JPH09243283A - Heat exchanging metallic tube equipped with inner surface projection - Google Patents
Heat exchanging metallic tube equipped with inner surface projectionInfo
- Publication number
- JPH09243283A JPH09243283A JP4585896A JP4585896A JPH09243283A JP H09243283 A JPH09243283 A JP H09243283A JP 4585896 A JP4585896 A JP 4585896A JP 4585896 A JP4585896 A JP 4585896A JP H09243283 A JPH09243283 A JP H09243283A
- Authority
- JP
- Japan
- Prior art keywords
- tube
- pipe
- projections
- heat exchange
- straight line
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F1/00—Tubular elements; Assemblies of tubular elements
- F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
- F28F1/40—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only inside the tubular element
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Geometry (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、管内面に分散形成
された突起による高い熱交換性を有し、例えばエチレン
製造用反応管等として有用な熱交換用金属管に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a metal tube for heat exchange, which has a high heat exchange property due to projections formed dispersed on the inner surface of the tube and is useful as, for example, a reaction tube for ethylene production.
【０００２】[0002]
【従来の技術及び発明が解決しようとする課題】エチレ
ン製造用熱分解炉では、炭化水素類（ナフサ，天然ガ
ス，エタン等）を含む混合流体を反応管内に供給し、高
速流通させながら、管の外部からの熱供給により熱分解
反応を行わせ、熱分解反応生成物として、エチレン，プ
ロピレン等のオレフィンを得る。その熱分解操業におい
ては、管内を高速流通する流体への熱伝達を効率よく行
わせ、迅速に所定の反応温度域に加熱昇温することが要
求される。上記反応管の熱伝達性を高める方策として、
管内壁面に突起を形成することが有効である（特開平６
−１０９３９２号公報）。これは、その突起が管内流体
に対する攪拌要素として機能し、乱流形成の効果とし
て、管内流体を、管内断面中心部まで急速に所要温度に
加熱昇温することを可能とするのである。突起による熱
伝達性能の向上効果は、管路の長さの大幅な短縮、装置
のコンパクト化、運転管理の簡素化、管内流体の送給速
度の増大、製造能力の増大等の多大の効果をもたらす。
本発明は、熱伝達性能の改善を目的として、管内面に形
成される攪拌要素である突起の効果的な形状・分布形態
を有する新規熱交換用管を提供しようとするものであ
る。2. Description of the Related Art In a pyrolysis furnace for ethylene production, a mixed fluid containing hydrocarbons (naphtha, natural gas, ethane, etc.) is supplied into a reaction tube, and the tube is fed at high speed. A thermal decomposition reaction is performed by supplying heat from the outside, and olefins such as ethylene and propylene are obtained as a thermal decomposition reaction product. In the pyrolysis operation, it is required to efficiently perform heat transfer to the fluid flowing at a high speed in the tube and to quickly heat and raise the temperature to a predetermined reaction temperature range. As a measure to enhance the heat transfer property of the reaction tube,
It is effective to form protrusions on the inner wall surface of the pipe (Japanese Patent Laid-Open No. 6-242242)
-109392). This is because the protrusion functions as a stirring element for the fluid in the pipe, and as a result of the turbulent flow formation, the fluid in the pipe can be rapidly heated to the required temperature up to the central portion of the cross section of the pipe. The effect of improving heat transfer performance by the projection is to greatly reduce the length of the pipe line, downsize the device, simplify operation management, increase the feed rate of the fluid in the pipe, increase the production capacity, etc. Bring
The present invention is intended to provide a novel heat exchange tube having an effective shape and distribution of protrusions, which are stirring elements formed on the inner surface of the tube, for the purpose of improving heat transfer performance.
【０００３】[0003]
【課題を解決するための手段】本発明の熱交換用金属管
は、管内流体の攪拌要素として、管路の入側端から出側
端に到る１もしくは複数の領域ないしほぼ全域の管内面
に、周期的もしくはランダムな分布を有する突起が分散
形成されていることを特徴としている。The metal pipe for heat exchange of the present invention serves as an agitating element for the fluid in the pipe, and one or a plurality of regions from the inlet end to the outlet end of the pipe line or almost the entire inner face of the pipe. In addition, protrusions having a periodic or random distribution are dispersedly formed.
【０００４】[0004]
【発明の実施の形態】管内面の形成される突起は、例え
ば、管軸とほぼ平行な向きもしくは管軸とほぼ直交する
向きの直線列もしくは波状列をなして断続的に散在し、
または管軸に対し適宜傾斜角をもって管軸方向に螺回す
る直線列もしくは波状列をなして断続的に散在する分散
分布パターンが与えられる。管内面の突起を、断続的な
分散分布形態とすることにより、連続的なすじ状突起と
して形成した場合に比し、突起による管内面の凹凸起伏
による管内流体の圧力損失を緩和しつつ、管内流体に対
する攪拌要素として機能させることが容易となり、エチ
レン製造用反応管では、管内反応系から析出する固形炭
素の付着沈積を緩和し、コーキングを低減し、熱分解操
業の安定維持に奏効する。BEST MODE FOR CARRYING OUT THE INVENTION The projections formed on the inner surface of the pipe are, for example, linearly or corrugated in a direction substantially parallel to the tube axis or substantially orthogonal to the tube axis, and are intermittently scattered.
Alternatively, a distributed distribution pattern is provided which is intermittently scattered in a straight line or a wavy line that is screwed in the tube axis direction with an appropriate inclination angle with respect to the tube axis. Compared to the case where the projections on the inner surface of the pipe are formed as continuous ridge-shaped projections by forming an intermittent distribution distribution pattern, the pressure loss of the fluid inside the pipe due to the unevenness of the projection It becomes easy to function as a stirring element for the fluid, and in the ethylene production reaction tube, the adhesion and deposition of solid carbon deposited from the reaction system in the tube is mitigated, coking is reduced, and the pyrolysis operation is stably maintained.
【０００５】図１〜図３は、管内面に形成された突起の
形状を模式的に示している。（１）は母材管体、（２）
は突起である。図１は母材管体（１）の内面に直接突起
（２）を形成した例、図２は管体（１）の内面に下盛層
（３）を設け、これに突起（２）を積層形成した例、図
３は管体（１）として、材種の異なる合金からなる外層
（１1 ）と内層（１2 ）からなる同心円状積層構造を有
する二層管の内面（内層表面）に突起（２）を形成した
例を示している。突起（２）および下盛層（３）は、粉
体プラズマアーク溶接，ＴＩＧ溶接等による肉盛ビード
として形成することができる。1 to 3 schematically show the shapes of protrusions formed on the inner surface of the pipe. (1) is the base material tube, (2)
Is a protrusion. FIG. 1 shows an example in which the projection (2) is formed directly on the inner surface of the base material pipe body (1), and FIG. 2 shows that an underlaying layer (3) is provided on the inner surface of the pipe body (1) and the projection (2) is formed on it. FIG. 3 shows an example of a laminated body, in which the inner surface (inner surface) of a two-layer tube having a concentric laminated structure consisting of an outer layer (1 1 ) and an inner layer (1 2 ) made of alloys of different materials An example in which a protrusion (2) is formed on the surface is shown. The protrusion (2) and the lower layer (3) can be formed as a build-up bead by powder plasma arc welding, TIG welding, or the like.
【０００６】突起（２）のサイズ（高さ２H,幅２W,長さ
２L 等）、および管内面上の分布形態は、熱交換用管の
用途・使用条件，管サイズ等により適宜設計される。例
えば、エチレン製造用反応管（管内径約３０〜１５０m
m）では、突起高さ２H 約２〜１５mm，幅２W 約３〜１
０mmとする例が挙げられ、その分散形態については、図
４における直線列もしくは波状列の各列（Ｌa,Ｌb ）の
突起（２）同士の断点の間隔（Ｄ1 ）は約１〜５０mm、
列上の突起の長さ（２L ）は約３〜１００mm、隣合う列
間の間隔（Ｄ2 ）は約３〜４００mmとする例が挙げられ
る。ランダムな分散分布パターンを与える場合の突起の
サイズおよび分布密度も上記と同じように設計すること
ができる。また、管内面の突起の形成領域は、具体的用
途・使用態様等により適宜設定され、エチレン製造用反
応管の場合には、図５のように、管路の入側近くの領域
（Ａ1 ）、中央領域（Ａ2 ）、または出側端近くの領域
（Ａ3 ）、あるいはその複数個所の領域、あるいは管路
のほぼ全長に亘る領域に形成される。The size of the projections (2) (height 2 H, width 2 W, length 2 L, etc.) and the distribution form on the inner surface of the tube are appropriately selected depending on the use and use conditions of the heat exchange tube, the tube size, etc. Designed. For example, a reaction tube for ethylene production (tube inner diameter of about 30 to 150 m
In m), the height of the protrusion is 2 H about 2 to 15 mm, and the width 2 W is about 3 to 1
As an example of the dispersion form, the interval (D 1 ) between the break points between the projections (2) of each straight line or wavy line (L a, L b ) in FIG. ~ 50mm,
For example, the length (2 L ) of the protrusions on a row is about 3 to 100 mm, and the distance (D 2 ) between adjacent rows is about 3 to 400 mm. The size and distribution density of protrusions when giving a random distribution pattern can be designed in the same manner as above. The area where the projections are formed on the inner surface of the pipe is appropriately set depending on the specific application and use mode. In the case of a reaction tube for ethylene production, as shown in FIG. 5, the area near the inlet side of the pipe (A 1 ), A central region (A 2 ), a region (A 3 ) near the exit end, or a plurality of regions thereof, or a region extending over substantially the entire length of the conduit.
【０００７】図６〜図９は、管内面の突起の形設パター
ンの例を示している。図６は、管軸（ｘ）とほぼ平行な
向きをなす直線列に沿って、管内面（１3 ）に突起
（２）を断続的に反復形成した例である。図７は、直線
列に代え、波状列をなすように突起（２）を断続形成し
た例である。また、図８は、突起（２）を、管軸（ｘ）
とほぼ直交する向きの直線列に沿って断続的に反復形成
し、図９に示す突起（２）は、管軸（ｘ）に対し傾斜す
る向きに管内面（１3 ）螺回する直線列に沿って断続的
に反復形成した例である。FIGS. 6 to 9 show examples of forming patterns of protrusions on the inner surface of the pipe. FIG. 6 is an example in which the projections (2) are intermittently and repeatedly formed on the inner surface (1 3 ) of the tube along a straight line extending in a direction substantially parallel to the tube axis (x). FIG. 7 shows an example in which the protrusions (2) are intermittently formed so as to form a wavy line instead of the straight line. Further, in FIG. 8, the projection (2) is replaced by the tube axis (x).
The projections (2) shown in FIG. 9 are repeatedly formed intermittently along a straight line in a direction substantially orthogonal to the above, and the projection (2) is a straight line in which the pipe inner surface (1 3 ) is screwed in a direction inclined with respect to the pipe axis (x). It is an example in which it was repeatedly formed intermittently along.
【０００８】図１０は、管内面の突起（２）を、粉体プ
ラズマアーク溶接による肉盛ビードとして形成する溶接
施工例を示している。管体（１）は、管軸（ｘ）を中心
とする回転運動が可能なように、回転駆動ローラ等の回
転装置（図示せず）の上に、水平姿勢に載置されてい
る。（４）は溶接トーチ、（６）は溶接トーチ支持杆で
あり、溶接トーチ（４）はアーム（５）を介して溶接ト
ーチ支持杆（６）に固定されている。溶接トーチ支持杆
（６）には、必要に応じて複数個の溶接トーチ（４）が
取付けられる。溶接トーチ支持杆（６）は、管軸（ｘ）
に平行な向きをなし、駆動装置（図示せず）により管軸
方向に移動可能なように管内に配置されている。（７）
は、粉体溶接材料を溶接トーチ（４）に供給するパウダ
供給管である。FIG. 10 shows an example of welding work in which the projection (2) on the inner surface of the pipe is formed as a build-up bead by powder plasma arc welding. The tube body (1) is placed in a horizontal position on a rotating device (not shown) such as a rotation driving roller so that the tube body (1) can rotate about the tube axis (x). (4) is a welding torch, (6) is a welding torch support rod, and the welding torch (4) is fixed to the welding torch support rod (6) via an arm (5). If necessary, a plurality of welding torches (4) are attached to the welding torch support rod (6). The welding torch support rod (6) has a tube axis (x)
And is arranged in the tube so as to be movable in the tube axial direction by a driving device (not shown). (7)
Is a powder supply pipe for supplying the powder welding material to the welding torch (4).
【０００９】上記のように構成された溶接装置におい
て、溶接トーチ（４）を管軸方向に移動させながら、管
内面（１3 ）に対する肉盛ビードの形成を断続的に行う
ことにより、管軸（ｘ）と平行な向きの直線列に沿って
断続する突起（２）が形成される。その操作を、円周方
向の複数個所において反復実施することにより、前記図
６に示す管軸（ｘ）と平行な向きの直線列をなして突起
（２）が分散した分布パターンを有する熱交換用管が得
られる。その溶接施工において、溶接トーチ（４）に、
その移送方向と直交する向きの揺動運動を与えることに
より、図７に示すような波状列をなす突起（２）の分布
パターンを形成することができる。In the welding device constructed as described above, the welding torch (4) is moved in the pipe axis direction, and the build-up bead is intermittently formed on the pipe inner surface (1 3 ). Protrusions (2) are formed intermittently along a straight line parallel to (x). By repeating the operation at a plurality of positions in the circumferential direction, a heat exchange having a distribution pattern in which the projections (2) are dispersed in a straight line direction parallel to the tube axis (x) shown in FIG. The pipe is obtained. In the welding process, on the welding torch (4),
By giving a swinging motion in a direction orthogonal to the transfer direction, it is possible to form a distribution pattern of the protrusions (2) forming a wavy row as shown in FIG. 7.
【００１０】また、管体（１）を、管軸（ｘ）を中心に
回転させながら、円周方向に溶接トーチ（４）による肉
盛ビードの形成を断続的に行うことにより、図８に示す
ように、管軸（ｘ）と直交する向きの直線列をなして断
続する突起（２）が形成される。更に、管体（１）を回
転させると共に、溶接トーチ（４）を管軸（ｘ）方向に
移動させながら、肉盛ビードの形成を断続実施すること
により、図９に示すように、管内面（１3 ）を螺回する
直線列上に沿って断続する突起（２）が形成される。い
ずれも場合にも、溶接トーチ（４）に、直線列と直交す
る向きの揺動運動を与えれば、波状列に沿って断続的に
分布する突起（２）が形成される。Further, while the pipe body (1) is rotated around the pipe axis (x), the build-up beads are intermittently formed by the welding torch (4) in the circumferential direction, so that FIG. As shown, the projections (2) that are intermittent in a straight line in a direction orthogonal to the tube axis (x) are formed. Further, while the pipe body (1) is rotated and the welding torch (4) is moved in the pipe axis (x) direction, the build-up beads are intermittently formed, so that the pipe inner surface is formed as shown in FIG. Protrusions (2) are formed intermittently along the straight line on which (1 3 ) is screwed. In any case, when the welding torch (4) is subjected to a swinging motion in a direction orthogonal to the straight line, protrusions (2) that are intermittently distributed along the wavy line are formed.
【００１１】母材管体（１）の材種は、用途・使用条件
に応じて適宜選択される。エチレン製造用反応管を対象
として、突起を形成する場合の管体は、耐熱合金鋼、例
えばASTM HK 40材（0.4C-20Ni-25Cr-Fe), HP材(0.5C-35
Ni-25Cr-Fe) 、あるいは0.5C-45Ni-30Cr-Fe 、0.5C-35N
i-25Cr、インコロイ合金(45Cr-Ni系) 等からなる管体が
使用される。エチレン製造用反応管では、熱分解操業中
の管内反応系から固形炭素が析出し、管内側面に付着沈
積する所謂コーキング現象（固形炭素の付着は、管体の
浸炭による材質劣化を早める原因となる）の問題があ
る。管内側面の突起（２）の形成に付随して、突起の表
面ないしその近傍の固形炭素の付着沈積が助長されるよ
うな場合には、耐コーキング性・耐浸炭性の改良された
合金材種を溶接肉盛材料として、突起（２）の肉盛溶接
を行うとよい。また、必要に応じて、前記図２のよう
に、下盛層（３）を設けて突起（２）を積層形成する構
造を採用し、あるいは図３のように母材管体（１）に、
外層（１ 1 ）と内層（１2 ）からなる２層構造をもた
せ、下盛層（３）や内層（１2 ）に改良合金材種を適用
すると共に、突起（２）を改良合金材種で形成するとよ
い。その場合の下盛相（３）の形状・サイズ、内層（１
2 ）の層厚等は管体の使用条件によるが、例えば、図２
における下盛層（３）は、幅（３W ）約２W ＋１５〜２
W ＋２５mm、厚さ（３t ）約１〜３mm、図３の二層管の
内層（１2 ）の層厚（１2t）は、約０．３〜５mmとする
ことができる。The material type of the base material tube (1) is intended for use and conditions of use.
It is selected as appropriate. For reaction tubes for ethylene production
For forming the projections, the tube is made of heat-resistant alloy steel, eg
For example, ASTM HK 40 material (0.4C-20Ni-25Cr-Fe), HP material (0.5C-35)
Ni-25Cr-Fe), or 0.5C-45Ni-30Cr-Fe, 0.5C-35N
A tubular body made of i-25Cr, Incoloy alloy (45Cr-Ni type), etc.
used. The reaction tube for ethylene production is undergoing pyrolysis operation
Solid carbon precipitates from the reaction system inside the tube and adheres to the inner surface of the tube.
So-called caulking phenomenon (accumulation of solid carbon is
(It causes material deterioration due to carburization).
You. Along with the formation of the projection (2) on the inner surface of the tube, the surface of the projection is
The deposition of solid carbon on or near the surface is promoted.
In such cases, improved caulking resistance and carburization resistance
Overlay welding of protrusions (2) using an alloy grade as a weld overlay material
Good to do. In addition, if necessary, as shown in FIG.
And a projection layer (3) is laminated on the lower layer (3).
Structure, or as shown in FIG. 3, in the base material tube (1),
Outer layer (1 1) And inner layer (1Two) Has a two-layer structure
The lower layer (3) and the inner layer (1Two) For improved alloy grade
In addition, the protrusions (2) should be made of the improved alloy grade.
Yes. In that case, the shape and size of the underlay phase (3), the inner layer (1
TwoThe layer thickness of) depends on the usage conditions of the tubular body, for example, as shown in FIG.
The underlayment layer (3) at the width (3W) About 2W+15 to 2
W+ 25mm, thickness (3t) About 1-3 mm,
Inner layer (1Two) Layer thickness (12t) Is about 0.3-5 mm
be able to.
【００１２】上記の耐コーキング性・耐浸炭性の改良合
金材種として、Ｃ: 0.1 〜0.6 ％, Ｓｉ:4.0％以下，Ｍ
ｎ:5.0％以下，Ｎｉ: 30.0〜50.0％（Ｎｉはその２０％
以下をＣｏと置換してよい），Ｃｒ:20.0 〜50.0％，Ａ
ｌ: 4.0 ％以下，所望により、Ｗ:10 ％以下，Ｃａ:0.5
％以下，Ｈｆ:1.0％以下，Ｙ:1.0％以下の群より選ばれ
る１種ないし２種以上の元素、および／またはＮｂ: 4.
0 ％以下，Ｍｏ:5.0％以下，Ｔｉ:1.0％以下，Ｚｒ:1.0
％以下、希土類元素:0.5％以下，Ｂ:0.5％以下の群より
選ばれる１種ないし２種以上の元素を含有し、残部実質
的にＦｅからなる耐熱合金、Ｃ:0.02 〜0.6 ％，Ｓｉ:
4.0％以下，Ｍｎ:5.0％以下，Ｃｒ:40.0 〜52.0％，所
望により、Ａｌ:4.0％以下，Ｗ:10.0 ％以下，Ｃａ:0.5
％以下，Ｈｆ:1.0％以下，Ｙ:1.0％以下の群より選ばれ
る１種ないし２種以上の元素，および／またはＮｂ:0.4
％以下，Ｍｏ:5.0％以下，Ｔｉ:1.0％以下，Ｚｒ:1.0％
以下，希土類元素:0.5％以下，Ｂ:0.5％以下の群より選
ばれる１種ないし２種以上の元素を含有し、残部実質的
にＮｉ（Ｎｉの一部は２０％以下のＣｏと置換してよ
い）からなる耐熱合金、等が挙げられる。As the above-mentioned improved alloy grades of caulking resistance and carburizing resistance, C: 0.1 to 0.6%, Si: 4.0% or less, M
n: 5.0% or less, Ni: 30.0-50.0% (Ni is 20% of that)
The following may be replaced with Co), Cr: 20.0 to 50.0%, A
l: 4.0% or less, if desired, W: 10% or less, Ca: 0.5
% Or less, Hf: 1.0% or less, Y: 1.0% or less, and / or Nb: 4.
0% or less, Mo: 5.0% or less, Ti: 1.0% or less, Zr: 1.0
% Or less, rare earth element: 0.5% or less, B: 0.5% or less, a heat-resistant alloy containing one or more elements selected from the group consisting essentially of Fe, C: 0.02 to 0.6%, Si :
4.0% or less, Mn: 5.0% or less, Cr: 40.0 to 52.0%, if desired, Al: 4.0% or less, W: 10.0% or less, Ca: 0.5
% Or less, Hf: 1.0% or less, Y: 1.0% or less, and one or more elements selected from the group, and / or Nb: 0.4
% Or less, Mo: 5.0% or less, Ti: 1.0% or less, Zr: 1.0%
Hereafter, one or more elements selected from the group consisting of rare earth elements: 0.5% or less and B: 0.5% or less are contained, and the balance is substantially Ni (part of Ni is replaced with 20% or less of Co). A heat-resistant alloy, etc.
【００１３】[0013]
【発明の効果】本発明の熱交換用管は、管内面の突起に
よる管内流体に対する攪拌作用により高い熱伝達性能を
有し、また突起が断続的な分散パターンであることによ
り、突起による管内流体の圧力損失も緩和される。本発
明の熱交換用管をエチレン製造用熱分解炉の反応管とし
て適用する場合は、管内流体の高速送給の維持，管径拡
大等による製造能力の大幅な増大、あるいは管長の短縮
による炉のコンパクト設計、炉内配管本数の削減による
運転管理の容易化等が可能となり、その工業的価値は極
めて大である。本発明の熱交換用管は、この他に、例え
ば蒸気発生用ボイラーチューブ，都市ゴミ焼却炉発電用
スーパーヒータチューブ，鋼材熱処理炉用ラジアントチ
ューブ, 還元製鉄用プレヒータチューブ等として有用で
あり、その高熱伝達性能により、設備能力の増強，コン
パクト化，運転管理の負担軽減等の効果を奏する。INDUSTRIAL APPLICABILITY The heat exchange tube of the present invention has high heat transfer performance due to the stirring action of the projections on the inner surface of the tube to the fluid in the tube, and the projections have an intermittent dispersion pattern, so The pressure loss of is also eased. When the heat exchange tube of the present invention is applied as a reaction tube of a pyrolysis furnace for ethylene production, the furnace is provided by maintaining high-speed feed of fluid in the tube, greatly increasing the production capacity by increasing the tube diameter, or shortening the tube length. The compact design and the reduction of the number of pipes in the furnace enable easy operation management, and its industrial value is extremely large. In addition to this, the heat exchange tube of the present invention is useful as, for example, a steam generation boiler tube, a municipal waste incinerator power generation super heater tube, a steel material heat treatment furnace radiant tube, a reduction iron preheater tube, and the like. The transmission performance has the effect of increasing equipment capacity, making it compact, and reducing the burden of operation management.
【図１】本発明における管内面の突起形状の説明図であ
る。FIG. 1 is an explanatory view of a projection shape on an inner surface of a tube according to the present invention.
【図２】本発明における管内面の突起形状の説明図であ
る。FIG. 2 is an explanatory view of the shape of protrusions on the inner surface of the tube according to the present invention.
【図３】本発明における管内面の突起形状の説明図であ
る。FIG. 3 is an explanatory view of the shape of protrusions on the inner surface of the pipe in the present invention.
【図４】管内側面の突起の断続分布の平面説明図であ
る。FIG. 4 is an explanatory plan view of an intermittent distribution of protrusions on the inner surface of the tube.
【図５】突起が形成される管内領域の説明図である。FIG. 5 is an explanatory diagram of a pipe inner region where a protrusion is formed.
【図６】突起の分布形態の例を示す管軸方向断面図であ
る。FIG. 6 is a tube axial direction sectional view showing an example of a distribution form of protrusions.
【図７】突起の分布形態の例を示す管軸方向断面図であ
る。FIG. 7 is a sectional view in the tube axis direction showing an example of a distribution form of protrusions.
【図８】突起の分布形態の例を示す管軸方向断面図であ
る。FIG. 8 is a tube axial direction sectional view showing an example of a distribution form of protrusions.
【図９】突起の分布形態の例を示す管軸方向断面図であ
る。FIG. 9 is a sectional view in the tube axis direction showing an example of a distribution form of protrusions.
【図１０】溶接肉盛による突起の形成施工を示す断面図
である。FIG. 10 is a cross-sectional view showing a process of forming protrusions by welding overlay.
１: 管体 １1 : 外層 １2 : 内層 １3 : 管内面 ２: 突起 ３: 下盛層 ４: 溶接トーチ ５: アーム ６: 溶接トーチ支持杆 ７: 溶接材料供給パイプ1: tube 1 1: external layer 1 2: inner layer 1 3: inner surface 2: projections 3: avaiable layer 4: welding torch 5: arm 6: welding torch supporting rod 7: Welding material supply pipe
───────────────────────────────────────────────────── フロントページの続き (72)発明者 大坪 憲司 大阪府枚方市中宮大池１丁目１番１号 株 式会社クボタ枚方製造所内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kenji Otsubo 1-1-1 Nakaike Oike, Hirakata City, Osaka Prefecture Kubota Hirakata Manufacturing Company
Claims (6)
端から出側端に到る１もしくは複数の領域ないしほぼ全
域の管内面に、周期的もしくはランダムな分布を有する
突起が分散形成されていることを特徴とする内面突起付
き熱交換用金属管。1. As a stirring member for a fluid in a pipe, projections having a periodic or random distribution are dispersedly formed on the inner surface of one or a plurality of regions from the inlet end to the outlet end of the pipe line or almost the entire region. A metal tube for heat exchange with an inner surface protrusion that is characterized in that
もしくは波状列をなして断続的に反復形成されているこ
とを特徴とする請求項１に記載の熱交換用金属管。2. The metal pipe for heat exchange according to claim 1, wherein the projections are intermittently and repeatedly formed in a straight line or a wavy line in a direction substantially parallel to the tube axis.
列もしくは波状列をなして断続的に反復形成されている
ことを特徴とする請求項１に記載の熱交換用金属管。3. The metal pipe for heat exchange according to claim 1, wherein the projections are intermittently and repeatedly formed in a straight line or a wavy line in a direction substantially orthogonal to the tube axis.
管軸方向に螺回する１条ないし複数条の直線列もしくは
波状列をなして断続的に反復形成されていることを特徴
とする請求項１に記載の熱交換用金属管。4. The projection is intermittently and repeatedly formed in one or more straight rows or wavy rows that are screwed in the tube axis direction at an appropriate inclination angle with respect to the tube axis. The metal tube for heat exchange according to claim 1.
ていることを特徴とする請求項１ないし請求項４のいず
れか１項に記載の熱交換用金属管。5. The heat exchange metal tube according to claim 1, wherein the protrusion is formed as a weld overlay bead.
とする請求項１ないし請求項５のいずれか１項に記載の
熱交換用金属管。6. The heat exchange metal tube according to claim 1, which is a reaction tube for ethylene production.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4585896A JPH09243283A (en) | 1996-03-04 | 1996-03-04 | Heat exchanging metallic tube equipped with inner surface projection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4585896A JPH09243283A (en) | 1996-03-04 | 1996-03-04 | Heat exchanging metallic tube equipped with inner surface projection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH09243283A true JPH09243283A (en) | 1997-09-19 |
Family
ID=12730916
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4585896A Pending JPH09243283A (en) | 1996-03-04 | 1996-03-04 | Heat exchanging metallic tube equipped with inner surface projection |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH09243283A (en) |
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|---|---|---|---|---|
| WO2004046277A1 (en) * | 2002-11-15 | 2004-06-03 | Kubota Corporation | Cracking tube with spiral fin |
| WO2008120699A1 (en) * | 2007-03-30 | 2008-10-09 | Kubota Corporation | Thermal decomposition tube |
| CN100451531C (en) * | 2005-03-25 | 2009-01-14 | 清华大学 | Water heater heat exchange tube |
| JP2009250450A (en) * | 2008-04-01 | 2009-10-29 | Kubota Corp | Pyrolytic pipe |
| JP2011500910A (en) * | 2007-10-19 | 2011-01-06 | マノワール アンデュストリィ | Tubes with large inner surface used for furnaces, manufacturing methods and uses |
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| JP5155163B2 (en) * | 2006-07-05 | 2013-02-27 | 新日鐵住金株式会社 | Metal tube for pyrolysis reaction |
| WO2016072393A1 (en) * | 2014-11-07 | 2016-05-12 | シャープ株式会社 | Photovoltaic thermal hybrid panel and photovoltaic thermal hybrid system |
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-
1996
- 1996-03-04 JP JP4585896A patent/JPH09243283A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4744746B2 (en) * | 2001-09-06 | 2011-08-10 | 臼井国際産業株式会社 | Heat transfer tube and multi-tube heat exchanger using this heat transfer tube and radiator built-in oil cooler |
| KR101028052B1 (en) * | 2002-11-15 | 2011-04-08 | 가부시끼 가이샤 구보다 | Cracking tube with spiral fin |
| JPWO2004046277A1 (en) * | 2002-11-15 | 2006-03-16 | 株式会社クボタ | Cracking tube with spiral fin |
| CN100342199C (en) * | 2002-11-15 | 2007-10-10 | 株式会社久保田 | Cracking tube with spiral fin |
| WO2004046277A1 (en) * | 2002-11-15 | 2004-06-03 | Kubota Corporation | Cracking tube with spiral fin |
| US7799963B2 (en) | 2002-11-15 | 2010-09-21 | Kubota Corporation | Cracking tube having helical fins |
| CN100451531C (en) * | 2005-03-25 | 2009-01-14 | 清华大学 | Water heater heat exchange tube |
| JP5155163B2 (en) * | 2006-07-05 | 2013-02-27 | 新日鐵住金株式会社 | Metal tube for pyrolysis reaction |
| JP2008249249A (en) * | 2007-03-30 | 2008-10-16 | Kubota Corp | Thermal decomposition pipe |
| US8231837B2 (en) | 2007-03-30 | 2012-07-31 | Kubota Corporation | Thermal cracking tube |
| WO2008120699A1 (en) * | 2007-03-30 | 2008-10-09 | Kubota Corporation | Thermal decomposition tube |
| KR101411658B1 (en) * | 2007-03-30 | 2014-06-25 | 구보다코포레이션 | Thermal decomposition tube |
| JP2011500910A (en) * | 2007-10-19 | 2011-01-06 | マノワール アンデュストリィ | Tubes with large inner surface used for furnaces, manufacturing methods and uses |
| JP2009250450A (en) * | 2008-04-01 | 2009-10-29 | Kubota Corp | Pyrolytic pipe |
| WO2016072393A1 (en) * | 2014-11-07 | 2016-05-12 | シャープ株式会社 | Photovoltaic thermal hybrid panel and photovoltaic thermal hybrid system |
| US11155756B2 (en) | 2014-12-16 | 2021-10-26 | Exxonmobil Chemical Patents Inc. | Pyrolysis furnace tubes |
| WO2018204060A1 (en) * | 2017-05-05 | 2018-11-08 | Exxonmobil Chemical Patents Inc. | Heat transfer tube for hydrocarbon processing |
| US11053445B2 (en) | 2017-05-05 | 2021-07-06 | Exxonmobil Chemical Patents Inc. | Heat transfer tube for hydrocarbon processing |
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