DE1084419B - Process for operating pulverized coal burners and equipment for practicing the process - Google Patents
Process for operating pulverized coal burners and equipment for practicing the processInfo
- Publication number
- DE1084419B DE1084419B DEK15762A DEK0015762A DE1084419B DE 1084419 B DE1084419 B DE 1084419B DE K15762 A DEK15762 A DE K15762A DE K0015762 A DEK0015762 A DE K0015762A DE 1084419 B DE1084419 B DE 1084419B
- Authority
- DE
- Germany
- Prior art keywords
- secondary air
- air
- pulverized coal
- nozzles
- partial
- 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.)
- Pending
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D1/00—Burners for combustion of pulverulent fuel
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
Description
Verfahren zum Betrieb von Kohlenstaubbrennern und Einrichtung zur Ausübung des Verfahrens Die Erfindung betrifft ein Verfahren zum Betrieb von Kohlenstaubbrennern, insbesondere Kohlenstaub-Eckenbrennern, mit quer zur Hauptströmungsrichtung der Flamme gerichteten und abwechselnd übereinander angeordneten Zuführungsdüsen für das Kohlenstaub-Erstluft-Gemisch und die Zweitluft, bei denen die Zweitluft mit erheblich höherer Geschwindigkeit in die Brennkammer eingeblasen wird als das Kohlenstaub-Erstluft-Gemisch.Process for the operation of pulverized coal burners and device for Execution of the method The invention relates to a method for operating pulverized coal burners, in particular coal dust corner burners, with transverse to the main flow direction of the Flame-directed and alternating supply nozzles for the coal dust / first air mixture and the second air, in which the second air with is blown into the combustion chamber at a much higher speed than the coal dust / first air mixture.
Für die schnelle und einwandfreie Verbrennung von Kohlenstaub in Brennkammern von Strahlungsdampferzeugern od. dgl. ist es Voraussetzung, daß die um die Staubteilchen sich bildende Inertgashülle ständig entfernt und frischer Sauerstoff an den Brennstaub herangeführt wird. Diese Voraussetzung wird üblicherweise dadurch geschaffen, daß die Zweitluft mit höherer Geschwindigkeit in dieBrennkammer ein-,geblasen wird als der Kohlenstaub, wodurch sich eine erhebliche Relativgeschwindigkeit zwischen Luft und Staub einstellt. Die bekannten Feuerungen haben indessen den Nachteil, daß die mit hoher Geschwindigkeit in die Brennkammer ausströmende Zweitluft den Kohlenstaub unmittelbar hinter der Brennermündung erfaßt, wobei die Gefahr besteht, daß die Flamme abreißt.That the dust particles forming inert gas envelope is brought constantly removed and f-driven oxygen to the combustible dust od for quick and proper combustion of pulverized coal in the combustion chambers of steam generators radiation. The like. It is a prerequisite. This requirement is usually created in that the secondary air is blown into the combustion chamber at a higher speed than the coal dust, which results in a considerable relative speed between air and dust. The known furnaces, however, have the disadvantage that the secondary air flowing out at high speed into the combustion chamber catches the coal dust immediately behind the burner mouth, with the risk that the flame will break off.
Der vorerwähnte Nachteil wird erfindungsgemäß beseitigt, indem zwischen den Zuführungsdüsen für das Kohlenstaub-Erstlaft-Gemisch und die Zweitluft ein Teilstrom der Zweitluft mit einer Geschwindigkeit eingeblasen wird, die niedriger ist als die des Hauptstromes der Zweitluft. Auf diese Weise wird zwischen den Brennstoff- und den Zweitluftstrom durch die austretenden Teilluftströme ein Luftpolster geringerer Geschwindigkeit gelegt, dadurch die sichere Zündung des Brennstoffes unmittelbar hinter der Brennstoffdüse ermöglicht und dennoch sichergestellt, daß der Hauptstrom der Zweitluft mit hoher Geschwindigkeit in das eigentliche Flammenzentrum eindringt und dieses ausreichend mit Luft versorgt.The aforementioned disadvantage is eliminated according to the invention by between the feed nozzles for the coal dust / first air mixture and the secondary air a partial flow the secondary air is blown in at a speed lower than that of the main flow of the secondary air. In this way, between the fuel and the secondary air flow through the exiting partial air flows one air cushion less Speed, thereby the safe ignition of the fuel immediately allows behind the fuel nozzle and yet ensures that the main flow the secondary air penetrates the actual flame center at high speed and this is adequately supplied with air.
Weitere Einzelheiten der Erfindung gehen aus der Zeichnung und der sie betreffenden Beschreibung hervor.Further details of the invention go from the drawing and the description concerning them.
Die Abbildung zeigt einen senkrechten Schnitt durch eine gemäß der Erfindung ausgebildete Brennerecke. Im Brenncrkasten 1 sind die Brennstoffdüsen 2 und die Zweitluftdüsen angeordnet. Letztere sind durch Trennwände 7 in mehrere Düsen 3, 4 unterteilt, von denen die Düsen 4 der Zuführung der Teilluftströme dienen. An den Anströmenden der Zwischenwände 7 sind um Achsen 5 schwenkbare Regelklappen 6 angeordnet, mit deren Hilfe eine Veränderung der durch die Düsen 4 strömenden Teilluftmenge möglich ist.The figure shows a vertical section through a burner corner designed according to the invention. In the burner box 1 , the fuel nozzles 2 and the secondary air nozzles are arranged. The latter are divided by partitions 7 into several nozzles 3, 4, of which the nozzles 4 are used to supply the partial air flows. To the inflowing of the partition walls 7 5 swiveling control flap 6 are arranged around axes, by means of which a change of the air flowing through the nozzles 4 Part amount of air is possible.
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEK15762A DE1084419B (en) | 1952-10-10 | 1952-10-10 | Process for operating pulverized coal burners and equipment for practicing the process |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEK15762A DE1084419B (en) | 1952-10-10 | 1952-10-10 | Process for operating pulverized coal burners and equipment for practicing the process |
Publications (1)
Publication Number | Publication Date |
---|---|
DE1084419B true DE1084419B (en) | 1960-06-30 |
Family
ID=7214683
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEK15762A Pending DE1084419B (en) | 1952-10-10 | 1952-10-10 | Process for operating pulverized coal burners and equipment for practicing the process |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE1084419B (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2480906A1 (en) * | 1980-04-22 | 1981-10-23 | Mitsubishi Heavy Ind Ltd | APPARATUS FOR BURNING PULVERIZED FUEL |
US5193995A (en) * | 1987-12-21 | 1993-03-16 | Asea Brown Boveri Ltd. | Apparatus for premixing-type combustion of liquid fuel |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE427871C (en) * | 1922-04-26 | 1926-04-24 | Int Comb Eng Corp | Method and device for the combustion of dust-like fuels |
-
1952
- 1952-10-10 DE DEK15762A patent/DE1084419B/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE427871C (en) * | 1922-04-26 | 1926-04-24 | Int Comb Eng Corp | Method and device for the combustion of dust-like fuels |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2480906A1 (en) * | 1980-04-22 | 1981-10-23 | Mitsubishi Heavy Ind Ltd | APPARATUS FOR BURNING PULVERIZED FUEL |
US5193995A (en) * | 1987-12-21 | 1993-03-16 | Asea Brown Boveri Ltd. | Apparatus for premixing-type combustion of liquid fuel |
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