EP3620716B1 - Chaudière pour la combustion de combustible - Google Patents

Chaudière pour la combustion de combustible Download PDF

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Publication number
EP3620716B1
EP3620716B1 EP18193313.6A EP18193313A EP3620716B1 EP 3620716 B1 EP3620716 B1 EP 3620716B1 EP 18193313 A EP18193313 A EP 18193313A EP 3620716 B1 EP3620716 B1 EP 3620716B1
Authority
EP
European Patent Office
Prior art keywords
shut
boiler according
air
boiler
fuel
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.)
Active
Application number
EP18193313.6A
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German (de)
English (en)
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EP3620716A1 (fr
Inventor
Ernst Hutterer
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.)
Froeling Heizkessel und Behaelterbau GmbH
Original Assignee
Froeling Heizkessel und Behaelterbau GmbH
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Application filed by Froeling Heizkessel und Behaelterbau GmbH filed Critical Froeling Heizkessel und Behaelterbau GmbH
Priority to EP18193313.6A priority Critical patent/EP3620716B1/fr
Priority to SI201830625T priority patent/SI3620716T1/sl
Publication of EP3620716A1 publication Critical patent/EP3620716A1/fr
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Publication of EP3620716B1 publication Critical patent/EP3620716B1/fr
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23B—METHODS OR APPARATUS FOR COMBUSTION USING ONLY SOLID FUEL
    • F23B40/00—Combustion apparatus with driven means for feeding fuel into the combustion chamber
    • F23B40/06—Combustion apparatus with driven means for feeding fuel into the combustion chamber the fuel being fed along the fuel-supporting surface
    • F23B40/08—Combustion apparatus with driven means for feeding fuel into the combustion chamber the fuel being fed along the fuel-supporting surface into pot- or trough-shaped grates
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23B—METHODS OR APPARATUS FOR COMBUSTION USING ONLY SOLID FUEL
    • F23B60/00—Combustion apparatus in which the fuel burns essentially without moving
    • F23B60/02—Combustion apparatus in which the fuel burns essentially without moving with combustion air supplied through a grate
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23B—METHODS OR APPARATUS FOR COMBUSTION USING ONLY SOLID FUEL
    • F23B2900/00—Special features of, or arrangements for combustion apparatus using solid fuels; Combustion processes therefor
    • F23B2900/00001—Combustion chambers with integrated fuel hopper

Definitions

  • the invention relates to a heating boiler for burning fuel, in particular pellets, with a combustion chamber, with a fuel feed for charging the combustion chamber with fuel, the fuel feed having an intermediate container for the fuel, a burn-back protection with a shut-off device, in particular a slide, and a drive for actuation of the shut-off element, and with an air supply which opens into the combustion chamber and which has at least one device with a drivable actuator, in particular an air slide, for adjusting the amount of air.
  • the backbone protection of the boiler protects against undesired fire development in the intermediate container on the boiler and / or in the storage room, which is connected to the intermediate container of the boiler for charging it with fuel.
  • a wide variety of structural designs of the shut-off devices of backbone safety devices are known, for example having a slide and a drive for actuating the slide in order to close or open an opening for fuel.
  • actuatable control elements for example air slides ( DE3903739A1 ) in order to be able to adjust the amount of primary air and / or secondary air and / or heating air or, in general, combustion air in the combustion chamber.
  • a prior art according to the preamble of claim 1 is from DE202014104897U1 known.
  • the invention has therefore set itself the task of improving the operational reliability of the boiler, based on the boiler described at the beginning. In addition, the design effort on the boiler should be reduced.
  • the invention solves the problem posed by the features of claim 1.
  • the drive of the burn-back safety device also actuates the actuator of the device for adjusting the air volume
  • the common drive not only reduces the construction effort and the control and regulation effort on the boiler, it also increases the functional reliability of the boiler.
  • a technical malfunction affects both areas of the boiler, which makes it easier to identify irregularities in the boiler. For example, when a faulty combustion and output control on the boiler is detected, it is possible to conclude that there may also be a fault in the burn-back protection. So it is possible to reduce the number of checkpoints when troubleshooting.
  • the inventive coupling of two essentially functionally independent systems on the boiler according to the invention can simplify maintenance and increase the overall operational reliability of the boiler - for example, by putting the boiler into a safe operating state, such as shutdown, when a fault is detected.
  • Irregularities in the boiler can be recognized quickly, in particular, if the control element of the device for setting the air volume is provided in the secondary air supply of the air supply.
  • An incorrect setting / regulation of the secondary air supply has a rapid effect, for example, on an exhaust gas measurement of the boiler, which can enable a comparatively quick check of the boiler for functional reliability.
  • the fuel supply preferably charges the intermediate container with fuel via the burn-back protection. When the intermediate container is being charged, the boiler is usually in the "switched off" operating state, which means that a malfunction affects the "start-up” operating state or it can be canceled before the "full load” or “partial load” operating state of the boiler is reached. The operational safety of the boiler can thereby be further increased.
  • the construction can also be simplified if the intermediate container has an entry opening for the fuel and if the shut-off element cooperates with the entry opening to open or close it.
  • this position of the burn-back protection can facilitate accessibility - which in turn can further reduce maintenance and repair costs on the boiler.
  • the shut-off element can have a further function in protecting against burn-back. Among other things, this further simplifies the construction.
  • the shut-off element preferably has an 8-shaped outer contour in plan view in order to be able to fulfill both functions in a stable manner.
  • shut-off device is provided in the intermediate container.
  • the shut-off element has at least one protruding clearing element on the side facing away from the entry opening, the functional reliability of the burn-back protection can be further increased. For example, an impairment of the function of the burn-back protection can be avoided with the help of the clearing element.
  • the intermediate container carries the device for adjusting the air volume, the accessibility to the common drive and the elements moving with it can be further facilitated. It is also possible to increase the compactness of the boiler through the proximity of the burn-back protection and the device for adjusting the air volume.
  • the device for adjusting the air volume has an air box with an inflow opening and an outflow opening, the control element cooperating with the inflow and / or outflow opening for adjusting the air volume.
  • the construction of the boiler can be further simplified.
  • the construction conditions can be further simplified if the drive is designed to operate the shut-off element and the actuator in a rotatable manner. In addition, this can further increase the safety in the joint actuation of the shut-off element and actuator.
  • the construction can be further simplified if the drive has a drive shaft to which the shut-off element and actuator are attached.
  • a particularly safe joint actuation of the burn-back protection and the actuator can be ensured if the dimensions of the shut-off device, in particular its width, are designed in such a way that the burn-back protection is kept closed when the actuator is operated to adjust the air volume.
  • FIG. 1 an exemplary embodiment of a heating boiler 1 according to the invention is partially shown in a side view, which has a combustion chamber 2, a fuel supply 3 and an air supply 8.
  • the fuel supply 3 comprises - seen in the loading direction - a first burn-back protection 4.1, a subsequent intermediate container 5, a second burn-back protection 4.2 and an insertion screw 6 opening into the combustion chamber 2 to bring in the combustion chamber 2 - which is not shown.
  • the fuel supply 3 feeds the intermediate container 5 with fuel 7 via the first burn-back protection 4.1. Subsequently, fuel 7 is introduced into the combustion chamber 2 with the aid of the fuel supply 3, which fuel 7 is pyrolyzed, gasified and / or preferably burned in the boiler.
  • combustion air 9 is supplied to combustion chamber 2 via an air supply 8 with control / regulation of the air volume, that is to say with air volume adjustment.
  • the air supply 8 has a device 10 with a driven actuator 11, namely an air slide 11.1.
  • the first burn-back safety device 4.1 has a shut-off device 12, namely a slide 12.1
  • the second burn-back safety device 4.2 is designed, for example, as a rotary valve 13 - but this second burn-back safety device 4.2 can also have a slide, a flap, etc., which is not shown is.
  • the shut-off element 12, namely slide 12.1, of the first burn-back protection 4.1 is actuated - namely rotated - by a preferably electrical, in particular rotary, drive 14, preferably stepped drive, in order to open an entry opening 15 for the fuel 7 that opens into the intermediate container 5 or close.
  • the first burn-back protection 4.1 therefore interacts with the entry opening 15.
  • the intermediate container 5 can thus be filled with fuel 7 from a storage room (not shown in detail) via a line 22, preferably a connecting hose - with the aid of an indicated suction fan 23 on the boiler 1.
  • the drive 14, which moves the shut-off element 12 of the first burn-back protection 4.1 also drives the control element 11 of the air supply 8 to adjust the air volume.
  • the actuator 11 is therefore also actuated, namely rotated, by the drive 14.
  • the shut-off element 12 and the actuator 11 are attached to a drive shaft 14.1 of the drive 14. By rotating the drive shaft 14.1, the shut-off element 12 and the actuator 11 change their rotational position together.
  • the first burn-back protection 4.1 and the air supply 8 can be actuated with a single drive 14 or a control / regulation of the drive 14. This reduces the construction effort on the boiler 1. It also increases the functional reliability of the boiler 1. Irregularities have an effect on both components of the boiler 1 - namely on the first burn-back protection 4.1 and on the air supply 8 -, which makes them particularly can be recorded safely. If such a fault is detected, the boiler 1 can immediately be brought into a safe operating state or its start-up can be prevented. The boiler 1 according to the invention therefore has a high level of operational reliability. Furthermore, this results in a lower number of error points to be checked.
  • the air supply 8 with a primary air supply 8.1 and a secondary air supply 8.2 opens into the combustion chamber 2.
  • the primary air supply 8.1 opens through a grate 15 into the combustion chamber 2
  • the secondary air supply 8.2 opens into the combustion chamber 2 above the fuel 7 provided in the combustion chamber 2.
  • the device 10 for adjusting the amount of air is provided in the secondary air supply 8.2, as in FIG Fig. 1 to recognize.
  • the device 10 has an air box 16 with an inflow opening 17 and an outflow opening 18 for adjusting the amount of air.
  • the control element 11 interacts with the inflow opening 17 to adjust the amount of air, in that the control element 11 closes or opens the inflow opening 17, entirely or in certain areas, as required.
  • the actuator 11 interacts with the outflow opening 18 or with the outflow opening 18 and inflow opening 17 to adjust the amount of air.
  • the air box 16 is provided on the container cover 19 of the intermediate container 5 and is partially formed by this; in the exemplary embodiment this is its bottom wall.
  • the intermediate container 5 has a sensor 20 on its container cover 19 for determining the filling level in the intermediate container 5. This ensures the desired degree of filling of the intermediate container 5.
  • the shut-off element 12 of the burn-back protection 4.1 also has at least one protruding clearing element 21 on the side 12.1 facing away from the entry opening 5 in order to distribute the fuel 7 in the intermediate container 5.
  • the shut-off element 12 of the burn-back protection 4.1 has a width 12.2 which is increased compared to shut-off elements known from the prior art. This in order to close the burn-back protection 4.1 for fuel 7 over the entire adjustment path 24 or the entire arc length or the entire adjustment angle of the actuator 11 when setting the air volume keep. Inadvertent opening of the burn-back protection 4.1, for example when the boiler 1 is under load, cannot therefore occur.
  • Fig. 3 In addition, two different rotational positions of the actuator 11 and shut-off element 12 are shown. In the dashed rotational position 25, the burn-back protection 4.1 for fuel 7 is open. In the other rotational position 26, the burn-back protection 4.1 for fuel 7 is closed and the actuator 11 is set in a certain travel or angle 24 for setting the air volume.
  • the burn-back protection 4.1 opens and closes with the shut-off element 12 also a suction opening 27 in the intermediate container 5 for a return air line of the suction fan 23.
  • This suction opening 27 is shown in FIG Fig. 1 shown torn open in the air box 16, but is located outside the air box 16, as in FIG Fig. 3 to see.
  • the burn-back protection 4.1 is open for the suction of air from the intermediate container 5.
  • the burn-back protection 4.1 for the suction of air from the intermediate container 5 is closed.
  • the shut-off element 12 has an 8-shaped outer contour 12.3 in plan view, as shown in FIG Fig. 3 can be seen.
  • the air box 16 has a connection 28 for the, preferably external, combustion air 9 at the inflow opening 17.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Regulation And Control Of Combustion (AREA)

Claims (14)

  1. Chaudière pour brûler du combustible (7), en particulier des pellets, avec une chambre de combustion (2), avec une arrivée de combustible (3) destinée à charger la chambre de combustion (2) avec du combustible (7), dans lequel l'arrivée de combustible (3) comprend un réservoir intermédiaire (5) pour le combustible (7), une sécurité contre les retours de flamme (4.1, 4.2) avec un organe d'obturation (12), en particulier un tiroir (12.1), et un entraînement (14) pour actionner l'organe d'obturation (12), et avec une arrivée d'air (8) débouchant dans la chambre de combustion (2), qui comprend au moins un dispositif (10) avec un organe de réglage (11) pouvant être entraîné, en particulier un registre d'air (11.1), pour réguler le débit d'air, caractérisée en ce que l'entraînement (14) de la sécurité contre les retours de flamme (4.1) actionne aussi l'organe de réglage (11) du dispositif (10) de régulation du débit d'air.
  2. Chaudière selon la revendication 1, caractérisée en ce que l'organe de réglage (11) du dispositif (10) pour la régulation du débit d'air est prévu dans l'arrivée d'air secondaire (8.2) de l'arrivée d'air (8).
  3. Chaudière selon la revendication 1 ou 2, caractérisée en ce que l'arrivée de combustible (3) remplit le réservoir intermédiaire (5) de combustible (7) par-dessus la sécurité contre les retours de flamme (4.1).
  4. Chaudière selon la revendication 1, 2 ou 3, caractérisée en ce que le réservoir intermédiaire (5) présente une ouverture d'introduction (15) pour le combustible (7) et en ce que l'organe d'obturation (12) coopère avec l'ouverture d'introduction (15) pour ouvrir ou fermer celle-ci.
  5. Chaudière selon la revendication 4, caractérisée en ce que le réservoir intermédiaire (5) présente une ouverture d'aspiration (27) pour une conduite d'air de retour et en ce que l'organe d'obturation (12) coopère avec l'ouverture d'aspiration (27) pour ouvrir ou fermer celle-ci.
  6. Chaudière selon la revendication 5, caractérisée en ce que l'organe d'obturation (12) présente en vue de dessus un contour extérieur (12.3) en forme de 8.
  7. Chaudière selon la revendication 4, 5 ou 6, caractérisée en ce que l'organe d'obturation (12) est prévu dans le réservoir intermédiaire (5).
  8. Chaudière selon la revendication 7, caractérisée en ce que l'organe d'obturation (12) présente, sur le côté (12.1) tourné à l'opposé de l'ouverture d'introduction (15), au moins un élément de dégagement (21) en saillie.
  9. Chaudière selon l'une des revendications 1 à 8, caractérisée en ce que le réservoir intermédiaire (5) porte le dispositif (10) pour la régulation du débit d'air.
  10. Chaudière selon l'une des revendications 1 à 9, caractérisée en ce que le dispositif (10) pour la régulation du débit d'air comprend un caisson de ventilation (16) avec une ouverture d'entrée (17) et une ouverture de sortie (18), l'organe de réglage (11) coopérant avec l'ouverture d'entrée et/ou l'ouverture de sortie (17, 18) pour réguler le débit d'air.
  11. Chaudière selon la revendication 10, caractérisée en ce qu'un couvercle de réservoir (19) du réservoir intermédiaire (5) forme en partie le caisson de ventilation (16).
  12. Chaudière selon l'une des revendications 1 à 11, caractérisée en ce que l'entraînement (14) est conformé pour actionner de façon rotative l'organe d'obturation (12) et l'organe de réglage (11).
  13. Chaudière selon l'une des revendications 1 à 12, caractérisée en ce que l'entraînement (14) présente un arbre d'entraînement (14.1) sur lequel l'organe d'obturation (12) et l'organe de réglage (11) sont fixés.
  14. Chaudière selon l'une des revendications 1 à 13, caractérisée en ce que les dimensions de l'organe d'obturation (12), en particulier sa largeur (12.2), sont conçues de façon à maintenir la sécurité contre les retours de flamme (4.1) fermée quand l'organe de réglage (11) pour la régulation du débit d'air est actionné.
EP18193313.6A 2018-09-07 2018-09-07 Chaudière pour la combustion de combustible Active EP3620716B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP18193313.6A EP3620716B1 (fr) 2018-09-07 2018-09-07 Chaudière pour la combustion de combustible
SI201830625T SI3620716T1 (sl) 2018-09-07 2018-09-07 Kotel za ogrevanje za kurjenje kuriva

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP18193313.6A EP3620716B1 (fr) 2018-09-07 2018-09-07 Chaudière pour la combustion de combustible

Publications (2)

Publication Number Publication Date
EP3620716A1 EP3620716A1 (fr) 2020-03-11
EP3620716B1 true EP3620716B1 (fr) 2022-01-05

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ID=63528663

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18193313.6A Active EP3620716B1 (fr) 2018-09-07 2018-09-07 Chaudière pour la combustion de combustible

Country Status (2)

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EP (1) EP3620716B1 (fr)
SI (1) SI3620716T1 (fr)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT399572B (de) * 1988-02-09 1995-06-26 Karl Stefan Riener Zuluftregelvorrichtung für eine heizeinrichtung
US7739966B2 (en) * 2005-12-01 2010-06-22 Janfire Ab Device and method for the combustion of granular, solid fuel
AT506970B1 (de) * 2008-10-27 2010-01-15 Haas & Sohn Ofentechnik Gmbh Reinigungssystem für einen ofen
DE202014104897U1 (de) * 2014-10-14 2014-10-28 Lasco Heutechnik Gmbh Mobile Festbrennstofffeuerungsanlage

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Publication number Publication date
EP3620716A1 (fr) 2020-03-11
SI3620716T1 (sl) 2022-05-31

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