US3903963A - Heat exchanger - Google Patents

Heat exchanger Download PDF

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Publication number
US3903963A
US3903963A US447206A US44720674A US3903963A US 3903963 A US3903963 A US 3903963A US 447206 A US447206 A US 447206A US 44720674 A US44720674 A US 44720674A US 3903963 A US3903963 A US 3903963A
Authority
US
United States
Prior art keywords
tubes
heating fluid
heat transfer
tube
drum
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
US447206A
Other languages
English (en)
Inventor
Ichiro Fuki
Shosaku Shimizu
Etsuji Yamamoto
Masahiko Yoshida
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.)
Mitsui Engineering and Shipbuilding Co Ltd
Original Assignee
Mitsui Engineering and Shipbuilding Co Ltd
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
Application filed by Mitsui Engineering and Shipbuilding Co Ltd filed Critical Mitsui Engineering and Shipbuilding Co Ltd
Application granted granted Critical
Publication of US3903963A publication Critical patent/US3903963A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B23/00—Water-tube boilers built-up from sets of spaced double-walled water tubes of return type in unilateral abutting connection with a boiler drum or with a header box, i.e. built-up from Field water tubes comprising an inner tube arranged within an outer unilaterally-closed tube
    • F22B23/04—Water-tube boilers built-up from sets of spaced double-walled water tubes of return type in unilateral abutting connection with a boiler drum or with a header box, i.e. built-up from Field water tubes comprising an inner tube arranged within an outer unilaterally-closed tube the water-tube, i.e. Field-tube, sets being vertical or substantially vertical
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D1/00—Evaporating
    • B01D1/06—Evaporators with vertical tubes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B1/00—Methods of steam generation characterised by form of heating method
    • F22B1/02—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers
    • F22B1/18—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines
    • F22B1/1838—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines the hot gas being under a high pressure, e.g. in chemical installations
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/10—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged one within the other, e.g. concentrically
    • F28D7/12—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged one within the other, e.g. concentrically the surrounding tube being closed at one end, e.g. return type

Definitions

  • ABSTRACT Heat exchanger comprising a bundle of a plurality of Foreign Application Prioriiy Data triple tubes each of which consists of heating fluid Mar. 6, 1973 Passing tube and a heat transfer tube With a Closed end at the position near the heating fluid inlet end of the heating fluid passing tube, and an inner tube provided in the heat transfer tube with an open end near the closed end of the heating fluid passing tube.
  • This invention relates to a heat exchanger for use in boilers and the like.
  • the heat transfer tubes are secured at one end or both ends to headers.
  • high temperature for instance 350 to 600C
  • heat transfer tubes of the heat exchanger are subjected to considerable thermal stress, even if the tubes are spirally wound to absorb deformations due to thermal expansion.
  • the heat exchanger comprises a bundle of a number of triple tubes, each of which consists of a heating fluid passing tube with both ends flared to form tube plates and a double tube inserted therein which comprises an outer heat transfer tube and an inner tube.
  • thermal stress is not caused in the heat transfer tubes because the tubes are secured only at one end.
  • FIG. 1 is a vertical sectional view of a heat exchanger in accordance with this invention
  • FIG. 2 is an illustration as viewed from arrow AA in FIG. 1;
  • F IG. 3 is a sectional view taken along lines B-C-D in FIG. 2;
  • FIG. 4 is a vertical section of another embodiment of this invention.
  • a cylindrical drum generally designated by numeral 1 is provided inside with a number of gas passage tubes 2 and double tubes inserted into said gas passage tubes respectively, each of said double tubes comprising an inner tube 3 and an outer heat transfer tube 4.
  • the gas passage tubes 2 are made of heat resisting steel and disposed in triangular arrangement. Both ends of each gas passages tube are flared in the hexagonal shape as illustrated in FIG. 2.
  • the upper end of each gas passage tube is welded to the upper ends of adjacent gas passage tubes to form a tube plate, while the lower ends of the gas passage tubes are free without welding to each other, but their flared ends act as a tube plate.
  • the upper end of the so formed tube bundle is welded to a ring 5 at the peripheral edge, which in turn is welded to a drum mantle 6 to support the gas passage tubes.
  • the periphery of the lower end of the tube bundle is sealed by the gland 10.
  • the lower end of the drum mantle 6 is connected to a gas inlet cover 8 lined with an inner lining 7 ofinsulating material by a pair of flanges 9.
  • the upper end of the drum mantle 6 is connected to a gas outlet chamber 18, having an outlet 17, by a pair of flanges 19.
  • the separator drum is provided with a water supply box 21 and connected to the upper end of the drum 1.
  • each inner tube 3 is secured to the bottom of the water supply box 21 and communicated therein.
  • the upper end of each heat transfer tube 4 is secured to the bottom of the separator drum 20 and opens into the drum.
  • the lower end of each heat transfer tube 4 terminates near the lower end of the gas passage tube 2 and is closed with the spherical shape as shown in FIG. 3.
  • the lower end of the inner tube 3 terminates near the lower end of the heat transfer tube 4 and is opened.
  • gas such as cracked gas is introduced into the drum 1 through the inlet 31 and ascends the spaces between the tubes 2 and 4 and exhausts from the outlet 17 provided on the side of the gas outlet chamber 18.
  • liquid to be heated is introduced into the box 21 in the separator drum 20 through the supply pipe 22 and descends in tubes 3 and ascends in the space between the tubes 3 and 4 after turning at the bottom of the tube 4 and returns to the box 21.
  • Steam generated in the tubes 4 ascends in the tubes and the drum 20 and exhausts from the outlet 23.
  • the heat exchanger shown in FIG. 4 may treat two kinds of heating fluid which are different in properties such as boiling point from each other.
  • the device has two heat exchange parts 24 and 25 and an intermediate outlet chamber 26 provided with an outlet 27.
  • the gas outlet 28 is provided with a branch nozzle 29 and a shut off valve 30. Corresponding parts to those of the device shown in FIG. 1 and designated by the same numerical references as in FIG. 1.
  • the outlet 27 is closed.
  • the valve 30 is closed and a pressure gas such as steam is introduced from the branch nozzle 29 in order to prevent the gas to be treated from ascending throughthe heat exchange part 24 so that the gas is exhausted from the outlet 27.
  • a pressure gas such as steam is introduced from the branch nozzle 29 in order to prevent the gas to be treated from ascending throughthe heat exchange part 24 so that the gas is exhausted from the outlet 27.
  • tubes 3 and 4 may be connected to headers respectively, which headers are connected to a separator drum.
  • this invention provides a heat exchanger in which heat trans fer tubes are not subjected to thermal stress, because thermal expansion of each tube is permitted at the free end thereof.
  • a heat exchanger comprising:
  • a drum having a heating fluid inlet and a heating fluid outlet
  • each of said heating fluid passing tubes being open at both ends;
  • At least one inner tube disposed in each of said heat transfer tubes and open at the end thereof nearer tubes nearer said heating fluid inlet free to expand and contract with respect to said drum in response to temperature changes.
  • each of said heating fluid passing tubes is flared into a hexagonal cross section, each of said flared ends being positioned adjacent but spaced from others of said flared ends.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
US447206A 1973-03-06 1974-03-01 Heat exchanger Expired - Lifetime US3903963A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP48026412A JPS5227855B2 (ro) 1973-03-06 1973-03-06

Publications (1)

Publication Number Publication Date
US3903963A true US3903963A (en) 1975-09-09

Family

ID=12192823

Family Applications (1)

Application Number Title Priority Date Filing Date
US447206A Expired - Lifetime US3903963A (en) 1973-03-06 1974-03-01 Heat exchanger

Country Status (10)

Country Link
US (1) US3903963A (ro)
JP (1) JPS5227855B2 (ro)
AU (1) AU467391B2 (ro)
BR (1) BR7401663D0 (ro)
CA (1) CA985270A (ro)
DE (1) DE2410495A1 (ro)
FR (1) FR2220764B1 (ro)
GB (1) GB1466476A (ro)
IT (1) IT1003732B (ro)
NO (1) NO135079C (ro)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4785877A (en) * 1986-05-16 1988-11-22 Santa Fe Braun Inc. Flow streamlining device for transfer line heat exchanges
EP1122491A1 (en) * 2000-02-01 2001-08-08 Wärtsilä Technology Oy AB Heat recovery apparatus and method of minimising fouling in a heat recovery apparatus
CN107543428A (zh) * 2017-09-07 2018-01-05 西安交通大学 一种用于核电工业的紧凑式换热器

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6042843B2 (ja) * 1979-07-30 1985-09-25 東洋エンジニアリング株式会社 廃熱ボイラ−
IT1138595B (it) * 1980-09-12 1986-09-17 Mitsubishi Heavy Ind Ltd Scambiatore di calore a rapido raffreddamento e metodo di decokizzazione dello stesso
JPS57157991A (en) * 1981-03-23 1982-09-29 Mitsui Eng & Shipbuild Co Ltd Heat exchanger for decomposed gas
DE3170290D1 (en) * 1981-09-08 1985-06-05 Dow Chemical Nederland Heat exchanger and use thereof
JPS5845403A (ja) * 1981-09-10 1983-03-16 三井造船株式会社 管外側を分解ガスの流路とする急冷熱交換器
JPS5964643U (ja) * 1982-10-26 1984-04-28 中山　博 植木鉢
CN112610938A (zh) * 2020-12-17 2021-04-06 武汉蓝颖新能源有限公司 一种基于生物质燃烧的多源供热装置及其使用方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1745978A (en) * 1927-02-24 1930-02-04 Cahill Gerald Heat-interchange apparatus
US2117337A (en) * 1934-11-03 1938-05-17 Lobl Karel Evaporator
US2232272A (en) * 1938-10-12 1941-02-18 Superheater Co Ltd Tubular heat exchange element
US2475025A (en) * 1946-10-26 1949-07-05 Universal Oil Prod Co Reactor for close temperature control

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB122563A (en) * 1918-04-22 1919-01-30 Arthur Whitten Brown Improvements in Condensers and Coolers for Steam and other Fluids.
US1974834A (en) * 1933-05-26 1934-09-25 Sadwith Ryan Heat interchanger

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1745978A (en) * 1927-02-24 1930-02-04 Cahill Gerald Heat-interchange apparatus
US2117337A (en) * 1934-11-03 1938-05-17 Lobl Karel Evaporator
US2232272A (en) * 1938-10-12 1941-02-18 Superheater Co Ltd Tubular heat exchange element
US2475025A (en) * 1946-10-26 1949-07-05 Universal Oil Prod Co Reactor for close temperature control

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4785877A (en) * 1986-05-16 1988-11-22 Santa Fe Braun Inc. Flow streamlining device for transfer line heat exchanges
EP1122491A1 (en) * 2000-02-01 2001-08-08 Wärtsilä Technology Oy AB Heat recovery apparatus and method of minimising fouling in a heat recovery apparatus
US6626237B2 (en) 2000-02-01 2003-09-30 Wartsila Technology Oy Ab Heat recovery apparatus and method of minimizing fouling in a heat recovery apparatus
CN107543428A (zh) * 2017-09-07 2018-01-05 西安交通大学 一种用于核电工业的紧凑式换热器

Also Published As

Publication number Publication date
FR2220764B1 (ro) 1976-10-08
BR7401663D0 (ro) 1974-11-05
CA985270A (en) 1976-03-09
AU467391B2 (en) 1975-11-27
JPS5227855B2 (ro) 1977-07-22
JPS49113254A (ro) 1974-10-29
AU6614674A (en) 1975-08-28
NO135079C (ro) 1977-02-02
IT1003732B (it) 1976-06-10
NO135079B (ro) 1976-10-25
GB1466476A (en) 1977-03-09
DE2410495A1 (de) 1974-09-26
FR2220764A1 (ro) 1974-10-04

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