EP0279035A1 - Wärmetauscher mit von Rauchgas durchströmten Rohren - Google Patents

Wärmetauscher mit von Rauchgas durchströmten Rohren Download PDF

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Publication number
EP0279035A1
EP0279035A1 EP87117121A EP87117121A EP0279035A1 EP 0279035 A1 EP0279035 A1 EP 0279035A1 EP 87117121 A EP87117121 A EP 87117121A EP 87117121 A EP87117121 A EP 87117121A EP 0279035 A1 EP0279035 A1 EP 0279035A1
Authority
EP
European Patent Office
Prior art keywords
heat exchanger
guide vanes
sections
rod
tubes
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Withdrawn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
EP87117121A
Other languages
German (de)
English (en)
French (fr)
Inventor
Rolf Dr. Noack
Walter Habig
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.)
Omnical GmbH
Original Assignee
Omnical GmbH
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 Omnical GmbH filed Critical Omnical GmbH
Publication of EP0279035A1 publication Critical patent/EP0279035A1/de
Withdrawn legal-status Critical Current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
    • F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
    • F28F13/06—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media
    • F28F13/12—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media by creating turbulence, e.g. by stirring, by increasing the force of circulation
    • F28F13/125—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media by creating turbulence, e.g. by stirring, by increasing the force of circulation by stirring
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28G—CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
    • F28G1/00—Non-rotary, e.g. reciprocated, appliances
    • F28G1/08—Non-rotary, e.g. reciprocated, appliances having scrapers, hammers, or cutters, e.g. rigidly mounted

Definitions

  • the invention relates to a heat exchanger with pipes through which flue gas flows, with the features of the preamble of claim 1.
  • Such a heat exchanger known from DE-AS 11 00 855 counteracts the phenomenon that a slow jacket flow at reduced temperature and a fast flowing core flow of high temperature would quickly form in hot gases flowing through a tube.
  • the specially designed guide vanes arranged on the rod ensure that parts of the hot flow core are repeatedly introduced into the flow jacket at high speed.
  • the flow jacket is thereby warmed up and accelerated and can thus again effectively exchange heat with the surface of the heat exchanger.
  • This multiple exchange effect causes the gas to exit the heat exchanger at a uniform rate and temperature without significant flow resistance.
  • the invention has for its object to improve the generic heat exchanger in terms of increased heat transfer and increased smoke gas resistance.
  • the arrangement of a second row of guide vanes in the form of a second screw thread improves the mixing of the gas streams which occur in the tubes, which manifests itself in an increased heat transfer with a certain increase in the flow resistance. This increased resistance creates a more even load on the downstream heating surfaces. Since the rods provided with the guide vanes can be raised and lowered and also serve to clean the pipes, the stroke of the rods can be reduced due to the denser fins, which reduces the height of the heat exchanger can be.
  • the heat exchanger shown forms the secondary heating surface of a solid boiler which is only partially reproduced.
  • the boiler contains a wall 2 surrounded by external insulation 1, a boiler ceiling 3, a filling funnel 4 for the solid fuel, a combustion chamber 5, the heat exchanger 6 described in more detail below as a secondary heating surface and a flue gas exhaust pipe 7.
  • the wall 2 of the boiler is designed as a double wall , wherein the space 8 is flowed through by water.
  • the heat exchanger 6 contains vertically arranged tubes 9, which are connected to the combustion chamber 5 and thus have flue gas flowing through them.
  • the tubes 9 are held in two tube plates 10, 11, one of which forms the end of the combustion chamber 5.
  • the space formed between the tube plates 10, 11 outside the tubes 9 is filled with water and serves as a water space 13.
  • the water space 13 is connected to the space 8 inside the wall 2 on the water side and is connected to a water inlet and a water outlet.
  • the insert acting as a turbulator is suspended in each tube 9 of the heat exchanger 6.
  • the insert consists of a rod 14 which tapers conically towards the lower end.
  • the rod 14 is surrounded by two rows of guide vanes 15, 15 ⁇ in the form of a two-start screw.
  • the rod 14 and the guide vanes 15, 15 ⁇ are cast from one piece.
  • the guide vanes 15, 15 ⁇ consist of flat, oblique arranged sections 16, which move the rod 14 helically.
  • the obliquely arranged sections 16 are connected to one another by flat, axially running sections 17.
  • the inclined sections 16 have cutouts 18 in the edge region at the transition into the axially extending section 17.
  • the inclination of the inclined sections 16 with respect to the vertical is approximately 35 degrees in order to ensure that the dust particles entrained by the flue gas can slip off.
  • One row of the guide vanes 15 is offset by 180 degrees from the other row 15 Anlagen, the cutouts 18 of each row of guide vanes 15, 15 ⁇ being in the same radial plane.
  • the central gas flow flowing through a pipe 9 is directed outward through the oblique section 16 of the guide vanes 15, 15 ⁇ and mixed into the jacket flow present there. Through the cutouts 18, the gas can spread over the entire cross section of the tube 9 before it is led outward again through the subsequent inclined sections 16.
  • the rods 14 are provided at the upper end with a bore 19 through which a rod 20 is guided.
  • the rod 20 is fastened to a lifting frame 21 which is arranged within the gas collecting space 12 and can be raised and lowered via a drive 22.
  • the rods 14 of a row of tubes 9 are connected by a rod 20.
  • Two lifting frames 21 are arranged in the longitudinal direction of the gas collecting space 12 and are moved in opposite directions.
  • the stroke of the lifting frame 21 is approximately 70 mm and thus corresponds to 5 to 10% of the length of the rod 14.
  • the lifting of the rods 14 serves to clean the tubes 9 and is carried out intermittently depending on the amount of fuel burned. Due to the double arrangement of the guide vanes 15, 15 ⁇ , the density of the ribbing can be increased, so that the lifting height can be reduced compared to a simple guide vane arrangement with the same cleaning effect. The reduction in the lifting height also means a lower height of the gas collecting space 12 and thus the overall height of the boiler.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
EP87117121A 1987-02-04 1987-11-20 Wärmetauscher mit von Rauchgas durchströmten Rohren Withdrawn EP0279035A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19873703302 DE3703302A1 (de) 1987-02-04 1987-02-04 Waermetauscher mit von rauchgas druchstroemten rohren
DE3703302 1987-02-04

Publications (1)

Publication Number Publication Date
EP0279035A1 true EP0279035A1 (de) 1988-08-24

Family

ID=6320184

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87117121A Withdrawn EP0279035A1 (de) 1987-02-04 1987-11-20 Wärmetauscher mit von Rauchgas durchströmten Rohren

Country Status (2)

Country Link
EP (1) EP0279035A1 (enrdf_load_stackoverflow)
DE (1) DE3703302A1 (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104457392A (zh) * 2014-09-01 2015-03-25 无锡特莱姆气体设备有限公司 一种具有扰流功能的汽化器
CN107121008A (zh) * 2017-06-20 2017-09-01 中国大唐集团科学技术研究院有限公司华东分公司 针对开式循环水系统的凝汽器清洗装置及清洗导向装置

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19510612A1 (de) * 1995-03-23 1996-09-26 Broetje August Gmbh & Co Wärmeerzeuger mit Verdrängungskörper
DE19718064B4 (de) * 1997-04-29 2005-02-10 Behr Gmbh & Co. Kg Turbulenzeinlage
CN105371671A (zh) * 2015-11-10 2016-03-02 南京华夏壹泰节能科技有限公司 一种模块化低流阻导流式挂件
CN106643267A (zh) * 2016-12-27 2017-05-10 苏州博墨热能产品有限公司 烟气扰流管

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB486248A (en) * 1937-04-16 1938-06-01 Coventry Radiator & Presswork Coolers for oils or similar viscous liquids
DE1100855B (de) * 1953-04-24 1961-03-02 Andre Vandevelde Vorrichtung zum Waermeaustausch zwischen einem Rauchgasstrom und einer zu erhitzenden Fluessigkeit
GB899785A (en) * 1960-10-28 1962-06-27 Andre Vandevelde Turbulence generating element for heat exchangers
FR1508224A (fr) * 1966-11-21 1968-01-05 Hispano Suiza Sa Perfectionnements apportés aux appareils d'échanges thermiques à faisceau tubulaire
FR2255097A1 (enrdf_load_stackoverflow) * 1973-12-24 1975-07-18 Agfa Gevaert Ag
FR2436959A1 (fr) * 1978-09-19 1980-04-18 Ferodo Sa Perfectionnements apportes aux echangeurs de chaleur tubulaires et aux agitateurs destines a de tels echangeurs
GB2050183A (en) * 1979-05-25 1981-01-07 Ferodo Sa Tubular heat exchanger and helical agitators for use with such exchangers

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1707812A (en) * 1929-04-02 Hot-wateb heatek
DE624116C (de) * 1932-01-22 1936-01-13 Maria Hermanns Geb Fischer Feuerungseinbau mit Rauchgasfuehrung in der Laengsrichtung von aussen beheizten Roehren
US2077776A (en) * 1935-12-13 1937-04-20 Schmitt Edmund Insert for boiler and heater flues
DE8617733U1 (de) * 1986-06-30 1986-08-07 Joh. Vaillant Gmbh U. Co, 5630 Remscheid Kondensationswärmetauscher

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB486248A (en) * 1937-04-16 1938-06-01 Coventry Radiator & Presswork Coolers for oils or similar viscous liquids
DE1100855B (de) * 1953-04-24 1961-03-02 Andre Vandevelde Vorrichtung zum Waermeaustausch zwischen einem Rauchgasstrom und einer zu erhitzenden Fluessigkeit
GB899785A (en) * 1960-10-28 1962-06-27 Andre Vandevelde Turbulence generating element for heat exchangers
FR1508224A (fr) * 1966-11-21 1968-01-05 Hispano Suiza Sa Perfectionnements apportés aux appareils d'échanges thermiques à faisceau tubulaire
FR2255097A1 (enrdf_load_stackoverflow) * 1973-12-24 1975-07-18 Agfa Gevaert Ag
FR2436959A1 (fr) * 1978-09-19 1980-04-18 Ferodo Sa Perfectionnements apportes aux echangeurs de chaleur tubulaires et aux agitateurs destines a de tels echangeurs
GB2050183A (en) * 1979-05-25 1981-01-07 Ferodo Sa Tubular heat exchanger and helical agitators for use with such exchangers

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104457392A (zh) * 2014-09-01 2015-03-25 无锡特莱姆气体设备有限公司 一种具有扰流功能的汽化器
CN104457392B (zh) * 2014-09-01 2017-07-04 无锡特莱姆气体设备有限公司 一种具有扰流功能的汽化器
CN107121008A (zh) * 2017-06-20 2017-09-01 中国大唐集团科学技术研究院有限公司华东分公司 针对开式循环水系统的凝汽器清洗装置及清洗导向装置

Also Published As

Publication number Publication date
DE3703302A1 (de) 1988-08-18
DE3703302C2 (enrdf_load_stackoverflow) 1989-05-03

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Inventor name: NOACK, ROLF, DR.

Inventor name: HABIG, WALTER