CA2031228A1 - Method for the codmbustion of fuel by stepped fuel feed and burner for use with it - Google Patents
Method for the codmbustion of fuel by stepped fuel feed and burner for use with itInfo
- Publication number
- CA2031228A1 CA2031228A1 CA 2031228 CA2031228A CA2031228A1 CA 2031228 A1 CA2031228 A1 CA 2031228A1 CA 2031228 CA2031228 CA 2031228 CA 2031228 A CA2031228 A CA 2031228A CA 2031228 A1 CA2031228 A1 CA 2031228A1
- Authority
- CA
- Canada
- Prior art keywords
- fuel
- combustion
- primary
- zone
- burner
- 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.)
- Abandoned
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C6/00—Combustion apparatus characterised by the combination of two or more combustion chambers or combustion zones, e.g. for staged combustion
- F23C6/04—Combustion apparatus characterised by the combination of two or more combustion chambers or combustion zones, e.g. for staged combustion in series connection
- F23C6/045—Combustion apparatus characterised by the combination of two or more combustion chambers or combustion zones, e.g. for staged combustion in series connection with staged combustion in a single enclosure
- F23C6/047—Combustion apparatus characterised by the combination of two or more combustion chambers or combustion zones, e.g. for staged combustion in series connection with staged combustion in a single enclosure with fuel supply in stages
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C9/00—Combustion apparatus characterised by arrangements for returning combustion products or flue gases to the combustion chamber
- F23C9/006—Combustion apparatus characterised by arrangements for returning combustion products or flue gases to the combustion chamber the recirculation taking place in the combustion chamber
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C2201/00—Staged combustion
- F23C2201/20—Burner staging
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C2201/00—Staged combustion
- F23C2201/30—Staged fuel supply
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C2202/00—Fluegas recirculation
- F23C2202/40—Inducing local whirls around flame
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
Abstract
METHOD FOR THE COMBUSTION OF FUEL BY STEPPED
FUEL FEED AND BURNER FOR USE WITH IT
ABSTRACT
To lower NOx production in a stepped fuel feed combustion method, secondary fuel (15) is injected into a combustion chamber as a set through an internal recirculation zone of the primary combustion zone (6) to a secondary combustion zone (8). The stoichiometry of the system up to and including the secondary combustion zone is preferably 0.70 to 0.90. A burner adapted for such a method is also disclosed, which has a duct for secondary fuel (15) concentrically within an inner annular duct (13) for primary fuel and an outer annular duct (14) for primary air.
[Fig. 3]
FUEL FEED AND BURNER FOR USE WITH IT
ABSTRACT
To lower NOx production in a stepped fuel feed combustion method, secondary fuel (15) is injected into a combustion chamber as a set through an internal recirculation zone of the primary combustion zone (6) to a secondary combustion zone (8). The stoichiometry of the system up to and including the secondary combustion zone is preferably 0.70 to 0.90. A burner adapted for such a method is also disclosed, which has a duct for secondary fuel (15) concentrically within an inner annular duct (13) for primary fuel and an outer annular duct (14) for primary air.
[Fig. 3]
Description
METHOD FOR THE COMBUSTION OF FUEL BY STEPPED :
FU~L FEED AND BURNER FOR USE WITH IT
Th~ invention relates to a method for the combustion of fuel with a low NO~ content in the combustion gases by means of stepped fuel feed.
Stepped fuel feed is a known type of operation which uses at least one burner of a type comprising a duct (hereinafter a quarl) widening out to a combustion chamber, near the throat of which two concPntric annular ducts open out, through the inner of which a first part of the fuel (hereinafter primary fuel) is fed, and through the outer of which swirling combustion air is fed. The primary fuel and the combustion air is allowed to combust in the combustion chamber in a primary combustion zone, whereby an internal recirculation zone (IRZ) is formed. A second part of the fuel (hereina~ter secondary fuel) ls fed to the combustion chamber near the primary combustion zone, and the secondary fuel is allowed to combust under substoichiometric conditions in a secondary combustion zone downstream from the primary combustion zone, whereby the N0~ formed in the primary combustion zone is reduced, at least in part.
Finally, tertiary combustion air is fed in near the secondary combustion zone, whersby the residual fuel is allowed to burn out in ths product of combustion formed in :: ~ . . ,. - ~ . . .
.
FU~L FEED AND BURNER FOR USE WITH IT
Th~ invention relates to a method for the combustion of fuel with a low NO~ content in the combustion gases by means of stepped fuel feed.
Stepped fuel feed is a known type of operation which uses at least one burner of a type comprising a duct (hereinafter a quarl) widening out to a combustion chamber, near the throat of which two concPntric annular ducts open out, through the inner of which a first part of the fuel (hereinafter primary fuel) is fed, and through the outer of which swirling combustion air is fed. The primary fuel and the combustion air is allowed to combust in the combustion chamber in a primary combustion zone, whereby an internal recirculation zone (IRZ) is formed. A second part of the fuel (hereina~ter secondary fuel) ls fed to the combustion chamber near the primary combustion zone, and the secondary fuel is allowed to combust under substoichiometric conditions in a secondary combustion zone downstream from the primary combustion zone, whereby the N0~ formed in the primary combustion zone is reduced, at least in part.
Finally, tertiary combustion air is fed in near the secondary combustion zone, whersby the residual fuel is allowed to burn out in ths product of combustion formed in :: ~ . . ,. - ~ . . .
.
the secondary combustion zone in a burn-out zone downstream from the secondary co~bustion zone. At the same time the invention relates to a burner to be used with the method.
This type of burner is known in current practice as a 'swirl stabilized burner'. A characteristic of such a burner is that during operation the internal recirculation zone is set up, in which the products of combustion of the primary combustion zone are recirculated.
K. Leikert, K. D. Rennert and W. Schreiber in "Test data of a multiple staged-mixing burner using fuel staging" published in the proceedings of the IFRF 8th Members Conference, Noordwijkerhout May 28-30, 1986 disclosed how the secondary fuel may be fed by means of a number of passages through the wall of the combustion chamber.
Leikert and Rennart, with G. Buttner, are named as inventors of GB-A-2146113, wherein there is disclosed the concentric introduction through annular ducts of, successively from the centre, primary fuel, primary air, secondary fuel and tertiary air. The central void inside the innermost annulus (i.e. inside the primary fuel duct) is in communication with a zone described as a return flow :
~; zone.
; R. Waibel and D. Nickeson in "Staged fuel burners for NO~ control" alæo published in the above mentioned proceedings, show how the secondary fuel may be fed into ~.... . .
:- :
.. . .
-J ~ 53 each burn0r and that feed be integrated into the burner design. ~owe~er, the fuel feed takes place outside the feed of the combustion air, the primary fuel being fed into the throat with the aid of a distribution head arranged as an annulus at the combustion chamber. Within the scope of the present application such an arrangement is deemed to be identical to fuel feed by means of the inner annulus.
In US-A-4265615 there is disclosed a can-type combustor divided by a restriction into a primary and secondary zone. In this burner construction primary fuel is injected from an annular duct with annular air inlets both radially inside and outside it. Secondary fuel is injected from a central duct, and is intended to pass through the primary zone to the secondary zone where it will be ignited by tertiary air fed into that zone. All the fuel flows and air flows through the burner are swirled and directed so as to maintain the primary and secondary fuels separate in the primary zone.
An inconvenience of the known methods and constructions is that the mixture of the secondary fuel and the products of combustion from the primary combustion zone is poor, whereby results are difficult to optimise.
The burner construction and method of the invention is differentiated from GB-A-2146113 ~which because of its constructional and operational slmilarities is rsgarded as the closest prior art) by the fact that the .. .: ,;: ,.. . . .
~\J ~ , ?J '~
~ IF 1 NL/OA5 secondary f~el is fed through at least one duct concentric with or al~ost concentric with the two annuli, through which duct the secondary fuel is in~ected into the combustion chamber. This has various advanta~es. There is no need for extra passages through ~he wall of the combustion chamber for feeding the secondary ~uel. The manner of feeding the secondary fuel makes for a particularly simple and compact design of the burner. Further the secondary fuel may be fed at a lower speed at a distance from the wall of the combustion chamber. This means that less high temperature corrosion occurs in the steel pipes in that wall. Also it ~
restricts deposition of thick slag on the wall of the - -; -combustion chamber more to its burner part than with the state of the art. , -The secondary fuel is inJected into the combustion chamber at such a speed that the fuel penetrates as a ~et through the internal recirculation zone to the downstream end of the internal recirculation zone, and there mixes with the products of combustion of the primary combustion zone. Preferably the secondary fuel is fed to the combustion chamber at a speed of at least 30 m/sec.
This furth~r optimises the method in accordance with the invention. The secondary fuel is then preferably between 10 and 30~ of the fuel and the stoichiometry in the secondary combustion zone is between 0.60 and 1.0, and more preferably between 0.70 and 0.90.
.
. .
. , .
.. . . : ~ - -:- .. . .
: : .. . :
..
:: . : , :: - : `
, :
3 ~3 ~
In another aspect the invention is also embodied $n a burner of a type comprising a quarl widening out to a combustion chamber and a pair of concentric annular ducts opening out near the throat of the guarl, the inner annulus being intended for feeding fuel, and the outer annulus being intended for feeding combustion air and being provided with means of setting the combustion air swirling. As stated above, in current practice such a burner is known as a 'swirl stabilized burner'. In accordance with the invention the burner is provided with at least one duct concentric with or almost concentric with the two annuli intended for feeding secondary fuel during operation. Further optimization of the method in accordance with the invention is achieved in that the duct concentric with the two annuli opens out within the burner at a position lying from near the throat of the quarl to the end of the quarl flush in operation with the inner wall of a combustion chamber.
Embodlments of the lnvention will be illustrated by reference to the drawings wherein:
Fig. 1 shows fuel staged burning for a prior art stove;
Fig. 2 shows a prior art burner;
Fig. 3 shows fuel staged burning embodying the invention;
Fig. 4 shows resul~s obtained from the invention.
Fig. 1 and Fig. 2 show fuel staged burning in :
, accordance with the prior art, a burner 2 in the wall 3 of the stove. Primary fuel 4 and combustion air 5 are fed and combusted in a primary combustion zone 6. This combustion gives off NO~.
At the same time a secondary fuel 7 is fed and, after mixing in tha products of combustion from the primary combustion zone, is combusted under substoichiometric conditioning in a secondary combustion æone reburn zone 8.
This reduces, at least partially, the NOx formed in the primary combustion zone. In principle this reduction takes place in accordan~e with the equation~
2 NO + CH - ---> N2 + CO + OH
The products of combustion from the secondary -combustion zone contain still combustible constituents. ~`
These are burned out in a burnout zone 10 by tertiary air 9.
The burner used with this known method is often a swlrl stabllized burner, whereby (see Fig. 2) two concentric annular duots (annuli) 13 and 14 for feeding the first part of the fuel (primary fuel) 4 and the combustion air 5 open out into the throat 12 of a quarl 11. The combustion air is fed by swirling (not shown). With this type of burner, an internal recirculation 16 takes place in the primary -~
combustion zone 6.
An embodiment of the invention is shown in Fig. 3.
25 Here the secondary fuel 7 is fed through a duct 15 ;
concentric with, or near.ly so, and within the ducts 13 and .,;,. : . . : ' ` ' ` ' : , , ' ` ' ::~ . . . .
;: , , . -: .
: . ~ : , : . ;~ .: ~. , : : . . : - - . . -.. . ..
~ ? ~
14. This fuel is fed at such a speed that a jet penetrates the internal recirculation zone 16 and mixes, particularly at its downstream end 17, with the products of combustion from the primary combustion zone, whereupon combustlon takes place in the secondary combustion zone 8. As indicated by a broken llne in Fig. 3, the duct 15 may open out into the burner at any position in a range bordered by the throat 12 and by the inner wall 18 of the combustion chamber.
The invention may be used for all kinds of fuel such as pulverized coal, oil, residues and gas.
The results of this operation in terms of N0~ ¦
content in the exhaust gases depend, among other things, on the type of fuel and the position of feeding the tertiary combustlon air. However, it has been found that the effect of the stoichiometry and the ~uantlty of secondary fuel, under otherwise identical conditions, is determlned by a parameter, namely the stoichiometry in the secondary combustion zone (by which is to be understood the stoichiometry of all fuel and air fed up to and including the secondary combustion zone).
Fig. 4 showq a characteristic of the invention established on this basis. The stoichiometry in the secondary combustion zone is preferably between 0.70 and 0.90. The quantity of secondary fuel used in preferably as small as possible, yet for practical reasons remains in the range 10 to 30%.
.,.- ' , : , .. : : ~:: :: , . ~
This type of burner is known in current practice as a 'swirl stabilized burner'. A characteristic of such a burner is that during operation the internal recirculation zone is set up, in which the products of combustion of the primary combustion zone are recirculated.
K. Leikert, K. D. Rennert and W. Schreiber in "Test data of a multiple staged-mixing burner using fuel staging" published in the proceedings of the IFRF 8th Members Conference, Noordwijkerhout May 28-30, 1986 disclosed how the secondary fuel may be fed by means of a number of passages through the wall of the combustion chamber.
Leikert and Rennart, with G. Buttner, are named as inventors of GB-A-2146113, wherein there is disclosed the concentric introduction through annular ducts of, successively from the centre, primary fuel, primary air, secondary fuel and tertiary air. The central void inside the innermost annulus (i.e. inside the primary fuel duct) is in communication with a zone described as a return flow :
~; zone.
; R. Waibel and D. Nickeson in "Staged fuel burners for NO~ control" alæo published in the above mentioned proceedings, show how the secondary fuel may be fed into ~.... . .
:- :
.. . .
-J ~ 53 each burn0r and that feed be integrated into the burner design. ~owe~er, the fuel feed takes place outside the feed of the combustion air, the primary fuel being fed into the throat with the aid of a distribution head arranged as an annulus at the combustion chamber. Within the scope of the present application such an arrangement is deemed to be identical to fuel feed by means of the inner annulus.
In US-A-4265615 there is disclosed a can-type combustor divided by a restriction into a primary and secondary zone. In this burner construction primary fuel is injected from an annular duct with annular air inlets both radially inside and outside it. Secondary fuel is injected from a central duct, and is intended to pass through the primary zone to the secondary zone where it will be ignited by tertiary air fed into that zone. All the fuel flows and air flows through the burner are swirled and directed so as to maintain the primary and secondary fuels separate in the primary zone.
An inconvenience of the known methods and constructions is that the mixture of the secondary fuel and the products of combustion from the primary combustion zone is poor, whereby results are difficult to optimise.
The burner construction and method of the invention is differentiated from GB-A-2146113 ~which because of its constructional and operational slmilarities is rsgarded as the closest prior art) by the fact that the .. .: ,;: ,.. . . .
~\J ~ , ?J '~
~ IF 1 NL/OA5 secondary f~el is fed through at least one duct concentric with or al~ost concentric with the two annuli, through which duct the secondary fuel is in~ected into the combustion chamber. This has various advanta~es. There is no need for extra passages through ~he wall of the combustion chamber for feeding the secondary ~uel. The manner of feeding the secondary fuel makes for a particularly simple and compact design of the burner. Further the secondary fuel may be fed at a lower speed at a distance from the wall of the combustion chamber. This means that less high temperature corrosion occurs in the steel pipes in that wall. Also it ~
restricts deposition of thick slag on the wall of the - -; -combustion chamber more to its burner part than with the state of the art. , -The secondary fuel is inJected into the combustion chamber at such a speed that the fuel penetrates as a ~et through the internal recirculation zone to the downstream end of the internal recirculation zone, and there mixes with the products of combustion of the primary combustion zone. Preferably the secondary fuel is fed to the combustion chamber at a speed of at least 30 m/sec.
This furth~r optimises the method in accordance with the invention. The secondary fuel is then preferably between 10 and 30~ of the fuel and the stoichiometry in the secondary combustion zone is between 0.60 and 1.0, and more preferably between 0.70 and 0.90.
.
. .
. , .
.. . . : ~ - -:- .. . .
: : .. . :
..
:: . : , :: - : `
, :
3 ~3 ~
In another aspect the invention is also embodied $n a burner of a type comprising a quarl widening out to a combustion chamber and a pair of concentric annular ducts opening out near the throat of the guarl, the inner annulus being intended for feeding fuel, and the outer annulus being intended for feeding combustion air and being provided with means of setting the combustion air swirling. As stated above, in current practice such a burner is known as a 'swirl stabilized burner'. In accordance with the invention the burner is provided with at least one duct concentric with or almost concentric with the two annuli intended for feeding secondary fuel during operation. Further optimization of the method in accordance with the invention is achieved in that the duct concentric with the two annuli opens out within the burner at a position lying from near the throat of the quarl to the end of the quarl flush in operation with the inner wall of a combustion chamber.
Embodlments of the lnvention will be illustrated by reference to the drawings wherein:
Fig. 1 shows fuel staged burning for a prior art stove;
Fig. 2 shows a prior art burner;
Fig. 3 shows fuel staged burning embodying the invention;
Fig. 4 shows resul~s obtained from the invention.
Fig. 1 and Fig. 2 show fuel staged burning in :
, accordance with the prior art, a burner 2 in the wall 3 of the stove. Primary fuel 4 and combustion air 5 are fed and combusted in a primary combustion zone 6. This combustion gives off NO~.
At the same time a secondary fuel 7 is fed and, after mixing in tha products of combustion from the primary combustion zone, is combusted under substoichiometric conditioning in a secondary combustion æone reburn zone 8.
This reduces, at least partially, the NOx formed in the primary combustion zone. In principle this reduction takes place in accordan~e with the equation~
2 NO + CH - ---> N2 + CO + OH
The products of combustion from the secondary -combustion zone contain still combustible constituents. ~`
These are burned out in a burnout zone 10 by tertiary air 9.
The burner used with this known method is often a swlrl stabllized burner, whereby (see Fig. 2) two concentric annular duots (annuli) 13 and 14 for feeding the first part of the fuel (primary fuel) 4 and the combustion air 5 open out into the throat 12 of a quarl 11. The combustion air is fed by swirling (not shown). With this type of burner, an internal recirculation 16 takes place in the primary -~
combustion zone 6.
An embodiment of the invention is shown in Fig. 3.
25 Here the secondary fuel 7 is fed through a duct 15 ;
concentric with, or near.ly so, and within the ducts 13 and .,;,. : . . : ' ` ' ` ' : , , ' ` ' ::~ . . . .
;: , , . -: .
: . ~ : , : . ;~ .: ~. , : : . . : - - . . -.. . ..
~ ? ~
14. This fuel is fed at such a speed that a jet penetrates the internal recirculation zone 16 and mixes, particularly at its downstream end 17, with the products of combustion from the primary combustion zone, whereupon combustlon takes place in the secondary combustion zone 8. As indicated by a broken llne in Fig. 3, the duct 15 may open out into the burner at any position in a range bordered by the throat 12 and by the inner wall 18 of the combustion chamber.
The invention may be used for all kinds of fuel such as pulverized coal, oil, residues and gas.
The results of this operation in terms of N0~ ¦
content in the exhaust gases depend, among other things, on the type of fuel and the position of feeding the tertiary combustlon air. However, it has been found that the effect of the stoichiometry and the ~uantlty of secondary fuel, under otherwise identical conditions, is determlned by a parameter, namely the stoichiometry in the secondary combustion zone (by which is to be understood the stoichiometry of all fuel and air fed up to and including the secondary combustion zone).
Fig. 4 showq a characteristic of the invention established on this basis. The stoichiometry in the secondary combustion zone is preferably between 0.70 and 0.90. The quantity of secondary fuel used in preferably as small as possible, yet for practical reasons remains in the range 10 to 30%.
.,.- ' , : , .. : : ~:: :: , . ~
Claims (8)
1. A method for stepped fuel feed combustion in a combustion chamber for reduced NOx content including feeding primary fuel (4) and air (5) into the chamber from respectively inner (13) and outer (14) concentric annular ducts of a burner to combust in the chamber in a primary combustion zone (6), secondary fuel (15) being added to complete combustion of combustion products from the primary zone (6) with further air in the same chamber under substoichiometric conditions in a secondary combustion zone (8) characterised in that the primary fuel (4) and air (5) are fed through a divergent throat (12) of a quarl (11) and in that the secondary fuel is fed to the chamber from a duct (7) within the inner (4) of the annular ducts (4,5) to penetrate as a jet through the primary combustion zone (6) to the secondary combustion zone (8).
2. Method according to Claim 1, wherein the secondary fuel is fed to the combustion chamber at a speed of at least 30 m/sec.
3. Method according to Claim 1 or Claim 2, wherein the secondary fuel is between 10 and 30% of the total fuel.
4. Method according to any one of Claims 1 to 3, wherein the stoichiometry in the secondary combustion zone is between 0.6 and 1Ø
5. Method according to Claim 4 wherein the stoichiometry is between 0.7 and 0.9.
6. A stepped fuel feed combustion method using at least one burner comprising a quarl opening out to a combustion chamber near the throat of which quarl two concentric annular ducts open out, comprising feeding primary fuel through the inner of said concentric annular ducts and feeding primary air through the outer of said concentric annular ducts while imposing a swirl upon said air, combusting said primary fuel and primary air in said combustion chamber in a primary combustion zone in which an internal recirculation zone is formed, and injecting secondary fuel into the combustion chamber from a duct radially inside of said inner concentric annular duct such as to penetrate through said internal recirculation zone as a jet and to combust with products of combustion from the primary combustion zone under substoichiometric conditions in a secondary combustion zone downstream of said primary zone, and burning out any residual fuel of the primary and secondary fuel by feeding further air.
7. Burner for use with the method in accordance with andy one of Claims 1 to 6 comprising a quarl (11) widening out (12) to a combustion chamber and a pair of concentric annular ducts (13,14) opening out near the throat of the quarl (11), the inner (13) being intended for feeding fuel, and the outer (14) being intended for feeding primary combustion air and being provided with means of setting the combustion air swirling, the burner being provided with at least one duct (15) within and concentric with or almost concentric with the two annuli and intended for feeding secondary fuel during operation.
8. Burner according to Claim 7, wherein the innermost duct (15) opens out within the burner in a position which lies between the throat (12) of the widening duct (11) to the end of the widening duct flush durlng operation with the inner wall (18) of the combustion chamber.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL8902963 | 1989-12-01 | ||
| NL8902963A NL8902963A (en) | 1989-12-01 | 1989-12-01 | PROCESS FOR BURNING FUEL OF LOW NOX CONTENT IN THE COMBUSTION GASES USING THROUGH STAGE FUEL SUPPLY AND BURNER. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2031228A1 true CA2031228A1 (en) | 1991-06-02 |
Family
ID=19855728
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2031228 Abandoned CA2031228A1 (en) | 1989-12-01 | 1990-11-30 | Method for the codmbustion of fuel by stepped fuel feed and burner for use with it |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0430376A3 (en) |
| JP (1) | JPH03213901A (en) |
| CA (1) | CA2031228A1 (en) |
| NL (1) | NL8902963A (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0919768B1 (en) * | 1997-11-25 | 2003-02-05 | Alstom | Burner for the operation of a heat generator |
| DE19853162C2 (en) * | 1998-11-18 | 2003-04-30 | Steag Encotec Gmbh | Process for burning a nitrogenous fuel |
| FR2790309B1 (en) * | 1999-02-25 | 2001-05-11 | Stein Heurtey | IMPROVEMENTS IN OR RELATING TO FLAT BURNERS |
| FR2795808B1 (en) * | 1999-07-02 | 2001-09-14 | Air Liquide | COMBUSTION PROCESS APPLICABLE TO THE MANUFACTURE OF CEMENT |
| CA2328627A1 (en) * | 1999-12-16 | 2001-06-16 | Harry P. Finke | Air and fuel staged burner |
| KR101178195B1 (en) * | 2003-09-05 | 2012-08-30 | 지멘스 악티엔게젤샤프트 | Device for stabilizing combustion in gas turbine engines |
| FR2889579B1 (en) * | 2005-08-03 | 2007-09-14 | Air Liquide | METHOD FOR CALCINING A MATERIAL WITH LOW NOX EMISSION |
| ITMI20060155A1 (en) * | 2006-01-31 | 2007-08-01 | Techint Spa | FLAME BURNER WITH FLAT LOW EMISSIONS POLLUTANT |
| PL2930227T3 (en) | 2014-04-07 | 2017-09-29 | Subcoal International B.V. | Method for firing an industrial furnace using coal or cokes with a secondary fuel |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5914142Y2 (en) * | 1978-08-08 | 1984-04-25 | 久夫 佐藤 | Hanging tool driver |
| US4265615A (en) * | 1978-12-11 | 1981-05-05 | United Technologies Corporation | Fuel injection system for low emission burners |
| US4265085A (en) * | 1979-05-30 | 1981-05-05 | United Technologies Corporation | Radially staged low emission can-annular combustor |
| JPS6027888B2 (en) * | 1980-10-27 | 1985-07-02 | 川崎重工業株式会社 | Low NOx combustion method for combustion chamber |
| EP0076036B1 (en) * | 1981-09-28 | 1987-04-29 | John Zink Company | Method and apparatus for burning fuel in stages |
| DE3206074A1 (en) * | 1982-02-17 | 1983-08-18 | Körting Hannover AG, 3000 Hannover | BURNERS FOR DUST-MADE, GASEOUS AND / OR LIQUID FUELS |
| DE3331989A1 (en) * | 1983-09-05 | 1985-04-04 | L. & C. Steinmüller GmbH, 5270 Gummersbach | METHOD FOR REDUCING NO (DOWN ARROW) X (DOWN ARROW) EMISSIONS FROM THE COMBUSTION OF NITROGENOUS FUELS |
| DE3446788A1 (en) * | 1984-12-21 | 1986-07-03 | L. & C. Steinmüller GmbH, 5270 Gummersbach | Flame vaporising-burner with precombustion chamber |
| FR2625295B1 (en) * | 1987-12-24 | 1990-04-13 | Gaz De France | METHOD AND APPARATUS FOR PROVIDING THE STAGE COMBUSTION OF A FUEL-FUEL MIXTURE REDUCING THE PRODUCTION OF NITROGEN OXIDES |
| JPH0656245B2 (en) * | 1988-02-09 | 1994-07-27 | バブコツク日立株式会社 | Combustion control method for pulverized coal combustion device |
-
1989
- 1989-12-01 NL NL8902963A patent/NL8902963A/en not_active Application Discontinuation
-
1990
- 1990-11-27 EP EP19900203134 patent/EP0430376A3/en not_active Withdrawn
- 1990-11-30 JP JP33684190A patent/JPH03213901A/en active Pending
- 1990-11-30 CA CA 2031228 patent/CA2031228A1/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03213901A (en) | 1991-09-19 |
| EP0430376A2 (en) | 1991-06-05 |
| EP0430376A3 (en) | 1992-01-15 |
| NL8902963A (en) | 1991-07-01 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| FZDE | Dead |