EP0846918B1 - Methode pour la combustion de combustible dans un four tournant et four tournant pour la mise en oeuvre de ce procédé - Google Patents

Methode pour la combustion de combustible dans un four tournant et four tournant pour la mise en oeuvre de ce procédé Download PDF

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Publication number
EP0846918B1
EP0846918B1 EP97121063A EP97121063A EP0846918B1 EP 0846918 B1 EP0846918 B1 EP 0846918B1 EP 97121063 A EP97121063 A EP 97121063A EP 97121063 A EP97121063 A EP 97121063A EP 0846918 B1 EP0846918 B1 EP 0846918B1
Authority
EP
European Patent Office
Prior art keywords
air
annular gap
fed
segment
end wall
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 - Lifetime
Application number
EP97121063A
Other languages
German (de)
English (en)
Other versions
EP0846918A2 (fr
EP0846918A3 (fr
Inventor
Klaus Dr. Juszak
Rudolf Hiller
Walter Dr. Schäfers
Hans-Peter Rubbert
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.)
Evonik Operations GmbH
Original Assignee
Degussa 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 Degussa GmbH filed Critical Degussa GmbH
Publication of EP0846918A2 publication Critical patent/EP0846918A2/fr
Publication of EP0846918A3 publication Critical patent/EP0846918A3/fr
Application granted granted Critical
Publication of EP0846918B1 publication Critical patent/EP0846918B1/fr
Anticipated expiration legal-status Critical
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
    • F23G5/20—Incineration of waste; Incinerator constructions; Details, accessories or control therefor having rotating or oscillating drums
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2202/00—Combustion
    • F23G2202/10—Combustion in two or more stages
    • F23G2202/103—Combustion in two or more stages in separate chambers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2207/00—Control
    • F23G2207/30—Oxidant supply

Definitions

  • the invention relates to a method for burning combustible material in a rotary kiln with a fixed front wall and a rotatable to form the end wall to form an annular gap Rotary tube in which the firing material and at least one main stream of swirled combustion air and a partial flow of combustion air can be supplied.
  • This object is achieved in that in addition to Main flow of swirled main air over at least one segment of the Annular gap Annular air is supplied, which the Annular gap segment flows with swirl, which is the swirl of Main air is rectified or opposed.
  • a particularly simple procedure for feeding the Annular air is achieved when the annular air is above a at least partially ring-like upstream of the annular gap segment Air template is fed to at least two places Annular gap air streams are supplied based on the Annular gap segment are spaced in the circumferential direction and on which the inflow direction of the annular gap air flows into the Air template can be changed.
  • the two partial flows are preferably those of the air charge are supplied, adjusted in terms of their volume flow.
  • annular gap air it seems advisable not to use the entire annular gap Apply annular gap air in order to avoid annular gap air directly on the firing material lying in the area of the tube sheet. It is therefore preferred to use an upper one based on the tube sheet To apply annular gap air to the ring segment.
  • the invention is also directed to a rotary kiln with a fixed end wall and one under training Annular gap to the fixed end wall arranged rotary tube, where at least one main stream is twisted Combustion air as the main air through at least one opening in the end wall as well as firing material and a partial flow Combustion air can be fed to the rotary tube.
  • the invention provides that Annular gap is preceded by an additional air supply Combustion air with a swirl relative to the swirl of the main air is acted upon
  • Air supply over at least two based on the annular gap Air can be applied to spaced connections, being at the inflow points in the air receiver Actuators for setting the inflow direction of the respective air flow are provided in the air receiver.
  • the air template either as Ring segment is formed or as an annular space in which Cover the segment of the annular gap a cover plate is arranged.
  • FIG. 1 is a rotary kiln incinerator 1 in schematic Side view shown, consisting of a fixed end wall 2, a relative to the end wall rotatable rotary tube 3 and one downstream of the rotary tube 3 fixed afterburning chamber 4.
  • the rotary kiln In the area of the front wall, the rotary kiln is used for the fired material B and for combustion Primary air P supplied, which is divided into main air H and annular gap air R. is.
  • the annular gap air is supplied in two partial flows R1 and R2.
  • the post-combustion chamber is used to secure the burnout in the RG flue gas secondary air S still supplied.
  • the firing material is fed into the interior of the rotary tube 3 via an opening 6 penetrating chute 7 supplied.
  • other entry elements are in the entry of other liquid, flammable or other Firing goods, as well as any necessary support burner not shown.
  • the main air H is via a main air duct opening above the chute 8 introduced, in which known swirl elements 9 are arranged.
  • the swirl direction of the main air is shown schematically by the arrow DH. This is rectified with the direction of rotation of the rotary tube 3, which in the FIG. 2 is shown schematically by arrow D3.
  • the annular gap 5 is a ring-like Air receiver 10 upstream.
  • the ring-like air reservoir 10 are two inflow chambers lying in the ring plane 11 and 12 assigned in the circumferential direction of the ring-like air template 10 are arranged at a distance. These can be trained separately be and in connection with the air supply (see FIG: 2) or partial volumes of the annulus 10 itself (see FIG. 3).
  • In these inflow chambers are inflow openings 13 in a plane perpendicular to the axis of the air receiver and 14 are provided, through which the partial flows R1 and R2 of the annular gap air in enter the air template.
  • the inlet openings 13 and 14 are in the air supply Trim tabs 15 and 16 upstream, which are perpendicular to the plane of the drawing the FIG. 2 extend and pivotable by means of axes 15a and 16a are, the pivot axis is below the inlet opening.
  • both flaps 15 and 16 When both flaps 15 and 16 are in their left position, both kick Sub-flows R1 and R2 to the left in the air template and build one in it Counter-clockwise rotation.
  • air enters the annular gap 5 which is provided with a swirl direction DR, which is the swirl direction DH Main air and the direction of rotation D3 of the rotary tube 3 is opposite.
  • Dependent on from the position of the flaps 15 and 16 can thus in the air template creates a swirl flow clockwise or counterclockwise become.
  • FIG. 4 is a circuit diagram for the supply of the primary combustion air P shown.
  • the primary air delivered by a blower 18 is by means of an adjustable trimming device 19 in main air HL and Annular gap air R divided.
  • the annular gap air R branches into two partial flows R1 and R2, the distribution of the annular gap air R between the two partial flows is adjustable by trim tabs 20 and 21.
  • the twist direction of the two Partial flows are then determined by the trim tabs 15 and 16.
  • the primary combustion air is 60% of the main air H and 40% distributed over the annular gap air R, the control ranges in the range from 70/30 to 30/70.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Incineration Of Waste (AREA)
  • Muffle Furnaces And Rotary Kilns (AREA)

Claims (6)

  1. Procédé de combustion de charges combustibles dans un four rotatif comprenant une paroi frontale stationnaire et un tube rotatif qui tourne en formant une fente annulaire par rapport à la paroi frontale, procédé dans lequel la charge combustible et au moins un courant principal d'air comburant mis en rotation sont envoyés au travers de la paroi frontale et un courant partiel d'air comburant est envoyé en supplément dans le four rotatif, caractérisé en ce que le courant partiel d'air comburant est envoyé par au moins un segment de la fente annulaire en tant qu'air de fente annulaire en giration, le sens de giration du courant partiel pouvant être modifié de sorte que cette giration soit orientée dans le même sens ou en sens contraire de celle de l'air principal.
  2. Procédé suivant la revendication 1, caractérisé en ce que l'air de fente annulaire est envoyé par l'intermédiaire d'un collecteur d'air au moins en forme d'anneau partiel, monté en amont du segment de fente annulaire et auquel sont envoyés au moins des flux partiels d'air de fente annulaire au moins en deux points, qui sont distants dans la direction périphérique par rapport au segment de fente annulaire et sur lesquels peut être modifiée la direction d'afflux des flux d'air partiels de fente annulaire dans le collecteur d'air.
  3. Procédé suivant l'une des revendications 1 et 2, caractérisé en ce que les deux flux partiels envoyés au collecteur d'air sont réglés quant à leur débit volumique.
  4. Procédé suivant l'une au moins des revendications 1 à 3, caractérisé en ce qu'un segment de tube supérieur par rapport au fond de tube est alimenté en air de fente annulaire.
  5. Four rotatif comprenant une paroi frontale stationnaire (2) et un tube rotatif (3) disposé par rapport à la paroi (2) en formant une fente annulaire (5), four dans lequel au moins un courant principal d'air comburant en tant qu'air principal (H) peut être envoyé dans le tube rotatif au travers d'au moins un conduit d'air principal (8), avec des éléments de mise en rotation (9) disposés intérieurement, de la paroi frontale (2), ainsi qu'une charge combustible et un courant partiel supplémentaire d'air comburant, caractérisé en ce qu'un collecteur d'air (10) est monté en amont de la fente annulaire (5), collecteur auquel sont associées au moins deux ouvertures d'admission (13, 14), disposées à distance par rapport à la fente annulaire (5), pour l'alimentation en courant partiel d'air comburant (R), et en ce que des volets d'équilibrage (15, 16) sont montés en amont des ouvertures d'admission (13, 14) pour le réglage de la direction d'afflux du courant d'air respectif (R1 ; R2) dans le collecteur d'air (10).
  6. Four rotatif suivant la revendication 5, caractérisé en ce que le collecteur d'air (10) est réalisé sous forme de segment annulaire ou d'espace annulaire, dans lequel est disposée une tôle de recouvrement (17) pour recouvrir un segment de la fente annulaire (5).
EP97121063A 1996-12-06 1997-12-01 Methode pour la combustion de combustible dans un four tournant et four tournant pour la mise en oeuvre de ce procédé Expired - Lifetime EP0846918B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19650785A DE19650785C2 (de) 1996-12-06 1996-12-06 Verfahren zum Verbrennen von Brenngut in einem Drehrohrofen und Drehrohrofen zur Durchführung des Verfahrens
DE19650785 1996-12-06

Publications (3)

Publication Number Publication Date
EP0846918A2 EP0846918A2 (fr) 1998-06-10
EP0846918A3 EP0846918A3 (fr) 1999-01-20
EP0846918B1 true EP0846918B1 (fr) 2004-07-21

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ID=7813916

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97121063A Expired - Lifetime EP0846918B1 (fr) 1996-12-06 1997-12-01 Methode pour la combustion de combustible dans un four tournant et four tournant pour la mise en oeuvre de ce procédé

Country Status (2)

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EP (1) EP0846918B1 (fr)
DE (2) DE19650785C2 (fr)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1451491A1 (de) * 1963-02-11 1969-09-04 Keller Peukert Gmbh Waermetech Einrichtung zur Verbrennung von Muell und anderen Abfallstoffen
CH418508A (de) * 1963-09-19 1966-08-15 Von Roll Ag Drehrohrofen zur Verbrennung von Rückständen, insbesondere von chemischen Abfällen
CH522174A (de) * 1970-05-06 1972-04-30 Wiedermann Wolfgang Drehtrommelofen zur Müllverbrennung
CH679328A5 (fr) * 1988-07-29 1992-01-31 W & E Umwelttechnik Ag
JPH05223228A (ja) * 1992-02-10 1993-08-31 Hitachi Zosen Corp 回転炉
DE4224571C2 (de) * 1992-07-24 1994-06-16 Babcock Anlagen Gmbh Drehrohrofen

Also Published As

Publication number Publication date
DE19650785A1 (de) 1998-07-02
DE59711786D1 (de) 2004-08-26
DE19650785C2 (de) 1998-12-24
EP0846918A2 (fr) 1998-06-10
EP0846918A3 (fr) 1999-01-20

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