EP4185826A1 - Dryer for drying a panel-shaped product - Google Patents
Dryer for drying a panel-shaped productInfo
- Publication number
- EP4185826A1 EP4185826A1 EP21751976.8A EP21751976A EP4185826A1 EP 4185826 A1 EP4185826 A1 EP 4185826A1 EP 21751976 A EP21751976 A EP 21751976A EP 4185826 A1 EP4185826 A1 EP 4185826A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- dryer according
- nozzle boxes
- dryer
- baffle plates
- openings
- 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.)
- Withdrawn
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
- F26B21/022—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure with provisions for changing the drying gas flow pattern, e.g. by reversing gas flow, by moving the materials or objects through subsequent compartments, at least two of which have a different direction of gas flow
- F26B21/028—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure with provisions for changing the drying gas flow pattern, e.g. by reversing gas flow, by moving the materials or objects through subsequent compartments, at least two of which have a different direction of gas flow by air valves, movable baffles or nozzle arrangements
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- 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
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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
-
- 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
- F26B21/06—Controlling, e.g. regulating, parameters of gas supply
- F26B21/12—Velocity of flow; Quantity of flow, e.g. by varying fan speed, by modifying cross flow area
Definitions
- the invention relates to a dryer for drying goods in the form of strips or panels, in particular gypsum plasterboard or veneer panels, with several tiers, with an outer housing and an inner housing separated from the outer housing by a first and a second partition wall, with conveying devices for conveying the goods and with upper and lower nozzle boxes arranged transversely to the conveying direction, which extend across the width of the conveying devices between the partition walls, have an inflow opening at one end assigned to the first partition wall and are closed at the other end assigned to the second partition wall, and with nozzle openings for blowing out of drying air at least on one side of the goods passing through according to the preamble of patent claim 1.
- Such a dryer is known from DE 197 01 426 A1.
- the problem is dealt with of achieving uniform drying of the material to be dried, ie in particular the gypsum boards or veneer boards, over the entire width of the conveyor device.
- the nozzle boxes are wedge-shaped, so that the cross section decreases from the inflow side in the direction of the other end. This is intended to maintain a constant pressure over the entire length of the nozzle box.
- the wedge-shaped nozzle boxes are arranged in such a way that the distance between the boundary wall, which faces the plate passing through, increases from the inflow side towards the outflow side.
- the outflowing air is provided with a cross section that becomes larger in accordance with the increasing volume.
- the nozzles are designed as short pipe sections, the length of which increases the further away they are from the inflow side. As a result, the distance between the nozzle orifice and the sheet passing through is kept constant over the entire width.
- Non-uniform drying is observed to a particularly high degree in dryers which have several conveyor devices arranged one above the other in the manner of tiers and, for this reason, have a very compact structure.
- the cross-sectional dimensions of the individual nozzle boxes are very small in relation to their length.
- adjustable baffle or adjusting plates are provided, with which these openings of the nozzle boxes can be adjusted.
- floors with nozzle boxes that are oversupplied with drying circulating air within the dryer are partially closed on the opening side by the baffle plates, so that the opening area available for the inflow of air is reduced.
- the trays can be individually adjusted at each individual opening so that more even drying is achieved across all levels of the dryer. The trays can be readjusted if the desired uniform drying result has not yet been achieved.
- cover plates can be adjusted together for each floor. This can be achieved if the cover plates belonging to one floor are connected to one another by rods or struts.
- the cross sections of the inflow openings of the nozzle boxes can be changed from above by adjusting the cover plates.
- the cover plates can be fixed, in particular latched, at predetermined positions. Positions that have been set can then be easily restored even after a cleaning operation in which they were removed.
- the cover plates can be adjusted electrically, in particular with stepper or piezo motors.
- Motorized adjustment means allow the blind plates to be adjusted easily without the operating personnel having to adjust them manually.
- the cover plates can be readjusted at any time. When fully open, the cover plates do not prevent cleaning of the nozzle bases, for example with compressed air or water. It also serves to facilitate the adjustability of the cover plates if openings or doors are provided in the outer housing, from which the cover plates can be mechanically adjusted.
- gears are advantageously provided, by means of which either individual baffles or a plurality of baffles each Floor can be adjusted together. By means of a transmission gear, the effort required to adjust the cover plates can be reduced.
- a particularly good effect of the baffle plates is achieved if there are sensors for measuring the temperature, humidity and/or drying effect of the drying air and the baffle plates can be adjusted, in particular by means of the motors, in such a way that the drying effect is evened out on all floors.
- the sensors are preferably part of a control or regulation system for adjusting the blind plates as a function of temperature and/or humidity, etc.
- the air flow in the nozzle boxes can be increased by up to 20% by raising the baffle plates and lowered by up to 20% by lowering the baffle plates.
- the adjustability compensates for flow differences in the air flows between the upper and lower nozzle boxes. Since the lower nozzle boxes have a stronger air flow, this must be throttled in them more than in the upper nozzle boxes.
- FIG. 2a shows a top view of the opening-side partition of a dryer according to the invention with openings of nozzle boxes, which are partially covered by adjusting plates, slightly enlarged compared to the illustration in FIG.
- FIG. 2b shows the partition wall equipped with the adjustment plates according to FIG. 2a in cross section
- 3a shows a further plan view of an arrangement of adjustment plates for upper and lower nozzle boxes, which are attached to a partition wall and can be adjusted together, and
- FIG. 3b shows the partition wall according to FIG. 3a equipped with the adjusting plates according to FIG. 3a in cross section.
- a well-known dryer (Fig. 1) consists, for example, of thirty or more construction boxes-like compartments lined up.
- a compartment measures 2.0 m to 2.5 m in the conveying direction and is 5.0 m to 6.0 m wide. It has a ceiling 1 and outer side walls 2, 3 forming the outer casing.
- a core area 7 is separated from a circulating air duct by an intermediate ceiling 4, a dividing wall 5 and a dividing wall 6 equipped with outlet openings, which can also be designed as a lattice frame.
- This consists of a horizontal channel 8 above the core area 7, a lateral vertical distribution channel 9 and a collecting channel 10 arranged essentially mirror-symmetrically on the opposite side of about 250 to 350 mm in tiers one above the other, arranged rollers 11, which are mounted on the partitions 5, 6.
- the rollers 11 can be driven at the same speed via chains (not shown); they form therefore a roller conveyor on each floor, which extends over the entire length of the dryer.
- nozzle boxes 14a, 14b are arranged in the spaces between adjacent rollers 11 and extend across the width of the roller conveyor.
- the boundary wall of the nozzle boxes 14a, 14b facing the transport plane is provided with nozzle openings (also not shown here) for blowing drying air onto the moving boards of the material to be dried, for example gypsum boards or veneer boards.
- One end of the nozzle boxes 14a, 14b is designed as an inflow opening in the partition wall 5, the other end 18 is closed.
- the nozzle boxes 14 a, 14 b are wedge-shaped, so that their cross section decreases steadily in the direction of the closed end 8 .
- an upper nozzle box 14a is mechanically connected to a nozzle box 14b directly below it in the area of the openings, so that they form a double box and, for example, have a common inflow opening.
- the nozzle boxes 14a, 14b have separate openings.
- the end at which the inflow opening is located fits snugly in a rectangular recess in the partition wall 5. It is immovably attached to the partition wall 5 and sealed all around by a collar.
- the horizontal duct 8 is divided into a suction space 21 and a pressure space 22 by a partition plate 20 shaped like steps.
- the suction chamber 21 is in open connection with the collecting channel 8, the pressure chamber 22 with the distribution channel 9.
- a free-running, housing-less, single-suction radial impeller 23 is accommodated , the drive shaft of which penetrates the ceiling 1 and is coupled to a drive 24 seated on the ceiling 1 .
- An opening in a horizontal region of the separating plate 20 corresponds to the suction funnel 25 of the radial impeller 23, so that the radial impeller 23 is connected to the suction chamber 21 on the suction side.
- inflow openings 26 of the nozzle boxes 14a, 14b are provided in the partition wall 6 (FIGS. 2a, 2b) according to the invention.
- the openings 26 are partially closed by adjusting plates 27 that can be lowered from above in order to reduce the inflow of warm drying air, particularly in the lower floors of the nozzle boxes 14a, 14b.
- the adjustable plates 27 are adjusted together for each floor. Flierzu they are connected to each other by a frame.
- the openings 26 of the upper and lower nozzle boxes 14a, 14b on each floor of the dryer are partially covered from above by interconnected adjusting plates 27a and 27b.
- the adjusting plates 27a, 27b are connected to one another by webs 28. Your adjustment range is determined by elongated holes 29 between the upper adjustment plates 27a.
- Mandrels 30 attached to the partition wall 5 protrude into the slots 29 to a limited extent.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Drying Of Solid Materials (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102020004454.9A DE102020004454A1 (en) | 2020-07-23 | 2020-07-23 | Dryer for drying a panel-shaped product |
PCT/EP2021/025278 WO2022017646A1 (en) | 2020-07-23 | 2021-07-23 | Dryer for drying a panel-shaped product |
Publications (1)
Publication Number | Publication Date |
---|---|
EP4185826A1 true EP4185826A1 (en) | 2023-05-31 |
Family
ID=77265048
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP21751976.8A Withdrawn EP4185826A1 (en) | 2020-07-23 | 2021-07-23 | Dryer for drying a panel-shaped product |
Country Status (9)
Country | Link |
---|---|
US (1) | US20230296317A1 (en) |
EP (1) | EP4185826A1 (en) |
JP (1) | JP2023534483A (en) |
KR (1) | KR20230043160A (en) |
CN (1) | CN116157640A (en) |
BR (1) | BR112023000865A2 (en) |
CA (1) | CA3186471A1 (en) |
DE (1) | DE102020004454A1 (en) |
WO (1) | WO2022017646A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN115339777A (en) * | 2022-08-25 | 2022-11-15 | 杭州永腾橡塑实业有限公司 | Plastic product mildew-proof storage equipment and storage process using same |
CN115540561A (en) * | 2022-10-13 | 2022-12-30 | 中国新型建材设计研究院有限公司 | Vertically and horizontally combined gypsum board dryer |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3151074A1 (en) * | 1981-12-23 | 1983-07-28 | A. Monforts GmbH & Co, 4050 Mönchengladbach | "HOT TREATMENT MACHINE" |
US4523391A (en) | 1982-09-27 | 1985-06-18 | Donald P. Smith | High efficiency impingement heating and cooling apparatus |
DE4331496C2 (en) * | 1992-10-07 | 1998-03-19 | Monforts Gmbh & Co A | Flat nozzle system |
DE19701426C2 (en) * | 1997-01-17 | 2002-07-11 | Babcock Bsh Gmbh | Dryer for band or plate-shaped goods |
DE19922165C2 (en) | 1999-05-12 | 2001-08-30 | Babcock Bsh Gmbh | Dryer for band or plate-shaped goods |
DE102009059822B4 (en) | 2009-12-21 | 2015-12-10 | Grenzebach Bsh Gmbh | Method and apparatus for drying plasterboard |
-
2020
- 2020-07-23 DE DE102020004454.9A patent/DE102020004454A1/en not_active Withdrawn
-
2021
- 2021-07-23 BR BR112023000865A patent/BR112023000865A2/en unknown
- 2021-07-23 CA CA3186471A patent/CA3186471A1/en active Pending
- 2021-07-23 EP EP21751976.8A patent/EP4185826A1/en not_active Withdrawn
- 2021-07-23 KR KR1020237006209A patent/KR20230043160A/en not_active Application Discontinuation
- 2021-07-23 JP JP2023502964A patent/JP2023534483A/en not_active Abandoned
- 2021-07-23 CN CN202180059762.7A patent/CN116157640A/en not_active Withdrawn
- 2021-07-23 WO PCT/EP2021/025278 patent/WO2022017646A1/en active Application Filing
- 2021-07-23 US US18/017,219 patent/US20230296317A1/en active Pending
Also Published As
Publication number | Publication date |
---|---|
JP2023534483A (en) | 2023-08-09 |
DE102020004454A1 (en) | 2022-01-27 |
US20230296317A1 (en) | 2023-09-21 |
WO2022017646A1 (en) | 2022-01-27 |
KR20230043160A (en) | 2023-03-30 |
CN116157640A (en) | 2023-05-23 |
CA3186471A1 (en) | 2022-01-27 |
BR112023000865A2 (en) | 2023-02-07 |
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