DE469370C - Process for the operation of pulverized coal combustion for steam boilers with subsequent steam superheater - Google Patents

Process for the operation of pulverized coal combustion for steam boilers with subsequent steam superheater

Info

Publication number
DE469370C
DE469370C DEA44928D DEA0044928D DE469370C DE 469370 C DE469370 C DE 469370C DE A44928 D DEA44928 D DE A44928D DE A0044928 D DEA0044928 D DE A0044928D DE 469370 C DE469370 C DE 469370C
Authority
DE
Germany
Prior art keywords
superheater
pulverized coal
steam
coal combustion
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
Application number
DEA44928D
Other languages
German (de)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
AEG AG
Original Assignee
AEG AG
Publication date
Priority to DEA44928D priority Critical patent/DE469370C/en
Application granted granted Critical
Publication of DE469370C publication Critical patent/DE469370C/en
Expired legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23CMETHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C99/00Subject-matter not provided for in other groups of this subclass
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23CMETHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C2700/00Special arrangements for combustion apparatus using fluent fuel
    • F23C2700/06Combustion apparatus using pulverized fuel
    • F23C2700/066Other special arrangements

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)

Description

Verfahren zum Betriebe von Kohlenstaubfeuerungen für Dampfkessel mit anschließendem Dampfüberhitzer Bei Kohlenstaubfeuerungen wird mit nur geringem Luftüberschuß gearbeitet, daher ist die entstehende Rauchgasmenge geringer als bei Rostfeuerungen. Die Möglichkeit, die Feuerung mit derartig geringem Luftüberschuß zu betreiben, ist an sich einer der Hauptvorteile der Kohlenstaubfeuerung, doch bringt die wegen des geringen Luftüberschusses kleinere Rauchgasmenge auch Nachteile mit sich. Ein solcher Nachteil ist das Sinken der Überhitzertemperatur.Process for the operation of pulverized coal combustion for steam boilers with subsequent steam superheater In the case of pulverized coal combustion, only a small excess of air is used worked, so the amount of flue gas produced is less than with grate firing. The possibility of operating the furnace with such a small excess of air, is in itself one of the main advantages of pulverized coal combustion, but it brings with it the small excess of air, the smaller amount of smoke gas also has disadvantages. A such disadvantage is the drop in superheater temperature.

Der Erfindung gemäß werden nun diese Nachteile dadurch beseitigt, daß die Abgase eines beliebigen anderweitigen Ofens in die Kohlenstaubfeuerungsanlage derart eingeführt werden, daß in der letzteren keine Temperatursenkungen eintreten. Infolgedessen dürfen Abgase, bei welchen keine Nachverbrennung stattfindet, nicht in den Verbrennungsraum selbst eintreten, sondern müssen oberhalb des Feuerraumes zugeführt werden, wo die Verbrennungsgase der Kohlenstaubfeuerung in den ersten Zug eintreten.According to the invention, these disadvantages are now eliminated by that the exhaust gases from any other furnace in the pulverized coal furnace are introduced in such a way that no temperature drops occur in the latter. As a result, exhaust gases in which no afterburning takes place must not enter the combustion chamber itself, but must be above the combustion chamber are fed where the combustion gases of the pulverized coal combustion in the first Enter train.

Es ist bereits bekannt, beim Betriebe von Feuerungsanlagen Abgase zu verwenden; diese werden aber bei den bekannten Ausführungen nicht oberhalb des Feuerraumes eingeleitet, sondern in den Feuerraum selbst. Sie werden den Heizgasen also beigemischt, bevor die Verbrennung beendet ist. In dieser Stufe ist aber die Temperatur der Heizgase noch höher als die Temperatur von Abgasen, so daß die Heizgase abgekühlt werden. Auch sind Ausführungen bekannt, bei welchen Abgase schon dem einströmenden Brennstoff beigemischt werden. Auch hier ergibt sich eine Temperaturerniedrigung für die Gesamtheit der zum Überhitzer abströmenden Gase. Für den vorliegenden Zweck, eine höhere Überhitzertemperatur zu erzielen, als es bei unvermischten Gasen der Fall ist, sind diese bekannten Ausführungen also nicht geeignet. Dieser Zweck wird vielmehr erst dadurch verwirklicht, daß gemäß der Erfindung die zuzusetzenden Abgase den Verbrennungsgasen oberhalb des. Feuerraumes zugesetzt werden.It is already known to produce exhaust gases when operating combustion systems to use; However, these are not in the known versions above the Firebox initiated, but in the firebox itself. They are the heating gases so mixed in before the combustion has ended. At this stage, however, is the Temperature of the heating gases even higher than the temperature of exhaust gases, so that the heating gases be cooled down. Designs are also known in which exhaust gases are already flowing in Fuel can be added. Here, too, there is a decrease in temperature for all of the gases flowing off to the superheater. For the present purpose, to achieve a higher superheater temperature than with unmixed gases If so, these known designs are not suitable. This purpose will rather, only realized by the fact that, according to the invention, the exhaust gases to be added The combustion gases are added above the combustion chamber.

In der beiliegenden Zeichnung ist ein Ausführungsbeispiel der Erfindung dargestellt. Mit e ist ein Feuerraum bezeichnet, in welchen das Brennstaubluftgemisch bei a eintritt und dann in bekannter Weise verbrennt= Mittels eines Kanals c werden die Abgase beliebiger Öfen zugeführt. Der Eintritt dieser Abgase erfolgt bei b, wobei sich dieselben mit den aus dem Feuerraum e abziehenden Verbrennungsgasen vermischen.In the accompanying drawing is an embodiment of the invention shown. A combustion chamber is designated with e, in which the pulverized fuel air mixture occurs at a and then burns in a known manner = by means of a channel c the exhaust gases from any furnace are supplied. These exhaust gases enter at b, they mix with the combustion gases withdrawn from the combustion chamber e.

Hierdurch wird dem Überhitzer die nötige Wärmemenge zugeführt und so das Sinken der Überhitzertemperatur vermieden.As a result, the required amount of heat is supplied to the superheater and thus avoiding the drop in superheater temperature.

Claims (1)

PATENTANSPRUCH: Verfahren zum Betriebe von Kohlenstaubfeuerungen für Dampfkessel mit anschließendem Dampfüberhitzer, dadurch gekennzeichnet, daß zwecks Erhöhung der Überhitzertemperatur den aus dem Feuerraum abziehenden Heizgasen Abgase aus anderen Feuerungen in solcher Menge zugesetzt werden, daß im Überhitzer die erforderliche Temperatur aufrechterhalten werden kann. PATENT CLAIM: Process for operating pulverized coal firing systems for steam boilers with a subsequent steam superheater, characterized in that, in order to increase the superheater temperature, exhaust gases from other firing systems are added to the heating gases withdrawn from the furnace in such an amount that the required temperature can be maintained in the superheater.
DEA44928D Process for the operation of pulverized coal combustion for steam boilers with subsequent steam superheater Expired DE469370C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEA44928D DE469370C (en) Process for the operation of pulverized coal combustion for steam boilers with subsequent steam superheater

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEA44928D DE469370C (en) Process for the operation of pulverized coal combustion for steam boilers with subsequent steam superheater

Publications (1)

Publication Number Publication Date
DE469370C true DE469370C (en) 1928-12-10

Family

ID=6934454

Family Applications (1)

Application Number Title Priority Date Filing Date
DEA44928D Expired DE469370C (en) Process for the operation of pulverized coal combustion for steam boilers with subsequent steam superheater

Country Status (1)

Country Link
DE (1) DE469370C (en)

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