EP0969259B1 - Sécheur à circulation d'air - Google Patents

Sécheur à circulation d'air Download PDF

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Publication number
EP0969259B1
EP0969259B1 EP99111834A EP99111834A EP0969259B1 EP 0969259 B1 EP0969259 B1 EP 0969259B1 EP 99111834 A EP99111834 A EP 99111834A EP 99111834 A EP99111834 A EP 99111834A EP 0969259 B1 EP0969259 B1 EP 0969259B1
Authority
EP
European Patent Office
Prior art keywords
compartment
bypass
air circulation
opening
distribution
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
EP99111834A
Other languages
German (de)
English (en)
Other versions
EP0969259A2 (fr
EP0969259A3 (fr
Inventor
Manfred Dipl.-Ing. Föhlisch
Marc-Aurel Dipl.-Ing. Voth
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.)
Moenus Textilmaschinen GmbH
Original Assignee
BTM Textilmaschinen 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
Priority claimed from DE1998129134 external-priority patent/DE19829134A1/de
Priority claimed from DE1999115923 external-priority patent/DE19915923C2/de
Application filed by BTM Textilmaschinen GmbH filed Critical BTM Textilmaschinen GmbH
Publication of EP0969259A2 publication Critical patent/EP0969259A2/fr
Publication of EP0969259A3 publication Critical patent/EP0969259A3/fr
Application granted granted Critical
Publication of EP0969259B1 publication Critical patent/EP0969259B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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

Definitions

  • the invention relates to a circulating air dryer according to the preamble of Claim 1.
  • Such a circulating air dryer is known from DE-A-40 33 63 known.
  • DE-A 40 33 637 describes a bypass valve as prior art, through which a circulating air flow with closed regulating flaps in the nozzle bodies, also called nozzle boxes, can be directed past the nozzle bodies.
  • distribution elements for an adjustable Treatment agent flow known in the nozzle body or in the bypass openings.
  • the distribution elements are at the inlet for the circulating air on the upper nozzle body or on lower nozzle body arranged.
  • the distribution organs can, depending on the position Close the bypass openings or the inflow openings.
  • the bypass opening is at the level of the distribution chamber with the Pressure chamber connecting opening and connects the distribution chamber with a backflow space above the upper nozzle boxes.
  • bypass position i.e. in a horizontal position, it protrudes into the area of a Top edge of the baffle. In this area, turbulence arises, which too an uneven flow to the bypass opening and the risk of Adjust the bypass flap. Part of the treatment agent flow will between the baffle plate and the bypass flap to the nozzle boxes. to Prevention of contact of hot treatment agent with the web this places high demands on the tightness of the closed Distribution flaps of the nozzle boxes provided.
  • the object of the invention is a circulating air dryer according to the preamble of Claim 1 to develop so that the turbulence on the bypass valve can be reduced or avoided and thus safe bypass operation is guaranteed.
  • bypass valve instead of a bypass flap rotatably mounted in the center, one can be rotated off-center stored bypass valve provided.
  • the bypass valve has an off-center arranged shaft on that the bypass valve in a longer and in one shorter leg divides.
  • the shaft of the bypass valve is in the lower half of the Bypass opening arranged.
  • the length of the longer leg corresponds at least the distance between the shaft and the top edge of the Deflection plate.
  • the shaft of the bypass valve is rotatably supported at its ends and with means for Rotation of the shaft and thus for rotating the bypass flap about an axis of rotation of the Shaft.
  • the bypass valve can be provided with means by which the Bypass valve is rotatable about an eccentrically arranged axis of rotation.
  • Essential is the off-center position of the axis of rotation.
  • bypass flap In bypass operation, the bypass flap is turned so far that the end of the longer leg ends with the upper edge of the baffle (Byp motherboard).
  • the treatment agent flows out of the pressure chamber along the Bypass valve in the backflow chamber.
  • the bypass flap closes the area the distribution chamber into which the supply air openings of the nozzle boxes open the treatment agent flow.
  • the hot treatment agent is from the Material web kept away, i.e. safe bypass operation is guaranteed.
  • Another advantage of the negative pressure generated in the distribution space is that the Bypass valve does not have to be sealed on its contact edge on the sheet.
  • bypass flap e.g. when the web is at a standstill, in the bypass position rotated, the pressure of the treatment agent in the Nozzle boxes and thus dismantled on the web. Bypass operation continues faster.
  • the bypass valve is highly effective.
  • a ratio of the openings of the flow section to the suction section of the Bypass opening from 2.5 to 5 to 1 according to claim 2 provides the generation of a Vacuum in the distribution chamber in front of the nozzle boxes.
  • An arrangement of the bypass valve in normal operation at an acute angle to Vertical, with its upper end offset from the distribution chamber is equalizes the flow cross section in the area of the deflection from the Pressure chamber through the opening in the distribution chamber and thus improves the Flow of treatment agent.
  • the bypass flap also acts higher flow pressure, which simplifies safe closing in normal operation.
  • the acute angle to the vertical can be 10 to 40 °.
  • the shaft and thus the axis of rotation of the bypass valve is higher arranged as the upper edge of the baffle.
  • Bypass valve arranged at an acute angle to the horizontal, being her front end facing down. This has the advantage that when closing the Bypass valve closing by the flow pressure of the treatment agent is supported as soon as the bypass flap has exceeded the horizontal position.
  • the acute angle to the horizontal can be 10 to 40 °.
  • Stops with spring plates at the top and bottom of the bypass opening according to claim 5 ensures safe closing in normal operation.
  • the bypass flap is pressed against the spring plates by the flow pressure.
  • Figure 1 shows the cross section through a field of a circulating air dryer with a Bypass valve in normal position.
  • Figure 2 corresponds to Figure 1, with the bypass valve is shown in the bypass position.
  • the flow directions of the treatment agent are represented by arrows.
  • Figure 3 shows an enlarged view of the bypass valve in the bypass position.
  • a circulating air dryer according to the invention has several in the transport direction consecutive fields, for example six fields and one Transport device for a web 1, namely with a plane tenter a tension chain 2 leading horizontally through the fields of the circulating air dryer.
  • the circulating air dryer has a cuboid, insulated housing with side Housing walls 3, 4, a housing base 5 and a housing cover 6 Mistake.
  • the fields are separated by partitions not shown in the drawing Openings for the web 1 and the tension chain 2 and possibly with flaps, separated from each other.
  • each field there is a recirculation device with at least one above and at least one nozzle box 7 arranged below the web 1 a circulating air fan 8, a suction chamber 9 on the suction side of the Air circulation fan 8 and a supply air chamber 10 on the pressure side of the Air circulation fan 8 arranged.
  • a circulating air fan 8 In this example there are two upper ones in each field and two lower nozzle boxes 7 arranged one behind the other in the transport direction.
  • the Nozzle boxes 7 extend at least over the maximum length Web width and about 70% of the width of the circulating air dryer.
  • the nozzle boxes 7 are designed as rectangular metal boxes. You point evenly distributed pipe sections 11 for backflow of the exhaust air, which the Web 1 facing walls 12 with the opposite walls 13 of the Nozzle boxes 7 connects.
  • the walls 12 of the web facing 1 Nozzle boxes 7 are circular, not shown in detail with the Pipe sections 11 provided discharge openings. Feed openings 14 the nozzle boxes 7 of a field are all on one side, namely in this example on the side facing the housing wall 3, and extend almost over the entire height and width of the nozzle boxes 7. On this page the nozzle boxes 7 protrude somewhat beyond the tension chain 2.
  • the housing cover 6 Starting from the housing cover 6, one extends to the housing wall 3 facing ends of the nozzle boxes 7 which have the feed openings 14 arranged, parallel to the housing wall 3 intermediate wall 15 to Housing base 5. It separates the supply air chamber 10 from the interior of the field from. One of the opposite one abuts this intermediate wall 15 Housing wall 4 outgoing intermediate floor 16, which the suction chamber 9 from Separates interior. The height of the suction chamber 9 is about a quarter of the Total height.
  • the housing cover 6, the housing wall 4 and the Intermediate floor 16 limited backflow spaces 17, 18, 19 free.
  • Below the lateral backflow space 19 is at least one filter 20 in the intermediate floor 16 admitted. Through the filter 20 are the return flow spaces open to each other 17, 18, 19 with the through the intermediate floor 16 and the housing base 5th limited suction chambers 9 connected.
  • a heater on the housing wall 4 here a Burner 21, for example a gas burner, is arranged.
  • the one as a radial fan trained recirculation fan 8 is on the opposite burner 21 Side, also in the middle of the field length at the end of the suction chamber 9 in the Supply air chamber 10 arranged so that its pressure side is in the supply air chamber 10 located. Its suction side is through an opening 22 in the intermediate wall 15 with the Suction chamber 9 connected.
  • the intermediate floor 16 is to improve the Inflow of the air circulation fan 8 angled upwards before it is directly above the opening 22 abuts the intermediate wall 15.
  • baffle plate 24 forming an intermediate wall arranged. At least in the upper area parallel to the housing wall 3 Running baffle 24 divides the supply air chamber 10 into two large ones Areas of the dryer height extending chambers in a Pressure chamber 25 and a distribution chamber 26. This is the Pressure side of the air circulation fan 8 in the pressure chamber 25.
  • the deflection plate 24 ends at a distance from the housing cover 6, whereby in the through the baffle 24th formed partition at the end opposite the air circulation fan 8 the pressure chamber 25, an opening 27 remains free through which the distribution chamber 26 is connected to the pressure chamber 25. Open into the distribution chamber 26 successively from top to bottom, the feed openings 14 of the top Nozzle boxes 7 and those of the lower nozzle boxes 7.
  • the horizontal width of the Pressure chamber 25 in the upper area, the vertical height of the opening 27 and the horizontal width of the distribution chamber 26 in the upper region are the same size.
  • the baffle plate forming the intermediate wall has, beginning at the height of the Material web 1 has a tapering the distribution chamber 26, which the Width of the distribution chamber 26 approximately at the center of the feed openings 14 on the Half reduced so that it corresponds to the height of the feed opening 14.
  • the end of the baffle 24 is on the intermediate wall 15 on this Fixed height. Behind the feed openings 14 of the nozzle boxes 7 are in the Nozzle boxes 7 distribution flaps 28 are provided.
  • the intermediate wall 15 has at least one above the upper nozzle boxes 7 Bypass opening 29.
  • the bypass opening 29 connects the distribution chamber 26 with the return flow chamber 17 located above the upper nozzle boxes 7 extends from the upper nozzle boxes 7 to the housing cover 6.
  • a bypass flap 30 is arranged in the bypass opening 29.
  • the bypass valve 30 has an eccentrically arranged shaft 31 and thereby a longer one Leg 32 and a shorter leg 33.
  • the shaft 31 is in the lower Half of the bypass opening 29 arranged so that the longer in the normal position Leg 32 upwards and the shorter leg 33 downwards and the Bypass flap 30 closes the bypass opening 29.
  • the length of the longer leg 32 corresponds at least to the distance between the shaft 31 and an upper edge 34 of the deflection plate 24.
  • the shaft 31 extends across the entire width of the field and is on both Sides pivoted.
  • the two legs 32 and 33 are on the shaft 31 attached. You can, as shown in Figure 3, from a common, rectangular sheet 35 exist that 31 bends for receiving the shaft having.
  • the legs 32 and 33 of the bypass valve 30 can also each have one the shaft 31 attached rectangular sheet.
  • the bypass opening 29 is in one through the bypass flap 30 divided upper flow section 37 and a lower suction section 38.
  • the ratio of the openings of the flow section 27 and the Suction section 38 is 2.5 to 5 to 1. It is determined by the ratio of Lengths of the legs 32 and 33 and any additional sheet metal determined. In this For example, the ratio of the leg lengths is approximately 3.2 to 1.
  • bypass opening 29 and the bypass flap 30 run in one acute angle to the vertical from 10 to 40 °, for example from 26 °, the upper End of the bypass valve 30, i.e. of her longer leg 31, for Distribution chamber 26 is arranged offset.
  • the shaft 31 of the bypass valve 30 is located above the upper edge 34 of the Deflection plate 24, whereby the bypass valve 30 in the bypass operation in one acute angle is arranged down to the horizontal from 10 to 40 °.
  • the Angle can also be 26 °, so that normal position and bypass position form a right angle to each other.
  • the deflection plate 24 projects with its upper edge 34 over the upper nozzle boxes 7.
  • upper edge of the upper nozzle boxes 7 there is an additional one Sheet metal, namely a spacer sheet 39 which ends approximately with the upper edge 34, attached.
  • the profile of the Spring plates 42, 43 can have the shape of a triangle, one side only a small part is made of sheet metal and the rest of the page is Travel forms.
  • the arrangement of the air circulation fan over the field length is variable; he can in the middle, be arranged at the beginning or end of the field.
  • the treatment agent i.e. H. the drying air through which Nozzle boxes 7 fed via the outflow openings of the web 1.
  • the Drying air absorbs the heat of the web 1 while releasing its heat and flows as exhaust air through the pipe sections 11 through the nozzle boxes 7 and to the side of the nozzle boxes 7 into the return flow spaces 17, 18, 19.
  • Part of the exhaust air of a field for example with counterflow in the circulating air dryer, into the previous field and a corresponding part of the exhaust air from the one behind Field directed into the backflow spaces 17, 18 or 19 of this field.
  • bypass opening 29 and the bypass flap 30 equalizes the flow of the treatment path from the pressure chamber 25 through the opening 27 into the distribution chamber 26.
  • the bypass valve 30 is thereby pressed against the spring plates 42 and 43 by the flow pressure.
  • the bypass flap 30 is rotated into the bypass position.
  • the Treatment agent flows evenly out of the pressure chamber 25 through the opening 27 in the baffle plate 24, along the bypass flap 30, through the Flow section 37 of the bypass opening 29 into the return flow space 17 the flow pressure of the treatment agent is in the suction section 38 Bypass valve 30 and in the distribution chamber 26 below generated a negative pressure.
  • the distribution flaps 28 are not closed necessary.
  • the pressure is within a very short time, for example of 1 second of the treatment agent in the nozzle boxes and on the web.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Drying Of Solid Materials (AREA)
  • Paper (AREA)

Claims (5)

  1. Séchoir à circulation d'air ayant un ou plusieurs champs disposés les uns derrière les autres, comprenant un dispositif de transport d'une nappe (1) de tissu horizontal et disposé dans les champs, comprenant dans chaque champ un dispositif de circulation d'air ayant au moins un caisson (7) à buses disposés en dessus de la nappe de tissu et au moins un caisson (7) à buses disposés en dessous de la nappe de tissu, comprenant un ventilateur (8) de re-circulation d'air, comprenant une chambre (9) d'aspiration, le côté aspiration du ventilateur (8) de re-circulation d'air communiquant avec la chambre (9) d'aspiration, et comprenant une chambre (10) d'entrée d'air, la chambre (10) d'entrée d'air se trouvant d'un côté de la nappe (1) de tissu, le ventilateur (8) de re-circulation d'air étant disposé à l'extrémité inférieure de la chambre (10) d'entrée d'air, la chambre (10) d'entrée d'air étant subdivisée par une tôle (24) de déviation disposée sensiblement verticalement en une chambre (25) de refoulement et en une chambre (26) de répartition, le côté refoulement du ventilateur (8) de re-circulation d'air communiquant avec la chambre (25) de refoulement, la tôle (24) de déviation dégageant, à l'extrémité opposée au ventilateur (18) de re-circulation d'air de la chambre (25) de refoulement, une ouverture, par laquelle la chambre (26) de répartition communique avec la chambre (25) de refoulement, des ouvertures d'entrée d'air du caisson (7) à buses débouchant dans la chambre (26) de répartition, une ouverture (29) de dérivation, se trouvant au niveau de l'ouverture mettant la chambre (26) de répartition en communication avec la chambre (25) de refoulement, faisant communiquer la chambre (26) de répartition avec un espace (17) de reflux au dessus du caisson (7) à buses et pouvant être fermé par un volet (30) de dérivation à l'aide d'un arbre (31), caractérisé en ce que l'arbre (31) du volet (30) de dérivation est disposé dans la moitié inférieure de l'ouverture (29) de dérivation et le volet (30) de dérivation a une branche (32) longue et une branche (33) courte, la longueur de la branche (32) longue correspondant au moins à la distance entre l'arbre (31) et un bord (34) supérieur de la tôle (24) de déviation.
  2. Séchoir à circulation d'air suivant la revendication 1, caractérisé en ce que lorsque le volet (30) de dérivation est en position de dérivation, l'ouverture (29) de dérivation est subdivisée en une partie (37) de passage communiquant avec la chambre (25) de refoulement et en une partie (38) d'aspiration communiquant avec la chambre (26) de répartition et le rapport des ouvertures de la partie (37) de passage à la partie (38) d'aspiration est compris entre 2,5 et 5.
  3. Séchoir à circulation d'air suivant la revendication 1 ou 2, caractérisé en ce qu'en fonctionnement normal le volet (30) de dérivation fait un angle aigu avec la verticale et est décalé par son extrémité supérieure par rapport à la chambre (26) de répartition.
  4. Séchoir à circulation d'air suivant l'une des revendications 1 à 3, caractérisé en ce que l'arbre (31) du volet (30) de dérivation est disposé plus haut que le bord (34) supérieur de la tôle (24) de renvoi.
  5. Séchoir à circulation d'air suivant l'une des revendications 1 à 4, caractérisé en ce qu'aux extrémités supérieure et inférieure de l'ouverture (29) de dérivation sont placées des butées (40, 41) ayant des tôles (42, 43) élastiques.
EP99111834A 1998-06-30 1999-06-19 Sécheur à circulation d'air Expired - Lifetime EP0969259B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE19829134 1998-06-30
DE1998129134 DE19829134A1 (de) 1998-06-30 1998-06-30 Umlufttrockner
DE1999115923 DE19915923C2 (de) 1999-04-09 1999-04-09 Umlufttrockner
DE19915923 1999-04-09

Publications (3)

Publication Number Publication Date
EP0969259A2 EP0969259A2 (fr) 2000-01-05
EP0969259A3 EP0969259A3 (fr) 2001-09-12
EP0969259B1 true EP0969259B1 (fr) 2004-09-15

Family

ID=26047126

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99111834A Expired - Lifetime EP0969259B1 (fr) 1998-06-30 1999-06-19 Sécheur à circulation d'air

Country Status (3)

Country Link
EP (1) EP0969259B1 (fr)
DE (1) DE59910491D1 (fr)
PT (1) PT969259E (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105020997B (zh) * 2015-08-25 2017-06-30 苏州星原纺织有限公司 一种双重纺织烘干装置
CN108662893B (zh) * 2018-05-21 2020-04-21 安徽省好再来食品有限公司 一种封鳊鱼加工过程中的风干和拍打装置
CN111495713A (zh) * 2020-04-30 2020-08-07 无锡市绿色热处理设备有限公司 车用蜂窝陶瓷催化剂载体处理用干燥导风系统
CN112981930B (zh) * 2021-02-24 2023-04-25 东莞万盈智能科技有限公司 一种具备烘干结构的无纺布分切设备

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD208210A1 (de) 1981-12-17 1984-03-28 Rudolf Petschner Vorrichtung zur verhinderung der uebertrocknung von stoffbahnen
DE3336331C2 (de) 1983-10-06 1985-12-05 A. Monforts GmbH & Co, 4050 Mönchengladbach Konvektionstrocken- und/oder -fixiermaschine
DE4033637A1 (de) 1990-10-23 1992-04-30 Babcock Textilmasch Vorrichtung zur umluftmengenregelung bei waermebehandlungsvorrichtungen, wie trocknern und dgl.
DE19829134A1 (de) 1998-06-30 2000-01-05 Babcock Textilmasch Umlufttrockner

Also Published As

Publication number Publication date
DE59910491D1 (de) 2004-10-21
EP0969259A2 (fr) 2000-01-05
PT969259E (pt) 2004-12-31
EP0969259A3 (fr) 2001-09-12

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