EP3620716A1 - Chaudière pour la combustion de combustible - Google Patents

Chaudière pour la combustion de combustible Download PDF

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Publication number
EP3620716A1
EP3620716A1 EP18193313.6A EP18193313A EP3620716A1 EP 3620716 A1 EP3620716 A1 EP 3620716A1 EP 18193313 A EP18193313 A EP 18193313A EP 3620716 A1 EP3620716 A1 EP 3620716A1
Authority
EP
European Patent Office
Prior art keywords
shut
fuel
air
boiler according
boiler
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
EP18193313.6A
Other languages
German (de)
English (en)
Other versions
EP3620716B1 (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
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 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
Application granted granted Critical
Publication of EP3620716B1 publication Critical patent/EP3620716B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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 boiler for the combustion of fuel, in particular pellets, with a combustion chamber, with a fuel supply for charging the combustion chamber with fuel, the fuel supply an intermediate container for the fuel, a fire protection device with a shut-off device, in particular slide valve, and a drive for actuation of the shut-off device, and with an air supply opening into the combustion chamber, which has at least one device with a drivable actuator, in particular air slide, for adjusting the air volume.
  • the invention therefore has the task of improving the operational safety of the boiler.
  • the design effort on the boiler should be reduced.
  • the joint drive not only reduces the construction and control effort on the boiler, but also increases the functional reliability of the boiler.
  • the coupling of the fire protection device and the device for adjusting the air volume causes a technical malfunction in both areas of the boiler, which makes irregularities in the boiler easier to identify. For example, if the combustion and power control on the boiler is detected as faulty, it is possible to conclude that there may also be a fault in the burn-back protection. It is therefore possible to reduce the number of checkpoints when troubleshooting.
  • the coupling on the drive side according to the invention of two essentially functionally independent systems on the boiler can therefore simplify maintenance or increase the overall operational reliability of the boiler - for example by putting the boiler in a safe operating state, such as shutting down, when a fault is detected.
  • Irregularities in the boiler can be quickly recognized, in particular, if the actuator of the device for adjusting the air volume is provided in the secondary air supply of the air supply.
  • a faulty setting / control of the secondary air supply for example, quickly affects an exhaust gas measurement of the boiler, which can enable a comparatively quick check of the boiler for functional reliability.
  • the fuel supply preferably feeds the intermediate container with fuel via the burn-back protection.
  • the boiler is usually in the "switched off" operating state, which means that a malfunction affects the "starting" operating state or can be terminated before the "full load” or "partial load” operating state of the boiler is reached.
  • the operational safety of the boiler can be increased further.
  • the construction can also be simplified if the intermediate container has an entry opening for the fuel and if the shut-off element interacts with the entry opening to open or close it.
  • this position of the burn-back protection can facilitate access - which in turn can further reduce the maintenance and repair work on the boiler.
  • the shut-off device can also have another function in the backburn protection. Among other things, this further simplifies the design.
  • the shut-off device preferably has an 8-shaped outer contour in plan view in order to be able to perform both functions in a stable manner.
  • shut-off device is provided in the intermediate container.
  • the shut-off device 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 increased further. For example, an impairment of the function of the fire 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 moved with it can be further facilitated. It is also possible to increase the compactness of the boiler by the proximity of the fire protection and the device for adjusting the air volume.
  • the device for adjusting the air quantity has an air box with an inflow opening and an outflow opening, the actuator interacting with the inflow and / or outflow opening for adjusting the air quantity.
  • the design of the boiler can also be simplified.
  • the design relationships can be further simplified if the drive is designed to actuate 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 the actuator.
  • the construction can be further simplified if the drive has a drive shaft to which the shut-off element and the actuator are fastened.
  • a particularly safe joint actuation of the fire protection device and the actuator can be ensured if the dimensions of the shut-off device, in particular its width, are designed to keep the fire protection device closed when the actuating device is used to adjust the air volume.
  • a side view of an embodiment of a boiler 1 according to the invention is partially shown, which has a combustion chamber 2, a fuel supply 3 and an air supply 8.
  • the fuel feed 3 comprises - seen in the direction of loading - 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.
  • a downpipe or other introduction means are also conceivable for storing fuel 7 in to bring 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, the fuel supply 3 is used to introduce fuel 7 into the combustion chamber 2, which fuel 7 is pyrolyzed, gasified and / or preferably burned in the boiler.
  • combustion air 9 is supplied to the combustion chamber 2 via an air supply 8 under control / regulation of the air quantity, that is to say with the air quantity setting.
  • the air supply 8 has a device 10 with a driven actuator 11, namely an air slide 11.1.
  • the first burn-back protection 4.1 has a shut-off device 12, namely a slide 12.1
  • the second burn-back protection 4.2 is designed, for example, as a cellular wheel sluice 13 - this second burn-back protection 4.2 can also have a slide, a flap, etc., which is not shown is.
  • the shut-off device 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 a stepping drive, in order to open an entry opening 15 for the fuel 7 opening into the intermediate container 5 or close.
  • the first burn protection 4.1 therefore interacts with the entry opening 15.
  • the intermediate container 5 can thus be filled with fuel 7 from a storage space (not shown) 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 actuator 11 of the air supply 8 for adjusting the air quantity.
  • the actuator 11 is therefore also operated by the drive 14, namely rotated.
  • shut-off device 12 and actuator 11 are attached to a drive shaft 14.1 of drive 14. By turning the drive shaft 14.1 shut-off element 12 and actuator 11 change their rotational position together.
  • the first burn-back protection 4.1 and the air supply 8 can thus be actuated with a single drive 14 or a control of the drive 14. This reduces the design effort for the boiler 1. In addition, this also increases the functional reliability of the boiler 1. Irregularities affect both components of the boiler 1 - namely on the first fire protection device 4.1 and on the air supply 8 - which makes them particularly can be captured safely. If such a fault is detected, the boiler 1 can be brought into a safe operating state immediately or its start-up prevented. The boiler 1 according to the invention therefore has a high level of operational reliability. Furthermore, a smaller number of error points to be checked is thereby achieved.
  • the air supply 8 opens into the combustion chamber 2 with a primary air supply 8.1 and a secondary air supply 8.2.
  • the primary air supply 8.1 opens into the combustion chamber 2 through a grate 15
  • 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 air volume adjustment is provided in the secondary air supply 8.2, as in 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 air quantity.
  • the control element 11 interacts with the inflow opening 17 for adjusting the air volume, in that the control element 11 closes or opens the inflow opening 17 entirely or in regions, as required.
  • the actuator 11 interacts with the outflow opening 18 or with outflow opening 18 and inflow opening 17 for adjusting the air quantity.
  • the air box 16 is provided on the container lid 19 of the intermediate container 5 and is partially formed by the latter, in the exemplary embodiment this is the bottom wall thereof.
  • the intermediate container 5 on its container lid 19 has a sensor 20 for determining the fill 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 the shut-off elements known from the prior art. This in order to close the burnout protection device 4.1 for fuel 7 over the entire actuating path 24 or the entire arc length or the entire actuating angle of the actuator 11 when adjusting the air volume hold. An inadvertent opening of the burn-back protection 4.1, for example in the load state of the boiler 1, cannot therefore occur.
  • FIG. 3 two different rotational positions of actuator 11 and shut-off element 12 are also shown.
  • the burn-back protection 4.1 for fuel 7 is open.
  • the burn-back protection 4.1 for fuel 7 is closed and the control element 11 is set in a certain control path or angle 24 for the air quantity setting.
  • the burn-back protection 4.1 with the shut-off element 12 also opens and closes a suction opening 27 in the intermediate container 5 for a return air line of the suction blower 23.
  • This drinking 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. 3 to see.
  • the backburn protection 4.1 is open for the extraction of air from the intermediate container 5.
  • the fire protection 4.1 is closed for the extraction of air from the intermediate container 5.
  • 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.

Landscapes

  • 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)
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 true EP3620716A1 (fr) 2020-03-11
EP3620716B1 EP3620716B1 (fr) 2022-01-05

Family

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)

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

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3903739A1 (de) * 1988-02-09 1989-08-17 Rika Metallwaren Zugregelvorrichtung fuer eine heizeinrichtung
US20070125281A1 (en) * 2005-12-01 2007-06-07 Robert Ingvarsson Device and method for the combustion of granular, solid fuel
AT506970A4 (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

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3903739A1 (de) * 1988-02-09 1989-08-17 Rika Metallwaren Zugregelvorrichtung fuer eine heizeinrichtung
US20070125281A1 (en) * 2005-12-01 2007-06-07 Robert Ingvarsson Device and method for the combustion of granular, solid fuel
AT506970A4 (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

Also Published As

Publication number Publication date
EP3620716B1 (fr) 2022-01-05
SI3620716T1 (sl) 2022-05-31

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