WO1986002718A1 - Echangeur thermique a ecoulement transversal - Google Patents

Echangeur thermique a ecoulement transversal Download PDF

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Publication number
WO1986002718A1
WO1986002718A1 PCT/JP1984/000528 JP8400528W WO8602718A1 WO 1986002718 A1 WO1986002718 A1 WO 1986002718A1 JP 8400528 W JP8400528 W JP 8400528W WO 8602718 A1 WO8602718 A1 WO 8602718A1
Authority
WO
WIPO (PCT)
Prior art keywords
heat transfer
transfer element
heat exchanger
gas
grooves
Prior art date
Application number
PCT/JP1984/000528
Other languages
English (en)
Japanese (ja)
Inventor
Yoshinori Toudoh
Masahito Honda
Fumio Shimoda
Shuzo Hara
Original Assignee
Mitsubishi Jukogyo Kabushiki Kaisha
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 Mitsubishi Jukogyo Kabushiki Kaisha filed Critical Mitsubishi Jukogyo Kabushiki Kaisha
Priority to PCT/JP1984/000528 priority Critical patent/WO1986002718A1/fr
Priority to DE19843490777 priority patent/DE3490777T1/de
Priority to GB08614552A priority patent/GB2194626A/en
Publication of WO1986002718A1 publication Critical patent/WO1986002718A1/fr
Priority to SE8602928A priority patent/SE8602928L/xx

Links

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
    • F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
    • F28F3/02—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations
    • F28F3/04—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element
    • F28F3/048—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element in the form of ribs integral with the element or local variations in thickness of the element, e.g. grooves, microchannels
    • 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
    • F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D9/0031—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other
    • F28D9/0037—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other the conduits for the other heat-exchange medium also being formed by paired plates touching each other
    • 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
    • F28F21/04—Constructions of heat-exchange apparatus characterised by the selection of particular materials of ceramic; of concrete; of natural stone

Definitions

  • the present invention relates to a cross-flow type heat exchanger that can be favorably used over a wide range from a high temperature region of an exhaust gas to a low temperature region of an exhaust gas having an acid dew point or lower.
  • Fig. 1 shows a schematic structure of a conventional air preheater 40.
  • ⁇ Fig. 1 shows a tube type air preheater. Normally, air flows inside the tube 41, gas flows outside the tube 41 ', or vice versa, in a crosswise or opposing manner to perform heat exchange.
  • the arrows in the figure indicate the flow direction of air or gas.
  • the preheater 40 is a non-leak type in which gas does not leak and mix between heat exchange fluids, but has a disadvantage that the heat transfer area per unit volume is small and the equipment becomes large.
  • the life of the pipe 41 can be extended to some extent by making the material of the pipe 41 low-temperature corrosion resistant (coalten).
  • the temperature of exhaust gas can be reduced to at least about 130'c in order to prevent low-temperature corrosion, and improvement in boiler efficiency has reached a plateau.
  • the present invention has been made to effectively solve the above-mentioned problems of the conventional technology.
  • the purpose of the present invention is to provide a gas containing a large amount of corrosive components from the high temperature region of the exhaust gas.
  • Provide a cross-flow type heat exchanger that can be used well over a wide range from the acid dew point to the low temperature area of exhaust gas and has a large heat transfer area per unit volume, thereby dramatically improving the ripening yield. It is in.
  • the object of the present invention is to
  • the non-leaky heat transfer element shall be resistant to high-temperature corrosion and low-temperature corrosion that can withstand exhaust gas temperatures below the acid dew point.
  • the exhaust gas temperature of the heat exchanger is sufficiently lowered to below the acid dew point to dramatically improve the heat recovery efficiency (improve the boiler efficiency by about 1.5%).
  • the leak type solves the problem of leakage of dust or harmful substances (such as SO x) from the high-pressure fluid side to the low-pressure fluid side (exhaust fluid side).
  • the present invention has a structure in which dust does not easily adhere to the heat transfer surface of the heat transfer element, and has a structure that is easy to clean and wash with water.
  • the heat transfer element should have sufficient compactness, mass production type structure, and durable economical efficiency suitable for large-capacity heat exchangers.
  • the gist of the present invention is that a plurality of fins are arranged on the surface of a ceramic plate.
  • a plurality of grooves are formed between the plurality of fins for allowing a heating fluid or a fluid to be heated to flow therethrough, and a plurality of the ceramic plates are formed in the plurality of fins.
  • the heat transfer element is formed by alternately laminating the heat transfer elements so that the heating fluid flows through one of the two orthogonal groove groups of the heat transfer element.
  • a cross-floor type heat exchanger characterized in that a fluid to be heated is made to flow through the other group of grooves.
  • the cross-flow type heat exchanger according to the present invention is provided with a ceramic for heat transfer (heat exchange) element in order to provide sufficient high corrosion resistance not only to high temperature corrosion but also to low temperature (sulfuric acid etc.) corrosion.
  • a non-cross-type, cross-flow element using a magnetic material for example, alumina
  • the element is a ceramic plate having a rectangular groove that forms a fluid passage. It is formed by laminating and laminating in a sandwich shape so that the paths of the fluid to be heated and the fluid to be heated are alternately orthogonal to each other, and is formed into a large body.
  • the heat exchanger according to the present invention is of a cross flow type, and can easily carry out the separation and introduction of both heat exchange fluids.
  • Another gist of the present invention is that a plurality of fins are integrally formed in parallel on a surface of a ceramic plate, and the plurality of fin phases are formed.
  • a heat transfer element having a rectangular parallelepiped shape is formed by stacking a plurality of the above ceramic plates so that the grooves cross each other at right angles.
  • the heat transfer element block is formed by arranging a plurality of the elements in the support frame in the up-down, left-right, and front-rear directions, and the groove of each of the plurality of heat transfer elements is formed.
  • the direction is matched to one of two directions (X direction, Y direction) that are at right angles to each other, and the direction that is the side of each heat transfer element and that is perpendicular to the plane including the two directions Of the sides extending to the inner side, the inner side is brought into close contact with the side of the adjacent heat transfer element via a packing member, and the outer side is connected to the above-mentioned support frame via a puffing member.
  • a gap is provided so as not to be continuous in two directions, and a packing material is disposed between adjacent heat transfer elements in a direction (Z direction) perpendicular to a plane including the two directions.
  • the heating fluid flows through one of the groove groups, and the fluid to be heated flows through the other groove group. It is located in the Grossov type 1 heat exchanger.
  • the gap between the ceramic heat transfer elements and the connection between the ceramic heat transfer element and the corrosion-resistant metal material should be asperity cross or fine flex. Sealing with a resilient, corrosion-resistant material,
  • a predetermined space (bridging space) is provided between adjacent ceramic heat transfer elements in the direction of the groove. Place and install, adjacent The openings at the ends of the grooves (gas passages) are misaligned with each other, and the area of the openings is reduced, soot accumulates at these openings and the passages To prevent blockage,
  • the cross-flow type heat exchanger according to the present invention can be applied to a land-based air preheater (particularly, a low-temperature section), a gas / gas heater for a desulfurization device, and the like.
  • FIGS. 1 and 2 show the heat transfer elements of the first cross flute type 1 heat exchanger.
  • FIG. 1 shows a ceramic plate 2 as a basic element of the heat transfer element 1 shown in FIG.
  • a large number of fins 3 are integrally formed in parallel on the side surface of the ceramic plate 2 by press roll or extrusion molding, and a heating fluid or a coating is provided between the fins 3.
  • a groove 4 having a rectangular cross section for flowing the heating fluid is formed.
  • the heat transfer element 1 is formed by stacking a plurality of ceramic plates 2 in a sandwich shape such that the grooves 4 are alternately orthogonal to each other. For lamination and bonding of the ceramic plate 2, the ceramic plate 2 is fired.
  • the lamination of the ceramic plate 2 needs to be pressed in the laminating direction so that the outermost fins 3 are completely adhered to the adjacent ceramic plate 2. .
  • the groove 4 of the heat transfer element 1 is composed of two groups of grooves orthogonal to each other, and a heating fluid (gas or high-temperature gas) flows through one of the groups of grooves as shown by arrows in FIG. Then, the fluid to be heated (air or low-temperature gas) flows through the other group of grooves. The two fluids are completely separated by the ceramic plate 2 and do not mix with each other.
  • FIG. 3 is a schematic side view of a cross-flow type heat exchanger using the heat transfer element 1 described above.
  • This heat exchanger is composed of a heat transfer element 1 made of ceramic, a gas inlet duct 5, an outlet duct 6, an air inlet duct 7, and an outlet duct 8.
  • the arrows in the figure indicate the flow directions of gas and air.
  • the gas When a highly contaminated gas (including soot) is used as the heating fluid, the gas should be circulated in the vertical direction, and clean air as the fluid to be heated should be circulated in the horizontal direction. preferable.
  • a highly contaminated gas including soot
  • FIG. 4 shows another embodiment of the heat exchanger according to the present invention, in which the heat transfer element 1 is divided and one of the fluids to be heated is a diffracted flow. According to the example, the heat exchange efficiency is improved, which is more effective.
  • Outlet ducts 14 and 15 are the inlet duct and outlet duct of the air (the fluid to be heated).
  • the heat exchanger according to the present invention can of course be applied to the high temperature region of the exhaust gas, but is highly corrosive, such as the low temperature region below the acid dew point of the exhaust gas (for example, a gas for a low-temperature air preheater, a gas for a desulfurization unit). Can be applied to gas heaters, etc., and in this case, heat exchange can be achieved without causing corrosion of the heat transfer element 1.
  • a large-capacity heat transfer element block is configured by disposing a plurality of the heat transfer elements 1 described above in the support frame 22.
  • FIGS. 5 and 6 show the heat transfer element block 19, which is completed at a factory and assembled on-site with a heat exchanger. . For this reason, the block will be manufactured in a size that can be easily transported and that can be easily assembled on site.
  • the heat transfer element block 19 includes a large number of heat transfer elements 1, a frame 20 for framing the elements 1, a seal member 21, a support frame 22, and the like.
  • the support frame 22 has a structure that can be assembled by stacking or arranging a number of element blocks 19 on site, and is connected to the element block 19 at right angles to each other.
  • Fig. 5 shows the case where the upper and lower gas passages ⁇ -side support frames 22-1 and 22-2 share a common joint flange.
  • the gas connection part to be connected has a structure that can be completely sealed.
  • 1 is a heat transfer element, and a plurality of heat transfer elements 1 are rectangular parallelepipeds formed by the support frames 22-1, 22-2, and 22-3.
  • the heat transfer element block 19 is arranged in the vertical and horizontal directions and the front and rear directions within the frame, and the heat transfer element 1 as a whole is formed as a rectangular parallelepiped assembly, and the support frame 22- 1 to 22-3.
  • the support frame 22-2 is assembled into a quadrilateral on the bottom of the heat transfer element block 19, and forms a flush (meaning the same plane) bottom flange. I have.
  • the support frame 22-1 is assembled in a quadrilateral on the top surface of the heat transfer element block 19, and forms a flat top surface flange.
  • the support frame 22-3 connects the corners ⁇ of the support frames 22-1 and 22-2 to each other, and constitutes a columnar member in the support frame 22.
  • the plurality of heat transfer elements 1 in the support frame 22 are arranged such that the direction of each groove 4 is in one of two directions perpendicular to each other (X direction and Y direction in FIG. 5). They are arranged to match. Specifically, of the two groove groups 23 and 24 of all the heat transfer elements 1 which are orthogonal to each other, heat is transferred so that one groove group 23 is in the vertical direction and the other groove group 24 is in the horizontal direction. Element 1 is provided. For this reason, in FIG. 5, the two groove groups 23 and 24 are perpendicular to each other.
  • the backing member 25 is mainly made of a corrosion-resistant seal backing material such as asbestos cross, fine flex, ceramic, fiber or mortar, water-kneading and heat insulating material. is there.
  • a packing material 26 is provided between the adjacent heat transfer elements 1 in the Z direction.
  • the backing material 26 is made of the same material as the backing member 25,
  • the gaps C,, C 2 are provided between each heat transfer element 1 so that each groove 4 is not continuous with the groove 4 of the adjacent heat transfer element 1 in the X and Y directions. Is provided.
  • the gap C, C 2 is provided between each heat transfer element 1 so that each groove 4 is not continuous with the groove 4 of the adjacent heat transfer element 1 in the X and Y directions. Is provided.
  • the a C 2 are provided are based on the following reasons. In other words, when the ends of the grooves 4 of the heat transfer element 1 are brought into contact with each other, if the ends of the grooves 4 are displaced from each other, the opening area at the ends of the grooves 4 is reduced, and The dust inside may be clogged. Accordingly, need to be provided with a gap C have C 2 is between the heat transfer Ereme down sheet 1 mutually
  • the gap CC 2 is preferably about 20-30 degree «.
  • the support frame 22-1 is made of a channel material, and a seal member 27 is attached to the inner periphery of the support frame 22-1 via the same backing material as described above.
  • the seal member 27 is pressed against the above-mentioned backing member 25 via a backing material.
  • the puffkin member 25 is pressed against the support frame 22-2 via a backing material.
  • the backing member 25 makes direct contact between the heat transfer element 1 and the frame 20 made of a corrosion-resistant material (such as a coal tenn or stainless steel) and the supporting frames 22-1 to 22-3. As a result, the heat transfer element 1 is prevented from being damaged, and the leakage and mixing of the fluid due to the reduced sealing performance of the contact portion of the heat transfer element 1 are prevented.
  • a corrosion-resistant material such as a coal tenn or stainless steel
  • the heat transfer element block 19 is configured as described above.
  • the gas indicated by the arrow is supplied to the inside of the support frame 22-1 on the top surface, and then the other gas flows. All of them pass through the groove group 23 and the gap d without leaking, and then pass through the inside of the support frame 22-2 on the bottom, and are sent out from the heat transfer element block 19.
  • the air indicated by the arrow ⁇ is also the heat transfer element block 19 surrounded by the support frames 22-1, 22-2, and 22-3. through C 2, and is discharged from the side surface of the subsequent opposite. Therefore, in the heat transfer element block 19, the above gas and air
  • the gas and the air may be exchanged with each other and flow, and the flow directions may be reversed.
  • Fig. 7 shows a heat exchanger using the heat transfer element block of the present invention.
  • FIG. 5 is a view showing an example of assembly.
  • This heat exchanger is constructed by assembling and installing a large number of heat transfer element blocks 19 manufactured in the factory on site.
  • 31 is a gas inlet duct
  • 32 is an outlet duct
  • 33 is a gas or air inlet duct
  • 34 is an outlet duct
  • 35 is a steel frame supporting a mature exchanger.
  • Dirty gas containing 10 dust or sulfuric acid mist flows vertically from top to bottom, while air or clean gas flows horizontally.
  • a corrosion-resistant alloy plate such as a stainless steel plate
  • a plate coated with a corrosion-resistant paint is used as a plate of a gas duct or the like that comes into contact with dirty gas containing sulfuric acid.
  • the heat exchanger is constructed by stacking the heat transfer element blocks 19, and the support frames above and below the element blocks 19 It is produced as.
  • the orthogonal gas or air passages are separated from each other, so that a corrosion-resistant seal backing 38 is attached to each common joint flange surface to mount the seal.
  • the ceramic heat transfer element has a plate fin structure with the highest heat transfer efficiency within a unit volume, and is a structure that is less likely to clog the dust, and is a cross-flow type Therefore, heat exchange and separation of both fluids are extremely easy and highly reliable.
  • one fluid flows vertically and the other fluid flows horizontally in the passage in the ceramic element at right angles to perform heat exchange with each other. But each Since the fluids do not leak, it is possible to construct a non-leaky heat exchanger where both fluids do not mix. Therefore, in the case of an air preheater, the air on the high pressure side does not leak, so that the capacity of the blower increases and the power for catching does not increase. Further, in the case of a gas / gas heater for a desulfurization unit, it is possible to prevent a decrease in desulfurization efficiency and dust removal efficiency due to leakage of untreated gas before desulfurization.
  • the heat transfer element block is easy to transport and can be easily assembled on site to form a heat exchanger, so that this type of heat exchanger can be significantly reduced in cost. it can. Also,
  • Fig. 115 is a perspective view of the ceramic plate
  • Fig. 2 is a perspective view of the heat transfer element
  • Figs. 3 and 4 are conceptual side views of the cross-flow heat exchanger. .
  • FIG. 5 to 7 show another embodiment of the present invention.
  • Figure 5 is Den'netsue Leme down Toburo Tsu conceptual side view of click
  • FIG. 6 is VI in FIG. 5 Z o - VI taken along line diagram conceptually side of FIG. 7 is click Rosufuro heat exchanger
  • FIG. 8 is a conceptual side view of a conventional air preheater.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Air Supply (AREA)

Abstract

Echangeur thermique à écoulement transversal pouvant être utilisé dans une plage étendue depuis une région à haute température de gaz d'échappement à une région à basse température de gaz d'échappement en dessous du point de rosée acide. Dans une échangeur thermique conventionnel, tel qu'un préchauffeur d'air du type à conduite en acier, lorsqu'on utilise un gaz comprenant une grande quantité d'un composant corrosif, il est nécessaire d'empêcher la corrosion à basse température et il n'est par conséquent pas possible d'abaisser la température du gaz d'échappement en dessous du point de rosée acide; cela extraîne donc une vitesse d'extraction de chaleur désavantageusement basse dans l'échangeur. L'échangeur thermique ci-décrit utilise un élément échangeur en céramique, insensible à la corrosion à basse température, ce qui permet d'abaisser la température du gaz d'échappement et d'augmenter ainsi la vitesse d'extraction de chaleur. L'échangeur thermique peut être appliqué à un préchauffeur d'air marin (notamment dans la partie basse température), dans un réchauffeur à gaz pour un désulfurateur et des appareils similaires.
PCT/JP1984/000528 1984-11-02 1984-11-02 Echangeur thermique a ecoulement transversal WO1986002718A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
PCT/JP1984/000528 WO1986002718A1 (fr) 1984-11-02 1984-11-02 Echangeur thermique a ecoulement transversal
DE19843490777 DE3490777T1 (fr) 1984-11-02 1984-11-02
GB08614552A GB2194626A (en) 1984-11-02 1984-11-02 Crossflow heat exchanger
SE8602928A SE8602928L (sv) 1984-11-02 1986-07-01 Vermevexlare av tverstromstyp

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP1984/000528 WO1986002718A1 (fr) 1984-11-02 1984-11-02 Echangeur thermique a ecoulement transversal

Publications (1)

Publication Number Publication Date
WO1986002718A1 true WO1986002718A1 (fr) 1986-05-09

Family

ID=13818457

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP1984/000528 WO1986002718A1 (fr) 1984-11-02 1984-11-02 Echangeur thermique a ecoulement transversal

Country Status (4)

Country Link
DE (1) DE3490777T1 (fr)
GB (1) GB2194626A (fr)
SE (1) SE8602928L (fr)
WO (1) WO1986002718A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102287848A (zh) * 2011-07-29 2011-12-21 茂名重力石化机械制造有限公司 斜翅片铸造空气预热器
CN103017193A (zh) * 2013-01-08 2013-04-03 洛阳瑞昌石油化工设备有限公司 一种板式陶瓷空气预热器
WO2018157192A1 (fr) * 2017-03-03 2018-09-07 Ficom Pty Ltd Échangeur de chaleur

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10361346A1 (de) * 2003-12-16 2005-07-14 Deutsches Zentrum für Luft- und Raumfahrt e.V. Platten-Wärmeübertrager, Verfahren zur Herstellung eines Platten-Wärmeübertragers und keramischer Faserverbundwerkstoff, insbesondere für einen Platten-Wärmeübertrager

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5535897A (en) * 1978-09-01 1980-03-13 Gte Sylvania Inc Heat recovery structure and assembly made from ceramic
JPS55102891A (en) * 1978-09-22 1980-08-06 Ceraver Method of making indirect heat exchange element

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3126267A1 (de) * 1981-07-03 1983-01-20 Kernforschungsanlage Jülich GmbH, 5170 Jülich Luftheizeinrichtung mit einem von den verbrennungsgasen eines brenners durchstroemten waermetauscher

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5535897A (en) * 1978-09-01 1980-03-13 Gte Sylvania Inc Heat recovery structure and assembly made from ceramic
JPS55102891A (en) * 1978-09-22 1980-08-06 Ceraver Method of making indirect heat exchange element

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102287848A (zh) * 2011-07-29 2011-12-21 茂名重力石化机械制造有限公司 斜翅片铸造空气预热器
CN103017193A (zh) * 2013-01-08 2013-04-03 洛阳瑞昌石油化工设备有限公司 一种板式陶瓷空气预热器
WO2018157192A1 (fr) * 2017-03-03 2018-09-07 Ficom Pty Ltd Échangeur de chaleur

Also Published As

Publication number Publication date
GB2194626A (en) 1988-03-09
SE8602928D0 (sv) 1986-07-01
GB8614552D0 (en) 1986-07-23
DE3490777T1 (fr) 1987-01-29
SE8602928L (sv) 1986-07-01

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