GB2259566A - Improved burner,particularly suitable for wall-mounted boilers - Google Patents
Improved burner,particularly suitable for wall-mounted boilers Download PDFInfo
- Publication number
- GB2259566A GB2259566A GB9217627A GB9217627A GB2259566A GB 2259566 A GB2259566 A GB 2259566A GB 9217627 A GB9217627 A GB 9217627A GB 9217627 A GB9217627 A GB 9217627A GB 2259566 A GB2259566 A GB 2259566A
- Authority
- GB
- United Kingdom
- Prior art keywords
- burner
- substantially spherical
- spherical elements
- mixture
- wall
- 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
Links
- 238000002485 combustion reaction Methods 0.000 claims abstract description 17
- 239000000203 mixture Substances 0.000 claims abstract description 12
- 239000002184 metal Substances 0.000 claims abstract description 5
- 239000002737 fuel gas Substances 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 2
- 229910010293 ceramic material Inorganic materials 0.000 claims 1
- 239000000919 ceramic Substances 0.000 abstract description 5
- 238000011144 upstream manufacturing Methods 0.000 description 4
- 239000007789 gas Substances 0.000 description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 210000000748 cardiovascular system Anatomy 0.000 description 1
- 230000002939 deleterious effect Effects 0.000 description 1
- 230000002526 effect on cardiovascular system Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- VUZPPFZMUPKLLV-UHFFFAOYSA-N methane;hydrate Chemical compound C.O VUZPPFZMUPKLLV-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 210000004400 mucous membrane Anatomy 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 230000010349 pulsation Effects 0.000 description 1
- 210000005227 renal system Anatomy 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/02—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
- F23D14/72—Safety devices, e.g. operative in case of failure of gas supply
- F23D14/82—Preventing flashback or blowback
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D2210/00—Noise abatement
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D2900/00—Special features of, or arrangements for burners using fluid fuels or solid fuels suspended in a carrier gas
- F23D2900/14—Special features of gas burners
- F23D2900/14582—Special features of gas burners with outlets consisting of layers of spherical particles
Abstract
A burner (1), particularly suitable for wall-mounted boilers, comprises an air-gas mixing chamber (4) separated by a wail with perforations (6) from an open-topped chamber (5) which is filled with small substantially spherical elements (7), preferably of ceramic, through the interstices of which the mixture is made to flow and above which the combustion takes place. The spheres may be of ceramic or metal, of one or different sizes and separate or welded together at their contact points. <IMAGE>
Description
A4 r IMPROVED BURNER, PARTICULARLY SUITABLE FOR WALL-MOUNITED BOILERS This
invention relates to a burner which by providing perfect and economical air-gas mixing with very low pressure drop, perfect mixture velocity distribution within the combustion zone, very low mixture volume upstream of said combustion zone, no possibility of self- induced noise and total absence of abnormal deformation in said combustion zone. results in rational. effective. silent and reliable operation with minimum environmental pollution.
As is well known, boilers for central heatin.- and;or for domestic hot water production. whether of floor or wall mounted. induced or forced draught. or natural gas or LPG-burning type. give rise to combustion products which are among the most common causes of atmospheric pollution. In this respect. in addition to carbon dioxide and water vapour, such combustion products because of the non- uniformity of the flame. which comprises a central very rich mixture region of very high temperature. also contain nitrogen oxides which not only irritate the eyes and the nasal mucous membrane hut also have negative effects on the cardiovascular and renal sYstem, and are also a calise of the well when atmospheric moisture is present.
In order to limit the formation of these it is necessary to limit the combustion temperature. this being substantially achieved by pre-mixing the air and fuel to form a uniform sufficiently weak mixture. ie with a minimum air excess over the stoichiometric quantity, able to burn correctlv but at 5 the lowest possible temperature. For this purpose the burner commonly comprises an airigas mixing region with excess air. a mixture expansion and distribution region and a metal grid beyond which combustion takes place. This known type of burner has however a series of drawbacks of which the most serious is determined by the thermal deformation of the grid which occurs in particular at low loads. when the flame practically touches the grid. Other drawbacks include the difficulty of achieving good airgas mixing and of uniformly distributing the mixture upstream of the combustion grid. the imminent danger of explosion if the flame returns through the grid perforations because of the presence of a large volume of combustible mixture upstream of said grid, and a high noise level due to pressure pulsations self-induced within the burner by the mixingl'flame interaction.
Expedients for obviating some of these drawbacks are already known in the current state of the art: for example. to prevent combustion grid deformation ceramic grids or metal grids pro,ided with a li--ht thermal screening covering have been used: again. good air-gas mixing and uniform mixture distribution can be obtained at the expense of high pressure drop bv apr)rrprl..tte costIv deviators and fans. However. none of the burners known in the art is current]-, abi.. to obviate all the aforesaid drawbacks by economical and rational means. this being the object of the present invention. This is achieved in practice in that the burner. comprising a fuel gas feed duct, a combustion air feed duct and a mixing chamber, is provided upperly. according to one characteristic of the present invention, with a lowerly perforated and upperly open chamber filled with small substantially spherical elements which can be of ceramic or other metal or non-metal material and of the same or different dimensions. through the interstices of which the mixture 10 is made to flow and above which the combustion takes place. In this manner perfect mixing and uniform mixture distribution are ensured by the sinuous paths through the interstices of the substantially spherical elements which the gas and air now have- to take, the presence of said elements substantially reducing the volume of flammable material present upstream of the combustion zone and hence the danger of any flame return. Again. as a grid is no longer present there is no deleterious deformation within the combustion zone. in which the substantially spherical elements are free to expand without any restraint. and in addition. as experimental trials have amply demonstrated. the system does not allow noise self-inducement with the result that the burner is totally silent under any load condition. According to preferred embodiments of the invention said small substantially spherical elements are held to-gether either by a suitable cont.iiner provided lowerly with perforations or b-.. welding at: ths.lr points of contact te, form:i sirilc. of substantially spherical elements.
ria C'K.
The invention is described in detail hereinafter with reference to the accompanYing drawing. which illustrates a preferred embodiment thereof given by way of non-limiting example in that technical or constructional modifications can be made thereto but without leaving the scope of the present invention. In said drawing. 1 indicates overall a burner provided with a fuel gas feed duct 2. a combustion air feed duct 3 and a mixing chamber 4. Said burner 1 is provided upperly with a chamber 5 which is open at its top and is provided with perforations 6 at its base, said chamber being filled with small spherical or substantially 7 spherical ceramic elements/of the same size. they being welded together at their points of contact to form a single "noi-l.-at" pack of spherical elements 7.
Claims (8)
1. A burner comprising a fuel gas feed duct, a combustion air feed duct and a mixing chamber, the burner being provided upperly with a lowerly perforated and upperly open chamber containing substantially spherical elements through the interstices of which in use the mixture is made to flow and above which in use the combustion takes place.
2. A burner as claimed in claim 1, wherein said substantially spherical elements are held together by a container provided lowerly with perforations.
3. A burner as claimed in claim 1, wherein said substantially spherical elements are held together by welding at their points of contact to form a single "nougaC pack of substantially spherical elements.
4. A burner as claimed in any of claims 1 to 3, wherein said substantially spherical elements are of ceramic material.
5. A burner as claimed in any of claims 1 to 3, wherein said substantially spherical elements are of metal.
6. A burner as claimed in any of claims 1 to 5, wherein said substantially spherical elements are of the same size. 25
7. A burner as claimed in any of claims 1 to 5, wherein said substantially spherical elements are of different size.
8. A burner as claimed in claim 1, substantially as hereinbefore described with reference to, and as shown in, the drawings.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ITMI912368A IT1251560B (en) | 1991-09-06 | 1991-09-06 | PERFECTED BURNER, PARTICULARLY SUITABLE FOR WALL BOILERS |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB9217627D0 GB9217627D0 (en) | 1992-09-30 |
| GB2259566A true GB2259566A (en) | 1993-03-17 |
| GB2259566B GB2259566B (en) | 1995-05-10 |
Family
ID=11360621
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9217627A Expired - Fee Related GB2259566B (en) | 1991-09-06 | 1992-08-19 | Central heating or domestic hot water boiler |
Country Status (8)
| Country | Link |
|---|---|
| BE (1) | BE1005472A3 (en) |
| DE (1) | DE4229070A1 (en) |
| ES (1) | ES2062913B1 (en) |
| FR (1) | FR2681126A1 (en) |
| GB (1) | GB2259566B (en) |
| IT (1) | IT1251560B (en) |
| NL (1) | NL9201558A (en) |
| PT (1) | PT100837A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5591025A (en) * | 1995-07-24 | 1997-01-07 | Invernizzi; Gianmario | Combustion head, in particular for gas burners |
| EP0754909A1 (en) * | 1995-07-21 | 1997-01-22 | Gianmario Invernizzi | Combustion head, in particular for gas burners |
| DE10220155A1 (en) * | 2001-07-31 | 2003-11-13 | Rolf Kresel | Gas burner, for a central heating system, has a porous body with two zones for mixing the combustion air and fuel gas, and a porous combustion zone to prevent gas losses on starting up |
| US7371065B2 (en) | 2002-09-13 | 2008-05-13 | Deutsches Zentrum Fur Luft -Und Raumfahrt E.V. | Apparatus and method for the controlled production of nano-soot particles |
| CN103528062A (en) * | 2013-09-25 | 2014-01-22 | 杭州电子科技大学 | Combustion radiator of blast rotation pre-mixed porous medium gas stove and combustion method thereof |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102005026299A1 (en) * | 2005-06-08 | 2006-12-28 | Robert Bosch Gmbh | Premixing gas burner |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1395043A (en) * | 1971-04-26 | 1975-05-21 | Sundberg Ab C A | Gas burners |
| GB2155613A (en) * | 1984-03-06 | 1985-09-25 | Allday & Co Ltd William | Forge hearth burner assembly |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE401837C (en) * | 1923-04-17 | 1924-09-09 | Si Da Deutsche Gasgluehlicht I | Heating burner |
| FR648608A (en) * | 1928-02-10 | 1928-12-12 | Mixer, regulator and fluid distributor | |
| US2528738A (en) * | 1944-11-27 | 1950-11-07 | Chrysler Corp | Fuel burner flame plate |
| DE2036510A1 (en) * | 1969-08-07 | 1971-02-18 | C.A.V. Ltd., Birmingham (Grossbritannien) | Burner for a fuel / air mixture |
| US3947233A (en) * | 1971-04-26 | 1976-03-30 | C. A. Sundberg Ab | Free-burning equipment |
| US3925024A (en) * | 1971-09-10 | 1975-12-09 | Borden Inc | Grid burner system |
| US4311456A (en) * | 1980-07-18 | 1982-01-19 | Bricmont & Associates, Inc. | Blast furnace stove |
| DE3611909C3 (en) * | 1986-04-09 | 2000-03-16 | Ruhrgas Ag | Device for controlling the amount and / or the mixing ratio of a fuel gas-air mixture |
| JPS62258917A (en) * | 1986-04-18 | 1987-11-11 | Miura Co Ltd | Combustion promoting body for surface combustion consisting of ceramic particles |
| JPH01121609A (en) * | 1987-11-05 | 1989-05-15 | Miura Co Ltd | Burner head assembly for surface combustion |
| JPH02272218A (en) * | 1988-05-27 | 1990-11-07 | Miura Co Ltd | Flame stabilizing plate for premixing gas burner |
| GB8825515D0 (en) * | 1988-11-01 | 1988-12-07 | Shell Int Research | Gas burner with premixing/preheating zone |
-
1991
- 1991-09-06 IT ITMI912368A patent/IT1251560B/en active IP Right Grant
-
1992
- 1992-08-19 GB GB9217627A patent/GB2259566B/en not_active Expired - Fee Related
- 1992-08-26 BE BE9200756A patent/BE1005472A3/en not_active IP Right Cessation
- 1992-09-01 DE DE4229070A patent/DE4229070A1/en not_active Ceased
- 1992-09-03 FR FR9210532A patent/FR2681126A1/en active Pending
- 1992-09-04 PT PT100837A patent/PT100837A/en not_active Application Discontinuation
- 1992-09-04 ES ES09201899A patent/ES2062913B1/en not_active Expired - Lifetime
- 1992-09-07 NL NL9201558A patent/NL9201558A/en not_active Application Discontinuation
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1395043A (en) * | 1971-04-26 | 1975-05-21 | Sundberg Ab C A | Gas burners |
| GB2155613A (en) * | 1984-03-06 | 1985-09-25 | Allday & Co Ltd William | Forge hearth burner assembly |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0754909A1 (en) * | 1995-07-21 | 1997-01-22 | Gianmario Invernizzi | Combustion head, in particular for gas burners |
| US5591025A (en) * | 1995-07-24 | 1997-01-07 | Invernizzi; Gianmario | Combustion head, in particular for gas burners |
| DE10220155A1 (en) * | 2001-07-31 | 2003-11-13 | Rolf Kresel | Gas burner, for a central heating system, has a porous body with two zones for mixing the combustion air and fuel gas, and a porous combustion zone to prevent gas losses on starting up |
| US7371065B2 (en) | 2002-09-13 | 2008-05-13 | Deutsches Zentrum Fur Luft -Und Raumfahrt E.V. | Apparatus and method for the controlled production of nano-soot particles |
| CN103528062A (en) * | 2013-09-25 | 2014-01-22 | 杭州电子科技大学 | Combustion radiator of blast rotation pre-mixed porous medium gas stove and combustion method thereof |
| CN103528062B (en) * | 2013-09-25 | 2015-10-28 | 杭州电子科技大学 | The fire radiant of the rotary premixed porous-medium gas hot stove of air blast and combustion method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| BE1005472A3 (en) | 1993-08-03 |
| ES2062913B1 (en) | 1997-06-16 |
| DE4229070A1 (en) | 1993-03-11 |
| ITMI912368A1 (en) | 1993-03-06 |
| PT100837A (en) | 1994-05-31 |
| IT1251560B (en) | 1995-05-17 |
| FR2681126A1 (en) | 1993-03-12 |
| ES2062913A2 (en) | 1994-12-16 |
| GB2259566B (en) | 1995-05-10 |
| ITMI912368A0 (en) | 1991-09-06 |
| GB9217627D0 (en) | 1992-09-30 |
| ES2062913R (en) | 1996-12-01 |
| NL9201558A (en) | 1993-04-01 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19960819 |