EP0653589B1 - Brennkammer mit Abgasrückführung - Google Patents
Brennkammer mit Abgasrückführung Download PDFInfo
- Publication number
- EP0653589B1 EP0653589B1 EP19940890166 EP94890166A EP0653589B1 EP 0653589 B1 EP0653589 B1 EP 0653589B1 EP 19940890166 EP19940890166 EP 19940890166 EP 94890166 A EP94890166 A EP 94890166A EP 0653589 B1 EP0653589 B1 EP 0653589B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pipe
- combustion chamber
- opening
- wall
- combustion
- 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.)
- Expired - Lifetime
Links
- 238000002485 combustion reaction Methods 0.000 title claims description 29
- 239000007789 gas Substances 0.000 claims description 16
- 230000005855 radiation Effects 0.000 claims description 5
- 239000002817 coal dust Substances 0.000 claims description 2
- 230000007704 transition Effects 0.000 claims description 2
- 239000002912 waste gas Substances 0.000 claims 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 238000010276 construction Methods 0.000 description 4
- 239000010881 fly ash Substances 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K1/00—Preparation of lump or pulverulent fuel in readiness for delivery to combustion apparatus
- F23K1/04—Heating fuel prior to delivery to combustion apparatus
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B37/00—Component parts or details of steam boilers
- F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
- F22B37/10—Water tubes; Accessories therefor
- F22B37/14—Supply mains, e.g. rising mains, down-comers, in connection with water tubes
- F22B37/147—Tube arrangements for cooling orifices, doors and burners
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K2900/00—Special features of, or arrangements for fuel supplies
- F23K2900/01041—Heating by using exhaust gas heat
Definitions
- the invention relates to a combustion chamber for a preferably with powdered coal dust fired steam generator according to the forced or natural circulation system.
- a welded one Pipe wall consisting of essentially vertical pipes, and a device for exhaust gas recirculation with at least one combustion chamber opening provided in the pipe wall and a return pipe for the exhaust gas.
- the return of the hot flue gas from the lower part of the combustion chamber (DE 31 13 776) known for mill drying. Be hit for cooling the exhaust pipe separate heating surface pipes, which are at a distance from the combustion chamber wall are arranged, used.
- DE-C-969 609 in the upper part Combustion chamber the combustion chamber pipes into the back suction opening on the combustion chamber wall is mostly designed as a gas-tight membrane wall, bent into the return shaft to cool it in the entrance area. Finally, this is bricked up with a Back suction head connected. in which the cold gas / primary air injection arranged and that Return pipe is connected.
- the invention has set itself the task. to face the known difficulties.
- the device according to the invention has cooled ones in the region of the combustion chamber opening Pipe wall parts and no bricked-up components on which fly ash components, can easily deposit, especially in the doughy state, and thereby form slags. This is particularly important because the openings are in the area of the combustion chamber radiation, so that the lining has practically combustion chamber temperature.
- Formation of the back suction head as part of the cooled pipe wall can result in dough fly ash particles not so easy to apply here and therefore less slagging.
- the construction according to the invention horizontal wall parts and thus fly ash Avoids deposits.
- the square combustion chamber opening enables the use of flat wall parts for the back suction head. which are welded out in a simple manner Tubes with webs are manufactured.
- the inclined arrangement of the bent out Combustion chamber-forming tubes always point in the increasing direction, so do not form water bags that are the natural circulation or forced circulation of the flowing in the pipes Make water difficult and enable trouble-free operation.
- the connected bricked-up components are no longer in the direct radiation area of the combustion chamber and are therefore no longer exposed to the risk of slagging.
- the pipe part of the suction head can be cleaned with a water blower without risk of damage will.
- Through recesses in the webs between the tubes of the return head the supply of cold gases and primary air take place via an annular channel without increasing the pressure loss Nozzles become necessary, which creates a cooling veil to prevent Caking along the walls of the return duct or the return pipe forms.
- This construction allows the inclusion of the primary air supply and / or Cold gas in the combustion chamber wall construction.
- FIGS. 1 and 2 wherein Fig. 1 is an overview and Fig. 2 is an axiometric representation of the suction head with the Combustion chamber wall shows.
- FIG. 1 shows a steam generator with hot gas recirculation 11 from the combustion chamber 1, in which the recirculated hot gas in a mill 12 the fuel (coal 13) during its Grinding dries and finally together with the primary air 6 and / or cold gas Burner 15 is supplied.
- the hot gas return 11 closes a cooled, the pipe wall circulation connected combustion chamber neck 16, in which the tube wall 3 of the Steam generator, for example, has a diamond-shaped opening 2 and the tube wall parts be bent outwards on the sides of the opening 2 and one opposite the pipe wall have spread pipe division.
- Tube wall parts 4 and 4 form a closed one Combustion chamber neck 16 with flat wall parts that have a downward opening 5, on which a bricked outside of the combustion chamber radiation Transition piece 7 to the round return pipe 9 (return shaft) is connected, which leads to the mill 12 and from there to the burner 15.
- an axial expansion joint 8 is provided with corrugated expansion joints 14 is designed.
- Primary air 6 can be used as sealing gas in this dehufuge 8 or cold exhaust gas can be supplied.
- the webs between the tubes in this area can be omitted, creating an air curtain along the connected Pipe wall forms, which largely prevents the settling of solid particles.
- the neck 16 of the tube wall 3 has a gusset shape Pipe wall parts 10 and 10 ', which delimit the lower part of the opening 2.
- the pipe guides in the individual wall parts 4 and 4 'and in the gussets 10 and 10' are through dash-dotted lines indicated.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Combustion Of Fluid Fuel (AREA)
Description
Claims (5)
- Brennkammer (1) für einen vorzugsweise mit mahlgetrocknetem Kohlenstaub befeuerten Dampferzeuger nach dem Zwangs- oder Naturumlaufsystem mit einer geschweißten Rohrwand (3) aus im wesentlichen vertikal verlaufenden Rohren, und einer Vorrichtung (11) zur Abgasrückführung mit mindestens einer in der Rohrwand vorgesehenen Brennkammeröffnung (2) und einem Rückführungsrohr (9) für das Abgas, dadurch gekennzeichnet, daß die Brennkammeröffnung (2) in Form eines auf einer Ecke stehenden Viereckes ausgebildet ist und eine Brennkammeraushalsung (16) aufweist, die von ebenen Rohrwandteilen (4. 4') begrenzt ist, welche aus unter Spreizung der Teilung nach außen gebogenen und unter Bildung einer nach abwärts gerichteten Öffnung (5) wieder in die Rohrwand (3) zurückgeführten Rohren gebildet sind, daß im Bereich der Rohrwandteile (4, 4'), in Strömungsrichtung des Abgases vor der Öffnung (5), eine Zuführung (6) für Primärluft und/oder Kaltgas vorgesehen ist und daß anschließend an die Öffnung (5) und außerhalb des direkten Strahlungsbereiches der Brennkammer (1) ein ausgemauertes Übergangsstück (7) vorgesehen ist, an dem über eine Dehnfuge (8) das Rückführungsrohr (9) für das Abgas angeschlossen ist.
- Brennkammer nach Anspruch 1, dadurch gekennzeichnet, daß bei der Zuführung (6) der Primärluft und/oder des Kaltgases zur Bildung von Öffnungen in der Rohrwand die die Rohre verbindenden Stege zumindest zum Teil enffernt sind.
- Brennkammer nach Anspruch 1, dadurch gekennzeichnet, daß im Bereich der Rohrwandteile (4.4') zwischen den Rohren zwickelförmige Stege angeordnet sind.
- Brennkammer nach Anspruch 1, dadurch gekennzeichnet, daß das Übergangssstück (7) als Übergang von einem viereckigen zu einem runden Querschnitt ausgebildet ist und eine in Achsenrichtung wirkende Dehnfuge (8) zum Anschluß des Rückführungsrohres (9) aufweist.
- Brennkammmer nach Anspruch 1, dadurch gekennzeichnet, daß zwischen den die Öffnung (5) begrenzenden unteren Wandteilen (4') und der Rohrwand (3) zwickelförmige Rohrwandteile (10. 10') angeordnet sind. die den unteren Teil der Öffnung (2) der Rohrwand bestimmen.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT2054/93 | 1993-10-13 | ||
| AT205493A AT402439B (de) | 1993-10-13 | 1993-10-13 | Vorrichtung zur abgasrückführung an einer brennkammer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0653589A1 EP0653589A1 (de) | 1995-05-17 |
| EP0653589B1 true EP0653589B1 (de) | 1998-01-07 |
Family
ID=3526791
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19940890166 Expired - Lifetime EP0653589B1 (de) | 1993-10-13 | 1994-10-11 | Brennkammer mit Abgasrückführung |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0653589B1 (de) |
| AT (1) | AT402439B (de) |
| DE (1) | DE59404941D1 (de) |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE969609C (de) * | 1952-01-27 | 1958-06-26 | Babcock & Wilcox Dampfkessel W | Vortrockenschacht fuer Mahltrocknungsanlagen |
| DE1000956B (de) * | 1953-09-21 | 1957-01-17 | Kohlenscheidungs Ges Mit Besch | Anordnung zur Entnahme von Feuergasen aus einer mit Rohren ausgekleideten Brennkammer |
| DE1231716B (de) * | 1962-11-17 | 1967-01-05 | Walther & Cie Ag | Kuehlrohranordnung fuer eine Wandoeffnung von Dampferzeugern |
| DE1526182A1 (de) * | 1966-08-25 | 1970-03-05 | Babcock & Wilcox Ag | Feuergasabsaugekopf fuer Mahltrocknungsanlagen |
| TR21288A (tr) * | 1981-04-04 | 1984-03-22 | Babcock Ag | Bir yakitin yakilmasina mahsus usul ve tertibat |
| DE3400809A1 (de) * | 1984-01-12 | 1985-07-18 | Deutsche Babcock Werke AG, 4200 Oberhausen | Brennkammer |
| US5101773A (en) * | 1991-06-03 | 1992-04-07 | Foster Wheeler Energy Corporation | Heat exchanger feed system and method |
| CA2089424A1 (en) * | 1992-03-02 | 1993-09-03 | Michael Garkawe | Expansion seal assembly |
-
1993
- 1993-10-13 AT AT205493A patent/AT402439B/de not_active IP Right Cessation
-
1994
- 1994-10-11 EP EP19940890166 patent/EP0653589B1/de not_active Expired - Lifetime
- 1994-10-11 DE DE59404941T patent/DE59404941D1/de not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| EP0653589A1 (de) | 1995-05-17 |
| ATA205493A (de) | 1996-09-15 |
| AT402439B (de) | 1997-05-26 |
| DE59404941D1 (de) | 1998-02-12 |
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