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WO1999001389A1 - Procede et dispositif de prechauffage et/ou de sechage de la charge pour fours de verrerie - Google Patents

Procede et dispositif de prechauffage et/ou de sechage de la charge pour fours de verrerie Download PDF

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Publication number
WO1999001389A1
WO1999001389A1 PCT/EP1998/004093 EP9804093W WO9901389A1 WO 1999001389 A1 WO1999001389 A1 WO 1999001389A1 EP 9804093 W EP9804093 W EP 9804093W WO 9901389 A1 WO9901389 A1 WO 9901389A1
Authority
WO
WIPO (PCT)
Prior art keywords
shaft
exhaust gases
furnace
radial
furnace exhaust
Prior art date
Application number
PCT/EP1998/004093
Other languages
German (de)
English (en)
Inventor
Helmut Pieper
Original Assignee
Beteiligungen Sorg Gmbh & Co. Kg
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 Beteiligungen Sorg Gmbh & Co. Kg filed Critical Beteiligungen Sorg Gmbh & Co. Kg
Priority to AU88057/98A priority Critical patent/AU8805798A/en
Publication of WO1999001389A1 publication Critical patent/WO1999001389A1/fr

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B3/00—Charging the melting furnaces
    • C03B3/02—Charging the melting furnaces combined with preheating, premelting or pretreating the glass-making ingredients, pellets or cullet
    • C03B3/023—Preheating
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P40/00—Technologies relating to the processing of minerals
    • Y02P40/50—Glass production, e.g. reusing waste heat during processing or shaping

Definitions

  • the invention relates to a method for preheating and / or drying glass-forming loading material for glass melting furnaces using furnace exhaust gases from the glass melting furnace as heating gases, by means of which the loading material is heated with a jacket in a treatment chamber, the loading material being vibrated around a concentric shaft is transported around on at least one conveyor path closed on the underside and is heated directly from above by the furnace exhaust gases and indirectly from below by heating the at least one conveyor path, and the exhaust gases while heating the feed material to temperatures between 200 ° C. and just below below a temperature at which the load has a tendency to stick, are passed through the treatment chamber.
  • the material to be treated contains finely divided components, such as feed material for glass melting furnaces, which consists of fragments and batches, but also a high level of dust formation if large amounts of gas are passed through per unit of the cross-sectional area need to ensure a sufficiently large heat input.
  • the gas quantities and temperatures are not specified by the material to be treated, but rather by external units, such as glass melting furnaces with or without regenerators, recuperators and / or gas coolers (quenchers).
  • the feed for glass melting furnaces must be preheated to temperatures between 400 ° C and 500 ° C if sufficient recovery of waste heat from the glass melting furnaces and rapid melting in the furnace itself are to be guaranteed.
  • a shaft supporting the coil has a central heating device and a heat exchanger with fins, through which drying air is indirectly heated. This is first drawn from top to bottom in a first annulus over the fins of the heat exchanger by suction and then in the opposite direction through a second annulus from which the hot drying air enters from above into a third annulus in which - at intervals from a boiler jacket surrounded - the helix is located.
  • a fifth annular space mechanically decouples the oscillating shaft with the helix and the fourth annular space from the non-oscillating heating device with the first, second and third annular space. The total direction of all dry air flows is therefore not rectified, but alternating up and down, i.e. opposite.
  • the invention is therefore based on the object of specifying a method and a device with which not only homogeneous but also inhomogeneous feed material for glass melting furnaces with a wide range of grain sizes with the smallest possible dust generation and segregation using large quantities of gas, it can be preheated and / or dried homogeneously to high temperatures in a short time. Temperatures in the range between 400 ° C and 500 ° C are particularly suitable for this.
  • the object is achieved in the method specified at the outset according to the invention in that the furnace exhaust gases are divided into a plurality of radial partial flows through the at least one conveying path and passed through openings in the concentric shaft, and in that the radial partial flows are combined again to form a total flow, the vertical Directional components of all flows are rectified.
  • the object is achieved by the invention, also inhomogeneous loading material with a wide range of grain sizes (batch with broken glass) smallest possible dust generation and segregation using large amounts of gas to preheat homogeneously to high temperatures up to 500 ° C and possibly above.
  • the invention solves diametrically opposed requirements, namely, the utilization of exhaust gas quantities in relation to the quantities of the feed material, both of which are predefined within very narrow limits by the operating parameters of the glass melting furnace with regard to the glass quality.
  • Vapors from glass formers, which are unavoidable at the high furnace temperatures, and particles in the furnace exhaust gases are condensed or collected by the feed material and returned to the furnace, thereby counteracting depletion of the melt by certain substances.
  • This also and especially applies in the event that the glass melting furnace is operated with oxidation gases whose oxygen content is enriched, or with technically pure oxygen. Although this reduces the amount of exhaust gas per unit of time, it increases its temperature.
  • the invention extends.
  • the hot furnace exhaust gases are distributed very largely uniformly over the total volume of the treatment chamber, the mean flow rate being reduced at the same time.
  • the furnace exhaust gas is divided between the individual levels or windings of the conveying path into parallel partial flows, whereby the flow speed is reduced again.
  • the material to be loaded is heated directly from above by the furnace exhaust gas, indirectly from below by heat emission to the closed floor or the floors of the transport ways. In summary, it is an axial heat exchanger with superimposed cross flows.
  • the total amount of furnace exhaust gases is discharged from a distribution space located below the at least one conveying path after passing through the radial partial flow paths in the region of the upper end or the upper ends of the at least one conveying path.
  • the conveying paths are divided into at least two groups and surrounded in groups by at least one annular gap each, and the radial Partial flows are led radially inward in the lowest group and radially outward in the uppermost group, with the furnace exhaust gases finally being extracted from the upper annular gap.
  • the invention also relates to a device for preheating and / or drying glass-forming feed material for glass melting furnaces with a feed line for supplying furnace exhaust gases from the glass melting furnace as heating gases
  • a treatment chamber which is closed except for openings for the supply and discharge of the feed material and the furnace exhaust gases and has a jacket
  • such a device according to the invention is characterized in that for guiding the furnace exhaust gases
  • a space is arranged below the at least one conveyor path, with which a plurality of parallel radial flow paths for the furnace exhaust gases are connected via at least one annular gap between a jacket of the treatment chamber and the at least one conveyor path for the material to be loaded, and d) the concentric shaft is provided with openings through which the furnace gases can be passed.
  • the conveying paths are subdivided into at least two groups and surrounded in groups by at least one annular gap each, and the groups and the annular gaps are subdivided by at least one separating device projecting inwards from the jacket, in such a way that radial partial flows of the furnace exhaust gases in the lowest group radially inwards and inwards the uppermost group can be passed radially outwards through the conveying paths, and the uppermost annular gap is connected to a suction line for the furnace exhaust gases.
  • the separating device has a radially inward slope and projects with its inner edge between the uppermost conveying path of the lowest group and the lowest conveying path of the uppermost group to form a flow restriction.
  • the inner edge of the separating device forms the flow restriction with the load on the uppermost conveying path of the lowest group.
  • the conveying paths consist of horizontal, circular vibrating plates, each with a passage opening for the material to be loaded, and of fall paths between each passage opening and the vibrating plate located below it.
  • a continuous conveyor path consists of a trough-shaped helix.
  • the radial width of the conveying paths is between 0.5 times and 2.0 times the diameter of the shaft.
  • the vibrating plates are each provided with an apron for guiding the feed material in the area of the passage openings for the feed material in the direction of the respective vibrating plate below.
  • the shaft with the at least one conveying path is arranged standing on the vibration drive.
  • the shaft with the at least one conveying path is arranged in a hanging manner on the vibration drive.
  • a stiffening tube is arranged at a radial distance inside the shaft.
  • the stiffening tube is connected to the shaft at least at axial intervals.
  • the stiffening tube is connected to the shaft by radial, vertically continuous webs, and sector-shaped partial channels are formed between the webs. *
  • the treatment chamber is located above a charging silo for the glass melting furnace.
  • the space for the supply or removal of the furnace exhaust gases is at least partially arranged inside the charging silo.
  • FIG. 1 shows a vertical axial section along the line I-1 in FIG. 3 through a first exemplary embodiment of a complete device with annular conveying paths
  • FIG. 2 shows the left half of FIG. 1 on an enlarged scale with flow arrows drawn for the furnace exhaust gas
  • FIG. 3 shows a horizontal section through the object of FIG. 1 along the line III-III
  • FIG. 4 shows a vertical section through a second exemplary embodiment of a complete device with a helical conveyor path
  • FIG. 5 shows a simplified flow diagram for the guidance of the furnace exhaust gases
  • Figure 6 shows a third embodiment in the form of a variant of the example according to FIGS. 1 and 2, in which the conveying paths are divided into two groups and are suspended from a vibratory drive,
  • FIG. 7 shows a fourth exemplary embodiment in the form of a variant of the example according to FIG. 4, in which a helical conveying path is attached to a vibratory drive and in which the load is conveyed from bottom to top, and
  • FIG. 8 shows a horizontal section through the subject of FIG. 6.
  • FIG. 1 shows a chamber floor 1, the underside of which rests on two vibratory drives 2 which are supported on frames 4 by spring assemblies 3.
  • a vertical, cylindrical shaft 5 projects upwards, the inner cross-section of which is not blocked and which, on its circumference, has five circular conveying paths 6 in the form of oscillating plates 6a with a trough-shaped cross-section for receiving and transporting the material to be loaded.
  • radial gaps 7 there are openings 8 in the shaft wall 5a for the passage of the furnace gases into the shaft 5.
  • the arrangement is rotationally symmetrical to an axis AA.
  • annular distributor space 9 which is only interrupted by a narrow, rectangular discharge shaft 10 for the heated feed material, the longest cross-sectional axis of which runs radially to the axis AA and which is connected to the lowest vibrating plate 6a, which has a slot-shaped passage opening 25 for the load at this point (FIG. 3).
  • the stack of vibrating plates 6a is accommodated in a gas-tight treatment chamber 11 which, in addition to the chamber floor 1, has a chamber ceiling 12 and a cylindrical jacket 13 which is suspended from supports 14.
  • a feed line 15 for the furnace exhaust gas opens into the jacket 13 or into the distributor space 9, which leads at the transition point into the jacket 13 into an angle piece 16 with a rectangular cross section and the height "H".
  • the distributor space 9 - apart from the discharge shaft 10 - fills the entire lower cross section of the treatment chamber 11.
  • Vapors, vapors or vapors released from the feed material are drawn off through the openings 8 with the furnace exhaust gas, as is shown within the shaft 5 in FIG. 2, right.
  • the chamber floor 1 is connected to the stationary jacket 13 in a gas-tight manner by means of an annular compensator 18, the shaft 5 to the stationary chamber ceiling 12 via a further annular compensator 19.
  • the shaft 5 settles beyond its outlet opening 5b above the compensator 19 by means of a discharge line 20 large cross section.
  • Through the chamber ceiling 12 extends into the trough-shaped cross-section of the top vibrating plate 6a into a rectangular chute 21 for the load, the longest cross-sectional axis also extends radially to the axis AA.
  • the lower edge of the chute 21 acts to a certain extent as a distributor for the load on the top vibrating plate 6a.
  • a metering device 22 sits on the chute 21, which can be designed as a cellular wheel sluice, but this is only shown in broken lines.
  • FIG. 2 also shows sections of thermal insulation 24, which covers the entire treatment chamber 11.
  • FIG. 3 also shows the manner in which the feed line 15 for the furnace exhaust gas passes into the jacket 13 by means of the angle piece 16.
  • the angle piece 16 extends over a circumferential angle " ⁇ ", which in the present case is 90 °, but can also be chosen to be larger if, for example, a ring line is used.
  • FIG. 3 also shows a radially extending, slot-shaped passage opening 25 for the load, below which an apron 26 is fastened to the vibrating plate 6a, which surrounds the drop path of the load to reduce the development of dust, similar to how this was carried out in the drop shaft 21 .
  • FIG. 4 shows the replacement of the oscillating plates 6a by a helix 27a which is trough-shaped in cross section and defines a helical conveying path 27. kidney.
  • a helix 27a which is trough-shaped in cross section and defines a helical conveying path 27. kidney.
  • the circumferential edges of the helix 27a lying behind the vertical section plane are shown only partially and in a straight line; the circumferential edges of the helix 27a lying in front of the cutting plane are shown in dashed lines.
  • the center points of the openings 8 in the shaft wall 5a are of course on a helix line with the same pitch, which is steeper due to the smaller diameter of the inner edge of the helix. Otherwise, the functionality is completely analog.
  • the fall paths lying between the oscillating plates 6a result in a quasi-helical conveying path;
  • the embodiment according to FIG. 4 is a real helical conveying path.
  • Figure 5 shows a simplified flow diagram for the guidance of the furnace exhaust gases. No flow directions are given, i.e. the flow directions can be reversed both overall and in sections, which e.g. will be explained in more detail with reference to Figure 6.
  • the decisive factor is that sufficiently parallel and sufficiently long radial flow paths (dimension “ ⁇ r”) are available either directly and / or indirectly for the heat exchange between the furnace exhaust gases and the feed material.
  • the conveying paths 6 are suspended from a vibration drive 2 and divided into two groups G1 and G2 and surrounded in groups by an annular gap 17a, 17b.
  • the groups G1 and G2 and the annular gaps 17a and 17b are divided by a separating device 17c projecting inwards from the casing 13, in such a way that the radial partial flows of the furnace exhaust gases radially inwards in the lowest group G1 and radially outwards in the uppermost group G2 the conveying paths 6 are passed through, as indicated by arrows.
  • the uppermost annular gap 17b is connected to a suction line 17d for the furnace exhaust gases.
  • the separating device 17c is funnel-shaped, has a radially inward slope and projects with its inner edge 17e between the uppermost conveying path 6 of the lowermost group G1 and the lowermost conveying path 6 of the uppermost group G2 to form a flow constriction 17f.
  • the conveying paths 6 consist of horizontal, circular vibrating plates, each with a passage opening for the material to be loaded, and of fall paths between each passage opening and the vibrating plate located below it, as has already been described in connection with FIGS. 1 to 3.
  • FIG. 7 is a variant of the example according to FIG. 4, in which in turn a helical conveying path 27 is attached to a vibratory drive 2 and in which the load is conveyed from bottom to top this time.
  • the one continuous conveying path 27 consists of a helix with a trough-shaped cross section.
  • the feed takes place at the lower end of the helix - preferably as shown - by a screw conveyor 33 from a storage silo 34, which is only indicated.
  • the helix is emptied at the upper end of the helix through a pipe socket 35 into a stiffening tube 31, which is inside the shaft 5 radial distance is arranged.
  • the cylinder gap 36 thus formed serves to guide the furnace exhaust gases.
  • the stiffening tube 31 is connected to the shaft 5 at least at axial intervals, which was done in FIG. 6 at the lower end by an inner floor 37, in FIG. 7 at the lower end by an annular plate 38 and at the upper end by star-shaped traverses 39.
  • FIG. 7 shows no flow arrows for the furnace exhaust gases. These can be guided both from the annular space 9, which is then a distribution space, and through the openings 8 of the shaft 5 and through the line 20, which is then a discharge line, arranged between two vibratory drives 2 (only the front one of which is shown) are, so summarily upwards, as well as in the opposite direction, namely summarily downwards.
  • the line 20 is a supply line, and the exhaust gas flow runs through the openings 8 of the shaft 5 to the annular space 9, which is then a collecting space.
  • the stiffening can, however, preferably take place according to FIG. 8 in that the stiffening tube 31 is connected to the shaft 5 by radial, vertically continuous webs 40, sector-shaped partial channels 41 being formed between the webs 40.
  • any asymmetries in the flows can also be compensated for, if necessary by accommodating preferably adjustable throttle bodies in the individual subchannels.
  • FIGS. 6 and 7 additionally show that the treatment chamber 11 is arranged above a charging silo 32 and that the space 9 is arranged inside the charging silo 32.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Drying Of Solid Materials (AREA)
  • Furnace Details (AREA)

Abstract

Lors du préchauffage et/ou séchage de la charge pour fours de verrerie, les gaz de carneau sont utilisés comme gaz de chauffage. La charge est chauffée dans une chambre de traitement (11) avec un manteau (13), transportée par un mouvement vibratoire autour d'un puits concentrique (5) sur au moins un trajet d'acheminement (6), chauffée par dessus directement par les gaz de carneau et par dessous indirectement par chauffage du trajet d'acheminement (6) qui est porté à une température comprise entre 200 °C et un niveau juste en dessous du seuil thermique auquel la charge a tendance à s'agglutiner. Pour résoudre ce problème, on préchauffe de manière homogène, à une température pouvant atteindre 500 °C, une charge inhomogène à large spectre granulométrique, en produisant le moins de poussière possible et en évitant le plus possible la désagrégation grâce à de grandes quantités de gaz, les gaz de carneau étant répartis par au moins un trajet d'acheminement (6) en plusieurs courants radiaux et introduits par des ouvertures (8) dans le puits (5) concentrique. Les courants radiaux sont à nouveau regroupés en un seul flux, les composantes verticales de tous les courants étant orientées dans la même direction.
PCT/EP1998/004093 1997-07-03 1998-07-02 Procede et dispositif de prechauffage et/ou de sechage de la charge pour fours de verrerie WO1999001389A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU88057/98A AU8805798A (en) 1997-07-03 1998-07-02 Method and device for preheating and/or drying a glass furnace charge

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19728332A DE19728332C2 (de) 1997-07-03 1997-07-03 Verfahren und Vorrichtung zum Vorwärmen und/oder Trocknen von glasbildendem Beschickungsgut mittels Abgasen von Glasschmelzöfen
DE19728332.2 1997-07-03

Publications (1)

Publication Number Publication Date
WO1999001389A1 true WO1999001389A1 (fr) 1999-01-14

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Family Applications (1)

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PCT/EP1998/004093 WO1999001389A1 (fr) 1997-07-03 1998-07-02 Procede et dispositif de prechauffage et/ou de sechage de la charge pour fours de verrerie

Country Status (3)

Country Link
AU (1) AU8805798A (fr)
DE (1) DE19728332C2 (fr)
WO (1) WO1999001389A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110088278A1 (en) * 2009-10-21 2011-04-21 Stmicroelectronics, Inc. Dryness detection method for clothes dryer based on pulse width
CN101988792B (zh) * 2009-07-31 2012-01-04 上海申德机械有限公司 立式圆筒烘干机
CN107187890A (zh) * 2017-05-25 2017-09-22 重钢西昌矿业有限公司 矿浆分流装置

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009056502A1 (de) * 2009-12-02 2011-06-09 Haver & Boecker Ohg Trocknungseinrichtung zur Partikelbestimmung
DE102010025365B3 (de) 2010-06-28 2011-06-16 Beteiligungen Sorg Gmbh & Co. Kg Vorrichtung zum Trocknen und Vorwärmen von partikelförmigem Beschickungsgut
CN104230144A (zh) * 2014-09-20 2014-12-24 闻喜县宏业玻璃制品有限公司 玻璃工业窑炉全密闭热量循环节能环保型加料系统
RU2720042C1 (ru) * 2019-12-11 2020-04-23 федеральное государственное бюджетное образовательное учреждение высшего образования "Белгородский государственный технологический университет им. В.Г. Шухова" Способ получения стекольной шихты

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2597585A (en) * 1949-07-01 1952-05-20 George E Howard Glass melting method and apparatus
DE3116755A1 (de) * 1981-04-28 1982-11-11 Gerresheimer Glas AG, 4000 Düsseldorf "verfahren und vorrichtung zum vorerhitzen von glasscherben und glasgemenge vor dem einlegen in die glasschmelzwanne"

Family Cites Families (4)

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Publication number Priority date Publication date Assignee Title
US3084450A (en) * 1959-05-29 1963-04-09 Hansen Friedrich Continuous drying apparatus including a vibrating helical conveyor
DD141017A1 (de) * 1978-08-17 1980-04-09 Nikolaus Koschwitz Verfahren und vorrichtung zum erwaermen glasbildender ausgangsmaterialien
DE8808579U1 (de) * 1988-07-05 1988-11-10 Uhde Gmbh, 4600 Dortmund Vorrichtung zum Aufbereiten - insbesondere zum Trocknen - von Schüttgut
DE4119607A1 (de) * 1991-06-14 1992-12-17 Uhde Gmbh Verfahren und vorrichtung zur behandlung von schuettgut

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2597585A (en) * 1949-07-01 1952-05-20 George E Howard Glass melting method and apparatus
DE3116755A1 (de) * 1981-04-28 1982-11-11 Gerresheimer Glas AG, 4000 Düsseldorf "verfahren und vorrichtung zum vorerhitzen von glasscherben und glasgemenge vor dem einlegen in die glasschmelzwanne"

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101988792B (zh) * 2009-07-31 2012-01-04 上海申德机械有限公司 立式圆筒烘干机
US20110088278A1 (en) * 2009-10-21 2011-04-21 Stmicroelectronics, Inc. Dryness detection method for clothes dryer based on pulse width
US8549771B2 (en) * 2009-10-21 2013-10-08 Stmicroelectronics, Inc. Dryness detection method for clothes dryer based on pulse width
US9200842B2 (en) 2009-10-21 2015-12-01 Stmicroelectronics, Inc. Dryness detection method for clothes dryer based on pulse width
CN107187890A (zh) * 2017-05-25 2017-09-22 重钢西昌矿业有限公司 矿浆分流装置
CN107187890B (zh) * 2017-05-25 2019-06-28 重钢西昌矿业有限公司 矿浆分流装置

Also Published As

Publication number Publication date
AU8805798A (en) 1999-01-25
DE19728332A1 (de) 1999-01-07
DE19728332C2 (de) 1999-08-12

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