EP0084584A1 - Procédé et dispositif pour la combustion de charbon pulvérisé dans un courant d'air par un brûleur à charbon pulvérisé - Google Patents

Procédé et dispositif pour la combustion de charbon pulvérisé dans un courant d'air par un brûleur à charbon pulvérisé Download PDF

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Publication number
EP0084584A1
EP0084584A1 EP82100533A EP82100533A EP0084584A1 EP 0084584 A1 EP0084584 A1 EP 0084584A1 EP 82100533 A EP82100533 A EP 82100533A EP 82100533 A EP82100533 A EP 82100533A EP 0084584 A1 EP0084584 A1 EP 0084584A1
Authority
EP
European Patent Office
Prior art keywords
burner
coal dust
tube
air
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.)
Withdrawn
Application number
EP82100533A
Other languages
German (de)
English (en)
Inventor
Adolf Zimmermann
Klaus Dipl.-Ing. Hübschen
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.)
AZO-Maschinenfabrik Adolf Zimmermann GmbH
Original Assignee
AZO-Maschinenfabrik Adolf Zimmermann GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by AZO-Maschinenfabrik Adolf Zimmermann GmbH filed Critical AZO-Maschinenfabrik Adolf Zimmermann GmbH
Priority to EP82100533A priority Critical patent/EP0084584A1/fr
Publication of EP0084584A1 publication Critical patent/EP0084584A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C7/00—Combustion apparatus characterised by arrangements for air supply
    • F23C7/02—Disposition of air supply not passing through burner
    • F23C7/06—Disposition of air supply not passing through burner for heating the incoming air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D1/00—Burners for combustion of pulverulent fuel

Definitions

  • the invention relates to a method for burning coal dust in the air stream by means of a coal dust burner, and to a coal dust burner suitable therefor.
  • combustion facilities have also recently become known in which the coal dust is swirled and blown by means of blown air.
  • the coal dust is generally fed in with mechanical conveyors via metering devices.
  • Known facilities of this type are responsible for the lack, that both the mechanical conveyors and the dosing devices are prone to failure and work imprecisely. So far, these facilities have not offered a real alternative to precisely metered and controllable combustion of petroleum products.
  • the invention proposes that the coal dust to be removed in a metered manner from a bunker is swirled by means of an air stream and conveyed pneumatically to the burner and mixed with the combustion air in the burner.
  • the turbulence in the pneumatic flow ensures an even distribution and good controllability of the combustion, and in particular stagnation due to malfunctions is avoided.
  • the exact dosage of the coal dust in the conveying air can be achieved in a simple manner with the means known in pneumatic conveying systems.
  • the pneumatic conveying stream is passed over part of its length through the burner chamber of the burner for the purpose of preheating the coal dust-air mixture and, at the end of the conveying, is distributed over the cross section of the burner chamber and mixed with the combustion air.
  • the strong preheating in the combustion chamber gasifies the volatile constituents in the coal dust, so that an ignitable and well-burning coal dust mixture is formed.
  • the good mixing of the coal dust with the air to be achieved according to the invention ensures a favorable combustion process, a good burnout and thus a high economic efficiency of the process.
  • a coal dust burner with devices for metered input of coal dust into a stream of combustion air and with devices for spark ignition of the coal dust-air mixture in which, according to the invention, a part of the burner tube through which the combustion air flows is used to carry out the method explained above Length through the burner chamber and ending at the inlet-side end wall of the burner, there is an introduction tube for the coal dust conveyed pneumatically with air, and a device arranged on this end wall for distributing the coal dust over the cross-section of the combustion pipe.
  • the inlet pipe serving as a preheating pipe penetrates the inlet-side end wall of the burner and the burner pipe passes over the greater part of its length and is returned via a reversing loop, and that the mouth of the inlet pipe is at the opposite end wall Baffle plate for reflecting the coal dust in the direction of the flame and for its distribution in the combustion air which is introduced concentrically to the baffle plate.
  • the burner tube can consist of two concentric tubes of different diameters, which enclose an annular space serving as a flow preheater for the combustion air.
  • This design feature provides that the outer wall of the inner tube has a worm for guiding the combustion air flowing through the annular space, which begins at the front exit-side end of the burner tube and ends near the inlet-side end wall, and that near the front end of the burner tube on the outer tube a supply line for the combustion air coming from a blower is connected. This measure results in a very intensive heat exchange between the fresh air supplied to the burner and the combustion gases.
  • the mouth-side end part of the introduction tube for the coal dust is guided along the central axis of the burner tube and ends in a conical mouth
  • the conical, substantially bowl-shaped baffle plate on the concave side has a conical, tapered elevation in its center for deflecting the incoming conveying air -Carbon dust jet in the direction of the flame.
  • a ring burner for ignition gas is arranged near the inlet-side end wall and surrounds the baffle plate, the feed line of which penetrates the end wall.
  • This can, for example, have the shape of a pipe section which passes straight through the inner burner tube along a diameter and is flowed through by combustion air and which carries in the middle a fork which loosely overlaps the loop from two sides.
  • the coal dust burner shown consists essentially of a double-walled cylindrical burner tube 2 with the inner tube 3 and outer tube 4 arranged concentrically to one another, which enclose the annular space 5 between them, the inner tube 3 of which is machined on the outside by a sheet metal screw 6, which has the outer edges of the inner wall of the outer tube 4 abuts.
  • Combustion air is supplied to the annular space 5 between the two tubes through a supply line 7 connected laterally at the outlet-side end of the burner tube 2, which in the annular space by means of the screw 6 in tight turns around the outside of the inner tube is guided around and preheated by the burning of coal dust in the inner tube.
  • the screw 6 ends at a certain distance in front of the end wall 8 of the burner on the inlet side and enters the interior of the inner tube, which represents the combustion chamber 9, from there.
  • an essentially bowl-shaped baffle plate 10 Provided on the inside of the entry-side end wall 8 is an essentially bowl-shaped baffle plate 10, the center of which, on the concave side pointing towards the front end, has a centrally arranged conical elevation 11 opening out into a blunt tip. Compared to this elevation, the tip of which partially encompasses, there is the conically widened mouth 12 of an introduction tube 13 for the coal dust swirled with compressed air, which is blown against the baffle plate 10 and deflected by the latter in the opposite direction and thrown into the combustion air of the combustion chamber.
  • the insertion tube 13 is laterally inserted at the rear end of the burner through its end wall 8, passes through almost the entire length of the combustion chamber 9, then reverses in a loop 14 and runs in the last part up to its mouth 12 in the longitudinal axis of the burner tube.
  • a pipe section 15, which crosses the inner pipe 3 and has a diameter, is provided beyond the apex of the loop, the combustion air also flows through it for cooling and a fork loosely encompassing the loop 14 of the feed pipe 13 on its side facing the end wall 8 16 wears.
  • the coal dust can, for example — not shown — be swirled from a bunker by means of compressed air and fed into the introduction pipe 13 via a metering device, via which it enters the combustion chamber 9.
  • a gas line 17 is introduced, which opens into a ring burner 18 surrounding the baffle plate.
  • the ignition gas is ignited electrically, while the coal dust is ignited by the ignition gas.
  • a sight glass 19 is arranged in the end wall 8, in its place an open inspection hole provided with a pivotable flap can also be provided.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
EP82100533A 1982-01-27 1982-01-27 Procédé et dispositif pour la combustion de charbon pulvérisé dans un courant d'air par un brûleur à charbon pulvérisé Withdrawn EP0084584A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP82100533A EP0084584A1 (fr) 1982-01-27 1982-01-27 Procédé et dispositif pour la combustion de charbon pulvérisé dans un courant d'air par un brûleur à charbon pulvérisé

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP82100533A EP0084584A1 (fr) 1982-01-27 1982-01-27 Procédé et dispositif pour la combustion de charbon pulvérisé dans un courant d'air par un brûleur à charbon pulvérisé

Publications (1)

Publication Number Publication Date
EP0084584A1 true EP0084584A1 (fr) 1983-08-03

Family

ID=8188840

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82100533A Withdrawn EP0084584A1 (fr) 1982-01-27 1982-01-27 Procédé et dispositif pour la combustion de charbon pulvérisé dans un courant d'air par un brûleur à charbon pulvérisé

Country Status (1)

Country Link
EP (1) EP0084584A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE428952C (de) * 1923-10-16 1926-05-15 Kohlenauswertung Bamag Meguin Brennstaubfeuerung
DE549553C (de) * 1928-01-21 1932-04-25 Emmanuel Yvonneau Dampfkesselfeuerung mit zentrisch angeordneter, von ringfoermigen Rauchgasabzuegen und Ringkammern fuer den Wasserumlauf umgebener Zuendkammer
DE576469C (de) * 1931-03-19 1933-05-13 Babcock & Wilcox Dampfkessel W Verfahren und Einrichtung zur Verbesserung des Wirkungsgrades bei kohlenstaubgefeuerten Dampfkesselanlagen
DE1166406B (de) * 1959-06-27 1964-03-26 Maschf Augsburg Nuernberg Ag Kohlenstaubbrenner mit Prallplatte
DE2816768B1 (de) * 1978-04-18 1980-10-23 Ruhrkohle Ag, 4300 Essen Kohleverbrennung

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE428952C (de) * 1923-10-16 1926-05-15 Kohlenauswertung Bamag Meguin Brennstaubfeuerung
DE549553C (de) * 1928-01-21 1932-04-25 Emmanuel Yvonneau Dampfkesselfeuerung mit zentrisch angeordneter, von ringfoermigen Rauchgasabzuegen und Ringkammern fuer den Wasserumlauf umgebener Zuendkammer
DE576469C (de) * 1931-03-19 1933-05-13 Babcock & Wilcox Dampfkessel W Verfahren und Einrichtung zur Verbesserung des Wirkungsgrades bei kohlenstaubgefeuerten Dampfkesselanlagen
DE1166406B (de) * 1959-06-27 1964-03-26 Maschf Augsburg Nuernberg Ag Kohlenstaubbrenner mit Prallplatte
DE2816768B1 (de) * 1978-04-18 1980-10-23 Ruhrkohle Ag, 4300 Essen Kohleverbrennung

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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AK Designated contracting states

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Designated state(s): AT BE CH FR GB IT LI LU NL SE

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Effective date: 19840404

RIN1 Information on inventor provided before grant (corrected)

Inventor name: HUEBSCHEN, KLAUS, DIPL.-ING.

Inventor name: ZIMMERMANN, ADOLF