EP0123242A2 - Echangeur de chaleur, chauffé par le gaz des fumées, pour fournaux à combustible sulfureux - Google Patents

Echangeur de chaleur, chauffé par le gaz des fumées, pour fournaux à combustible sulfureux Download PDF

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Publication number
EP0123242A2
EP0123242A2 EP84104261A EP84104261A EP0123242A2 EP 0123242 A2 EP0123242 A2 EP 0123242A2 EP 84104261 A EP84104261 A EP 84104261A EP 84104261 A EP84104261 A EP 84104261A EP 0123242 A2 EP0123242 A2 EP 0123242A2
Authority
EP
European Patent Office
Prior art keywords
heat exchanger
insert body
heat
flue gas
heat storage
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.)
Granted
Application number
EP84104261A
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German (de)
English (en)
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EP0123242B1 (fr
EP0123242A3 (en
Inventor
Alfons Jaumann
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Individual
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Individual
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Publication date
Application filed by Individual filed Critical Individual
Priority to AT84104261T priority Critical patent/ATE32259T1/de
Publication of EP0123242A2 publication Critical patent/EP0123242A2/fr
Publication of EP0123242A3 publication Critical patent/EP0123242A3/de
Application granted granted Critical
Publication of EP0123242B1 publication Critical patent/EP0123242B1/fr
Expired 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
    • 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
    • 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
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D21/0001—Recuperative heat exchangers
    • F28D21/0003—Recuperative heat exchangers the heat being recuperated from exhaust gases

Definitions

  • the invention relates to a flue gas-heated heat exchanger for furnaces with sulfur-containing fuels, with a housing through which the flue gas flows and provided with at least one heat storage insert body, in which passages for a medium that absorbs and dissipates the flue gas heat, for example water or air, are arranged.
  • a flue gas-heated heat exchanger of the type mentioned can be integrated in a boiler, but can also be retrofitted to existing combustion systems, in particular central heating systems. It reduces exhaust gas losses. Because it is also able to store a part of the exhaust gas heat, it is particularly advantageous in intermittently operated furnaces, because the heat storage insert body provides further heating of the heat-dissipating medium during the non-burning times, as a result of which a more uniform heat emission from the heat exchanger is achieved and unwanted condensation of corrosive flue gas components can be suppressed.
  • the increasing pollution of the environment makes it advisable to reduce the pollutant emissions from combustion systems, in particular also from building heating systems, even more than before.
  • the invention is based on the object of designing a flue gas-heated heat exchanger of the type mentioned at the outset in such a way that it additionally leads to a reduction in the pollutant emissions of a furnace equipped with it.
  • the heat storage insert body has or limits passage channels for the flue gas, the total diameter of which is larger than the diameter of the boiler flue gas outlet connection piece, and the heat storage insert body is made at least in the area of its flue gas passage channels consists of a material or has a coating which binds sulfur compounds at relatively low temperatures.
  • the main aim is to adsorb the sulfur compounds.
  • the heat storage insert body can be made, for example, from one or more hollow-brick bricks made of clay or sand-lime brick or from porous blocks made of aerated concrete, pumice, expanded clay, lime granules or limestone gravel, which are able to absorb a surprisingly high proportion of those from the boiler escaping and contained by the larger passage cross section in the heat storage slowing flue gas contained mineral acid vapors.
  • the adsorption effect can be increased by an additional flue gas filter layer in the heat exchanger, for example by a coke pack through which the flue gas must flow.
  • the heat storage insert body of a heat exchanger designed according to the invention can be designed by the choice of the number of its individual bodies both in terms of its heat storage and adsorption capacity and in terms of its flue gas passage cross section in the modular system in various sizes and accommodated in a suitably and sufficiently large-sized unit housing.
  • the heat exchanger can therefore be easily adapted to different sized firing systems.
  • the cost of materials is low. This fulfills an important requirement for the use of the heat exchanger in every building heating system.
  • the heat storage insert body is expediently designed to be exchangeable, so that it can be partially or completely replaced for maintenance or after saturation of its adsorption areas.
  • the exhaust gas temperature can be reduced by the heat exchanger more than usual, even below 100 0 C and thus using condensation heat, without the risk of sooting the chimney into which the Flue gases are passed on.
  • a heat exchanger designed according to the invention thus results in addition to the recovery of part of the flue gas heat in connection with heat storage, a binding of a large part of the sulfur compounds contained in the flue gas, a greater reduction in the exhaust gas temperature than usual and inevitably also a greater filling of dust, which forms additional adsorption or absorption material.
  • a heat exchanger according to the invention can be produced in numerous shapes, for example rectangular or round in cross-section, adapted to the largely boiler-related space conditions in building heating systems.
  • the heat exchangers shown schematically in the drawing are merely selected individual examples, which can be attached to a boiler room wall or placed on a boiler, for example.
  • the heat exchanger 10 shown in Fig. 1 has a rectangular, for example made of stainless steel housing 11 and is horizontally divided into several individual areas. In its lower area, a dust-collecting chamber 12 is formed, into which a flue gas connecting piece 13 opens at the side, which connects with the smoke gas exhaust port of a boiler, not shown, is connectable.
  • the dust collection chamber 12 is accessible through a closable cleaning opening 14 and is delimited at the top by a support frame 15 on which a heat storage insert body 16 is constructed from individual hollow hole bricks 17 stacked side by side and one above the other.
  • La shows a section of a set of mutually spaced to form flow gaps 18 'and hollow holes 17 arranged in the gap, which have vertically aligned passage channels 18 in the insert body 16, through which the flue gas from the dust collection chamber 12 in the upper part of the housing 11 can flow.
  • There - separated by two layers of further heat storage bodies 19 - chambers 20 and 21 are formed, in which only schematically indicated coils 21 are arranged.
  • the coils 21 return water of a hot water central heating system, not shown, or process water for the removal of flue gas heat is passed through. From the upper chamber 21, the flue gas is conducted downward in a channel 23 that extends over the entire width of the housing 10 along a side wall to a flue gas outlet opening 24 of the housing 11.
  • the housing 11 is provided on the side wall having the connecting piece 13 in its central region with a large opening which can be closed by a door (not shown), through which the hollow-hole brick 17 forming the heat storage insert body 16 can be exchanged.
  • FIG. 2a and 2b show a heat exchanger 30, which has a similar internal structure as the heat exchanger according to FIG. 1, but serves to heat room air, which is pressed by means of a schematically indicated fan 31 through pipes or metal hoses 32, which are in the upper part of the housing 33 are arranged in two chambers 34 through which the flue gas flows.
  • the air outlet connection is designated in the drawing with the reference number 35.
  • the lower half of the housing 33 is provided in the same way as in the heat exchanger 10 with a heat storage insert body 16 'composed of individual hollow bricks or hollow stones, which is arranged on a support frame 15' above a dust collection chamber 12 '.
  • the flue gas sweeps from the inlet opening 13 'through the hollow bricks or hollow stones of the heat storage insert body 16' and through a filter layer 36 of coke placed on the insert body 16 'into the heat exchanger chambers 34.
  • the flue gas is withdrawn from the uppermost heat exchanger chamber 34 again an exhaust duct 37 which extends over the entire width of a side wall to a flue gas outlet opening 38 formed in the lower region of the housing 33.
  • Fig. 2b shows the heat exchanger 30 with its housing 33, designed for a smaller boiler.
  • the total flue gas passage cross section and the heat storage volume are practically halved by reducing the heat storage insert body 16 ".
  • FIG - Insert body 16 " While in the embodiment according to FIG - Insert body 16 "only three columns of hollow bricks 17 'or hollow stones. The one through the Removal of hollow perforated brick space 39 is closed by walls 39 ', so that no flue gases can flow through here.
  • the hollow perforated bricks 17, 17 'used in the heat exchangers 10 and 30 are made of clay or sand-lime brick. Both materials have been shown to be able to adsorb a significant proportion of the sulfur compounds contained in the flue gas.
  • the heat storage insert body can of course also be made from other materials which cause a strong binding of SO, but the materials mentioned above are the cheapest. It is extremely important to keep the price of such heat stores as low as possible in order to achieve the mass use of heat stores that is desirable to reduce pollution.
  • Fig. 3 shows a schematic longitudinal section through a heat exchanger 40, which in turn is intended for heating room air by means of the exhaust gas heat.
  • plate-shaped ceramic bodies 41 are arranged vertically at a distance parallel to one another.
  • the plate body can be composed of several individual stones.
  • channels 52 are formed in the ceramic body, through which the air to be heated is pressed by means of a blower 42.
  • the channels 52 are not shown in the ceramic bodies 41 of FIG. 3 for the sake of clarity, but dashed arrows 43 indicate the path that the air takes through the ceramic stones, which alternately through lower connecting stones 44 or upper connecting stones 45, in detail in Fig. 6 Darge are connected.
  • the flue gas entering the heat exchanger through an inlet connection 46 reaches the spaces 47 between the individual ceramic bodies 41. These spaces are divided by metal sheets 48, all of which are anchored to an upper support plate 49. The sheets 48 end at a distance from the lower connecting blocks 44.
  • the flue gas takes a path indicated by solid arrows through all the spaces 47 and leaves the heat exchanger 40 through an outlet connection 53.
  • the outlet opening for the air to be heated is designated by the reference number 54. Behind this outlet opening 54 there is an air compensation chamber 55 in the upper part of the heat exchanger 40, in which a fresh air admixture to the heated room air can take place.
  • the lower and upper connecting blocks 44 and 45 are provided with plug-in tube connections 56 according to FIG. 5. There are narrow connecting blocks that each run between the openings of the channels 52 of two adjacent ceramic plates 51. There are gaps between the individual connecting blocks 44, 45 through which the flue gases can pass. At the bottom of the housing of the heat exchanger 40 there are soot and dust deposition chambers 57 which can be opened below the spaces 47 in a manner not shown. Also in the case of the heat exchanger 40, the housing is open at least on one side and can be closed by a door (not shown). The ceramic plates 41 can be replaced through this opening.
  • FIG. 4 shows a heat exchanger 50 which has a similar structure to the heat exchanger according to FIG. 3.
  • the air passage channels 52 equipped ceramic plates 51 are narrower than the ceramic plates 41 and also lined up with narrower gaps 58.
  • the openings of the channels 52 of adjacent ceramic plates 51 are connected via individual plug-in heads 59 with plug-in tube bridges 60, between which the flue gas can change from one intermediate space 58 to the next intermediate space.
  • the plug heads 59 themselves are continuous strips which alternately prevent passage of the flue gases over the lower or the upper end of a ceramic plate 51.
  • the ceramic plates 41 and 51 are provided on both sides with a coating 61 made of a SO x- binding material, for example a calcareous mass. After this coating has been saturated with SO x , the ceramic plates 41, 51 can be removed and regenerated in an alkaline liquid. A new coating of the ceramic plates is also conceivable.
  • Fig. 5 shows a plan view of a block 65 for a heat storage insert body of the heat exchanger, in which both slot-shaped through channels 66 for the flue gas and round through channels 67 for air or water, that is, for the heat-dissipating medium, are formed.
  • the block 65 is formed, for example, from sand-lime brick, the walls of the round through channels 67 being provided with an air and water impermeable cover layer.
  • the building blocks 65 can be packed tightly against one another, and the connection of the round through channels 67 of neighboring building blocks 65 can take place by means of plug-in pipe bends 68 provided with seals, not shown, according to FIG. 7.

Landscapes

  • 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)
  • Treating Waste Gases (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Separation Of Gases By Adsorption (AREA)
EP84104261A 1983-04-23 1984-04-14 Echangeur de chaleur, chauffé par le gaz des fumées, pour fournaux à combustible sulfureux Expired EP0123242B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84104261T ATE32259T1 (de) 1983-04-23 1984-04-14 Rauchgasbeheizter waermetauscher fuer feuerungsanlagen mit schwefelhaltigen brennstoffen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19833314757 DE3314757A1 (de) 1983-04-23 1983-04-23 Rauchgasbeheizter waermetauscher fuer feuerungsanlagen mit schwefelhaltigen brennstoffen
DE3314757 1983-04-23

Publications (3)

Publication Number Publication Date
EP0123242A2 true EP0123242A2 (fr) 1984-10-31
EP0123242A3 EP0123242A3 (en) 1984-11-28
EP0123242B1 EP0123242B1 (fr) 1988-01-27

Family

ID=6197171

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84104261A Expired EP0123242B1 (fr) 1983-04-23 1984-04-14 Echangeur de chaleur, chauffé par le gaz des fumées, pour fournaux à combustible sulfureux

Country Status (4)

Country Link
US (1) US4655802A (fr)
EP (1) EP0123242B1 (fr)
AT (1) ATE32259T1 (fr)
DE (2) DE3314757A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2202932A (en) * 1987-03-26 1988-10-05 Coppermill Limited Recuperators for heating air

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2167213C (fr) * 1993-07-16 2003-09-30 Richard E. Groh (Deceased) Methode de mise en oeuvre de beton leger et de preparation d'un melange contenant du beton leger, et melange resultant de l'application de ladite methode
US6863711B2 (en) * 2002-12-06 2005-03-08 Hamilton Sundstrand Temperature swing humidity collector using powerplant waste heat
WO2006100072A1 (fr) * 2005-03-24 2006-09-28 Behr Gmbh & Co. Kg Echangeur thermique pour gaz d'echappement, notamment refroidisseur de gaz d'echappement pour le recyclage des gaz d'echappement dans les vehicules a moteur
US9683474B2 (en) 2013-08-30 2017-06-20 Dürr Systems Inc. Block channel geometries and arrangements of thermal oxidizers
CN113819483B (zh) * 2021-09-18 2022-11-01 华能曲阜热电有限公司 一种减缓积灰耐腐蚀的空预器

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE217126C (fr) *
US2706109A (en) * 1950-03-11 1955-04-12 Jarvis C Marble Heat transfer elements of ceramic material
US4156625A (en) * 1976-08-27 1979-05-29 Wachendorfer Paul L Sr Method of making a monolithic refractory recuperator
US4163430A (en) * 1978-02-08 1979-08-07 Neumann Siegmar R Heat recovery and filter system and process for furnace exhaust gases
DE2943924A1 (de) * 1979-10-31 1981-05-14 Wilhelm 6902 Sandhausen Krämer Abgaswaermegewinnungsvorrichtung fuer heizungs- und brauchwasseranlagen
DE3010886A1 (de) * 1980-03-21 1981-10-15 Dümling GmbH, 6508 Alzey Vorrichtung zum ausbrennen der in einem heizkessel anfallenden abgase
DE3024144A1 (de) * 1980-06-27 1982-01-14 Helmut 7500 Karlsruhe Latzko Kaminbaustein
US4378045A (en) * 1978-10-19 1983-03-29 Davy Inc. Interlocking checker tile and supporting means for regenerative heating stoves

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US2905523A (en) * 1955-12-19 1959-09-22 Oxy Catalyst Inc Method for the elimination of finely divided carbonaceous material from gas streams
US3203472A (en) * 1963-11-22 1965-08-31 Brandt Herbert Heat exchangers
US3276186A (en) * 1964-07-22 1966-10-04 Calgon Corp Filter composition and method of removing hydrogen sulfide from water
US3589863A (en) * 1968-03-08 1971-06-29 Dow Chemical Co Method of removing sulfur dioxide and particulate matter from gaseous streams
US3780498A (en) * 1972-03-31 1973-12-25 Universal Oil Prod Co Sulfur oxides removal system
US4003979A (en) * 1973-11-26 1977-01-18 Kanebo, Ltd. Method of cleaning air containing carbon monoxide
US4177158A (en) * 1978-02-13 1979-12-04 Chevron Research Company Method for producing an attrition-resistant adsorbent for sulfur dioxide, the resulting composition and a process using same
BR8108835A (pt) * 1980-10-17 1982-09-21 Hoelter H Processo e dispositivo para a purificacao de ar poluido com substancias nocivas
US4467785A (en) * 1980-12-01 1984-08-28 Langford Cooper A Chemical heat storage
US4497361A (en) * 1981-06-15 1985-02-05 Hajicek David J Regenerative heat and humidity exchanging apparatus

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE217126C (fr) *
US2706109A (en) * 1950-03-11 1955-04-12 Jarvis C Marble Heat transfer elements of ceramic material
US4156625A (en) * 1976-08-27 1979-05-29 Wachendorfer Paul L Sr Method of making a monolithic refractory recuperator
US4163430A (en) * 1978-02-08 1979-08-07 Neumann Siegmar R Heat recovery and filter system and process for furnace exhaust gases
US4378045A (en) * 1978-10-19 1983-03-29 Davy Inc. Interlocking checker tile and supporting means for regenerative heating stoves
DE2943924A1 (de) * 1979-10-31 1981-05-14 Wilhelm 6902 Sandhausen Krämer Abgaswaermegewinnungsvorrichtung fuer heizungs- und brauchwasseranlagen
DE3010886A1 (de) * 1980-03-21 1981-10-15 Dümling GmbH, 6508 Alzey Vorrichtung zum ausbrennen der in einem heizkessel anfallenden abgase
DE3024144A1 (de) * 1980-06-27 1982-01-14 Helmut 7500 Karlsruhe Latzko Kaminbaustein

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2202932A (en) * 1987-03-26 1988-10-05 Coppermill Limited Recuperators for heating air
GB2202932B (en) * 1987-03-26 1991-05-15 Coppermill Limited Heat regenerators

Also Published As

Publication number Publication date
EP0123242B1 (fr) 1988-01-27
DE3469057D1 (en) 1988-03-03
ATE32259T1 (de) 1988-02-15
US4655802A (en) 1987-04-07
DE3314757A1 (de) 1984-10-25
EP0123242A3 (en) 1984-11-28

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