath heater 18 and the wall surface of the double pipe. This is for transmitting heat from the electric sheath heater 18 to the double tube 11 as much as possible. A heat insulating material 22 is provided outside the electric sheath heater 18 in order to reduce heat radiation loss to the outside. Note number 2
Reference numeral 1 denotes a switch, and reference numeral 23 denotes a thermocouple attached to one end of the double tube 11.
【００２２】こうした構成の電気式蒸発器において、液
体は二重管１１の入口１６から導入された後、液体は電
気シースヒータ１８により蒸発又は過熱され、二重管１
１の流路を通って出口１７から蒸気として取り出され
る。蒸気温度は、外円筒管１２の蒸気出口近傍に設置し
た熱電対２３で外壁面温度が所定温度を超えると、スイ
ッチ２１をＯＦＦにしてシースヒータ１８への通電を停
止し、所定温度を下回ると、スイッチ２１をＯＮにして
通電を開始することで制御されている。こうした電気式
蒸発器によれば、以下に述べる効果を有する。In the electric evaporator having such a configuration, after the liquid is introduced from the inlet 16 of the double tube 11, the liquid is evaporated or overheated by the electric sheath heater 18, and the double tube 1 is heated.
The gas is extracted from the outlet 17 as steam through one flow path. When the outer wall surface temperature exceeds a predetermined temperature by the thermocouple 23 installed near the steam outlet of the outer cylindrical tube 12, the steam temperature is turned off to stop the power supply to the sheath heater 18 when the temperature is lower than the predetermined temperature. It is controlled by turning on the switch 21 to start energization. According to such an electric evaporator, the following effects can be obtained.
【００２３】１）電気シースヒータ１８の出力が高い場
合でも、外円筒管内面の広い伝熱面積から液体に伝熱す
るので、バーンアウトしにくい。また、電気シースヒー
タ１８と外円筒管壁面は熱伝導性促進剤である熱伝導性
材料２０で充填されているので、電気シースヒータ１８
と外円筒管１２との温度差が低くなり、高い過熱温度を
設定しても電気シースヒータ１８が断線しにくく、寿命
を延ばすことができる。1) Even when the output of the electric sheath heater 18 is high, heat is transferred to the liquid from the large heat transfer area on the inner surface of the outer cylindrical tube, so that burnout is difficult. Further, since the electric sheath heater 18 and the outer cylindrical tube wall surface are filled with the heat conductive material 20 which is a heat conductive promoter, the electric sheath heater 18
The temperature difference between the outer sheath 12 and the outer cylindrical tube 12 is reduced, so that the electric sheath heater 18 is hardly disconnected even if a high superheat temperature is set, and the life can be extended.
【００２４】２）二重管１１を構成する外円筒管１２、
内円筒管１３には薄肉の管を使用するので、熱容量が低
く蒸発応答性が高い。 ３）内円筒管１３の外側の周面に２種類の旋回溝１４を
設けて隙間１５の流路断面積を調整する構成となってい
るので、液体は溝なし時と比べて流速が向上する。ま
た、旋回力により蒸発途中は液体が遠心力で加熱された
外円筒管内壁に付着するので、液体又は蒸気の熱伝導率
は向上する。従って、外円筒管１２しいては電気シース
ヒータ１８の温度を低くでき、ヒータ断線を防止してヒ
ータ寿命を向上できる。旋回溝１４は内円筒管１３の外
周面に設けるので、加工が容易である。2) an outer cylindrical tube 12 constituting the double tube 11,
Since a thin tube is used for the inner cylindrical tube 13, the heat capacity is low and the evaporation response is high. 3) Since two kinds of swirl grooves 14 are provided on the outer peripheral surface of the inner cylindrical tube 13 to adjust the flow path cross-sectional area of the gap 15, the liquid flow rate is improved as compared with the case where there is no groove. . In addition, since the liquid adheres to the inner wall of the outer cylindrical tube heated by the centrifugal force during the evaporation due to the swirling force, the thermal conductivity of the liquid or the vapor is improved. Therefore, the temperature of the electric sheath heater 18 in the outer cylindrical tube 12 can be lowered, and the heater life can be improved by preventing the heater disconnection. Since the turning groove 14 is provided on the outer peripheral surface of the inner cylindrical tube 13, processing is easy.
【００２５】４）上記３）の熱伝達率向上効果で外円筒
管内壁面温度が低くなるので、メタノール等例えば４０
０℃以上では分解して別物質になる液体の蒸発、過熱に
も適している。 ５）蒸気を過熱する場合にも、気化して液体時と比較し
て熱伝導率が低下しても、旋回溝１４で伝熱面積が大き
く出来、上記３）の如く熱伝達率を増大できるので、装
置が小型化できる。4) Since the inner wall surface temperature of the outer cylindrical tube is lowered by the heat transfer coefficient improving effect of the above 3), for example, 40
Above 0 ° C., it is also suitable for evaporating and overheating liquids that decompose into other substances. 5) Even when the steam is overheated, the heat transfer area can be increased in the swirl groove 14 and the heat transfer rate can be increased as described in 3) above, even if the heat conductivity is reduced as compared with the liquid state when vaporized. Therefore, the size of the device can be reduced.
【００２６】６）二重管１１の蒸気出口付近に熱電対２
３を設けて温度制御するので、最終温度に近い点で測温
できる。6) Thermocouple 2 near the steam outlet of double pipe 11
3, the temperature can be measured at a point close to the final temperature.
【００２７】なお、上記実施例では、内円筒管の一端を
外円筒管に溶接により固定する場合について述べたが、
これに限らず、ネジ等を用いて固定してもよい。In the above embodiment, the case where one end of the inner cylindrical tube is fixed to the outer cylindrical tube by welding has been described.
However, the present invention is not limited to this, and may be fixed using screws or the like.
【００２８】また、上記実施例では、内円筒管の外周面
に旋回溝を設けた場合について述べたが、これに限ら
ず、外円筒管の内周面に旋回溝を設けてもよいし、内円
筒管の外周面に旋回フィンを設けてもよい。Further, in the above embodiment, the case where the turning groove is provided on the outer peripheral surface of the inner cylindrical tube has been described. However, the present invention is not limited to this, and the turning groove may be provided on the inner peripheral surface of the outer cylindrical tube. A turning fin may be provided on the outer peripheral surface of the inner cylindrical tube.
【００２９】更に、上記実施例では、旋回溝を二重管の
前半部では１条ネジによりかつ二重管の後半部では５条
ネジにより形成する場合について述べたが、これに限ら
ない。更には、熱電対は二重管の蒸気出口付近に設けた
場合について述べたが、これに限らず、出口付近の他、
二重管の中央部や二重管の液体入口付近にも設けて液体
や蒸気の温度制御を行ってもよい。Further, in the above embodiment, the case where the turning groove is formed by a single thread in the front half of the double pipe and by a five thread in the rear half of the double pipe has been described, but the present invention is not limited to this. Furthermore, the case where the thermocouple is provided near the steam outlet of the double pipe has been described, but the thermocouple is not limited to this, and in addition to the vicinity of the outlet,
The temperature control of the liquid or the vapor may be performed by providing it at the center of the double pipe or near the liquid inlet of the double pipe.
【００３０】[0030]
【発明の効果】以上詳述したように本発明によれば、両
端が閉じられた外円筒管及びこの外円筒管の内側に該外
円筒管と同心円状に配置された両端が閉じられた内円筒
管とから構成される二重管と、この二重管の外側に配置
された電気式加熱手段とを具備し、前記外円筒管の両端
には内円筒管と外円筒管の隙間に液体を流入し、蒸気を
流出させるための入口及び出口を有し、電気式加熱手段
により前記隙間に供給した液体を蒸発又は過熱させる構
成とすることにより、装置の大型化を招くことなく、蒸
気応答性を上げることが可能な電気式蒸発器を提供でき
る。As described above in detail, according to the present invention, an outer cylindrical tube having both ends closed, and an inner cylindrical tube having both ends closed concentrically with the outer cylindrical tube inside the outer cylindrical tube. A double pipe composed of a cylindrical pipe, and electric heating means disposed outside the double pipe, and a liquid is inserted into a gap between the inner cylindrical pipe and the outer cylindrical pipe at both ends of the outer cylindrical pipe. Having an inlet and an outlet for inflowing and outflowing steam, and having a configuration in which the liquid supplied to the gap is evaporated or overheated by an electric heating means, so that the steam response can be achieved without increasing the size of the apparatus. An electric evaporator capable of improving the performance can be provided.
【図１】本発明の実施例１に係る電気式蒸発器の全体
図。FIG. 1 is an overall view of an electric evaporator according to a first embodiment of the present invention.
【図２】図１の要部Ｘの拡大図。FIG. 2 is an enlarged view of a main part X of FIG.
【図３】図１の要部Ｙの拡大図。FIG. 3 is an enlarged view of a main part Y of FIG. 1;
【図４】従来の電気式蒸発器の説明図。FIG. 4 is an explanatory view of a conventional electric evaporator.
１１…二重管、 １２…ＳＵＳ製外円筒管、 １３…ＳＵＳ製内円筒管、 １４…旋回溝、 １５…隙間、 １６…入口、 １７…出口、 １８…電気シースヒータ（電気加熱手段）、 １９…電源、 ２０…熱伝導材、 ２１…スイッチ、 ２２…断熱材、 ２３…熱電対。 11: Double tube, 12: SUS outer cylindrical tube, 13: SUS inner cylindrical tube, 14: Revolving groove, 15: Gap, 16: Inlet, 17: Exit, 18: Electric sheath heater (electric heating means), 19 ... power supply, 20 ... thermal conductive material, 21 ... switch, 22 ... heat insulating material, 23 ... thermocouple.
Claims (8)
筒管の内側に該外円筒管と同心円状に配置された両端が
閉じられた内円筒管とから構成される二重管と、この二
重管の外側に配置された電気式加熱手段とを具備し、前
記外円筒管の両端には内円筒管と外円筒管の隙間に液体
を流入し、蒸気を流出させるための入口及び出口を有
し、前記電気式加熱手段により前記隙間に供給した液体
を蒸発又は過熱させる構成となっていることを特徴とす
る電気式蒸発器。1. A double pipe comprising an outer cylindrical pipe having both ends closed, and an inner cylindrical pipe having both ends closed inside the outer cylindrical pipe and arranged concentrically with the outer cylindrical pipe; An electric heating means arranged outside the double pipe, an inlet for flowing liquid into a gap between the inner cylindrical pipe and the outer cylindrical pipe at both ends of the outer cylindrical pipe, and discharging steam. An electric evaporator having an outlet, wherein the liquid supplied to the gap is evaporated or overheated by the electric heating means.
側にのみ支持されていることを特徴とする請求項１記載
の電気式蒸発器。2. The electric evaporator according to claim 1, wherein the inner cylindrical tube of the double tube is supported only on one side of the outer cylindrical tube.
は外円筒管の内側に、流路高さ相当の旋回溝もしくは旋
回フィンが設けられていることを特徴とする請求項１記
載の電気式蒸発器。3. The swirl groove or swirl fin corresponding to the flow path height is provided outside the inner cylindrical tube or inside the outer cylindrical tube of the double tube. Electric evaporator.
路断面積は、二重管の軸方向に沿う中央部から入口側で
は小さくかつ出口側では入口側に比べて大きいことを特
徴とする請求項３記載の電気式蒸発器。4. The cross-sectional area of the flow path formed by the swirling groove or the swirling fin is smaller from the central portion along the axial direction of the double pipe at the inlet side and larger at the outlet side as compared with the inlet side. 3. The electric evaporator according to 3.
つけられた線状電気シースヒータであり、該シースヒー
タと二重管壁面の間に熱伝導性の材料もしくは金属を充
填したことを特徴とする請求項１記載の電気式蒸発器。5. The electric heating means is a linear electric sheath heater wound around the double tube, and a space between the sheath heater and the double tube wall is filled with a thermally conductive material or metal. The electric evaporator according to claim 1, wherein
する両端部及び離間前の数巻は通電しても発熱しない非
発熱部をもつことを特徴とする請求項５記載の電気式蒸
発器。6. The electric evaporator according to claim 5, wherein both ends of the sheath heater separated from the double tube and several turns before separation have non-heat generating portions that do not generate heat even when energized.
蒸気出口付近に設け,二重管の温度が所定温度以上にな
るとシースヒータへの通電を切り、所定温度以下では通
電することを特徴とする請求項１記載の電気式蒸発器。7. A measurement point for measuring a steam temperature is provided near the steam outlet of the double pipe, and when the temperature of the double pipe becomes higher than a predetermined temperature, the power to the sheath heater is cut off, and when the temperature of the double pipe is lower than the predetermined temperature, the power is turned off. The electric evaporator according to claim 1, characterized in that:
置されていることを特徴とする請求項１記載の電気式蒸
発器。8. The electric evaporator according to claim 1, wherein a heat insulating material is provided outside said electric heating means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001063952A JP2002267102A (en) | 2001-03-07 | 2001-03-07 | Electric evaporator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001063952A JP2002267102A (en) | 2001-03-07 | 2001-03-07 | Electric evaporator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2002267102A true JP2002267102A (en) | 2002-09-18 |
Family
ID=18922853
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001063952A Withdrawn JP2002267102A (en) | 2001-03-07 | 2001-03-07 | Electric evaporator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2002267102A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1298403C (en) * | 2004-12-04 | 2007-02-07 | 曲景春 | Electric heating type energy-saving evaporator |
| JP2010060244A (en) * | 2008-09-05 | 2010-03-18 | Tokyo Electron Ltd | Steam generator, steam generating method and substrate processing device |
| CN1818461B (en) * | 2006-03-16 | 2010-04-21 | 沙静明 | Machining method of electric heating instant steaming generator |
| JP2013100971A (en) * | 2011-11-10 | 2013-05-23 | Miura Co Ltd | Steam generation system |
| JP2015510574A (en) * | 2012-01-19 | 2015-04-09 | シーメンス アクチエンゲゼルシヤフトＳｉｅｍｅｎｓ Ａｋｔｉｅｎｇｅｓｅｌｌｓｃｈａｆｔ | Auxiliary steam generator system for power plant |
| JP2020085663A (en) * | 2018-11-26 | 2020-06-04 | 株式会社田中電気研究所 | Light scattering type dust concentration meter for white turbid exhaust gas |
| KR20200098852A (en) * | 2019-02-13 | 2020-08-21 | (주)영사이언스 | Apparatus for vaporizing a liquid source |
| JP2021032597A (en) * | 2019-08-19 | 2021-03-01 | 横河電機株式会社 | Gas analyzer |
-
2001
- 2001-03-07 JP JP2001063952A patent/JP2002267102A/en not_active Withdrawn
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1298403C (en) * | 2004-12-04 | 2007-02-07 | 曲景春 | Electric heating type energy-saving evaporator |
| CN1818461B (en) * | 2006-03-16 | 2010-04-21 | 沙静明 | Machining method of electric heating instant steaming generator |
| JP2010060244A (en) * | 2008-09-05 | 2010-03-18 | Tokyo Electron Ltd | Steam generator, steam generating method and substrate processing device |
| US8281498B2 (en) | 2008-09-05 | 2012-10-09 | Tokyo Electron Limited | Evaporator, evaporation method and substrate processing apparatus |
| KR101391383B1 (en) * | 2008-09-05 | 2014-05-07 | 도쿄엘렉트론가부시키가이샤 | Evaporator, evaporation method and substrate processing apparatus |
| JP2013100971A (en) * | 2011-11-10 | 2013-05-23 | Miura Co Ltd | Steam generation system |
| JP2015510574A (en) * | 2012-01-19 | 2015-04-09 | シーメンス アクチエンゲゼルシヤフトＳｉｅｍｅｎｓ Ａｋｔｉｅｎｇｅｓｅｌｌｓｃｈａｆｔ | Auxiliary steam generator system for power plant |
| US9494054B2 (en) | 2012-01-19 | 2016-11-15 | Siemens Aktiengesellschaft | Auxiliary steam generator system for a power plant |
| JP2020085663A (en) * | 2018-11-26 | 2020-06-04 | 株式会社田中電気研究所 | Light scattering type dust concentration meter for white turbid exhaust gas |
| KR20200098852A (en) * | 2019-02-13 | 2020-08-21 | (주)영사이언스 | Apparatus for vaporizing a liquid source |
| KR102226695B1 (en) * | 2019-02-13 | 2021-03-11 | (주)영사이언스 | Apparatus for vaporizing a liquid source |
| JP2021032597A (en) * | 2019-08-19 | 2021-03-01 | 横河電機株式会社 | Gas analyzer |
| JP7099416B2 (en) | 2019-08-19 | 2022-07-12 | 横河電機株式会社 | Gas analyzer |
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Legal Events
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Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20080513 |