WO1996036840A1 - Systeme de cheminee pour une chaudiere a condensation - Google Patents

Systeme de cheminee pour une chaudiere a condensation Download PDF

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Publication number
WO1996036840A1
WO1996036840A1 PCT/DE1996/000845 DE9600845W WO9636840A1 WO 1996036840 A1 WO1996036840 A1 WO 1996036840A1 DE 9600845 W DE9600845 W DE 9600845W WO 9636840 A1 WO9636840 A1 WO 9636840A1
Authority
WO
WIPO (PCT)
Prior art keywords
air
wall
condensate
pipe
chimney system
Prior art date
Application number
PCT/DE1996/000845
Other languages
German (de)
English (en)
Inventor
Jürgen KUCK
Original Assignee
Kuck Juergen
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 Kuck Juergen filed Critical Kuck Juergen
Publication of WO1996036840A1 publication Critical patent/WO1996036840A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H8/00—Fluid heaters characterised by means for extracting latent heat from flue gases by means of condensation
    • F24H8/003—Fluid heaters characterised by means for extracting latent heat from flue gases by means of condensation having means for moistening the combustion air with condensate from the combustion gases
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J2211/00—Flue gas duct systems
    • F23J2211/10—Balanced flues (combining air supply and flue gas exhaust)
    • F23J2211/101—Balanced flues (combining air supply and flue gas exhaust) with coaxial duct arrangement
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J2900/00—Special arrangements for conducting or purifying combustion fumes; Treatment of fumes or ashes
    • F23J2900/13004—Water draining devices associated with flues
    • 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
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]

Definitions

  • the invention relates to a chimney system for a condensing boiler, with at least one exhaust pipe and at least one air pipe, which are arranged in such a way that the outer wall of one pipe forms an inner wall of the other pipe (air chimney).
  • the combustion of fossil fuels in heating systems mainly produces CO 2 and water vapor.
  • the energy content of the fuel is usually indicated by the calorific value, which results from the enthalpy difference of the products of the
  • the calorific value of a fuel is higher than the calorific value by the condensation enthalpy of the gaseous water vapor in the exhaust gas. Boilers in which the enthalpy of condensation contained in the flue gas
  • condensing boilers Water dispenser is used are referred to as condensing boilers. Since the reference value for calculating the efficiency of a heating system is usually based on the calorific value, condensing boilers can achieve efficiencies> 100%.
  • the exhaust gas is passed through a heat exchanger in which the water vapor condenses and the enthalpy of condensation increases the energy content of the heating medium flowing around, generally water.
  • a heat exchanger in which the water vapor condenses and the enthalpy of condensation increases the energy content of the heating medium flowing around, generally water.
  • Such systems generally have the problem that the return temperature of the heating water must be below the water vapor dew point in the exhaust gas in order to effect the condensation effect.
  • the return temperature of the heating water is only so low in the transition period, ie in spring and autumn that the water vapor contained in the exhaust gas can condense out.
  • the temperature of the heating water In winter, on the other hand, when the energy consumption is greatest and therefore an increase in efficiency is most desirable, the temperature of the heating water must be high enough to achieve a sufficient heating effect, so that the return temperature of the heating water is also comparatively high and in any case too high to allow for the heating effect Bring water vapor to condense.
  • EP-OS 0 425 363 are known.
  • the condensate collected is conveyed by means of a pump to a heat exchanger, in which the exiting exhaust gas preheats the supplied combustion air.
  • the collected condensate is injected into the air flow, so that the partial pressure of the water vapor in the air rises and thus also the partial pressure of the water vapor in the exhaust gas leaving the boiler.
  • the water vapor dew point in the exhaust gas is shifted upward, so that condensation and thus a recovery of the condensation enthalpy of the water vapor contained in the exhaust gas is made possible even at comparatively high temperatures of the process water or heating medium.
  • heat exchangers have become known in which the wall between the combustion air to be preheated and humidified and the exhausting flue gas (exhaust gas) consists of an absorbent technical fabric.
  • the condensation water arising from the water vapor soaks in the flue gases the tissue that forms the wall alone, migrates through the pores of the tissue and becomes water vapor in the combustion air.
  • the exhaust gas contains only small amounts of water vapor after flowing through the heat exchanger operated with the refluxing heating water, accordingly only a small amount of condensed water is formed, so that especially when starting up such a plant, it is not guaranteed that the tissue that alone the wall of the Heat exchanger forms, is soaked with condensed water overall.
  • the invention is therefore based on the object of making it possible, using simple constructional means, to humidify the combustion air supplied to a condensing boiler with condensate obtained from the exhaust gas.
  • the solution according to the invention consists in that arranged on the exhaust side of the common wall, that at least one bore connecting the exhaust side to the air side is arranged in the region of each condensate collection plate, and that a distribution device for the condensate is arranged on the air side in the region of the bore.
  • the term "sheet metal" is used to describe a component, regardless of whether it is made of a metallic material or not.
  • the condensate collecting sheets according to the invention can also be made from a plastic. In particular, they can also be formed in one piece with the wall on which they are arranged.
  • the condensate collecting plates provided according to the invention on the flue gas side of the common wall, the condensate deposited on the wall, which runs down the wall due to gravity, is collected and passed through the bore to the air side of the chimney system. Since the amounts of condensate which are conducted in this way to the air side of the chimney system are comparatively small, care must be taken to ensure that they are distributed on the air side of the common wall to form a film of the largest possible area in order to prevent evaporation in the bypassing, humidified and heated combustion air.
  • the distribution device is provided, which is arranged in the region of the respective bore.
  • the distribution device consists of a fleece or fabric with a capillary effect, with which the wall is covered on the air side.
  • the individual hygroscopic fibers that make up the fleece or the fabric suck the condensate out of the mouth area in the wall provided hole and distribute it over a large area, so that good evaporation is guaranteed.
  • the shell-shaped baffle plates preferably have overflow incisions at their upper peripheral edge, so that the condensate flowing through the bore, which is distributed within the shell, runs over the edge at various points on the peripheral edge of the shell and a distribution effect is thereby produced .
  • the partial flows flowing through the individual overflow incisions likewise lead to good to complete wetting of the air-side outer surface of the common wall between the air pipe and the exhaust pipe, so that a good evaporation effect is ensured.
  • the air-side surface of the common wall can in each case be lined with absorbent fleece below the guide plates.
  • Figure 1 - a chimney system according to the invention, in which the distribution device is formed as an absorbent fleece, and
  • Figure 2 - a chimney system according to the invention, in which the distribution device is formed by shell-shaped condensate baffles.
  • the chimney system for a condensing boiler shown in FIG. 1 consists of an outer air pipe 10 with a circular cross section, in which an inner exhaust pipe 20 with a likewise circular cross section is arranged concentrically.
  • the wall 22 of the exhaust pipe 20 simultaneously forms the inner wall of the air pipe 10 and thus represents a common wall of both the air pipe and the exhaust pipe.
  • the smoke or exhaust gas originating from a boiler flows through a likewise not shown Heat exchanger in which it releases a large part of its entrained enthalpy of entrainment to the heating medium.
  • the exhaust gas which still contains water vapor, then flows through a supply nozzle 24 into the exhaust pipe 20 and rises to the top of the exhaust, not shown.
  • the exhaust gas flowing past the wall 22 is cooled and the heat passing through the wall 22 heats up the combustion air flowing through the air pipe 10 in the opposite direction.
  • the air flows through a nozzle 26 and is conducted from there to the boiler.
  • the rising exhaust gas is cooled down on the wall 22 to such an extent that condensation occurs there and a condensate film flows downward on the wall 22 due to the force of gravity.
  • Condensate collecting plates 28 are arranged, only one of which is shown in FIG. 1.
  • the annular condensate collecting plate 28 is provided with a concave cross section in a radially placed section towards the wall 22, so that an annular collecting space 30 for the condensate 32 is formed.
  • bores 34 are regularly distributed in the wall 22 through which the accumulated condensate 32 can flow from the exhaust side to the air side of the wall.
  • the air side of the wall 22 is covered with a fleece 36, which consists of hygroscopic fibers.
  • Both the air pipe 10 and the exhaust pipe 20 are each closed at their lower ends and each have a siphon system 38 or 40 in order to discharge excess condensate.
  • FIG. 2 shows an alternative embodiment of the distribution device, in which shell-shaped condensate baffles 42 are arranged on the air side of the common wall 22.
  • the condensate 32 flows here through the holes 34, which are also distributed uniformly in the circumferential direction in the wall, whereupon a hydrostatic equilibrium is established, so that the level of the condensate in the annular shells formed on the exhaust gas side of the wall and on the air side of the wall is equally high (due to pressure differences in exhaust gas and Air, there may also be level differences).
  • the level of the condensate in the air-side shell 42 rises until overflow incisions 44 are reached which are arranged in the upper edge 46 of the shell or the condensate baffle 42.
  • the condensate 32, 32 ' is distributed. This also ensures that the largest possible surface is wetted for a given condensate volume, so that the air flowing past causes complete evaporation and is in turn moistened.
  • an exhaust pipe 20 is arranged concentrically in an air pipe 10.
  • a plurality of exhaust pipes 20 connected in parallel in a common air pipe 10 of larger diameter. In this way, the total area available for heat and mass transport is increased with the same flow cross-sections for the exhaust gas being drawn off.

Abstract

L'invention concerne un système de cheminée pour une chaudière à condensation, comprenant au moins un tuyau à gaz de fumée (20) et au moins un tuyau à air (10) qui sont disposés pour s'entourer mutuellement de sorte que la paroi extérieure (22) d'un tube (20) forme une paroi qui entoure l'autre (10). Un tel dispositif est également appelé cheminée à air et à gaz de fumée et est utilisé dans de petites installations de chauffage pour préchauffer l'air de combustion alimentant la chaudière à condensation. Afin qu'il soit possible d'humidifier l'air de combustion à l'aide de moyens constitutifs simples et ainsi d'élever le point de condensation de la vapeur d'eau dans les gaz de fumée et permettre une meilleure utilisation de l'enthalpie de condensation, il est prévu, selon l'invention, que sur le côté de la paroi commune où passent les gaz de fumée soient disposées des plaques collectrices de condensat (28), que dans la zone de chaque plaque collectrice de condensat se trouve au moins un alésage (34) reliant le côté où passent les gaz de fumée et le côté où passe l'air, et qu'il y ait un distributeur de condensat (36), du côté où passe l'air, dans la zone de chaque alésage. Le distributeur consiste, de préférence, en une nappe (36) à effet capillaire qui recouvre la paroi (22) sur le côté où passe l'air. Le condensat résultant des gaz de fumée est ainsi efficacement évaporé sur le côté de l'installation où passe l'air.
PCT/DE1996/000845 1995-05-17 1996-05-07 Systeme de cheminee pour une chaudiere a condensation WO1996036840A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19518076A DE19518076C2 (de) 1995-05-17 1995-05-17 Schornsteinsystem für einen Brennwertkessel
DE19518076.3 1995-05-17

Publications (1)

Publication Number Publication Date
WO1996036840A1 true WO1996036840A1 (fr) 1996-11-21

Family

ID=7762134

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1996/000845 WO1996036840A1 (fr) 1995-05-17 1996-05-07 Systeme de cheminee pour une chaudiere a condensation

Country Status (2)

Country Link
DE (1) DE19518076C2 (fr)
WO (1) WO1996036840A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7363882B2 (en) 2002-09-09 2008-04-29 Comair Rotron, Inc. Condensation removal for use with a draft inducer
US20110247603A1 (en) * 2010-04-09 2011-10-13 Carrier Corporation Furnace Vent with Water-Permeable Inner Pipe
KR101647590B1 (ko) * 2015-03-19 2016-08-10 인하대학교 산학협력단 다공성 응축수 순환 폐열회수장치 및 그 장치를 구비한 보일러
US9750563B2 (en) 2009-09-22 2017-09-05 Mederi Therapeutics, Inc. Systems and methods for treating tissue with radiofrequency energy

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2384043B (en) * 2002-01-15 2005-04-27 Hepworth Heating Ltd Boiler arrangement
US20050252213A1 (en) * 2004-05-17 2005-11-17 Brown Fred A Condensation removal for use with a draft inducer
GB2422187B (en) 2005-09-27 2008-02-13 Zenex Technologies Ltd A flue, and a boiler including such a flue
DE202010013989U1 (de) * 2010-10-06 2011-01-20 Munters Euroform Gmbh Rohr und Leitelement zum Einbau in ein Rohr
DE102017105685B4 (de) 2017-03-16 2021-10-21 Pender Strahlungsheizung Gmbh Rückgewinnungsvorrichtung
AT525528A1 (de) * 2021-07-16 2023-04-15 Avl List Gmbh Abblasevorrichtung
DE102021006439A1 (de) 2021-12-28 2023-06-29 Burghard Tornau Rauchgaswärmenutzende, selbstreinigende Abgasanlage für Feststoffbrennöfen

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5852930A (ja) * 1981-09-25 1983-03-29 Matsushita Electric Ind Co Ltd 燃焼器具
GB2113366A (en) * 1982-01-09 1983-08-03 British Petroleum Co Plc Boiler
DE3442990A1 (de) * 1984-11-26 1986-05-28 Jacob Plein-Wagner Söhne Steinzeugwarenfabrik KG, 5522 Speicher Vorgefertigtes schornsteininnenrohrelement aus schamotte, beton o.dgl.
EP0190394A2 (fr) * 1984-09-18 1986-08-13 Robert Bosch Gmbh Ensemble d'installation avec un tuyau d'évacuation et un tuyau d'air frais

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2056825A1 (de) * 1970-11-19 1972-05-31 Hergt M Kombinationsverfahren zur Reinhaltung der Luft, Abgasverwertung und Abgasführung, insbesondere für Ölheizungsanlagen
DE3226913A1 (de) * 1982-07-19 1984-01-19 Schiedel GmbH & Co, 8000 München Schornstein mit gesonderter belueftung
FR2653544B1 (fr) * 1989-10-24 1992-02-14 Gaz De France Pompe a vapeur a echangeur air-produits de combustion a contre-courant sans fluide intermediaire.

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5852930A (ja) * 1981-09-25 1983-03-29 Matsushita Electric Ind Co Ltd 燃焼器具
GB2113366A (en) * 1982-01-09 1983-08-03 British Petroleum Co Plc Boiler
EP0190394A2 (fr) * 1984-09-18 1986-08-13 Robert Bosch Gmbh Ensemble d'installation avec un tuyau d'évacuation et un tuyau d'air frais
DE3442990A1 (de) * 1984-11-26 1986-05-28 Jacob Plein-Wagner Söhne Steinzeugwarenfabrik KG, 5522 Speicher Vorgefertigtes schornsteininnenrohrelement aus schamotte, beton o.dgl.

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 007, no. 137 (M - 222) 15 June 1983 (1983-06-15) *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7363882B2 (en) 2002-09-09 2008-04-29 Comair Rotron, Inc. Condensation removal for use with a draft inducer
US9750563B2 (en) 2009-09-22 2017-09-05 Mederi Therapeutics, Inc. Systems and methods for treating tissue with radiofrequency energy
US20110247603A1 (en) * 2010-04-09 2011-10-13 Carrier Corporation Furnace Vent with Water-Permeable Inner Pipe
US9103560B2 (en) * 2010-04-09 2015-08-11 Carrier Corporation Furnace vent with water-permeable inner pipe
KR101647590B1 (ko) * 2015-03-19 2016-08-10 인하대학교 산학협력단 다공성 응축수 순환 폐열회수장치 및 그 장치를 구비한 보일러

Also Published As

Publication number Publication date
DE19518076A1 (de) 1996-11-21
DE19518076C2 (de) 2000-05-04

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