EP0411112B1 - Echangeur de chaleur - Google Patents

Echangeur de chaleur Download PDF

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Publication number
EP0411112B1
EP0411112B1 EP90904267A EP90904267A EP0411112B1 EP 0411112 B1 EP0411112 B1 EP 0411112B1 EP 90904267 A EP90904267 A EP 90904267A EP 90904267 A EP90904267 A EP 90904267A EP 0411112 B1 EP0411112 B1 EP 0411112B1
Authority
EP
European Patent Office
Prior art keywords
heat exchanger
clean gas
side walls
exchanger according
flow channels
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.)
Expired - Lifetime
Application number
EP90904267A
Other languages
German (de)
English (en)
Other versions
EP0411112A1 (fr
Inventor
Dieter Wallstein
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.)
WALLSTEIN Dieter
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0411112A1 publication Critical patent/EP0411112A1/fr
Application granted granted Critical
Publication of EP0411112B1 publication Critical patent/EP0411112B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • F28D21/0005—Recuperative heat exchangers the heat being recuperated from exhaust gases for domestic or space-heating systems
    • F28D21/0008—Air heaters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F19/00—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers
    • 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
    • F28F21/006—Constructions of heat-exchange apparatus characterised by the selection of particular materials of glass

Definitions

  • the invention relates to a heat exchanger for cooling hot raw gas with aggressive constituents and for heating the raw gas cleaned to clean gas
  • the housing of which is formed by two side walls and an upper and a lower tube sheet, the side walls being assigned inside to form flow channels and in the ends of a multiplicity of exchanger tubes arranged parallel to one another and to the side walls are inserted in the upper and lower tube sheets, and the hot raw gas flows through the exchanger tubes and the clean gas through the housing transversely to the exchanger tubes and the housing and the partition walls are preferably made of highly corrosion-resistant metal sheets and the exchanger tubes are preferred are made of glass.
  • Such heat exchangers are used in particular in exhaust gas cleaning systems.
  • DE-A-35 34 822 shows a glass tube heat exchanger in which the regions of the clean gas duct which are adjacent to the side walls are acted upon by a heated liquid heat transfer medium.
  • an external heating device is used in the start-up phase of the heat exchanger, a circuit of the liquid heat transfer medium being maintained by means of a pump.
  • the liquid heat transfer medium can also be heated by the flue gas which flows through tubes which are arranged areas of the clean gas duct assigned to the side walls.
  • the additional liquid heat transfer medium results in a comparatively complicated apparatus structure for the glass tube heat exchanger described above.
  • the invention has for its object to improve a heat exchanger of the generic type in such a way that the desired heating of the side walls and thus a safe avoidance of corrosive condensations is ensured with comparatively little equipment.
  • the clean gas outlet of the heat exchanger is connected to the flow channels of the two side walls via at least one clean gas line at the level of the clean gas inlet into the heat exchanger.
  • the invention follows the guiding principle of leading clean gas heated up again by the heat exchanger through the flow channels along the side walls, ie two partial flows are removed from the heated clean gas in the clean gas outlet of the heat exchanger and returned to the flow channels on the side walls.
  • the side walls and also their partitions used to form the flow channels become exclusive charged with clean gas, so that the risk of corrosion is reduced or eliminated in comparison to technical solutions in which these flow channels are exposed to flue gas or raw gas.
  • the clean gas lines can open into the upper and / or lower areas of the flow channels, in each case in adaptation to the existing conditions.
  • corresponding branch lines are provided in the case of a junction both in the upper and in the lower area of the flow channels.
  • the clean gas lines are returned in the direction of the clean gas inlet of the heat exchanger, so that the branched clean gas flows flow through the flow channels in the same direction as the clean gas to be heated.
  • the flow channels are provided on the end face with outlet openings for the returned clean gas, so that this is added to the heated clean gas again at the outlet of the heat exchanger.
  • the mouthpieces of the clean gas lines on both sides can be different in cross-section and / or shape and / or position for the upper and / or lower regions of the flow channels, so that an optimal adaptation to the existing requirements can be made.
  • the flow channels advantageously extend over the entire depth of the side walls and their partitions, so that these are acted upon over the entire surface and thus a uniform temperature distribution is ensured.
  • the heaters may be one heater in each of the clean gas lines in order to possibly reheat the recycled clean gas, depending on whether this should prove expedient due to the local conditions.
  • a temperature detection element for example a temperature sensor.
  • a fan can also be present in the clean gas lines, which can advantageously be regulated depending on the need for volume and pressure.
  • the arrangement of such fans can be expedient if the performance of the existing clean gas blower should not be sufficient for the return of the clean gas into the flow channels.
  • the clean gas lines with throttle valves or the like. be equipped.
  • the housing of the heat exchanger is formed by the two side walls 3, which simultaneously represent the outer walls, and an upper and lower tube plate 8, 9.
  • the side walls 3 14 are assigned inside to form flow channels 14 partition walls 2.
  • the ends of a multiplicity of exchanger tubes 1 arranged parallel to one another and to the side walls 3 are inserted into the upper and lower tube sheets 8, 9.
  • the hot raw gas flows through the exchanger tubes 1, while the cleaned clean gas flows through the housing of the heat exchanger transverse to the exchanger tubes 1.
  • the side walls 3 and the partitions 2 and the upper and lower tube sheets 8, 9 are preferably made of highly corrosion-resistant sheets, while the exchanger tubes 1 are preferably made of glass. However, it is also possible to manufacture them from graphite or plastic, for example.
  • the clean gas outlet of the heat exchanger is connected to the flow channels 14 of the two side walls 3 via at least one clean gas line 4 each.
  • part of the heated clean gas, which leaves the heat exchanger is returned via its inlet openings 13 into the flow channels 14 between the side walls 3 and the partition walls 2, so that the side walls 3 and the partition walls are heated with a uniform temperature distribution.
  • the clean gas lines 4 open into the upper and lower regions of the flow channels 14, specifically the upper clean gas inlet into the flow channels 14 is denoted by 12 and the lower clean gas inlet is denoted by 11.
  • the flow channels 14 have outlet openings 10 for the returned clean gas on the end face, so that this is introduced again into the clean gas outlet of the heat exchanger and is discharged with the main stream of the clean gas, for example to a chimney.
  • the flow channels 14 for the branched-off clean gas extend over the entire depth of the side walls 3 and their partitions 2, so that a full-surface exposure and thus uniform temperature distribution is ensured.
  • Heaters 5 are present in the clean gas lines 4, so that intermediate heating of the two branched clean gas streams can be carried out if necessary.
  • the control is advantageously carried out via temperature detection elements 7, for example in Form of temperature sensors.
  • Fans 6 can also be arranged in the clean gas lines 4, which fans can advantageously be regulated depending on the need for volume and pressure.
  • the fans 6 can be dispensed with if the power of the existing clean gas blower is sufficient to also convey the two branched clean gas streams through the flow channels 14 via the clean gas lines 4.
  • Throttle valves 15 or the like are in the clean gas lines 4. provided so that control of the returned clean gas flows can be carried out.
  • the inventive design of a heat exchanger is no longer used to heat the partition walls 2 and the side walls 3, as in the prior art, the very aggressive and contaminated raw gas, but the cleaned, cleaned from aggressive components and already heated clean gas.

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  • 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)
  • Separation By Low-Temperature Treatments (AREA)

Claims (10)

  1. Echangeur de chaleur pour le refroidissement de gaz brut chaud contenant des substances agressives et pour le réchauffage du gaz brut transformé par épuration en gaz épuré, échangeur dont l'enveloppe est constituée par deux parois latérales (3) et par une plaque tubulaire supérieure (8) et une plaque tubulaire inférieure (9), des parois de séparation (2) étant associées aux parois latérales (3), côté intérieur, pour former des canaux d'écoulement (14) et les extrémités d'une pluralité de tubes échangeurs (1) parallèles entre eux et parallèles aux parois latérales (3) étant engagés dans les plaques tubulaires supérieure (8) et inférieure (9), le gaz brut chaud circulant à l'intérieur des tubes échangeurs (1) et le gaz épuré circulant à l'intérieur de l'enveloppe transversalement aux tubes échangeurs (1), et l'enveloppe et les parois de séparation (2) étant réalisées de préférence en tôle résistant à la corrosion et les tubes échangeurs (1) étant réalisés de préférence en verre, caractérisé par le fait que la sortie de l'échangeur pour le gaz épuré communique avec les canaux d'écoulement (14) des deux parois latérales (3) chaque fois par au moins une conduite de gaz épuré (4) située au niveau de l'entrée du gaz épuré dans l'échangeur de chaleur.
  2. Echangeur de chaleur selon la revendication 1, caractérisé par le fait que les conduites de gaz épuré (4) débouchent dans les parties supérieures et/ou inférieures des canaux d'écoulement (14).
  3. Echangeur de chaleur selon la revendication 1 ou 2, caractérisé par le fait que les canaux d'écoulement (14) comportent côté frontal des orifices de sortie (10) pour le gaz épuré recyclé.
  4. Echangeur de chaleur selon la revendication 1 ou l'une des revendications précédentes, caractérisé par le fait que les embouchures des conduites de gaz épuré (4) des deux côtés, pour les parties supérieures et/ou inférieures des canaux d'écoulement (14), ont une section et/ou une forme et/ou une position différente.
  5. Echangeur de chaleur selon la revendication 1 ou l'une des revendications précédentes, caractérisé par le fait que les canaux d'écoulement (14) s'étendent sur l'ensemble de la profondeur des parois latérales (3) et des parois de séparation (2).
  6. Echangeur de chaleur selon la revendication 1 ou l'une des revendications précédentes, caractérisé par le fait que des moyens de chauffage (5) sont disposés dans les conduites (4) de gaz épuré.
  7. Echangeur de chaleur selon la revendication 6, caractérisé par le fait que les moyens de chauffage (5) sont commandés par des organes de mesure de la température (7).
  8. Echangeur de chaleur selon la revendication 1 ou l'une des revendications précédentes, caractérisé par le fait qu'il est prévu des soufflantes (6) dans les conduites (4) de gaz épuré.
  9. Echangeur de chaleur selon la revendication 8, caractérisé par le fait que les soufflantes (6) peuvent être réglées en volume et en pression en fonction de la demande.
  10. Echangeur de chaleur selon la revendication 1 ou l'une des revendications précédentes, caractérisé par le fait que les conduites (4) de gaz épuré sont équipées de vannes d'étranglement (15) à papillon ou analogues.
EP90904267A 1989-02-20 1990-02-19 Echangeur de chaleur Expired - Lifetime EP0411112B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE3905140 1989-02-20
DE3905140A DE3905140A1 (de) 1989-02-20 1989-02-20 Waermetauscher
PCT/EP1990/000267 WO1990009555A1 (fr) 1989-02-20 1990-02-19 Echangeur de chaleur

Publications (2)

Publication Number Publication Date
EP0411112A1 EP0411112A1 (fr) 1991-02-06
EP0411112B1 true EP0411112B1 (fr) 1994-06-15

Family

ID=6374505

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90904267A Expired - Lifetime EP0411112B1 (fr) 1989-02-20 1990-02-19 Echangeur de chaleur

Country Status (4)

Country Link
EP (1) EP0411112B1 (fr)
AT (1) ATE107409T1 (fr)
DE (2) DE3905140A1 (fr)
WO (1) WO1990009555A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4030250A1 (de) * 1990-09-25 1992-03-26 Dieter Dipl Ing Wallstein Waermetauscher
FR2702831B1 (fr) * 1993-03-17 1995-05-24 Faudat Procédé et dispositif de refroidissement de l'enceinte d'un échangeur thermique.
CN112728974A (zh) * 2021-01-04 2021-04-30 洛阳瑞昌环境工程有限公司 一种防积灰堵塞玻璃管换热器及其应用

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE315672C (fr) *
GB495093A (en) * 1936-03-23 1938-11-04 Hugh Harford Improvements in gas fired geyser type water heaters
IT1210975B (it) * 1981-01-12 1989-09-29 Luigi Benito Trojani Preriscaldatore di aria, a recupero di calore, dai fumi di scarico in camini e simili.
DE3142485C2 (de) * 1981-10-27 1983-11-17 Langbein & Engelbracht GmbH & Co KG, 4630 Bochum Glasrohrwärmetauscher
DE3333057C1 (de) * 1983-09-14 1985-04-18 Peter Kaehmann Glasrohr-Waermetauscher
DE3534822A1 (de) * 1985-09-30 1987-04-16 Langbein & Engelbrecht Glasrohrwaermetauscher

Also Published As

Publication number Publication date
DE59006114D1 (de) 1994-07-21
DE3905140A1 (de) 1990-08-23
EP0411112A1 (fr) 1991-02-06
WO1990009555A1 (fr) 1990-08-23
ATE107409T1 (de) 1994-07-15

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