EP0151746A2 - Dispositif d'extraction des mâchefers pour appareils à combustion de grande capacité - Google Patents

Dispositif d'extraction des mâchefers pour appareils à combustion de grande capacité Download PDF

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Publication number
EP0151746A2
EP0151746A2 EP84115332A EP84115332A EP0151746A2 EP 0151746 A2 EP0151746 A2 EP 0151746A2 EP 84115332 A EP84115332 A EP 84115332A EP 84115332 A EP84115332 A EP 84115332A EP 0151746 A2 EP0151746 A2 EP 0151746A2
Authority
EP
European Patent Office
Prior art keywords
slag
discharge device
chute
slag discharge
wear plates
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.)
Granted
Application number
EP84115332A
Other languages
German (de)
English (en)
Other versions
EP0151746B1 (fr
EP0151746A3 (en
Inventor
Peter Lorenz
Adolf Ing.-Grad. Magnus
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.)
K+K Ofenbau GmbH
Original Assignee
K+K Ofenbau 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 K+K Ofenbau GmbH filed Critical K+K Ofenbau GmbH
Priority to AT84115332T priority Critical patent/ATE35732T1/de
Publication of EP0151746A2 publication Critical patent/EP0151746A2/fr
Publication of EP0151746A3 publication Critical patent/EP0151746A3/de
Application granted granted Critical
Publication of EP0151746B1 publication Critical patent/EP0151746B1/fr
Expired legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J1/00—Removing ash, clinker, or slag from combustion chambers
    • F23J1/02—Apparatus for removing ash, clinker, or slag from ash-pits, e.g. by employing trucks or conveyors, by employing suction devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J2900/00—Special arrangements for conducting or purifying combustion fumes; Treatment of fumes or ashes
    • F23J2900/01021—Removing ashes from the ash pit using reciprocating means, e.g. pushers

Definitions

  • the invention relates to a slag discharge device for large combustion plants with a slag chute and a discharge pan adjoining its lower end.
  • Such slag discharge devices are used to take up the residues conveyed from the combustion chamber into the slag fall chute after the combustion process and to reduce the temperature to below 70 ° C. as far as possible by means of time periods that may vary over time, before these residues reach a downstream transport device.
  • the slag discharge devices can be operated dry or wet.
  • the dry driving style is used in particular in waste incineration plants, since the grain size of the slag is comparatively smaller and the temperature can be reduced more quickly.
  • the dry driving style has the advantage that its operating costs are much cheaper than when driving wet.
  • the residues fall from above through the slag chute into a water bath in the discharge trough and are deleted there.
  • the height of the water level is dimensioned so that no false air can enter the incinerator through the chute.
  • a disadvantage of the wet process is that the water content of the discharged slag is 30% by weight or more.
  • high costs arise for the subsequent transport to the landfill.
  • the invention is therefore based on the object of designing the slag discharge device in particular in the area of the slag chute, but also in the area of the discharge trough, in such a way that its Operational safety is significantly improved, especially no "burning" of the slag chute.
  • This object is achieved in that the inner sides of the slag chute are covered with wear plates arranged at a distance from them. In this way it is prevented that the glowing slag comes into direct contact with the walls of the slag chute, thus preventing direct heat transfer.
  • the walls of the slag chute therefore no longer reach the temperatures that previously led to "burning" of the walls, even with high thermal loads.
  • the main advantage here is that a conventional flow inhibiting the transfer of temperature is established in the space between the wear plates and the walls of the slag chute.
  • the wear plates which can be made of particularly abrasion-resistant material, prevent abrasion of the walls of the slag chute.
  • the wear plates on the side walls of the slag chute reach to the bottom of the discharge trough.
  • the wear plates only extend to above the range of movement of an ejection plunger, as is regularly used in such slag discharge devices, and form guide edges there. Both measures extend the protected area of the slag discharge device, while the latter measure additionally stabilizes the push rod.
  • the bottom and both side walls of the discharge pan with exchangeable wear plates are provided.
  • Such plates can be easily replaced with new plates when they are abraded, without the need to disassemble entire walls.
  • they can be made from a material that is particularly abrasion-resistant and adapted to the respective requirements.
  • the slag discharge device is to be operated n 3 ß, it is particularly advantageous if at least one fresh water line opens into the space between the slag case and wear plates, expediently in the upper area of the space and - if several fresh water lines are connected - over the circumference of the slag fall shaft distributed.
  • this has the advantage that the wear plates are cooled by the incoming fresh water, which extends their life.
  • the extinguishing water arrives directly in the area of the slag discharge device in which the main extinguishing process takes place, namely in the area where the slag chute opens into the discharge trough.
  • the welding plates in the slag chute are conveniently attached to the inner walls of the housing by means of spacers. Their distance from the inside of the slag chute should be about 20 mm. In order to avoid dust formation when driving in a dry manner, water injection should be provided at the outlet of the discharge trough.
  • the invention is illustrated in more detail using an exemplary embodiment shown in vertical section. It shows a slag discharge device 1 with a slag chute 2 and a discharge trough 3.
  • the slag chute 2 has a rectangular cross section and runs vertically. Its walls 4, 5 are reinforced on the outside with vertical and horizontal stiffening plates 6, 7, 8, 9, 10. At the upper edge, a flange profile 11 is provided, via which the slag discharge device 1 can be attached to the overlying part of the slag chute, not shown here.
  • the lower end of the slag chute 2 opens into the discharge trough 3.
  • the discharge trough 3 has an arcuate bottom 12 which, in this view, merges to the left into a straight, diagonally upward discharge chute 13.
  • the extension chute 13 also has a rectangular cross section with the bottom wall 14, the side walls 15 and the ceiling wall 16.
  • the top wall 16 connects directly to the wall 4 of the slag chute 2.
  • the slag chute 2 is worn on all sides Sheets 17, 18, 19 clad, in fact at a distance from the walls 4, 5 of the chute case 2. Spacers, for example designated 2o, ensure the distance.
  • the wear plates 18 attached to the side walls extend into the application trough 3 and there have an arcuate, parallel to the bottom 12 finish 21.
  • In the space 22 between the wear plates 17, 18, 19 and the walls 4, 5 opens one Fresh water line 23.
  • water is introduced into the intermediate space 22 via this fresh water line 23 and in this way cools the wear plates 17, 18, 19 and then arrives in the discharge trough 3, precisely where the extinguishing process in the The main thing takes place.
  • the water level indicated by the dash-dotted line is aimed at, so that no false air can get into the slag chute 2 via the opening of the extension chute 13.
  • a convection flow also cools the wear plates 17, 18, 19 in the intermediate space 22.
  • the bottom 12 of the discharge trough 3 and its side walls, like the bottom wall 14 and the side wall 15 of the extension chute 13, are covered with wear plates 24, 25, 26, 27, 28, 29, 3 0 , 31, which can be replaced without the need that other parts have to be removed for this.
  • a spray nozzle 32 is inserted into the top wall 16. It is used to bind the dust in the dry operation of the slag discharge device.
  • This extension plunger 33 On the opposite side of the discharge chute 13 of the slag chute 2 is the drive area for an extension plunger 33.
  • This extension plunger 33 has on its front side a plunger plate 34 that extends across the entire width of the discharge trough 3 and is reinforced on the front side with a steel plate 35.
  • the push rod 33 rests on the wear plate 24 over the lower edge of this steel plate 35.
  • the steel plate 35 can be rotated through 180 ° so that it has twice the service life.
  • the tappet plate 34 is fastened to two arc-shaped tappet arms 36 which are arranged parallel and at a distance from one another, so that only the front tappet arm 36 can be seen here.
  • the upper ends of the tappet arms 36 have projections 37, on each of which a guide roller 38 is mounted.
  • Each of these guide rollers 38 is positively guided between two guide tracks 39, 4o running parallel to one another.
  • the guideways 39, 4o have an arc shape which corresponds to that of the bottom 12 of the discharge trough 3. With a displacement in the direction of the extension chute 13, the extension plunger 33 therefore does not perform any pivoting movement.
  • a hydraulic cylinder 41 is arranged on the outside of both side walls for the displacement of the push rod 33, only the rear hydraulic cylinder 41 being shown in broken lines here.
  • the respective upper ends of the hydraulic lids 41 engage on pins which project outwards through slots 42 and are not shown here.
  • the lower ends of the hydraulic cylinder 41 are hinged to corresponding bases 43.
  • a cover plate 44 with an overlying sealing plate 45 is mounted on the upper edges of the tappet arms 36, in such a way that only a small gap remains between the wearing plate 45 and the wall 5 or the wearing plate 19. This gap remains the same during the entire displacement movement of the push rod 33, since it does not perform any pivoting movement because of the special guidance.
  • the upper part of the drive area is located within a housing 46.
  • This housing is closed at the bottom by a cover plate 47 that is located somewhat above the water level line.
  • the cover plate 47 has only narrow slots for the passage of the tappet arms 36, it also being advantageous here that the push-out tappet 33 does not perform any pivoting movement when it is displaced.
  • the slits not visible here in the cover plate 47 can be additionally sealed by rubber or brush strips. In this way, penetration of dust in dry operation and vapors in wet operation into the drive area is largely avoided.
  • the bottom 12 is arched with its rear end up to the water level line and forms an overflow edge 48. Dry ash or ash sludge is pushed over this overflow edge 48. This ash is inevitably taken in small quantities by the push rod 33 when it is pushed backwards and then after appropriate accumulation and conveyed over the overflow edge 48 into a collecting basin 49 arranged underneath. In the case of revisions, the ash collected there can then be removed via a cover 5o screwed on at the bottom. In addition, an overflow 51 is provided at the level of the water level so that no blockages occur. An additional water drain 56 is provided in the cover 50. Another water drain 57 is arranged at the lowest point of the discharge trough 3.
  • a hydraulic pump 52 with an electric drive motor 53 is flanged to the rear of the slag discharge device 1.
  • the hydraulic unit 52 houses an oil tank and a hydraulic pump, which is driven by the drive motor 53 and serves to supply the hydraulic cylinders 41.
  • cleaning openings 54, 55 are provided in the slag chute 2 and in the housing 46.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Gasification And Melting Of Waste (AREA)
  • Furnace Details (AREA)
EP84115332A 1984-02-03 1984-12-13 Dispositif d'extraction des mâchefers pour appareils à combustion de grande capacité Expired EP0151746B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84115332T ATE35732T1 (de) 1984-02-03 1984-12-13 Schlackenaustragseinrichtung fuer grossfeuerungen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19848403134U DE8403134U1 (de) 1984-02-03 1984-02-03 Schlackenaustragseinrichtung fuer grossfeuerungen
DE8403134U 1984-02-03

Publications (3)

Publication Number Publication Date
EP0151746A2 true EP0151746A2 (fr) 1985-08-21
EP0151746A3 EP0151746A3 (en) 1987-03-04
EP0151746B1 EP0151746B1 (fr) 1988-07-13

Family

ID=6763133

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84115332A Expired EP0151746B1 (fr) 1984-02-03 1984-12-13 Dispositif d'extraction des mâchefers pour appareils à combustion de grande capacité

Country Status (3)

Country Link
EP (1) EP0151746B1 (fr)
AT (1) ATE35732T1 (fr)
DE (2) DE8403134U1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4301619A1 (de) * 1993-01-22 1994-07-28 Babcock Energie Umwelt Vorrichtung zum Austragen von Asche
EP0740110A2 (fr) * 1995-03-09 1996-10-30 MARTIN GmbH für Umwelt- und Energietechnik Procédé et appareil pour le traitement de résidus solides de combustion d'une installation de combustion, notamment d'un incinérateur

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE392641A (fr) *
DE867121C (de) * 1950-01-01 1953-02-16 Josef Martin Entschlackungseinrichtung fuer Grossfeuerungen

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE392641A (fr) *
DE867121C (de) * 1950-01-01 1953-02-16 Josef Martin Entschlackungseinrichtung fuer Grossfeuerungen

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4301619A1 (de) * 1993-01-22 1994-07-28 Babcock Energie Umwelt Vorrichtung zum Austragen von Asche
BE1008557A3 (fr) * 1993-01-22 1996-06-04 Babcock Energie Umwelt Dispositif d'extraction de cendres.
EP0740110A2 (fr) * 1995-03-09 1996-10-30 MARTIN GmbH für Umwelt- und Energietechnik Procédé et appareil pour le traitement de résidus solides de combustion d'une installation de combustion, notamment d'un incinérateur
US5711233A (en) * 1995-03-09 1998-01-27 Martin Gmbh Fuer Umwelt- Und Energietechnik Process and arrangement for the treatment of solid combustion residues in a combustion installation, in particular in a waste incineration plant
EP0740110A3 (fr) * 1995-03-09 1998-03-11 MARTIN GmbH für Umwelt- und Energietechnik Procédé et appareil pour le traitement de résidus solides de combustion d'une installation de combustion, notamment d'un incinérateur

Also Published As

Publication number Publication date
EP0151746B1 (fr) 1988-07-13
ATE35732T1 (de) 1988-07-15
DE3472714D1 (de) 1988-08-18
EP0151746A3 (en) 1987-03-04
DE8403134U1 (de) 1984-05-30

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