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EP0433434A1 - Systeme ameliore d'egouttage mecanique a vanne tourbillonnaire - Google Patents

Systeme ameliore d'egouttage mecanique a vanne tourbillonnaire

Info

Publication number
EP0433434A1
EP0433434A1 EP90911100A EP90911100A EP0433434A1 EP 0433434 A1 EP0433434 A1 EP 0433434A1 EP 90911100 A EP90911100 A EP 90911100A EP 90911100 A EP90911100 A EP 90911100A EP 0433434 A1 EP0433434 A1 EP 0433434A1
Authority
EP
European Patent Office
Prior art keywords
valve
control
separator
vacuum
vortex
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Withdrawn
Application number
EP90911100A
Other languages
German (de)
English (en)
Other versions
EP0433434A4 (en
Inventor
Thomas Stephen Fielding
Charles Richard Mc Call
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.)
Albany International Corp
Original Assignee
Albany International Corp
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
Application filed by Albany International Corp filed Critical Albany International Corp
Publication of EP0433434A1 publication Critical patent/EP0433434A1/fr
Publication of EP0433434A4 publication Critical patent/EP0433434A4/en
Withdrawn legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/48—Suction apparatus

Definitions

  • This invention pertains to an improved web dewatering system for the papermaking industry, and more particularly to a dewatering system for a web or the like by applying vacuum thereto through a vortex valve.
  • a vacuum applying means such as a suction pipe or box with one or more slots is positioned in alignment with a web.
  • the suction pipe is positioned so that the web passes over the slot and when the appropriate pressure differential is produced the web will be dewatered, the water being drawn into the suction pipe and directed to an appropriate collection location.
  • a separator is used to separate water and solids from air in the system and the air is exhausted through a mechanical valve which may be operated either remotely or manually.
  • an objective of the present invention is to provide a dewatering system using a vortex valve whereby the need for the mechanical valve with its moving parts is eliminated.
  • a further objective of the invention is to provide a dewatering system with a vortex valve which is responsive and easily controlled to permit the use of sophisticated control schemes.
  • a dewatering system constructed in accordance with the invention includes a suction pipe, a vacuum box, or other vacuum application means of removing water from a web by applying vacuum thereto.
  • the term web is used generically to cover either the pulp from which a paper sheet is formed, or a felt used for drying a paper sheet.
  • the vacuum necessary for this operation is applied to the vacuum application means through a control valve and separator means for separating solids and liquids from the gas suctioned through the web.
  • the control valve comprises a vortex valve.
  • a vortex valve known also as a vortex amplifier, is a fluidic device which does not have moving parts and seals prone to wear and corrosion during use, and it comprises a vortex chamber through which a main flow passes radially to emerge at an axial outlet.
  • the main flow can be regulated and controlled by a control flow introduced tangentially into the vortex chamber, as disclosed for example in European Patent Specification No. 0089186 (corresponding to U.S. Patent No. 4,422, 476) .
  • the vortex valve provides a uniform pressure at the separator gas outlet substantially independently of the gas flow exiting from said separator.
  • Figure 1 is a schematic arrangement of a dewatering system for papermaking constructed in accordance with the invention
  • Figure 2 discloses a first alternate embodiment of the invention
  • Figure 3 discloses a second alternate embodiment of the invention.
  • Figure 4 discloses a third alternate embodiment of the invention.
  • a vacuum box or suction pipe 1 in a papermaking machine is used to dewater a web P traveling over the box.
  • the box communicates through conduit 2 with a separator 3.
  • One end of the separator 3 drains into a vessel 4 and the opposite end of the separator 3 is connected to a vacuum header 5 by way of a vortex valve or vortex amplifier 6.
  • the vortex valve or amplifier is basically a chamber having supply, outlet and control ports.
  • One such vortex valve or amplifier is disclosed in European Patent Specification No. 0089186.
  • the outlet from the vortex valve 6 is connected to the vacuum header 5.
  • the separator 3 is connected to the inlet of the vortex valve 6.
  • the control port is connected to conduit 8 which in the embodiment of Figure 1 is open to the atmosphere.
  • a vacuum gauge 9 can be included in the flow path from the separator 3 to the inlet of the vortex valve 6.
  • web P passes over the vacuum box 1 during papermaking.
  • Water drains into the box 1 and the water will contain some other drainage such as pulp which can clog and block conventional valves hitherto used to control the level of vacuum in the box 1.
  • the water containing drainage is drawn along conduit 2 into the separator 3 to drain into the vessel 4.
  • a fraction of the solid pulp particles can be drawn by the suction of the header 5 into the vortex valve 6.
  • the vortex valve has relatively large orifices with no moving parts and hence the possibility of blockage by the solid particles and consequent performance degradation is reduced considerably.
  • Valve 6 is designed to maintain a non-adjustable, relatively constant pressure at the outlet of separator 3.
  • valve 6 can be adjusted by including an adjustable valve 10 in conduit 8 as shown in Figure 2. This valve 10 can be adjusted manually by an operator to set the operating point of valve 6.
  • valve 10 can be a motorized valve which adjusts air flow to the control port of the vortex valve 6 in response to signals from a remote location.
  • a pressure transducer 11 may be provided to measure the pressure upstream of valve 6. This pressure is then supplied to a control unit 12 to control the motorized valve 10.
  • valve 6 it may be desirable to apply positive pressure to valve 6, for example, by coupling an air source such as a fan 7 to conduit 8, as shown in Figure 4.
  • an air source such as a fan 7
  • conduit 8 it may be desirable to apply positive pressure to valve 6, for example, by coupling an air source such as a fan 7 to conduit 8, as shown in Figure 4.

Landscapes

  • Paper (AREA)
  • Cyclones (AREA)
  • Processing Of Solid Wastes (AREA)
  • Treatment Of Sludge (AREA)

Abstract

L'invention concerne un système d'égouttage mécanique utilisé dans une machine de fabrication de papier, destiné à éliminer l'eau d'une bande (P) telle qu'une feuille de papier en pâte de cellulose. Le système d'écoulement comprend un vide ou un caisson d'aspiration (1), un séparateur (3) destiné à séparer les solides et/ou les liquides de l'écoulement, ainsi qu'une vanne tourbillonnaire (6) reliant ledit séparateur (3) audit vide (5). Ladite vanne tourbillonnaire (6) maintient une pression sensiblement constante au niveau de la sortie du séparateur, indépendamment de l'écoulement de gaz dans ladite vanne (6).
EP19900911100 1989-06-23 1990-06-21 Improved dewatering system with vortex valve Withdrawn EP0433434A4 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8914438 1989-06-23
GB898914438A GB8914438D0 (en) 1989-06-23 1989-06-23 An improved fluidic control system

Publications (2)

Publication Number Publication Date
EP0433434A1 true EP0433434A1 (fr) 1991-06-26
EP0433434A4 EP0433434A4 (en) 1991-10-23

Family

ID=10658938

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900911100 Withdrawn EP0433434A4 (en) 1989-06-23 1990-06-21 Improved dewatering system with vortex valve

Country Status (8)

Country Link
EP (1) EP0433434A4 (fr)
JP (1) JPH04500395A (fr)
AU (1) AU6030890A (fr)
BR (1) BR9006817A (fr)
CA (1) CA2033210A1 (fr)
FI (1) FI905016A7 (fr)
GB (2) GB8914438D0 (fr)
WO (1) WO1991000388A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8757667B2 (en) 2010-07-16 2014-06-24 Ipex Technologies Inc. Adapters and connector assemblies for flow managing apparatuses
CA2714675C (fr) 2010-07-16 2017-05-09 Ipex Technologies Inc. Ensembles de connecteurs pour dispositifs limiteurs de debit

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3024839A (en) * 1959-05-18 1962-03-13 Beloit Iron Works Suction regulating means
US3447383A (en) * 1966-01-04 1969-06-03 United Aircraft Corp Twin vortex angular rate sensor
US3461908A (en) * 1967-04-06 1969-08-19 Broughton Corp Vacuum relief valve
GB1192965A (en) * 1967-08-15 1970-05-28 Rolls Royce Improvements in Fluidics
GB1257916A (fr) * 1968-08-09 1971-12-22
US3563260A (en) * 1968-11-08 1971-02-16 Sperry Rand Corp Power transmission
GB1300406A (en) * 1969-06-25 1972-12-20 Atomic Energy Authority Uk Improvements in fluid flow control devices
GB1469405A (en) * 1974-03-18 1977-04-06 Atomic Energy Authority Uk Fluidic devices
US4308077A (en) * 1979-12-06 1981-12-29 Albany International Corp. Constant flow felt dewatering system
US4329201A (en) * 1979-12-06 1982-05-11 Albany International Corp. Constant vacuum felt dewatering system
US4447924A (en) * 1982-02-18 1984-05-15 Albany International Corp. Moisture control system for controlling the amount of chemical added to a fabric
DE3361097D1 (en) * 1982-03-16 1985-12-05 Atomic Energy Authority Uk Fluidic control device
US4810264A (en) * 1984-02-23 1989-03-07 Shell Oil Company Process for cleaning and splitting particle-containing fluid with an adjustable cyclone separator
US4774974A (en) * 1985-04-10 1988-10-04 Teter Bruce W System for removing asbestos from structures
GB2209411B (en) * 1987-08-28 1991-07-10 Atomic Energy Authority Uk A method of controlling flow in a flow line
US4817863A (en) * 1987-09-10 1989-04-04 Honeywell Limited-Honeywell Limitee Vortex valve flow controller in VAV systems

Also Published As

Publication number Publication date
CA2033210A1 (fr) 1990-12-24
GB9013894D0 (en) 1990-08-15
BR9006817A (pt) 1991-08-06
JPH04500395A (ja) 1992-01-23
FI905016A7 (fi) 1990-12-24
EP0433434A4 (en) 1991-10-23
GB2233473A (en) 1991-01-09
GB8914438D0 (en) 1989-08-09
WO1991000388A1 (fr) 1991-01-10
FI905016A0 (fi) 1990-10-12
AU6030890A (en) 1991-01-17

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