EP0658736B1 - Echangeur de chaleur tubulaire à ailettes - Google Patents

Echangeur de chaleur tubulaire à ailettes Download PDF

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Publication number
EP0658736B1
EP0658736B1 EP93850231A EP93850231A EP0658736B1 EP 0658736 B1 EP0658736 B1 EP 0658736B1 EP 93850231 A EP93850231 A EP 93850231A EP 93850231 A EP93850231 A EP 93850231A EP 0658736 B1 EP0658736 B1 EP 0658736B1
Authority
EP
European Patent Office
Prior art keywords
fins
heat exchanger
tubular body
carbon content
ribs
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.)
Expired - Lifetime
Application number
EP93850231A
Other languages
German (de)
English (en)
Other versions
EP0658736A1 (fr
Inventor
Sven Häkan Nilsson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Alfa Laval Aalborg AS
Original Assignee
ABB Sunrod AB
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=8215312&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0658736(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by ABB Sunrod AB filed Critical ABB Sunrod AB
Priority to ES93850231T priority Critical patent/ES2101285T3/es
Priority to DK93850231.7T priority patent/DK0658736T3/da
Priority to DE59305979T priority patent/DE59305979D1/de
Priority to EP93850231A priority patent/EP0658736B1/fr
Priority to NO944756A priority patent/NO303087B1/no
Priority to FI945801A priority patent/FI945801A/fi
Priority to US08/355,072 priority patent/US5626187A/en
Priority to PL94306258A priority patent/PL306258A1/xx
Priority to JP30894194A priority patent/JP3567000B2/ja
Priority to CN94119606A priority patent/CN1052065C/zh
Priority to KR1019940033986A priority patent/KR100359141B1/ko
Publication of EP0658736A1 publication Critical patent/EP0658736A1/fr
Publication of EP0658736B1 publication Critical patent/EP0658736B1/fr
Application granted granted Critical
Priority to GR970400842T priority patent/GR3023182T3/el
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
    • F28F21/08—Constructions of heat-exchange apparatus characterised by the selection of particular materials of metal
    • F28F21/081—Heat exchange elements made from metals or metal alloys
    • F28F21/082—Heat exchange elements made from metals or metal alloys from steel or ferrous alloys
    • 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
    • F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
    • 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
    • F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
    • F28F1/124—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and being formed of pins
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
    • F28F21/08—Constructions of heat-exchange apparatus characterised by the selection of particular materials of metal

Definitions

  • the present invention relates to a heat exchange element with a tubular body and surface enlarging elements present thereon consisting of a number of fins welded to the outside of the body and pointing outwards from the latter, the tubular body and the entire fins being made of carbon steel.
  • a heat exchanger is known from WO-A-9 002 917.
  • finned tube heat exchangers which are also referred to as finned tubes
  • finned tubes are known in a wide variety of designs and are used for various purposes.
  • such finned tubes are very often used for cylinder steam boilers.
  • generic finned tube heat exchangers have long been used for extracting heat from the flue gases as they pass through flue gas tubes, the flue gas tubes extending vertically upwards through the water and steam space above the boiler firing.
  • the finned tubes are arranged coaxially to the flue gas tubes and within the flue gas tubes and connected to the water and steam space mentioned in order to ensure heat transfer to the medium in question here.
  • a disadvantage of these known finned tubes is that a tendency to form cracks in the weld joint between the fins and the tubular body or between the latter and adjacent parts of the fins has often been found. This tendency is particularly noticeable for ribs which are bent by a cold deformation after welding to the tubular body, but can also occur with other ribs. In practice, the tendency to crack formation described above can cause serious problems. Very small initial cracks that arise during the production process can actually grow larger despite their originally minimal size Broaden cracks and gradually weaken the ribs in such a way that they are broken off from the tubular body by applying greater mechanical forces, such as those that occur, for example, when cleaning the flue gas ducts in which the finned tubes are arranged.
  • the purpose of the present invention is to provide an improved heat exchange element of the type described in the generic type, in which the risk of cracking as described above is largely eliminated.
  • the finned tube heat exchanger proposed according to the invention is characterized in that the fins are made from a carbon content with a significantly lower carbon content than the carbon content of the carbon content used for the production of the tubular body.
  • the invention is based on the knowledge that the tendency towards any cracks, which is found in known finned tubes, can be attributed to the fact that the material in the parts of the fins that adjoin the tubular body is heated and then cooled when the fins are welded on the tubular body, get an increased brittleness due to the accidental hardening.
  • the invention also proceeds from the finding that this inadvertent hardening is related to the fact that the fins were previously made from normal commercial grade carbon steel with approximately the same carbon content as the material used to make the tubular body.
  • tubular body is usually made of a carbon steel with a carbon content of at least about 0.1%
  • Ribs are preferably made from a material with a carbon content of at most about 0.05%.
  • the ribs can preferably be produced from a material with a carbon content of only about 0.03%.
  • the use of a steel with a very low carbon content in the ribs proposed according to the invention results in a further advantage in addition to the above-mentioned reduction in the risk of crack formation.
  • the low carbon content leads to an improved thermal conductivity of the ribs, and thus to an improved thermal efficiency of the ribs and consequently to an improved total heat transfer coefficient of the tubular body.
  • the cylinder steam boiler shown only partially in FIG. 1, generally designated 10, is provided with a furnace 11 and a pressure vessel 12 present above it, the latter forming the water and steam space of the boiler.
  • Various vertical flue gas pipes 13 extend through the pressure vessel 12 and discharge the flue gases from the furnace 11 to a flue gas hood 14 located above the pressure vessel 12, from which the flue gases can be drawn off via a flue gas outlet 15.
  • each flue gas pipe 13 there is a finned-tube heat exchanger, generally designated 16, consisting of a tubular body 17 and surface enlarging elements arranged thereon.
  • these surface enlargement elements consist of a large number of ribs 18, one end of which is welded to the outside of the tubular body 17 and which protrude outwards from the body.
  • Each finned tube heat exchanger 16 is provided at its lower end with an inlet line 19, by means of which the heat exchanger with that formed in the pressure vessel 12 Water and steam space is connected via an opening 20 in the wall of the associated flue gas pipe 13, while the heat exchanger is provided at its upper end with an outlet line 21, by means of which the heat exchanger with the pressure vessel 12 via an opening 22 in the wall of the flue gas pipe 13 communicates.
  • the finned tube heat exchangers 16 can be provided with fins 18 which protrude in radial directions from the tubular body 17 and which are at least the same length over most of the tubular body.
  • the ribs 18 can preferably be formed in the manner shown in FIG. 3, namely with a decreasing length in the direction of the lower end of the tubular body in order to ensure this that they are not exposed to excessive warming.
  • the upper part of the tubular body can also be equipped with bent ribs of greater length, ie after the normal ribs have been welded to the tubular body. Such a longer and bent rib 18 'is indicated in Fig. 2 with dash-dotted lines.
  • Both the tubular body 17 and the ribs 18 are made of carbon steel.
  • the tubular body 17 is in a known manner made of a material with an appropriate carbon content of at least about 0.1% in order to achieve the desired strength properties.
  • the material used for the production of the ribs 18 should preferably have a maximum carbon content of approximately 0.05%. If the ribs as indicated in Fig. 2 for the rib 18 'is after welding on the tubular If the body is exposed to a deformation, it is advisable to manufacture these ribs from a material with a carbon content of only about 0.03%.
  • the invention is not limited to the embodiments described above and shown in FIGS. 1-4, but can also be used for finned tube heat exchangers of another design. 5, 6 and 7, examples of other uses for finned tube heat exchanges 16 ', 16' 'and 16' '' are illustrated.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Geometry (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Details Of Heat-Exchange And Heat-Transfer (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)

Claims (3)

  1. Echangeur de chaleur tubulaire à ailettes (16) comportant un corps tubulaire (17) et des éléments d'agrandissement de surface présents sur celui-ci et qui sont constitués par un grand nombre d'ailettes (18) dirigées vers l'extérieur par rapport à ce corps et soudées sur le côté extérieur du corps (17), aussi bien la totalité des ailettes (18) que le corps (17) étant fabriqués à partir d'un acier au carbone, caractérisé en ce que les ailettes (18) sont réalisées à partir d'un acier au carbone ayant une teneur en carbone considérablement plus faible que la teneur en carbone de l'acier au carbone utilisé pour la fabrication du corps tubulaire (17).
  2. Echangeur de chaleur tubulaire à ailettes selon la revendication 1, caractérisé en ce que les ailettes (18) sont fabriquées à partir d'un acier au carbone ayant une teneur en carbone de 0,05 % au plus.
  3. Echangeur de chaleur tubulaire à ailettes selon la revendication 2, caractérisé en ce que les ailettes (18) sont fabriquées à partir d'un acier au carbone ayant une teneur en carbone d'environ 0,03 %.
EP93850231A 1993-12-14 1993-12-14 Echangeur de chaleur tubulaire à ailettes Expired - Lifetime EP0658736B1 (fr)

Priority Applications (12)

Application Number Priority Date Filing Date Title
ES93850231T ES2101285T3 (es) 1993-12-14 1993-12-14 Intercambiador de calor con cuerpo en forma tubular.
DK93850231.7T DK0658736T3 (da) 1993-12-14 1993-12-14 Ribberørsvarmeveksler
DE59305979T DE59305979D1 (de) 1993-12-14 1993-12-14 Rippenrohrwärmeaustauscher
EP93850231A EP0658736B1 (fr) 1993-12-14 1993-12-14 Echangeur de chaleur tubulaire à ailettes
NO944756A NO303087B1 (no) 1993-12-14 1994-12-08 Varmevekslerr÷r
FI945801A FI945801A (fi) 1993-12-14 1994-12-09 Lämmönvaihdinputki
US08/355,072 US5626187A (en) 1993-12-14 1994-12-13 Heat-exchanger tube
PL94306258A PL306258A1 (en) 1993-12-14 1994-12-13 Heat exchanger tube
JP30894194A JP3567000B2 (ja) 1993-12-14 1994-12-13 熱交換チューブ
CN94119606A CN1052065C (zh) 1993-12-14 1994-12-13 热交换器管
KR1019940033986A KR100359141B1 (ko) 1993-12-14 1994-12-13 열교환튜브
GR970400842T GR3023182T3 (en) 1993-12-14 1997-04-21 Heat exchanger with finned tubes.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP93850231A EP0658736B1 (fr) 1993-12-14 1993-12-14 Echangeur de chaleur tubulaire à ailettes

Publications (2)

Publication Number Publication Date
EP0658736A1 EP0658736A1 (fr) 1995-06-21
EP0658736B1 true EP0658736B1 (fr) 1997-03-26

Family

ID=8215312

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93850231A Expired - Lifetime EP0658736B1 (fr) 1993-12-14 1993-12-14 Echangeur de chaleur tubulaire à ailettes

Country Status (12)

Country Link
US (1) US5626187A (fr)
EP (1) EP0658736B1 (fr)
JP (1) JP3567000B2 (fr)
KR (1) KR100359141B1 (fr)
CN (1) CN1052065C (fr)
DE (1) DE59305979D1 (fr)
DK (1) DK0658736T3 (fr)
ES (1) ES2101285T3 (fr)
FI (1) FI945801A (fr)
GR (1) GR3023182T3 (fr)
NO (1) NO303087B1 (fr)
PL (1) PL306258A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE505923C2 (sv) * 1996-01-26 1997-10-20 Aalborg Ind As Anordning vid inloppsrör till värmeväxlingsenhet i rökgastub
WO2005095879A1 (fr) * 2004-04-01 2005-10-13 Aalborg Industries A/S Echangeur thermique et chaudiere comportant un tel echangeur thermique
KR100640290B1 (ko) * 2005-01-29 2006-11-10 강림기연 주식회사 열교환 튜브의 제조방법
US7823544B2 (en) * 2008-01-04 2010-11-02 Ecr International, Inc. Steam boiler

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2093686A (en) * 1936-10-27 1937-09-21 Jr Thomas E Murray Method of and means for operating boilers of certain types
US2566318A (en) * 1949-03-21 1951-09-04 Svenska Maskinverken Ab Method of making an extended surface heat exchange device or similar composite article
US2719354A (en) * 1950-11-13 1955-10-04 Svenska Maskinverken Ab Method of making extended surface heat exchanger
US3731738A (en) * 1971-07-26 1973-05-08 H Cooper Tube fins of outwardly-organized materials
SE346370B (fr) * 1971-09-03 1972-07-03 Svenska Maskinverken Ab
NO134341C (fr) * 1972-04-14 1976-09-22 Nybu Bruk Aktiebolag
JPS5760194A (en) * 1980-09-27 1982-04-10 Nippon Kentetsu Co Ltd Fin tube
JPS57153105A (en) * 1981-03-18 1982-09-21 Mitsubishi Heavy Ind Ltd Mounting of anticorrosive stud
JPS5965273U (ja) * 1982-10-21 1984-05-01 前田　勉 ボイラチユ−ブ
JPS6066901U (ja) * 1983-10-07 1985-05-13 三菱重工業株式会社 防食スタツド
JPS61284530A (ja) * 1985-06-12 1986-12-15 Nippon Steel Corp 加工性，接着性，耐蝕性に優れた鋼箔の製造法
US4714049A (en) * 1986-10-08 1987-12-22 Dorr-Oliver Incorporated Apparatus to reduce or eliminate fluid bed tube erosion
SE462002B (sv) * 1988-09-09 1990-04-23 Brava Patent & Invent Handelsb Saett och anordning foer vaegning av i synnerhet svaart sjuka saengliggande patienter
SE8803193L (sv) * 1988-09-12 1990-03-13 Gadelius Sunrod Ab Vaermevaexlartub med ytfoerstorande element
SE8803215D0 (sv) * 1988-09-13 1988-09-13 Gadelius Sunrod Ab Ytforstoringselement for vermevexlartub
JP2660577B2 (ja) * 1989-06-09 1997-10-08 エービービー株式会社 回転再生式熱交換装置用難燃性伝熱エレメント集積体
US5107798A (en) * 1991-04-08 1992-04-28 Sage Of America Co. Composite studs, pulp mill recovery boiler including composite studs and method for protecting boiler tubes
JPH05320753A (ja) * 1992-05-21 1993-12-03 Kawasaki Steel Corp 高温強度の優れた炭素鋼の製造方法

Also Published As

Publication number Publication date
DK0658736T3 (da) 1997-10-13
JPH07253285A (ja) 1995-10-03
DE59305979D1 (de) 1997-04-30
NO303087B1 (no) 1998-05-25
KR950019613A (ko) 1995-07-24
NO944756D0 (no) 1994-12-08
US5626187A (en) 1997-05-06
EP0658736A1 (fr) 1995-06-21
NO944756L (no) 1995-06-15
KR100359141B1 (ko) 2003-02-11
FI945801A0 (fi) 1994-12-09
JP3567000B2 (ja) 2004-09-15
CN1052065C (zh) 2000-05-03
FI945801A (fi) 1995-06-15
ES2101285T3 (es) 1997-07-01
PL306258A1 (en) 1995-06-26
CN1106918A (zh) 1995-08-16
GR3023182T3 (en) 1997-07-30

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