EP1869387A2 - Sechoir continu a structure a plusieurs etages, en particulier pour des produits sous forme de plaques - Google Patents

Sechoir continu a structure a plusieurs etages, en particulier pour des produits sous forme de plaques

Info

Publication number
EP1869387A2
EP1869387A2 EP06722776A EP06722776A EP1869387A2 EP 1869387 A2 EP1869387 A2 EP 1869387A2 EP 06722776 A EP06722776 A EP 06722776A EP 06722776 A EP06722776 A EP 06722776A EP 1869387 A2 EP1869387 A2 EP 1869387A2
Authority
EP
European Patent Office
Prior art keywords
dryer
air
drying
drying air
moisture
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.)
Granted
Application number
EP06722776A
Other languages
German (de)
English (en)
Other versions
EP1869387B1 (fr
Inventor
Alfred Dotzler
Anton Hecht
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.)
Lindauer Dornier GmbH
Original Assignee
Lindauer Dornier GmbH
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 Lindauer Dornier GmbH filed Critical Lindauer Dornier GmbH
Publication of EP1869387A2 publication Critical patent/EP1869387A2/fr
Application granted granted Critical
Publication of EP1869387B1 publication Critical patent/EP1869387B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • F26B21/02—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
    • 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
    • F26B13/101—Supporting materials without tension, e.g. on or between foraminous belts
    • 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

Definitions

  • the invention relates to a continuous dryer in Mehretagenbauweise for particular plate-shaped products, with means, especially rollers or belt-like means for transporting the products within the continuous dryer, the continuous dryer has several, in the transport direction of the products arranged one behind the other and a housing having dryer zones in which drying air circulated by recirculation, wherein each dryer zone has at least one central heat source and a plurality of axial fan arranged vertically one above the other in a fan stand, which axial fans directly promote the drying air in inflow openings of nozzle boxes arranged above and below the transport means for blowing the plate-shaped products and laden with moisture Aspirate drying air via the at least one heat source again.
  • the air laden with moisture in a recirculation air as low-tempered air to the at least one heat source and subsequently returned as high-temperature air to the fans.
  • Residual moisture measurements in the products leaving the continuous dryer at the end of the drying process have shown that products passing through the dryer on the lower levels of the continuous dryer have lower residual moisture than products containing the continuous dryer on the upper floors run through.
  • the cause of the different residual moisture in the finished dried products is to be found in the fact that a part of the moisture laden, tempered circulating air due to their thermodynamic properties in the upper floors of the continuous dryer dammed.
  • the jammed circulating air may contain 40 gr H 2 O per 1 kg of air. Because this, having a relatively high degree of saturation of water circulating air inevitably by means of the upper floors associated fans on the blow boxes of the upper floors the product is recycled, the blown on the product to be dried moist drying air can not the desired Remove the amount of water from the products. Accordingly, leave the dried products, according to the traversed floors of the dryer, with a different proportion of residual moisture. This is where the invention of the patent application begins.
  • the invention has for its object to provide in a designed as a continuous dryer Mehretagentrockner according to the features of the preamble of claim 1 and 4 such conditions that the proportion of residual moisture in the dried products, regardless of the continuous floor of the continuous dryer, at the end of the drying process is almost constant.
  • each dryer zone is dammed moist air and differentiated admixed to the lower floors to be supplied drying air.
  • the admixture takes place in such a way that the amount of added moist air in the first
  • the amount of moist air per suction area of the axial fan can amount to about 30% of the suctionable amount of drying air of the axial fan.
  • the air duct has openings for the differentiated suction of the stagnant air under the horizontal part of the enclosure and the circulating air which is opposite the immediate suction area of each ventilator.
  • Cross-sectional shape of the openings is freely selectable and that the size of the opening can be adjustable. Furthermore, according to the invention, the size of the openings in the direction of the inflow opening of the air channel decreases with non-adjustable openings.
  • the submerged below the horizontal housing and saturated with water circulating air is sucked in the direction of the lower levels of the continuous dryer in an advantageous manner and differentiated supplied via the heat source flowing circulating air. In this way, a nearly uniform residual moisture in the products, regardless of which floor the product to be dried passes through the continuous dryer achieved.
  • Figure 1 shows the sectional view of a continuous dryer in Mehretagenbauweise with
  • FIG. 1 integrated air duct according to line A-A,
  • FIG. 3 shows the top view of a drying zone along line B-B in FIG. 2,
  • Figure 4 is a diagram showing a comparison of the residual moisture content in the dried product with and without the inventive solution.
  • each dryer zone has a housing 2.
  • the housing 2 consists of a horizontal and several vertical heat insulating walls and encloses several dryer floors.
  • each dryer floor is a non-illustrated rolls endlessly circulating screen belt as a means of transport 3 for the product 4 to be dried, e.g. a fiberboard, guided.
  • the individual designed as a sieve conveyor 3 are driven by means that are not shown here. Furthermore, a plurality of pairs of so-called nozzle boxes 5 are arranged on a frame-like frame 6 below and above the transport means 3 over the length of the dryer zone 1. Each nozzle box 5 has at its one end an inflow opening 7, while its other end is closed.
  • the transport means 3 in the present case, the screen belt, opposite, each nozzle box 5 outflow openings.
  • Below the enclosure 2 at least one fan stand 8 is mounted in each dryer zone with a plurality of vertically superimposed Axiallshareern 9, the at least one heat source 10 heated drying air circulating air in the nozzle boxes 5, as indicated by the directional arrows 11.
  • the blown into the nozzle boxes and heated drying air passes, as stated above, via so-called slot nozzles or otherwise designed
  • the products of the upper floors have an increasingly higher residual moisture of e.g. 39% on.
  • FIG. 2 The inventive measure shown in Figure 2 eliminates the differences in terms of the proportion of residual moisture in the products 4.
  • a longitudinal section along the line AA in Figure 1 makes clear in Figure 2 that on the heat source 10 side facing away from the axial fan suction 12th best seen in Figure 3, on the wall 8a of the fan stand 8, a running over all floors and at a distance below the inside of the horizontal enclosure 2a ending flow channel 13 is arranged with a Umhausungsdecke facing inlet opening 13a.
  • the foundation 14 of the dryer zone 1 facing the other end 13 b of the flow channel 13 is closed.
  • the invention proposes to introduce into the suction channel 13 supporting wall 8a of the fan stand 8, in the area of the fan suction areas 12, openings 15 to the jammed below the Umhausungsdecke and a high
  • Damping portion having drying air via the openings 15 and the inflow opening 13a differentiated to suck and supply the recirculation of the lower floors, as indicated by the directional arrows 16.
  • FIG. 3 shows two dryer zone 1 of a continuous dryer according to the line B-B in FIG. 2.
  • the inflow openings 7 of the respective two pairs of nozzle boxes 5 are connected over the entirety of the floors of the dryer zone 1 to a fan stand 8 designed in the manner of an air channel.
  • the drying air in the direction of arrow 11 flows over the product 4 to be dried and absorbs moisture therefrom.
  • the moisture laden drying air symbolize the directional arrows 16.
  • a portion of the moisture laden drying air according to directional arrow 17 is passed through the heat source 10 and fed as drying air according to directional arrows 11 again drying of the product 4.
  • Another part of the moisture-laden drying air builds up accordingly
  • FIG. 4 shows in a diagram the measured proportion of the residual moisture in a plate-shaped product after 20 dryer zones of a continuous throughflow dryer consisting of, for example, 30 dryer zones 1 with a substantially horizontal recirculating air circuit without and with the solution according to the invention.
  • the percentage of residual moisture is plotted on the abscissa of the graph while the ordinate indicates the number of floors.
  • the temperature of the drying air was about 350 ° C.
  • the temperature of the drying air laden with drying air was about 280 ° C.
  • the invention disclosed above is also applicable to products which do not need to be deprived of water, but which undergo only thermal treatment (thermobonding).
  • the air duct integrated in the fan stand can counteract the thermal of the night-tempered air and cause a comparison of the air temperature in the dryer floors.

Abstract

Procédé de séchage de produits contenant de l'eau, de préférence en forme de plaques, dans un séchoir continu à structure à plusieurs étages et séchoir en continu permettant de mettre en oeuvre ledit procédé. Selon la présente invention, l'air humide retenu sous le carter (2) dans un séchoir du type susmentionné est aspiré et transporté dans la zone d'aspiration (12) des soufflantes axiales (9) situées dans les étages inférieurs. De l'air humide est alors ajouté de manière différenciée à une certaine quantité d'air de séchage, puis envoyé vers les caissons (5) en forme de buse du séchoir.
EP06722776A 2005-04-13 2006-04-11 Sechoir continu a structure a plusieurs etages, en particulier pour des produits sous forme de plaques Not-in-force EP1869387B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005017152A DE102005017152B4 (de) 2005-04-13 2005-04-13 Verfahren zum Trocknen von vorzugsweise plattenförmigen Produkten und Durchlauftrockner in Mehretagenbauweise
PCT/DE2006/000639 WO2006108396A2 (fr) 2005-04-13 2006-04-11 Sechoir continu a structure a plusieurs etages, en particulier pour des produits sous forme de plaques

Publications (2)

Publication Number Publication Date
EP1869387A2 true EP1869387A2 (fr) 2007-12-26
EP1869387B1 EP1869387B1 (fr) 2009-07-29

Family

ID=36648507

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06722776A Not-in-force EP1869387B1 (fr) 2005-04-13 2006-04-11 Sechoir continu a structure a plusieurs etages, en particulier pour des produits sous forme de plaques

Country Status (8)

Country Link
US (1) US7997003B2 (fr)
EP (1) EP1869387B1 (fr)
CN (1) CN100592015C (fr)
AT (1) ATE438070T1 (fr)
BR (1) BRPI0610553A2 (fr)
DE (2) DE102005017152B4 (fr)
RU (1) RU2359186C1 (fr)
WO (1) WO2006108396A2 (fr)

Families Citing this family (8)

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CN101836756B (zh) * 2010-04-23 2012-11-21 舟山市普陀明宏机械制造厂 吊挂式食品干燥设备
KR20120097792A (ko) * 2011-02-25 2012-09-05 삼성전자주식회사 퍼니스와 이를 이용한 박막 형성 방법
CA2757608A1 (fr) * 2011-11-07 2013-05-07 Guy Prud'homme Appareil et methode de transformation thermique du bois
CN105276967A (zh) * 2014-06-04 2016-01-27 三久股份有限公司 干燥机的热风装置
DE102018002107A1 (de) * 2018-03-15 2019-09-19 Grenzebach Bsh Gmbh Verfahren und Vorrichtung zum Trocknen von Gipsplatten
CN108486787A (zh) * 2018-04-04 2018-09-04 佛山京联科技信息咨询有限公司 一种新型布料快速清洗烘干机
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CN113686628B (zh) * 2021-07-13 2024-04-23 泰安市食品药品检验检测研究院 用于对含有中药药材物载玻片的处理装置和方法

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Publication number Publication date
DE502006004375D1 (de) 2009-09-10
DE102005017152A1 (de) 2006-10-19
DE102005017152B4 (de) 2007-02-08
CN100592015C (zh) 2010-02-24
ATE438070T1 (de) 2009-08-15
CN101163935A (zh) 2008-04-16
WO2006108396A2 (fr) 2006-10-19
WO2006108396A3 (fr) 2007-10-04
US20080282575A1 (en) 2008-11-20
RU2359186C1 (ru) 2009-06-20
US7997003B2 (en) 2011-08-16
EP1869387B1 (fr) 2009-07-29
BRPI0610553A2 (pt) 2010-07-06

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