WO1989001116A1 - COMBUSTION PROCESS AND GAS BURNER WITH LOW NOx, CO EMISSION - Google Patents
COMBUSTION PROCESS AND GAS BURNER WITH LOW NOx, CO EMISSION Download PDFInfo
- Publication number
- WO1989001116A1 WO1989001116A1 PCT/IT1987/000079 IT8700079W WO8901116A1 WO 1989001116 A1 WO1989001116 A1 WO 1989001116A1 IT 8700079 W IT8700079 W IT 8700079W WO 8901116 A1 WO8901116 A1 WO 8901116A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- burner
- small
- slots
- groups
- burner according
- Prior art date
Links
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
- F23D14/46—Details, e.g. noise reduction means
- F23D14/62—Mixing devices; Mixing tubes
- F23D14/64—Mixing devices; Mixing tubes with injectors
-
- 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
- F23D14/04—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone induction type, e.g. Bunsen burner
- F23D14/10—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone induction type, e.g. Bunsen burner with elongated tubular burner head
- F23D14/105—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone induction type, e.g. Bunsen burner with elongated tubular burner head with injector axis parallel to the burner head axis
-
- 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
- F23D14/48—Nozzles
- F23D14/58—Nozzles characterised by the shape or arrangement of the outlet or outlets from the nozzle, e.g. of annular configuration
Definitions
- This invention regards a process and equipment to obtain th combustion of gas by means of an atmospheric burner.
- Several kinds o burners are known: for solid, liquid and gaseous fuels.
- the burners for gaseous fuels are divided into fan assisted burner and atmospheric burners.
- the atmospheric burner an imperfect combustion may occur with harmful emissions of carbo monoxide and nitric oxides, which cause atmospheric pollution.
- the object of this invention is a process and an equipment to obtai a combustion having a very low level of harmful emissions of at leas 40 of gas capacity per square cm of combustion chamber measured i a plan view.
- This object has been reached by obtaining a plurality of small flam which become violet when combusting natural gas, that means in t visible spectrum radiations with a wave length, below 0,42 micron.
- the above is obtained by acting so that the quantity of primary ai inducted inside the burner from the gas jet by means of the sucti tube, usually a Venturi tube, reaches at least 80% of the a stoichiometrically required for combustion; and by acting so that t secondary air laps all sides of every single small flame of t plurality of small flames which come out from the burner's body, in zone close to the external surface of the burner so as to swell ea flame making its width at least as big as its height; and/or alternatively by increasing the contact surface between flame and secondary a right from the first combustion steps, thus producing a small fla with two divergent wings, similar to "butterfly wings".
- the atmospheric burner according to the present invention has specific combustion capacity which never exceeds 1,1 KW for each c of the ports area on the burner's body.
- the sucked air gas mixture maintains a uniform acceleration throu the Venturi tube mouthpiece, which has a parabolic form without sha edges; besides that the maximum average mixture speed must not exce 4,5 m/sec, preferably4,l m/sec.
- the burner's bo sections are wide enough to maintain the average speed of the mixtu lower than 2,5 m/sec, preferably 2 m/sec.
- th latter should be slightly bent compared to the injector axis, order to obtain concentricity with the real diverted mixture flow.
- louvers are open obtain a gradual backflow.
- these louvers are open the Venturi tube in zones far from the flame ports of the burner' body.
- the upper part of the burner's body, where the slots i small groups are located has a bending radius bigger to the one the lower part.
- the number of slots in each group of a row decreas towards the burner's vertical symmetry plane.
- the slots c be parallel to each other.
- small groups are created by slots of differe lengths, outwards decreasing, for example the area occupied by small group can be a rhombus. This is favorable in general a particularly with a chess-board configuration.
- the ro made up of small groups are longitudinally located at a variab distance. It is also possible to vary the distance among the grou of a single row. Moreover each group can have a different ports are
- the flame lift preventing holes are numerous and at a certain mutu distance according to need.
- the may be placed at t apexes of a square and/or equilateral triangle at a distance of 1 to 1,5 mm, preferably 1,4 mm.
- Fig. 1 shows a longitudinal sectional view of a burner
- Fig. 2 shows a cross-sectional view along the line A-A in figure 1;
- Figs. 3a and 3b show views of possible variations in the slot grou
- Fig. 4 shows a view of a possible arrangement of the slot groups
- Fig. 5 shows a variant of figure 4.
- Fig. 6 shows a plan view of the upper part of a burner
- Fig. 7 shows a side view of a variant of the burner in figure 6;
- Figs. 8 and 9 show variants of fig. 2;
- Figs. 10a, 10b, 10c and lOd show views of possible variants of t sub-groups of holes in which the mutual positions of a sub-group slots and a sub-group of holes is shown.
- Figures 1 and 2 show a burner consisting of a burner body containing inside it a Venturi tube 2, which has a smoot funnel-shaped mouthpiece 3 with a parabolic form.
- the Venturi tube leaves a free area (hatched in figure 2, 8 and 9) inside the burn body 1, such as to give an average air/gas mixture speed n exceeding 2m/sec.
- the upper part of the burner body has holes out which comes a series of small flames F.
- the section of the burn body 1 where the holes are located is convex, with a bending radi greater than the bending radius of the lower part.
- the holes consi of small groups 5 of slots 7, each consisting of two sub-groups forming a flame F with two wings (fig. 7) .
- the small groups 5 a arranged in rows 8 perpendicular to the burner axis 10. Flame li preventing holes 6 are provided between the various small groups (Figs. 10a to lOd).
- the rows of small groups can be arrang alongside one another with the small groups lined up as shown figure 4, the distance "a" between the small groups 5 in this ca being at least 0.65b, where "b” is the maximum length of the slots a group, while the distance "c” between the rows is at least nd/ where "n” is the number of small groups making up the row and "d” the width of the totality of slots 7 forming a small group
- the rows 8 of small groups 5 can be offset with respe of rows 8' , as shown in figure 5.
- the distances "a” and “c” must comply with t conditions described earlier; "n” in this case is the sum of t small groups in the two adjacent, offset rows 8 and 8'.
- the distan between the sub-groups 4 of each small group 5 is 2.4 - 2.8 mm.
- Each sub-group may consist of slots 7, equal in length and parall (figures 3a, 4 and 6); the number of slots can be two, three or fou
- the sub-group (fig. 3b) may consist of slots 7' different lengths (decreasing from the center of the group outward so that the area occupied by each group corresponds to a rhombus. this case the number of slots making up the sub-group may be tw three, four or a maximum of five.
- Tfre flame lift preventing holes 6 can be arranged as illustrated figures 10a to lOd, i.e at the apexes of a square and/or an ide equilateral triangle, their center distance I being from 1.3 to 1 mm., preferably 1.4 mm.
- Louvers 12 are provided far from small groups 5 in order distribute the backflow along the burner body 1.
- the particular shap and colour of the flame makes it possible to achieve combustion of high capacity of gas - 40 W per square cm of combustion chambe measured in a plan view - with a very low level of harmful emissions
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Gas Burners (AREA)
- Catalysts (AREA)
Abstract
Description
Claims
Priority Applications (9)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BR8707991A BR8707991A (en) | 1987-08-03 | 1987-08-03 | COMBUSTION AND GAS BURNER PROCESS WITH A VERY LOW LEVEL OF HARMFUL EMISSION NOX, CO. |
PCT/IT1987/000079 WO1989001116A1 (en) | 1987-08-03 | 1987-08-03 | COMBUSTION PROCESS AND GAS BURNER WITH LOW NOx, CO EMISSION |
RO144062A RO114675B1 (en) | 1987-08-03 | 1987-08-03 | METHOD AND BURNER FOR BURNING NATURAL GASES WITH LOW NOx, CO EMISSION |
AT87905268T ATE95905T1 (en) | 1987-08-03 | 1987-08-03 | COMBUSTION PROCESS AND GAS BURNER WITH LOW NOX, CO EMISSION. |
DE87905268T DE3787810T2 (en) | 1987-08-03 | 1987-08-03 | COMBUSTION PROCESS AND GAS BURNER WITH LOW NOx, CO EMISSION. |
EP87905268A EP0373157B1 (en) | 1987-08-03 | 1987-08-03 | Combustion process and gas burner with low nox, co emission |
JP62504912A JPH0617729B2 (en) | 1987-08-03 | 1987-08-03 | Gas burner with low emissions of nitrogen oxides and carbon monoxide |
AU78091/87A AU627146B2 (en) | 1987-08-03 | 1987-08-03 | Combustion process and gas burner with low nox,co emission |
SU904743087A RU2002994C1 (en) | 1987-08-03 | 1990-02-02 | Method of and atmospheric burner for burning gas |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/IT1987/000079 WO1989001116A1 (en) | 1987-08-03 | 1987-08-03 | COMBUSTION PROCESS AND GAS BURNER WITH LOW NOx, CO EMISSION |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1989001116A1 true WO1989001116A1 (en) | 1989-02-09 |
Family
ID=11330724
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/IT1987/000079 WO1989001116A1 (en) | 1987-08-03 | 1987-08-03 | COMBUSTION PROCESS AND GAS BURNER WITH LOW NOx, CO EMISSION |
Country Status (9)
Country | Link |
---|---|
EP (1) | EP0373157B1 (en) |
JP (1) | JPH0617729B2 (en) |
AT (1) | ATE95905T1 (en) |
AU (1) | AU627146B2 (en) |
BR (1) | BR8707991A (en) |
DE (1) | DE3787810T2 (en) |
RO (1) | RO114675B1 (en) |
RU (1) | RU2002994C1 (en) |
WO (1) | WO1989001116A1 (en) |
Cited By (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2654190A1 (en) * | 1989-11-06 | 1991-05-10 | Coussement Bruno | BURNER FOR GASEOUS FUEL. |
WO1992001196A1 (en) * | 1990-07-06 | 1992-01-23 | Worgas Bruciatori S.R.L. | Methods and apparatus for gas combustion |
WO1992012381A1 (en) * | 1991-01-07 | 1992-07-23 | Ruhrgas Aktiengesellschaft | Gas burner and method of operating it |
WO1992019920A1 (en) * | 1989-11-06 | 1992-11-12 | Bruno Coussement | Boiler for central heating and/or sanitary hot water production, burner for gas fuel, and installation for central heating and sanitary hot water production using said boiler |
EP0589852A1 (en) * | 1992-09-24 | 1994-03-30 | FERROLI S.p.A. | Atmospheric gas burner with a combustion producing low amounts of nitrogen and carbon oxides |
EP0773404A2 (en) * | 1995-11-09 | 1997-05-14 | Robert Bosch Gmbh | Burner |
EP0854322A3 (en) * | 1997-01-21 | 1999-06-09 | Burner Systems International, Inc. | Premixed gas burner |
WO1999035439A1 (en) * | 1998-01-02 | 1999-07-15 | Worgas Bruciatori S.R.L. | Tubular burner |
EP0949453A2 (en) * | 1998-04-08 | 1999-10-13 | Rinnai Kabushiki Kaisha | Burner plate |
WO2004031663A1 (en) * | 2002-10-02 | 2004-04-15 | Tecnoclima S.P.A. | Hot air generator |
WO2008142531A2 (en) * | 2007-05-21 | 2008-11-27 | Worgas - Bruciatori - S.R.L. | Modulating burner |
WO2012123805A1 (en) * | 2011-03-11 | 2012-09-20 | Bertelli & Partners S.R.L. | Improved gas burner for premixed combustion |
DE202016105039U1 (en) * | 2016-09-12 | 2017-09-14 | Viessmann Werke Gmbh & Co Kg | gas burner |
EP4008954A3 (en) * | 2020-12-07 | 2022-10-12 | Vaillant GmbH | Burner assembly for combustion of hydrogen-containing fuel gas and burner body |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IT1270078B (en) | 1994-07-08 | 1997-04-28 | Worgas Bruciatori Srl | PERFECTED DIFFUSER GAS BURNER |
IT1294552B1 (en) | 1997-07-07 | 1999-04-12 | Worgas Bruciatori Srl | METHOD FOR REDUCING CO AND NO2 EMISSIONS IN HEATING APPLIANCES, AND RELATED APPLIANCES. |
IT1310175B1 (en) | 1999-02-18 | 2002-02-11 | Worgas Bruciatori Srl | PERFECTED BURNER |
MD1608C2 (en) * | 2000-08-07 | 2001-08-31 | Intreprinderea De Stat Firma Stiintifica De Producere "Alco-N" | Air heating installation for tobacco drying chamber |
EP2693117A1 (en) | 2012-07-30 | 2014-02-05 | Alstom Technology Ltd | Reheat burner and method of mixing fuel/carrier air flow within a reheat burner |
BR102012033236A2 (en) * | 2012-12-26 | 2014-08-26 | Whirlpool Sa | HEATING SYSTEM BASED ON GAS FUEL BURNING |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2132968A1 (en) * | 1970-07-04 | 1972-01-13 | Guiseppe Fogliani | Gas burner |
EP0009831A2 (en) * | 1978-07-28 | 1980-04-16 | Aldo Polidoro | Atmospheric gas burner with groups of vents for the passage of the mixture of combustible gas and combustion air |
EP0217470A1 (en) * | 1985-10-03 | 1987-04-08 | Nederlandse Industriele Maatschappij NEFIT B.V. | Burner for a gas boiler or the like |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5596816A (en) * | 1978-01-05 | 1980-07-23 | Matsushita Electric Ind Co Ltd | Gas burner |
IT1162232B (en) * | 1978-07-28 | 1987-03-25 | Polidoro Aldo | GAS BURNER, PARTICULARLY FOR LIQUID GASES, WITH CLOSE GROUPS OF FORIMOLTO EFFECT OF THE MIXTURE COMBUSTIBLE GAS-PRIMARY COMBUSTION AIR |
JPS5752501U (en) * | 1980-07-22 | 1982-03-26 | ||
JPS60159515A (en) * | 1984-01-27 | 1985-08-21 | Hitachi Ltd | Furnace system |
DE8503838U1 (en) | 1985-02-08 | 1986-02-13 | Joh. Vaillant Gmbh U. Co, 5630 Remscheid | Series burner for a gas-fired device |
-
1987
- 1987-08-03 AU AU78091/87A patent/AU627146B2/en not_active Ceased
- 1987-08-03 BR BR8707991A patent/BR8707991A/en not_active IP Right Cessation
- 1987-08-03 EP EP87905268A patent/EP0373157B1/en not_active Expired - Lifetime
- 1987-08-03 AT AT87905268T patent/ATE95905T1/en not_active IP Right Cessation
- 1987-08-03 JP JP62504912A patent/JPH0617729B2/en not_active Expired - Fee Related
- 1987-08-03 DE DE87905268T patent/DE3787810T2/en not_active Expired - Fee Related
- 1987-08-03 RO RO144062A patent/RO114675B1/en unknown
- 1987-08-03 WO PCT/IT1987/000079 patent/WO1989001116A1/en active IP Right Grant
-
1990
- 1990-02-02 RU SU904743087A patent/RU2002994C1/en not_active IP Right Cessation
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2132968A1 (en) * | 1970-07-04 | 1972-01-13 | Guiseppe Fogliani | Gas burner |
EP0009831A2 (en) * | 1978-07-28 | 1980-04-16 | Aldo Polidoro | Atmospheric gas burner with groups of vents for the passage of the mixture of combustible gas and combustion air |
EP0217470A1 (en) * | 1985-10-03 | 1987-04-08 | Nederlandse Industriele Maatschappij NEFIT B.V. | Burner for a gas boiler or the like |
Cited By (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2654190A1 (en) * | 1989-11-06 | 1991-05-10 | Coussement Bruno | BURNER FOR GASEOUS FUEL. |
EP0427650A1 (en) * | 1989-11-06 | 1991-05-15 | Coussement, Bruno | Burner for gaseous fuel |
WO1992019920A1 (en) * | 1989-11-06 | 1992-11-12 | Bruno Coussement | Boiler for central heating and/or sanitary hot water production, burner for gas fuel, and installation for central heating and sanitary hot water production using said boiler |
WO1992001196A1 (en) * | 1990-07-06 | 1992-01-23 | Worgas Bruciatori S.R.L. | Methods and apparatus for gas combustion |
US5385467A (en) * | 1990-07-06 | 1995-01-31 | Worgas Bruciatori S.R.L. | Methods and apparatus for gas combustion |
AU662485B2 (en) * | 1990-07-06 | 1995-09-07 | Worgas Bruciatori S.R.L. | Methods and apparatus for gas combustion |
WO1992012381A1 (en) * | 1991-01-07 | 1992-07-23 | Ruhrgas Aktiengesellschaft | Gas burner and method of operating it |
EP0589852A1 (en) * | 1992-09-24 | 1994-03-30 | FERROLI S.p.A. | Atmospheric gas burner with a combustion producing low amounts of nitrogen and carbon oxides |
EP0773404A2 (en) * | 1995-11-09 | 1997-05-14 | Robert Bosch Gmbh | Burner |
EP0773404A3 (en) * | 1995-11-09 | 1999-01-13 | Robert Bosch Gmbh | Burner |
EP0854322A3 (en) * | 1997-01-21 | 1999-06-09 | Burner Systems International, Inc. | Premixed gas burner |
WO1999035439A1 (en) * | 1998-01-02 | 1999-07-15 | Worgas Bruciatori S.R.L. | Tubular burner |
EP0949453A2 (en) * | 1998-04-08 | 1999-10-13 | Rinnai Kabushiki Kaisha | Burner plate |
EP0949453A3 (en) * | 1998-04-08 | 2000-02-23 | Rinnai Kabushiki Kaisha | Burner plate |
WO2004031663A1 (en) * | 2002-10-02 | 2004-04-15 | Tecnoclima S.P.A. | Hot air generator |
WO2008142531A2 (en) * | 2007-05-21 | 2008-11-27 | Worgas - Bruciatori - S.R.L. | Modulating burner |
WO2008142531A3 (en) * | 2007-05-21 | 2009-08-27 | Worgas - Bruciatori - S.R.L. | Modulating burner |
WO2012123805A1 (en) * | 2011-03-11 | 2012-09-20 | Bertelli & Partners S.R.L. | Improved gas burner for premixed combustion |
CN103443544A (en) * | 2011-03-11 | 2013-12-11 | 贝尔泰利联合公司 | Improved gas burner for premixed combustion |
DE202016105039U1 (en) * | 2016-09-12 | 2017-09-14 | Viessmann Werke Gmbh & Co Kg | gas burner |
EP4008954A3 (en) * | 2020-12-07 | 2022-10-12 | Vaillant GmbH | Burner assembly for combustion of hydrogen-containing fuel gas and burner body |
Also Published As
Publication number | Publication date |
---|---|
BR8707991A (en) | 1990-05-22 |
AU627146B2 (en) | 1992-08-20 |
DE3787810D1 (en) | 1993-11-18 |
ATE95905T1 (en) | 1993-10-15 |
EP0373157A1 (en) | 1990-06-20 |
DE3787810T2 (en) | 1994-04-14 |
AU7809187A (en) | 1989-03-01 |
JPH02501496A (en) | 1990-05-24 |
EP0373157B1 (en) | 1993-10-13 |
RO114675B1 (en) | 1999-06-30 |
RU2002994C1 (en) | 1993-11-15 |
JPH0617729B2 (en) | 1994-03-09 |
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