DE929017C - Coal mill for pulverized fuel combustion - Google Patents
Coal mill for pulverized fuel combustionInfo
- Publication number
- DE929017C DE929017C DED3304D DED0003304D DE929017C DE 929017 C DE929017 C DE 929017C DE D3304 D DED3304 D DE D3304D DE D0003304 D DED0003304 D DE D0003304D DE 929017 C DE929017 C DE 929017C
- Authority
- DE
- Germany
- Prior art keywords
- sifter
- coal mill
- burners
- mill
- fuel 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
Links
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05C—ELECTRIC CIRCUITS OR APPARATUS SPECIALLY DESIGNED FOR USE IN EQUIPMENT FOR KILLING, STUNNING, OR GUIDING LIVING BEINGS
- H05C1/00—Circuits or apparatus for generating electric shock effects
- H05C1/04—Circuits or apparatus for generating electric shock effects providing pulse voltages
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C13/00—Disintegrating by mills having rotary beater elements ; Hammer mills
- B02C13/13—Disintegrating by mills having rotary beater elements ; Hammer mills with horizontal rotor shaft and combined with sifting devices, e.g. for making powdered fuel
-
- 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
- F23K3/00—Feeding or distributing of lump or pulverulent fuel 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K2203/00—Feeding arrangements
- F23K2203/008—Feeding devices for pulverulent fuel
Description
Die Erfindung betrifft eine Kohlenmühle mit Stromsichter zum Betrieb von Brennstaubfeuerungen nach Patent 92,3213- Sie besteht darin, daß der Sichterauslaß etwa vom größten Sichterquerschnitt ab in einzelne Taschen unterteilt ist, welche mittels absperr- und regelbarer Rohrleitungen mit den Staubbrennern verbunden sind.The invention relates to a coal mill with a stream sifter for operation of pulverized fuel furnaces according to patent 92,3213- It consists in the fact that the classifier outlet is divided roughly from the largest sifter cross-section into individual pockets, which are connected to the dust burners by means of shut-off and controllable pipes.
Bei Zündfeuerungen, welche mit besonders feinem Brennstaub betrieben werden sollen, macht die Beschaffung dieses Staubes Schwierigkeiten. Zwar kann er aus dem zu den Hauptbrennern fließenden Staubstrom gewonnen werden, doch ist dann der -Einbau eines Sichters in eine Staubleitung erforderlich, der die Druckverhältnisse stark beeinflußt, und außerdem ein Staubbehälter. Da aber die Gefahr der Selbstentzündung bei Feinstaub besonders groß ist, wäre unmittelbare Einblasung zu bevorzugen. Diese Ausbildung der Mühle bezweckt die Erfindung.With ignition systems that operate with particularly fine fuel dust should be, the procurement of this dust makes difficulties. Although he can can be obtained from the dust stream flowing to the main burners, but then it is -Installation of a sifter in a dust line is required, the pressure conditions strongly influenced, and also a dust container. But there is the risk of spontaneous combustion is particularly large in the case of fine dust, direct injection would be preferred. These The invention aims at training the mill.
Durch die Unterteilung des Stromsichters, etwa vom größten Sichterquerschnitt an, in mehrere Zellen mit einzeln absperrbaren und regelbaren Ableitungen ist die Möglichkeit gegeben, aus einer Mühle gleichzeitig Mahlgut verschiedener Feinheit unmittelbar zu entnehmen und die Feinheit in jedem Rohrstrang noch zu beeinflussen.By subdividing the flow sifter, for example from the largest sifter cross-section on, in several cells with individually lockable and controllable drains is the It is possible to simultaneously produce grist of different fineness from one mill can be taken directly and the fineness in each pipe string can still be influenced.
Soll die Mühle auf Zündbrenner arbeiten, so werden die nach den Hauptbrennern führenden Leitungen abgesperrt und in den nach den Zündbrennern führenden Leitungen die Absperrungen geöffnet. Infolge der für die Zündbrenner benötigten geringen Luftmenge wird die Sichtung in der Mühle weiter getrieben als im Regelbetrieb, und mit Hilfe der Absperrungen in den Leitungen kann die Feinheit geregelt werden. Infolge der bis in den größten Sichterquerschnitt reichenden Zellenwände wird nicht der ganze Sichterquerschnitt zur Sichtung ausgenutzt, wohl aber ein größerer, als den Zellenquerschnitten entspricht. Dadurch wird Überfeinerung vermieden, welche bei Mahltrocknung leicht zu Übertrocknung mit Verpuffungsgefahr führt.If the mill is to work on pilot burners, they will work after the main burners lines leading to it and in the lines leading to the pilot burners the barriers open. As a result of the small amount of air required for the pilot burners the sifting in the mill is driven further than in regular operation, and with help The fineness of the barriers in the lines can be regulated. As a result of Cell walls reaching into the largest cross-section of the sifter will not be the whole Sifter cross-section used for viewing, but a larger one than the cell cross-sections is equivalent to. This avoids overfining, which is easy with grind drying leads to overdrying with the risk of deflagration.
Sollen die Hauptbrenner gezündet werden, so werden die Absperrungen in deren Rohrleitungen allmählich geöffnet. Ein Kaltblasen der Feuerung tritt hierbei nicht ein, weil die Luft sofort brennfähigen Staub mitbringt. Durch Einregeln der Leitungen kann erreicht werden, daß der Zündbrenner dauernd mit Feinstaub mitbrennt, was zum Durchhalten geringer Teillasten notwendig ist. Um beim Abstellen einzelner Leitungen diese vom Staub freiblasen zu können, kann an jede Rohrleitung eine absperrbare Ausblaseleitung angeschlossen werden, die auch zum Zusatz von Luft benutzt werden kann, wenn wegen der Sichtung nicht genug durch die Mühle geleitet werden kann. Bei Bedarf kann der Feinstaub ganz oder teilweise in einem Abscheider niedergeschlagen und aufbewahrt werden.If the main burners are to be ignited, the shut-offs are activated gradually opened in their pipelines. A cold blowing of the furnace occurs here not because the air immediately brings with it combustible dust. By adjusting the Lines can ensure that the pilot burner burns continuously with fine dust, what is necessary to withstand low partial loads. To when parking individual Lines to be able to blow them free of dust can be shut off on each pipeline Blow out lines can be connected, which are also used to add air can if, because of the sighting, not enough can be passed through the mill. If necessary, all or part of the fine dust can be precipitated in a separator and be kept.
Die Unterteilung der Sichterhaube in mehrere Zellen wirkt sich auch auf den Regelbetrieb günstig .aus; denn sie ermöglicht, die jedem Brenner zugeführte Menge und Feinheit des Staubes zu regeln, was besonders für die Feuerung mit sogenannten Eckenbrennern wertvoll ist. Bei den häufig benutzten Schlägermühlen bewirken die Zellen, wenn sie in Richtung der Welle nebeneinandergereiht sind, eine gleichmäßige Verteilung der Mahlleistung auf die L_ änge des Mühlenläufers.The division of the sifter hood into several cells also has an effect on regular operation favorably. because it enables the input to each burner To regulate the amount and fineness of the dust, which is especially important for the combustion with so-called Corner burners is valuable. In the frequently used beater mills, the Cells, if they are lined up next to each other in the direction of the wave, a uniform one Distribution of the grinding capacity over the length of the mill rotor.
Abb. r stellt eine gemäß der Erfindung ausgebildete Schlägermühle mit Fliehkraft- und Stromsichter im Schnitt längs der Symmetrieebene, Abb. 2 in Ansicht von der Aufgabeseite dar.Fig. R shows a beater mill designed according to the invention with centrifugal and flow separator in section along the plane of symmetry, Fig. 2 in View from the task side.
Die Mühle besteht aus dem Gehäuse r und dem in bekannter Weise mit Schläger bestückten Läufer 2. Über der Schlägermühle befindet sich der Sichter, bestehend aus einem mehrflutigen Fliehkraftsichter3 und einem Stromsichter4. Die Haube dieses Stromsichters ist in vier Zellen 5 zerlegt, welche durch nicht dargestellte absperrbare Rohrleitungen mit den Brennern verbunden sind.The mill consists of the housing r and the in a known manner with Runner equipped with beater 2. The classifier is located above the beater mill, consisting of a multi-flow centrifugal separator3 and a flow separator4. the The hood of this current sifter is divided into four cells 5, which are not shown by lockable pipes are connected to the burners.
Das Mahlgut wird der Mühle durch den Aufgabestutzen 6, die Sicht- und Trockenluft axial durch die Windkanäle 7 zugeführt. Ein Abzweig 8 beliefert die Einbauten des Fliehkraftsichters 3.The grist is fed to the mill through the feed nozzle 6, the sight and dry air is supplied axially through the wind tunnels 7. A branch 8 delivers the built-in parts of the centrifugal separator 3.
Claims (2)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DED382D DE923213C (en) | 1940-01-31 | 1940-01-31 | Method for operating ignition devices for dust firing systems and ignition device for carrying out the method |
DED3304D DE929017C (en) | 1940-01-31 | 1940-09-12 | Coal mill for pulverized fuel combustion |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DED382D DE923213C (en) | 1940-01-31 | 1940-01-31 | Method for operating ignition devices for dust firing systems and ignition device for carrying out the method |
DED3304D DE929017C (en) | 1940-01-31 | 1940-09-12 | Coal mill for pulverized fuel combustion |
Publications (1)
Publication Number | Publication Date |
---|---|
DE929017C true DE929017C (en) | 1955-06-16 |
Family
ID=61002745
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DED382D Expired DE923213C (en) | 1940-01-31 | 1940-01-31 | Method for operating ignition devices for dust firing systems and ignition device for carrying out the method |
DED3304D Expired DE929017C (en) | 1940-01-31 | 1940-09-12 | Coal mill for pulverized fuel combustion |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DED382D Expired DE923213C (en) | 1940-01-31 | 1940-01-31 | Method for operating ignition devices for dust firing systems and ignition device for carrying out the method |
Country Status (1)
Country | Link |
---|---|
DE (2) | DE923213C (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1121910B (en) * | 1957-03-09 | 1962-01-11 | Peters Ag Claudius | Sifter grinders for fuel dust firing with distribution of the fuel dust air mixture on the burner supply lines |
DE3919668A1 (en) * | 1989-06-16 | 1990-12-20 | Babcock Werke Ag | Fan-type mill with separate dust and vapour outlets - has row of streamlined vanes to separate dust from vapour |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2816733C2 (en) * | 1978-04-18 | 1983-06-01 | Combustion Engineering, Inc., 06095 Windsor, Conn. | Pulverized coal firing |
DE2933060B1 (en) * | 1979-08-16 | 1980-10-30 | Steinmueller Gmbh L & C | Burner for burning dusty fuels |
DE2933040B1 (en) * | 1979-08-16 | 1980-12-11 | Steinmueller Gmbh L & C | Method for lighting a coal dust round burner flame |
AT382006B (en) * | 1979-10-09 | 1986-12-29 | N P P Techenergo | METHOD FOR BURNING LOW-QUALITY FUELS AND STEAM GENERATORS FOR IMPLEMENTING THE METHOD |
DE3105626C2 (en) * | 1981-02-16 | 1986-07-31 | L. & C. Steinmüller GmbH, 5270 Gummersbach | Method for providing the pilot dust for a pilot flame for igniting a pulverized coal burner flame |
DE3125901A1 (en) * | 1981-07-01 | 1983-01-20 | Deutsche Babcock Ag, 4200 Oberhausen | BURNER FOR BURNING DUST-MADE FUELS |
FR2584480B1 (en) * | 1985-07-05 | 1989-11-17 | Charbonnages De France | METHOD FOR REGULATING THE THERMAL POWER OF A HOUSEHOLD WASTE INCINERATOR AND INSTALLATION FOR CARRYING OUT SAID METHOD |
JP2547550B2 (en) | 1986-10-18 | 1996-10-23 | バブコツク日立株式会社 | Pulverized coal combustion method and apparatus |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2159629A (en) * | 1936-06-01 | 1939-05-23 | Babcock & Wilcox Co | Distributor for pneumatically transported solid material |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE623327C (en) * | ||||
DE623770C (en) * |
-
1940
- 1940-01-31 DE DED382D patent/DE923213C/en not_active Expired
- 1940-09-12 DE DED3304D patent/DE929017C/en not_active Expired
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2159629A (en) * | 1936-06-01 | 1939-05-23 | Babcock & Wilcox Co | Distributor for pneumatically transported solid material |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1121910B (en) * | 1957-03-09 | 1962-01-11 | Peters Ag Claudius | Sifter grinders for fuel dust firing with distribution of the fuel dust air mixture on the burner supply lines |
DE3919668A1 (en) * | 1989-06-16 | 1990-12-20 | Babcock Werke Ag | Fan-type mill with separate dust and vapour outlets - has row of streamlined vanes to separate dust from vapour |
DE3919668C2 (en) * | 1989-06-16 | 1998-04-16 | Babcock Energie Umwelt | Vapor separator for a fan mill |
Also Published As
Publication number | Publication date |
---|---|
DE923213C (en) | 1955-02-07 |
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