EP1491836A1 - Falling film tube bundle heat exchanger - Google Patents

Falling film tube bundle heat exchanger Download PDF

Info

Publication number
EP1491836A1
EP1491836A1 EP20030014714 EP03014714A EP1491836A1 EP 1491836 A1 EP1491836 A1 EP 1491836A1 EP 20030014714 EP20030014714 EP 20030014714 EP 03014714 A EP03014714 A EP 03014714A EP 1491836 A1 EP1491836 A1 EP 1491836A1
Authority
EP
European Patent Office
Prior art keywords
tube
tube bundle
mantle
inferior
superior
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP20030014714
Other languages
German (de)
English (en)
French (fr)
Inventor
Federico Zardi
Paolo Sticchi
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.)
Casale SA
Original Assignee
Urea Casale SA
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 Urea Casale SA filed Critical Urea Casale SA
Priority to EP20030014714 priority Critical patent/EP1491836A1/en
Priority to CNB2004100369629A priority patent/CN100362304C/zh
Publication of EP1491836A1 publication Critical patent/EP1491836A1/en
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • 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
    • F28D3/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium flows in a continuous film, or trickles freely, over the conduits
    • F28D3/04—Distributing arrangements
    • 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
    • F28D3/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium flows in a continuous film, or trickles freely, over the conduits
    • F28D3/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium flows in a continuous film, or trickles freely, over the conduits with tubular conduits

Definitions

  • the present invention relates to a tube bundle heat exchanger, with vertical tubes, useful for carrying out heat exchange between at least two fluids, with the so-called falling film technique.
  • a heat exchanger of the said type generally comprises a plurality of rectilinear tubes, grouped to form a tube bundle through at least two tube plates, positioned near the opposite ends of said tubes, that are open on the outside of the plates themselves.
  • a first fluid called main fluid in the rest of the description, for example a solution to be concentrated, goes down alongside the inner wall of the tubes, without filling them, forming a thin film, that leaves a considerable empty space in the centre of the tubes themselves and for their whole length;
  • a second fluid called operating fluid in he rest of the description, flows in the heat exchanger, from the outside of the respective tube bundle, coming into contact with the external wall of every single tube.
  • the vertical tubes that constitute such a tube bundle, have opposite ends open and in fluid communication with the outside of the exchanger. Moreover, to grant the formation of a respective main fluid "falling film" in every vertical tube, in every upper end of said tubes a crop end of tube is coaxially engaged, fitted, in an intermediate position, with one or more through radial holes at predetermined distance from the underlying tube plate.
  • a predetermined liquid head of the solution to be concentrated is formed above said holes, which solution overflow through the holes inside the crop ends of the tubes, forming the desired liquid film.
  • said crop end of tube is also called ferule.
  • a falling film heat exchanger is as much widely used, in which at least two distinct zones are defined, separated one from the other, tightened against a fluid under pressure, and crossed by the same vertical tubes of the only tube bundle comprised in said heat exchanger, each of said zones being intended to be crossed by a respective operating fluid.
  • the known art provides a cylindrical mantle with vertical axis, closed at the opposite ends by respective walls or bottoms, a falling film tube bundle with vertical tubes, axially extended in said mantle having tube plates, respectively upper and bottom, fixed gas tight to said mantle, in proper spaced relationship from said bottoms.
  • a third tube plate, in-between the previous, is circumferentially fixed, gas tight, to said mantle.
  • the tubes are engaged tightly in said tubular plates, generally by flaring.
  • the descending film heat exchangers structured in the above schematically described way have recognized drawbacks, among which the most relevant one is represented by the difficulty to assure the necessary and desired tightness between the two (or more) different zones in which every exchanger is subdivided.
  • Such difficulty is above all due to the welding and flaring operations that, besides being numerous, have to be carried out in objectively awkward conditions.
  • the problem underlying the present invention is that of providing a falling film tube bundle heat exchanger, with vertical tubes, of the above mentioned type, having structural and functional characteristics so as to allow a substantial simplification of the assembly and setting operations of the tube bundle inside the respective mantle, disengaging said operations from the exchanger height, from the tube length, so as to assure in every case the tightness between the different inner heat exchange zones of the exchanger itself, so as to overcome all the drawbacks mentioned with reference to the prior art.
  • a falling film tube bundle heat exchanger with vertical tubes comprising a cylindrical mantle with vertical axis closed to the opposite ends by respective bottoms, superior and inferior, characterized in that it comprises:
  • a heat exchanger 1 of the so-called descending film type comprises a mantle 2, with a vertical axis A-A, closed at the opposite ends by respective bottoms, upper 3 and lower 4, fixed thereto through respective flanges 3a, 4a; a first descending film-tube bundle F 1 , with vertical tubes 5, is axially extended in said mantle 2, with tube plates 6, 7 respectively superior and inferior, circumferentially fixed, tightened against a fluid under pressure, to the mantle 2 itself.
  • the tubes 5 have opposite ends 5a, 5b open and extending externally to the respective tube plates 6, 7.
  • a second tube bundle F 2 with vertical tubes 8 is mounted, with tube plates 9, 10, respectively superior and inferior, circumferentially fixed, tightened against a fluid under pressure, to the mantle itself.
  • the tubes 8 also have opposite ends 8a, 8b open and extending from the respective tube plates 9, 10.
  • the first zone 11 is comprised between the superior end 3 and the superior tube plate 6 of the first tube bundle F 1 ;
  • the second zone 12 is comprised between the tube plates 6, 7 of said first tube bundle F 1 ;
  • the third zone 13 is comprised between the inferior tube plate 7 of the first tube bundle F 1 and the superior tube plate 9 of the second tube bundle F 2 ;
  • the fourth zone 14 is comprised between the tube bundles 9, 10 of the second tube bundle F 2 ;
  • the fifth zone 15 is comprised between the tube plate 10 of the second tube bundle F 2 and the inferior bottom 4 of said mantle 2.
  • the first zone 11 is in fluid communication with the outside through a duct 16, provided for the input of main fluid, for example, a solution to be concentrated, and trough a duct 17, for the output of the possible vapors freed inside the tubes 5 of the first tube bundle F 1 .
  • a duct 16 provided for the input of main fluid, for example, a solution to be concentrated, and trough a duct 17, for the output of the possible vapors freed inside the tubes 5 of the first tube bundle F 1 .
  • the superior ends 5a of the tubes 5 of the first tube bundle F 1 are open.
  • the second zone 12, or heat exchange zone is separated, tightened against a fluid under pressure, from said zone 11, while it is in fluid communication with the outside of the mantle 2 trough ducts, superior 18 and inferior 19.
  • the duct 18 is used for the input of a heat exchange operating fluid.
  • the fourth zone 14, heat exchange zone too, is in communication with the outside of the mantle 2 through a superior duct 20, for the input of a second heat exchange operating fluid and through an inferior duct 21 that provides for the output of said fluid from the heat exchanger 1.
  • Said heat exchange zones 12, 14 are mutually spaced in the axis A-A direction, from the third zone 13, from which they are separated, tightened against a fluid under pressure.
  • the inferior ends 5b of the tubes 5 of the first tube bundle F 1 and the superior ends 8b of the tubes 8 of the second tube bundle F 2 are open.
  • the fifth zone 15, or gathering zone, that constitutes a kind of tank for collecting the concentrate solution is separated, tightened against a fluid under pressure, from said zone 14, while it is in communication with the outside of the exchanger 1 through a duct 22 for the output of said solution.
  • the inferior ends 8b of the tubes 8 of the second tube bundle F 2 are separated, tightened against a fluid under pressure, from said zone 14, while it is in communication with the outside of the exchanger 1 through a duct 22 for the output of said solution.
  • said liquid may fill, even only partially, the central "empty" zone of the tube, in the distribution zone 11, the one comprised between the upper bottom 3 of the heat exchanger of the present invention, and the first tube bundle F 1 , a plurality of per se known ferules 23 is operating, one for each tube 5.
  • every ferule 23 has end 24b free, open in said distribution zone 11 and, in an intermediate position, is fitted with one or more through radial holes at predetermined distance from the underlying tube plate 6, so as to form a liquid head (solution to be concentrated) in the distribution zone 11.
  • a plurality of ferules 26 (Fig. 3) is active, one for each tube 8 of the second tube bundle F 2 .
  • This liquid head is substantially maintained constant by, for example, the already partially concentrated solution (main fluid) that is fed in said 13, by gravity ("rains"), from the tubes 5, of the overhanging first tube bundle F 1 .
  • said ferules 26 are closed above (Fig. 3), while they are fitted with further appropriate radial apertures 27, in positions suited to allow the output of the gaseous flux possibly freed in the tubes of the second tube bundle F 2 .
  • the heat exchanger according to the present invention has structural and functional characteristics so as to substantially simplify the assembly and setting operations of the tube bundle inside the respective mantle, allowing the disengagement of said operations from the exchanger height, and obtaining the vantage of assuring in every case the tightness between the different inner heat exchange zones of the exchanger itself.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
EP20030014714 2003-06-27 2003-06-27 Falling film tube bundle heat exchanger Withdrawn EP1491836A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP20030014714 EP1491836A1 (en) 2003-06-27 2003-06-27 Falling film tube bundle heat exchanger
CNB2004100369629A CN100362304C (zh) 2003-06-27 2004-04-20 降膜管束热交换器

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20030014714 EP1491836A1 (en) 2003-06-27 2003-06-27 Falling film tube bundle heat exchanger

Publications (1)

Publication Number Publication Date
EP1491836A1 true EP1491836A1 (en) 2004-12-29

Family

ID=33395892

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20030014714 Withdrawn EP1491836A1 (en) 2003-06-27 2003-06-27 Falling film tube bundle heat exchanger

Country Status (2)

Country Link
EP (1) EP1491836A1 (zh)
CN (1) CN100362304C (zh)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITMI20090768A1 (it) * 2009-05-06 2010-11-07 Saipem Spa Apparecchiatura a fascio tubiero con elementi regolatori del flusso liquido
WO2011020732A3 (en) * 2009-08-17 2011-05-12 Dsm Ip Assets B.V. An apparatus for the decomposition of non-converted ammonium carbamate in urea solutions in a urea synthesis process
CN105102876A (zh) * 2013-04-08 2015-11-25 株式会社神户制钢所 低温液化气的气化装置
CN110906760A (zh) * 2019-12-06 2020-03-24 中冶焦耐(大连)工程技术有限公司 一种双管板双管层沥青降膜冷却器及其冷却系统与工艺

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103787437B (zh) * 2014-02-19 2015-07-22 陈达人 幕帘式蒸发器

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE899795C (de) * 1949-06-08 1953-12-17 Hoechst Ag Vorrichtung zum Waermeaustausch
DE909942C (de) * 1942-03-12 1954-04-26 Hoechst Ag Fluessigkeitsverteiler zur Berieselung senkrechter, in einem Rohrboden befestigter Rohre
US3016067A (en) * 1960-08-11 1962-01-09 Henry Vogt Machine Company Liquid distributing device
FR2256778A1 (en) * 1974-01-03 1975-08-01 Sun Ventures Inc Elimination of tubular hot-spots in heat exchange reactors - by dividing outer casing into individually temp.-controlled compartments
DE3639303A1 (de) * 1986-05-20 1987-11-26 Leipzig Chemieanlagen Rohrbuendelapparate

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE909942C (de) * 1942-03-12 1954-04-26 Hoechst Ag Fluessigkeitsverteiler zur Berieselung senkrechter, in einem Rohrboden befestigter Rohre
DE899795C (de) * 1949-06-08 1953-12-17 Hoechst Ag Vorrichtung zum Waermeaustausch
US3016067A (en) * 1960-08-11 1962-01-09 Henry Vogt Machine Company Liquid distributing device
FR2256778A1 (en) * 1974-01-03 1975-08-01 Sun Ventures Inc Elimination of tubular hot-spots in heat exchange reactors - by dividing outer casing into individually temp.-controlled compartments
DE3639303A1 (de) * 1986-05-20 1987-11-26 Leipzig Chemieanlagen Rohrbuendelapparate

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9068781B2 (en) 2009-05-06 2015-06-30 Saipem S.P.A. Tube bundle equipment with liquid flow regulator elements
WO2010128371A3 (en) * 2009-05-06 2011-01-20 Saipem S.P.A. Tube bundle equipment with liquid flow regulator elements
CN102460053A (zh) * 2009-05-06 2012-05-16 塞彭公司 具有液体流量调节元件的管束设备
JP2012526259A (ja) * 2009-05-06 2012-10-25 サイペム・ソシエタ・ペル・アチオニ 液体流れの調節要素を備えた管束設備
ITMI20090768A1 (it) * 2009-05-06 2010-11-07 Saipem Spa Apparecchiatura a fascio tubiero con elementi regolatori del flusso liquido
CN106403651A (zh) * 2009-05-06 2017-02-15 塞彭公司 具有液体流量调节元件的管束设备
CN106403651B (zh) * 2009-05-06 2019-03-15 塞彭公司 具有液体流量调节元件的管束设备
WO2011020732A3 (en) * 2009-08-17 2011-05-12 Dsm Ip Assets B.V. An apparatus for the decomposition of non-converted ammonium carbamate in urea solutions in a urea synthesis process
US9061972B2 (en) 2009-08-17 2015-06-23 Stamicarbon, B.V. Apparatus for the decomposition of non-converted ammonium carbamate in urea solutions in a urea synthesis process
EA022597B1 (ru) * 2009-08-17 2016-01-29 Стамикарбон Б.В. Аппарат для разложения карбамата аммония и способ изготовления аппарата для разложения карбамата аммония
CN105102876A (zh) * 2013-04-08 2015-11-25 株式会社神户制钢所 低温液化气的气化装置
CN110906760A (zh) * 2019-12-06 2020-03-24 中冶焦耐(大连)工程技术有限公司 一种双管板双管层沥青降膜冷却器及其冷却系统与工艺
CN110906760B (zh) * 2019-12-06 2024-01-16 中冶焦耐(大连)工程技术有限公司 一种双管板双管层沥青降膜冷却器及其冷却系统与工艺

Also Published As

Publication number Publication date
CN1576766A (zh) 2005-02-09
CN100362304C (zh) 2008-01-16

Similar Documents

Publication Publication Date Title
US9528772B2 (en) Multi-passage thermal sheet and heat exchanger equipped therewith
US7111673B2 (en) System for stripping and rectifying a fluid mixture
RU2007125987A (ru) Устройство с реакторными трубами
EP1048915B1 (en) Heat exchanger
CN1043848C (zh) 蒸发装置和方法
EP1491836A1 (en) Falling film tube bundle heat exchanger
CN102844101B (zh) 具有板式热交换器的化学反应器
EP1378282A1 (en) Distillation apparatus
EP1376040A1 (en) Multiservice heat exchange unit
CN103153419A (zh) 降膜式蒸发器
CA2474061A1 (en) Heat integrated distillation column
RU2282121C1 (ru) Вертикальный пленочный теплообменник
US5927388A (en) Condenser for binary/polynary condensation
CN213220999U (zh) 精馏塔用冷凝结构
EP1469269A1 (en) Method to increase the potential of a falling film tube bundle heat exchanger
US20230074304A1 (en) Vapor distribution system in a concentric reboiler
EP1340527B1 (en) Evaporator with heat surface formed by an open, descending channel in the shape of a concentric spiral
ZA200309459B (en) Pump for transporting a heat exchange medium for a multi tube reactor
RU2004127847A (ru) Способ и аппарат для конденсации карбамата
JP4966655B2 (ja) 多重構造型内部熱交換型蒸留塔
CN109458853A (zh) 一种带有u型气液分离结构的冷凝换热器
JP4496958B2 (ja) 内部熱交換型蒸留塔
JPH04292789A (ja) 熱交換器
EP1279915A1 (en) Heat exchange unit, in particular for isothermal reactors
RU2667286C1 (ru) Ректификационная колонна и способ очистки спирта с ее применением

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL LT LV MK

17P Request for examination filed

Effective date: 20050223

AKX Designation fees paid

Designated state(s): DE IT NL

17Q First examination report despatched

Effective date: 20061205

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN

18W Application withdrawn

Effective date: 20081003