EP0164340A1 - Procede et installation d'echange thermique recuperateur pour retirer des impuretes d'air chaud pollue, en particulier de gaz de fumees, et pour reduire la corrosion des cheminees - Google Patents

Procede et installation d'echange thermique recuperateur pour retirer des impuretes d'air chaud pollue, en particulier de gaz de fumees, et pour reduire la corrosion des cheminees

Info

Publication number
EP0164340A1
EP0164340A1 EP84900097A EP84900097A EP0164340A1 EP 0164340 A1 EP0164340 A1 EP 0164340A1 EP 84900097 A EP84900097 A EP 84900097A EP 84900097 A EP84900097 A EP 84900097A EP 0164340 A1 EP0164340 A1 EP 0164340A1
Authority
EP
European Patent Office
Prior art keywords
flow
lamella
cooled
flue gases
folding
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Withdrawn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
EP84900097A
Other languages
German (de)
English (en)
Inventor
Gábor SZTELEK
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.)
Licencia Talalmanyokat Ertekesito Vallalat
Original Assignee
Licencia Talalmanyokat Ertekesito Vallalat
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 Licencia Talalmanyokat Ertekesito Vallalat filed Critical Licencia Talalmanyokat Ertekesito Vallalat
Publication of EP0164340A1 publication Critical patent/EP0164340A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J15/00—Arrangements of devices for treating smoke or fumes
    • F23J15/06—Arrangements of devices for treating smoke or fumes of coolers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J15/00—Arrangements of devices for treating smoke or fumes
    • F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
    • 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
    • F28D7/103—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 consisting of more than two coaxial conduits or modules of more than two coaxial conduits
    • 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
    • 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
    • F28D9/0062—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 spaced plates with inserted elements
    • 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
    • F28D9/04—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 being formed by spirally-wound plates or laminae
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2250/00—Arrangements for modifying the flow of the heat exchange media, e.g. flow guiding means; Particular flow patterns
    • F28F2250/10—Particular pattern of flow of the heat exchange media
    • F28F2250/108—Particular pattern of flow of the heat exchange media with combined cross flow and parallel flow
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00—Combustion technologies with mitigation potential
    • Y02E20/30—Technologies for a more efficient combustion or heat usage

Definitions

  • the invention relates to a method for
  • the invention further relates to a recuperation heat exchange device for obtaining contaminants from contaminated warm air, in particular from flue gases, and for reducing chimney corrosion, in which at least one boundary wall of the medium flow spaces forms a lamella, which obstructs the path of the flow and is provided with curvatures.
  • a recuperation heat exchange device for obtaining contaminants from contaminated warm air, in particular from flue gases, and for reducing chimney corrosion, in which at least one boundary wall of the medium flow spaces forms a lamella, which obstructs the path of the flow and is provided with curvatures.
  • Recuperation heat exchangers are also known, in which a laminated partition is formed between two rooms in which media with different temperatures flow and the distance between the two walls is ensured by the arrangement of harmonically folded slats, which have a cross section of a continuous periodic curve . Between these folded fins, the coolant and the medium to be cooled basically flow parallel to the direction of folding, and the folded fins themselves ensure, apart from maintaining the distance, the highest possible heat exchange through metallic ones. Heat conduction, or contribute to better mixing of the flowing medium.
  • the aim of the invention is to ensure the continued use of the impurities contained in flue gases and, at the same time, to reduce the outgoing heat to a minimum value and Reduction of the risk of chimney corrosion.
  • the method according to the invention is based on the knowledge that the dew point of the flue gases lowers when the contaminants are separated from the flue gas by cooling and the moisture content is thus reduced. Then the cooled flue gases can flow out through the chimney through slight re-heating without risk of condensation with a reduction in environmental pollution and the deposited materials can be reused.
  • the specific heat transfer of the turbulent heat exchangers can also be achieved and increased in the case of the multi-layer finned heat exchangers by designing the walls of the individual layers in place of the individual components securing the turbulence and by omitting the spacing elements in such a way that the degree of turbulence is not reduced and so the efficiency of heat transfer with reduced material expenditure is not less but even higher.
  • the object is achieved by the inventive method in that the contaminated hot air and / or the flue gas is cooled to a temperature which is below the dew point of the contaminating gases and / or below the acid dew point near the temperature of the coolant, then the cooled contaminated Air and / or the flue gas slightly with the contaminated warm air to be cooled and / or the flue gas to a temperature above that remaining
  • Moisture content belonging dew point is reheated and derived.
  • the essence of the heat exchange device according to the invention is that the boundary walls of the flow spaces of the media are in direct contact with one another or are arranged one after the other at a predetermined distance.
  • FIG. 1 shows an embodiment of the heat exchange device according to the invention, in which in each flow space the direction of folding of the lamella forming only one boundary wall from the boundary walls of the flow spaces is perpendicular to the direction of flow;
  • FIG. 2 shows another embodiment of the heat exchange device according to the invention, in which the flow spaces are alternately designed such that a boundary wall is formed in one flow space and both boundary walls are formed by fins folded perpendicular to the flow direction in the other flow space;
  • Figure 3 shows a further embodiment of the heat exchange device according to the invention, in which both boundary walls of each flow space represent a lamella folded perpendicular to the flow direction;
  • FIG. 1 shows an embodiment of the heat exchange device according to the invention, in which in each flow space the direction of folding of the lamella forming only one boundary wall from the boundary walls of the flow spaces is perpendicular to the direction of flow
  • FIG. 2 shows another embodiment of the heat exchange device according to the invention, in which the flow spaces are alternately designed such that a boundary wall is
  • FIG. 4 shows an axial section of the device according to the invention designed as a spiral lamella heat exchanger
  • Figure 5 is a schematic diagram of the reheating of the flue gases
  • 6 shows another solution for the reheating of the flue gases, in which the reheating takes place in the flow space, between the block formed from lamellae and the jacket of the device is formed
  • FIG. 7 shows a coaxial, cylindrical heat exchanger formed from fins provided with different curvatures.
  • slats 1 folded in a harmonic shape with a cross section of a continuous periodic curve are alternately arranged at an angle, preferably at a right angle, in their folding direction such that the folding directions of every second slat 1 are parallel to one another. In this way the folding direction is that of
  • Such a design of the boundary walls 3 is suitable for generating a turbulence flow, since the flowing medium causes a constant change of direction through the boundary wall 3 projecting into the flow space 2 to the direction perpendicular to
  • the molecular collision creates compressive spaces in the vicinity of the location of the collision, while consequently depressing spaces arise behind this location.
  • the heat emission increases via the boundary walls 3 and the heat absorption of the flowing coolant increases on the other side of the boundary walls 3.
  • Flow direction of the medium is arranged.
  • the flow directions in two adjacent flow spaces 2 can be opposite to one another, or they can form an angle, preferably a right angle.
  • the outputs and inputs of the slats 1, which are preferably combined in pairs to form a pocket are also shown and designated by reference number 4. These form side-by-side connections or inputs 4 of the medium. (However, the exits of the flow spaces 2 between the pockets are not shown here).
  • FIG. 4 shows the inventive configuration of the spiral fin heat exchanger known per se.
  • the spiral fin heat exchanger can be formed with a single fin 1.
  • the folding direction of the fin 1 is parallel to the axis of the spiral fin heat exchanger, while the Flow spirally inwards or outwards in a surface parallel to the surface which is perpendicular to the axis of the heat exchanger, and in the region of the axis in the axial direction (ie perpendicular to the plane of the drawing) there are outlets ensuring outward or inward flow ( marked with arrows).
  • harmonically folded slats instead of the harmonically folded slats 1, other slats provided with curvatures can also be used, for example with parallel slats
  • Slats provided with curvatures or in accordance with zigzag pattern with slats provided with herringbone arches, or with slats provided with curvatures in accordance with the circular wave profile, or with arches structured independently of one another, e.g. slats provided with spherical cap patterns, or a combination thereof.
  • FIG. 5 shows the basic circuit arrangement suitable for carrying out the method according to the invention.
  • the entrances and exits of the flow spaces securing the flow of the medium to be cooled are combined and the outputs of the flow spaces of the medium to be cooled are connected to a common entrance of a part of the flow spaces of the coolant.
  • a common entrance of another part of the flow spaces of the coolant serves to supply the coolant, while the outputs of all flow spaces of the coolant are combined.
  • FIG. 1 Another arrangement for carrying out the method according to the invention is shown in FIG.
  • the flow spaces of the coolant are in one
  • Input 5 of the coolant and an output 6 of the coolant connected.
  • the inlet of the flow spaces of the medium to be cooled is connected to an inlet 7 of the flue gas.
  • the outlet of the flow spaces of the medium to be cooled is at reheating channels 9 connected.
  • the reheating duct 9 is a space between the block formed by means of folded and / or arched slats 1 and the preferably heat-insulated jacket 11.
  • the outlet of the reheating duct 9 is connected to the outlet 10 of the flue gas.
  • An outflow 8 of the precipitation is preferably arranged at the low point of the reheating duct 9.
  • FIG. 7 shows a heat exchanger designed with lamellae, in which the lamellae, in addition to their folds and / or arches, have such curvatures that they form self-returning, coaxially arranged cylinder jacket surfaces.
  • each lamella 1 and the boundary wall 3 each represent a flow space.
  • the mode of operation of the heat exchangers according to the invention is explained in more detail below:
  • the medium to be cooled e.g. Flue gas, contaminated technology air, etc.
  • the vcn coolant such as. e.g. Cold air flowing through flow spaces are arranged, cooled to a temperature close to the temperature of the coolant. Since this temperature is far below the dew point of the contaminants, or the acid dew point, the contaminants in the flue gas settle and can be discharged.
  • the cooled medium to be cooled has to be reheated slightly so that it reaches a temperature above the dew point corresponding to the moisture content and can thus be derived without causing chimney corrosion.
  • this can be carried out such that, in addition to the coolant, the cooled medium can also be used as the coolant in the heat exchanger, and thus the heating itself is carried out with the medium to be cooled.
  • the cooling of the contaminated hot air can be carried out by means of air or foreign medium-promoting contact elements, preferably the returning water of the boiler.
  • the flue gas or other technological warm air with a temperature higher than 100 ° C is derived, so the amount of heat associated with the temperature difference can be recovered and valuable chemical raw materials can be obtained from the contaminants.

Landscapes

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

Abstract

Procédé pour retirer des impuretés d'air chaud pollué, en particulier de gaz de fumées, et pour réduire la corrosion des cheminées, grâce auquel l'air chaud pollué et/ou les gaz de fumées sont refroidis et au moins une partie des impuretés est déposée avant le réchauffage de l'air pollué et/ou des gaz de fumées refroidis. Une installation d'échange thermique récupérateur permet de retirer des impuretés de l'air chaud pollué, en particulier des gaz de fumées, et de réduire la corrosion des cheminées, installation dans laquelle au moins une paroi de séparation de chambres d'écoulement des milieux est une lamelle dotée de courbures et constituant un obstacle pour le chemin d'écoulement des milieux. Le présent procédé a pour but de refroidir l'air chaud pollué et/ou les gaz de fumées à une température inférieure au point de rosée des gaz pollués et/ou au point de rosée acide et proche de la température du réfrigérant, puis à réchauffer l'air pollué et/ou les gaz de fumées refroidis peu à peu par le biais de l'air chaud pollué et/ou des gaz de fumées à refroidir pour les amener à une température supérieure au point de rosée appartenant à la teneur en humidité restante, avant de les évacuer. La présente installation a pour but de disposer les parois de séparation (3) des chambres d'écoulement (2) directement l'une contre l'autre ou indirectement l'une après l'autre à une distance prédéterminée.
EP84900097A 1983-12-07 1983-12-07 Procede et installation d'echange thermique recuperateur pour retirer des impuretes d'air chaud pollue, en particulier de gaz de fumees, et pour reduire la corrosion des cheminees Withdrawn EP0164340A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/HU1983/000061 WO1985002671A1 (fr) 1983-12-07 1983-12-07 Procede et installation d'echange thermique recuperateur pour retirer des impuretes d'air chaud pollue, en particulier de gaz de fumees, et pour reduire la corrosion des cheminees

Publications (1)

Publication Number Publication Date
EP0164340A1 true EP0164340A1 (fr) 1985-12-18

Family

ID=10980536

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84900097A Withdrawn EP0164340A1 (fr) 1983-12-07 1983-12-07 Procede et installation d'echange thermique recuperateur pour retirer des impuretes d'air chaud pollue, en particulier de gaz de fumees, et pour reduire la corrosion des cheminees

Country Status (2)

Country Link
EP (1) EP0164340A1 (fr)
WO (1) WO1985002671A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH696874A5 (de) * 1997-06-04 2008-01-15 Kuehni Ag Verfahren zum Trennen eines Gemisches, Vorrichtung zur Durchführung des Verfahrens und Verwendung der Vorrichtung.
DE102005005293A1 (de) * 2005-02-04 2006-08-10 Küba Kältetechnik GmbH Lamellenwärmetauscher und Lamelle dafür
EP2924384A1 (fr) * 2014-03-24 2015-09-30 Siemens VAI Metals Technologies GmbH Échangeur de chaleur à contre-courant avec guidage forcé du gaz/de l'air

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1141044B (de) * 1960-06-10 1962-12-13 Steinmueller Gmbh L & C Verfahren zur Ausnutzung der potentiellen Leistung des Heissluftrueckstromes zur Eintrittsseite von Luftvorwaermern in einem Dampferzeuger
SE356809B (fr) * 1968-12-27 1973-06-04 E Jouet
SE423750B (sv) * 1977-01-14 1982-05-24 Munters Ab Carl Anordning vid vermevexlare for sensibel och/eller latent vermeoverforing
DD133356A1 (de) * 1977-10-26 1978-12-27 Werner Heinig Spiralwaermeuebertrager

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8502671A1 *

Also Published As

Publication number Publication date
WO1985002671A1 (fr) 1985-06-20

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Inventor name: SZTELEK, GABOR