EP3833919B1 - Heber für einen drehrohrofen - Google Patents

Heber für einen drehrohrofen Download PDF

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Publication number
EP3833919B1
EP3833919B1 EP20713034.5A EP20713034A EP3833919B1 EP 3833919 B1 EP3833919 B1 EP 3833919B1 EP 20713034 A EP20713034 A EP 20713034A EP 3833919 B1 EP3833919 B1 EP 3833919B1
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EP
European Patent Office
Prior art keywords
base
head
anchor
rod
threaded
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.)
Active
Application number
EP20713034.5A
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English (en)
French (fr)
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EP3833919A1 (de
Inventor
Daniel Belmont
Philippe BERG
Xavier Chaucherie
Damien KOWALSKI
Christophe MIGUET
Eric MAIGNE
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.)
Pa Technologies
Sarp Industries SA
Original Assignee
Pa Technologies
Sarp Industries SA
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Publication date
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Priority to HRP20230658TT priority Critical patent/HRP20230658T1/hr
Publication of EP3833919A1 publication Critical patent/EP3833919A1/de
Application granted granted Critical
Publication of EP3833919B1 publication Critical patent/EP3833919B1/de
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Classifications

    • 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
    • F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
    • F27B7/14—Rotary-drum furnaces, i.e. horizontal or slightly inclined with means for agitating or moving the charge
    • F27B7/16—Rotary-drum furnaces, i.e. horizontal or slightly inclined with means for agitating or moving the charge the means being fixed relatively to the drum, e.g. composite means
    • F27B7/161—Rotary-drum furnaces, i.e. horizontal or slightly inclined with means for agitating or moving the charge the means being fixed relatively to the drum, e.g. composite means the means comprising projections jutting out from the wall
    • 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
    • F27D1/14—Supports for linings
    • F27D1/145—Assembling elements
    • F27D1/147—Assembling elements for bricks

Definitions

  • the present invention relates to a refractory material lifter for a briquetted rotary kiln.
  • a rotary kiln is conventionally made up of an outer metal cylinder, called a shell, and an inner lining.
  • the ferrule rotates around its axis and carries the internal lining with it.
  • the internal lining of the furnace plays both the role of a heat insulator protecting the shell against the high temperature of the gases and that of a wall for chemical protection of the shell.
  • the internal lining of the furnace consists of refractory bricks comprising an extrados surface, an intrados surface opposite the extrados surface and four sides connecting the extrados surface and the intrados surface.
  • Each refractory brick is placed on the shell so that its extrados surface is in contact with the shell, that its intrados surface is turned towards the center of the furnace and that its sides are in contact with the sides of the bricks adjacent (with the exception of the bricks at the ends of the oven for which one side is not in contact with another brick).
  • the refractory bricks are held together by their own taper.
  • the internal lining of certain rotary kilns can be made of refractory concrete.
  • Rotary kilns are used in various industrial fields such as cement works, lime kilns, sintering kilns, and the incineration of waste, for example hazardous waste.
  • the rotary kiln is typically slightly inclined, for example with an angle of approximately 3°.
  • the inlet to the rotary kiln is located at the top end of the kiln and includes a feed system for waste to be incinerated.
  • the slight inclination of the rotary kiln combined with the rotation of the shell allows the descent of the waste to incinerate.
  • the kiln outlet is located at the lower end of the kiln and includes a fume extractor and a residue extractor called clinker.
  • the rotary kiln is currently the only type of device allowing the simultaneous incineration of liquid, solid and/or pasty waste. Proper incineration of this waste, however, requires a sufficiently long residence time in the rotary kiln, which imposes a slow rotation speed. As a result, the mass of waste is not sufficiently stirred inside the furnace and only the upper part is in contact with the air, which limits the flow rate of treated waste and deteriorates the quality of the clinker. This concerns in particular solid and pasty waste which is the most expensive to treat.
  • rotary kilns can be further optimized, in particular by increasing the contact surface between the air and the waste in order to increase the efficiency of the kiln while maintaining, or even improving, the quality of the clinker.
  • the clinker is usually stored in a class 1 technical landfill.
  • quality of the clinker is not sufficient, in particular when the quantity of total organic compounds present in the clinker is less than 1000 ppm according to the standardized test on "leachate", or if certain inorganic compounds (such as those containing molybdenum) are present in excessive quantities, then the bottom ash must be stabilized before being stored. This stabilization step is particularly expensive.
  • the internal lining of rotary kilns includes lifters, i.e. refractory bricks overlapping other refractory bricks.
  • the lifters create an obstacle for the waste thus ensuring better mixing of said waste and increasing the penetration of air into said waste.
  • FR 2 725 505 proposes to meet this need with the help of an end piece welded to the ferrule and a clamping rod which will hold a block on the internal lining.
  • the ferrule is an expensive and critical element of the rotary kiln and the welding of the end piece weakens the ferrule which can therefore break more easily.
  • the internal coating can rotate independently of the ferrule, which generates stresses at the level of the weld, breaks the weld so that the block is no longer maintained and risks damaging the internal coating. So the solution proposed by FR 2 725 505 reduces the life of the rotary kiln.
  • JP H08 152272 consists of digging a cavity and drilling holes in the internal lining to place and maintain a block serving as a lifter.
  • digging a cavity and drilling these holes in an internal lining block generates stresses, weakens the internal lining and therefore reduces the life of the rotary kiln.
  • FR 2 298 779 proposes, meanwhile, to integrate threaded rods in a block of the internal lining and in a block serving as a lifter. These rods do not allow the blocks to be sintered because they degrade at the sintering temperature. However, sintering the blocks makes it possible to significantly increase the life of the internal coating and therefore of the rotary kiln.
  • the internal lining is formed both of refractory bricks and of base blocks of the invention, the latter serving as attachment points for the head blocks playing the role of the overlapping parts of the conventional lifters.
  • the head blocks allow churning of waste to be incinerated and wear out faster than refractory bricks.
  • the head blocks are too worn, it is then possible to replace them by dismantling them from the base blocks.
  • the present invention makes it possible to replace only the worn head blocks without changing the base blocks and without having to completely destroy the internal coating of the rotary kiln.
  • the lifter of the invention therefore advantageously makes it possible to considerably reduce the time required to replace the worn lifters of the internal lining of a rotary kiln.
  • the lifter of the invention makes it possible to replace only the worn head blocks without replacing the refractory bricks, which reduces the raw material cost of the coating of the rotary kiln.
  • the lifter of the invention facilitates maintaining the performance of the rotary kiln and the quality of the clinker over time.
  • the base anchor of the lifter attachment of the present invention is not physically linked to the shell of a rotary kiln, which advantageously makes it possible not to weaken this expensive and critical element of the rotary kiln, and therefore not to reduce the life of the rotary kiln.
  • the base block comprising the base housing of the lifter of the invention can be produced by casting followed by optional sintering, without a step of hollowing out the base housing.
  • the base block is not weakened by this step of hollowing out the base housing and it has an increased service life.
  • the base anchor comprises a cylindrical base with a polygonal base and the base housing has a shape complementary to the shape of the base anchor.
  • the base block may also have an orifice extending from the contact surface as far as the base housing and opening into the latter.
  • the orifice of the base block can pass through and the base housing can be formed on the extrados surface.
  • the head block may include a head housing to receive the head anchor.
  • the head block may also have an orifice extending from the intrados surface as far as the head housing and opening into the latter.
  • the orifice of the head block can be through and the head housing can be formed on the lower surface.
  • the base anchor may have a hole with a threaded wall, and the head anchor may include a rod whose free end is threaded.
  • the base anchor may include a rod whose free end is threaded and the head anchor may include a rod whose free end includes an orifice with a tapped wall.
  • the rod of the head anchor may have two flats opposite each other on the end opposite the free end.
  • the head anchor may further comprise a socket for the relative drive of the rod, the free end of which is threaded into the orifice with a tapped wall.
  • the grip of the head anchor can be chosen from an impression, an external drive or a multi-drive, in particular an external drive.
  • the shape of the recess of the head anchor socket can be chosen from the hollow five-lobe shape, the hollow hexagon shape, the internal six-lobe shape, the cruciform shape, the slot shape, the notch, square shape and triangular shape.
  • the shape of the outer drive of the head anchor socket can be selected from hexagonal shape, cylindrical shape and outer six-lobe shape.
  • the shape of the multi-drive of the head anchor socket can be selected from split hexagon shape, split hexagon shape, split cruciform shape and split six lobe shape.
  • the lifter may further include an intermediate tether for removably attaching the base anchor and the head anchor.
  • the intermediate attachment may comprise a head and a rod extending from the head and the free end of which is threaded
  • the base anchor may have an orifice with a tapped wall for its attachment to the end threaded free
  • the head anchor may have an annular stop to retain the head of the intermediate fastener
  • the intermediate attachment may include a head and a rod extending from the head and the free end of which has a hole with a threaded wall
  • the base anchor may include a rod the free end of which is threaded for its fixing with the orifice with a threaded wall
  • the head anchor may have an annular stop to retain the head of the intermediate fastener
  • the head of the intermediate attachment can comprise a socket for driving the intermediate attachment and fixing it with the base anchor.
  • the gripping of the head of the intermediate fastener can be chosen from a footprint, an external drive or a multi-drive, in particular an external drive.
  • the shape of the imprint of the socket of the head of the intermediate attachment can be chosen from among the shape with five hollow lobes, the shape with hollow hexagons, the shape with six internal lobes, the cruciform shape, the slot shape, notch shape, square shape and triangular shape.
  • the shape of the external drive of the intermediate clip head socket can be selected from hexagonal shape, cylindrical shape and external six-lobe shape.
  • the shape of the multi-drive of the intermediate clip head socket can be selected from split hexagon shape, split hexagon shape, split cruciform shape and split six lobe shape.
  • the head anchor can be made from a single piece of material.
  • the base anchor can be made from a single piece of material.
  • the base anchor can be made in a single piece of material with the base block.
  • the head anchor can be made in a single piece of material with the head block.
  • a rotary kiln according to comprising a lifter as described above.
  • the rotary kiln can be chosen from the rotary kiln with a refractory internal lining made of refractory bricks or refractory concrete.
  • the base block 1 comprises an extrados surface 11 , a contact surface 12 opposite the extrados surface 11 and four flanks connecting the extrados surface 11 and the contact surface 12 .
  • the extrados surface 11 and the contact surface 12 can be parallel to each other.
  • the flanks of the base block 1 are opposed in pairs and at least two opposite flanks are not mutually parallel so that the base block 1 has a taper.
  • the angle at the apex of the triangle formed by the junction of these two opposite flanks can be from 1° to 10°, in particular from 3° to 8°, very particularly from 6° to 7°.
  • the head block 2 comprises an intrados surface 21 , a contact surface 22 opposite the intrados surface 21 and four flanks connecting the intrados surface 21 and the contact surface 22 .
  • the intrados surface 21 and the contact surface 22 can be parallel to each other.
  • the flanks of the head block 2 are opposed two by two and typically at least two opposite flanks are not parallel to each other so that the angle at the apex of the triangle formed by the junction of these two opposite flanks can be from 1° to 10°, especially 3° to 8°, especially 6° to 7°.
  • the head block 2 may comprise a chamfer 25 between the lower surface 21 and at least one of the four flanks, in particular between the lower surface 21 and the two opposite flanks, more particularly the two opposite flanks which typically do not are not parallel to each other.
  • the contact surface 12 of the base block 1 is intended to be in contact with the contact surface 22 of the head block 2, they therefore have complementary three-dimensional shapes.
  • the contact surfaces 12, 22 of the two blocks 1, 2 can have the same shape and the same size.
  • the contact surfaces 12, 22 have a polygonal shape, for example a triangle shape, a square shape or a rectangle shape.
  • contact surfaces 12, 22 are flat.
  • the contact surfaces 12, 22 of the two blocks 1, 2 may have different shapes and/or different sizes.
  • the refractory material of the base block 1 and of the head block 2 can be chosen from metal alloys, ceramics or concretes.
  • the concretes prepared from refractory materials with a high alumina content and with a mullite binder or from refractory materials with a mullite-zirconia matrix are particularly suitable for the manufacture of the base 1 and head 2 blocks.
  • the concretes are fiber-reinforced with steel fibres, in particular stainless steel fibres, which may have a length of 20 to 40 mm.
  • these steel fibres, preferably of refractory stainless steel reinforce the microstructure of the concretes and thus the mechanical strength of the concretes.
  • the concretes are sintered beforehand at temperatures between 1050 and 1350°C.
  • the metal alloys which can be used are conventionally refractory stainless steels, in particular the 310S alloy.
  • the ceramics that can be used are typically concretes made from refractory materials with a high alumina content and a mullite binder or from refractory materials with a mullite-zirconia matrix.
  • the concretes are fiber-reinforced with stainless steel fibers 20 to 40 mm in length in order to reinforce the microstructure of the concretes and thus the mechanical strength of the concretes.
  • the concretes are sintered beforehand at temperatures between 1050 and 1350°C.
  • the refractory material of the base block 1 can be the same or be different from the refractory material of the head block 2 .
  • the base block 1 and the head block 2 are made of concrete, such as those described above.
  • the material of the base anchor 31 and of the head anchor 32 can be chosen from metal alloys (such as steels), ceramics, titanium, or mixtures thereof, in particular steels.
  • the stainless steels in particular the refractory stainless steels, such as AISI310S steel, are particularly suitable for the manufacture of the base anchor 31 and the head anchor 32 .
  • refractory stainless steels have the advantage of having good mechanical strength and good resistance to corrosion at high temperature.
  • the material of the base anchor 31 and that of the head anchor 32 can be the same or different.
  • the base anchor 31 can be made in several pieces of material or in one and the same piece of material, preferably in one and the same piece of material.
  • the head anchor 32 can be made in several pieces of material or in one and the same piece of material, preferably in one and the same piece of material.
  • head anchor 32 and/or the base anchor 31 in one and the same piece of material makes it possible to improve their resistance to the mechanical and thermal stresses that can be exerted on the anchor(s) in the Rotary kiln.
  • the base anchor 31 and the head anchor 32 cooperate directly to provide fixation.
  • one of the two anchors corresponds to the male component and the other anchor corresponds to the female component of a fastening system, such as the system screw nut.
  • the base anchor 31 may have an orifice 311 with a threaded wall and the head anchor 32 may comprise a rod 321 whose free end is threaded.
  • the base anchor 31 can be made in a single piece of material with the base block 1 . In which case, the orifice 311 is made in the base block 1.
  • the base block 1 comprises a base housing 13 to receive the base anchor 31 .
  • the base housing 13 has a shape complementary to the shape of the base anchor 31 .
  • the base housing 13 can be formed on the contact surface 12 of the base block 1 , in the base block 1 or on the extrados surface 11 of the base block 1 .
  • the base block 1 When the base housing 13 is formed in the base block 1 or on the extrados surface 11 , then the base block 1 further has an orifice 14 extending from the contact surface 12 to the housing base 13 and opening into it, preferably perpendicular to the contact surface 12 .
  • the base anchor 31 comprises a straight cylindrical base 312 .
  • the base 312 is a cylinder with a polygonal base such as a triangular base, a square base, a rectangular base, a hexagonal base, and an octagonal base.
  • the cylinder can have a regular polygonal base.
  • the shape of the cylinder with a polygonal base makes it possible to prevent the rotation of the base anchor 31 in the base housing 13 and therefore to facilitate its direct cooperation with the head anchor 32 to ensure fixing.
  • the base anchor 31 may further comprise a straight cylindrical post 313 extending from the base 312 , preferably from the center of the base. 312 , always preferably perpendicular to the base 312 , the section of the stud 313 being smaller than the section of the base 312 so as to form a shoulder.
  • the annular surface of the base 312 around the stud 313 forms an abutment 317 and the base housing 13 comprises a complementary abutment 131 making it possible to retain the base anchor 31 in the base housing 13 .
  • the orifice 311 can be made in the base 312 only when the stud is not provided, or in the stud 313 and possibly in the base 312 when the stud 313 is provided. It can be through or blind.
  • the threaded wall of the orifice 311 does not necessarily extend over the entire length thereof.
  • the shape of the stud 313 is not critical, as long as the orifice 311 can be formed there. However, preferably, the pad 313 has a circular cylindrical shape.
  • the head anchor 32 can be made in a single piece of material with the head block 2 .
  • the rod 321 extends from the contact surface 22 of the head block 2 , preferably perpendicular to this surface.
  • the head anchor 32 can be made separately from the head block 2 .
  • the head block 2 comprises a head housing 23 to receive the head anchor 32 .
  • the head housing 23 has a shape complementary to the shape of the head anchor 32 .
  • the head housing 23 can be formed on the intrados surface 21 of the head block 2 , in the head block 2 or on the contact surface 22 of the head block 2 .
  • the head block 2 When the head housing 23 is formed in the head block 2 or on the contact surface 22 , then the head block 2 further has an orifice 24 extending from the intrados surface 21 to the housing head 23 and opening into it, preferably perpendicular to the intrados surface 21 .
  • the threaded free end of the rod 321 has a standard screw pitch chosen from diameters from 6 mm to 36 mm, in particular from 6, 7, 8, 9, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32, 34 and 36mm.
  • the screw pitch can be specific and chosen from the round threads of the diameter indicated above and with a step of 1 to 6, in particular of 1, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5, 5.5 and 6.
  • the head anchor 32 may comprise a straight cylindrical base 322 comprising an extrados face 3221 and an intrados face 3222, the two faces being opposite one another.
  • the base 322 is a cylinder with a polygonal base such as a triangular base, a square base, a rectangular base, a hexagonal base, and an octagonal base.
  • the cylinder can have a regular polygonal base.
  • a base 322 which is a cylinder with a polygonal base that can serve as a socket for the relative driving of the threaded free end of the rod 321 into the orifice 311 of the base anchor 31 .
  • the rod 321 can extend from the extrados face 3221 of the base 322 , preferably from the center of the extrados face 3221 of the base 322 , always preferably perpendicular to this surface, the section of the stem 321 being smaller than the section of the base 322 .
  • the transition 327 between the base 322 and the rod 321 can be a shoulder, a tapered section or a fillet.
  • the extrados surface 3221 of the base 322 or the transition 327 between the base 322 and the rod 321 can form abutment against the head housing 23 .
  • the threaded free end 3211 of the rod 321 may have a smaller cross-section than the rest of the body of the rod 321 .
  • the transition 3212 between the threaded free end 3211 of the rod 321 and the rest of the body of the rod 321 can be a shoulder, a tapered section or a fillet.
  • the transition 3212 can form a second stop against the base anchor 31 or the base block 1 to indicate to the operator when to stop the rotation of the head anchor 32 and thus avoid breaking the threaded free end of the rod 321 in the hole 311 .
  • rod 321 preferably has a generally straight cylindrical shape with a circular base.
  • both the free end and the rest of the body of the rod 321 preferably have a generally straight cylindrical shape with a circular base.
  • the head anchor 32 may further comprise a socket 323 on the intrados face 3222 of the base 322 for driving the threaded free end of the rod 321 into the hole 311 of the base anchor. 31 .
  • the base anchor 31 may comprise a rod 314 whose free end is threaded and the head anchor 32 may comprise a hole 324 with a threaded wall 3241.
  • the base anchor 31 can be made in a single piece of material with the base block 1 .
  • the rod 314 extends from the contact surface 12 of the base block 1 , preferably perpendicular to the contact surface 12 .
  • the base anchor 31 can be made separately from the base block 1 .
  • the base block 1 comprises a base housing 13 to receive the base anchor 31 .
  • the base housing 13 is as described above in connection with the first variant of the first embodiment.
  • the base anchor 31 may comprise a base 312 as described above in connection with the first variant of the first embodiment.
  • the rod 314 extends from the base 312 , preferably from the center of the base 312 , preferably perpendicular to the base, the cross section of the rod 314 being smaller than the cross section of the base 312 . Thanks to the difference in section between the base 312 and the rod 314 , the base anchor 31 has a first stop around the rod 314 to come into abutment against a wall of the base housing 13 and allow the anchor to be retained. base 31 in base housing 13 . Typically, this abutment may have a frustoconical, flat annular or fillet shape.
  • the threaded free end of the rod 314 has a standard screw pitch chosen from diameters from 6 mm to 36 mm, in particular from 6, 7, 8, 9, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32, 34 and 36mm.
  • the screw pitch can be specific and chosen from the round threads of the diameter indicated above and with a step of 1 to 6, in particular of 1, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5, 5.5 and 6.
  • the head anchor 32 can be made in a single piece of material with the head block 2 . In which case, the orifice 324 is made in the head block 2.
  • the head anchor 32 can be made separately from the head block 2 .
  • the head block 2 comprises a head housing 23 to receive the head anchor 32 .
  • the head housing 23 is as described above in connection with the first variant of the first embodiment.
  • the head anchor 32 may comprise a base 322 in which the orifice 324 is made.
  • a rod 321 may extend from the base 322 , in which case the orifice 324 is made in the rod 321 from its free end and may extend into the base 322.
  • the characteristics of the base 322 , the rod 321 and the transition between the rod 321 and the base 322 can be the same as those described with reference to the first variant of the first embodiment.
  • the free end of the rod 321, in which the orifice 324 is formed may have a smaller cross section than the rest of the body of the rod 321 .
  • the transition between this free end and the rest of the body of the rod 321 can be the same as that described with reference to the first embodiment.
  • the orifice 324 can be through or blind.
  • the threaded wall 3241 of the orifice 324 does not necessarily extend over the entire length of the latter.
  • the head anchor 32 may have two flats 325 opposite to each other and positioned on the end opposite the free end of the rod 321 and in particular on the rest of the body of the rod 321 , in particular on the end opposite the free end of the rod 321 .
  • these two flats 325 constitute a safety device making it possible to separate the male component from the female component formed by the base and head anchors, despite the absence of the base 322 of the head anchor 32 due to a breakage of it.
  • the base anchor 31 and the head anchor 32 cooperate indirectly.
  • the lifter of the invention further comprises an intermediate attachment 33 for fixing the base anchor 31 and the head anchor 32 in a removable manner.
  • the base anchor 31 may have the same characteristics as in the first embodiment and will not be described again here.
  • the head anchor 32 comprises a base 322 having an opening 3223 for the passage of the intermediate attachment 33 .
  • the head anchor 32 further comprises a tubular rod 326 extending from the base 322 , preferably perpendicular to the base 322 , and adapted for the passage of the intermediate attachment 33 inside that -this.
  • the transition between the base 322 and the tubular stem 326 can be the same as that between the base 322 and the stem 321 of the first embodiment described above.
  • the free end of the tubular rod 326 has a flat washer 3261, preferably made in one and the same piece of material with the rest of the tubular rod 326, or even of the head anchor 32 .
  • the intermediate fastener 33 may include a head 331 .
  • the intermediate attachment 33 may further comprise a rod 332 extending from the head 331 , preferably perpendicular to the mean plane of the head 331.
  • the characteristics of the head 331 may be the same as those of the base 322 of the head anchor 32 of the first embodiment.
  • the intermediate fastener 33 only comprises the head 331 which can be a bolt to ensure the fixing with a threaded end of the rod 314 of the base anchor 31 .
  • the characteristics of the free end of the rod 332 of the intermediate attachment 33 can be the same as those of the free end of the rod 321 of the head anchor 32 of the first embodiment, the choice between the first or the second variant depending on the shape of the base anchor 31 chosen.
  • the transition between the head 331 and the rod 332 can be the same as that between the base 322 and the rod 321 of the head anchor 32 of the first embodiment, but preferably is a shoulder or a fillet forming an abutment for come against the flat washer 3261 at the end of the rod 321 of the head anchor 32 .
  • the size of the orifice of the flat washer 3261 is smaller than that of the head 331 of the intermediate fastener 33 .
  • the intermediate attachment 33 may further comprise a socket 333 positioned on the head 331 for driving the intermediate attachment 33 and its fixing with the base anchor 31 .
  • the grip 323, 333 is chosen from a footprint, an external drive or a multi-drive, in particular an external drive.
  • an external drive makes it possible to easily attach and detach the male component from the female component formed by the base and head anchors.
  • the shape of the external drive is selected from hexagonal shape, cylindrical shape and six outer lobe shape.
  • the shape of the indentation is chosen from the hollow five-lobe shape, the hollow hexagon shape, the internal six-lobe shape, the cruciform shape, the slot shape, the notch shape, the square shape and the triangular.
  • the shape of the shape of the multi-drive is selected from the split hexagonal shape, the split hexagon shape, the split cruciform shape and the split six lobe shape.
  • the binding may further comprise a spring washer 34 .
  • This elastic washer 34 is placed between the intermediate attachment 33 and the head anchor 32 and makes it possible to prevent the relative rotation of the intermediate attachment 33 and the head anchor 32 .
  • the invention also relates to a rotary kiln 9 comprising a lifter as described above, see Fig. 23 and 24 .
  • the rotary kiln 9 comprises a shroud 92 and an internal refractory lining.
  • the refractory internal lining comprises refractory bricks 91 or refractory concrete and a base block 1 of the lifter as described above, the base block 1 serving as a point of attachment for a head block 2 of the lifter as described above.
  • the lifters illustrated by the Fig.1 were tested on a rotary kiln for the incineration of hazardous waste in France for 6 months. Every 3 months the worn lifters are replaced in 2 days and without it being necessary to destroy the internal coating of the rotary kiln.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
  • Muffle Furnaces And Rotary Kilns (AREA)
  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
  • Manufacture, Treatment Of Glass Fibers (AREA)
  • Centrifugal Separators (AREA)
  • Lift-Guide Devices, And Elevator Ropes And Cables (AREA)

Claims (10)

  1. Heber für Drehrohröfen aus feuerfestem Material, umfassend:
    einen Basisblock (1) mit einer Außenfläche (11) und einer Kontaktfläche (12), die der Außenfläche (11) gegenüberliegt;
    einen Kopfblock (2) mit einer Innenfläche (21) und einer Kontaktfläche (22), die der Innenfläche (21) gegenüberliegt;
    eine Befestigung zum lösbaren Befestigen des Kopfblocks (2) am Basisblock (1), so dass die Kontaktflächen (12, 22) nach der Befestigung in gegenseitigem Kontakt stehen,
    wobei die Befestigung Folgendes umfasst:
    - einen Basisanker (31), und
    - einen Kopfanker (32), der direkt oder indirekt mit dem Basisanker (31) zusammenwirkt, um die Befestigung zu gewährleisten,
    wobei der Basisblock (1) ein Basisgehäuse (13) zur Aufnahme des Basisankers (31) umfasst, und
    wobei der Basisanker (31) einen zylindrischen Sockel (312) mit polygonaler Basis umfasst und das Basisgehäuse (13) eine Form aufweist, die komplementär zu der Form des Basisankers (31) ist.
  2. Heber nach Anspruch 1, wobei der Basisblock (1) ferner eine Öffnung (14) aufweist, die sich von der Kontaktfläche (12) bis zum Basisgehäuse (13) erstreckt und in dieses mündet.
  3. Heber nach Anspruch 1 oder Anspruch 2, wobei der Kopfblock (2) ein Kopfgehäuse (23) zur Aufnahme des Kopfankers (32) aufweist.
  4. Heber nach Anspruch 3, wobei der Kopfblock (2) ferner eine Öffnung (24) aufweist, die sich von der Innenfläche (21) bis zum Kopfgehäuse (23) erstreckt und in dieses mündet.
  5. Heber nach einem der Ansprüche 1 bis 4, wobei der Basisanker (31) eine Öffnung (311) mit einer Gewinde-Wand aufweist und der Kopfanker (32) eine Stange (321) umfasst, deren freies Ende ein Gewinde aufweist, oder der Basisanker (31) eine Stange (314) umfasst, deren freies Ende ein Gewinde aufweist und der Kopfanker (32) eine Öffnung (324) mit einer Gewinde-Wand (324) umfasst.
  6. Heber nach Anspruch 5, wobei die Stange (321) des Kopfankers (32) an dem dem freien Ende gegenüberliegenden Ende zwei einander gegenüberliegende Abflachungen aufweist.
  7. Heber nach Anspruch 5 oder Anspruch 6, wobei der Kopfanker (32) ferner eine Aufnahme (323) zum Mitnehmen der Stange (321, 314) aufweist, deren freies Ende mit einem Gewinde in der Öffnung (311, 324) mit einer Gewinde-Wand versehen ist.
  8. Heber nach den Ansprüchen 1 bis 4, der ferner eine Zwischenbefestigung (33) zum lösbaren Befestigen des Basisankers (31) und des Kopfankers (32) umfasst.
  9. Heber nach Anspruch 8, wobei die Zwischenbefestigung (33) einen Kopf (331) und eine Stange (332) umfasst, die sich vom Kopf (331) aus erstreckt und deren freies Ende mit einem Gewinde versehen ist, wobei der Basisanker (31) eine Öffnung (311) mit einer mit einem Gewinde versehenen Wand zur Befestigung mit dem mit einem Gewinde versehenen freien Ende aufweist, und wobei der Kopfanker (32) einen ringförmigen Anschlag aufweist, um den Kopf (331) der Zwischenbefestigung (33) zurückzuhalten; oder
    wobei die Zwischenbefestigung (33) einen Kopf (331) und eine Stange (332) umfasst, die sich von dem Kopf (331) aus erstreckt und deren freies Ende eine Öffnung mit einer Gewinde-Wand aufweist, wobei der Basisanker (31) eine Stange (314) umfasst, deren freies Ende mit einem Gewinde versehen ist, um es mit der Öffnung mit einer Gewinde-Wand zu verbinden, und der Kopfanker (32) einen ringförmigen Anschlag aufweist, um den Kopf (331) der Zwischenbefestigung (33) zurückzuhalten.
  10. Drehrohofen, umfassend einen Heber nach einem der Ansprüche 1 bis 9.
EP20713034.5A 2019-03-29 2020-03-27 Heber für einen drehrohrofen Active EP3833919B1 (de)

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FR1903423A FR3094468B1 (fr) 2019-03-29 2019-03-29 Releveur pour four rotatif
PCT/EP2020/058720 WO2020201091A1 (fr) 2019-03-29 2020-03-27 Releveur pour four rotatif

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EP3833919B1 true EP3833919B1 (de) 2023-06-07

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EP (1) EP3833919B1 (de)
CN (1) CN112969897A (de)
ES (1) ES2948859T3 (de)
FR (1) FR3094468B1 (de)
HR (1) HRP20230658T1 (de)
HU (1) HUE062296T2 (de)
PL (1) PL3833919T3 (de)
WO (1) WO2020201091A1 (de)

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Publication number Priority date Publication date Assignee Title
DK21475A (da) * 1975-01-23 1976-07-24 Dansk Leca As Roterovn til fremstilling af et opbleret lerprodukt samt fremgangsmade til fremstilling af roterovnen
FR2725505B1 (fr) * 1994-10-11 1996-11-08 Pa Technologies Four rotatif comportant des releveurs et procede de reparation de tels fours
JPH08152272A (ja) * 1994-11-28 1996-06-11 Shinagawa Refract Co Ltd ロータリキルンの掻上げ羽根補修方法
CN203810904U (zh) * 2014-04-28 2014-09-03 遵义市恒新化工有限公司 一种煅烧回转窑高温带圆台式构型的内衬结构

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HRP20230658T1 (hr) 2023-10-13
FR3094468A1 (fr) 2020-10-02
HUE062296T2 (hu) 2023-10-28
ES2948859T3 (es) 2023-09-20
PL3833919T3 (pl) 2023-09-11
WO2020201091A1 (fr) 2020-10-08
EP3833919A1 (de) 2021-06-16
CN112969897A (zh) 2021-06-15
FR3094468B1 (fr) 2022-03-11

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