EP2010850B1 - Furnace aggregate - Google Patents

Furnace aggregate Download PDF

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Publication number
EP2010850B1
EP2010850B1 EP07721816A EP07721816A EP2010850B1 EP 2010850 B1 EP2010850 B1 EP 2010850B1 EP 07721816 A EP07721816 A EP 07721816A EP 07721816 A EP07721816 A EP 07721816A EP 2010850 B1 EP2010850 B1 EP 2010850B1
Authority
EP
European Patent Office
Prior art keywords
ceramic
furnace
sidewalls
ceramic fiber
fiber mats
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.)
Not-in-force
Application number
EP07721816A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2010850A2 (en
Inventor
Jirí Herbst
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Individual
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP2010850A2 publication Critical patent/EP2010850A2/en
Application granted granted Critical
Publication of EP2010850B1 publication Critical patent/EP2010850B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/30—Details, accessories, or equipment peculiar to furnaces of these types
    • F27B9/32—Casings
    • F27B9/34—Arrangements of linings
    • 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
    • F27D1/02—Crowns; Roofs
    • F27D1/025—Roofs supported around their periphery, e.g. arched 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
    • F27D1/00—Casings; Linings; Walls; Roofs
    • F27D1/04—Casings; Linings; Walls; Roofs characterised by the form, e.g. shape of the bricks or blocks used
    • 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
    • F27D9/00—Cooling of furnaces or of charges therein

Definitions

  • This solution deals with new construction of sidewalls and ceilings of furnace aggregates, such as continuous tunnel-type and periodic chamber-type furnaces and applications for ceramic industry, sphere of construction materials.
  • firing of construction elements such as burnt bricks, brick blocks or roof coverings has undergone rapid development from chamber furnace where the original heating medium was wood, via circular furnaces with heating medium coal to continuous tunnel furnaces with heating media coal, furnace oil or gas.
  • Common feature of these firing aggregates was unalterable construction and material used for building these applications. Sidewalls and ceilings of these firing aggregates were built of ceramic firebricks joint by refractory mortar.
  • a furnace aggregate according to claim 1 consisting of two sidewalls, ceiling formed by modules of ceramic fiber mats, input and output gates, where this furnace aggregate is in direction from the input gate divided into pre-heating, firing and cooling zones.
  • the subject matter of the new solution is that the sidewalls are in their lower parts, to the height of inserted carriage with material to be fired, formed by lines of alternately laid large-format ceramic blocks equipped vertically and horizontally with interlocking joints and with continuous openings in vertical direction. Distance between centers of these openings is L and distance of centers to the closer edge of the large-format ceramic block is U2. Above these lines of blocks is a labyrinth created from minimum one line of sidewall stones with interlocking on both sides or of interlocking plates. Above this labyrinth are again lines of alternately placed blocks with continuous openings.
  • Encasement of large-format ceramic blocks i.e. the furnace sidewalls, is in the cooling zone of the furnace equipped with horizontal inlet piping with fan and has incoming branch pipes to inner space of continuous openings in line of blocks above the labyrinth and outgoing branch pipes from continuous openings in the last, uppermost line of blocks to the horizontal outlet piping.
  • Sidewalls created as described are at their top edge equipped with fireproof reinforcement and inner side of this reinforcement is equipped with interlocking joints for mounting the ceiling onto the sidewalls.
  • Ceiling is formed by module assemblies made of ceramic fiber mats equipped on sides with interlocking joints, which are placed close next to each other and allow mutual connection.
  • a single module assembly is formed by two modules fitted together by the interlocking joints, which are made of ceramic fiber mats mounted to at least one ceramic anchor.
  • the ceramic mats are horizontally traversed by at least one spike, which passes through at least one opening formed in the body of ceramic anchor and through coaxially placed at least one puncture formed in ceramic fiber mat.
  • Anchors are led outside the ceramic fiber mats by means of a head adjusted for mounting the assembly to a welded structure from pressed profiles located above each line of ceramic fiber mats in direction of longitudinal axis of such line.
  • a head adjusted for mounting the assembly to a welded structure from pressed profiles located above each line of ceramic fiber mats in direction of longitudinal axis of such line.
  • Top surface of module assemblies is in most cases equipped with covering layer of chemically and heat resistant PVC foil, in particular in cases where protection against steam permeability must be ensured, where reducing atmosphere; overpressure in furnace are present, etc.
  • This covering layer also facilitates cleaning of the furnace aggregate ceiling.
  • the continuous openings in pre-heating and firing zones may be filled with bulk or loosened insulation material.
  • Outer encasement of sidewalls is made either by lining from facing front bricks attached to the basic support and insulation part of the sidewall by refractory anchors or by "Jekl" four-sided profiles anchored to the floor and covered by corrugated or trapeze metal sheet.
  • the ceiling module assemblies are equipped on their bottom part with a layer of protective coating.
  • the ceiling module assemblies are equipped on their bottom part with multilateral mutually interlocking cover plates made of insulation refractory material anchored in the body of module assembly.
  • Cover plates are installed in cases where composition of exhausts formed during the firing process is so aggressive that the exhausts have destructive impact on the ceiling modules, on ceramic fiber mats.
  • Profiles are advantageously formed by a pair of U-profiles oriented with their backs to each other where the space between them accommodates the anchor heads.
  • Such heads and U-profiles have coaxial openings perpendicular to the longitudinal axis of module assemblies, through which is led a ceramic stick to secure them in position.
  • the profiles of one module assembly are mutually connected by supporting beams for mechanical handling with the assembly and also the profiles of adjacent module assemblies are mutually connected by tightening bolts.
  • Fig. 1A and 1B show two views of vertically and horizontally interlocking ceramic large-format block and fig. 2A shows interlocking sidewall stone and fig. 2B shows interlocking plate.
  • Fig. 3A represents cross section through the continuous tunnel furnace and fig. 3B offers axonometric view on part of the sidewall equipped with cooling system.
  • Fig. 4 schematically outlines forming of the ceiling of the continuous tunnel furnace.
  • Fig. 5 outlines front view on module assembly of ceramic mats with anchors led between the U-profiles connected by flat cross beam, fig. 6 then shows construction of sidewalls and ceiling of continuous tunnel furnace.
  • Continuous tunnel furnace consists of two sidewalls, ceiling formed by modules made of ceramic fiber mats and finally of input and output gates. In direction from the input gate, the furnace is divided into pre-heating, firing and cooling zones.
  • fig. 3A represents cross section through such sidewall
  • fig. 3B shows axonometric view on part of the sidewall equipped with cooling system.
  • the sidewalls are in their lower parts, to the height of inserted carriage with material to be fired, formed by lines of alternately laid large-format ceramic blocks 1 equipped with vertical and horizontal interlocking joints, hereinafter referred to as the blocks 1, which have continuous openings 2 in vertical direction, as shown in fig. 1A, 1B and 3B .
  • Distance between centers of these openings 2 is L and distance of center of given continuous opening 2 to the closer edge of the block 1 is L/2.
  • one or more lines of both-sided interlocking sidewall stones 3 are created, in this case a single line, see fig. 3A , which in direction to the inside of the furnace is offset by width of insulation brick 4. In presented example this is the 4 th line from the sidewall base.
  • the purpose of this line of interlocking sidewall stones 3 is to create a labyrinth, which will decrease ambient temperature and contributes to protection of steel structure of furnace carriage. In tunnel furnaces designed for higher temperatures the labyrinth may be doubled and formed for instance by interlocking plate 31, fig. 2B . Above this line of interlocking sidewall stone 3 are again lines of alternately placed blocks 1 with continuous openings 2.
  • the outer encasement 7 is realized by lining made of decorative front bricks 16 , 115 mm wide. Outer encasement 7 is connected with the base and insulation parts of the sidewall by anchors made of fireproof steel formed for instance by wires or bands with maximum thickness 2 mm. Outer encasement 7 may also be created by other means, for instance by "Jekl" four-sided profiles anchored to the floor and the sidewall finish is then realized by covering using corrugated or trapeze metal sheet. This encasement 7, apart from creating aesthetic finish, serves also as a support for burners, cooling, fans, measuring or regulation devices.
  • Encasement 7 is in the cooling zone of the furnace, fig. 3 , equipped with horizontal inlet piping 8 with fan, which is not shown in the drawing.
  • Inlet piping 8 has incoming branch pipes 81, which are usually led perpendicular, to inner space of continuous openings 2 in line of blocks 1 placed above line of sidewall stone 3 and then it is led by outgoing branch pipes 91 from continuous openings 2 in the last, uppermost line of blocks 1 to the horizontal outlet piping 9.
  • the continuous openings 2 are filled with bulk or loosened insulation material, which increases insulation properties of mentioned parts of sidewalls of the furnace aggregate, thus eventually decreasing power consumption.
  • Binding material for individual vertical layers of sidewalls it means for ceramic blocks 1, ceramic fiber insulation 5 and insulation plates 6, designed in given example is a sealant maximum 2 mm thick, for instance ALU 1250 or other equivalent.
  • For lining made of insulation bricks 4 was used mortar supplied by manufacturer of these insulation bricks 4.
  • Basic element of the sidewall is therefore the supporting, mutually vertically and horizontally interlocking ceramic large-format block 1 .
  • Continuous openings 2 created inside the block 1 allow faster cooling of sidewalls and products located in the cooling: zone of the furnace aggregate, faster and energetically less demanding heating and firing in pre-heating and firing zones of the furnace.
  • Size of ceramic large-format blocks 1 is determined as optimum ratio between mass and speed of assembly with respect to stability of sidewalls and it can be adjusted according to specific conditions. The same applies to dimensions of vertical openings 2 and size of mutual interlocking.
  • Ceiling fig. 4
  • Ceiling is formed by module assemblies made of ceramic fiber mats 10 equipped on sides with interlocking joints, which are placed as completed units by minor mechanization on site onto assembled and reinforced ceiling.
  • Module assemblies assembled in the production plant consist of welded structures from lightweight steel profiles with anti-chemical and anti-corrosive treatment, on which the modules of ceramic fiber mats 10 are suspended by means of ceramic or steel anchors.
  • Each module assembly is formed by two parallel lines of ceramic fiber mats 10 interlocked by interlocking joints traversed by minimum one ceramic anchor 12 located at a given line in parallel with them.
  • Mutually coaxial ceramic fiber mats 10 forming the modules have in their bodies at least one puncture 11 and ceramic anchors 12 are equipped with openings 111 located coaxially with these punctures 11.
  • ceramic anchors 12 are equipped with openings 111 located coaxially with these punctures 11.
  • Given example contains three punctures 11 and openings 111, through which spikes 13 are traversed serving for connection of ceramic fiber mats 10.
  • Ceramic anchors 12 are led outside the ceramic fiber mats 10 by means of a head 14 adjusted for mounting the assembly to a welded structure from pressed profiles 15 located above each line of ceramic fiber mats 10 in direction of longitudinal axis of such line and having their ends adjusted for settling to the interlocking joints on reinforcement 20. Reinforced interlocking of sidewalls simultaneously prevents heat transmission to the outside environment.
  • profiles 15, which are formed by a pair of U-profiles oriented with their backs to each other and the space between them accommodates the heads 14 of ceramic anchors 12 .
  • Each head 14 and U-profiles have coaxial openings perpendicular to the longitudinal axis of module assemblies, through which is led a ceramic, or optionally from also anti-corrosive steel, stick 18 to secure their mutual position.
  • Top surface of module assemblies is already in the production plant equipped with covering layer 21 of chemically and heat resistant PVC foil.
  • the ceiling module assemblies are equipped on their bottom part either with a layer of protective coasting of special engobe or with multilateral mutually interlocking cover plates 17 made of insulation refractory material anchored in the body of module assembly.
  • Top parts of individual profiles 15 are mutually connected by supporting beams 19, which allow their easy handling during settling to the interlock of reinforcement 20, see fig. 5 .
  • Covering layer 21 of module assemblies is formed by PVC foil, mutually glued by plastic sealant. In case of overpressure in the furnace aggregate this solution eliminates possibility of exhausts leaking to the atmosphere and from the other side it covers and prevents the ceramic module assemblies from depositing of wastes. It allows easy regular cleaning of outer surface of the furnace aggregate ceiling using industrial vacuum cleaner without any problems.
  • the basis of new construction of the ceiling is therefore implementation of ceramic fiber mats 10 arranged in modules where these ceramic fiber mats 10 have special shape, which allows their mutual interlocking and assembly of module assemblies on a steel structure of surface treated- welded structure made of pressed sheet, for instance advantageously in a form of U-profiles.
  • This solution allows that the ceiling module assemblies, assembled already in the production plant, are placed by minor mechanization directly on site onto assembled sidewalls of the furnace aggregate.
  • Such design of the ceiling combines in one unit both refractory construction and insulation protection.
  • Supporting structure for module assemblies may serve for installation of technology for heating, cooling and regulation of furnace aggregates.
  • Fig. 6 schematically shows connection of the ceiling and sidewalls of the furnace aggregate.
  • Proposed solution of bodies of firing aggregates has greatest usability in ceramic industry, for new constructions, in the sphere of low-cost, fast and efficient repairs and reconstructions, especially for bodies of furnace aggregates designed on the basis of refractory concrete lining. It is a system of tunnel, i.e. continuous and chamber, periodic furnaces.
  • the system of the ceiling design using module assemblies manufactured in the production plant may be successfully applied also in the sphere of aggregates in metallurgy, foundry and steel industry, which predominantly exploit ceramic modules without interlocking, which are individually assembled and mounted directly into the construction of given aggregates.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)
EP07721816A 2006-04-21 2007-04-18 Furnace aggregate Not-in-force EP2010850B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CZ20060257A CZ2006257A3 (cs) 2006-04-21 2006-04-21 Pecní agregát
PCT/CZ2007/000027 WO2007121689A2 (en) 2006-04-21 2007-04-18 Furnace aggregate

Publications (2)

Publication Number Publication Date
EP2010850A2 EP2010850A2 (en) 2009-01-07
EP2010850B1 true EP2010850B1 (en) 2009-11-25

Family

ID=38220654

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07721816A Not-in-force EP2010850B1 (en) 2006-04-21 2007-04-18 Furnace aggregate

Country Status (5)

Country Link
EP (1) EP2010850B1 (cs)
AT (1) ATE449943T1 (cs)
CZ (1) CZ2006257A3 (cs)
DE (1) DE602007003464D1 (cs)
WO (1) WO2007121689A2 (cs)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102192647A (zh) * 2011-01-07 2011-09-21 顺平县普惠农丰新能源科技有限公司 一种模块拼接式隧道窑
CN106017100B (zh) * 2016-06-01 2018-08-14 湖南新天力科技有限公司 一种用于宽截面的高温炉纤维板吊顶结构

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1925953A1 (de) * 1969-05-21 1970-11-26 Werner Koschel Tunnelofen
IT1031531B (it) * 1975-02-07 1979-05-10 Studiceram Procedimento perfezionato per la costruzione di forni a tunnel a volta piani
IT1043445B (it) * 1975-10-17 1980-02-20 Studiceram Elemento prefabbricato per forni industriali di cottura
CS216120B1 (cs) * 1979-09-13 1982-10-29 Jaroslav Kolbaba stěna pec·
CS217244B1 (cs) * 1981-06-17 1982-12-31 Miroslav Berka Stropní blok pro pece
IN157358B (cs) * 1981-12-17 1986-03-08 Sauder Energy Systems Inc
CS225397B1 (cs) * 1982-06-28 1984-02-13 Miroslav Berka Konstrukce stěny průmyslové pece
DE3236187C2 (de) * 1982-09-30 1986-05-28 Didier-Werke Ag, 6200 Wiesbaden Mörtelloser Isolationswandaufbau
DE3418195A1 (de) * 1984-05-16 1985-11-21 Krupp Polysius Ag, 4720 Beckum Decken- und wandkonstruktion
ES2131429T3 (es) * 1997-03-01 1999-07-16 Schwab Feuerfesttechnik Gmbh Conjunto de clave de boveda.
DE19747320C2 (de) * 1997-10-27 2002-05-16 Didier Werke Ag Auskleidungsblöcke und dessen Verwendung

Also Published As

Publication number Publication date
CZ298145B6 (cs) 2007-07-04
CZ2006257A3 (cs) 2007-07-04
DE602007003464D1 (de) 2010-01-07
WO2007121689A2 (en) 2007-11-01
ATE449943T1 (de) 2009-12-15
WO2007121689A3 (en) 2007-12-13
EP2010850A2 (en) 2009-01-07

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