EP1731670A1 - Reinigungsvorrichtung, insbesondere für Papiermaschinen - Google Patents
Reinigungsvorrichtung, insbesondere für Papiermaschinen Download PDFInfo
- Publication number
- EP1731670A1 EP1731670A1 EP06425381A EP06425381A EP1731670A1 EP 1731670 A1 EP1731670 A1 EP 1731670A1 EP 06425381 A EP06425381 A EP 06425381A EP 06425381 A EP06425381 A EP 06425381A EP 1731670 A1 EP1731670 A1 EP 1731670A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- air
- chamber
- paper
- water
- case
- 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
Links
Images
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
- D21G3/00—Doctors
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
- D21G3/00—Doctors
- D21G3/04—Doctors for drying cylinders
Definitions
- the present invention relates to a cleaning apparatus, especially for paper production plants.
- the present invention is apt for use in the cleaning of air surrounding the plants for the production of tissue paper, that is, paper for disposable products of typically domestic use.
- the plants for the production of tissue paper are provided with a so-called "yankee or smooth" cylinder over which the paper ply in the course of formation is wound.
- the paper formed onto the smooth cylinder is subsequently fed to a reel for the collection of the finished product.
- the smooth cylinder is partially wrapped up by the paper ply along a path where the same ply is subjected to the formation operations.
- the formed paper ply is then detached from the outer surface of the yankee cylinder by suitable rakers (so-called detaching, crinkling and cleaning devices) interposed between the said ply and the cylinder.
- the rakers exhibit respective ends predisposed for detaching the paper ply from the cylinder, thereby allowing the same ply ro be removed from the surface of the smooth cylinder.
- Cleaning means are also known, located below the cylinder region, whose main function is that of intercepting and kneading paper portions dropped as a consequence of ply's breakings.
- the cleaning devices consist of a water dispenser located below separation wedges and predisposed for delivering a jet of water transversally to the drop direction of cellulose particles. In this way, the particles are moistened and, therefore, made heavier, to prevent them from spreading about in the environment.
- the water being sprayed, holding the cellulose particles therein, is stored in a suitable vessel located below the dispenser.
- the cleaning devices are unable to efficiently eliminate all the particles suspended in the air.
- the lighter cellulose particles are scattered in the ambient before being hit by the jet of water. Consequently, the surrounding air is not fully clean.
- the technical task of the present invention is to propose a cleaning apparatus for paper production plants which does not exhibit the above mentioned drawbacks.
- the object of the present invention is to provide a cleaning apparatus able to efficiently eliminate the cellulose particles entrained by the air.
- a further object of the present invention is a cleaning apparatus for paper production plants able to carry air to be cleaned along a predetermined path.
- numeral 1 indicates on the whole a cleaning apparatus, especially for plants 2 for the production of paper 3, according to the present invention.
- the apparatus 1 is advantageously used in plants for the production of tissue paper, that is, paper for any kind of disposable items.
- the plants 2, partly illustrated in Fig. 1, are made up of a smooth cylinder 2a for driving a sheet of paper 3 in the course of formation.
- the plant 2 is also provided with a series of rakers 2b of known type - which will not, therefore, illustrated in greater detail - predisposed for detaching the sheet of paper 3 formed by the outer surface of cylinder 2a.
- the cleaning apparatus 1 is housed below the indicated rakers 2b so as to result as much as possible close to the region of detachment of the paper 3 from cylinder 2a.
- the apparatus 1 comprises a storage case 4, having a substantially box-like shape and defining a chamber 5 therein.
- the storage case has preferably a substantially parallelepiped shape with rectangular plan.
- the case 4 may exhibit any shape suitable for any installation sites and according to various construction requirements.
- the case 4 has suction means 6 predisposed for sucking air surrounding the relevant plant 2 for the production of paper 3.
- the suction means 6, schematically illustrated in Fig. 2, can be made up of a common aspirator of known type and, therefore, not to be described and illustrated in greater detail.
- the suction means 6 are associated with the case 4 in correspondence of an outlet 4a formed in a top region of the same case 4.
- the case 4 is also provided with an inlet 4b consisting of a slit formed in a side wall and extending along the whole longitudinal development of the same case 4.
- the suction means 6 make it possible to convey air, through the inlet 4b, to the inside of the chamber 5, and to flow it outwardly therefrom through the outlet 4a.
- the apparatus 1 also exhibits filter means 7 housed in the chamber 5 and intended to retain solid impurities entrained by the sucked air, such as cellulose particles generated by the sheet of paper 3 during the detachment of the latter from the cylinder 2.
- the filter means 7 consist of a liquid, preferably water, contained in a lower region of the chamber, opposite to the outlet 4a.
- the water is distributed into the chamber 5 via a suitable introduction conduit 7a connected with a hydraulic circuit of the plant 2. Moreover, after a series of air filterings, the water is disposed through a discharge conduit 7b formed below the case 4.
- the apparatus 1 also exhibits a deflector 8 disposed in the chamber 5 and, in particular, interposed between the inlet 4b and the outlet 4a. In this way, the deflector 8 diverts the flow of air sucked through the inlet 4b to convey the same air along a predetermined path P defined in the chamber 5, as illustrated in Fig. 3.
- the deflector 8 is made up of a wall 9 disposed in cantilever fashion inside the chamber 5, and having an opposing surface 10 facing the inlet 4b.
- the wall 9 exhibits a first end 9a associated on top with an internal surface 5a defining the chamber 5, and a second end 9b opposite the first 9a and facing the filter means 7.
- the second end 9b of wall 9 has a projection 11 facing an internal side surface 5a of chamber 5. In this way, there is defined a region 12 for the acceleration of the sucked air between the projection 11 and the internal surface 5a.
- acceleration region 12 is disposed in correspondence of the first length P' and exhibits a passage section S which is smaller than the passage section S' in correspondence of the inlet 4b.
- the above mentioned path P for the sucked air consists of a first length P' extending from the inlet 4b to the water surface 7, and of a second length P" extending from the water surface 7 to the outlet 4a. Moreover, the path P exhibits an intermediate length M for connection to the first and second lengths P', P".
- the intermediate length M is between the second end 9b of wall 9 and the surface of water 7.
- the suction means 6, therefore, provide for directing the air to the inside of chamber 5 along the path P.
- the apparatus 1 disposed below the cylinder 2a sucks the air and the particles dropping from the separation region.
- the latter is directed from the surface 10 of wall 9 to the filter means 7 which consist of water.
- the air runs the first length P' as far as to reach the acceleration region 12 which, as mentioned above, has a passage section S which is smaller than the passage section S' as measured in the remaining first length P'.
- the air is accelerated, owing to the narrowing exhibited by the same region 12, and pushed at high speed towards the intermediate region M.
- the air by passing through the intermediate region M, is made to press onto the water thereby creating a depression in the water surface.
- Such depression provides a larger exchange surface wherein the cellulose particles, suspended in the air, are deposited and retained in the water.
- the air without particles flows along the second length P'' outwardly of outlet 4a to be carried back into the environment that surrounds the plant 2.
- the invention overcomes the problems of the known technique and obtains the proposed objects.
- the apparatus 1 allows the air to be efficiently filtered.
- the air to be filtered is pushed inwardly of the case 4 by the intake action of the suction means 6 and, as a consequence of this, all the cellulose particles (even those most light and volatile) are aspirated and retained by the apparatus 1.
- the formation of the depression on the water surface makes it possible to increase the exchange surface in which the particles are deposited onto the water itself.
- a sensor 12 that measures the pressure exerted by the water inside the chamber 5.
- the measure made by the sensor 12 is read by an electronic device 13 located in a position of easy access for an operator and connected to the sensor 12 via a waterproof cable 14.
- the shape of the case could also be of different configurations, either with simple (Fig. 4a) or double bottom (Fig. 4b), the latter being provided when wanting to increase the length L of the case, the depth H being equal.
Landscapes
- Paper (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT000131A ITFI20050131A1 (it) | 2005-06-10 | 2005-06-10 | Dispositivo di pulizia, in particolare per impianti di produzione di carta |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1731670A1 true EP1731670A1 (de) | 2006-12-13 |
EP1731670B1 EP1731670B1 (de) | 2011-11-09 |
Family
ID=37076284
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP06425381A Not-in-force EP1731670B1 (de) | 2005-06-10 | 2006-06-06 | Reinigungsvorrichtung, insbesondere für Papiermaschinen |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1731670B1 (de) |
AT (1) | ATE532903T1 (de) |
IT (1) | ITFI20050131A1 (de) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0002402A1 (de) | 1977-11-24 | 1979-06-13 | Paul Louis Babault | Staubsauger mit doppelter Filterung |
DE19720101C1 (de) * | 1997-05-14 | 1998-09-24 | Bahman Dr Solouki | Vorrichtung zum Umrüsten von Naß-/Trockenstaubsaugern zum Filtern durch ein Flüssigkeitsbad |
US5851358A (en) * | 1997-04-08 | 1998-12-22 | Voith Sulzer Paper Technology North America, Inc. | Paper making machine with an integral suction chamber and air/water separator for a doctor element |
EP1101863A2 (de) * | 1999-11-18 | 2001-05-23 | Andritz AG | Verfahren und Vorrichtung zur Staubabtrennung von einer laufenden Papierbahn |
US6565711B1 (en) * | 2000-08-05 | 2003-05-20 | Kleissler Jr Edwin A | Method for controlling dust on paper machinery and the like |
-
2005
- 2005-06-10 IT IT000131A patent/ITFI20050131A1/it unknown
-
2006
- 2006-06-06 AT AT06425381T patent/ATE532903T1/de active
- 2006-06-06 EP EP06425381A patent/EP1731670B1/de not_active Not-in-force
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0002402A1 (de) | 1977-11-24 | 1979-06-13 | Paul Louis Babault | Staubsauger mit doppelter Filterung |
US5851358A (en) * | 1997-04-08 | 1998-12-22 | Voith Sulzer Paper Technology North America, Inc. | Paper making machine with an integral suction chamber and air/water separator for a doctor element |
DE19720101C1 (de) * | 1997-05-14 | 1998-09-24 | Bahman Dr Solouki | Vorrichtung zum Umrüsten von Naß-/Trockenstaubsaugern zum Filtern durch ein Flüssigkeitsbad |
EP1101863A2 (de) * | 1999-11-18 | 2001-05-23 | Andritz AG | Verfahren und Vorrichtung zur Staubabtrennung von einer laufenden Papierbahn |
US6565711B1 (en) * | 2000-08-05 | 2003-05-20 | Kleissler Jr Edwin A | Method for controlling dust on paper machinery and the like |
Also Published As
Publication number | Publication date |
---|---|
ITFI20050131A1 (it) | 2006-12-11 |
ATE532903T1 (de) | 2011-11-15 |
EP1731670B1 (de) | 2011-11-09 |
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