JP7065509B2 - Superheated steam generator and conductor tube - Google Patents

Superheated steam generator and conductor tube Download PDF

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JP7065509B2
JP7065509B2 JP2018079015A JP2018079015A JP7065509B2 JP 7065509 B2 JP7065509 B2 JP 7065509B2 JP 2018079015 A JP2018079015 A JP 2018079015A JP 2018079015 A JP2018079015 A JP 2018079015A JP 7065509 B2 JP7065509 B2 JP 7065509B2
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superheated steam
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深 水嶋
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Tokuden Co Ltd Kyoto
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Description

本発明は、螺旋状に巻回した導体管を誘導加熱又は通電加熱することによって、導体管内を流れる水蒸気を加熱して過熱水蒸気を生成する過熱水蒸気生成装置に関するものである。 The present invention relates to a superheated steam generator that heats steam flowing in a conductor tube to generate superheated steam by inducing heating or energizing a conductor tube wound in a spiral shape.

この種の過熱水蒸気生成装置において、特許文献１に示すように、二次コイルを形成する螺旋状に巻回した導体管の複数重を、螺旋の軸方向に延びる電気接続部材で溶接等により電気接続し、短絡回路を構成して電気的リアクタンスを低減させて加熱効率を向上させたものが知られている。 In this type of superheated water vapor generator, as shown in Patent Document 1, a plurality of layers of spirally wound conductor tubes forming a secondary coil are electrically connected by welding or the like with an electrical connection member extending in the axial direction of the spiral. It is known that a short circuit is formed by connecting to reduce the electrical reactance and improve the heating efficiency.

この過熱水蒸気生成装置は、例えば１２０℃の水蒸気を螺旋導体管に導入して加熱し、例えば７００～１２００℃の過熱水蒸気を生成するものである。 In this superheated steam generator, for example, steam of 120 ° C. is introduced into a spiral conductor tube and heated to generate superheated steam of, for example, 700 to 1200 ° C.

特開２０１０－７１６２４号公報Japanese Unexamined Patent Publication No. 2010-71624

上述したように過熱水蒸気生成装置の導体管は、例えば１２０℃の水蒸気が導入されて、例えば７００～１２００℃の過熱水蒸気を導出することから、導体管の材質としては、例えば７００℃以上の耐熱温度を有する材質（例えばインコネル）を用いる必要がある。ところが、導体管の材質としてインコネルを用いた場合には、材料コストが高くなってしまう。 As described above, in the conductor tube of the superheated steam generator, for example, steam of 120 ° C. is introduced to derive superheated steam of, for example, 700 to 1200 ° C. Therefore, as the material of the conductor tube, for example, heat resistance of 700 ° C. or higher is obtained. It is necessary to use a material having a temperature (for example, Inconel). However, when Inconel is used as the material of the conductor tube, the material cost becomes high.

そこで本発明は、上記問題点を解決するためになされたものであり、導体管の材料コストを削減することをその主たる課題としたものである。 Therefore, the present invention has been made to solve the above-mentioned problems, and its main task is to reduce the material cost of the conductor tube.

すなわち、本発明に係る過熱水蒸気生成装置は、螺旋状に巻回した導体管を誘導加熱又は通電加熱することによって前記導体管内を流れる水蒸気を加熱して過熱水蒸気を生成する過熱水蒸気生成装置であって、前記導体管は、上流側部分と下流側部分とで異なる金属により形成されていることを特徴とする。 That is, the superheated steam generator according to the present invention is a superheated steam generator that heats steam flowing in the conductor tube by induction heating or energization heating of a spirally wound conductor tube to generate superheated steam. The conductor tube is characterized in that the upstream portion and the downstream portion are made of different metals.

また、本発明に係る導体管は、誘導加熱又は通電加熱されることにより内部を流れる水蒸気を加熱して過熱水蒸気を生成する導体管であって、螺旋状に巻回されており、上流側部分と下流側部分とで異なる金属により形成されていることを特徴とする。 Further, the conductor tube according to the present invention is a conductor tube that heats steam flowing inside by induction heating or energization heating to generate superheated steam, which is wound in a spiral shape and has an upstream portion. It is characterized in that it is formed of different metals in the downstream portion and the downstream portion.

このようなものであれば、導体管の上流側部分と下流側部分とを異なる金属により形成しているので、導体管の上流側部分の温度及び下流側部分の温度に合わせた材料選択を行うことができ、導体管の合理的な設計が可能となり、導体管の材料コストを低減することができる。 In such a case, since the upstream part and the downstream part of the conductor tube are made of different metals, the material is selected according to the temperature of the upstream part and the downstream part of the conductor tube. Therefore, the rational design of the conductor tube becomes possible, and the material cost of the conductor tube can be reduced.

具体的には、前記上流側部分を形成する金属の耐熱温度は、前記下流側部分を形成する金属の耐熱温度よりも低いことが望ましい。 Specifically, it is desirable that the heat-resistant temperature of the metal forming the upstream portion is lower than the heat-resistant temperature of the metal forming the downstream portion.

導体管の構成を簡略化するとともに、その製造コストを削減するためには、前記上流側部分と前記下流側部分とは溶接により接続されていることが望ましい。 In order to simplify the configuration of the conductor tube and reduce the manufacturing cost thereof, it is desirable that the upstream side portion and the downstream side portion are connected by welding.

前記導体管は、前記水蒸気を７００℃以上に加熱するものである場合に、本発明の効果が一層顕著となる。 The effect of the present invention becomes more remarkable when the conductor tube heats the steam to 700 ° C. or higher.

具体的には、前記上流側部分は、汎用合金鋼であるステンレス鋼（例えばＳＵＳ３０４、ＳＵＳ３１６等）から形成されており、前記下流側部分は、超耐熱鋼であるインコネルから形成されていることが望ましい。 Specifically, the upstream side portion is formed of stainless steel (for example, SUS304, SUS316, etc.) which is a general-purpose alloy steel, and the downstream side portion is formed of Inconel which is a super heat-resistant steel. desirable.

このように構成した本発明によれば、導体管の上流側部分と下流側部分とを異なる金属により形成しているので、導体管の上流側部分の温度及び下流側部分の温度に合わせた材料選択を行うことができ、導体管の合理的な設計が可能となり、導体管の材料コストを低減することができる。 According to the present invention configured as described above, since the upstream portion and the downstream portion of the conductor tube are made of different metals, a material that matches the temperature of the upstream portion and the downstream portion of the conductor tube. The selection can be made, the rational design of the conductor tube becomes possible, and the material cost of the conductor tube can be reduced.

本実施形態に係る過熱水蒸気生成装置の構成を模式的に示す断面図である。It is sectional drawing which shows typically the structure of the superheated steam generator which concerns on this embodiment. 同実施形態の過熱水蒸気生成装置の径方向における配置を模式的に示す図である。It is a figure which shows typically the arrangement in the radial direction of the superheated steam generator of the same embodiment. 同実施形態の導体管の構成を模式的に示す断面図である。It is sectional drawing which shows typically the structure of the conductor tube of the same embodiment. 同実施形態の導体管の構成を模式的に示す正面図である。It is a front view schematically showing the structure of the conductor tube of the same embodiment. 同実施形態の導体管における短絡電流の回路を示す図である。It is a figure which shows the circuit of the short circuit current in the conductor tube of the same embodiment. 同実施形態の内側鉄心の構成を模式的に示す平面図及び正面図である。It is a plan view and a front view schematically showing the structure of the inner iron core of the same embodiment. 同実施形態の外側鉄心の構成を模式的に示す平面図及び正面図である。It is a plan view and a front view schematically showing the structure of the outer iron core of the same embodiment. 同実施形態の継鉄心の構成を模式的に示す平面図である。It is a top view which shows typically the structure of the joint iron core of the same embodiment. 同実施形態の導体管の上流側部分及び下流側部分を模式的に示す図である。It is a figure which shows typically the upstream side part and the downstream side part of the conductor tube of the same embodiment. 変形実施形態の過熱水蒸気生成装置の径方向における配置を模式的に示す図である。It is a figure which shows typically the arrangement in the radial direction of the superheated steam generator of a modification embodiment.

＜１．装置構成＞
本実施形態に係る過熱水蒸気生成装置１００は、外部で生成された例えば１２０℃の水蒸気を加熱して、例えば７００～１２００℃の過熱水蒸気を生成するものである。その他、過熱水蒸気生成装置１００としては、水を加熱して例えば１２０℃の水蒸気を生成する飽和水蒸気生成部を有するものであっても良い。 <1. Device configuration>
The superheated steam generator 100 according to the present embodiment heats steam generated outside, for example, at 120 ° C. to generate superheated steam at, for example, 700 to 1200 ° C. In addition, the superheated steam generator 100 may have a saturated steam generator that heats water to generate steam at, for example, 120 ° C.

具体的に過熱水蒸気生成装置１００は、導体管２を誘導加熱することによって導体管２内を流れる水蒸気を加熱して過熱水蒸気を生成するものであり、図１及び図２に示すように、螺旋状に巻回した導体管２と、導体管２の内側に設けられた内側鉄心３と、導体管２の外側に設けられるとともに、内側鉄心３とともに閉磁路を形成する磁路形成部４と、内側鉄心３及び磁路形成部４の間に設けられ、内側鉄心３の内部に磁束を発生させる誘導コイル５と、内側鉄心３及び磁路形成部４の間に設けられ、水蒸気が流れる予熱管６と備えている。 Specifically, the superheated water vapor generator 100 generates superheated water vapor by inducing and heating the conductor tube 2 to heat the water vapor flowing in the conductor tube 2, and as shown in FIGS. 1 and 2, the spiral. A conductor tube 2 wound in a shape, an inner core 3 provided inside the conductor tube 2, a magnetic path forming portion 4 provided outside the conductor tube 2 and forming a closed magnetic path together with the inner core 3. An induction coil 5 provided between the inner core 3 and the magnetic path forming portion 4 to generate a magnetic flux inside the inner core 3, and a preheating tube provided between the inner core 3 and the magnetic path forming portion 4 through which water vapor flows. It is prepared with 6.

導体管２は、所定の中心軸線上に沿って螺旋状（コイル状）に巻回されたものである。具体的に導体管２は、図３及び図４に示すように、螺旋状に巻回した内側管要素２１と、当該内側管要素２１の外側に設けられ、螺旋状に巻回した外側管要素２２と、内側管要素２１及び外側管要素２２を流体的に接続するとともにそれらを短絡接続する接続管要素２３ａ、２３ｂとを備えている。なお、導体管２の材質としては、汎用合金鋼であるステンレス鋼（ＳＵＳ３０４やＳＵＳ３１６等）や超耐熱鋼であるインコネル等である。 The conductor tube 2 is wound in a spiral shape (coil shape) along a predetermined central axis. Specifically, as shown in FIGS. 3 and 4, the conductor tube 2 is provided with a spirally wound inner tube element 21 and an outer tube element provided outside the inner tube element 21 and spirally wound. 22 is provided with connecting pipe elements 23a and 23b for fluidly connecting the inner pipe element 21 and the outer pipe element 22 and short-connecting them. The material of the conductor tube 2 is stainless steel (SUS304, SUS316, etc.) which is a general-purpose alloy steel, Inconel which is a super heat-resistant steel, and the like.

内側管要素２１及び外側管要素２２の巻回方向は互いに逆向きとしてある（図３参照）。そして、内側管要素２１の軸方向一端部と外側管要素２２の軸方向一端部とが接続管要素２３ａにより接続されている。また、内側管要素２１の軸方向他端部と外側管要素２２の軸方向他端部とが接続管要素２３ｂにより接続されている。 The winding directions of the inner tube element 21 and the outer tube element 22 are opposite to each other (see FIG. 3). Then, one end in the axial direction of the inner tube element 21 and one end in the axial direction of the outer tube element 22 are connected by a connecting tube element 23a. Further, the other end in the axial direction of the inner tube element 21 and the other end in the axial direction of the outer tube element 22 are connected by the connecting tube element 23b.

接続管要素２３ａには水蒸気の導入ポート２ｐ１が設けられており、接続管要素２３ｂには過熱水蒸気の導出ポート２ｐ２が設けられている。この構成により、接続管要素２３ａの導入ポート２ｐ１から流入した水蒸気は、接続管要素２３ａにより内側管要素２１及び外側管要素２２に分岐して流れ、内側管要素２１及び外側管要素２２を流れた水蒸気（過熱水蒸気）は、接続管要素２３ｂで合流して導出ポート２ｐ２から流出する。 The connecting pipe element 23a is provided with a steam introduction port 2p1, and the connecting pipe element 23b is provided with a superheated steam outlet port 2p2. With this configuration, the water vapor flowing in from the introduction port 2p1 of the connecting pipe element 23a branches into the inner pipe element 21 and the outer pipe element 22 by the connecting pipe element 23a, and flows through the inner pipe element 21 and the outer pipe element 22. The steam (superheated steam) merges at the connecting pipe element 23b and flows out from the outlet port 2p2.

また、このように接続した導体管２は、内側管要素２１及び外側管要素２２が接続管要素２３により電気的に並列接続される構成である。そして、誘導コイル５により生じる磁束によって、内側管要素２１及び外側管要素２２に図５に示すように短絡電流が流れる。つまり、内側管要素２１には、軸方向一端部２１ａから軸方向他端部２１ｂに向かって短絡電流が流れ、外側管要素２２には、軸方向他端部２２ｂから軸方向一端部２２ａに向かって短絡電流が流れる。この構成により、導体管２とは別に電気接続部材を設ける必要が無く、導体管２自体の構成により短絡回路を形成することができる。 Further, the conductor tube 2 connected in this way has a configuration in which the inner tube element 21 and the outer tube element 22 are electrically connected in parallel by the connecting tube element 23. Then, due to the magnetic flux generated by the induction coil 5, a short-circuit current flows through the inner tube element 21 and the outer tube element 22 as shown in FIG. That is, a short-circuit current flows through the inner tube element 21 from the axial end portion 21a toward the axial end portion 21b, and through the outer tube element 22 from the axial end portion 22b toward the axial end portion 22a. Short-circuit current flows. With this configuration, it is not necessary to provide an electrical connection member separately from the conductor tube 2, and a short-circuit circuit can be formed by the configuration of the conductor tube 2 itself.

内側鉄心３は、図１及び図２に示すように、導体管２の内側において導体管２の内側管要素２１と同軸上に配置されている。本実施形態の内側鉄心３は、図６（Ａ）に示すように、いわゆるインボリュート鉄心であり、幅方向断面がインボリュート曲線状に湾曲した湾曲部を有する複数の珪素鋼板を円周方向に放射状に積み重ねて円筒状に形成したものである。なお、内側鉄心３は、図６（Ｂ）に示すように、平板状の珪素鋼板を積み重ねて円筒状に形成したものであっても良い。 As shown in FIGS. 1 and 2, the inner core 3 is arranged coaxially with the inner tube element 21 of the conductor tube 2 inside the conductor tube 2. As shown in FIG. 6A, the inner core 3 of the present embodiment is a so-called involute core, and a plurality of silicon steel plates having a curved portion whose cross section in the width direction is curved in an involute curve are radially radially in the circumferential direction. It is stacked and formed into a cylindrical shape. As shown in FIG. 6B, the inner iron core 3 may be formed by stacking flat plate-shaped silicon steel plates to form a cylindrical shape.

磁路形成部４は、図１に示すように、内側鉄心３とともに閉磁路を形成するものであり、導体管２の外側において周方向に例えば等間隔に配置された複数の外側鉄心４１と、内側鉄心３及び複数の外側鉄心４１の上端同士及び下端同士を接続する上下の継鉄心４２とを有する。なお、外側鉄心４１は、周方向に等間隔でなくても良い。 As shown in FIG. 1, the magnetic path forming portion 4 forms a closed magnetic path together with the inner core 3, and includes a plurality of outer cores 41 arranged at equal intervals in the circumferential direction on the outside of the conductor tube 2. It has an upper and lower joint core 42 for connecting the upper ends and the lower ends of the inner core 3 and the plurality of outer cores 41. The outer iron cores 41 do not have to be evenly spaced in the circumferential direction.

外側鉄心４１は、図２に示すように、導体管２の外側において導体管２と同軸上に配置されている。本実施形態では、３つの外側鉄心４１が、導体管２の外側において周方向に等間隔に配置されている。本実施形態の各外側鉄心４１は、後述する継鉄心４２との関係で、並列配置された２つの外側鉄心要素４１１、４１２から構成されている。また、各外側鉄心要素４１１、４１２は、図７に示すように、平板状の珪素鋼板を積み重ねて半円柱状又は半円筒状に形成したものである。これにより、過熱水蒸気生成装置１００を径方向に小型化している。なお、外側鉄心４１は、１つの外側鉄心要素からなるものであっても良い。 As shown in FIG. 2, the outer iron core 41 is arranged coaxially with the conductor tube 2 on the outside of the conductor tube 2. In the present embodiment, the three outer cores 41 are arranged at equal intervals in the circumferential direction on the outside of the conductor tube 2. Each outer core 41 of the present embodiment is composed of two outer core elements 411 and 412 arranged in parallel in relation to the joint core 42 described later. Further, as shown in FIG. 7, each outer core element 411 and 412 is formed by stacking flat plate-shaped silicon steel plates to form a semi-cylindrical or semi-cylindrical shape. As a result, the superheated steam generator 100 is miniaturized in the radial direction. The outer core 41 may be composed of one outer core element.

上下の継鉄心４２はそれぞれ、図８に示すように、３つの継鉄心要素４２１、４２２、４２３から構成されており、各継鉄心要素４２１、４２２、４２３は環状巻鉄心を変形させることにより構成されている。具体的に各継鉄心要素４２１、４２２、４２３は、環状巻鉄心を中央で屈曲するくの字状に変形させることにより構成されている。これら３つの継鉄心要素４２１、４２２、４２３を、それらの屈曲部が中心側に位置するように組み合わせることによりＹ字状の継鉄心４２が構成される。各継鉄心要素４２１、４２２、４２３の両端部には、前記各外側鉄心要素４１１、４１２が接続される。また、継鉄心４２の中央部には、内側鉄心３が接続される。つまり、３つの外側鉄心４１は正三角形の頂点に位置し、内側鉄心３は正三角形の重心に位置する。これら各部は、内側鉄心３、外側鉄心４１及び継鉄心４２を挟む挟持部材７を介して、締結ボルト等の締結機構８により軸方向から締結して行われる。 As shown in FIG. 8, the upper and lower joint cores 42 are each composed of three joint core elements 421, 422, and 423, and each joint core element 421, 422, and 423 are configured by deforming the annular wound core. Has been done. Specifically, each joint core element 421, 422, 423 is configured by deforming the annular wound core into a dogleg shape that bends at the center. A Y-shaped joint core 42 is formed by combining these three joint core elements 421, 422, and 423 so that their bent portions are located on the center side. The outer core elements 411 and 412 are connected to both ends of the joint core elements 421, 422, and 423. Further, the inner core 3 is connected to the central portion of the joint core 42. That is, the three outer cores 41 are located at the vertices of the equilateral triangle, and the inner core 3 is located at the center of gravity of the equilateral triangle. Each of these parts is fastened from the axial direction by a fastening mechanism 8 such as a fastening bolt via a holding member 7 that sandwiches the inner core 3, the outer core 41, and the joint core 42.

誘導コイル５は、図１及び図２に示すように、内側鉄心３の外側に巻回された内側誘導コイル５１と、外側鉄心の内側に巻回された外側誘導コイル５２とを有している。これら誘導コイル５１、５２は、内側鉄心３と同軸上に配置されている。誘導コイル５１、５２には、５０Ｈｚ又は６０Ｈｚの単相電源（図示なし）が接続される。なお、内側誘導コイル５１と外側誘導コイル５２とは互いに直列又は並列に接続されている。 As shown in FIGS. 1 and 2, the induction coil 5 has an inner induction coil 51 wound outside the inner core 3 and an outer induction coil 52 wound inside the outer core 3. .. These induction coils 51 and 52 are arranged coaxially with the inner iron core 3. A 50 Hz or 60 Hz single-phase power supply (not shown) is connected to the induction coils 51 and 52. The inner induction coil 51 and the outer induction coil 52 are connected in series or in parallel with each other.

予熱管６は、導体管２の巻回軸Ｃと同軸上に螺旋状（コイル状）に巻回されたものである。具体的に予熱管６は、図１及び図２に示すように、導体管２の内側に設けられ、螺旋状に巻回した内側予熱管６１と、導体管２の外側に設けられ、螺旋状に巻回した外側予熱管６２とを備えている。 The preheating tube 6 is wound in a spiral shape (coil shape) coaxially with the winding shaft C of the conductor tube 2. Specifically, as shown in FIGS. 1 and 2, the preheating tube 6 is provided inside the conductor tube 2 and spirally wound inside the inner preheating tube 61, and is provided outside the conductor tube 2 and has a spiral shape. It is provided with an outer preheating tube 62 wound around the surface.

内側予熱管６１は、導体管２と内側鉄心３との間、より具体的には導体管２と内側誘導コイル５１との間に設けられている。また、外側予熱管６２は、導体管２と外側鉄心４１との間、より具体的には、導体管２と外側誘導コイル５２との間に設けられている。 The inner preheating tube 61 is provided between the conductor tube 2 and the inner iron core 3, more specifically, between the conductor tube 2 and the inner induction coil 51. Further, the outer preheating tube 62 is provided between the conductor tube 2 and the outer iron core 41, more specifically, between the conductor tube 2 and the outer induction coil 52.

内側予熱管６１の一端部には、外部で生成された水蒸気が導入される導入ポート６１ｐが設けられている。また、内側予熱管６１の他端部は、外側予熱管６２の他端部に接続されている。さらに、外側予熱管６２の一端部は、導体管２の導入ポート２ｐ１に接続されている。つまり、内側予熱管６１の導入ポート６１ｐから導入された水蒸気は、内側予熱管６１及び外側予熱管６２を流れた後に、導体管２に流入する。 An introduction port 61p into which externally generated water vapor is introduced is provided at one end of the inner preheating tube 61. Further, the other end of the inner preheating tube 61 is connected to the other end of the outer preheating tube 62. Further, one end of the outer preheating tube 62 is connected to the introduction port 2p1 of the conductor tube 2. That is, the water vapor introduced from the introduction port 61p of the inner preheating tube 61 flows into the conductor tube 2 after flowing through the inner preheating tube 61 and the outer preheating tube 62.

ここで、内側予熱管６１の巻回方向と外側予熱管６２の巻回方向とは互いに逆向きとなるように構成されている。これにより、内側予熱管６１で誘起される誘起電圧の位相と外側予熱管６２で誘起される誘起電圧の位相とが逆となり、内側予熱管６１及び外側予熱管６２に発生する短絡電流を打ち消し合うことができる。 Here, the winding direction of the inner preheating tube 61 and the winding direction of the outer preheating tube 62 are configured to be opposite to each other. As a result, the phase of the induced voltage induced in the inner preheating tube 61 and the phase of the induced voltage induced in the outer preheating tube 62 are opposite to each other, and the short-circuit currents generated in the inner preheating tube 61 and the outer preheating tube 62 cancel each other out. be able to.

このように構成した過熱水蒸気生成装置１００において、誘導コイル５に単相電源により交流電圧を印加することで、内側誘導コイル５１及び外側誘導コイル５２に電流が流れて内側鉄心３及び磁路形成部４に磁束が流れる。当該磁束によって導体管２の内側管要素２１、外側管要素２２及び接続管要素２３ａ、２３ｂに短絡電流が流れて、導体管２がジュール発熱する。これにより、導体管２を流れる水蒸気が加熱されて過熱水蒸気が生成される。 In the superheated steam generator 100 configured in this way, by applying an AC voltage to the induction coil 5 by a single-phase power supply, a current flows through the inner induction coil 51 and the outer induction coil 52, and the inner iron core 3 and the magnetic path forming portion are formed. A magnetic flux flows through 4. Due to the magnetic flux, a short-circuit current flows through the inner tube element 21, the outer tube element 22, and the connecting tube elements 23a and 23b of the conductor tube 2, and the conductor tube 2 generates Joule heat. As a result, the steam flowing through the conductor tube 2 is heated to generate superheated steam.

ここで、本実施形態では、図１及び図２に示すように、導体管２の加熱温度により生じる巻回軸方向における温度勾配（温度分布）を小さくする伝熱部材９が設けられている。 Here, in the present embodiment, as shown in FIGS. 1 and 2, a heat transfer member 9 is provided to reduce the temperature gradient (temperature distribution) in the winding axis direction caused by the heating temperature of the conductor tube 2.

本実施形態の伝熱部材９は、導体管２の径方向内側に導体管２の巻回軸Ｃに沿って内側伝熱部材９１と、導体管２の径方向外側に導体管２の巻回軸Ｃに沿って外側伝熱部材９２とである。 In the heat transfer member 9 of the present embodiment, the inner heat transfer member 91 is radially inside the conductor tube 2 along the winding axis C of the conductor tube 2, and the conductor tube 2 is wound radially outside the conductor tube 2. It is an outer heat transfer member 92 along the shaft C.

内側伝熱部材９１は、導体管２と内側予熱管６１との間に設けられている。この内側伝熱部材９１は、周方向に亘って略全体に設けられている。具体的に内側伝熱部材９１は、内側予熱管６１を取り囲むように設けられており、軸方向に沿って一部にスリットが形成された例えばＣ形状等の部分円筒形状をなすものである。この内側伝熱部材９１としては、アルミニウムや銅等の熱伝導性に優れた材料からなる湾曲板である。 The inner heat transfer member 91 is provided between the conductor tube 2 and the inner preheating tube 61. The inner heat transfer member 91 is provided substantially in the circumferential direction. Specifically, the inner heat transfer member 91 is provided so as to surround the inner preheating tube 61, and has a partially cylindrical shape such as a C shape having a slit partially formed along the axial direction. The inner heat transfer member 91 is a curved plate made of a material having excellent thermal conductivity such as aluminum and copper.

外側伝熱部材９２は、導体管２と外側予熱管６２との間に設けられている。この外側伝熱部材９２は、周方向に亘って周方向に亘って略全体に設けられている。具体的に外側伝熱部材９２は、導体管２を取り囲むように設けられており、軸方向に沿って一部にスリットが形成された例えばＣ形状等の部分円筒形状をなすものである。この外側伝熱部材９２としては、アルミニウムや銅等の熱伝導性に優れた材料からなる湾曲板である。 The outer heat transfer member 92 is provided between the conductor tube 2 and the outer preheating tube 62. The outer heat transfer member 92 is provided on substantially the entire circumference in the circumferential direction. Specifically, the outer heat transfer member 92 is provided so as to surround the conductor tube 2, and has a partially cylindrical shape such as a C shape having a slit partially formed along the axial direction. The outer heat transfer member 92 is a curved plate made of a material having excellent thermal conductivity such as aluminum or copper.

この伝熱部材９により、導体管２の周辺部材（内側伝熱部材９１及び外側伝熱部材９２）の軸方向における温度分布を小さくすることができる。その結果、導体管２の過熱水蒸気の出口付近において内側伝熱部材９１及び外側伝熱部材９２の温度を下げることができるので、断熱材１０の使用量を削減することができる。また、断熱材１０の使用量を削減することにより、装置１００を小型化することができるとともに、材料コストを低減することができる。 With this heat transfer member 9, the temperature distribution in the axial direction of the peripheral members (inner heat transfer member 91 and outer heat transfer member 92) of the conductor tube 2 can be reduced. As a result, the temperatures of the inner heat transfer member 91 and the outer heat transfer member 92 can be lowered in the vicinity of the outlet of the superheated steam of the conductor tube 2, so that the amount of the heat insulating material 10 used can be reduced. Further, by reducing the amount of the heat insulating material 10 used, the device 100 can be miniaturized and the material cost can be reduced.

そして、図１に示すように、過熱水蒸気生成装置１００において導体管２、予熱管６及び伝熱部材９を覆うように断熱材１０が設けられている。なお、図２では断熱材は図示していない。 Then, as shown in FIG. 1, in the superheated steam generator 100, the heat insulating material 10 is provided so as to cover the conductor tube 2, the preheating tube 6, and the heat transfer member 9. The heat insulating material is not shown in FIG.

この断熱材１０は、挟持部材７の間において外側鉄心４１の内側の空間を埋めるように設けられている。具体的には、内側誘導コイル５１と内側予熱管６１との間、内側予熱管６１と内側伝熱部材９１との間、内側伝熱部材９１と内側管要素２１との間、内側管要素２１と外側管要素２２との間、外側管要素２２と外側伝熱部材９２との間、外側伝熱部材９２と外側予熱管６２との間、外側予熱管６２と外側誘導コイル５２との間、その他各部の空間を埋めるように設けられている。 The heat insulating material 10 is provided so as to fill the space inside the outer iron core 41 between the sandwiching members 7. Specifically, between the inner induction coil 51 and the inner preheating tube 61, between the inner preheating tube 61 and the inner heat transfer member 91, between the inner heat transfer member 91 and the inner tube element 21, the inner tube element 21. Between the outer tube element 22 and the outer tube element 22, between the outer tube element 22 and the outer heat transfer member 92, between the outer heat transfer member 92 and the outer preheat tube 62, between the outer preheat tube 62 and the outer induction coil 52, It is provided to fill the space of other parts.

然して、本実施形態の導体管２は、流路方向に沿って複数の材質から構成されている。具体的に導体管２は、図９に示すように、巻回軸方向に２分割して上流側部分２ｘと下流側部分２ｙとの２つに分けられており、それらが互いに異なる金属により形成されている。より詳細には、導体管２の内側管要素２１及び外側管要素２２の両方において、巻回軸方向のほぼ同じ位置において２分割されており、上流側部分２ｘと下流側部分２ｙとで異なる金属により形成されている。 Therefore, the conductor tube 2 of the present embodiment is made of a plurality of materials along the flow path direction. Specifically, as shown in FIG. 9, the conductor tube 2 is divided into two parts in the winding axis direction, an upstream side portion 2x and a downstream side portion 2y, which are formed of different metals. Has been done. More specifically, in both the inner tube element 21 and the outer tube element 22 of the conductor tube 2, the metal is divided into two at substantially the same position in the winding axis direction, and the upstream side portion 2x and the downstream side portion 2y are different metals. Is formed by.

そして、上流側部分２ｘを形成する金属の耐熱温度を、下流側部分２ｙを形成する金属の耐熱温度よりも低くしている。上流側部分２ｘを、汎用合金鋼であるステンレス鋼（例えばＳＵＳ３０４、ＳＵＳ３１６等）から形成し、下流側部分２ｙを、超耐熱鋼であるインコネルから形成している。 The heat-resistant temperature of the metal forming the upstream portion 2x is lower than the heat-resistant temperature of the metal forming the downstream portion 2y. The upstream portion 2x is formed of stainless steel (for example, SUS304, SUS316, etc.) which is a general-purpose alloy steel, and the downstream portion 2y is formed of Inconel which is a super heat-resistant steel.

ここで、上流側部分２ｘと下流側部分２ｙとは溶接により接続されている。これにより、導体管２の構成を簡略化するとともにその製造コストを削減することができる。ここで、溶接箇所２ｚの高温による損傷や劣化を避けるために、溶接部分の耐熱温度よりも低温となる位置に溶接箇所２ｚを設けている。本実施形態では、溶接箇所２ｚは、導体管２の中間部位よりも上流側に位置しており、上流側部分２ｘを短くして下流側部分２ｙを長くする構成となっている。 Here, the upstream side portion 2x and the downstream side portion 2y are connected by welding. As a result, the configuration of the conductor tube 2 can be simplified and the manufacturing cost thereof can be reduced. Here, in order to avoid damage or deterioration of the welded portion 2z due to the high temperature, the welded portion 2z is provided at a position where the temperature is lower than the heat resistant temperature of the welded portion. In the present embodiment, the welded portion 2z is located on the upstream side of the intermediate portion of the conductor pipe 2, and has a configuration in which the upstream side portion 2x is shortened and the downstream side portion 2y is lengthened.

＜２．本実施形態の効果＞
このように構成した過熱水蒸気生成装置１００によれば、導体管２の上流側部分２ｘと下流側部分２ｙとを異なる金属により形成しているので、導体管２の上流側部分２ｘの温度及び下流側部分２ｙの温度に合わせた材料選択を行うことができ、導体管２の合理的な設計が可能となり、導体管２の材料コストを低減することができる。 <2. Effect of this embodiment>
According to the superheated steam generator 100 configured in this way, since the upstream side portion 2x and the downstream side portion 2y of the conductor tube 2 are made of different metals, the temperature and the downstream side of the upstream side portion 2x of the conductor tube 2 are formed. The material can be selected according to the temperature of the side portion 2y, the rational design of the conductor tube 2 becomes possible, and the material cost of the conductor tube 2 can be reduced.

＜３．本発明の変形実施形態＞
なお、本発明は前記実施形態に限られるものではない。
例えば、前記実施形態の導体管２は、２重管構造をなすものであったが、１重管構造であっても良いし、４重管又はそれ以上の偶数重の管要素を有するものであっても良い。この場合、２つの管要素毎にそれぞれ接続管要素で接続する。例えば、前記実施形態の導体管２を同心円状に複数配置した構成とすることが考えられる。 <3. Modified Embodiment of the present invention>
The present invention is not limited to the above embodiment.
For example, the conductor tube 2 of the above-described embodiment has a double tube structure, but may have a single tube structure, or has a quadruple tube or more even-numbered tube elements. There may be. In this case, each of the two pipe elements is connected by a connecting pipe element. For example, it is conceivable to have a configuration in which a plurality of conductor tubes 2 of the above embodiment are arranged concentrically.

前記実施形態では導体管を流路方向に２つに分けて構成したものであったが、導体管を流路方向に３つ以上に分けて、互いに隣り合う分割要素を互いに異なる金属により形成してもよい。これにより、より合理的な設計を設計が可能となる。 In the above embodiment, the conductor tube is divided into two in the flow path direction, but the conductor tube is divided into three or more in the flow path direction, and the dividing elements adjacent to each other are formed of different metals. You may. This makes it possible to design a more rational design.

前記実施形態では、内側管要素２１と外側管要素２２の溶接箇所２ｚが巻回軸方向のほぼ同じ位置に設定されているが、それらの溶接箇所２ｚを巻回軸方向において異なる位置に設定しても良い。 In the above embodiment, the welded portions 2z of the inner pipe element 21 and the outer pipe element 22 are set at substantially the same positions in the winding axis direction, but the welded portions 2z are set at different positions in the winding axis direction. May be.

また、上流側部分と下流側部分とを形成する母材を共通として、下流側部分の管要素の内面に耐熱材の被膜を形成する等の耐熱加工を施してもよい。 Further, the base material forming the upstream side portion and the downstream side portion may be used in common, and heat resistant processing such as forming a film of a heat resistant material on the inner surface of the pipe element of the downstream side portion may be performed.

前記実施形態の伝熱部材は、Ｃ形状の湾曲板であったが、その他、ヒートパイプであっても良いし、内部に気液二相の熱媒体が封入されたジャケット室を有するヒートプレートであっても良い。その他、熱伝導性に優れた金属からなる複数の金属板を周方向に配置した構成としても良い。 The heat transfer member of the above embodiment is a C-shaped curved plate, but may be a heat pipe, or a heat plate having a jacket chamber in which a gas-liquid two-phase heat medium is enclosed. May be there. In addition, a plurality of metal plates made of a metal having excellent thermal conductivity may be arranged in the circumferential direction.

前記実施形態では、３つの外側鉄心４１を有する構成であったが、図１０に示すように２つの外側鉄心４１を有する構成としても良い。この場合、２つの外側鉄心４１は、内側鉄心３を挟むように両側に対向して設けられる。この場合、継鉄心４２は、例えば環状巻鉄心を直線状に変形させることにより構成することが考えられる。 In the above embodiment, the configuration has three outer cores 41, but as shown in FIG. 10, a configuration having two outer cores 41 may be used. In this case, the two outer cores 41 are provided facing each other on both sides so as to sandwich the inner core 3. In this case, it is conceivable that the joint core 42 is formed by, for example, linearly deforming the annular wound core.

前記実施形態の過熱水蒸気生成装置１００を複数用いて、それらの導体管２を直列接続したものであっても良い。この場合、外部から導入された水蒸気は、全ての過熱水蒸気生成装置１００の予熱管６を通過した後に各過熱水蒸気生成装置１００の導体管２に流入するように配管接続することが考えられる。 A plurality of superheated steam generators 100 of the above embodiment may be used and the conductor pipes 2 thereof may be connected in series. In this case, it is conceivable to connect the steam introduced from the outside by piping so as to flow into the conductor pipe 2 of each superheated steam generator 100 after passing through the preheated pipes 6 of all the superheated steam generators 100.

過熱水蒸気生成装置は、前記実施形態の構成に限られず、スコット変圧器を構成する脚鉄心に導体管を装着して、当該導体管を誘導加熱して水蒸気を加熱する構成であっても良い。この場合、スコット変圧器を構成する脚鉄心は３脚鉄心であり、その両側に位置する脚鉄心それぞれに導体管を巻回する構成とすることが考えられる。ここで一方の脚鉄心に巻回される第１の導体管は、水から水蒸気（例えば１２０℃）を生成するものとなり、他方の脚鉄心に巻回される第２の導体管は、前記水蒸気から過熱水蒸気を生成するものとなる。そのため、第１の導体管は、汎用合金鋼であるステンレス鋼から形成し、第２の導体管は、前記実施形態のように、上流側部分を汎用合金鋼であるステンレス鋼から形成し、下流側部分を超耐熱鋼であるインコネルで形成する。 The superheated steam generator is not limited to the configuration of the above embodiment, and may be configured such that a conductor tube is attached to a leg iron core constituting a Scott transformer and the conductor tube is induced and heated to heat steam. In this case, the leg iron core constituting the Scott transformer is a tripod core, and it is conceivable that the conductor tube is wound around each of the leg iron cores located on both sides thereof. Here, the first conductor tube wound around the one leg core produces steam (for example, 120 ° C.) from water, and the second conductor tube wound around the other leg core is the steam. Will generate superheated steam from. Therefore, the first conductor tube is formed of stainless steel, which is a general-purpose alloy steel, and the second conductor tube is formed of stainless steel, which is a general-purpose alloy steel, on the upstream side portion as in the above embodiment, and is downstream. The side part is formed of Inconel, which is a super heat resistant steel.

さらに、過熱水蒸気生成装置の加熱方式としては、前記実施形態のように誘導加熱方式の他、螺旋状に巻廻した導体管に直接電流を流すことによりジュール発熱させる通電加熱方式のものであっても良い。 Further, as the heating method of the superheated steam generator, in addition to the induction heating method as in the above embodiment, there is an energization heating method in which Joule heat is generated by directly passing an electric current through a conductor tube wound in a spiral shape. Is also good.

その他、本発明は前記実施形態に限られず、その趣旨を逸脱しない範囲で種々の変形が可能であるのは言うまでもない。 In addition, the present invention is not limited to the above-described embodiment, and it goes without saying that various modifications can be made without departing from the spirit of the present invention.

１００・・・過熱水蒸気生成装置
２ ・・・導体管
２ｘ ・・・上流側部分
２ｙ ・・・下流側部分
２ｚ ・・・溶接箇所 100 ・ ・ ・ Superheated steam generator 2 ・ ・ ・ Conductor pipe 2x ・ ・ ・ Upstream side part 2y ・ ・ ・ Downstream side part 2z ・ ・ ・ Welded part

Claims (6)

螺旋状に巻回した導体管を誘導加熱又は通電加熱することによって前記導体管内を流れる水蒸気を加熱して過熱水蒸気を生成する過熱水蒸気生成装置であって、
前記導体管は、上流側部分と下流側部分とで異なる非磁性金属により形成されている、過熱水蒸気生成装置。 A superheated steam generator that heats steam flowing in a conductor tube by induction heating or energization heating of a spirally wound conductor tube to generate superheated steam.
The conductor tube is a superheated steam generator in which the upstream portion and the downstream portion are made of different non-magnetic metals. 前記上流側部分を形成する非磁性金属の耐熱温度は、前記下流側部分を形成する非磁性金属の耐熱温度よりも低い、請求項１記載の過熱水蒸気生成装置。 The superheated steam generator according to claim 1, wherein the heat-resistant temperature of the non-magnetic metal forming the upstream portion is lower than the heat-resistant temperature of the non-magnetic metal forming the downstream portion. 前記上流側部分と前記下流側部分とは溶接により接続されている、請求項１又は２記載の過熱水蒸気生成装置。 The superheated steam generator according to claim 1 or 2, wherein the upstream portion and the downstream portion are connected by welding. 前記導体管は、前記水蒸気を７００℃以上に加熱するものである、請求項１乃至３の何れか一項に記載の過熱水蒸気生成装置。 The superheated steam generator according to any one of claims 1 to 3, wherein the conductor tube heats the steam to 700 ° C. or higher. 前記上流側部分は、非磁性のステンレス鋼から形成されており、
前記下流側部分は、インコネルから形成されている、請求項１乃至４の何れか一項に記載の過熱水蒸気生成装置。 The upstream portion is made of non-magnetic stainless steel.
The superheated steam generator according to any one of claims 1 to 4, wherein the downstream portion is formed of Inconel. 誘導加熱又は通電加熱されることにより内部を流れる水蒸気を加熱して過熱水蒸気を生成する導体管であって、
螺旋状に巻回されており、上流側部分と下流側部分とで異なる非磁性金属により形成されている、導体管。
A conductor tube that generates superheated steam by heating the steam flowing inside by induction heating or energization heating.
A conductor tube that is spirally wound and is made of different non-magnetic metals in the upstream and downstream parts.
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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008064367A (en) 2006-09-06 2008-03-21 Fuji Electric Systems Co Ltd Induction heating type steam generating device
JP2010177069A (en) 2009-01-30 2010-08-12 Dai Ichi High Frequency Co Ltd High-temperature fluid heating device
JP2016176613A (en) 2015-03-18 2016-10-06 トクデン株式会社 Overheated steam generation device
JP2017191680A (en) 2016-04-12 2017-10-19 トクデン株式会社 Fluid heating device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008064367A (en) 2006-09-06 2008-03-21 Fuji Electric Systems Co Ltd Induction heating type steam generating device
JP2010177069A (en) 2009-01-30 2010-08-12 Dai Ichi High Frequency Co Ltd High-temperature fluid heating device
JP2016176613A (en) 2015-03-18 2016-10-06 トクデン株式会社 Overheated steam generation device
JP2017191680A (en) 2016-04-12 2017-10-19 トクデン株式会社 Fluid heating device

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