WO2002098772A1 - Verfahren und vorrichtung zur pneumatischen förderung von geschnittenen glasfasern - Google Patents
Verfahren und vorrichtung zur pneumatischen förderung von geschnittenen glasfasern Download PDFInfo
- Publication number
- WO2002098772A1 WO2002098772A1 PCT/EP2002/005706 EP0205706W WO02098772A1 WO 2002098772 A1 WO2002098772 A1 WO 2002098772A1 EP 0205706 W EP0205706 W EP 0205706W WO 02098772 A1 WO02098772 A1 WO 02098772A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- delivery
- conveying
- shut
- pressure
- pipe
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
- B65G53/04—Conveying materials in bulk pneumatically through pipes or tubes; Air slides
- B65G53/28—Systems utilising a combination of gas pressure and suction
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
- B65G53/34—Details
- B65G53/52—Adaptations of pipes or tubes
- B65G53/521—Adaptations of pipes or tubes means for preventing the accumulation or for removal of deposits
Definitions
- the invention relates to a method and a device for the pneumatic conveying of finely divided bulk materials, in particular glass fibers.
- Glass fibers are used in large quantities in plastics production - especially for the production of glass fiber reinforced plastics. A considerable effort is required for the handling of the glass fibers, in particular the transport and the loading of the production plants. The space required for stocking the glass fiber containers is considerable.
- Fibers are usually processed in the form of fiber bundles.
- the fiber bundles consist, for example, of 2000 parallel individual fibers with a typical length of approximately 4.5 mm.
- Conveying techniques currently used for batch-wise loading / filling of production plants with cut glass fibers are elevator systems, industrial trucks such as forklifts or crane systems.
- Continuous funding can e.g. B. via bucket elevators, continuous conveyors, vibrating or vibrating troughs or conveyor belts.
- print transmitters i.e. a print template for posting
- the pressure transmitter is blocked in its outlet area by the cut glass fibers.
- Processes for the slow conveyance of bulk goods that are difficult or gentle on the material such as suction conveyance using secondary air valves or pressure conveyance with secondary gas-carrying secondary lines with an elastic inner tube, change the cut glass fibers to high conveying speeds due to shocks and friction between the glass fibers among themselves and between glass fibers and the conveyor system - e.g. B. - Pipe too strong. This causes the fiber bundles to dissolve.
- the object of the present invention is to provide an apparatus and a method for the pneumatic conveying of cut glass fibers which is to a great extent reliable, low-maintenance and easy to use and which is gentle on the material.
- a device for the pneumatic conveying of finely divided bulk goods, in particular glass fibers which has at least one feed container, a pneumatic conveying tube with a first section and a second section, a suction-feeding device for the
- Production gas connected to the end of the first section of the production pipe a pressure delivery device for the delivery gas, a delivery gas secondary line, several shut-off valves between the pneumatic delivery pipe and the delivery gas secondary line, and a delivery point, characterized in that the delivery pipe has an increased number of shut-off valves in the locations that tend to become blocked, which prevent the occurrence of blockages.
- the pneumatic delivery pipe is preferably a pipe with
- the conveying tube on the inner wall particularly preferably has a hardness of 50 to 90 HRC, particularly preferably of 60 to 65 HRC.
- the delivery pipe is preferably composed of different segments which are connected, for example, via flange connections. To ensure that the fibers are conveyed gently, care must be taken to ensure that the conveying pipe is laid in such a way that there is no protrusion or recess.
- Any machine for generating negative pressure for gases is suitable as a suction conveyor.
- a blower or a fan is preferably used.
- Both the first and the second section of the pneumatic delivery pipe and the delivery gas secondary line are preferably connected via a pipe to a connection for delivery gas which is available with the desired admission pressure.
- Any machine for generating positive pressure for gases is suitable as a pressure delivery device.
- a blower, a fan, a compressor or a compressor is preferably used.
- any simple pipeline which can also preferably be composed of different segments, is suitable as a feed gas secondary line.
- the secondary line is closed or closable at the end so that pressure can build up in it.
- the delivery pipe and the delivery gas bypass are connected to one another, for example, by means of short pipe sections.
- the pipe pieces carry the shut-off valves.
- the delivery point can, for example, only be used for storage or dosing purposes or can already be the apparatus for further processing of the fine-particle bulk material itself.
- the delivery point can, for example, only be used for storage or dosing purposes or can already be the apparatus for further processing of the fine-particle bulk material itself.
- all containers such as containers, BIG-BAGs (tissue containers), silos, bunkers,
- Storage rooms, boilers, trailers for trucks, reaction or processing boilers, extruders or other containers and apparatus are suitable.
- the shut-off fittings are designed in two stages, the first stage, which is connected to the delivery pipe, being designed to prevent kickback against increased pressure in the delivery pipe.
- shut-off valves are designed in two stages, the second stage, which is connected to the feed gas bypass, as an inlet valve with pressure presetting for the feed gas from the
- the delivery pipe is connected to the delivery gas secondary line via a large number of shut-off valves at intervals of 200 mm to 2000 mm.
- the pressure delivery device is connected to the delivery gas secondary line so that it can be shut off. In a preferred embodiment of the device, the pressure delivery device is connected to the start of the second section of the delivery pipe so that it can be shut off.
- a shut-off valve in particular a pinch valve, is arranged between the first section of the delivery pipe and the second section of the delivery pipe.
- a shut-off valve in particular a pinch valve, is arranged between the feed container and the first section of the delivery pipe.
- Both the delivery point, the delivery point and the suction and pressure conveying device can be provided with a filter independently of one another to avoid contamination of the surroundings (with glass fiber dust).
- a filter independently of one another to avoid contamination of the surroundings (with glass fiber dust).
- self-cleaning filter devices used.
- the object is further achieved according to the invention by a method for the pneumatic conveying of finely divided bulk goods using a device which has at least one feed container, a pneumatic one
- Delivery pipe with a first section and a second section, a suction delivery device for the delivery gas, a pressure delivery device for the delivery gas, a delivery gas secondary line, a plurality of shut-off valves between the pneumatic delivery pipe and the delivery gas secondary line and a delivery point, characterized in that
- the first section of the delivery pipe is filled with a feed portion of the goods to be conveyed and delivery gas from a delivery container by means of suction conveying
- the material to be conveyed is conveyed from the first section of the conveying pipe by means of pressure promotion into the second section of the conveying pipe
- the portion of the conveyed material conveyed into the second section of the conveying pipe is conveyed by means of pressure conveying
- the feed gas secondary line being closed or closable at the end and the pressure delivery in the second section of the feed tube being operated with a constant amount of feed gas for the feed tube and feed gas secondary line.
- the method is preferably carried out such that the first step, i. H. the filling of the first section of the pneumatic delivery pipe is carried out when the second step, d. H. the pressure delivery of the material to be conveyed from the first section into the second section of the delivery pipe has been completed.
- the first step of a production cycle and the third step of the previous production cycle i.e. H. the pressure conveying of the conveyed goods in the second section of the conveyed goods to the delivery point are carried out simultaneously.
- a funding cycle is understood to mean the sequence of the three steps mentioned above.
- a variant of the method is preferred in which the occurrence of blockages is prevented in the locations of the delivery pipe which tend to become blocked by means of an increased number of shut-off valves by the shut-off valves installed at these points opening when pressure loss occurs and introducing conveying gas into the area of the blockage which is starting to occur ,
- the pressure in the delivery line rises before the onset of blockage.
- the pressure in the bypass line also rises until the shut-off valves behind the onset or blockage that has already started open and the incoming conveying gas maintains the conveyance of the material behind the onset or blockage that has already started.
- shut-off valves which are designed in two stages, the first stage, which is connected to the delivery pipe, to prevent kickback and closes when the pressure in the pneumatic delivery pipe is equal to or greater than the pressure in the feed gas bypass.
- shut-off valves are used, which are designed in two stages, the second stage, which is connected to the feed gas secondary line, being designed as an inlet valve with pressure presetting for the feed gas from the feed gas secondary line, with a Pressure is preset, which is greater than the pressure at the connection point in the delivery pipe when the delivery pipe is not clogged.
- the preset pressure is preferably 5-70% greater than the pressure at the corresponding point in the delivery pipe when the delivery pipe is not clogged, particularly preferably by 20-50%.
- a variant of the method in which the pressure in the second stage of the shut-off valves is preset to increase from valve to valve as seen in the conveying direction.
- a variant of the method is preferred in which a delivery pipe is used which is connected to the delivery gas secondary line via a large number of shut-off valves at intervals of 200 mm to 2000 mm.
- a variant of the method is preferred in which the material to be conveyed is cut glass fibers in fiber bundles.
- the typical length of the glass fiber is 3 to 6 mm, the diameter is in particular from 5 ⁇ m to 50 ⁇ m.
- a fiber bundle usually has a rectangular cross section of e.g. 1 mm high and 3 mm wide.
- Compressed air in particular dried compressed air, is preferably used as the conveying gas.
- Fig. 1 shows the device in schematic form
- FIG. 1 a system for the pneumatic conveying of cut glass fibers is shown schematically.
- the glass fibers are in the form of a flake of approx. 2000 fibers with a length of 4.5 mm and about 0.5 mm in diameter.
- the single fiber diameter is approx. 5 ⁇ m.
- the cut glass fibers to be conveyed are in the feed container 1. All taps are closed. In a first step, the taps 10 and 11 are opened and by means of the blower 3 a portion of about 150 kg of the cut glass fibers is sucked from the feed container 1 into the first section 2a of the pneumatic conveying tube 2 within 1 min. The taps 10 and 11 are closed.
- the taps 12, 13 and 15 are opened and the portion fed into the first section 2a of the delivery pipe 2 in the first step is cut
- Glass fibers are conveyed within 20 seconds by the conveying gas into the second section 2b of the conveying pipe 2 by means of drack conveying. Compressed air is used as the conveying gas. The pressure of the compressed air is built up by the fan 16. The cocks 12 and 15 are closed, cock 13 remains open in order to supply the feed gas secondary line 4 with compressed air.
- the tap 14 is opened.
- the portion of cut glass fibers conveyed into the second section 2b of the conveyor tube 2 in the second step is now required by the compressed air through the second section 2b of the conveyor tube 2 to the delivery point 8. Funding takes place within 2 minutes.
- the compressed air volume is set to 200 m3 / h under normal conditions, which corresponds to a gas empty pipe speed of approx. 5 m / s. Then tap 14 is closed.
- shut-off valves 6 open in the area of the first section 2a of the delivery pipe 2 via short pipe sections 5 and in the region of the second section 2b of the delivery pipe 2 are connected to the delivery gas secondary line 4 via short pipe sections 5 '. This maintains the feeding portion of the cut glass fibers behind the onset or occuring constipation. The incoming or occurring blockages are loosened and finally released by the incoming compressed air from the conveying gas secondary line 4.
- a curvature of the delivery pipe 2 is shown as an example, in which the risk of clogging is increased. Therefore, the number of shut-off valves 6 per pipe length is increased in area 9.
- the first step of the next funding cycle is already being carried out.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Air Transport Of Granular Materials (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA002449344A CA2449344A1 (en) | 2001-06-06 | 2002-05-24 | Method and device for pneumatic conveyance of cut glass fibers |
EP02745315A EP1399376B1 (de) | 2001-06-06 | 2002-05-24 | Verfahren und vorrichtung zur pneumatischen förderung von geschnittenen glasfasern |
JP2003501775A JP2004527430A (ja) | 2001-06-06 | 2002-05-24 | 切断されたガラス・ファイバーを圧送する方法およびそのための装置 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10127427A DE10127427A1 (de) | 2001-06-06 | 2001-06-06 | Verfahren und Vorrichtung zur pneumatischen Förderung von geschnittenen Glasfasern |
DE10127427.0 | 2001-06-06 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2002098772A1 true WO2002098772A1 (de) | 2002-12-12 |
Family
ID=7687356
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2002/005706 WO2002098772A1 (de) | 2001-06-06 | 2002-05-24 | Verfahren und vorrichtung zur pneumatischen förderung von geschnittenen glasfasern |
Country Status (8)
Country | Link |
---|---|
US (1) | US6786681B2 (de) |
EP (1) | EP1399376B1 (de) |
JP (1) | JP2004527430A (de) |
CN (2) | CN1269708C (de) |
CA (1) | CA2449344A1 (de) |
DE (1) | DE10127427A1 (de) |
ES (1) | ES2307766T3 (de) |
WO (1) | WO2002098772A1 (de) |
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DE10127427A1 (de) * | 2001-06-06 | 2002-12-12 | Bayer Ag | Verfahren und Vorrichtung zur pneumatischen Förderung von geschnittenen Glasfasern |
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US6936092B2 (en) * | 2003-03-19 | 2005-08-30 | Varco I/P, Inc. | Positive pressure drilled cuttings movement systems and methods |
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DE102004014059A1 (de) * | 2004-03-23 | 2005-10-13 | Bayer Ag | Vorrichtung und Verfahren zur pneumatischen Förderung von feinteiligen Schüttgütern |
DE102004014058A1 (de) * | 2004-03-23 | 2005-10-13 | Bayer Ag | Vorrichtung und Verfahren zur pneumatischen Förderung von feinteiligen Schüttgütern |
GB0409318D0 (en) * | 2004-04-27 | 2004-06-02 | Its Drilling Services Ltd | Material transportation apparatus and method |
DE102004026119A1 (de) * | 2004-05-15 | 2005-12-08 | Lanxess Deutschland Gmbh | Verfahren zur pneumatischen Förderung von Glasfasern |
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2001
- 2001-06-06 DE DE10127427A patent/DE10127427A1/de not_active Ceased
-
2002
- 2002-05-24 CN CNB028115163A patent/CN1269708C/zh not_active Expired - Fee Related
- 2002-05-24 CN CN2006100915631A patent/CN1868844B/zh not_active Expired - Fee Related
- 2002-05-24 ES ES02745315T patent/ES2307766T3/es not_active Expired - Lifetime
- 2002-05-24 CA CA002449344A patent/CA2449344A1/en not_active Abandoned
- 2002-05-24 JP JP2003501775A patent/JP2004527430A/ja active Pending
- 2002-05-24 EP EP02745315A patent/EP1399376B1/de not_active Expired - Lifetime
- 2002-05-24 WO PCT/EP2002/005706 patent/WO2002098772A1/de active IP Right Grant
- 2002-06-03 US US10/160,889 patent/US6786681B2/en not_active Expired - Lifetime
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
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US3304127A (en) * | 1965-08-20 | 1967-02-14 | Ma Tran Corp | Material handling apparatus |
US5240355A (en) * | 1992-05-22 | 1993-08-31 | Nol-Tec Systems, Inc. | Dense phase transporter pneumatic conveying system |
EP0692441A2 (de) * | 1994-07-15 | 1996-01-17 | MOTAN VERFAHRENSTECHNIK GMBH & CO. | Verfahren und Vorrichtung zum pneumatischen Fördern von Schüttgut |
US6106202A (en) * | 1998-05-04 | 2000-08-22 | Nol-Tec Systems, Inc. | Pneumatic conveying air assist line with air bleed |
Also Published As
Publication number | Publication date |
---|---|
CN1269708C (zh) | 2006-08-16 |
CN1868844B (zh) | 2010-09-01 |
DE10127427A1 (de) | 2002-12-12 |
ES2307766T3 (es) | 2008-12-01 |
EP1399376A1 (de) | 2004-03-24 |
CN1514796A (zh) | 2004-07-21 |
CA2449344A1 (en) | 2002-12-12 |
JP2004527430A (ja) | 2004-09-09 |
US20020187012A1 (en) | 2002-12-12 |
EP1399376B1 (de) | 2008-07-16 |
CN1868844A (zh) | 2006-11-29 |
US6786681B2 (en) | 2004-09-07 |
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