EP0378821B1 - Schubrost-Einrichtung zur Wärmebehandlung von Schüttgütern - Google Patents

Schubrost-Einrichtung zur Wärmebehandlung von Schüttgütern Download PDF

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Publication number
EP0378821B1
EP0378821B1 EP89123308A EP89123308A EP0378821B1 EP 0378821 B1 EP0378821 B1 EP 0378821B1 EP 89123308 A EP89123308 A EP 89123308A EP 89123308 A EP89123308 A EP 89123308A EP 0378821 B1 EP0378821 B1 EP 0378821B1
Authority
EP
European Patent Office
Prior art keywords
grate
tension elements
bulk material
heat treatment
arrangement
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
EP89123308A
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German (de)
English (en)
French (fr)
Other versions
EP0378821A3 (de
EP0378821A2 (de
Inventor
Karl Von Wedel
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.)
Individual
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to AT89123308T priority Critical patent/ATE88264T1/de
Publication of EP0378821A2 publication Critical patent/EP0378821A2/de
Publication of EP0378821A3 publication Critical patent/EP0378821A3/de
Application granted granted Critical
Publication of EP0378821B1 publication Critical patent/EP0378821B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23H—GRATES; CLEANING OR RAKING GRATES
    • F23H3/00—Grates with hollow bars
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B21/00—Open or uncovered sintering apparatus; Other heat-treatment apparatus of like construction
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D1/00—Casings; Linings; Walls; Roofs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D15/00—Handling or treating discharged material; Supports or receiving chambers therefor
    • F27D15/02—Cooling
    • F27D15/0206—Cooling with means to convey the charge
    • F27D15/0213—Cooling with means to convey the charge comprising a cooling grate
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D2003/0001—Positioning the charge
    • F27D2003/0002—Positioning the charge involving positioning devices, e.g. buffers, buffer zones
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D2003/0034—Means for moving, conveying, transporting the charge in the furnace or in the charging facilities
    • F27D2003/0038—Means for moving, conveying, transporting the charge in the furnace or in the charging facilities comprising shakers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D2003/0034—Means for moving, conveying, transporting the charge in the furnace or in the charging facilities
    • F27D2003/0042—Means for moving, conveying, transporting the charge in the furnace or in the charging facilities comprising roller trains
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D99/00—Subject matter not provided for in other groups of this subclass
    • F27D99/0073—Seals

Definitions

  • the invention relates to a moving grate device for the heat treatment of unspecific fine-grained bulk goods, comprising an upper and a lower housing, which is under the pressure of the cooling medium, a plurality of grate rows which are at least partially movable transversely to a predetermined conveying direction of the bulk goods and overlapping one another in a scale-like manner
  • Supporting structure made of side members and cross members for the movably arranged rows of grates and elongated tension elements for suspending the supporting structure, and deals in general with the lateral guidance of such sliding gratings and, above all, their improvement.
  • the supporting structure is mounted either on rollers and axes or on axes of rotation with races for receiving the conveying movement. Due to the resulting wear problems described below, a grate of the type described above was used, in which the structure is suspended from long tension elements parallel to the vertical grate longitudinal plane. Although the wear problem of the rollers or races could be eliminated, this solution was abandoned due to problems in the lateral guidance of the structure.
  • the supporting structure of such sliding grates consists of longitudinal beams which, together with the movable rows of grates themselves and with further struts, form an overall frame are stiffened.
  • thrusts from which the term “sliding grate” originates. These are 3 to 30 batches per minute, usually 70 to 150 mm in length, coordinated with the length of the overlap of the grate plates of the successive grate rows.
  • the thrusts are generated by mechanical cranks or hydraulic cylinders and directed onto the frame.
  • Either the side of the frame is guided by wheel flanges on the rollers that roll on permanently installed rail sections, or vice versa by rail sections on the side members that run back and forth on wheels equipped with wheel flanges.
  • the crossbeams receive steel plates on their underside when they are suspended from long traction elements, which rub on fixed counter plates.
  • the quality of a sliding grate lies in its resistance to the gas permeability in order to achieve a uniform gas flow in the bulk material to be treated (see K. von Wedel and R. Wagner "Are cooling gratings clinker coolers or heat recuperators?”, Cement-lime gypsum , 37th year, No. 5/1984, pp. 244-247).
  • This resistance can be achieved by appropriately fine and evenly distributed openings in the grate floor.
  • a grate to be referred to as a resistance grate has become known (EP-A-0 167 658), in which box-like grate plates and hollow supports are provided as grate supports as essential components.
  • box-like grate plates and hollow supports are provided as grate supports as essential components.
  • they have no significant influence marginal gaps to be avoided between fixed side plates and the grate plates of movable grate rows, as of course wear can also affect the procedural behavior of such a resistance grate as well as other types of sliding
  • Slatted frames generally suffer from marginal mobility for both the gas and the goods.
  • cooling grates for cement clinker the passage of the cooling air to the edges leads to wear on the side masonry due to sandblasting effects.
  • the limitation of the service life of the sliding grates due to wear often starts from the marginal gaps, especially if after wear of the wheel flanges of the rollers or the friction plates made of steel, the positive side guidance on one side of the grate changes to a frictional connection between the fixed side board and the movable grate plate. This frictional engagement is one-sided because of uneven introduction of the drawers into the frame or uneven counter-forces from the bulk material. To the extent that the abrasive material pair wears out, the opposite side becomes more accessible.
  • the oscillating frame is driven by a hydraulic cylinder on each side of the grate, the uneven application of force can be so great without complicated control devices for distributing the force to the cylinders that only one of the two cylinders does the pushing work while the other cylinder runs without pressure. Since only the one with the lower counterforce does the work with free distribution of the oil flow to the two cylinders, the friction from the side guide must be applied via the frame by the opposite cylinder force. Because of the limited rigidity of the frame, particularly large forces act on one side on the side guide of the grate.
  • the invention has for its object to form the edge gaps of sliding grates so tight that they meet the quality requirements for a resistance grate.
  • the invention aims to ensure, by the formation of sliding grates, that the procedural behavior cannot deteriorate due to wear, in the knowledge that this depends not insignificantly on changing marginal gaps and, incidentally, also on the sliding gaps and is therefore subject to wear Solution is not allowed.
  • this object is achieved in a sliding grate of the type described in the introduction by tension elements which form an angle of attack of more than 3 degrees against the vertical grate longitudinal plane.
  • tension elements which form an angle of attack of more than 3 degrees against the vertical grate longitudinal plane.
  • the own weight of the grate results in horizontal tensile forces according to the parallelogram of the forces in the cross member, which cancel each other out in the central position of rest. If there is a deviation from the central position, an unequal pair of forces arises, the resulting force of which, as a centering force, counteracts disturbing forces from the thrust movement directed sideways.
  • the inclined traction elements can be designed as firmly clamped leaf springs arranged transversely to the conveying direction. While the leaf springs deform slightly in the direction of thrust, in the transverse direction they form a rigid system together with the cross beams. The forces from this stiffness add up to the transverse forces from the inclined position of the tension elements, which means that the swing frame is also guided in the center. The forces for the lateral guidance are so large overall that a one-way hydraulic drive would be permissible - as described above.
  • the tension elements can be arranged in oblique, gas-tight protuberances of the lower housing.
  • the lower housing takes on an unusual shape with these protuberances.
  • the protuberances according to a further embodiment of the invention as channels for the supply of the cooling medium to the lower housing, at least some of the usual fans for the cooling medium can advantageously be set up on the furnace platform, which is usually located above the sliding grate.
  • the advantage in terms of the task is then that the tension elements are arranged in the inflow of the cooling medium. As a result, temperature influences caused by the hot bulk material and changes in length of the tension elements caused thereby can be excluded in a particularly favorable manner.
  • the working and usable space is determined by a housing, the upper housing being formed by grate plates 12 and masonry 10, while the lower housing extends between side walls with supports 11 up to the grate plates 12 .
  • the structure for movable grate beams 1 of the sliding grate comprises longitudinal beams 2 and running axles 6 with rollers 5 fastened thereon, which have wheel flanges and which represent the lateral guide.
  • Fig. 4 shows the detail IV of FIGS. 1 to 3, namely the masonry 10, a fixed side board 13 and a movable grate plate 12, which forms a thrust gap 15 and an edge gap 14 with the fixed side board 13.
  • the gaps 14, 15 are dimensioned so that they accommodate the dimensional tolerances, thermal expansion and wear paths.
  • the gap widths in this arrangement of the prior art are therefore 6 mm for the shear gap 15 and 20 mm for the edge gap 14.
  • FIG. 2 shows a sliding grate, the side members 2 of which rest on cross members 3 which are suspended from long traction elements 4.
  • the upper fastenings of the tension elements 4 are not shown.
  • the side guidance is done by friction plates 7. Additionally can be tensioned diagonally tension chains 8 between the supports 11 and the cross members 3.
  • the sliding grate of FIG. 3 designed according to the invention has tension elements 4 set at an angle ⁇ of (here) 15 degrees.
  • the angle ⁇ can vary between 3 and 45 degrees.
  • the tensile forces arising in the cross member 3 take over the function of the friction plates 7 or pull chains 8.
  • the tension elements 4 are firmly clamped leaf springs which are advantageously arranged in a package and which deform as a result of the pushing movement, both the pushing gap 15 and the edge gap 14 are independent of wear .
  • the thrust gap 15 and the edge gap 14 are, for example, only 2 mm each in this construction and maintain this quality without the influence of wearing components of the movable supporting structure.
  • the edge and shear gaps thus have the same order of magnitude as the air openings in the area of the grate plates 12 when the grate is constructed as a resistance grate according to EP-A-0 167 658.
  • Fig. 3 also shows protuberances 16 of the lower housing, in which the tension elements 4 are arranged, and the connection of these protuberances to an air supply line 17. As a result, the tension elements 4 are in the cold air flow. This also eliminates changes in length of the tension elements, which could occur due to thermal expansion at different temperatures of the masonry 10 or due to heat build-up from the lower housing.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Furnace Details (AREA)
  • Incineration Of Waste (AREA)
  • Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
  • Baking, Grill, Roasting (AREA)
  • Preparation Of Fruits And Vegetables (AREA)
  • Crushing And Grinding (AREA)
  • Beans For Foods Or Fodder (AREA)
  • Storage Of Fruits Or Vegetables (AREA)
  • Meat, Egg Or Seafood Products (AREA)
EP89123308A 1988-12-30 1989-12-16 Schubrost-Einrichtung zur Wärmebehandlung von Schüttgütern Expired - Lifetime EP0378821B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89123308T ATE88264T1 (de) 1988-12-30 1989-12-16 Schubrost-einrichtung zur waermebehandlung von schuettguetern.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3844493A DE3844493C1 (enrdf_load_stackoverflow) 1988-12-30 1988-12-30
DE3844493 1988-12-30

Publications (3)

Publication Number Publication Date
EP0378821A2 EP0378821A2 (de) 1990-07-25
EP0378821A3 EP0378821A3 (de) 1991-05-08
EP0378821B1 true EP0378821B1 (de) 1993-04-14

Family

ID=6370638

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89123308A Expired - Lifetime EP0378821B1 (de) 1988-12-30 1989-12-16 Schubrost-Einrichtung zur Wärmebehandlung von Schüttgütern

Country Status (10)

Country Link
US (1) US4966548A (enrdf_load_stackoverflow)
EP (1) EP0378821B1 (enrdf_load_stackoverflow)
JP (1) JP2707343B2 (enrdf_load_stackoverflow)
KR (1) KR0144578B1 (enrdf_load_stackoverflow)
AT (1) ATE88264T1 (enrdf_load_stackoverflow)
CS (1) CS275776B6 (enrdf_load_stackoverflow)
DD (1) DD291136A5 (enrdf_load_stackoverflow)
DE (2) DE3844493C1 (enrdf_load_stackoverflow)
DK (1) DK167329B1 (enrdf_load_stackoverflow)
ES (1) ES2039824T3 (enrdf_load_stackoverflow)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4136934C2 (de) * 1991-11-11 2001-03-29 Deutz Ag Schubrostkühler zum Abkühlen von heißem Gut
DE4320725A1 (de) * 1993-06-23 1995-01-05 Kloeckner Humboldt Deutz Ag Schubrostkühler zum Abkühlen von heißem Gut
DK171924B1 (da) * 1993-10-06 1997-08-11 Smidth & Co As F L Ristkøler
FR2748552B1 (fr) * 1996-05-13 1998-06-05 Gec Alsthom Stein Ind Grille d'incineration de dechets menagers
DE19633969A1 (de) * 1996-08-22 1998-02-26 Karl Von Wedel Schüttgutrost
US6298795B1 (en) 1997-03-13 2001-10-09 Bmh Claudius Peters Ag Mounting device for the movable part of a cooling or heating grate
DE19906262A1 (de) * 1999-02-15 2000-08-17 Krupp Polysius Ag Rostvorrichtung
DK1099923T3 (da) 1999-11-09 2003-12-15 Peters Claudius Tech Gmbh Skyderist med organer til sidestyring af den bevægelige ristdel
ES2248464T3 (es) * 2002-09-07 2006-03-16 Fisia Babcock Environment Gmbh Planta incineradora de basuras con una rejilla de combustion.
DE102007019530C5 (de) * 2007-04-25 2018-01-04 Alite Gmbh Verfahren und Einrichtung zum Kühlen einer auf einem Förderrost liegenden Schüttgutschicht
DE102008056468B3 (de) * 2008-11-04 2010-04-29 Fuguma Gmbh Maschinenbau Und Kraftwerkstechnik Rostplattenschubrost für Verbrennungsanlagen
DE102012009511B4 (de) * 2012-05-14 2013-12-19 Outotec Oyj Rostwagen zur Aufnahme von Schüttgut
CN108981404A (zh) * 2018-08-27 2018-12-11 莱芜钢铁集团有限公司 一种烧结环冷机回转框架的调圆方法

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2764403A (en) * 1954-10-21 1956-09-25 William M Duncan Pallets and grate bar therefor
GB842507A (en) * 1957-04-09 1960-07-27 Fuller Co Horizontal heat-exchange apparatus
US3358385A (en) * 1965-04-12 1967-12-19 Fuller Co Reciprocating grate conveyor with side wall damage preventing means
DE2658489C2 (de) * 1976-12-23 1983-12-22 Ludwig Riedhammer GmbH & Co KG, 8500 Nürnberg Ofen zum Sintern magnetkeramischer Werkstoffe
DE2930406A1 (de) * 1979-07-26 1981-02-12 Krupp Polysius Ag Schubrost
DE3131514C1 (de) * 1981-08-08 1988-09-08 Karl von Dipl.-Ing. Dipl.-Wirtsch.-Ing. 3057 Neustadt Wedel Verfahren zum Kuehlen von Kuehlgutbetten und Stauvorrichtung zur Durchfuehrung des Verfahrens
DE3332592C1 (de) * 1983-09-08 1985-05-15 Karl von Dipl.-Ing. Dipl.-Wirtsch.-Ing. 3057 Neustadt Wedel Aus Rostelementen zusammengesetzter Rostboden fuer Schuettgueter,wie Zementklinker

Also Published As

Publication number Publication date
DK167329B1 (da) 1993-10-11
DD291136A5 (de) 1991-06-20
EP0378821A3 (de) 1991-05-08
DK663889D0 (da) 1989-12-22
DE58904080D1 (de) 1993-05-19
CS275776B6 (en) 1992-03-18
EP0378821A2 (de) 1990-07-25
JPH02272296A (ja) 1990-11-07
JP2707343B2 (ja) 1998-01-28
DK663889A (da) 1990-07-01
DE3844493C1 (enrdf_load_stackoverflow) 1990-08-23
US4966548A (en) 1990-10-30
ES2039824T3 (es) 1993-10-01
ATE88264T1 (de) 1993-04-15
KR0144578B1 (ko) 1998-08-17
KR900010301A (ko) 1990-07-07

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