EP0020260A1 - Verfahren und Vorrichtung zum Trocknen verglasbarer verdichteter Mischungen - Google Patents

Verfahren und Vorrichtung zum Trocknen verglasbarer verdichteter Mischungen Download PDF

Info

Publication number
EP0020260A1
EP0020260A1 EP80400741A EP80400741A EP0020260A1 EP 0020260 A1 EP0020260 A1 EP 0020260A1 EP 80400741 A EP80400741 A EP 80400741A EP 80400741 A EP80400741 A EP 80400741A EP 0020260 A1 EP0020260 A1 EP 0020260A1
Authority
EP
European Patent Office
Prior art keywords
column
gases
flow
gas
gas flow
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.)
Ceased
Application number
EP80400741A
Other languages
English (en)
French (fr)
Inventor
Georges Meunier
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.)
Saint Gobain Isover SA France
Original Assignee
Saint Gobain Isover SA France
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 Saint Gobain Isover SA France filed Critical Saint Gobain Isover SA France
Publication of EP0020260A1 publication Critical patent/EP0020260A1/de
Ceased legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B17/00—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement
    • F26B17/12—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed solely by gravity, i.e. the material moving through a substantially vertical drying enclosure, e.g. shaft
    • F26B17/14—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed solely by gravity, i.e. the material moving through a substantially vertical drying enclosure, e.g. shaft the materials moving through a counter-current of gas
    • F26B17/1433—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed solely by gravity, i.e. the material moving through a substantially vertical drying enclosure, e.g. shaft the materials moving through a counter-current of gas the drying enclosure, e.g. shaft, having internal members or bodies for guiding, mixing or agitating the material, e.g. imposing a zig-zag movement onto the material
    • F26B17/1441—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed solely by gravity, i.e. the material moving through a substantially vertical drying enclosure, e.g. shaft the materials moving through a counter-current of gas the drying enclosure, e.g. shaft, having internal members or bodies for guiding, mixing or agitating the material, e.g. imposing a zig-zag movement onto the material the members or bodies being stationary, e.g. fixed panels, baffles, grids, the position of which may be adjustable

Definitions

  • the present invention relates to the treatment of granular products with gases and concerns in particular the drying and hardening of products such as agglomerates, and more especially agglomerates formed from a vitrifiable composition.
  • the present invention aims to eliminate these drawbacks and proposes a compact device in which agglomerates can be dried hot with a minimum of deterioration and at the price a minimum expenditure of energy.
  • the device according to the invention is in the form of a hollow column, of low height, which the granular products to be treated pass from top to bottom, under load and by gravity.
  • This column according to a structure similar in principle to that of one of the variants of use of the device described by English patent 837,175, essentially comprises an envelope of generally cylindrical shape divided into three sections by gills which connect at least one lateral diversion equipped with suction means for taking the gases from the lower vents, means for diluting the gases sampled by additional gases, possibly from burners, and discharge means for re-injecting them at the upper vents, ensuring thus various gas flows through the column.
  • these vents open onto two peripheral sheaths or collectors.
  • These sheaths by means of which the lateral branch or branches are placed in communication with the internal space of the column, are advantageously external belts, the lower part of which has a wall inclined by 45 to 60 ° on the horizontal.
  • the column further comprises at its lower part a conical discharge hopper supplying, via a distributor, a suitable evacuation conveyor, and at its upper part a gas evacuation hood provided with a loading.
  • the latter has no airlock, but preferably it opens at an adjustable height in the column so that the height of the load stacked during treatment in the column can be modified.
  • the gas exhaust hood is advantageously connected to a chimney provided with a gas purifier and capable of creating a slight depression in the upper part of the column by natural or artificial draft, so as to prevent gases circulated in the latter are not returned to the workshop atmosphere.
  • an outside fresh air intake opening in relation to the atmosphere, possibly provided with flow adjustment means, is provided at the lower part of the column, preferably at the connection of the lower section with the discharge hopper.
  • the suction and discharge means must have sufficient dimensions to make circulate inside the column the desired gas flows and in particular suck in the flow of fresh outside air entering the bottom of the column through the intake opening to allow it to pass through the charge contained in the lower section, reach the flow of gas from the middle section and lead the resulting flow by lateral diversion, towards the dilution means, which allow for example to adjust its thermal level.
  • This flow is then re-injected into the column at the level of the upper belt where it is divided into two flows of comparable importance, the first of which rises in the upper section to escape towards the chimney, while the second is sucked back down through the middle section of the spine due to the depression prevailing at the height of the lower belt. It is then taken up by the suction means to mix with the flow coming from the lower section and be recycled in the lateral branch or branches.
  • the column is provided with an axial tube slowing, by its presence, the flow of the load in the central part of the column.
  • this tube is provided, at the height of the two peripheral belts, with conical deflectors which make it possible to maintain a substantially constant value in the cross section of the flow charge in the column, and the height The height of these deflectors can be adjusted by vertical sliding of the tube.
  • the high efficiency of the heating obtained in the upper section makes it possible to assign to the middle section intended to ensure uniformity of treatment a significant height relative to the total height of the column , while limiting it in order to avoid overwriting of the elements; in addition, the dilution of very hot gases from the burners by the gas flow taken from the lower vents and whose temperature is still relatively high makes it possible to obtain good temperature stability without the need to use an adjustment very low burner operation.
  • the compacted elements introduced into the column at room temperature and still fragile, come out of it at the bottom consolidated and practically cold, while the gases escaping at the top have also given up most of their heat. sensitive, the lower temperature limit which it is possible to impose corresponding in practice to the dew point since an important point of the treatment is to eliminate the water contained in the compacted elements.
  • the apparatus according to the invention therefore makes it possible to minimize the energy consumption all the more since, being in a very compact form, it is easy to insulate to reduce losses through the walls.
  • its compactness results in low manufacturing and operating costs, which constitutes another important advantage compared to other ovens, such as conveyor belt dryers conventionally used for the treatment of fragile products.
  • the dryer is in the form of a vertical cylindrical column comprising from top to bottom three ferrules of circular section defining an upper section 10, a central section 12 and a lower section 14, then a conical ferrule forming a discharge hopper 16, under which is installed a rotary hearth distributor 18 which feeds a lifting evacuation conveyor 20.
  • the column is capped with a hood 22 which is placed in communication by a sheath 24 with a discharge chimney not shown, conventionally provided with washing members and if necessary with a dewatering fan.
  • This hood carries a hopper 26 provided with a telescopic lower skirt 28. It is supplied by a cleat lift 30 from a compacting press, not shown.
  • the ferrules 10, 12, 14 and 16 are respectively separated by intervals defining peripheral or hearing openings 32, 34 and 36.
  • the openings 32 and 34 communicate respectively with manifolds 38 and 40 each formed by a belt having a trapezoidal section , whose lower wall defines a 45 ° cone which connects directly to the lower ferrule.
  • the opening 36 is protected by a frustoconical deflector 36a, and advantageously provided with members 36b for adjusting the air flow.
  • the column is provided with three branches arranged at 120 °.
  • Each of these branches comprises a burner 42 (FIG. 1) mounted in the axis of a dilution volute 44, itself supplied by a large capacity centrifugal fan 46.
  • the fan 46 is placed above of a cyclone 48 and installed in the axis of the outlet pipe 48a thereof.
  • the inlet pipe 48b of the cyclone 48 is connected substantially tangentially to the manifold 40 which thus serves as an extraction manifold, while the axial outlet 44a of the dilution volute 44 is connected in a similar manner to the manifold 38 which serves therefore to reinject the fumes into the column.
  • a 48c drain airlock allows the fines collected in the cyclone to be drawn off.
  • the compacted elements for example balls 50, are raised to the top of the column by the elevator 30. They are then poured into the hopper 26 from which they descend by gravity along the column; they are evacuated at its lower part by the distributor 18 which pours them onto the evacuation conveyor 20.
  • the vacuum created by the fans 46 sucks in fresh air at the intake opening 36 and incidentally at the bottom opening of the discharge hopper 16. This air crosses the lower zone of the column before entering the branches via the extraction manifold 40 (arrow f1). It then crosses the cyclones 48 (arrow f2; before being introduced into the dilution volutes 44 where it mixes with the combustion gases of the burners 42. Finally, the fumes thus obtained are reintroduced under pressure into the column by the collector of reinjection 38 (arrow f3).
  • the balls 50 which were initially at room temperature, first meet, in the upper zone of the column, an ascending current of fumes (f5) formed of diluted combustion from the burners. They thus undergo a methodical heat exchange which quickly but regularly brings their skin to the maximum temperature male drying desired, consolidating them without causing them to burst, and allows to remove most of the moisture while exhausting the heat of the fumes. They then cross the central zone 12 co-current with the recycled fraction of this smoke (f4) and are thus heated and dried to the core.
  • the treated balls are evacuated by the distributor, if necessary using a squeegee 52 disposed above the rotating hearth, towards an inclined grid 53 on which they roll away from the fines or other debris which may have form. They are then poured onto the elevator 20 which evacuates them to storage hoppers not shown, while the debris is recovered.
  • the frustoconical shape of the walls at the lower part of the gills 32, 34 and 36 facilitates the renewal of the balls belonging to the landslide slopes; it therefore prevents clogging and allows a regular passage of gases.
  • a tube 54 In the axis of the column is placed a tube 54, if necessary provided with deflectors 54a and adjustable in height using non-illustrated sliding members; this tube avoids the formation of any dead zone in the central part of the column, and the friction of the balls along its walls slows their descent in this same part, making their progression more homogeneous through the column.
  • the speed of passage of the balls in the column can be adjusted by means of the distributor 18.
  • One means consists in acting on the speed of rotation of the rotary hearth and / or on the position of the squeegee 52.
  • a minimum level detector constituting a safety and capable of stopping operation when the column is emptied due, for example, to a ball feed failure.
  • the telescopic skirt 28 placed at the lower part of the hopper makes it possible to adjust the height of the landslide slope in the upper zone 10 of the column and thus to adjust the rate of recycling of the fumes by acting on the distribution of the flow rates of the hot gas flow inside the column via the pressure drop across the upper zone.
  • Figure 6 shows operating data relating to an example of operation of a dryer according to the invention, with an internal diameter of 1.2 m and a total height of 4 m, for processing balls. consisting of a vitrifiable silico-soda-lime mixture containing about 6% humidity, at a flow rate of 6 tonnes / hour leading to an average residence time of 30 to 40 minutes.
  • the drier makes it possible to process the balls or other agglomerates in a homogeneous, continuous and rapid manner, without however subjecting them to thermal shocks which would be very unfavorable to their mechanical strength, and this despite the absence of any complicated regulation of the burners.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Drying Of Solid Materials (AREA)
EP80400741A 1979-05-28 1980-05-28 Verfahren und Vorrichtung zum Trocknen verglasbarer verdichteter Mischungen Ceased EP0020260A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7913500 1979-05-28
FR7913500A FR2458038A1 (fr) 1979-05-28 1979-05-28 Sechoir pour melange vitrifiable compacte

Publications (1)

Publication Number Publication Date
EP0020260A1 true EP0020260A1 (de) 1980-12-10

Family

ID=9225918

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80400741A Ceased EP0020260A1 (de) 1979-05-28 1980-05-28 Verfahren und Vorrichtung zum Trocknen verglasbarer verdichteter Mischungen

Country Status (6)

Country Link
US (1) US4351119A (de)
EP (1) EP0020260A1 (de)
JP (1) JPS5625679A (de)
BR (1) BR8003290A (de)
ES (1) ES491882A0 (de)
FR (1) FR2458038A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2567636A1 (fr) * 1984-07-10 1986-01-17 Satig Ets Cesbron Cie Sechoir pour matieres en grains

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3050646C2 (de) * 1980-11-28 1986-02-13 Chimiko-metallurgičeskij institut Akademii Nauk Kazachskoj SSR, Karaganda Schachtofen zur Wärmebehandlung von feindispersem Gut
JPS6055755B2 (ja) * 1981-11-05 1985-12-06 宇部興産株式会社 二重傾斜炉
US4747773A (en) * 1986-03-21 1988-05-31 Predescu Lucian A Shaft kiln utilized for lime production
US4668184A (en) * 1986-07-08 1987-05-26 Fuller Company Annular shaft kiln
US6217767B1 (en) * 1992-02-03 2001-04-17 Clark Environmental Services Vacuum sparging process for treating contaminated groundwater and/or wastewater
US5423676A (en) * 1992-03-30 1995-06-13 Osaka Gas Co., Ltd. Waste melting furnace
US10539366B2 (en) * 2014-04-30 2020-01-21 Stephen B. Maguire Method and apparatus for vacuum drying granular resin material
CA2658228A1 (en) * 2006-07-28 2008-01-31 Steve D. Shivvers Counter flow cooling drier with integrated heat recovery
US20080178488A1 (en) * 2007-01-26 2008-07-31 Shivvers Steve D Portable counter flow drying and highly efficient grain drier with integrated heat recovery
US20080209755A1 (en) * 2007-01-26 2008-09-04 Shivvers Steve D Counter flow cooling drier with integrated heat recovery with fluid recirculation system
US20080209759A1 (en) * 2007-01-26 2008-09-04 Shivvers Steve D Counter flow air cooling drier with fluid heating and integrated heat recovery
US20080184589A1 (en) * 2007-02-02 2008-08-07 The Shivvers Group, Inc., An Iowa Corporation High efficiency drier with heating and drying zones
WO2010062359A1 (en) * 2008-10-31 2010-06-03 Shivvers Steve D High efficiency drier
WO2012124037A1 (ja) * 2011-03-14 2012-09-20 特定非営利活動法人プロサップ 骨材加熱装置及び骨材加熱方法
RU2601778C2 (ru) * 2014-12-01 2016-11-10 Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования Костромская Государственная Сельскохозяйственная Академия Бункерное устройство для сушки и активного вентилирования сыпучих материалов
US11364657B2 (en) 2018-04-04 2022-06-21 Novatec, Inc. Reducing moisture in granular resin material using inert gas
US20190308344A1 (en) 2018-04-04 2019-10-10 Novatec, Inc. Method and apparatus for polymer drying using inert gas

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE453678A (de) *
DE566331C (de) * 1931-02-27 1932-12-16 Arno Andreas Trockenvorrichtung fuer Schuettgut aller Art
GB647490A (en) * 1945-07-19 1950-12-13 Erie Mining Co Heat-treating solids
DE934159C (de) * 1951-10-13 1955-10-13 Buettner Werke Ag Verfahren und Einrichtung zum Trocknen, insbesondere von Getreide, Reis oder anderen koernigen Produkten
GB837175A (en) * 1957-12-09 1960-06-09 Carves Simon Ltd Apparatus for treating bulk material with hot gases
US3371429A (en) * 1966-05-09 1968-03-05 Miller Equipment Company Material processing tower
DE1508507B1 (de) * 1966-02-23 1970-01-02 Polysius Ag, 4723 Neubeckum Vorrichtung zum direkten Wärmeauetausch zwischen einem körnigen oder staubförmigen Gut und einem Gas
FR2183074A1 (de) * 1972-05-01 1973-12-14 Fischer Ag Georg
FR2284845A1 (fr) * 1974-09-14 1976-04-09 Engelbrecht & Lemmerbrock Installation de sechage de cereales humides
GB1508638A (en) * 1976-11-26 1978-04-26 Simplex Cambridge Apparatus for drying particulate or granular material

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB587890A (en) 1942-12-22 1947-05-08 Claes Wilhelm Pilo Improvements in or relating to the continuous drying of material in solid form and to the half-carbonizing or carbonizing of peat and other carbonaceous piece material
US2676095A (en) * 1948-01-14 1954-04-20 Erie Mining Co Indurating furnace and process
US2670946A (en) * 1950-10-31 1954-03-02 Pickands Mather & Co Apparatus for magnetic roasting

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE453678A (de) *
DE566331C (de) * 1931-02-27 1932-12-16 Arno Andreas Trockenvorrichtung fuer Schuettgut aller Art
GB647490A (en) * 1945-07-19 1950-12-13 Erie Mining Co Heat-treating solids
DE934159C (de) * 1951-10-13 1955-10-13 Buettner Werke Ag Verfahren und Einrichtung zum Trocknen, insbesondere von Getreide, Reis oder anderen koernigen Produkten
GB837175A (en) * 1957-12-09 1960-06-09 Carves Simon Ltd Apparatus for treating bulk material with hot gases
DE1508507B1 (de) * 1966-02-23 1970-01-02 Polysius Ag, 4723 Neubeckum Vorrichtung zum direkten Wärmeauetausch zwischen einem körnigen oder staubförmigen Gut und einem Gas
US3371429A (en) * 1966-05-09 1968-03-05 Miller Equipment Company Material processing tower
FR2183074A1 (de) * 1972-05-01 1973-12-14 Fischer Ag Georg
FR2284845A1 (fr) * 1974-09-14 1976-04-09 Engelbrecht & Lemmerbrock Installation de sechage de cereales humides
GB1508638A (en) * 1976-11-26 1978-04-26 Simplex Cambridge Apparatus for drying particulate or granular material

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2567636A1 (fr) * 1984-07-10 1986-01-17 Satig Ets Cesbron Cie Sechoir pour matieres en grains

Also Published As

Publication number Publication date
ES8100789A1 (es) 1980-12-16
FR2458038B1 (de) 1982-04-16
JPS5625679A (en) 1981-03-12
BR8003290A (pt) 1980-12-30
FR2458038A1 (fr) 1980-12-26
ES491882A0 (es) 1980-12-16
US4351119A (en) 1982-09-28

Similar Documents

Publication Publication Date Title
EP0020260A1 (de) Verfahren und Vorrichtung zum Trocknen verglasbarer verdichteter Mischungen
EP3311088B1 (de) Gehäuse für aushärtungsofen und aushärtungsofen zur vernetzung einer kontinuierlichen matte aus anorganischen oder pflanzlichen fasern
EP0223807B1 (de) Verfahren zum erzeugen von geröstetem holz, auf diese weise hergestelltes produkt und dessen verwendung zum erzeugen von energie
EP1485329B1 (de) Vorrichtung zum trocknen und/oder brennen von gips
FR2574810A1 (fr) Reacteur a soles multiples et procede de traitement thermique de matieres carbonees
CA1234974A (fr) Procede de cuisson-deshydratation et de sterilisation-dessiccation de dechets organiques, et dispositif pour la mise en oeuvre de ce procede
FR2669553A1 (fr) Procede pour separer les particules de bentonite et de supports carbones de la poussiere obtenue par regeneration mecanique du sable usage.
FR2606786A1 (fr) Dispositif a soles multiples et procede de traitement thermique de matieres carbonees
EP0772663A1 (de) Verfahren und vorrichtung zum recyclen von behandeltes holz
EP0345336A1 (de) Verfahren und vorrichtung zur bertinisierung von holzartigen pflanzlichen materialien
FR2581981A1 (fr) Appareil et procede de regeneration de charbon actif
EP0051008B2 (de) Verfahren zum trägen verzögerten, ununterbrochenen Kühlen vonGetreide
EP0125973B1 (de) Vorrichtung zur thermischen Behandlung von Mineralien in pulveriger Form
FR2569471A1 (fr) Sechoir a cereales
EP0491611A1 (de) Verfahren zur Behandlung von Kieselsäurestäuben mit Berücksichtigung ihrer Weisskraft und Apparat zur Durchführung des Verfahrens
EP1818636B1 (de) Vorrichtung und Verfahren zum Trocknen von Granulat auf der Basis von Pulver und Bindemittel
EP0094893B1 (de) Verfahren und Vorrichtung zur Behandlung eines festen kleinstückigen Materials
EP0009455B1 (de) Vorrichtung zum Wärmeaustausch zwischen festen Teilchen und einem Gasstrom
FR2563327A1 (fr) Installation de sechage de produits par echange de chaleur avec un fluide de sechage
WO1991003526A1 (fr) Dispositif et procede de fabrication de charbon de bois
EP0033284A1 (de) Verfahren und Vorrichtung zur Aufbereitung einer Erzmischung in einer Sinteranlage
CN212319743U (zh) 一种具有高效干燥装置污泥燃烧炉
FR2710399A1 (fr) Procédés pour la combustion en continu de bois fragmenté et application à un calorifère.
FR2539496A1 (fr) Installation pour le traitement, notamment thermique, de produits ou matieres pulverulents, en grains, ou en morceaux de faible granulometrie
EP4413312A1 (de) Vorrichtung zur kontinuierlichen trocknung von partikeln mit einem system zur trennung und rückführung feiner partikelfraktionen

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): AT BE CH DE GB IT LU NL SE

17P Request for examination filed

Effective date: 19810518

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN REFUSED

18R Application refused

Effective date: 19840201

RIN1 Information on inventor provided before grant (corrected)

Inventor name: MEUNIER, GEORGES