EP0644394A1 - Echangeur de chaleur - Google Patents

Echangeur de chaleur Download PDF

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Publication number
EP0644394A1
EP0644394A1 EP93115210A EP93115210A EP0644394A1 EP 0644394 A1 EP0644394 A1 EP 0644394A1 EP 93115210 A EP93115210 A EP 93115210A EP 93115210 A EP93115210 A EP 93115210A EP 0644394 A1 EP0644394 A1 EP 0644394A1
Authority
EP
European Patent Office
Prior art keywords
jacket
heat exchanger
partition
tubes
heat
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Withdrawn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
EP93115210A
Other languages
German (de)
English (en)
Inventor
Vladimir Surenovich Stepanyants
Alexandr Petrovich Vainer
Sergei Grigorievich Rogachev
Alexandr Antonovich Brodovich
Nikolai Pavlovich Zamidra
Eduard Vasilievich Shabanov
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.)
PROIZVODSTVENNOE OBIEDINENIE "CHERNOVITSKY MASHINOSTROITELNY ZAVOD"
Original Assignee
PROIZVODSTVENNOE OBIEDINENIE "CHERNOVITSKY MASHINOSTROITELNY ZAVOD"
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 PROIZVODSTVENNOE OBIEDINENIE "CHERNOVITSKY MASHINOSTROITELNY ZAVOD" filed Critical PROIZVODSTVENNOE OBIEDINENIE "CHERNOVITSKY MASHINOSTROITELNY ZAVOD"
Priority to EP93115210A priority Critical patent/EP0644394A1/fr
Publication of EP0644394A1 publication Critical patent/EP0644394A1/fr
Withdrawn legal-status Critical Current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
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/22—Arrangements for directing heat-exchange media into successive compartments, e.g. arrangements of guide plates

Definitions

  • the invention relates to heat exchange apparatuses in which the heat carriers do not come into direct contact with one another, in particular it relates to a heat exchanger.
  • the present invention can be most effectively applied to the petroleum, petrochemical, chemical, petroleum, gas, energy, and other industries.
  • a heat exchanger is known (Spravochnik po teploobmennikam (Handbook for heat exchangers) vol. 1, 1987, p. 38), which includes a jacket in which a bundle of tubes with transverse partition walls is attached to tube sheets, which are spaced apart from one another over the length of the jacket .
  • a collecting chamber is connected to one of the end faces of the jacket and is divided into an entry and an exit section by a longitudinal partition.
  • the jacket is provided with sockets for the introduction and removal of heat transfer media.
  • the tube bundle is either with a floating head or with -shaped heat exchange tubes connected.
  • a major disadvantage of this heat exchanger is that its counterflow index is 0.5 (the largest possible value is 1), which is why it is related to the tube bundle is two-course and in relation to the pipe gap.
  • Another heat exchanger (SU, A, 1451518) is known, which contains a jacket with a bundle of heat exchange tubes fastened in tube sheets and with connecting pieces for inserting and removing a heat transfer medium, between which there is a longitudinal partition. A series of transverse partition walls is arranged in the space between the tubes. A collection chamber is connected to one of the end faces of the jacket and is divided into an inlet and an outlet section by a longitudinal partition wall and is provided with corresponding connections for the introduction and removal of another heat transfer medium.
  • the heat exchanger contains a means for hermetically sealing the partition wall to the casing, which is in the form of lock connections.
  • Each lock connection comprises a tubular socket, which on the one hand is rigidly connected to the inner surface of the casing, but on the other hand has a longitudinal slot, and a reinforcement on the lateral section of the longitudinal partition wall adjoining the casing, which reinforcement is accommodated in the socket.
  • each lock connection is made of a thermoelastic material.
  • a device for ejecting the longitudinal partition wall from the sockets when the heat exchanger is disassembled is mounted in front of the sockets.
  • the tube bundle is connected to a floating head, which includes a tube sheet with a lid.
  • a major disadvantage of the design of the heat exchanger is the need to provide corresponding recesses in the tube sheet distant from the collecting chamber, in order to allow it to pass the sockets and the ejection device when the heat exchanger is disassembled. This complicates the design of the heat exchanger and reduces the tightness of the tube sheet with the cover of the floating head.
  • Another disadvantage of the design of the heat exchanger is the fact that due to the arrangement of the longitudinal partition wall in the tube bundle and the increase in the counterflow index to one, mechanical stresses in the rolled connections of the tube sheets increase due to different thermal expansion of the tubes in the bundle. This reduces the reliability of the design of the heat exchanger.
  • the disadvantage of the design of the heat exchanger is the creation of "parasitic” heat flows through the longitudinal partition due to a temperature gradient of the heat transfer medium on different sides of the longitudinal partition.
  • the presence of "parasitic” heat flows reduces the heat effectiveness of the heat exchanger.
  • the present invention has for its object to provide a heat exchanger in which the means for hermetically sealing the partition to the jacket would have a construction which would allow the construction of the heat exchanger as a whole to ensure reliable hermeticization in the connection zone of the Simplify the longitudinal partition and the jacket.
  • the object is achieved in that in the heat exchanger, containing a jacket with a bundle of heat exchange tubes and with sockets for introducing and removing a heat transfer medium, between which there is a longitudinal partition, a collecting chamber which is connected to one of the end faces of the jacket and with sockets for Inserting and removing another heat transfer medium is provided, and a means for hermetically sealing the partition wall to the jacket, according to the invention the means for hermetically sealing the partition wall to the jacket is in the form of packages of elastic bands, which is at least on one of the sides the longitudinal dividing wall are fixed symmetrically over their length in the sections adjacent to the inner surface of the casing, a part of each band projecting beyond the boundaries of the dividing wall and making contact with the inner surface of the casing.
  • the proposed construction of the means for hermetically sealing the partition and the jacket offers the possibility of creating a "labyrinth seal" in the connecting zone of the partition and the jacket, which increases the reliability of the hermeticization in this zone and simplifies the construction of the heat exchanger as a whole .
  • Such a construction of the agent eliminates the need to make cutouts in the tube sheet and simplifies the assembly and disassembly of the heat exchanger.
  • a number of transverse partition walls are arranged in the jacket, which are spaced apart from one another over the length of the tubes and each of which consists of bars which are located between the tubes and are fastened in a half ring attached to the longitudinal partition.
  • This design variant contributes to increasing the turbulence of the flow, which is necessary to intensify the heat exchanger.
  • the presence of the half rings reduces the gap between the tube bundle and the jacket, which leads to a reduction in the heat losses due to a transition into the environment via the jacket.
  • the use of the transversal bottoms makes it possible to rule out the occurrence of standstill zones in the heat exchanger and makes it easier for the latter to be cleared of deposits.
  • a support partition is arranged in the tube bundle, which is located outside the boundaries of the longitudinal partition at the end of the jacket remote from the collecting chamber.
  • Such an embodiment variant of the invention makes it possible to increase the rigidity of the tube bundle and, as a result, to increase the operational reliability of the heat exchanger.
  • the strips in each package have a different width, which increases in the direction from the longitudinal partition wall to the tubes.
  • Such an embodiment variant of the invention makes it possible to practically exclude the formation of "parasitic" heat flows through the longitudinal partition wall, which in turn can increase the heat effectiveness of the heat exchanger.
  • the strips in each package are made from bimetal.
  • guides for tape packs are provided, each of which is arranged at the end of the longitudinal partition wall remote from the collecting chamber between the latter and one of the tape packs.
  • This embodiment of the invention makes it considerably easier to assemble the heat exchanger.
  • At least some of the tubes have a cord.
  • Such a design of the pipes makes them more plastic.
  • Such pipes have a higher reliability than the conventional ones because they reduce mechanical stresses in the rolled connections of the tube sheet and the tubes.
  • the heat exchanger contains a jacket 1 (Fig. 1), in the interior of which there is a bundle of heat exchange tubes 2, which are fastened in tube sheets 3, 31.
  • the jacket 1 On one end face, the jacket 1 is provided with a collecting chamber 4 with a longitudinal partition 5, which is located between connecting pieces 6, 7 for the introduction and removal of a heat transfer medium.
  • the bundle of tubes 2 On the other end of the jacket 1, the bundle of tubes 2 is equipped with a floating head 8 with a cover (not shown).
  • a longitudinal partition 9 is arranged in the bundle of tubes 2, which is attached to the tube sheet 3, which is located between the collecting chamber 4 and the jacket 1.
  • the partition 9 is arranged between the connecting pieces 10, 11 for the insertion and removal of another heat transfer medium.
  • At least a part of the partition 9, which adjoins the collecting chamber 4, has thermal insulation in the form of intermediate layers 12 made of heat-insulating material (e.g. fiberglass, paranite, paralon), which are arranged on both sides of the partition. It is preferred that the length of the intermediate layers 12 (FIG. 3) is at least 67% of the length of the partition 9.
  • intermediate layers 12 made of heat-insulating material (e.g. fiberglass, paranite, paralon)
  • the optimal solution is a ratio that corresponds to the "golden ratio", i.e. 37.0 and 63.0%, of which the inventors are guided, but as a reserve variant, they suggest isolating the longitudinal plate over 25% of its length, but preferably 63%.
  • the intermediate layers 12 are protected by sheets 13.
  • the heat exchanger is provided with a means 14 for hermetically sealing the partition 9 and the casing 1, which is in the form of packages 15 (Fig. 2-4) elastic bands 16, which at least on one of the sides of the partition 9 above it Length in sections adjacent to the inner surface of the jacket 1 are attached symmetrically. A part of each band 16 protrudes beyond the boundaries of the partition 9 and contacts the inner surface of the jacket 1, whereby a labyrinth seal (Fig. 2, 4) is formed. I n each packet 15 have the strips 16 have a different width in the direction of the partition wall 9 to the tubes 2 (Fig. 3) increases toward.
  • the packages 15 are fastened to the partition 9 by means of bolts 17 with inserts 18.
  • the straps 16 in each package 15 can be made with shape memory or bimetal.
  • the packets 15 of the belts 16 are equipped with guides 19 (FIG. 4) which are arranged on the end of the partition 9 closest to the floating head 8. Each guide 19 is located between the respective package 15 of the belts 16 and the partition 9.
  • transverse partition walls 20 (FIGS. 1, 2) which are spaced apart from one another over the length of the tubes 2 and each of which consists of rods 21 which are located between the tubes 2 and in one the partition 9 attached half ring 22 are attached.
  • a support partition 23 is arranged in the bundle of tubes 2 and is located outside the boundaries of the partition 9.
  • Each tube 2 has a cord 24 (Fig. 5).
  • the bundle prepared in this way is inserted into the jacket 1.
  • the bundle of tubes 2 is hermetically sealed on one end by the cover of the floating head 8, while on the other end the jacket 1 is hermetically sealed to the collecting chamber 4.
  • connections 6, 7, 10, 11 are connected by means of pipes (not shown) for supplying and removing the heat transfer medium.
  • the heat exchanger according to the invention works as follows.
  • the heat transfer streams enter the heat exchanger in counterflow.
  • One of the streams passes through the nozzle 6 of the collecting chamber 4 into the tubes 2 and then into the floating head 8, after which it reaches the chamber 4 again via the heat exchange tubes 2 and leaves the heat exchanger through the nozzle 7.
  • the other stream enters the nozzle 10 and reaches the pipe gap by running around the heat-insulated longitudinal partition 9, the stream being swirled by the partition walls 20 and, after accepting the heat from the first stream, from the jacket 1 through the Port 11 emerges.
  • the invention can be used in the petroleum, petrochemical, chemical, petroleum, gas, and other industries.

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)
EP93115210A 1993-09-21 1993-09-21 Echangeur de chaleur Withdrawn EP0644394A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP93115210A EP0644394A1 (fr) 1993-09-21 1993-09-21 Echangeur de chaleur

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP93115210A EP0644394A1 (fr) 1993-09-21 1993-09-21 Echangeur de chaleur

Publications (1)

Publication Number Publication Date
EP0644394A1 true EP0644394A1 (fr) 1995-03-22

Family

ID=8213286

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93115210A Withdrawn EP0644394A1 (fr) 1993-09-21 1993-09-21 Echangeur de chaleur

Country Status (1)

Country Link
EP (1) EP0644394A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1012029C2 (nl) * 1999-05-11 2000-11-14 Bloksma B V Warmtewisselaar.

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1803035A (en) * 1930-06-30 1931-04-28 Westinghouse Electric & Mfg Co Heat exchanger
US2404187A (en) * 1943-08-27 1946-07-16 Woodall Duckham 1920 Ltd Tubular heat exchange apparatus
EP0259895A1 (fr) * 1983-03-28 1988-03-16 Tui Industries Echangeur de chaleur tubulaire
EP0382098A2 (fr) * 1989-02-10 1990-08-16 Mitsubishi Jukogyo Kabushiki Kaisha Dispositif de transfert de chaleur du type à multitube

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1803035A (en) * 1930-06-30 1931-04-28 Westinghouse Electric & Mfg Co Heat exchanger
US2404187A (en) * 1943-08-27 1946-07-16 Woodall Duckham 1920 Ltd Tubular heat exchange apparatus
EP0259895A1 (fr) * 1983-03-28 1988-03-16 Tui Industries Echangeur de chaleur tubulaire
EP0382098A2 (fr) * 1989-02-10 1990-08-16 Mitsubishi Jukogyo Kabushiki Kaisha Dispositif de transfert de chaleur du type à multitube

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1012029C2 (nl) * 1999-05-11 2000-11-14 Bloksma B V Warmtewisselaar.
WO2000068629A1 (fr) * 1999-05-11 2000-11-16 Bloksma B.V. Echangeur de chaleur

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