DE916784C - Device for avoiding the escape of coal dust from coal mills operated with excess pressure and a method for operating a coal dust furnace with the same - Google Patents
Device for avoiding the escape of coal dust from coal mills operated with excess pressure and a method for operating a coal dust furnace with the sameInfo
- Publication number
- DE916784C DE916784C DEST3116A DEST003116A DE916784C DE 916784 C DE916784 C DE 916784C DE ST3116 A DEST3116 A DE ST3116A DE ST003116 A DEST003116 A DE ST003116A DE 916784 C DE916784 C DE 916784C
- Authority
- DE
- Germany
- Prior art keywords
- coal
- coal dust
- mill
- operating
- furnace
- 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
Links
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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K2201/00—Pretreatment of solid fuel
- F23K2201/10—Pulverizing
- F23K2201/1006—Mills adapted for use with furnaces
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Crushing And Grinding (AREA)
- Air Supply (AREA)
Description
Die Erfindung betrifft eine Einrichtung zur Vermeidung des Kohlenstaubaustrittes aus mit Überdruck betriebenen Kohlenmühlen und ein Verfahren zum Betreiben einer Kohlenstaubfeuerung mit dieser Einrichtung.The invention relates to a device for preventing the escape of coal dust from coal mills operated with positive pressure and a method for operating a Coal dust firing with this facility.
Es ist bekannt, Kohlenmühlen sowohl mit Unterals auch mit Überdruck zu betreiben. Bei den Kohlenmühlen mit Überdruck besteht der besondere Nachteil, daß durch geringe Undichtigkeiten der lIühle Kohlenstaub austritt und dieser eine Verschmutzung der Umgebung sowie einen erhöhten Verschleiß bewirkt. 1lan hat darum in erster Linie versucht, die umlaufenden Wellen durch Spritzringe mit Wasserzu- und -abfluß oder Dichtungsringe mit Stahlband abzudichten. Auch wurden von Druckluft beaufschlagte Dichtungsbüchsen an dem Lager der Schlägermühlenwelle befestigt und der Spalt zwischen Dichtungsbüchse und Mühlengehäuse durch Dichtungsmaterial abgedichtet. Ferner sollten im Mühlengehäuse angebrachte Kanäle den auftretenden Überdruck abführen.It is known to have both under and overpressure coal mills to operate. The particular disadvantage of coal mills with overpressure is that the cool coal dust escapes through minor leaks and this one Pollution of the environment as well as increased wear causes. 1lan has therefore primarily tries to break the rotating waves by using splash rings with water and drain or sealing rings with steel tape. Also were made of compressed air acted on sealing sleeves attached to the bearing of the beater mill shaft and the gap between the sealing sleeve and the mill housing is sealed by sealing material. Furthermore, channels installed in the mill housing should dissipate the excess pressure that occurs.
Es ist ferner bei mit Überdruck arbeitenden Kohlenstaubmühlen bekannt, die Mahlgutzuführu.ngseinrichtung oder Teile oberhalb derselben mit einem begehbaren Gehäuse zu umgeben, das dauernd oder zeitweise von einer Luftquelle unter Überdruck gesetzt wird, um Störungen während des Betriebes beseitigen zu können.It is also known in pulverized coal mills working with positive pressure, the Mahlgutzuführu.ngseinrichtung or parts above it with a walk-in To surround the housing, which is permanently or intermittently by an air source under positive pressure is set in order to be able to eliminate malfunctions during operation.
Der Erfindung liegt die Aufgabe zugrunde, nicht nur den Kohlenstaubaustritt an den umlaufenden Teilen, sondern im Gesamtbereich der Mühle zu verhindern. Dies wird erfindungsgemäß dadurch erreicht, daß man die Mühle einschließlich des Antriebes in einem druckdichten Gehäuse unterbringt, in welches Luft mit einem Druck eingeführt wird, der mindestens :@o groß ist wie der in der Mühle herrschende Druck. Im weiteren Ausbau der Erfindung wird diese Luft durch das druckdichte Gehäuse geleitet und zweckentsprechend, gegebenenfalls nach weiterer Erwärmung, als Zweitluft weiterverwendet. Besondere Vorteile des Erfindungsgegenstandes bestehen darin, daß der durch den austretenden Kohlenstaub bisher bewirkte Verschleiß der umlaufenden Teile vermieden und die Verschmutzung der Umgebung verhindert wird. Ferner ergibt sich eine wärmetechnische Verbesserung durch Ausnutzung der von dem Mühlengehäuse an die Umgebung abgegebenen Wärme zum Vorwärmen von Luft.The invention is based on the object not only of the coal dust outlet on the rotating parts, but in the entire area of the mill. this is achieved according to the invention that the mill including the drive housed in a pressure-tight housing, into which air is introduced at a pressure that is at least: @o great as the pressure prevailing in the mill. In the further Expansion of the invention, this air is passed through the pressure-tight housing and appropriately used, if necessary after further heating, as secondary air. Particular advantages of the subject matter of the invention are that the escaping coal dust previously caused wear of the rotating parts avoided and pollution of the environment is prevented. Furthermore, there is a thermal engineering Improvement by utilizing the amount released into the environment by the mill housing Heat to preheat air.
Ein Ausführungsbeispiel des Erfindungsgegenstandes ist in der Zeichnung schematisch dargestellt.An exemplary embodiment of the subject matter of the invention is shown in the drawing shown schematically.
Die Mühle i ist von einem druckdichten Gehäuse 2 umgeben, in das bei 3 Luft mit höherem Druck eintritt, als in der Mühle herrscht. Durch die Leitung. werden Luft und Rauchgas der -Mühle zugeleitet und oben aus ihr durch die Leitung 5 das Kohlenstaub-Rauchgas-Luft-Gemisch abgeführt. Die Kohlenzuführungsleitung ist mit 7 bezeichnet. Durch die Leitung 6 tritt die Druckluft aus dem Gehäuse 2 aus.The mill i is surrounded by a pressure-tight housing 2, in which at 3 Air enters at a higher pressure than that in the mill. Through the line. air and flue gas are fed to the mill and out of it through the pipe at the top 5 removed the coal dust-flue gas-air mixture. The coal feed line is denoted by 7. The compressed air exits the housing 2 through the line 6.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEST3116A DE916784C (en) | 1951-03-03 | 1951-03-03 | Device for avoiding the escape of coal dust from coal mills operated with excess pressure and a method for operating a coal dust furnace with the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEST3116A DE916784C (en) | 1951-03-03 | 1951-03-03 | Device for avoiding the escape of coal dust from coal mills operated with excess pressure and a method for operating a coal dust furnace with the same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE916784C true DE916784C (en) | 1954-08-19 |
Family
ID=7453064
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DEST3116A Expired DE916784C (en) | 1951-03-03 | 1951-03-03 | Device for avoiding the escape of coal dust from coal mills operated with excess pressure and a method for operating a coal dust furnace with the same |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE916784C (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE404075C (en) * | 1922-08-10 | 1924-10-10 | Hermann Klug | Process for keeping briquette factories free of dust |
| DE711948C (en) * | 1940-10-19 | 1941-10-31 | Kohlenscheidungs Ges M B H | Mill flushed by a gas stream |
-
1951
- 1951-03-03 DE DEST3116A patent/DE916784C/en not_active Expired
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE404075C (en) * | 1922-08-10 | 1924-10-10 | Hermann Klug | Process for keeping briquette factories free of dust |
| DE711948C (en) * | 1940-10-19 | 1941-10-31 | Kohlenscheidungs Ges M B H | Mill flushed by a gas stream |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| DE916784C (en) | Device for avoiding the escape of coal dust from coal mills operated with excess pressure and a method for operating a coal dust furnace with the same | |
| DE1136675B (en) | Method and device for performing endothermic processes on the sintering belt | |
| DE683203C (en) | Insertion tube for thermocouples for devices for pressure hydrogenation of carbonaceous substances | |
| DE577616C (en) | Method of burning cement in a shaft furnace | |
| DE668816C (en) | Process and device for the production of glued phosphates | |
| DE698732C (en) | Process for the simultaneous direct production of iron or its alloys and cement or hydraulic lime and a rotary kiln for its execution | |
| DE2748946A1 (en) | BEAM GRINDING PROCESS AND DEVICE FOR CARRYING OUT THE PROCESS | |
| EP1024186B1 (en) | Telescoping tube for a discharging device of a coke oven charging car | |
| DE1796018A1 (en) | Method and device for the production of cement clinker | |
| DE3520927A1 (en) | Device for heat-treating fine granular material | |
| DE680748C (en) | Process for the production of barium sulfide by reducing barite in a rotary kiln | |
| DE849688C (en) | Device for smoldering fuels with purge gases | |
| DE462207C (en) | Device for introducing dusty or powdery substances into the melting zone of shaft furnaces, especially blast furnaces | |
| DE629540C (en) | Process for the reduction of metal oxides, especially iron ores, in a rotary kiln in an air-diluted room | |
| DE1244213B (en) | Slag discharge device for slag refining plants | |
| DE439775C (en) | Schraem process with bar or chain cutting machines in steeply mounted floors | |
| DE4200723A1 (en) | Drum-type mining machine with water jets - has closed water-cooling circuit coupled by heat-exchanger to that supplying jets with water | |
| DE714072C (en) | Gas generator with dry ash discharge | |
| DE534183C (en) | Method and apparatus for grinding and hydrating cement and similar grist | |
| DE824028C (en) | Rotary kiln with a device for quick cooling (quenching) of hot cement clinker | |
| DE636803C (en) | Mold, especially dovetailing, for lignite briquette presses made of wear-resistant, hard porcelain | |
| AT209294B (en) | Device for sealing gear and bearing housings, especially in rolling mills | |
| DE2126527C3 (en) | Device for grinding and firing raw plaster of paris | |
| DE966096C (en) | Process for regulating the temperature of a dusty raw gas flowing in a pipe | |
| DE19811672C2 (en) | Process for separating coked metal parts |