DK161540B - METHOD AND APPARATUS FOR DRYING A MATERIAL COURSE DURING ITS PROCEDURE - Google Patents

METHOD AND APPARATUS FOR DRYING A MATERIAL COURSE DURING ITS PROCEDURE Download PDF

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Publication number
DK161540B
DK161540B DK177984A DK177984A DK161540B DK 161540 B DK161540 B DK 161540B DK 177984 A DK177984 A DK 177984A DK 177984 A DK177984 A DK 177984A DK 161540 B DK161540 B DK 161540B
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Prior art keywords
air
drying
treatment
fresh air
material web
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DK177984A
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Danish (da)
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DK177984A (en
DK177984D0 (en
DK161540C (en
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Karl-Heinz Gottschalk
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Babcock Textilmasch
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    • 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

Abstract

1. Method for drying running fabric webs in dryers operated with fresh air, circulating air and exhaust air, characterized by the fact that supply of fresh air in the same or essentially the same direction as the fabric web through the treatment is effected at the beginning of the treatment, and discharge of exhaust air is only at the rear part of the process, with air being blown onto the fabric web and being guided away from the fabric web repeatedly.

Description

DK 161540 BDK 161540 B

Opfindelsen angår en fremgangsmåde af den i krav 1' s indledning angivne art. Ved alle kendte tørremetoder og tørreapparater af denne type bortsuges der fra hver af et antal tørresektioner i apparatet særskilt afgangsluft, 5 og der indføres udefra i hver tørresektion særskilt friskluft. Dette indebærer, at der fra apparatets forreste del udsuges meget fugtig afgangsluft, medens der fra apparatets bageste del udsuges afgangsluft med et lille fugtighedsindhold. Dette betyder, at der bortsuges for 10 meget afgangsluft uden tilstrækkeligt fugtighedsindhold, hvorved energibehovet og det specifikke varmebehov ved fremgangsmåden og i apparatet vil være unødvendigt stort. Dette gælder også for det fra DE-A-3 012 880 kendte tørreapparat.The invention relates to a method of the kind set out in the preamble of claim 1. In all known drying methods and dryers of this type, separate exhaust air is extracted from each of a number of drying sections in the apparatus, and separate fresh air is introduced from the outside in each drying section. This means that very humid exhaust air is extracted from the front part of the apparatus, while exhaust air from the rear part of the apparatus is extracted with a low moisture content. This means that too much exhaust air is exhausted without sufficient moisture content, whereby the energy requirement and the specific heat demand in the process and in the apparatus will be unnecessarily large. This also applies to the dryer known from DE-A-3 012 880.

1515

Denne erkendelse har ført til, at tørreluften under behandlingen er blevet ført i modstrøm til materialebanens fremføringsretning, hvorved man har opnået det ønskede resultat hvad angår energiøkonomien.This realization has led to the drying air during the treatment being directed countercurrent to the direction of the material path, thereby obtaining the desired result in terms of the energy economy.

2020

Undersøgelser har imidlertid vist, at anvendelsen af ren luft i området med stort fugtighedsindhold, d.v.s. i tørreprocessens begyndelsesfase, har ført til de bedste tørringsresultater hvad angår tørringshastigheden. I tørrin-25 gens slutfase med små fugtighedskoncentrationer i tørreluften er tørring ved hjælp af varm damp imidlertid mere effektiv end lufttørring. Dette indebærer, at det til opnåelse af en stor tørringshastighed under den samlede tørreproces er hensigtsmæssigt, først at tørre med luft 30 ved stor fugtighedskoncentration, og ved sluttørringen at anvende damp. Disse overvejelser har ført til konstruktion af tørreapparater med to fra hinanden helt adskilte behandlingsområder, nemlig et område med lufttørring og et område med damptørring. Et sådant apparat er imidler-35 tid kompliceret og bekosteligt.However, studies have shown that the use of clean air in the high humidity area, i.e. in the initial phase of the drying process, has led to the best drying results in terms of drying speed. However, in the final phase of the drying phase with low moisture concentrations in the drying air, drying by means of hot steam is more effective than air drying. This means that in order to achieve a high drying rate during the overall drying process, it is appropriate to first dry with air 30 at high humidity concentration and to use steam at the final drying. These considerations have led to the design of dryers with two completely separate treatment areas, namely an area of air drying and an area of steam drying. Such an apparatus, however, is complicated and expensive.

DK 161540BDK 161540B

22

Den foreliggende opfindelse har derfor til formål at tilvejebringe en enkel tørremetode, ved hvilken man udelukkende ved anvendelse af tørreluft kan kombinere fordelene ved lufttørring med fordelene ved varmdamptørring.The present invention therefore aims to provide a simple drying method in which the advantages of air drying can only be combined with the advantages of hot steam drying.

55

Opfindelsens formål er baseret på ræsonnementet, at tørreluften under den fremadskridende tørring vil optage stadig mere damp fra den fordampede væske, så . at den i tiltagende grad med damp berigede tørrelufts tørreegen-10 skaber efterhånden vil nærme sig varmdamps. Dette ræsonnement gælder imidlertid ikke for et fra DE-A-2 058 291 kendt tørreanlæg, hvor den i tørreøjemed tilførte gas under tørreprocessens væsentlige del ikke står i direkte kontakt med materialet, som skal tørres, og derfor heller 15 ikke kan optage fugtighed fra materialet.The purpose of the invention is based on the reasoning that the drying air during the progressive drying will absorb more steam from the evaporated liquid, then. that the drying properties of the enriched drying air will gradually become closer to hot steam. However, this reasoning does not apply to a drying system known from DE-A-2,058,291, where the gas supplied for drying purposes during the essential part of the drying process is not in direct contact with the material to be dried, and therefore can not absorb moisture from the material. .

Den foreliggende opfindelses formål opnås ved de i krav l's kendetegnende del angivne foranstaltninger.The object of the present invention is achieved by the measures set out in the characterizing part of claim 1.

20 Erfaringen har vist, at det er hensigtsmæssigt at forvarme friskluften, inden den tilføres behandlingen. Inden friskluften tilføres behandlingen, kan den forvarmes med afgangsluft, som direkte tilsættes friskluften. Alternativt kan varmen indirekte overføres fra afgangsluften til 25 friskluften. Forvarmes friskluften ved direkte tilsætning af afgangsluft, bør der anvendes afgangsluft med stort fugtighedsindhold fra behandlingen.Experience has shown that it is appropriate to preheat the fresh air before applying it to the treatment. Before the fresh air is supplied to the treatment, it can be preheated with exhaust air, which is directly added to the fresh air. Alternatively, the heat can be indirectly transferred from the exhaust air to the fresh air. If fresh air is preheated by direct addition of exhaust air, exhaust air with high humidity content from the treatment should be used.

Opfindelsen angår tillige et tørreapparat af den i krav 30 6’s indledning angivne art til udøvelse af fremgangsmå den. Apparatet er ejendommeligt ved det i krav 5’s kendetegnende del angivne.The invention also relates to a dryer of the kind set forth in claim 30 6 for carrying out the method. The apparatus is peculiar to the characteristic portion of claim 5.

Kravene 7 til 12 kendetegner yderligere fordelagtige 35 ejendommeligheder ved tørreapparatet.Claims 7 to 12 further characterize advantageous features of the dryer.

DK 161540 BDK 161540 B

3 I det følgende forklares opfindelsen nærmere ved hjælp af tegningen, hvor fig. 1 viser en udførelsesform for tørreapparatet ifølge 5 opfindelsen, hvor tørreluft strømmer gennem apparatet i medstrøm med en gennem dette passerende materialebane, der skal tørres, fig. 2 viser apparatet ifølge fig. 1, set fra en anden 10 side til anskueliggørelse af nævnte medstrømsstyring, fig. 3 viser en udførelsesform for tørreapparatet med medstrømsstyring og med ekstern luftstyring, 15 fig. 4 viser en udførelsesform med medstrømsstyring :og en før en sidste tørresektion anbragt afgangsblæser, fig. 5 viser en udførelsesform, hvor friskluft forvarmes direkte ved hjælp af afgangsluft, ved, at denne tilbilan-20 des friskluften, og fig. 6 viser en udførelsesform, hvor friskluft i- en varmeveksler forvarmes indirekte ved hjælp af afgangsluft.3 In the following, the invention is explained in more detail with reference to the drawing, in which fig. 1 shows an embodiment of the dryer according to the invention, in which drying air flows through the apparatus in a co-flow with a material path passing through it, fig. 2 shows the apparatus of FIG. 1, seen from another side for illustrating said co-current control; FIG. 3 shows an embodiment of the co-flow controller with external air control; FIG. Fig. 4 shows an embodiment with co-current control: and a discharge blower arranged before a last drying section; 5 shows an embodiment in which fresh air is preheated directly by means of exhaust air by providing it with fresh air, and fig. 6 shows an embodiment in which fresh air in a heat exchanger is indirectly preheated by exhaust air.

25 Ved udførelsesformen ifølge fig. 1 med fuldstændig medstrømsstyring kombineret med luftcirkulation suges friskluft ved hjælp af en blæser 19 gennem et friskluftindløb 15 ind i et tørrehus 13. Luften passerer via varmerør 20 ind i et behandlingsrum 11 med en første tørresektion 30 12. Behandlingsmidlet, der efter behandlingen strømmer bort fra en materialebane 10, der skal tørres, føres som antydet ved pilene til en efterfølgende, tilsvarende tørresektion 12, hvor det påny blæses på materialebanen 10, og således fremdeles, indtil behandlingens afslutning, 35 hvor behandlingsmidlet bortsuges ved hjælp af en blæser 21 og gennem et afgangsluftudløb 23 fjernes fra behandlingszonen. Til understøttelse af behandlingsmidlets strømning og til yderligere opvarmning af dette har ap- paratet yderligere blæsere 22 og varmerør 20, der er an bragt i behandlingsluftens strømningsbane. j25 In the embodiment of FIG. 1 with complete co-flow control combined with air circulation, fresh air is sucked in by means of a blower 19 through a fresh air inlet 15 into a drying house 13. The air passes via heat pipe 20 into a treatment room 11 with a first drying section 30 12. The treatment agent which after treatment flows away from a material web 10 to be dried is passed, as indicated by the arrows, to a subsequent, corresponding dry section 12, where it is again blown onto the material web 10, and thus still until the end of the treatment, 35 where the treating agent is suctioned by a blower 21 and through a blower 21. exhaust air outlet 23 is removed from the treatment zone. To support the flow of the treating agent and to further heat it, the apparatus has additional fans 22 and heating pipes 20 arranged in the flow path of the treating air. j

DK 161540 BDK 161540 B

4 5 Den i fig. 2.anskueliggjorte styring af behandlingsluften svarer til den i fig. 1 viste. Blæserne 22 og varmerørene 20 er anbragt skiftevis på begge sider af materialebanen i behandlingsrummet 11. Også her er der realiseret en fuldstændig medstrømsstyring for behandlingsluften fra 10 materialebanen 10's indføring i rummet 11 til dens fjernelse fra dette.The embodiment of FIG. 2. The control air treatment shown is similar to that of FIG. 1. The fans 22 and the heating pipes 20 are arranged alternately on both sides of the material web in the treatment room 11. Again, a complete co-current control of the treatment air has been realized from the introduction of the material web 10 into the room 11 for its removal therefrom.

Fig. 3 viser set fra siden et tørreapparat i en udførelsesform med til· dels ekstern medstrømsstyring af luften 15 via ydre forbindelsesrør 16, i hvilke der er anbragt luften cirkulerende blæsere 22 med opvarmningsorganer 20. Friskluften indføres i tørrehuset 13 gennem friskluftind-løbet 15,. medens afgangsluften forlader tørrehuset gennem en udstrømningsstuds 23.FIG. 3 is a side view of a dryer in an embodiment with partly external co-flow control of the air 15 via external connecting pipes 16, in which the air circulating fans 22 with heating means 20. The fresh air is introduced into the drying house 13 through the fresh air inlet 15. while the exhaust air leaves the drying house through an outlet nozzle 23.

2020

Fig. 4 svarer vidtgående til fig. 1, idet afgangsluften dog strømmer ud af tørrehuset 13 før en sidste tørresektion 17, i hvilken der næsten findes en dampatmosfære, hvilket er ønskeligt og fordelagtigt til sluttørring af 25 materialebanen.FIG. 4 corresponds to FIG. 1, however, the exhaust air flows out of the drying housing 13 before a final drying section 17, in which there is almost a steam atmosphere, which is desirable and advantageous for final drying of the material web.

Fig. 5 viser set fra siden en udførelsesform for tørreapparat, i hvilken der til forvarmning af friskluften til denne direkte kan tilføres afgangsluft ved hjælp af en 30 blæser 25 og via et opvarmningsorgan 20.FIG. 5 is a side view of an embodiment of a dryer in which, for preheating the fresh air to it, exhaust air can be supplied directly by means of a blower 25 and via a heating means 20.

Fig. 6 anskueliggør en supplerende energigenvinding fra afgangsluften og denne energis overførsel til friskluften via en varmeveksler 18. I fig. 6 ses desuden et kombine-35 ret organ 24 til måling af fugtighed og til regulering.FIG. 6 illustrates a supplementary energy recovery from the exhaust air and the transfer of this energy to the fresh air via a heat exchanger 18. In FIG. 6, there is also seen a combined means 24 for measuring humidity and for controlling.

Da der kun findes ét bortstrømningssted for afgangsluften, kræves der kun et enkelt bekosteligt organ til kom-Since there is only one discharge point for the exhaust air, only a single costly means is required for the compressed air.

DK 161540 BDK 161540 B

5 bineret fugtighedsmåling og regulering.5 binary moisture measurement and regulation.

Tørremediets styring i medstrøm til materialebanen gennem tørreapparatet medfører følgende yderligere fordele over 5 for de kendte tørreapparater og tørremetoder. Der fås en reduceret kondensation af fugtighed på materialebanen, fordi der i den zone, hvor den kolde materialebane indføres i tørreapparatet, findes meget tør luft. Desuden opnås en øget fordampningsydelse, fordi kølegrænsetempera-10 turen i tørreapparatets forreste zone er lav. I denne zone findes der på materialebanen tilstrækkelig meget overfladevand til fordampningen, så at der opnås et højere At og dermed en intensiveret varmeovergang.The co-flow of the drying medium to the material web through the dryer results in the following additional advantages over 5 for the known dryers and drying methods. A reduced condensation of moisture is obtained on the material web because in the zone where the cold material web is introduced into the dryer, very dry air is present. In addition, increased evaporation performance is obtained because the cooling limit temperature in the front zone of the dryer is low. In this zone, there is sufficient surface water on the material path for the evaporation to achieve a higher At and thus an intensified heat transfer.

15 20 25 30 3515 20 25 30 35

Claims (12)

1. Fremgangsmåde til tørring af mindst én fortløbende 5 tilført materialebane (10) i et tørreapparat, der drives ved hjælp af friskluft, cirkuleret luft og afgangsluft, kendetegnet ved, at friskluften tilføres ved behandlingens begyndelse og føres i det mindste hovedsageligt i samme retning gennem behandlingen som materiale-10 banen, medens der kun bortledes afgangsluft fra behandlingszonens bageste del, og at luften mellem sin tilførsel og bortledning under behandlingen gentagne gange blæses mod materialebånen.A method of drying at least one consecutive material web (10) in a dryer operated by fresh air, circulated air and exhaust air, characterized in that the fresh air is supplied at the beginning of the treatment and is passed at least substantially in the same direction through treatment as the material web, while only exhaust air is discharged from the rear of the treatment zone and the air between its supply and discharge during treatment is repeatedly blown toward the material web. 2. Fremgangsmåde ifølge krav 1, kendetegnet ved, at friskluften forvarmes, inden den tilføres behandl lingen.Process according to claim 1, characterized in that the fresh air is preheated before being applied to the treatment. 3. Fremgangsmåde ifølge krav 2, kendetegnet 20 ved, at friskluften, der tilføres behandlingen, forvarmes ved hjælp af fra behandlingen udtaget afgangsluft, som direkte tilsættes friskluften.Process according to claim 2, characterized in that the fresh air supplied to the treatment is preheated by means of exhaust air extracted from the treatment which is directly added to the fresh air. 4. Fremgangsmåde ifølge krav 2, kendetegnet 25 ved, at friskluften, der tilføres behandlingen, forvarmes indirekte ved hjælp af fra behandlingen bortledt afgangsluft.Process according to claim 2, characterized in that the fresh air supplied to the treatment is indirectly preheated by means of exhaust air derived from the treatment. 5. Fremgangsmåde ifølge et vilkårligt af kravene 1 til 4, 30 kendetegnet ved, at afgangsluften ledes bort fra behandlingen med et reguleret stort fugtighedsind-hold.Process according to any one of claims 1 to 4, 30, characterized in that the exhaust air is diverted from the treatment with a controlled high moisture content. 6. Tørreapparat til udøvelse af fremgangsmåden ifølge et 35 vilkårligt af kravene 1 til 5, og indbefattende et tørrehus (13) og organer til styring af materialebanen (10), der skal tørres, gennem et behandlingsrum (11) i tørrehu- DK 161540 B set (13), samt midler til tørring ved hjælp af friskluft, cirkuleret luft og afgangsluft, kendetegnet ved, at tørrehuset (13) har et antal successivt af materialebanen passerede ens tørresektioner (17) indrettet 5 til gentagen påblæsning af luften på materialebanen og til genbortledning af denne luft ved hjælp af blæsedyser, dysegrupper eller dyselegemer (12) og mellem disse beliggende bortstrømningsrum, og at et indløb (14, 15) for den i det mindste tilnærmelsesvis i samme retning som mate- 10 rialebanen gennem tørreapparatets behandlingsrum (11) førte friskluft er beliggende i behandlingsrummets (11) forreste del, medens der kun i dets bageste del findes én enkelt udstrømningsåbning for tørreluften. 15A drying apparatus for carrying out the method according to any one of claims 1 to 5, including a drying house (13) and means for controlling the material web (10) to be dried, through a treatment room (11) in the drying house. set (13), as well as means for drying by means of fresh air, circulated air and exhaust air, characterized in that the drying house (13) has a number of successively drying sections (17) of the material web arranged 5 for repeated blowing of the air on the material web and for relaying this air by means of blow nozzles, nozzle groups or nozzle bodies (12) and between these flowing spaces, and that an inlet (14, 15) for the at least approximately in the same direction as the material path through the treatment room's treatment room (11) The supplied fresh air is located in the front part of the treatment room (11), while only a single outlet opening for the drying air exists in its rear part. 15 7. Tørreapparat ifølge krav 6, kendetegnet ved, at indløbet for friskluft til behandlingsrummet (11) er dannet af en slids (14) til indføring af materialebanen (10) i tørrehuset (13). 20Drying apparatus according to claim 6, characterized in that the inlet for fresh air to the treatment room (11) is formed by a slot (14) for introducing the material web (10) into the drying house (13). 20 8. Tørreapparat ifølge krav 6, kendetegnet ved, at der til tilførsel af friskluften fortil i tørrehuset (13) findes en særskilt indgangsåbning (15) for friskluften. 25Drying apparatus according to claim 6, characterized in that a separate inlet opening (15) for the fresh air is provided for supplying the fresh air to the front of the drying house (13). 25 9* Tørreapparat ifølge krav 6, 7 eller 8, kende tegnet ved, at der i behandlingsrummet (11) er anbragt blæsere (22) til cirkulering af tørreluften.9 * Dryer according to claim 6, 7 or 8, characterized in that fans (22) for circulating the drying air are arranged in the treatment room (11). 10. Tørreapparat ifølge krav 6, 7 eller 8, kende- 30 tegnet ved, at der til bortledning af cirkulationsluften fra materialebanen (10) og til denne lufts næste tilførsel til materialebanen på tørrehusets (13) yderside findes særskilte forbindelsesrør (16) med hver sin blæser (22). 35Drying apparatus according to claim 6, 7 or 8, characterized in that separate connecting pipes (16) with each connecting pipe (16) are provided for draining the circulating air from the material web (10) and to the next supply of this air to the material web (13). its fan (22). 35 11. Tørreapparat ifølge et vilkårligt af kravene 6 til 10, kendetegnet ved, at et udløb (23) for af- DK 161540B gangsluft fra behandlingsrummet (11) er placeret i den sidste tørresektion (17). !Drying apparatus according to any of claims 6 to 10, characterized in that an outlet (23) for exhaust air from the treatment room (11) is located in the last drying section (17). ! 12. Tørreapparat ifølge et vilkårligt af kravene 6 til 5 10, kendetegnet ved, at udløbet (23) for af gangsluft fra behandlingsrummet (11) er beliggende før den sidste tørresektion (17). 10 15 20 25 30 35Drying apparatus according to any one of claims 6 to 5, characterized in that the outlet (23) for running air from the treatment room (11) is located before the last drying section (17). 10 15 20 25 30 35
DK177984A 1983-04-05 1984-04-04 METHOD AND APPARATUS FOR DRYING A MATERIAL COURSE DURING ITS PROCEDURE DK161540C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19833312226 DE3312226A1 (en) 1983-04-05 1983-04-05 ARRANGEMENT FOR HEAT TREATMENT OF CONTINUOUS PRODUCTS
DE3312226 1983-04-05

Publications (4)

Publication Number Publication Date
DK177984D0 DK177984D0 (en) 1984-04-04
DK177984A DK177984A (en) 1984-10-06
DK161540B true DK161540B (en) 1991-07-15
DK161540C DK161540C (en) 1991-12-23

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EP (1) EP0132498B2 (en)
AT (1) ATE44412T1 (en)
DE (2) DE3312226A1 (en)
DK (1) DK161540C (en)
ES (1) ES531291A0 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9004823U1 (en) * 1990-04-27 1991-08-29 Kiersch, Walter, 2000 Wedel, De
DE4026106C2 (en) * 1990-08-17 1995-04-13 Monforts Gmbh & Co A Heat treatment machine
NL9300199A (en) * 1993-02-01 1994-09-01 Stork Contiweb Dryer with short restart.
DE10333483B4 (en) * 2003-07-22 2008-11-27 Moenus Textilmaschinen Gmbh Process for heat treatment of a web and treatment device
DE102006011466A1 (en) * 2006-03-13 2007-09-20 Brückner Trockentechnik GmbH & Co. KG Apparatus and method for heat treatment of textile webs
DE102010033033B3 (en) * 2010-08-02 2012-01-05 A. Monforts Textilmaschinen Gmbh & Co. Kg Device for heat treatment of a textile web

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3678596A (en) * 1969-11-28 1972-07-25 Kazunori Kubo Continuous slurry dryer
DE2443395B2 (en) * 1974-09-11 1978-09-28 Lindauer Dornier Gesellschaft Mbh, 8990 Lindau Device for the heat treatment of flat material webs by means of a flowing medium in a circulatory process
DE3012880A1 (en) * 1980-04-02 1981-10-15 Babcock Textilmaschinen Kg (Gmbh & Co), 2105 Seevetal Textile web drying chamber - has additional cold air entering in counterflow with discharged hot air through heat exchanger at top
DE3104556A1 (en) * 1980-12-03 1982-08-26 Brückner Trockentechnik GmbH & Co KG, 7250 Leonberg DEVICE FOR THE HEAT TREATMENT OF RAILWAY GOODS

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DK177984A (en) 1984-10-06
DK177984D0 (en) 1984-04-04
DE3312226A1 (en) 1984-10-11
DK161540C (en) 1991-12-23
EP0132498A2 (en) 1985-02-13
DE3478872D1 (en) 1989-08-10
EP0132498B1 (en) 1989-07-05
ES8501518A1 (en) 1984-12-01
EP0132498A3 (en) 1985-05-02
ES531291A0 (en) 1984-12-01
ATE44412T1 (en) 1989-07-15
EP0132498B2 (en) 1994-03-16

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