EP3765806B1 - Düsenkasten für eine trocknungsvorrichtung zum trocknen plattenartiger materialien - Google Patents

Düsenkasten für eine trocknungsvorrichtung zum trocknen plattenartiger materialien Download PDF

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Publication number
EP3765806B1
EP3765806B1 EP19720360.7A EP19720360A EP3765806B1 EP 3765806 B1 EP3765806 B1 EP 3765806B1 EP 19720360 A EP19720360 A EP 19720360A EP 3765806 B1 EP3765806 B1 EP 3765806B1
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EP
European Patent Office
Prior art keywords
drying
nozzle box
air
nozzles
nozzle
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
EP19720360.7A
Other languages
German (de)
English (en)
French (fr)
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EP3765806A1 (de
Inventor
Christoph Straetmans
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.)
Grenzebach BSH GmbH
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Grenzebach BSH GmbH
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B3/00—Drying solid materials or objects by processes involving the application of heat
    • F26B3/02—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air
    • F26B3/04—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour circulating over or surrounding the materials or objects to be dried
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B13/00—Machines and apparatus for drying fabrics, fibres, yarns, or other materials in long lengths, with progressive movement
    • F26B13/10—Arrangements for feeding, heating or supporting materials; Controlling movement, tension or position of materials
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B15/00—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form
    • F26B15/10—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form with movement in a path composed of one or more straight lines, e.g. compound, the movement being in alternate horizontal and vertical directions
    • F26B15/12—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form with movement in a path composed of one or more straight lines, e.g. compound, the movement being in alternate horizontal and vertical directions the lines being all horizontal or slightly inclined
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B15/00—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form
    • F26B15/10—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form with movement in a path composed of one or more straight lines, e.g. compound, the movement being in alternate horizontal and vertical directions
    • F26B15/12—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form with movement in a path composed of one or more straight lines, e.g. compound, the movement being in alternate horizontal and vertical directions the lines being all horizontal or slightly inclined
    • F26B15/122—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form with movement in a path composed of one or more straight lines, e.g. compound, the movement being in alternate horizontal and vertical directions the lines being all horizontal or slightly inclined the objects or batches of material being carried by transversely moving rollers or rods which may rotate
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/004—Nozzle assemblies; Air knives; Air distributors; Blow boxes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/02—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B23/00—Heating arrangements
    • F26B23/02—Heating arrangements using combustion heating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B3/00—Drying solid materials or objects by processes involving the application of heat
    • F26B3/28—Drying solid materials or objects by processes involving the application of heat by radiation, e.g. from the sun
    • F26B3/283—Drying solid materials or objects by processes involving the application of heat by radiation, e.g. from the sun in combination with convection

Definitions

  • the invention relates to a nozzle box which can be arranged in a drying device in the transverse direction to boards to be dried in the drying device by means of drying air, which has a conical shape in at least one direction perpendicular to the direction of flow of the drying air in the nozzle box and which has a nozzle provided, the drying surface facing the board, the drying air flowing onto the board from a plurality of nozzles arranged in rows in the drying surface.
  • a drying device is used for drying panels, which can be guided in tiers through a drying space encompassed by the drying device, the panels in the drying device being brought into contact for drying by drying air generated in a ceiling box and then introduced into nozzle boxes via a pressure space and the drying air can be discharged from the panels via a suction chamber after moisture has been absorbed.
  • the drying of board-like materials such as gypsum boards is preferably carried out by predominantly convective heat transfer in the form of heated air flowing over them.
  • the panels which are usually arranged over several levels, are guided through the dryer with the help of conveyors such as roller conveyors or filter belts.
  • drying systems are usually operated in circulating air mode. The drying air is brought to the panels several times and heated up again after each contact. In this way, the air is increasingly enriched with moisture, only a small part of the drying air is released into the environment as exhaust air in order to remove moisture and smoke gases into the environment.
  • a distinguishing feature of different types of dryer is the type of air flow over the drying material.
  • the air can essentially be guided to the plate in the form of a transverse ventilation, a longitudinal ventilation, or a so-called impingement jet ventilation.
  • the drying air is guided over the material to be dried from the side, across the conveying direction of the board-like material. As the drying air cools down more and more on its way over the material to be dried, This results in different drying speeds across the width. For this reason, this method is not used for sensitive materials such as plasterboard.
  • longitudinal ventilation the drying air travels a long way along the longitudinal axis of the dryer, flows over the board, dries it and cools it down considerably. The drying air can thus be discharged at low temperatures, energetically particularly favorable near the dew point of the drying air. Condensation heat can then be used in a targeted manner to heat fresh air with the help of a heat exchanger.
  • the drying air is brought in from the side of the drying system in nozzle boxes, also known as drying chambers, and blown perpendicularly onto the surface of the drying material via air outlet nozzles. From there, this air flows to the opposite side of the drying system.
  • nozzle boxes also known as drying chambers
  • Dryers that work according to a similar structure are now widespread worldwide.
  • One of its advantages is that the desired drying temperature and climate can be freely selected over the length of the dryer due to the construction of many relatively short drying chambers, each of which can be ventilated and heated individually. In this way, the drying conditions can be adapted to the needs of the material to be dried.
  • the dryer is also z. B. with product changes, excellent controllable.
  • Such a plant is in the DE 19 46 696 A described for drying gypsum boards.
  • a drying chamber is designed in such a way that the highest possible heat input and the most uniform drying possible across the width of the drying material are guaranteed.
  • a drying system in which a two-stage drying process is used.
  • the second drying stage is heated with the interposition of a heat exchanger from the exhaust air from the first drying stage.
  • the panels should be dried in the first drying stage at high temperature and high humidity and in the second drying stage at relatively low temperature and low humidity.
  • the first stage is longitudinally ventilated
  • the second stage is transversely ventilated.
  • a method for drying panels that are guided in tiers through a device divided into drying chambers, the panels being brought into contact with the drying air in a drying device by means of impingement jet ventilation, and the impingement jet ventilation being ensured by means of cross-ventilated nozzle boxes.
  • the drying device is a main drying stage or a final drying stage in a drying plant.
  • a drying plant can have a plurality of drying zones functioning according to the principle of impingement jet ventilation, as shown in FIG DE 10 2005 017 187 B4 is known.
  • drying operation can be set in which the power consumption is not higher than with a state-of-the-art drying process, but the drying is still significantly more intensive than with the standard version. Better drying is thus achieved with the same power consumption.
  • the advantage of the nozzle box designed according to the invention is a significant reduction in zones of the plates that are too hot in the side area thereof.
  • a drying device equipped with nozzle boxes constructed according to the invention can be put into operation with less effort than conventional drying devices.
  • the maintenance effort is also reduced.
  • the air distribution over the dryer space, which is formed by a plurality of floors with nozzle boxes arranged next to one another, is improved. A higher pressure loss is caused at the nozzles; the circulating air of the drying air is reduced.
  • plate-shaped materials can be dried gently by means of impingement jet ventilation using less energy than in the prior art.
  • the nozzles have a diameter of less than 10 mm, uniform drying is also promoted.
  • the speed of the drying air emerging from the nozzles is advantageously between 17 and 21 m/s.
  • the air flow is evened out by choosing a distance of more than 60 mm between the nozzles.
  • the nozzles are advantageously arranged in three rows running in the longitudinal direction of the nozzle box.
  • the rows are 55mm to 80mm apart.
  • the nozzle boxes are constructed conically only in the vertical spatial direction, or they are also conically constructed in a further direction relative to the flow direction of the drying air in the nozzle boxes.
  • a radiation plate is additionally arranged on its two long sides to the side of the rows of nozzles in the direction of the boards to be dried. As a result, they improve drying in the side area of the nozzle box because they focus the radiant heat from the nozzle box in the direction of the gypsum board.
  • the distance between the nozzles and the plates is preferably at least 22 mm and reaches a maximum value of 50 mm.
  • the invention also relates to a drying device for drying panels, which can be guided in tiers through a drying space comprised by the drying device, the panels in the drying device being brought into contact for drying by drying air generated in a ceiling box and then introduced into nozzle boxes via a pressure space and the drying air, after absorbing moisture from the boards, can be discharged via a suction chamber, the drying device being characterized in that it has a plurality of nozzle boxes which are constructed as stated above.
  • a drying device ( 1 ) of a cross-ventilated gypsum board cooler flows drying air, the flow direction of which is indicated by arrows.
  • Preheated fresh air is fed to a burner 1 as combustion air 2 .
  • the air heated by the burner 1 is conveyed via a circulating air fan 4 into a pressure chamber 5.
  • the pressure chamber 5 is used to evenly distribute the air to the individual floors of a drying room 6.
  • the air is first pressed into nozzle boxes 7, from which it passes Perforated nozzles, which are arranged on the top or bottom of the nozzle boxes, vertically Plasterboard 8 or other panels to be dried is blown.
  • the plates 8 rest on support rollers and are transported by means of a transport device (not explained in detail here) perpendicular to the viewing plane of 1 promoted.
  • the support rollers are arranged between and slightly above the nozzle boxes 7 so that the drying air flows onto the plates 8 between the support rollers.
  • the width of the pressure chamber 5 is greater in relation to the width of the suction chamber 9.
  • Baffles 12, 13, 14 and 15 can be provided to guide the air flow; an air straightener 16 is also provided to equalize the air flow.
  • the air circulation circuit closes at the burner 1.
  • Two nozzle boxes 7 ( 2 ) are each arranged between two plates 7 to be dried. On the side facing the suction chamber 9 they are spaced apart from one another by an element 17 used for fastening. 3 shows a double-conical nozzle box 7' which, in contrast to the nozzle boxes 7, also tapers towards the side of the suction chamber 9 in the plane provided with nozzles 18, from which the air flows to the board 8 to be dried.
  • each nozzle box 7 On the side facing each panel 8, each nozzle box 7 is provided with nozzles 18 arranged in three rows, from which the drying air flows to the panel 8 in question.
  • nozzle boxes 7 On the side facing the suction chamber 9, the nozzle boxes 7 have above or below a locking plate 19 ( 4 ) has a slot 20 through which dirt can be removed from the nozzle box 7.
  • radiation plates 21 are arranged on each longitudinal side of the surface of the nozzle boxes 7 which faces the board 8 to be dried.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Microbiology (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Sustainable Development (AREA)
  • Textile Engineering (AREA)
  • Drying Of Solid Materials (AREA)
EP19720360.7A 2018-03-15 2019-03-15 Düsenkasten für eine trocknungsvorrichtung zum trocknen plattenartiger materialien Active EP3765806B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102018002073.9A DE102018002073A1 (de) 2018-03-15 2018-03-15 Düsenkasten für eine Trocknungsvorrichtung zum Trocknen von Gipsplatten
PCT/EP2019/000079 WO2019174784A1 (de) 2018-03-15 2019-03-15 Düsenkasten für eine trocknungsvorrichtung zum trocknen plattenartiger materialien

Publications (2)

Publication Number Publication Date
EP3765806A1 EP3765806A1 (de) 2021-01-20
EP3765806B1 true EP3765806B1 (de) 2023-01-11

Family

ID=66334340

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19720360.7A Active EP3765806B1 (de) 2018-03-15 2019-03-15 Düsenkasten für eine trocknungsvorrichtung zum trocknen plattenartiger materialien

Country Status (11)

Country Link
US (1) US20210018265A1 (ko)
EP (1) EP3765806B1 (ko)
JP (1) JP7102655B2 (ko)
KR (1) KR20200130727A (ko)
CN (1) CN111886467A (ko)
BR (1) BR112020018342A2 (ko)
CA (1) CA3093483A1 (ko)
DE (1) DE102018002073A1 (ko)
EA (1) EA202092140A1 (ko)
ES (1) ES2939250T3 (ko)
WO (1) WO2019174784A1 (ko)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0854338B1 (de) * 1997-01-17 2002-11-13 BABCOCK-BSH GmbH Trockner für band- oder plattenförmiges Gut

Family Cites Families (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1206718B (de) * 1959-04-22 1965-12-09 Beloit Iron Works Trockenvorrichtung fuer Faserstoffbahnen
US3529357A (en) * 1968-09-20 1970-09-22 Moore Dry Kiln Co Method and apparatus for high-speed drying of gypsum board
US3739490A (en) * 1971-06-01 1973-06-19 Weyerhaeuser Co Orifice pattern for jet dryers
DE2447779A1 (de) * 1973-10-10 1975-04-17 Beloit Corp Luftdruckaufprallvorrichtung zum trocknen einer papierbahn
US3936953A (en) * 1973-10-10 1976-02-10 Beloit Corporation Air impingement system
US3964656A (en) * 1975-04-14 1976-06-22 Tec Systems, Inc. Air bar assembly for web handling apparatus
DE2613512A1 (de) 1976-03-30 1977-10-06 Buettner Schilde Haas Ag Zweistufiges trocknungsverfahren und trocknungsanlage
US4428128A (en) * 1982-02-04 1984-01-31 The Coe Manufacturing Company Jet tube dryer retainer system
JPS62167161A (ja) * 1986-01-21 1987-07-23 Fuji Photo Film Co Ltd 空気吹出箱
JPH03291489A (ja) * 1990-04-09 1991-12-20 Hirano Tecseed Co Ltd 熱風乾燥装置
DE4406846C1 (de) * 1994-03-03 1995-05-04 Koenig & Bauer Ag Vorrichtung zum Trocknen von bedruckten Bogen oder Bahnen in Druckmaschinen
FI106270B (fi) * 1996-09-20 2000-12-29 Valmet Corp Menetelmä pintakäsitellyn paperirainan tai vastaavan kuivaamiseksi paperikoneen jälkikuivatusosassa sekä menetelmää soveltava paperikoneen jälkikuivatusosa
DE29701755U1 (de) * 1997-02-01 1997-04-17 Babcock-BSH GmbH, 36251 Bad Hersfeld Vorrichtung zum Wärmebehandeln von durchlaufenden platten- oder bandförmigen Gütern
DE19837048C2 (de) * 1998-08-17 2000-11-30 Babcock Bsh Gmbh Düsenkasten für Durchlauftrockner, insbesondere für Furniertrockner
DE19922165C2 (de) * 1999-05-12 2001-08-30 Babcock Bsh Gmbh Trockner für band- oder plattenförmiges Gut
DE10146179C1 (de) * 2001-09-19 2002-10-31 Babcock Bsh Gmbh Anlage zum Trocknen von Gipskartonplatten
WO2004101238A2 (en) * 2003-05-12 2004-11-25 Coe Manufacturing Company Veneer dryer
DE102005017187B4 (de) 2005-04-13 2007-06-21 Lindauer Dornier Gmbh Durchlauftrockner in Mehretagenbauweise, insbesondere für plattenförmige Produkte
DE102009059822B4 (de) * 2009-12-21 2015-12-10 Grenzebach Bsh Gmbh Verfahren und Vorrichtung zum Trocknen von Gipsplatten
DE212013000118U1 (de) * 2012-05-15 2015-01-30 Andritz Technology And Asset Management Gmbh Zellstofftrockner mit Blaskästen zum Trocknen einer Zellstoffbahn
FI127350B (en) * 2015-09-07 2018-04-13 Raute Oyj Nozzle box and dryer using the same
KR101796489B1 (ko) * 2015-10-21 2017-11-10 재단법인 한국섬유기계융합연구원 고속 dtp 설비의 건조기용 열풍 건조노즐

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0854338B1 (de) * 1997-01-17 2002-11-13 BABCOCK-BSH GmbH Trockner für band- oder plattenförmiges Gut

Also Published As

Publication number Publication date
US20210018265A1 (en) 2021-01-21
CA3093483A1 (en) 2019-09-19
ES2939250T3 (es) 2023-04-20
WO2019174784A1 (de) 2019-09-19
EP3765806A1 (de) 2021-01-20
JP2021519909A (ja) 2021-08-12
DE102018002073A1 (de) 2019-09-19
EA202092140A1 (ru) 2021-03-04
BR112020018342A2 (pt) 2020-12-29
CN111886467A (zh) 2020-11-03
KR20200130727A (ko) 2020-11-19
JP7102655B2 (ja) 2022-07-20

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