EP0136338A1 - Auxiliary device for conventional boiler - Google Patents

Auxiliary device for conventional boiler

Info

Publication number
EP0136338A1
EP0136338A1 EP84901117A EP84901117A EP0136338A1 EP 0136338 A1 EP0136338 A1 EP 0136338A1 EP 84901117 A EP84901117 A EP 84901117A EP 84901117 A EP84901117 A EP 84901117A EP 0136338 A1 EP0136338 A1 EP 0136338A1
Authority
EP
European Patent Office
Prior art keywords
auxiliary device
grate
air
combustion air
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.)
Withdrawn
Application number
EP84901117A
Other languages
German (de)
French (fr)
Inventor
Lars Oskar Birger Axelsson
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.)
Malmbergs Verkstader AB
Original Assignee
Malmbergs Verkstader AB
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 Malmbergs Verkstader AB filed Critical Malmbergs Verkstader AB
Publication of EP0136338A1 publication Critical patent/EP0136338A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23LSUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
    • F23L1/00Passages or apertures for delivering primary air for combustion 
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23BMETHODS OR APPARATUS FOR COMBUSTION USING ONLY SOLID FUEL
    • F23B1/00Combustion apparatus using only lump fuel
    • F23B1/30Combustion apparatus using only lump fuel characterised by the form of combustion chamber
    • F23B1/36Combustion apparatus using only lump fuel characterised by the form of combustion chamber shaft-type
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23BMETHODS OR APPARATUS FOR COMBUSTION USING ONLY SOLID FUEL
    • F23B3/00Combustion apparatus which is portable or removable with respect to the boiler or other apparatus which is heated
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23MCASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FOR COMBUSTION CHAMBERS, e.g. FIREBRIDGES; DEVICES FOR DEFLECTING AIR, FLAMES OR COMBUSTION PRODUCTS IN COMBUSTION CHAMBERS; SAFETY ARRANGEMENTS SPECIALLY ADAPTED FOR COMBUSTION APPARATUS; DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDED FOR
    • F23M5/00Casings; Linings; Walls

Definitions

  • the present invention relates to an auxiliary device for a conven ⁇ tional boiler.
  • Most buildings are normally equipped with a boiler having a hearth.
  • the boiler may run on solid fuels, such as coke, wood and so, on as well as on oil. Electric immersion heating is also be ⁇ coming popular.
  • fuel of a different type is added, generally consisting of coke or wood.
  • a stoker device can be connected to the boiler in order to avoid having to fill the conventional boiler with solid fuel. Such an arrangement is unusually bulky and cannot be fitted to conventional boilers due to lack of space.
  • the object of the present invention is to enable the use of solid fuels without the need to refill them at short intervals. According to the invention this is achieved by the use of a cylindrical or pillarlike auxiliary device comprising a lower part and an upper part.
  • the lower part is in the form of a hearth for solid fuels and the upper part is a store for solid fuels.
  • the solid fuels are preferably supplied to the upper part from above.
  • the lower part has a connecting part or channel for connection of the lower part to an opening in the hearth of a conventional 'boiler.
  • the lower part or connecting channel includes an opening, preferably adjustable, for the supply of secondary air to the lower part.
  • the lower part is suitably lined to thermally insulate it. Insulation may be effected with refractory brick, mineral wool or some other insulating material.
  • the combustion gases formed in the auxiliary device can be influenced by one or more throttle means, these being arranged inside or outside the auxiliary device.
  • a fan supplying combustion air to the auxiliary device The quantity of air supplied can be regulated and regulation is per ⁇ formed by means of a thermostat or some other means sensing the tem ⁇ perature in the boiler itself.
  • the air supplied is spread in a manner ensuring satisfactory and uniform com ⁇ bustion without expended ash being blown about.
  • the air can be spread in two different ways; either by nozzles arranged at the exhaust end of the fan or by using fuel already in the auxiliary device to spread the air. Nozzles are used when the air is supplied to the auxiliary device grate from below. On the other hand, if air is supplied from above, the fuel already in the auxiliary device can be used to spread the air.
  • the grate in the auxiliary device is preferably arranged below the outlet opening of the connecting channel.
  • the size of the grate can be varied depending on the desired combustion.
  • the grate forms a transverse wall in the auxiliary device.
  • the plate is not generally horizontal but inclines gently up from its junction with the grate. This is to enable solid fuel to fall more easily down towards the grate.
  • the outlet end of the fan supplying combustion air may be located either above or below said grate and plate.
  • the fan nozzle is arranged so that the air flows along both side surfaces of the auxiliary device and rebounds against the surface of the side walls before passing the grate.
  • Fig.1 is a perspective view of a conventional boiler provided with an auxiliary device according to the present invention
  • Fig.2 shows a vertical cross-section through the conventional boiler and auxiliary device
  • Fig.3 shows a variation of an auxiliary device having a fan arranged with its outlet below the auxiliary device grate
  • Fig.3A shows a vertical section through the connecting part of the auxiliary device
  • Fig.3B shows the attachment flange of the connecting part
  • Fig.4 shows a cross section of the auxiliary device taken below the grate
  • Fig.5 shows a vertical section through an auxiliary device in which the combustion air is supplied to .the device above its grate.
  • 1 is a conventional boiler with a flue 14.
  • the boiler 1 has a hearth which may have been designed for a conventional oil- burner and been attached to the opening 3. However, if the boiler 1 had been used for solid fuels such as coke or wood, the opening 4 would have been used as supply opening for the solid fuel and the opening 3 might have been used for the removal of ash.
  • the hearth 2 contains a baffle plate 5 providing a throttling means for combustion gases from the hearth 2 in order to utilize .the heat content of the combustion gases to the full.
  • a cylin ⁇ drical unit consisting of a lower part 6 and an upper part 12.
  • the lower part 6 has a bottom.7, a peripheral wall 8 and a connecting channel 10. Both peripheral wall and connecting channel are made of heat-insulating material and preferably covered inside and outside with metal, preferably stainless steel.
  • the mouth of the connecting channel 10 is designed for connection to the opening 3 of a hearth 2 in a conventional boiler 1.
  • the heat-insulating material in the lower part 6 may be mineral wool or refractory brick.
  • the connecting channel 10 is provided with a valve 11 for the supply of secondary air to the lower part 6.
  • the lower part 6 is provided with an inspection hatch 9, also used for the removal of ash and the supply of primary air.
  • the lower part 6 also includes a grate 15.
  • the lower part 6 has an upper section constituting a direction continuation of the lower part.
  • This upper part is designated 12 and is made of any suitable material, preferably metal.
  • the upper part 12 is provided at the top with a lid 13 and is designed for the supply of solid fuel such as wood, peat, wood-chips, paper, pellets and other solid fuels having too short a combustion time to be used in conventional boilers.
  • solid fuel such as wood, peat, wood-chips, paper, pellets and other solid fuels having too short a combustion time to be used in conventional boilers.
  • G.-pj * boiler 1 is provided with an opening 4 for the supply of solid fuels and in this case the opening 3 is used for the removal of ash.
  • the conventional boiler includes a baffle plate 5 which has a throttling effect since the gas can only pass outside the edges of the baffel plate 5. Obviously such a baffle plate can be placed in the lower part 6.
  • the present invention functions as follows: In a conventional boiler 1 previously used for oil-firing, for instance, the oil-burner is dis ⁇ mantled from the opening 3.
  • the cylindrical auxiliary device 6 and 12 is then placed in front of the conventional boiler 1 so that the mouth of the connecting channel 10 fits the opening 3 of the conventional boiler 1.
  • the lid 13 is then removed and solid combustible material poured in. This is ignited through the inspection hatch 9 upon reach ⁇ ing the grate 15 and when it is burning properly the supply of secon ⁇ dary air is adjusted by means of the valve 11.
  • the upper part 12 is then filled with fuel right up to the lid 13.
  • the auxiliary device now contains enough fuel to give a reasonable interval before the operat ⁇ ing personnel must refill it. Combustion gases from the auxiliary device are throttled by the baffle plate 5 so that the heat content from the combustion gases is utilized to the full.
  • Figure 3 shows an auxiliary device 16 corresponding to the-device 6 and 12 in Figure 2.
  • the connecting part 17 is equivalent to the connecting part 10 in Figure 2.
  • a grate 19 is located below the opening to the auxiliary part and provided with an inclined section 20.
  • the parts 19 and 20 together form a transverse wall dividing the space into two separate parts, an upper and a lower part.
  • the upper part is provided with a supply section 21 for fuel and the lower part with a fan 22 with exhaust nozzle 25 blowing out air so that it flows along the side walls of the auxiliary device.
  • the quantity of air blown out from the fan may vary and is adjusted in accordance with the combustion desired.
  • the fan can also be controlled by members sensing the temperature of the water in the boiler itself and regulating the fan in accordance there ⁇ with.
  • the size of the grate 19 may vary depending on the desired combustion.
  • the connecting part 17 may also be adjusted to give the
  • the auxiliary device shown in Figure 3 functions as follows: The device is filled with fuel through opening 21. The solid fuel is then ignited and the desired quantity of combustion air supplied by means of fan 22. Figure 4 shows clearly how the combustion air leaves the fan 22 through the nozzle 25. The air will flow along the two side walls of the auxiliary device and rebound against the wall opposite the fan and below the grate 19. The reflected air passes through the grate and maintains the combustion process. Combustion gases then leave the grate 19 through the connecting part and enter the hearth of the boiler 1.
  • FIG. 5 shows the auxiliary device 16 with its grate 19 and inclined plate 20.
  • the fan in this device is however arranged in the roof and is designated 22a. Air from the fan 22a passes through the solid fuel above the transverse wall 18 and will be spread upon its passage through the solid fuel so that good combustion is obtained.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Solid-Fuel Combustion (AREA)

Abstract

Le besoin se fait sentir de répandre l'utilisation de chaudières conventionnelles pour divers types de combustibles. La présente invention constitue une nouvelle solution pour un dispositif auxiliaire en forme de pilier (6 et 12) conçu pour être raccordé devant une chaudière conventionnelle (1) et comportant une partie inférieure (6) en forme de foyer avec une grille (19) pour les combustibles solides et une partie supérieure (12) servant de magasin de combustibles solides à brûler, l'alimentation de la partie inférieure (6) en combustible s'effectuant par gravité. La grille (19) du dispositif auxiliaire (6 et 12) est de taille prédéterminée. La partie de raccord (17) possède un régulateur prédéterminé. Une quantité prédéterminée d'air de combustion est amenée avantageusement par un ventilateur (22).There is a need to spread the use of conventional boilers for various types of fuels. The present invention constitutes a new solution for an auxiliary pillar-shaped device (6 and 12) designed to be connected in front of a conventional boiler (1) and comprising a bottom part (6) in the form of a hearth with a grid (19) for the solid fuels and an upper part (12) serving as a store for solid fuels to be burned, the supply of the lower part (6) with fuel being effected by gravity. The grid (19) of the auxiliary device (6 and 12) is of predetermined size. The connection part (17) has a predetermined regulator. A predetermined quantity of combustion air is advantageously supplied by a fan (22).

Description

Auxiliary device for conventional boiler
The present invention relates to an auxiliary device for a conven¬ tional boiler. Most buildings are normally equipped with a boiler having a hearth. The boiler may run on solid fuels, such as coke, wood and so, on as well as on oil. Electric immersion heating is also be¬ coming popular. If a conventional boiler is to be utilized at regular intervals, fuel of a different type is added, generally consisting of coke or wood. A stoker device can be connected to the boiler in order to avoid having to fill the conventional boiler with solid fuel. Such an arrangement is unusually bulky and cannot be fitted to conventional boilers due to lack of space.
The object of the present invention is to enable the use of solid fuels without the need to refill them at short intervals. According to the invention this is achieved by the use of a cylindrical or pillarlike auxiliary device comprising a lower part and an upper part. The lower part is in the form of a hearth for solid fuels and the upper part is a store for solid fuels. The solid fuels are preferably supplied to the upper part from above. The lower part has a connecting part or channel for connection of the lower part to an opening in the hearth of a conventional 'boiler. The lower part or connecting channel includes an opening, preferably adjustable, for the supply of secondary air to the lower part.
The lower part is suitably lined to thermally insulate it. Insulation may be effected with refractory brick, mineral wool or some other insulating material. The combustion gases formed in the auxiliary device can be influenced by one or more throttle means, these being arranged inside or outside the auxiliary device.
According to an advantageous embodiment of the invention it is suit¬ able to arrange a fan supplying combustion air to the auxiliary device The quantity of air supplied can be regulated and regulation is per¬ formed by means of a thermostat or some other means sensing the tem¬ perature in the boiler itself. Inside the auxiliary device the air supplied is spread in a manner ensuring satisfactory and uniform com¬ bustion without expended ash being blown about. The air can be spread in two different ways; either by nozzles arranged at the exhaust end of the fan or by using fuel already in the auxiliary device to spread the air. Nozzles are used when the air is supplied to the auxiliary device grate from below. On the other hand, if air is supplied from above, the fuel already in the auxiliary device can be used to spread the air.
The grate in the auxiliary device is preferably arranged below the outlet opening of the connecting channel. The size of the grate can be varied depending on the desired combustion. Together with a plate, the grate forms a transverse wall in the auxiliary device. The plate is not generally horizontal but inclines gently up from its junction with the grate. This is to enable solid fuel to fall more easily down towards the grate.
The outlet end of the fan supplying combustion air may be located either above or below said grate and plate. In the latter case, the fan nozzle is arranged so that the air flows along both side surfaces of the auxiliary device and rebounds against the surface of the side walls before passing the grate.
Additional characteristics of the present invention are revealed in the following claims.
The present invention will be described more fully with reference to the accompanying drawings, in which
Fig.1 is a perspective view of a conventional boiler provided with an auxiliary device according to the present invention,
Fig.2 shows a vertical cross-section through the conventional boiler and auxiliary device,
Fig.3 shows a variation of an auxiliary device having a fan arranged with its outlet below the auxiliary device grate,
°J & /-. ? ' ■ Fig.3A shows a vertical section through the connecting part of the auxiliary device, Fig.3B shows the attachment flange of the connecting part Fig.4 shows a cross section of the auxiliary device taken below the grate, and Fig.5 shows a vertical section through an auxiliary device in which the combustion air is supplied to .the device above its grate.
In the drawings, 1 is a conventional boiler with a flue 14. The boiler 1 has a hearth which may have been designed for a conventional oil- burner and been attached to the opening 3. However, if the boiler 1 had been used for solid fuels such as coke or wood, the opening 4 would have been used as supply opening for the solid fuel and the opening 3 might have been used for the removal of ash. The hearth 2 contains a baffle plate 5 providing a throttling means for combustion gases from the hearth 2 in order to utilize .the heat content of the combustion gases to the full. In front of the conventional boiler 1 is a cylin¬ drical unit consisting of a lower part 6 and an upper part 12. The lower part 6 has a bottom.7, a peripheral wall 8 and a connecting channel 10. Both peripheral wall and connecting channel are made of heat-insulating material and preferably covered inside and outside with metal, preferably stainless steel. The mouth of the connecting channel 10 is designed for connection to the opening 3 of a hearth 2 in a conventional boiler 1. The heat-insulating material in the lower part 6 may be mineral wool or refractory brick. The connecting channel 10 is provided with a valve 11 for the supply of secondary air to the lower part 6. The lower part 6 is provided with an inspection hatch 9, also used for the removal of ash and the supply of primary air. The lower part 6 also includes a grate 15. The lower part 6 has an upper section constituting a direction continuation of the lower part. This upper part is designated 12 and is made of any suitable material, preferably metal. The upper part 12 is provided at the top with a lid 13 and is designed for the supply of solid fuel such as wood, peat, wood-chips, paper, pellets and other solid fuels having too short a combustion time to be used in conventional boilers. The conventional
G.-pj * boiler 1 is provided with an opening 4 for the supply of solid fuels and in this case the opening 3 is used for the removal of ash. To make use of the heat content in the combustion gas, the conventional boiler includes a baffle plate 5 which has a throttling effect since the gas can only pass outside the edges of the baffel plate 5. Obviously such a baffle plate can be placed in the lower part 6.
The present invention functions as follows: In a conventional boiler 1 previously used for oil-firing, for instance, the oil-burner is dis¬ mantled from the opening 3. The cylindrical auxiliary device 6 and 12 is then placed in front of the conventional boiler 1 so that the mouth of the connecting channel 10 fits the opening 3 of the conventional boiler 1. The lid 13 is then removed and solid combustible material poured in. This is ignited through the inspection hatch 9 upon reach¬ ing the grate 15 and when it is burning properly the supply of secon¬ dary air is adjusted by means of the valve 11. The upper part 12 is then filled with fuel right up to the lid 13. The auxiliary device now contains enough fuel to give a reasonable interval before the operat¬ ing personnel must refill it. Combustion gases from the auxiliary device are throttled by the baffle plate 5 so that the heat content from the combustion gases is utilized to the full.
Figure 3 shows an auxiliary device 16 corresponding to the-device 6 and 12 in Figure 2. The connecting part 17 is equivalent to the connecting part 10 in Figure 2. A grate 19 is located below the opening to the auxiliary part and provided with an inclined section 20. The parts 19 and 20 together form a transverse wall dividing the space into two separate parts, an upper and a lower part. The upper part is provided with a supply section 21 for fuel and the lower part with a fan 22 with exhaust nozzle 25 blowing out air so that it flows along the side walls of the auxiliary device. The quantity of air blown out from the fan may vary and is adjusted in accordance with the combustion desired. The fan can also be controlled by members sensing the temperature of the water in the boiler itself and regulating the fan in accordance there¬ with. The size of the grate 19 may vary depending on the desired combustion. The connecting part 17 may also be adjusted to give the
-H: desired throttling effect. The combustion can thus be controlled by three factors; variation of the combustion air, variation of the grate size and variation of the throttling capacity of the connecting part. The auxiliary device shown in Figure 3 functions as follows: The device is filled with fuel through opening 21. The solid fuel is then ignited and the desired quantity of combustion air supplied by means of fan 22. Figure 4 shows clearly how the combustion air leaves the fan 22 through the nozzle 25. The air will flow along the two side walls of the auxiliary device and rebound against the wall opposite the fan and below the grate 19. The reflected air passes through the grate and maintains the combustion process. Combustion gases then leave the grate 19 through the connecting part and enter the hearth of the boiler 1.
Figure 5 shows the auxiliary device 16 with its grate 19 and inclined plate 20. The fan in this device is however arranged in the roof and is designated 22a. Air from the fan 22a passes through the solid fuel above the transverse wall 18 and will be spread upon its passage through the solid fuel so that good combustion is obtained.
"BU £4( C Pl

Claims

1. Auxiliary device for a conventional boiler running on electri¬ city, oil or solid fuels, said auxiliary device comprising a tower or pillarlike unit with a lower part (6) and an upper part (12), the lower part being provided with a grate for the combus¬ tion of solid fuels and a connecting part (10) for connection to the hearth opening (3) of a conventional boiler (1), and the upper part (12) being designed to constitute a fuel store (12) for solid fuels to be fed by means of gravity to the lower part (6) to be combusted there, characterised in that the grate (19) covers the entire cross-section of the pillarlike unit (16) and is completely or partially permeable at least to gas and pos¬ sibly also to ash particles, the permeable section (19) being located close to the connecting part (17), that the connecting part resembles a valve or nozzle with predetermined throttling or adjustable throttling and that a means, preferably regulat- able, for the supply of combustion air is applied to the unit (16) in such a way that the air is supplied to the grate (19) in as wide a spread as possible, the air being preferably reflected against the inner walls of the unit.
I
2. Auxiliary device according to claim 1, characterised in that at inverse combustion, the combustion air is supplied to the grate (19) from above so that the fuel present causes spreading of the combustion air.
3. -Auxiliary device according to claim 1, characterised in that when combustion air is supplied to the grate (19) from below, it is caused by members such as a nozzle (25) to follow the inner walls of the arrangement and preferably to reflect against wall or walls before it reaches the grate (19).
4. Auxiliary device according to any of the preceding claims, characterised by the provision of members to control the combus¬ tion air depending on the water temperature of the boiler.
5. Auxiliary device according to claim 1, characterised in that the lower part (6), and preferably also the upper part (12), is lined with heat-insulating material such as refractory brick.
6. Auxiliary device according to claim 1, characterised in that the upper part (12) is designed to allow fuel to be fed in at the top.
7. Auxiliary device according to claim 1, characterised in that the lower part (6) is provided with a part (11) for secondary air, said part (11) being preferably adjustable.
8. Auxiliary device according to one or more of the preceding claims, characterised in that a throttling means (5) is arranged for combustion air from the auxiliary device (6 and 12).
EP84901117A 1983-03-03 1984-03-02 Auxiliary device for conventional boiler Withdrawn EP0136338A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8301170A SE8301170L (en) 1983-03-03 1983-03-03 DEVICE FOR CONVENTIONAL HEATER APPLIANCES
SE8301170 1983-03-03

Publications (1)

Publication Number Publication Date
EP0136338A1 true EP0136338A1 (en) 1985-04-10

Family

ID=20350243

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84901117A Withdrawn EP0136338A1 (en) 1983-03-03 1984-03-02 Auxiliary device for conventional boiler

Country Status (3)

Country Link
EP (1) EP0136338A1 (en)
SE (1) SE8301170L (en)
WO (1) WO1984003549A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI843656A0 (en) * 1984-09-18 1984-09-18 Maamiehen Saehkoe Oy BRAENNARE.

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US974322A (en) * 1910-07-09 1910-11-01 George E Wells Smoke-consuming furnace.
CH135433A (en) * 1928-10-29 1929-09-30 Carl Luber & Sohn Combustion system.
CH197530A (en) * 1937-08-07 1938-05-15 Armand Pahud & Cie Wood heating process and apparatus for its implementation.
CH198083A (en) * 1937-09-29 1938-06-15 Rochat Charles L Heating appliance.
CH226665A (en) * 1942-05-11 1943-04-30 Torrente Lucien Wood fuel burner, in particular sawdust.
CH235260A (en) * 1943-07-30 1944-11-30 Joh Mueller Aktiengesellschaft Method and device for igniting and burning the gas produced in wood gas generators.
CH235011A (en) * 1943-08-14 1944-11-15 Ag Fumax Gas generator with burner for wood and peat.
CH233805A (en) * 1943-12-24 1944-08-31 Longoni Giovanni Device to be applied to a boiler to burn wood sawdust.
EP0050105A3 (en) * 1980-10-09 1982-09-29 Kurt Sjöstrand A method and a device for the combustion of solid fuels

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8403549A1 *

Also Published As

Publication number Publication date
SE8301170L (en) 1984-09-04
WO1984003549A1 (en) 1984-09-13
SE8301170D0 (en) 1983-03-03

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Inventor name: AXELSSON, LARS, OSKAR, BIRGER