EP2508834A2 - Échangeur de chaleur - Google Patents

Échangeur de chaleur Download PDF

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Publication number
EP2508834A2
EP2508834A2 EP11460027A EP11460027A EP2508834A2 EP 2508834 A2 EP2508834 A2 EP 2508834A2 EP 11460027 A EP11460027 A EP 11460027A EP 11460027 A EP11460027 A EP 11460027A EP 2508834 A2 EP2508834 A2 EP 2508834A2
Authority
EP
European Patent Office
Prior art keywords
heat exchanger
outer jacket
diameter
pipe elements
baffles
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Withdrawn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
EP11460027A
Other languages
German (de)
English (en)
Other versions
EP2508834A3 (fr
Inventor
Adam Pacholski
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.)
AIC SA
Original Assignee
AIC 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 AIC SA filed Critical AIC SA
Publication of EP2508834A2 publication Critical patent/EP2508834A2/fr
Publication of EP2508834A3 publication Critical patent/EP2508834A3/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Withdrawn legal-status Critical Current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
    • 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
    • F28D7/16—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 in parallel spaced relation
    • F28D7/1607—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 in parallel spaced relation with particular pattern of flow of the heat exchange media, e.g. change of flow direction
    • 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
    • F28D7/16—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 in parallel spaced relation
    • F28D7/1684—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 in parallel spaced relation the conduits having a non-circular cross-section
    • F28D7/1692—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 in parallel spaced relation the conduits having a non-circular cross-section with particular pattern of flow of the heat exchange media, e.g. change of flow direction
    • 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
    • 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
    • F28F2009/222—Particular guide plates, baffles or deflectors, e.g. having particular orientation relative to an elongated casing or conduit
    • F28F2009/226—Transversal partitions
    • 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
    • F28F2009/222—Particular guide plates, baffles or deflectors, e.g. having particular orientation relative to an elongated casing or conduit
    • F28F2009/228—Oblique partitions

Definitions

  • the invention concerns a heat exchanger of the pipe exchanger group, designed for exchanging heat between gas and liquid. It is applied in heat engineering, particularly in domestic central heating installations.
  • pipe heat exchangers There are many known types of pipe heat exchangers. Their structure depends on the place of their application, the circulating agent used, and the specific demands and needs. All pipe heat exchangers of the liquid-gas type share a common feature, namely they all have a system of pipe elements transferring hot gas or liquid, fitted in between two sieve walls of a chamber enclosed in an outer jacket, where the heated water or gas circulates.
  • heat exchangers are provided with a combustion chamber mounted above the upper sieve wall, and have water inlet and outlet pipe stubs, a gas inlet pipe stub, and a gas exhaust pipe stub. In such exchangers the pipe sets are positioned vertically.
  • heat exchangers used in heat engineering composed of a number of pipe sets installed in a chamber enclosed in an outer jacket.
  • the pipes are fitted in between the perforated bottom, with the water chamber underneath, from where the water is transferred into the pipes to serve as a cooling agent for the steam coming out of the turbine outlets and transferred to the chamber where the pipes are installed.
  • the pipe elements used in the piping systems differ in their diameters and shapes, and may be equipped with different auxiliary elements, such as baffles or additional pipes etc., so as to enhance efficiency of the heat exchange.
  • the heat exchanger known from the patent application published under No. W02008/131616 consists of a cylindrical jacket with inlet and outlet pipe stubs, enclosing a set of pipe elements, where the pipes go through a spiral baffle and are connected to sieve walls shaped into flat discs fitting the cylindrical outer jacket.
  • tie rods are installed, one of which runs along the central axis of the cylindrical outer jacket.
  • the tie rods are anchored in the sieve wall on the one end, and in the spiral baffle on the other. They are divided into segments and equipped with distance pipes.
  • the described exchanger may also feature additional pipes running through the spiral baffle, though not anchored in the sieve walls, to improve the rigidity, protect against deformations, and facilitate matching the openings in the spiral baffle to the exchanger pipes.
  • additional pipes running through the spiral baffle though not anchored in the sieve walls, to improve the rigidity, protect against deformations, and facilitate matching the openings in the spiral baffle to the exchanger pipes.
  • the specification discloses the structure of the spiral baffle in detail.
  • a boiler comprising a cylindrical casing, vertically positioned liquid-gas exchanger, burner installed in the combustion chamber of the exchanger, inlet and outlet of the heated water, fume exhaust duct, gas inlet, fittings which supply the air and appropriately mix it with the gas, as well as control devices.
  • This embodiment of the heat exchanger contains a set of pipe elements rectangular in cross section, regularly distributed between the walls of the outer jacket forming the chamber, through which the heated water flows. The top ends of the pipes are anchored in the flat upper sieve wall under the combustion chamber. The pipes, piercing through the flat bottom sieve wall and crossing the exhaust gas recirculation chamber, are linked with the fume exhaust duct.
  • the water chamber is fitted with flat disc-shaped baffles, through which the pipe elements run.
  • These separating baffles disturb water circulation and thus improve heat exchange. They are positioned perpendicular to the pipe elements, and their diameter is smaller than the inner diameter of the heat exchanger jacket to leave some space between the baffles and the jacket for the water to flow.
  • the said specification discusses the correlation between the width of this space and water circulation, as well as the pressure of the water on the baffles.
  • the structural variant of the embodiment described in the application envisages leaving some space between the pipe element walls and the openings in the baffles, through which the pipes run to increase water circulation disturbance and improve heat exchange efficiency.
  • the described boiler is equipped with an auxiliary independent water circuit consisting of spiral pipes installed in the water chamber and coiled around the combustion chamber.
  • the heat exchanger comprising an outer jacket, which encases a set of vertically running pipe elements anchored in sieve walls on both ends, a gas combustion chamber positioned over the upper sieve wall, and baffles mounted crosswise to the pipe elements, with openings through which the pipe elements run, plus water, gas, and fume inlet and outlet pipe stubs, is characterised in that the outer jacket is conical in shape gaining in diameter towards the top, and the top baffle below the upper sieve wall is conical in shape, its apex pointing down.
  • the top baffle has a central opening in the middle and its outer diameter corresponds with the diameter of the outer jacket.
  • the flare angle of the conically shaped top baffle falls within the range of 90° ⁇ ⁇ ⁇ 180°.
  • the outer diameters of the subsequent baffles are, interchangeably, equal to or smaller than the diameter of the outer jacket, where the baffles of the diameter equal to that of the outer jacket have a centrally located opening.
  • the top baffle of the exchanger is additionally perforated with regularly distributed openings.
  • the advantage of the solution according to the invention consists in substantially increased effectiveness of the heat exchange processes, both along the whole length of the exchanger pipe elements, and in the area of the upper sieve wall and the combustion chamber.
  • fig. 1 presents the interior of the heat exchanger
  • fig. 2 visualises the exchanger in the longitudinal section.
  • the heat exchanger consists of a vertically positioned set of pipe elements 1 rectangular in cross-section and arranged spokewise, whose ends are welded to the upper sieve wall 2 at the top and the bottom sieve wall 3 at the bottom. Above the upper sieve wall 2 is the cylindrical steel-sheet combustion chamber 4 permanently welded to the said wall. Fitted perpendicular to the pipe element set are three horizontally positioned baffles 5, 6, and 7 made of steel sheets. Baffles 5, 6, and 7 have a number of openings, the diameters of which correspond with the diameters of the pipe elements 1 running through them.
  • the top baffle 5 is conical in shape, its apex pointing down.
  • the cone flare angle ⁇ is approximately 130°.
  • the central baffle 6 and bottom baffle 7 are shaped into flat discs.
  • a large, centrally positioned opening 8 is cut in each of the top 5 and bottom 7 baffles.
  • the set of the pipe elements 1, the sieve walls 2 and 3, the baffles 5, 6, and 7, and the cylinder of the combustion chamber 4, are encased in the outer jacket 9 shaped into a truncated cone gaining in diameter towards the top.
  • the outer diameters of top baffle 5 and bottom baffle 7 correspond with the inner diameters of the outer jacket 9, whereas the diameter of the central baffle 6 is smaller than the inner diameter of the outer jacket 9 at the said baffle level.
  • the exchanger is closed from the top with a cover 10 fitted with a gas inlet pipe stub, an opening for the burner with its ventilation valve system, and other mounting elements necessary for the installation of the equipment and the boiler casing, which houses the described heat exchanger.
  • the bottom sieve wall 3 is permanently welded to the outer jacket at their contact point.
  • the cover 10 is severably connected to the outer jacket 9 and the combustion chamber 4 with bolts.
  • Water inlet 11 and water outlet 12 stub pipes are installed respectively in the top and bottom section of the outer jacket 9, and the bottom tank 13 formed under the bottom sieve wall is fitted with condensate drain pipe stub 14 and gas fume exhaust pipe stub 15.
  • the top baffle 5 has a number of additional openings 16 regularly arranged in a circle in between the pipe element set 1.
  • the heat exchanger is designed for burning natural gas and propane and thus obtain heat used to heat the water circulating in the central heating installation.
  • the gas burns in the combustion chamber 4 in the top section of the exchanger, then the fumes flow down through vertical pipe elements 1 passing heat on their way to the water circulating inside the outer jacket 9, between the water inlet 11 and the water outlet 12.
  • the fumes cool down below the dewpoint temperature and accumulate in the bottom container 13, from where they are drained off together with the accumulated condensate through the condensate drain pipe stub 14 and the gas fume exhaust 15.
  • the heated water circulates outside and around the pipe elements 1, in the direction opposite to the flow of the fumes, i.e.
  • the water is introduced through the water inlet pipe stub 11 at the bottom of the exchanger and flows upwards around the pipe elements 1 and the combustion chamber 4, whereupon it is removed from the heat exchanger through the water outlet pipe stub 12 in the upper section of the exchanger.
  • the desired water flow around the pipe elements 1 and the combustion chamber 4 is forced by the set of baffles, where the flow is directed through the central opening 8 in the bottom baffle 7 to the central section of the exchanger, then towards the walls of the outer jacket 9, around the outer edges of the central baffle 6, and then again towards the centre, from where the stream of water is directed through the central opening 8 in the top baffle 5 to the central point of the top sieve wall 2, thanks to which the flow of water around the said wall and the combustion chamber 4 is even in all directions.
  • the water lingering in the dead zones under the top baffle 5 flows through the additional openings 16, which perforate the baffle.
  • the heat exchanger contains 20 pipe elements, its height is ⁇ 600 mm, top diameter ⁇ 350 mm, bottom diameter ⁇ 300 mm, and the diameter of the combustion chamber is ⁇ 300 mm too.
  • the maximum temperature guaranteed at the outlet is ⁇ 90 0 C.
  • the heat exchanger may have a conically-shaped top sieve wall, a conical bottom sieve wall, and a conical baffle, and different numbers of the other baffles subsequently alternating in outer diameters, every other baffle having a large, centrally-located opening.
  • the cone shape of the bottom sieve wall is identical to the conical shape of top sieve wall, though other embodiments of the exchanger are possible, where their cone flare angles may differ, or the top and bottom sieve walls may be flat, or given any other shape.
  • the pipe elements of the exchanger may also differ in their cross-sections and arrangement.
  • the shape of the top baffle 5, as well as the interchangeably varying outer diameters of the baffles and the corresponding large central openings 8 in the baffles force the preferable water flow in the exchanger, which increases heat exchange efficiency. Pertaining particularly to increased heat exchange efficiency in the area of the combustion chamber is the higher speed flow of the liquid washing around the combustion chamber due to the new shape of the top baffle.
  • the additional openings 16 in the top baffle 5 prevent the formation of the so-called dead zones under the baffle, where the water tends to come to a standstill, by permitting its controlled flow, that is the seeping of the fluid between the zones under and over the baffle at specific points.

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)
  • Instantaneous Water Boilers, Portable Hot-Water Supply Apparatuses, And Control Of Portable Hot-Water Supply Apparatuses (AREA)
EP11460027.3A 2011-04-07 2011-05-19 Échangeur de chaleur Withdrawn EP2508834A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PL394478A PL219104B1 (pl) 2011-04-07 2011-04-07 Wymiennik ciepła

Publications (2)

Publication Number Publication Date
EP2508834A2 true EP2508834A2 (fr) 2012-10-10
EP2508834A3 EP2508834A3 (fr) 2014-04-09

Family

ID=45747125

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11460027.3A Withdrawn EP2508834A3 (fr) 2011-04-07 2011-05-19 Échangeur de chaleur

Country Status (2)

Country Link
EP (1) EP2508834A3 (fr)
PL (1) PL219104B1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017171276A1 (fr) * 2016-03-28 2017-10-05 주식회사 경동나비엔 Échangeur de chaleur tubulaire
KR20190074647A (ko) * 2017-12-20 2019-06-28 주식회사 경동나비엔 관체형의 열교환기
WO2019132323A1 (fr) 2017-12-29 2019-07-04 주식회사 경동나비엔 Chaudière à tubes de fumée
WO2019132324A1 (fr) 2017-12-29 2019-07-04 주식회사 경동나비엔 Chaudière à tube de fumée
US11306943B2 (en) 2016-09-09 2022-04-19 Kyungdong Navien Co., Ltd. Tube assembly for tubular heat exchanger, and tubular heat exchanger comprising same

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105805938B (zh) * 2016-04-28 2018-11-20 句容市恒盛电子水表厂 一种缓冲式锅炉
EP4345408A1 (fr) 2022-09-30 2024-04-03 AIC Spólka Akcyjna Ensemble tube d'échangeur de chaleur

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
PL186723B1 (pl) 1998-07-03 2004-02-27 Marczewski Boguslaw Rurowy wymiennik ciepła ciecz-gaz
WO2008131616A1 (fr) 2007-04-26 2008-11-06 Dalian Haite Oil Refining Tech Echangeur thermique résistant aux courts-circuits et muni de déflecteurs hélicoïdaux
WO2009078577A1 (fr) 2007-12-14 2009-06-25 Kyungdong Navien Co., Ltd. Chaudière permettant d'améliorer la propriété d'échange de chaleur

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2002360970A1 (en) * 2002-12-12 2004-06-30 Man Dwe Gmbh Shell-and-tube type reactor for catalytic gas phase reactions
EP1996892A2 (fr) * 2005-10-26 2008-12-03 Behr GmbH & Co. KG Echangeur de chaleur et procede de fabrication d'un echangeur de chaleur
PL216290B1 (pl) * 2010-10-01 2014-03-31 Aic Społka Akcyjna Wymiennik ciepła

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
PL186723B1 (pl) 1998-07-03 2004-02-27 Marczewski Boguslaw Rurowy wymiennik ciepła ciecz-gaz
WO2008131616A1 (fr) 2007-04-26 2008-11-06 Dalian Haite Oil Refining Tech Echangeur thermique résistant aux courts-circuits et muni de déflecteurs hélicoïdaux
WO2009078577A1 (fr) 2007-12-14 2009-06-25 Kyungdong Navien Co., Ltd. Chaudière permettant d'améliorer la propriété d'échange de chaleur

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017171276A1 (fr) * 2016-03-28 2017-10-05 주식회사 경동나비엔 Échangeur de chaleur tubulaire
CN108885026A (zh) * 2016-03-28 2018-11-23 庆东纳碧安株式会社 管体型热交换器
JP2019510952A (ja) * 2016-03-28 2019-04-18 キュンドン ナビエン シーオー．，エルティーディー． チューブ型熱交換器
EP3438562A4 (fr) * 2016-03-28 2019-11-27 Kyungdong Navien Co., Ltd. Échangeur de chaleur tubulaire
RU2717176C1 (ru) * 2016-03-28 2020-03-18 Киунгдонг Навиен Ко., Лтд. Трубчатый теплообменник
US10935278B2 (en) 2016-03-28 2021-03-02 Kyungdong Navien Co., Ltd. Tubular heat exchanger
US11306943B2 (en) 2016-09-09 2022-04-19 Kyungdong Navien Co., Ltd. Tube assembly for tubular heat exchanger, and tubular heat exchanger comprising same
KR20190074647A (ko) * 2017-12-20 2019-06-28 주식회사 경동나비엔 관체형의 열교환기
WO2019132323A1 (fr) 2017-12-29 2019-07-04 주식회사 경동나비엔 Chaudière à tubes de fumée
WO2019132324A1 (fr) 2017-12-29 2019-07-04 주식회사 경동나비엔 Chaudière à tube de fumée

Also Published As

Publication number Publication date
PL394478A1 (pl) 2012-10-08
EP2508834A3 (fr) 2014-04-09
PL219104B1 (pl) 2015-03-31

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