EP0370503B1 - Dispositif de séchage pour des matières sensibles à la chaleur et facilement inflammables - Google Patents

Dispositif de séchage pour des matières sensibles à la chaleur et facilement inflammables Download PDF

Info

Publication number
EP0370503B1
EP0370503B1 EP89121645A EP89121645A EP0370503B1 EP 0370503 B1 EP0370503 B1 EP 0370503B1 EP 89121645 A EP89121645 A EP 89121645A EP 89121645 A EP89121645 A EP 89121645A EP 0370503 B1 EP0370503 B1 EP 0370503B1
Authority
EP
European Patent Office
Prior art keywords
air
distribution box
discharge pipe
drying
expansion
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.)
Expired - Lifetime
Application number
EP89121645A
Other languages
German (de)
English (en)
Other versions
EP0370503A1 (fr
Inventor
Wilfried Wiesenborn
Rolf Evertz
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to AT89121645T priority Critical patent/ATE72323T1/de
Publication of EP0370503A1 publication Critical patent/EP0370503A1/fr
Application granted granted Critical
Publication of EP0370503B1 publication Critical patent/EP0370503B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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

Definitions

  • the present invention relates to a device for drying heat-sensitive and highly flammable materials.
  • Drying processes are used today in a variety of areas of technology, e.g. in the manufacture of envelopes or rubber profiles for motor vehicles. In this case, heating coils heated by means of electricity are used, through which the air to be heated is conducted.
  • heating coils heated by means of electricity are used, through which the air to be heated is conducted.
  • such devices have the disadvantage that their operation is associated with very high energy and cost.
  • a method for drying paints, varnishes and adhesives containing solvents is known from German specification 2726222.
  • the special feature of this process is that hot steam is used at a temperature of 100-180 ° C.
  • the process takes advantage of a distillation effect, which accelerates the mass transfer of the solvent-condensate atmosphere.
  • This process was developed precisely because one wanted to avoid the disadvantages known with the previously known hot air processes. It is stated that the hot air not only heats up the ink, but also removes moisture from the paper due to the low water vapor partial pressure in the atmosphere. The consequence of this is shrinking of the paper when drying.
  • the present invention is therefore based on the object of providing a device for drying heat-sensitive and highly flammable materials, comprising a) a heat exchanger with a supply line for room air and a discharge line for the heated room air, b) a gas delivery device arranged in the discharge line and c) to provide a relaxation and distribution box at the end of the discharge from the heat exchanger, which does not have the disadvantages mentioned above.
  • a throttle device is arranged on the suction and pressure side of the gas delivery device, in the relaxation and distribution box an air baffle is located transversely to the flow direction of the air, on the air outlet side of the relaxation and distribution box a plate provided with louvers is arranged for the purpose of uniform distribution of the heated air over the entire air outlet surface and the discharge line is flexible and the expansion and distribution box is designed to be height and side adjustable.
  • the gas delivery device is preferably a fan. This can be provided with an electrical speed control so that the volume flow of the air can be adjusted at any time via the fan. Alternatively or additionally, a throttle device can be attached to the expansion and distribution box for the purpose of controlling the volume flow of the air.
  • the choice of expansion and distribution box size as well as the adjustment options provided by the throttle valves and control devices enable the system to be flexibly adapted to different drying processes depending on the composition and quantity of the material to be dried. Additional possible variations result from the fact that the relaxation and distribution box is arranged to be height and side adjustable. For this purpose, the supply line to the distribution box is also designed as a flexible hose.
  • Such a drying device is particularly suitable for drying the rubberized glue layers of envelopes. Because only through the special arrangement according to the invention of the individual elements of the device can an optimal drying of rubberized glue layers of envelopes be achieved. For this it is essential to achieve a particularly gentle air distribution of the heated air.
  • the throttle valve arranged on the pressure side By means of the throttle valve arranged on the pressure side, the necessary fine adjustment of the air volume flow can surprisingly be achieved so that the envelopes lying loosely on the conveying device are not moved out of position.
  • the adjustable throttle device also ensures that the device according to the invention is particularly adaptable to different products. In addition, it is possible to adapt the system to slight deviations in the glue surface and thickness.
  • the air is evenly distributed over the entire drying section.
  • the consequence of these measures is that an uneven drying of the rubberized glue layers is excluded.
  • the flexible design of the relaxation and distribution box also ensures that the distance can be set exactly according to the respective needs. The risk of overheating (risk of fire) can thus be largely eliminated.
  • the heating hot water system can e.g. run on petroleum or natural gas.
  • a mixing valve 10 is connected upstream of the heat exchanger so that the temperature at the heat exchanger 2 can be regulated.
  • Indoor air is drawn in via a feed line 3 and heated on the suction side via the heat exchangers 2.
  • the feed line 3 to the suction device for the air is provided with a filter.
  • the heated air is fed from the heat exchanger 2 via the discharge line 4 to the expansion and distribution box 6 by means of a gas delivery device 5.
  • a fan is used as the gas supply device, which is arranged between the heat exchanger 2 and the expansion and distribution box 6. It was surprisingly found that the method according to the invention only works with such a suction-side arrangement of the fan. When arranged on the pressure side, the drying device does not work satisfactorily.
  • the regulation of the volume flow of the air can be achieved in different ways. Control of the fan by means of an electrical speed control device is preferred. However, it is also possible to mount a throttle valve 7 on the pressure side of the fan. A throttle device 8 can also be provided on the distribution box. This is preferably attached to the end of the discharge line 4, so that the air can enter the expansion and distribution box 6 at a defined speed. In addition, a further throttle device (not shown) is attached to the suction side of the gas delivery device 5.
  • Throttling 7, 8 and speed control can of course also exist side by side. Due to the large number of setting options, the drying device can be adapted to the purpose of the system. It is also possible to match the heat exchanger 2 at any time.
  • the relaxation and distribution box 6 is movable. According to Figure 1, it is suspended on articulated arms, so that an adjustment up and down and laterally is possible.
  • the derivation 4 is designed as a movable tube.
  • a tongue-shaped air baffle 18 is arranged in the expansion and distribution box. This tapers against the running direction of the belt 1. Above the widest point of the air baffle is the connection point 21 to the air supply line 4 and the throttle device 8. The width of the air baffle at this point is approximately 2/3 of the length of the side 22 of the relaxation and distribution box 6. The length of the air baffle 18 corresponds to approximately 2/3 of the length of the side 23 of the expansion and distribution box 6.
  • the described design and arrangement of the air baffle 18 ensures that the inflowing air spreads evenly over the expansion and distribution box 6. Because the widest side of the air baffle 6 intercepts the air coming from the air line 4, so that it does not flow directly against the plate 12. In contrast, in the areas of increasing tapering of the air baffle, the air speed decreases. The narrowing air plate 18 accordingly ensures that the air is more easily distributed in this area.
  • the relaxation and distribution box 6 is provided on its underside with the plate 12 shown in Figure 4. In this plate there are louvers 19 so that the air passes uniformly outwards over the entire surface of the distribution box 6.
  • a tape 1 is arranged under the relaxation and distribution box 6, on which the letters to be dried are placed.
  • uniform drying of the envelope rubber layers can be achieved over a large area.
  • the air slots and the throttling and regulating devices make it possible for the air to hit the letters at a speed of 3.5-4 m / s, at which it is ensured that the letters are not moved.
  • the number of slots depends on the energy output. I.e. the greater the performance, the greater the number of slots. Accordingly, the distances between the slots are smaller with greater energy output and the same length of the relaxation and distribution box 6. If the drying distance is longer, the number of slots remains the same, provided the energy output is the same. The distances between the slots are accordingly larger in this case.
  • the total area of the slot openings must always be set to 0.2 cm2 / m3 air.
  • the design of the louver openings 19 shown in FIGS. 5 and 6 is of crucial importance for the efficiency of the device according to the invention.
  • the angles of the bent sheet metal sides 24 and 25 are different.
  • the bent sheet 25 has an angle of 36 ° and the sheet 24 has an angle of 39 °.
  • the plate 24 points in the running direction of the conveyor belt 1, while the plate 25 points against this direction. This arrangement ensures particularly gentle air distribution over the materials to be dried.
  • the width of the bent sheets is shown in Figure 6. It can be seen from this that the sheet 26 is wider than the sheet 25.
  • the device according to the invention works with a considerably increased amount of air without the parts to be dried moving due to the escaping air and the air speed.
  • the increased amount of air makes it possible to quickly remove larger amounts of moisture, so that the drying speed and performance increase.
  • the volume flow VL 1500 m3 / h.
  • temperatures are considerably lower than in the prior art.
  • a temperature of 60 ° C-120 ° C is generated in the heat exchanger and passed over the relaxation and distribution box 6.
  • the temperature is preferably 80 ° C.
  • the air outlet temperature at the slots 19 is 40-90 ° C, preferably 70 ° C.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Drying Of Solid Materials (AREA)
  • Beans For Foods Or Fodder (AREA)

Claims (3)

1. Dispositif pour le séchage de matières thermosensibles et aisément inflammables, qui comprend
a) un échangeur de chaleur (2) avec une conduite d'amenée pour l'air ambiant et une conduite d'évacuation (4) pour l'air ambiant chauffé,
b) un dispositif d'alimentation en gaz (5) placé dans la conduite d'évacuation (4) du côté aspiration, et
c) un boîtier de détente et de distribution (6) à l'extrémité de la conduite d'évacuation (4) partant de l'échangeur de chaleur (2) caractérisé en ce que
(d) un dispositif d'étranglement (7) est prévu du côté aspiration et du côté pression du dispositif d'alimentation en gaz (5),
(e) une tôle chicane (18) se trouve dans le boîtier de détente et de distribution, transversalement au sens d'écoulement de l'air,
(f) une plaque (12) munie de fentes d'air (19) pour la répartition uniforme de l'air chauffé sur la totalité de la surface de la sortie d'air est disposée du côté sortie d'air du boîtier de détente et de distribution (6), et en ce que
(g) la conduite d'évacuation (4) est réalisée flexible et le boîtier de détente et de distribution (6) peut être déplacé verticalement et latéralement.
2. Dispositif selon la revendication 1, caractérisé en ce que le boîtier de détente et de distribution (6) est muni d'un dispositif d'étranglement (8) réglable.
3. Dispositif selon l'une quelconque des revendications 1 ou 2, caractérisé en ce que la surface de la sortie d'air formée dans la plaque (12) par les fentes d'air (19) est de 0,2 cm²/m³ d'air.
EP89121645A 1988-11-24 1989-11-23 Dispositif de séchage pour des matières sensibles à la chaleur et facilement inflammables Expired - Lifetime EP0370503B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89121645T ATE72323T1 (de) 1988-11-24 1989-11-23 Trocknungsvorrichtung fuer hitzeempfindliche und leicht entzuendbare materialien.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3839554A DE3839554A1 (de) 1988-11-24 1988-11-24 Trocknungsvorrichtung
DE3839554 1988-11-24

Publications (2)

Publication Number Publication Date
EP0370503A1 EP0370503A1 (fr) 1990-05-30
EP0370503B1 true EP0370503B1 (fr) 1992-01-29

Family

ID=6367723

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89121645A Expired - Lifetime EP0370503B1 (fr) 1988-11-24 1989-11-23 Dispositif de séchage pour des matières sensibles à la chaleur et facilement inflammables

Country Status (3)

Country Link
EP (1) EP0370503B1 (fr)
AT (1) ATE72323T1 (fr)
DE (2) DE3839554A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1993019337A2 (fr) * 1992-03-19 1993-09-30 Reinhart Schmidt Gmbh Dispositif pour secher des produits se trouvant sur une brande transporteuse en mouvement, notamment les parties gommees d'enveloppes
GB9304159D0 (en) * 1992-04-30 1993-04-21 Ici Plc An enclosure for painting and a method of enforcing evaporation from a coating on a panel surface
US5481327A (en) * 1995-02-16 1996-01-02 Eastman Kodak Company Film drying apparatus with uniform flow air tubes
WO2007065672A1 (fr) * 2005-12-07 2007-06-14 Goller Textilmaschinen Gmbh Buse a plusieurs etages
US8074372B2 (en) * 2007-05-08 2011-12-13 Illinois Tool Works Inc. Power drying system

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB153620A (en) * 1919-06-21 1920-10-21 William Edward Clarke Improvements in machines for drying varnished and gummed sheets, and the like
US1888573A (en) * 1929-11-13 1932-11-22 Sadwith Ryan Drier
US2306019A (en) * 1939-10-21 1942-12-22 B F Sturtevant Co Drying apparatus
FR985091A (fr) * 1949-02-19 1951-07-13 Procédé et dispositif pour le séchage de produits céramiques et notamment de tuiles
FR1207995A (fr) * 1957-11-16 1960-02-19 Svenska Flaektfabriken Ab Méthode et appareil pour le séchage ou un traitement analogue d'une matière sous la forme d'une bande au moyen d'un milieu de traitement gazeux
US3808703A (en) * 1970-08-05 1974-05-07 Toyo Enterprises Kk Vehicle drying apparatus
DE2726222B2 (de) * 1977-06-10 1980-02-07 Reinhard Mohn Gmbh, 4830 Guetersloh Verfahren und Vorrichtung zum Trocknen von Farben, Lacken oder Klebern auf Druckträgern, insbesondere auf Druckträgern aus Papier oder Pappe
US4242807A (en) * 1978-08-11 1981-01-06 Hunter Engineering Co., Inc. Paint line flotation oven
GB2121938B (en) * 1982-06-16 1986-04-09 Budapesti Mueszaki Egyetem Drying apparatus
JPS5981488A (ja) * 1982-11-02 1984-05-11 株式会社省熱学研究所 冷凍機と熱交換器による乾燥システム
DE3642710C1 (de) * 1986-08-01 1987-10-29 Dornier Gmbh Lindauer Einrichtung zum Aufblasen eines Behandlungsmediums auf eine in Laengsrichtung bewegte Materialbahn

Also Published As

Publication number Publication date
DE3839554C2 (fr) 1991-07-04
DE3839554A1 (de) 1990-06-13
ATE72323T1 (de) 1992-02-15
DE58900800D1 (de) 1992-03-12
EP0370503A1 (fr) 1990-05-30

Similar Documents

Publication Publication Date Title
EP1058805B2 (fr) Procede et dispositif pour le sechage d'un produit defilant rapidement, notamment pour le sechage d'encre d'imprimerie
DE3910898B4 (de) Verfahren zum Trocknen einer sich bewegenden Bahn und Kombinationstrockner
DE2830094C2 (fr)
DE19937901C2 (de) Trockner für eine Lackieranlage
DE102015205338A1 (de) Trocknungsvorrichtung
DE3131471A1 (de) Vorrichtung zum trocknen feuchter abluft aus einem oder mehreren schuettgut-trocknungsbehaeltern
EP2984430B1 (fr) Séchoir à bande transporteuse comportant une chambre de séchage
DE3890457C2 (de) Verfahren zum berührungsfreien Trocknen einer Papier- oder Kartonbahn
EP0266684B1 (fr) Méthode et sécheur comprenant un dispositif de régénération d'une cartouche de séchage chargée d'humidité
CH634910A5 (de) Kapazitiver hochfrequenzofen zum trocknen von gefalteten faserkabeln, insbesondere chemiefaserkabeln.
EP3720716B1 (fr) Procédé pour le séchage d'un substrat, module de séchage pour la mise en oeuvre du procédé ainsi que système de séchage
DE102008046299B4 (de) Verfahren und Vorrichtung zum Trocknen von Biomasse
EP0778131B1 (fr) Système de guidage de feuilles pour une machine d'impression
EP2984429A1 (fr) Séchoir à bande transporteuse comportant une chambre de séchage et une chambre de refroidissement
EP0370503B1 (fr) Dispositif de séchage pour des matières sensibles à la chaleur et facilement inflammables
EP2546406A2 (fr) Procédé et dispositif destinés au traitement d'un article textile
DE3605100A1 (de) Textilmaschine mit kontinuierlicher konvektiver waermebehandlung
EP0070390A1 (fr) Appareil de séchage des films photographiques en forme de ruban ou de feuille
DE102004059903B4 (de) Verfahren und Anlage zum Beschichten eines Matallbands mit einer lösemittelhaltigen Beschichtung und zum Trocknen und/oder Vernetzen derselben
DE1919957C2 (de) Vorrichtung zum Trocknen oder zur Wärmebehandlung einer laufenden Gewebebahn
DE4345387A1 (de) Vorrichtung zum Trocknen von auf einer bewegten Förderbahn aufliegenden Produkten, insbesondere der gummierten Leimschichten von Briefumschlägen
DE8817196U1 (de) Trocknungsvorrichtung
DE3844834C2 (en) Drier for thermally sensitive material
DE4029488A1 (de) Verfahren zum beruehrungslosen trocknen einer papier- oder kartonbahn
DE102017108695B4 (de) Durchlauftrockner mit einer ersten und einer zweiten Sektion

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

Kind code of ref document: A1

Designated state(s): AT BE CH DE ES FR GB GR IT LI LU NL SE

17P Request for examination filed

Effective date: 19901123

17Q First examination report despatched

Effective date: 19910206

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE ES FR GB GR IT LI LU NL SE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRE;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.SCRIBED TIME-LIMIT

Effective date: 19920129

Ref country code: FR

Effective date: 19920129

Ref country code: GB

Effective date: 19920129

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19920129

Ref country code: NL

Effective date: 19920129

Ref country code: ES

Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY

Effective date: 19920129

Ref country code: BE

Effective date: 19920129

Ref country code: SE

Effective date: 19920129

REF Corresponds to:

Ref document number: 72323

Country of ref document: AT

Date of ref document: 19920215

Kind code of ref document: T

REF Corresponds to:

Ref document number: 58900800

Country of ref document: DE

Date of ref document: 19920312

EN Fr: translation not filed
NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
GBV Gb: ep patent (uk) treated as always having been void in accordance with gb section 77(7)/1977 [no translation filed]
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Effective date: 19921123

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Effective date: 19921130

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19921130

Ref country code: CH

Effective date: 19921130

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

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

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19951108

Year of fee payment: 7

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19970801