NL2001058C2 - Fireplace and method for cleaning combustion gases from a fire. - Google Patents

Fireplace and method for cleaning combustion gases from a fire. Download PDF

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Publication number
NL2001058C2
NL2001058C2 NL2001058A NL2001058A NL2001058C2 NL 2001058 C2 NL2001058 C2 NL 2001058C2 NL 2001058 A NL2001058 A NL 2001058A NL 2001058 A NL2001058 A NL 2001058A NL 2001058 C2 NL2001058 C2 NL 2001058C2
Authority
NL
Netherlands
Prior art keywords
foam
fireplace
fire
hearth
gases
Prior art date
Application number
NL2001058A
Other languages
Dutch (nl)
Inventor
Wouter Frans Sulilatu
Original Assignee
D & J Holding B V
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 D & J Holding B V filed Critical D & J Holding B V
Priority to NL2001058A priority Critical patent/NL2001058C2/en
Priority to NL2001058 priority
Application granted granted Critical
Publication of NL2001058C2 publication Critical patent/NL2001058C2/en

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23JREMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J15/00Arrangements of devices for treating smoke or fumes
    • F23J15/02Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
    • F23J15/022Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material for removing solid particulate material from the gasflow
    • F23J15/025Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material for removing solid particulate material from the gasflow using filters
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23BMETHODS OR APPARATUS FOR COMBUSTION USING ONLY SOLID FUEL
    • F23B5/00Combustion apparatus with arrangements for burning uncombusted material from primary combustion
    • F23B5/02Combustion apparatus with arrangements for burning uncombusted material from primary combustion in main combustion chamber
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23BMETHODS OR APPARATUS FOR COMBUSTION USING ONLY SOLID FUEL
    • F23B90/00Combustion methods not related to a particular type of apparatus
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24BDOMESTIC STOVES OR RANGES FOR SOLID FUELS
    • F24B13/00Details solely applicable to stoves or ranges burning solid fuels
    • F24B13/006Arrangements for cleaning, e.g. soot removal; Ash removal
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23JREMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J2217/00Intercepting solids
    • F23J2217/10Intercepting solids by filters
    • F23J2217/104High temperature resistant (ceramic) type

Description

Fireplace and method for cleaning combustion gases from a fire

The present invention relates to a fireplace comprising a fire place, a housing at least partially surrounding the fire place, and a flue gas outlet connecting to the housing 5. The invention also relates to a method for cleaning combustion gases from a fireplace.

The use of fireplaces for heating purposes was already known in ancient times.

In the current application of fireplaces for heating purposes gas-fired fireplaces and solid fuel appliances (such as for example wood-burning fireplaces) in very different types can be envisaged. Fireplaces are not limited to: open fireplaces, gas-permeable shielded fireplaces, glass-enclosed fireplaces, stove fireplaces and so on. A drawback of the existing fireplaces is that they can be environmentally harmful in densely populated areas because of the contamination of the combustion gases with dust particles. Moreover, the energy efficiency of fireplaces is generally low (fireplaces usually have an efficiency in the order of magnitude of -5 - 15% and built-in / insert fireplaces and freestanding stoves have an efficiency in the order of magnitude of 70 - 85%). There is therefore a trend to prevent the use of fireplaces by the government. For example, 20 examples are already known in which the emission values of a fireplace may not exceed certain standards.

The object of the present invention is to provide a hearth, as well as to provide a method for cleaning combustion gases from a hearth, with which the emission of dust from a hearth is reduced in a very efficient manner.

To this end, the invention provides a fireplace of the type mentioned in the preamble, characterized in that the outlet connects to the fire place through the intermediary of a bushing made of foam material, which bushing made of foam material is directed to the fire place. The foam material can in this way function as a filter material with which dust particles, such as fine dust, among other things, can be captured from the flue gases. The foam material can function both as a filter material for the combustion of fossil fuels and for non-fossil 2 fuels. The dust particles thus captured are trapped in the foam material and can, if the foam material is sufficiently heated by heat derived from the fire place, burn again so that much cleaner combustion gases remain than in fireplaces in which the smoke gases flow unimpeded into the exhaust channel.

At the same time, by burning the captured dust particles, contamination of the foam material is prevented or at least limited. In order to obtain sufficient heating of the foam material to achieve the above results, the foam material is directed towards the fire place, whereby it is also heated by direct irradiation of the fuel bed.

10

In addition to filtering the combustion gases, another important advantage of the foam material in the application according to the present invention is that, after heating, it will act as a source of radiant heat with the result that the efficiency of the combustion can increase; after all, the fireplace will radiate more heat than when the flue gases enter the outlet directly. Here, too, it is advantageous that the foam material is directed at least partially toward the fire place; the radiant heat will thus be radiated towards the fire place, which can lead to an even better (more complete) combustion and moreover the radiant heat can be coupled out of the hearth via the usual way. The foam material feed-through should desirably be directed to the fire place so that it is irradiated by the fire present there, for this purpose the foam material serves without intervention of other objects, such as for example a flame baffle plate or other fireplace part, adjacent to the fire place, or worded differently forms part of the housing at least partially surrounding the fire place.

It is further noted that the foam material filter material can be used in fireplaces of varying capacities; for example, in wood-burning and atmospheric heating fires up to 25 kW but also in biomass fired fireplaces with a capacity of up to 500 kW.

Another substantial advantage of the hearth according to the present invention is that with the foam material (under the condition of a good seal of the foam material on the outlet) that a higher gas pressure can arise in the fireplace than on the outlet side of the ceramic. As a result, the residence time of the combustion gases in the fireplace is longer than when the foam material is absent. A longer residence time of the combustion gases in the fireplace will result in a better view of the combustion gases and the supplied air.

Effective heating of the foam material takes place in that the foam material is heated by both the transfer of heat from the flue gases and by the direct radiation from the fire place to the foam material. The heating by irradiation from the fire place is possible because the foam material feed-through is directed to, i.e. without the intervention of other objects directly adjacent to the fire place. The foam material is applied completely passively in this way and therefore requires no expensive and sensitive control.

The fireplace according to the invention does not have to be any more expensive than the existing fireplaces, but it does not require additional care in use either. Incidentally, it is again noted here that the term "hearth" in the context of this invention is understood to mean a fire place, which may or may not be completely enclosed, in particular fireplaces used for heating purposes.

The feed-through made of foam material can be at least partially made of a foam ceramic material, a foam metal material or a combination of these two materials.

20

In a preferred embodiment, the foam material feed-through is formed from at least one foam material plate. It is conceivable that the foam material feed-through is formed by a single plate, but it is also conceivable that this feed-through is defined by a plurality of plates which, for example, are adjacent to each other in a plane, which enclose angles with each other or which partially or completely overlap each other. A suitable solution can thus be selected depending on the geometry of the fireplace and the available foam material.

When selecting the foam material, material should be used that is sufficiently porous to allow the flue gases to pass through without too much resistance. In practice, foam material with a porosity between 5 - 50 PPI appears to yield good results. More in particular, foam material with a porosity of 10, 20 and 30 PPI has been found to be advantageous. This also creates the possibility of building up the foam material from multiple layers with mutually different porosity. Here 4 is for instance envisaged three adjoining layers with different porosity, such as for example a thinner layer of 30 PPI, a first supporting layer of 20 PPI and a second supporting layer of 10 PPI. The material with the finer porosity of PPI that can be made relatively thin has good properties as a radiation surface, while the less fine layers provide firmness and provide a subsequent filtering for the first finer foam material layer. Thus, the layer of the foam material closest to the hearth has the smallest cells. For the sake of clarity: with the foam material that has the smallest cells is meant the finer foam material that provides the greatest resistance to flow. The particles to be collected (fine dust) in wood-burning fireplaces have a size from 5μηι and the most common size is approximately 10 μηι.

In order to maximize the effect of cleaning and heat recovery, it is desirable if the exhaust for flue gases is shielded from the fire pit with the exception of the foam materials. As a result, the flue gases can only enter the outlet by passing the foam material. The flue gases are thus completely filtered through the foam material and the heat transfer from the flue gases to the foam material is also maximized.

The hearth can be arranged as desired for the combustion of solid fuel, (an example of this is, for example, a wood-burning hearth), but the hearth can also be arranged for the combustion of gases. An example of this is a natural gas-fired fireplace. On the other hand, it is also conceivable that the fireplace is arranged for firing different fuel types together or not.

25

The foam material that can be used advantageously is composed of one or more of the following ceramics: Zr ceramics containing zirconia (Zirconia), SiC ceramics containing silicon carbide (Carborundum), and Al ceramics containing aluminum oxide. Such types of foam ceramic are available commercially and are used in filtering liquid metals, among others. However, the definition of a ceramic is to be understood broadly in the context of this invention. Ceramic is defined here as inorganic non-metallic materials.

They are typically crystalline in structure and are typically compositions of metals and non-metallic elements. Examples are combinations of: aluminum and oxygen (Al 2 O 3); calcium and oxygen (CaO); and silicon and nitrogen (S13 N4).

In yet another embodiment variant, the foam material is detachably mounted in the fireplace 5. By detachably attaching the foam material to the hearth, it is possible to change it for other material under changed conditions of use and / or when the foam material is worn.

In order to further promote the cleaning of the flue gases, the foam material 10 can also carry a catalyst. More in particular, an oxidizing catalyst such as, for example, platinum, palladium, rhodium or gold is envisaged, but other catalysts can also be used advantageously depending on the conditions of use.

The present invention also provides a method for cleaning combustion gases from a hearth comprising the processing steps; heating the foam material by at least the direct irradiation of the foam material by the fire in the hearth; passing the combustion gases through a foam material to get rid of at least a part of the dust parts present in the combustion gases, and burning at least a part of the dust parts caught in the foam material as a result of the heating of the foam material. With this method, the advantages as previously described with reference to the fireplace according to the present invention can be realized. In particular, the combustion gases can be cleaned and a higher heating efficiency can be realized. To optimize the desired effect, all flue gases from the fireplace must be passed through the foam material.

The present invention will be further elucidated with reference to the non-limitative exemplary embodiments shown in the following figures. Herein: figure 1A shows a cut-away perspective view of a fireplace according to the present invention; figure 1B shows a cross section through a wall part of the fireplace shown in figure IA; figure 1C shows a top view of the wall part of the fireplace shown in figures IA and 1B; Figure 2A shows a top view of the alternative embodiment variant of a part of a wall part of the fireplace according to the present invention; figure 2B shows a top view of the wall part shown in figure 2A in a state in which it is provided with foam material plates; and figures 3A - 3D cross-sections through various embodiments of foam material plates for use in a fireplace according to the present invention.

Figure 1A shows a fireplace 1 with a fire place 2 that is partly surrounded by a housing 3. A drain 4 connects to the housing 3 through which the combustion gases can escape. Between the fire pit 2 and the outlet 4 there is a plate 5 with a central opening 6, which opening 6 is covered by a foam plate 7. The plate 5 herein functions both as a flame deflector plate, filter (including soot) and as a radiation panel. The combustion gases will flow through the foam plate 7 to the outlet 4, at which passage a part of the dust parts will remain in the foam plate 7. The foam plate 7 is also thereby heated, which heat will be partially radiated downwards, such that the heating efficiency of the hearth 1 is thereby promoted. Figure 1B shows a cross-section through the plate 5 and the foam plate 7. Herein it is also visible that the foam plate 7 can be built up from stacked layers 8, 9 of foam material 7 with different properties. Figure 1C shows the plate 5 and the foam material 7 in a frontal view.

Figures 2A and 2B show an alternative embodiment variant of a plate 20 which can be compared with the plate 5 from the previously shown hearth 1. The plate 20 is provided with a central opening 21 on either side of which corner profiles 22 are arranged between which (only in figure Foam material plates 23 shown in 2B can be slid. Two stops 24 prevent the foam material plates 23 from being pushed too far and to secure the foam material plates 23 in the retracted state, a recess 25 is provided in the plate 20 into which a releasable locking pin 26 can be inserted. The foam material plates 23 can be removed at will and optionally exchanged for other foam material plates (for example cleaner plants, foam ceramic plates, metal foam plates, plates composed of a combination of foam ceramic and metal foam and / or foam plates with other properties). Examples of foamed ceramic material are, for example, silicon carbide, magnesium oxide and aluminum oxide. On the other hand, the use of metal foam is also possible. These are foams made from metals, in particular - but not exclusively - aluminum and aluminum alloys. The foam plates 23 can, for example, have a length of 0.3 - 0.75 m and a width between 0.3 and 0.5 m and they can for instance be very well used up to hearth outputs of up to 500 kWth.

Figures 3A - 3D show cross-sections through different embodiments of foam plates 30, 31, 32, 33 for use in a fireplace 5 according to the invention. The foam plate 30 is composed of a uniform foam material, but the foam plate 31 consists of two different material layers 34, 35, the porosity of which, the material, and / or an optional additive such as a catalyst 15 may differ.

In figure 3C the foam plate 32 is designed with three different material layers 36, 37, 38, while figure 3D shows that it is also possible for a foam plate 33 to be provided with connecting segments 39, 40 of distinctive foam material.

Claims (15)

1. Fireplace comprising: - a fire pit, 5. a housing at least partially surrounding the fire pit, and - a flue gas outlet connecting to the housing, characterized in that the drain connects to the fire pit through a passage made of foam material, which passage made of foam material is directed to the fire place. 10
Fireplace according to claim 1, characterized in that the bushing made of foam material is at least partially made of a foam ceramic material.
Fireplace according to claim 1 or 2, characterized in that the bushing made of foam material is at least partially made of a foam metal material.
4. Hearth according to any one of the preceding claims, characterized in that the bushing made of foam material is formed from at least one foam material plate.
Fireplace according to claim 1 or 2, characterized in that the foam material has a porosity between 5 - 50 PPI. 25
Fireplace according to one of the preceding claims, characterized in that the foam material is made up of several layers with mutually different porosity.
7. Fireplace as claimed in claim 6, characterized in that the layer of the foam material closest to the fire place has the smallest cells.
8. Fireplace as claimed in any of the foregoing claims, characterized in that the discharge for flue gases is gas-tightly shielded from the fire place with the exception of the foam material passage.
9. Fireplace as claimed in any of the foregoing claims, characterized in that the fireplace is adapted for the combustion of solid fuel.
10. Fireplace as claimed in any of the foregoing claims, characterized in that the fireplace is adapted for the combustion of gases. 10
Fireplace according to any of the preceding claims, characterized in that the foam material comprises at least one or more of the following ceramics: Zr ceramics containing zirconia (Zirconia), SiC ceramics containing silicon carbide (Carborundum), and Al ceramics containing aluminum oxide contains. 15
12. Fireplace as claimed in any of the foregoing claims, characterized in that the foam material is detachably mounted in the fireplace.
13. Fireplace as claimed in any of the foregoing claims, characterized in that the foam material carries a catalyst.
14. Method for cleaning combustion gases from a hearth comprising the processing steps: A) heating a passage of foam material forming part of the hearth, by at least direct irradiation of the foam material by the fire in the hearth, B) passing the combustion gases through a foam material to rid it of at least a part of the dust particles present in the combustion gases, and
C) burning at least a part of the dust particles caught in the foam material as a result of the heating of the foam material.
A method according to claim 14, characterized in that all flue gases originating from the hearth are passed through the foam material.
NL2001058A 2007-12-05 2007-12-05 Fireplace and method for cleaning combustion gases from a fire. NL2001058C2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
NL2001058A NL2001058C2 (en) 2007-12-05 2007-12-05 Fireplace and method for cleaning combustion gases from a fire.
NL2001058 2007-12-05

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
NL2001058A NL2001058C2 (en) 2007-12-05 2007-12-05 Fireplace and method for cleaning combustion gases from a fire.
PCT/NL2008/050695 WO2009072875A1 (en) 2007-12-05 2008-11-05 Fireplace and method for cleaning combustion gases from a fireplace
EP20080857376 EP2225491A1 (en) 2007-12-05 2008-11-05 Fireplace and method for cleaning combustion gases from a fireplace

Publications (1)

Publication Number Publication Date
NL2001058C2 true NL2001058C2 (en) 2009-06-08

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Family Applications (1)

Application Number Title Priority Date Filing Date
NL2001058A NL2001058C2 (en) 2007-12-05 2007-12-05 Fireplace and method for cleaning combustion gases from a fire.

Country Status (3)

Country Link
EP (1) EP2225491A1 (en)
NL (1) NL2001058C2 (en)
WO (1) WO2009072875A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103759296A (en) * 2014-01-11 2014-04-30 孙长杰 Dual-body environment-friendly biomass boiler

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9523505B2 (en) * 2009-01-31 2016-12-20 Landy Vent Uk Limited Combustion apparatus
DE102009030265A1 (en) * 2009-06-18 2010-12-30 Manuela Linder Foam ceramic burner plate reverse
EP2306087A1 (en) * 2009-09-28 2011-04-06 PRAG Protective Rights GmbH & Co. KG Stove and filter cartridge for a stove
BE1018785A5 (en) * 2009-12-04 2011-08-02 Geerts Handmade Stoves Bvba HEATING DEVICE.

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0037281A2 (en) * 1980-04-02 1981-10-07 Corning Glass Works Solid fuel burning stove and catalytic converter
FR2548759A1 (en) * 1983-07-04 1985-01-11 Greneu Robert Accessory making it possible to obtain virtually total combustion of the fuels in appliances for heating and production of hot water or the like
DE9320675U1 (en) * 1993-08-23 1995-06-01 Huels Uwe Device for exhaust gas cleaning, especially in wood and coal fireplaces
EP1146286A1 (en) * 1999-11-22 2001-10-17 Maejima, Fumio Incinerator with ceramic filter
EP1353125A1 (en) * 2002-04-03 2003-10-15 Fraunhofer-Gesellschaft Zur Förderung Der Angewandten Forschung E.V. Apparatus and method for treating exhaust gases from solid fuel fire places
EP1906090A2 (en) * 2006-09-26 2008-04-02 Robert Bosch GmbH Exhaust gas purification facility with a fine dust filter for biomass heating installation

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2315663B2 (en) * 1973-03-29 1975-08-21 Alfons 6639 Siersburg Blanchebarbe
US4582045A (en) * 1981-12-17 1986-04-15 Dorau Warren G Heating apparatus

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0037281A2 (en) * 1980-04-02 1981-10-07 Corning Glass Works Solid fuel burning stove and catalytic converter
FR2548759A1 (en) * 1983-07-04 1985-01-11 Greneu Robert Accessory making it possible to obtain virtually total combustion of the fuels in appliances for heating and production of hot water or the like
DE9320675U1 (en) * 1993-08-23 1995-06-01 Huels Uwe Device for exhaust gas cleaning, especially in wood and coal fireplaces
EP1146286A1 (en) * 1999-11-22 2001-10-17 Maejima, Fumio Incinerator with ceramic filter
EP1353125A1 (en) * 2002-04-03 2003-10-15 Fraunhofer-Gesellschaft Zur Förderung Der Angewandten Forschung E.V. Apparatus and method for treating exhaust gases from solid fuel fire places
EP1906090A2 (en) * 2006-09-26 2008-04-02 Robert Bosch GmbH Exhaust gas purification facility with a fine dust filter for biomass heating installation

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103759296A (en) * 2014-01-11 2014-04-30 孙长杰 Dual-body environment-friendly biomass boiler

Also Published As

Publication number Publication date
EP2225491A1 (en) 2010-09-08
WO2009072875A1 (en) 2009-06-11

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