EP0706010A2 - Appareil de chauffage avec arrangement de buses - Google Patents

Appareil de chauffage avec arrangement de buses Download PDF

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Publication number
EP0706010A2
EP0706010A2 EP95115810A EP95115810A EP0706010A2 EP 0706010 A2 EP0706010 A2 EP 0706010A2 EP 95115810 A EP95115810 A EP 95115810A EP 95115810 A EP95115810 A EP 95115810A EP 0706010 A2 EP0706010 A2 EP 0706010A2
Authority
EP
European Patent Office
Prior art keywords
nozzle arrangement
feed
bodies
frame
combustion chamber
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
EP95115810A
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German (de)
English (en)
Other versions
EP0706010A3 (fr
EP0706010B1 (fr
Inventor
Heribert Posch
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.)
Individual
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Individual
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Publication of EP0706010A3 publication Critical patent/EP0706010A3/fr
Application granted granted Critical
Publication of EP0706010B1 publication Critical patent/EP0706010B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24B—DOMESTIC STOVES OR RANGES FOR SOLID FUELS; IMPLEMENTS FOR USE IN CONNECTION WITH STOVES OR RANGES
    • F24B5/00—Combustion-air or flue-gas circulation in or around stoves or ranges
    • F24B5/02—Combustion-air or flue-gas circulation in or around stoves or ranges in or around stoves
    • F24B5/021—Combustion-air or flue-gas circulation in or around stoves or ranges in or around stoves combustion-air circulation
    • F24B5/026—Supply of primary and secondary air for combustion

Definitions

  • the invention relates to a method for burning solid fuels in particular, and a corresponding device.
  • Solid fuels are used in many small systems as lockable fireplace inserts etc. for heating living spaces, whereby open operation is often also desired so that the visual experience of the open fire can be enjoyed.
  • Solid fuels such as wood waste, straw, combustible waste are burned on a large scale in industrial plants, whereby the focus is exclusively on energy generation and burning with the lowest possible emission of pollutants.
  • the flue gases of the primary exhaust are passed to the after-combustion chamber through several vertically adjacent nozzles, so that these nozzles have a reduction in their flow cross-section in the vertical direction of view.
  • each nozzle is formed by the distance between two feed bodies arranged vertically next to one another, which in the top view have an approximately triangular or frustoconical cross-section, with the tip to the combustion chamber and the base towards the afterburner.
  • feed bodies are hollow, and are supplied with secondary air and / or the flue gases of the primary exhaust gas recirculation system, and therefore have corresponding outlet openings in the region of their side faces towards the nozzles formed between them.
  • the supply body itself and the supply lines supplying it are produced from bent and welded steel sheets, during which the nozzle device holds together Frame in which the feed body and its supply lines are or are in contact with it and which they penetrate completely or partially, consists of one or more parts as molded bodies made of cast, refractory solid material such as refractory concrete, SIC ceramic, fireclay or the like .
  • the existing cavity can be undivided, and thus serve to supply either secondary air or flue gases from the secondary exhaust into the nozzle arrangement.
  • a supply body for the supply of secondary air and a supply body for the supply of flue gas from the secondary exhaust are always arranged side by side within the nozzle arrangement, which is achieved by connecting the respective supply bodies to the different supplies.
  • feed bodies themselves are either formed from an angularly bent front plate, which forms the tip of the feed body, and a base inserted into the open base, the outlet openings 26 being arranged in rows from the cavity enclosed thereby, preferably in the vicinity of this base, and be produced by punching etc. before bending the front plate.
  • corresponding extensions of the base can also project outward through these outlet openings, which results in a positive connection of the two parts.
  • the floor itself in the form of a flat U, the free-ending outer legs of which correspond in their angular position to the legs of the front plate, but have a smaller mutual distance.
  • a floor can be welded into the front panel so that its respective free-ended legs end at the same height, and the welds are placed on the bends of the floor. This leaves passage space between the welding points into the free distance between the freely ending legs of the front plate and the floor, which together form the outlet openings of the feed body.
  • the individual parts from which the feed bodies are made can be adjustable in their mutual distance from one another, the gap therebetween which has been changed thereby representing the outlet opening.
  • a feed body consisting of a V-shaped front part and a U-shaped base
  • a further, second base so that the three spaced and fastened parts separate two separate feed spaces, but this time one behind the other in the direction of flow through the nozzle arrangement , be created.
  • Their mutual distance and thus the size of the respective outlet openings is preferably set as a function of the residual oxygen content of the flue gases leaving the afterburner. This can be done via an automatic actuator such as a servo motor, or manually, by - for a single feed body or for the entire nozzle arrangement - this mutual distance e.g. can be adjusted using a screw thread.
  • this channel-like formation also prevents deposits such as dust, oxidation residues or the like on the Outlet openings, since these are constantly removed by the gases flowing along them. This largely prevents clogging of the outlet openings.
  • a tubular profile can follow the front, V-shaped front panel, the cross section of which corresponds approximately to the width of the front part at the rear end.
  • the pipe cross sections themselves and the hollow space formed by the front part and the closely spaced pipe then come into question as supply rooms for secondary air and the flue gases of the first exhaust gas recirculation systems.
  • outlet openings must of course also be provided in the pipe cross-section, preferably in the vicinity of the distance between the V-shaped front part and the pipe, but still within the half of the pipe profile facing the front part.
  • a front part which is not V-shaped, but preferably trapezoidal or semicircular, for example a halved tube profile.
  • a front part Arranged at a distance behind it can again be a U-shaped base, the free legs of which, in turn, do not run parallel to one another, but strive outward at an angle.
  • the advantage is that the firing material stored on these feed bodies in this case cannot easily fall into the very narrow cross section of the individual nozzles between the feed bodies and, on the other hand, the contact surface on the feed bodies is larger.
  • the size of the outlet openings can be adjusted relative to one another by adjusting the individual parts of the feed bodies.
  • the frame itself is preferably formed in one piece, but depending on the design, two or even more individual parts are necessary, the separating surface between two individual parts, either a plane can be perpendicular to the flow direction of the nozzle arrangement, or a plane parallel to it and perpendicular to the longitudinal direction of the feed body.
  • Such a molded frame is not only easier and cheaper to manufacture, but also has a thermal expansion that is approximately 100 times lower than that of fire-resistant steel sheet. This facilitates the installation of this frame in the opening e.g. in the rear wall of a corresponding heating device, but on the other hand, the much greater thermal expansion of the feed body compared to the frame practically no thermal expansion must be compensated.
  • This is preferably achieved in that in the longitudinal direction of the feed body the free, generally closed, end of the feed body does not lie opposite a boundary surface of the frame that is too close in the cold state. Rather, the feed bodies usually penetrate one - e.g. upper - leg of the frame completely, but end in the opposite - e.g. lower - leg either in a blind hole or also in a through opening of the frame, whereby even at ends in a blind hole there is a sufficient cold distance between the feed body and the bottom of the blind hole in the frame to be able to absorb the thermal expansion.
  • the corresponding recesses and openings in the frame when cold are significantly larger than the corresponding outer cross sections of the feed body.
  • this space can be separated by e.g. on the outer circumference of the molded body and the gap overlapping sleeve made of sheet steel, etc. are covered.
  • a particularly simple design of the nozzle arrangement is achieved if the supply bodies are used alternately for the supply of secondary air and flue gases from the secondary exhaust, and the supply lines for the two gases for this purpose on the one hand above or in the upper leg of the frame and on the other hand below or in the lower leg arranged of the frame and firmly connected to their respective associated feed bodies, preferably welded.
  • the entire structural units made of sheet steel and consisting of feed bodies and supply lines can be made in one piece and equipped with corresponding openings Simply insert the frame from above or below.
  • the one-piece construction of the frame only has to be dispensed with if the sleeves for covering the gap between the feed bodies and the corresponding recesses in the frame are already firmly connected to the feed bodies before the nozzle arrangement is assembled.
  • the one-piece design of the frame can be maintained if this frame - viewed from the top - does not completely enclose the feed body, but only on its front side, i.e. towards the combustion chamber, and in the area between the feed body, but not on it Back.
  • this would make it possible to simply push the feed body and thus the entire sheet steel parts of the nozzle arrangement into the corresponding recesses in the frame which are open at the rear, which also partially solves the problem of the gap in the cross-sectional representation of the feed body with respect to the frame, since in the case of a tight insertion in the cold state and subsequent heating, the strongly expanding steel sheet feed bodies automatically move partially out of the recesses of the frame, which open in a wedge-shaped manner towards the rear.
  • the nozzle effect of the nozzle arrangement can be further strengthened in that, in addition to the tapering of the nozzles in the horizontal plane, the overall curvature flow cross section is tapered in the vertical plane by the upper and lower legs of the frame is partially or wholly inclined from the combustion chamber side towards the inside of the frame towards the inside.
  • FIGS. 1 and 2 show solutions of a nozzle arrangement 7, in which the nozzle-shaped narrowing in the nozzle arrangement mainly takes place in a horizontal plane, as can best be seen in the supervision of FIGS. 1 and 2.
  • the individual nozzles are formed by the distance between the two adjacent feed bodies 24, 25 which is reduced in the top view in the direction of flow of the flue gases from the primary exhaust 14 to the afterburner 13.
  • These feed bodies as they are shown in detail in different designs, for example in FIG. 2, have an outer contour that widens in the direction of flow, so that the individual nozzles 40 are formed in between by placing several such inflow bodies next to one another.
  • the feed bodies 24, 25 thus have a preferably triangular or frustoconical cross-section when viewed from above, but semicircular or, for manufacturing reasons, circular cross-sections are also conceivable because of the use of simple or halved tubes.
  • the feed bodies 24 and 25 are each formed from an angularly curved, V-shaped front part, the base of which is closed by a base 28, that is to say a sheet-metal part welded or clamped there, as a result of which the cavity inside of the feed part is formed.
  • this cavity via which secondary air or the flue gases of the secondary exhaust are fed to the nozzle arrangement, has a plurality of outlet openings 26 in the rear part of the front plate, near the bottom 28, which are spaced in the longitudinal direction, which is also can act a more or less continuous slot along this floor.
  • the free ends of the front part 27 protrude rearward over the base 28 and should thus protrude into the afterburning space 13 in order to bring about a particularly good swirling and mixing of the individual components there when the gas mixture flows in.
  • the cavity inside the feed body is additionally divided into two cavities not connected to one another by a partition wall 44 again consisting of sheet metal and welded or spread in the plane of symmetry of the feed body.
  • a partition wall 44 again consisting of sheet metal and welded or spread in the plane of symmetry of the feed body.
  • the bottom representation of FIG. 2 shows a slightly different construction variant, the bottom 28 itself being again approximately U-shaped, but with a width slightly less than the width at the rear, open end of the V-shaped front part 27 two parts assembled so that the rear free ends of their legs end at approximately the same height, so there is a distance on both sides between the free end of the front part 27 and the free legs 28a, 28b of the bottom 28, which serves as an outlet opening 26 for the each gas to be supplied is used.
  • the connection between the base part 28 and the front part 27 can be formed approximately in the area of the respective bend of the base 28 by a correspondingly thick weld point 41 in depth, of which a large number are spaced apart in the longitudinal direction, as in FIG. 3 in a rear view of the bottom feed body of FIG. 2 shown. This results in a large number of outlet openings 26 between the individual welding points 41, which bring about a good mixing of the gas flowing out here with the flue gases in the nozzle 40.
  • the angular position of the free legs 28a, 28b either exactly parallel to the angular position of the free legs of the front part 27 or approximately towards their end also causes whether the outlet openings 26 are designed as simple openings or as nozzle-shaped openings.
  • the respective supply line 24a, 25a lies longitudinally on the upper or lower cross leg of the frame 29 or in a recess prefabricated there.
  • the supply bodies 24, 25 striving upwards or downwards from the supply line initially extend through correspondingly large passages 32 in this transverse leg of the frame 29 into the inner free space 45, which forms the actual nozzle arrangement 7, and reach it with its free one , generally closed end the opposite, lower or upper, cross leg of the frame 29.
  • the feed bodies 24, 25 protrude with their free ends into corresponding recesses 31, the cold ends of the feed bodies 24, 25 and the bottom of these depressions 31 remains at such a large distance that the longitudinal expansion of the feed body which occurs during heating can be easily absorbed.
  • the passages 32 and stiffeners 31 are also larger in cross-sectional shape than the feed bodies in the cold state.
  • the particularly large cracks in the cold state along the circumference between the feed bodies and the surrounding frame 29 are covered by a kind of collar in the form of a collar 33.
  • the collar 33 is usually also made of refractory steel sheet as the feed body, and may, but need not, be fixed to it. For example, such a collar can be placed loosely on the feed body, which greatly facilitates the assembly of the nozzle arrangement.
  • the nozzle-shaped narrowing which is shown in the solution according to FIG. 4, above all in the horizontal plane as shown in FIG. 4b, can be caused by a further nozzle-shaped narrowing due to the upper and lower legs of the frame 29 can be supported in a vertical plane.
  • the distance between the upper and lower legs of the frame 29 narrows, which as a rule begins at the depth, that is to say the width of FIG. 4c, in the flow direction of the flue gases in front of the feed body and usually ends only behind it in the area before as well as in the area after each other, whereby there is also a reduction in cross-section of the free space 45 of the frame 29 and thus of the nozzle arrangement 7 in the vertical direction.
  • the frame 29, as shown in FIGS. 4, is preferably cast in one piece. However, if the cuffs 33 are to be firmly connected to the feed bodies 24, 25 for manufacturing reasons, it is generally not possible to push the feed bodies through the one-piece frame 29 from above or below.
  • the frame 29 is either made of two separate parts 29a, 29b, which touch in a vertical center plane, as shown in the right part of FIG. 1.
  • Fig. 1 also shows on the right edge that - up to a certain width of the nozzle arrangement - it is also possible to supply only the flue gases from the secondary exhaust of the nozzle arrangement via the feed body 25, the secondary air 5, however, laterally, along the sides of the combustion chamber and through a corresponding passage 46 in the frame 29 at an angle into the nozzle arrangement or the subsequent afterburner 13.
  • FIG. 5 shows a feed body consisting of a V-shaped front part 27 and a tube behind it.
  • the flue gas recirculation 11 takes place, for example, in the cavity formed by the front part 27 and tube 48, and the Distance between the two parts is the outlet opening 26 for the flue gases of the return 11.
  • Further outlet openings 26 'for the secondary air are openings in the cross section of the tube 48, just outside the part of the tube cross section 48 covered by the front part 27, but still inside the half of the tube cross section facing this front part 27.
  • FIG. 6 shows a solution of the kind that is expedient when the nozzle arrangement 7 is positioned below the fuel 3, that is to say in the bottom of the combustion chamber 2:
  • a tubular profile 49 is in turn followed by a base 48 with a substantially U-shaped shape and free ends 28a, 28b which strive outwards at an angle. These free ends 28a, 28b protrude further into the nozzle 40 than half the tubular profile 49. Because of their position at an acute angle to the flow direction of the primary exhaust 14, they additionally act as a baffle plate and improve the mixing between the inflowing gas.
  • the size of the outlet openings 26 can be adjusted by changing the distance between the front part, in this case half the tubular profile 49, and the base 28.
  • the adjustment is made by screwing one of the parts along a threaded rod that runs approximately on the line of symmetry of the feed body and is firmly connected to the other part.
  • FIG. 7 Another somewhat different shape of the feed body, as can be used above all for vertical feed bodies, is shown in FIG. 7.
  • the feed body is formed similar to the representations in Fig. 2, but with an additional floor 28 ', so that between the front part 27, first floor 28 and second floor 28' two separate feed spaces for secondary air and the flue gas of the first exhaust gas recirculation 11 are formed.
  • the distance between at least the second floor 28 ', but preferably also the front part 27, can be adjusted by screwing these parts along a threaded rod which is firmly connected to the first floor 28.
  • a lever linkage etc. can also be used, which above all gives the possibility of jointly adjusting a plurality of feed bodies, for example over the entire nozzle arrangement 7.
  • the free legs 28a, 28b or 28'a, 28'b or 27a, 27b which run essentially parallel or preferably towards the free end to each other at an acute angle, over a sufficient distance next to each other lie, whereby the corresponding outlet openings 26 are formed channel-like.
  • the outflowing gases i.e. the secondary air 5 or the flue gas of the first flue gas recirculation 11
  • the outflowing gases are forced into a flow direction with which they flow into the flue gas of the primary exhaust 14 at an acute angle, and on account of their existing kinetic energy penetrate relatively far into the flow of the primary trigger 14, which causes thorough mixing.
  • a further improvement in the mixing results if the free legs 28'a, 28'b of the rearmost bottom 28 'protrude further outward than the corresponding free legs of the parts of the feed body 24 in front of them, since this free leg is inclined relative to the direction of flow of the primary trigger 14 this free end additionally acts as a kind of baffle, and causes an additional swirl at this point with mixing with the supplied gases.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Incineration Of Waste (AREA)
  • Combustion Of Fluid Fuel (AREA)
  • Percussion Or Vibration Massage (AREA)
EP95115810A 1994-10-06 1995-10-06 Appareil de chauffage avec arrangement de buses Expired - Lifetime EP0706010B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4435749A DE4435749C2 (de) 1994-10-06 1994-10-06 Heizvorrichtung für feste Brennstoffe
DE4435749 1994-10-06

Publications (3)

Publication Number Publication Date
EP0706010A2 true EP0706010A2 (fr) 1996-04-10
EP0706010A3 EP0706010A3 (fr) 1999-03-10
EP0706010B1 EP0706010B1 (fr) 2003-04-02

Family

ID=6530121

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95115810A Expired - Lifetime EP0706010B1 (fr) 1994-10-06 1995-10-06 Appareil de chauffage avec arrangement de buses

Country Status (3)

Country Link
EP (1) EP0706010B1 (fr)
AT (1) ATE236380T1 (fr)
DE (2) DE4435749C2 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2314916A3 (fr) * 2009-10-23 2013-09-04 Heribert Posch Ensemble de grille de combustion
EP2434215A3 (fr) * 2010-09-28 2013-09-04 Heribert Posch Grille de combustion
EP3343106A1 (fr) * 2016-12-29 2018-07-04 Heribert Posch Déclencheur primaire pourvu d'espace à écoulement tourbillonnaire inversé

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10148686C1 (de) * 2001-10-02 2003-07-10 Heribert Posch Brennvorrichtung
DE102011117950B4 (de) 2011-11-08 2014-09-25 Heribert Posch Primärabzug für eine Heizvorrichtung für feste Brennstoffe sowie ein Verfahren zum Erstellen eines Primärabzugs
DE102017117097B4 (de) 2017-07-28 2019-10-17 Heribert Posch Primärabzug für feste Brennstoffe sowie Heizvorrichtung mit diesem Primärabzug

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE40801C (de) * J. E. GROSSE in Gröditz, Sachsen Luftzuführung an Stubenöfen
US2965052A (en) * 1960-12-20 Method for obtaining a complete
DE430281C (de) * 1923-05-15 1926-06-14 Carl Immenkamp Feuerung fuer Heizoefen
GB2072831A (en) * 1980-03-26 1981-10-07 Towler M O Supplying secondary combustion air
DK148123C (da) * 1980-12-02 1985-08-05 Passat 81 A S Centralvarmekedel med efterbraender
DE3125429A1 (de) * 1981-06-27 1983-02-03 Erk Eckrohrkessel Gmbh, 1000 Berlin "einrichtung zur durchmischung von gasstraehnen"
DE9201234U1 (de) * 1992-02-01 1992-04-16 Buderus Heiztechnik GmbH, 6330 Wetzlar Heizvorrichtung für feste Brennstoffe
EP0641969B1 (fr) * 1993-09-07 1996-02-28 Heribert Posch Dispositif de combustion pour bois, charbon et biomasse

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2314916A3 (fr) * 2009-10-23 2013-09-04 Heribert Posch Ensemble de grille de combustion
EP2434215A3 (fr) * 2010-09-28 2013-09-04 Heribert Posch Grille de combustion
EP3343106A1 (fr) * 2016-12-29 2018-07-04 Heribert Posch Déclencheur primaire pourvu d'espace à écoulement tourbillonnaire inversé

Also Published As

Publication number Publication date
DE4435749A1 (de) 1996-04-11
EP0706010A3 (fr) 1999-03-10
ATE236380T1 (de) 2003-04-15
DE4435749C2 (de) 1998-05-28
DE59510612D1 (de) 2003-05-08
EP0706010B1 (fr) 2003-04-02

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