EP1096200B1 - Echangeur mural pour foyer de chaudière - Google Patents
Echangeur mural pour foyer de chaudière Download PDFInfo
- Publication number
- EP1096200B1 EP1096200B1 EP00402678A EP00402678A EP1096200B1 EP 1096200 B1 EP1096200 B1 EP 1096200B1 EP 00402678 A EP00402678 A EP 00402678A EP 00402678 A EP00402678 A EP 00402678A EP 1096200 B1 EP1096200 B1 EP 1096200B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- heat exchanger
- tubes
- exchanger
- wall
- hearth
- 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
Links
Images
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
- F28F1/00—Tubular elements; Assemblies of tubular elements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22G—SUPERHEATING OF STEAM
- F22G3/00—Steam superheaters characterised by constructional features; Details of component parts thereof
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B21/00—Water-tube boilers of vertical or steeply-inclined type, i.e. the water-tube sets being arranged vertically or substantially vertically
- F22B21/22—Water-tube boilers of vertical or steeply-inclined type, i.e. the water-tube sets being arranged vertically or substantially vertically built-up from water tubes of form other than straight or substantially straight
- F22B21/30—Water-tube boilers of vertical or steeply-inclined type, i.e. the water-tube sets being arranged vertically or substantially vertically built-up from water tubes of form other than straight or substantially straight bent in U-loop form
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22G—SUPERHEATING OF STEAM
- F22G1/00—Steam superheating characterised by heating method
- F22G1/06—Steam superheating characterised by heating method with heat supply predominantly by radiation
Definitions
- the invention relates to a heat exchanger intended to be mounted on a vertical screen wall of a power plant boiler home electric, consisting of tubes extending in said vertical direction between a lower part of the exchanger and a high part of the exchanger and in which water vapor is circulated between an inlet of the tubes of the exchanger and an outlet from the exchanger tubes to be heated, each tube being bent in a U-turn at the top of the exchanger, the inlet and the outlet exchanger tubes being arranged in the lower part of the exchanger.
- Such a wall heat exchanger is more particularly intended for a boiler operating in natural or controlled circulation in which the walls of the boiler hearth consist of tubes through which an emulsion circulates water-water vapor.
- This wall heat exchanger is intended to recover energy heat available at high temperature at the top of the fireplace to heat water vapor which allows downstream of the boiler to reduce the surface of the steam superheater and superheater exchangers.
- the superheater 37 is composed of a plurality of groups of tubes 40 spaced from each other, each group comprising some tubes 40 aligned in a plane and forming a panel extending perpendicular to the walls.
- the present invention proposes to improve the arrangement of such a exchanger.
- the subject of the invention is therefore a heat exchanger, intended to be mounted on a vertical screen wall of a central heating boiler production of electrical energy, consisting of tubes extending along said vertical direction between a lower part of the exchanger and an upper part of the exchanger and in which water vapor is circulated between a inlet of the exchanger tubes and an outlet of the exchanger tubes to be heated, each tube being bent in a U-turn at the top of the exchanger, the inlet and outlet of the exchanger tubes being arranged in lower part of the exchanger, characterized in that the exchanger tubes are aligned in a plane, parallel to the screen wall, and form individually or in small groups alternating ascending circuits and circuits descendants.
- the exchanger placed parallel to the screen wall masks this screen wall and the heat exchange between the hot gases at the top of the hearth is done for the benefit of the exchanger and not for the benefit of the tubes of the screen wall.
- the lower part of the exchanger is rigidly fixed to the fire screen wall and the upper part of the heat exchanger is slidably fixed to the screen wall in said vertical direction.
- the alternating arrangement of rising circuits and circuits descendants avoids too large temperature gradients between tubes adjacent to limit their deformation under the effect of stresses thermal. This arrangement is particularly advantageous when the tubes are assembled to form nested tube panels. If the exchanger consists of tube panels, it is possible to increase the size of the fins between the vertical tubes forming the screen wall because these are less subject to radiation from the home and this results in a simplification of the design of the upper part of the fireplace.
- Figure 1 very schematically illustrates a central heating boiler production of electrical energy with a fireplace provided in its upper part wall heat exchangers according to the invention.
- FIG 2 very schematically shows a wall-mounted heat exchanger on a screen wall of the fireplace illustrated in Figure 1.
- FIGS 3 and 4 illustrate the alternation of rising circuits and descendants of an exchanger according to the invention.
- Figure 5 is a partial view showing part of a screen wall composed of tubes and part of an exchanger according to the invention, and showing the sliding link, in the upper part, of the exchanger on the screen wall.
- the hearth 1 of a steam generating boiler for a power plant which can be a vaulted ball boiler or conventional balloon, is of a classic design based on tubes in which circulates a water-steam emulsion.
- the vertical screen walls at the top of the fireplace are fitted with heat exchangers thermal such as 5 and 6, each called thereafter wall-mounted exchanger.
- each wall heat exchanger as 5 is secured to a screen wall adjacent M and consists of tubes such as 7 aligned in a plane, parallel to the screen wall M, and extending in the vertical direction between a lower part B of the exchanger and an upper part H of the exchanger.
- tubes such as 7 aligned in a plane, parallel to the screen wall M, and extending in the vertical direction between a lower part B of the exchanger and an upper part H of the exchanger.
- water vapor is circulated between an inlet E of the exchanger tubes and an outlet S of the exchanger tubes to be heated.
- each tube 7 is bent in a U-turn at the top of the exchanger and the inlet E and the outlet S of the exchanger tubes are partly arranged bottom of the exchanger.
- the bending of the tubes 7 can also be carried out outside of the hearth in which case a watertight device must be provided allowing the tubes to expand relative to the ceiling P of the fireplace. It can also be done at the interior of the fireplace as illustrated in Figure 1 which simplifies
- the lower part B of the exchanger 5 is rigidly fixed to the adjacent wall M for example by fixed points 8, 9 between the tubes 11 (FIG. 5) of the screen wall M and the exchanger tubes 5.
- the upper part H of the exchanger is fixed to the wall screen sliding in the vertical direction using at least one collar as 10 more visible in Figure 5, attached to at least one vertical tube 7 of the exchanger and in which is slidably engaged at least one vertical tube 11 of the screen wall M.
- collars such as 10 can be spaced along the tubes 7 of the exchanger in the vertical direction as illustrated in FIG. 2.
- the tubes 7 of the exchanger are aligned in a vertical plane and form individually ( Figure 3) or in small groups or layers ( Figure 4), an alternation of rising circuits and circuits descendants illustrated by arrows.
- the tubes 7 are assembled to form nested panels of tubes such as 12 and 13, the assembly of the contiguous tubes constituting the panels of the exchanger being conventionally produced by vertical fins (not illustrated in the drawings) welded between contiguous tubes. With this construction, the assembled tubes do not not pass through the ceiling P of fireplace 1.
- the construction of a wall exchanger according to the invention contributes to reinforce the reliability of the exchanger and its resistance over time and therefore reduce home maintenance costs.
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)
Description
Claims (4)
- Echangeur thermique (5,6), destiné à être monté sur un mur écran vertical (M) d'un foyer (1) de chaudière de centrale de production d'énergie électrique, constitué de tubes (7) s'étendant suivant ladite direction verticale entre une partie basse (B) de l'échangeur et une partie haute (H) de l'échangeur et dans lesquels de la vapeur d'eau est mise en circulation entre une entrée (E) des tubes de l'échangeur et une sortie (S) de tubes de l'échangeur pour être réchauffée, chaque tube étant coudé en demi-tour en partie haute de l'échangeur, l'entrée (E) et la sortie (S) des tubes de l'échangeur étant disposées en partie basse de l'échangeur, caractérisé en ce que les tubes (7) de l'échangeur sont alignés dans un plan, parallèlement au mur écran (M), et forment individuellement ou par petits groupes une alternance de circuits montants et de circuits descendants.
- Echangeur selon la revendication 1, dans lequel les tubes sont assemblés pour former des panneaux de tubes (12,13) imbriqués.
- Foyer de chaudière de centrale de production d'énergie électrique comprenant au moins un mur écran vertical (M) sur lequel est solidarisé un échangeur (5,6) selon l'une des revendications 1 ou 2 et dans lequel la partie basse (B) de l'échangeur est fixée rigidement au mur et la partie haute (H) de l'échangeur est fixée au mur de façon coulissante suivant ladite direction verticale.
- Foyer selon la revendication 3, dans lequel l'échangeur ne traverse pas le plafond (P) du foyer.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9913525A FR2800440B1 (fr) | 1999-10-28 | 1999-10-28 | Echangeur mural, pour foyer de chaudiere, constitue de tubes dont l'entree et la sortie sont situees dans la partie basse de l'echangeur |
FR9913525 | 1999-10-28 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1096200A1 EP1096200A1 (fr) | 2001-05-02 |
EP1096200B1 true EP1096200B1 (fr) | 2004-03-24 |
Family
ID=9551495
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00402678A Expired - Lifetime EP1096200B1 (fr) | 1999-10-28 | 2000-09-28 | Echangeur mural pour foyer de chaudière |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1096200B1 (fr) |
KR (1) | KR20010067361A (fr) |
DE (1) | DE60009230T2 (fr) |
ES (1) | ES2214235T3 (fr) |
FR (1) | FR2800440B1 (fr) |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1084205A (fr) * | 1952-04-28 | 1955-01-18 | Babcock & Wilcox France | Perfectionnements aux groupes d'évaporation et de surchauffe |
US3312198A (en) * | 1965-12-23 | 1967-04-04 | Combustion Eng | Steam generator having improved steam heating sections arranged for parallel flow |
EP0075041B1 (fr) * | 1981-09-15 | 1986-03-05 | GebràDer Sulzer Aktiengesellschaft | Générateur de vapeur avec une paroi tubulaire de surchauffe |
-
1999
- 1999-10-28 FR FR9913525A patent/FR2800440B1/fr not_active Expired - Fee Related
-
2000
- 2000-09-28 DE DE60009230T patent/DE60009230T2/de not_active Expired - Lifetime
- 2000-09-28 ES ES00402678T patent/ES2214235T3/es not_active Expired - Lifetime
- 2000-09-28 EP EP00402678A patent/EP1096200B1/fr not_active Expired - Lifetime
- 2000-10-27 KR KR1020000063407A patent/KR20010067361A/ko not_active Application Discontinuation
Also Published As
Publication number | Publication date |
---|---|
DE60009230D1 (de) | 2004-04-29 |
KR20010067361A (ko) | 2001-07-12 |
DE60009230T2 (de) | 2005-04-14 |
ES2214235T3 (es) | 2004-09-16 |
FR2800440A1 (fr) | 2001-05-04 |
FR2800440B1 (fr) | 2001-11-30 |
EP1096200A1 (fr) | 2001-05-02 |
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