EP0357939B1 - Drehrohr - Google Patents

Drehrohr Download PDF

Info

Publication number
EP0357939B1
EP0357939B1 EP89113941A EP89113941A EP0357939B1 EP 0357939 B1 EP0357939 B1 EP 0357939B1 EP 89113941 A EP89113941 A EP 89113941A EP 89113941 A EP89113941 A EP 89113941A EP 0357939 B1 EP0357939 B1 EP 0357939B1
Authority
EP
European Patent Office
Prior art keywords
revolving
rotating drum
tube
sealing
tubular furnace
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
EP89113941A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0357939A3 (de
EP0357939A2 (de
Inventor
Hans-Peter Wenning
Michael Blasko
Reinhard Vits
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.)
Veba Oel Technologie und Automatisierung GmbH
Original Assignee
Veba Oel Technologie und Automatisierung 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
Application filed by Veba Oel Technologie und Automatisierung GmbH filed Critical Veba Oel Technologie und Automatisierung GmbH
Publication of EP0357939A2 publication Critical patent/EP0357939A2/de
Publication of EP0357939A3 publication Critical patent/EP0357939A3/de
Application granted granted Critical
Publication of EP0357939B1 publication Critical patent/EP0357939B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
    • F27B7/20—Details, accessories, or equipment peculiar to rotary-drum furnaces
    • F27B7/22—Rotary drums; Supports therefor
    • F27B7/2206—Bearing rings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
    • F27B7/20—Details, accessories, or equipment peculiar to rotary-drum furnaces
    • F27B7/22—Rotary drums; Supports therefor
    • F27B7/24—Seals between rotary and stationary parts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
    • F27B7/02—Rotary-drum furnaces, i.e. horizontal or slightly inclined of multiple-chamber or multiple-drum type
    • F27B2007/022—Rotary-drum furnaces, i.e. horizontal or slightly inclined of multiple-chamber or multiple-drum type the drum having a non-uniform section along its length
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
    • F27B7/20—Details, accessories, or equipment peculiar to rotary-drum furnaces
    • F27B7/22—Rotary drums; Supports therefor
    • F27B7/2206—Bearing rings
    • F27B2007/2233—Bearing rings the ring being fixed to the drum, e.g. welded
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S277/00—Seal for a joint or juncture
    • Y10S277/903—Seal for rotating kiln or drum

Definitions

  • the invention relates to a driven on the outer circumference and by means of axially symmetrically arranged on the outer circumference of the rotating rings on the outer circumference of the rotating rings on rollers rotating in the area of the adjacent to the rotary tube ends provided lines or nozzles for product entry, product gas discharge and solids outlet for thermal treatment, smoldering or pyrolysis liquid or solid substances or mixed phases by means of indirect heating through a stationary muffle arranged around the rotary tube jacket.
  • Such devices were used on the discharge side were arranged slightly inclined downwards from the horizontal, often provided as so-called ball ovens with a loading of steel balls, in order to use flat ribs welded in the longitudinal direction as a driver to cause the balls to be carried as high as possible in the rotating oven, and then to fall down the crusts that form (see page 254, loc. cit.).
  • smoldering can also result in waste materials such as plastic waste, residues contaminated with hydrocarbon, contaminated soils, biomass, sludge and the like. Like. be worked up on liquid products and smoldering tar in addition to smoldering gas and smoldering coke.
  • the heat losses associated with the races and also the drive of the rotary tube which is often carried out as a chain drive via gears, also lead to a deterioration in the liquid product yield due to premature condensation with subsequent cracking and polymerization reactions.
  • the known rotary tube designs were usually designed with a soft, axial expansion compensator for the rotary tube head.
  • the sealing function of the rotating sealing part which is pressed onto the stationary sealing part with a pressure roller, for example, and contains two sealing packs, is considerably impaired by rotary eccentricities.
  • the task of the invention is derived from these inadequacies of contributing to better thermal and chemical efficiency by means of improved thermal insulation, in particular in the area of the races of the rotary tube.
  • Another object is to contribute to an improved sealing function and a significantly increased service life of the sealing packs between the moving and the stationary parts of the rotary tube by means of an improved structural arrangement of the elements of the mechanical seal system.
  • An advantageous embodiment of the mechanical seal system according to the invention consists in the fact that it has an elastic sealing part with a compensator unit that is adjusted hydraulically, pneumatically or by spring force to compensate for the wear of the actual sealing elements.
  • the proposed mechanical seal system with, for example, a ball-bearing frame construction and a rigid connection to Rotary tube head allows the rotary tube head to take part in all movements of the rotary tube with the exception of the rotary movement about the axis of rotation.
  • the seal Due to the structural unit of a rotary ball joint, as will be explained in more detail below as an exemplary embodiment, with the elastic part of the mechanical seal in a frame construction, the seal is guided precisely, and it is easy to compensate for expansion to compensate for wear of the sealing elements such as packings, metal rings or the like possible. In this way, the feed and discharge head make "free floating" all movements, and in particular also the thermal expansion of the rotary tube that exceeds the wear of the sealing elements by a multiple.
  • a screwed to the rotating part of the seal flange 1 is with the entire circumference
  • the outer jacket of the rotary tube 2 is welded at its ends.
  • the sealing elements 3, 4, 5, z. B. packs, metal rings or the like Made of suitable materials mechanically exactly, whereby a reliable seal is effected in cooperation with the standing sealing flange 6.
  • a sealing gas or a sealing liquid can be supplied by means of passage valves or the like in order to create a flow in the direction opposite the space to be sealed of the inside of the rotary tube to ensure sufficient low overpressure.
  • another flange 7 is arranged as part of a frame structure 8, which can be designed, for example, as a welded construction, in such a way that a compensator unit 9 is welded in between these two flanges.
  • This compensator unit 9 forms the elastic part of the seal and is used in particular to compensate for the wear of the sealing elements. It is designed as a metal compensator, for example as a bellows.
  • the contact pressure of the sealing flange against the sealing elements can be kept constant by means of spring 10, hydraulics or pneumatics the wear of the sealing elements 3, 4, 5 can be compensated for within certain limits.
  • a further sealing space is formed by a sealing element 11 between flange 7 and rotary tube head 12, which protects the components of the sealing system from the partially chemically aggressive pyrolysis gases, coke deposits and the like. Protects.
  • the non-rotating part of the seal is expediently secured against the moment exerted by the rotating part by means of torque locks, not shown in the figure, in the form of rigid rod connections between the frame construction and the standing sealing flange.
  • the two non-rotating flanges 6 and 7 of the sealing system are kept parallel by the stationary frame construction 8 in all practical operating conditions.
  • the ball slewing ring 13 is screwed to its inner ring, the outer ring is firmly connected, for example screwed, to the frame 8 which ensures the frame connection.
  • the frame connection is screwed to the standing and non-compensated sealing flange 7 at the other end.
  • this sealing flange is bridged by the compensator 9 with the other standing sealing flange, which is in contact with the sealing elements, in order to compensate for wear.
  • Rotary tube designs such as those used for the smoldering of hydrocarbon-containing residues from the distillation of heavy oils or the like, are designed as rotary tubes with muffle heating for temperatures of up to 800 to 1200 ° C.
  • the process pressure is usually only a few hundred mbar above the external air pressure.
  • Indirect heating of the rotary tube is advantageously carried out by means of a stationary muffle which is arranged around the rotary tube and is heated with heating gases, with a suitable seal between the rotary tube and the muffle ensuring adequate utilization of the heating gases and proper guidance thereof.
  • races are attached directly to the hot rotary tube or have a direct thermally conductive connection to the hot rotary tube.
  • a further advantageous embodiment of the rotary tube of the type described at the outset is that the races 14 running on rollers are thermally insulated from the rotary tube shell 2 by an insulation 16 fitted between the rotary tube 2 and a rotary tube feed 15.
  • the illustration in FIG. 2 shows an example of such an arrangement.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Muffle Furnaces And Rotary Kilns (AREA)
  • Processing Of Solid Wastes (AREA)
  • Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
  • Joints Allowing Movement (AREA)
  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
EP89113941A 1988-09-09 1989-07-28 Drehrohr Expired - Lifetime EP0357939B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3830678 1988-09-09
DE3830678A DE3830678A1 (de) 1988-09-09 1988-09-09 Drehrohr

Publications (3)

Publication Number Publication Date
EP0357939A2 EP0357939A2 (de) 1990-03-14
EP0357939A3 EP0357939A3 (de) 1991-01-09
EP0357939B1 true EP0357939B1 (de) 1994-07-06

Family

ID=6362610

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89113941A Expired - Lifetime EP0357939B1 (de) 1988-09-09 1989-07-28 Drehrohr

Country Status (9)

Country Link
US (1) US5022852A (ja)
EP (1) EP0357939B1 (ja)
JP (1) JPH02113088A (ja)
AT (1) ATE108267T1 (ja)
CA (1) CA1326357C (ja)
DD (1) DD287767A5 (ja)
DE (3) DE3830678A1 (ja)
ES (1) ES2056157T3 (ja)
RU (1) RU2037509C1 (ja)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT397861B (de) * 1990-09-04 1994-07-25 Ragailler Roland Mag Drehofen, insbesondere zur pyrolyse von abfallprodukten
US5403468A (en) * 1991-03-13 1995-04-04 Kawasaki Steel Corporation Process for the manufacture of tinplate using a fused tin chloride electroplating bath
US5707592A (en) * 1991-07-18 1998-01-13 Someus; Edward Method and apparatus for treatment of waste materials including nuclear contaminated materials
AT398389B (de) * 1992-11-06 1994-11-25 Andritz Patentverwaltung Verfahren und anlage zur trennung von feststoff-flüssigkeit-mischungen
DE19623577C2 (de) * 1996-06-13 1998-04-30 Krc Umwelttechnik Gmbh Dichtung für Drehrohre
CA2362028C (en) * 2000-11-13 2009-01-20 Veba Oel Technologie Und Automatisierung Gmbh Rotary drum with rolling body arrangement
DE20019275U1 (de) * 2000-11-13 2002-03-28 Veba Oel Technologie & Automatisierung Gmbh Drehtrommel mit Wälzkörperanordnung
DE102018133566A1 (de) 2018-12-21 2020-06-25 Eisenmann Se Drehrohrofen
WO2024056721A1 (de) * 2022-09-16 2024-03-21 thyssenkrupp Polysius GmbH Dichtung für einen drehrohrofen
LU103007B1 (de) * 2022-09-16 2024-03-18 Thyssenkrupp Ag Dichtung für einen Drehrohrofen
EP4361545A1 (de) * 2022-10-25 2024-05-01 ThyssenKrupp Steel Europe AG Anlagenverbund und verfahren zum herstellen von roheisen

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR905278A (fr) * 1944-06-20 1945-11-29 Azote & Prod Chim Perfectionnements aux dispositifs d'étanchéité pour fours rotatifs et appareils analogues
DE1202207B (de) * 1964-04-16 1965-09-30 Beteiligungs & Patentverw Gmbh Vorrichtung zur Abdichtung der feststehenden gegen die beweglichen Teile eines Drehrohrofens
DE1783016B1 (de) * 1968-09-19 1970-08-27 Polysius Ag Drehtrommel
FR2049595A5 (ja) * 1969-06-13 1971-03-26 Metallgesellschaft Ag
BE771649A (fr) * 1970-09-09 1971-12-31 Fives Lille Cail Four ou echangeur de chaleur tubulaire et rotatif comportant aumoins une zone renforcee par une structure annulaire
US3724887A (en) * 1971-05-18 1973-04-03 Treadwell Corp Kiln seal
DE2263220C3 (de) * 1972-12-23 1975-12-11 Buettner-Schilde-Haas Ag, 4150 Krefeld Stopfbuchse zum Abdichten eines Gut- oder Heizmittetzu- oder -abführrohres bei Drehtrommeln
US4183726A (en) * 1978-04-13 1980-01-15 Seebald John W Pyro-processing rotary kiln mixing rod
DE3008741C2 (de) * 1980-03-07 1982-10-21 Buckau-Walther AG, 4048 Grevenbroich Vorrichtung für die Pyrolyse von Müll
DE3114695A1 (de) * 1981-04-10 1982-10-28 Krupp Polysius Ag, 4720 Beckum Vorrichtung zur abdichtung des spaltes zwischen drehrohrofen und einlaufgehaeuse
DE3320767A1 (de) * 1983-06-09 1984-12-13 Elino Industrie-Ofenbau Carl Hanf GmbH + Co, 5160 Düren Dichtungseinrichtung fuer oefen
DE3407236A1 (de) * 1984-02-28 1985-09-12 Environment Protecting Engineers, Inc., Southfield, Mich. Verfahren zur herstellung hochwertiger brennstoffe, drehtrommelreaktor zur durchfuehrung des verfahrens und verwendung des drehtrommelreaktors
EP0263404B1 (en) * 1986-09-30 1992-03-18 Nihon Cement Co., Ltd. Rotary kiln

Also Published As

Publication number Publication date
EP0357939A3 (de) 1991-01-09
EP0357939A2 (de) 1990-03-14
DD287767A5 (de) 1991-03-07
ES2056157T3 (es) 1994-10-01
RU2037509C1 (ru) 1995-06-19
CA1326357C (en) 1994-01-25
JPH02113088A (ja) 1990-04-25
DE3830678A1 (de) 1990-03-22
DE58908002D1 (de) 1994-08-11
DE3830678C2 (ja) 1991-05-08
US5022852A (en) 1991-06-11
ATE108267T1 (de) 1994-07-15
DE8903410U1 (de) 1990-01-04

Similar Documents

Publication Publication Date Title
EP0357939B1 (de) Drehrohr
DE69112458T2 (de) Pyrolitisches Konvertierungssystem.
DE2556601B2 (de) Drehrohrofen-Abdichtvorrichtung
DE3741112A1 (de) Verbesserte anlage zum pyrolisieren und/oder trocknen von biologischem schlamm oder dergleichen
DE3342572C2 (ja)
EP0149798A2 (de) Rotierende Schweltrommel zum Verschwelen von Abfallstoffen
DE102018133566A1 (de) Drehrohrofen
EP1516908B1 (de) Verkokungstrommel mit einem Rohrbrückenschieber
DE3702318C1 (en) Rotary drum for the carbonisation of wastes with exclusion of air
CH661341A5 (de) Drehrohrofen.
EP0813035B1 (de) Dichtung für Drehrohre
DE3316562C2 (ja)
US1540662A (en) Retort
EP0017811B1 (de) Drehrohr mit mindestens einem darin angeordneten wärmebeaufschlagbaren Behandlungsrohr
DE3320767C2 (ja)
DE2138924B2 (de) Druckgefäß für Atomkernreaktoren
CH673467A5 (ja)
DE3844684A1 (de) Drehrohr
DE622472C (de) Vorrichtung zur Destillation von Metallen
DE3227891A1 (de) Drehtrommel zur thermischen behandlung von schuettguetern
DE3605756C2 (ja)
DE3320192A1 (de) Drehtrommel zur behandlung von schuettgut
DE1009647B (de) Roehrenwaermeaustauscher
AT92552B (de) Drehretorte zum ununterbrochenen Schwelen.
AT156253B (de) Retorte und Retortenanlage zur Behandlung von festen, flüssigen, gas- oder dampfförmigen Rohstoffen bei Temperaturen bis zu 1000° C.

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19890808

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE CH DE ES FR GB GR IT LI LU NL SE

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: VEBA OEL TECHNOLOGIE GMBH

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE CH DE ES FR GB GR IT LI LU NL SE

17Q First examination report despatched

Effective date: 19920630

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: VEBA OEL TECHNOLOGIE UND AUTOMATISIERUNG GMBH

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE ES FR GB GR IT LI LU NL SE

REF Corresponds to:

Ref document number: 108267

Country of ref document: AT

Date of ref document: 19940715

Kind code of ref document: T

ET Fr: translation filed
REF Corresponds to:

Ref document number: 58908002

Country of ref document: DE

Date of ref document: 19940811

REG Reference to a national code

Ref country code: CH

Ref legal event code: PK

RIN2 Information on inventor provided after grant (corrected)

Free format text: WENNING, HANS-PETER * BLASKO, MICHAEL * VITS, REINHARD

ITF It: translation for a ep patent filed

Owner name: STUDIO JAUMANN

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2056157

Country of ref document: ES

Kind code of ref document: T3

EPTA Lu: last paid annual fee
GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19940912

REG Reference to a national code

Ref country code: GR

Ref legal event code: FG4A

Free format text: 3012990

EAL Se: european patent in force in sweden

Ref document number: 89113941.2

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GR

Payment date: 20040430

Year of fee payment: 16

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 20040507

Year of fee payment: 16

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 20040510

Year of fee payment: 16

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 20040611

Year of fee payment: 16

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: LU

Payment date: 20040622

Year of fee payment: 16

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 20040720

Year of fee payment: 16

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 20040731

Year of fee payment: 16

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050728

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050729

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050729

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050731

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050731

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050731

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20060201

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20060202

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

EUG Se: european patent has lapsed
NLV4 Nl: lapsed or anulled due to non-payment of the annual fee

Effective date: 20060201

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20050729

BERE Be: lapsed

Owner name: *VEBA OEL TECHNOLOGIE UND AUTOMATISIERUNG G.M.B.H.

Effective date: 20050731

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20080626

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 20080618

Year of fee payment: 20

Ref country code: FR

Payment date: 20080728

Year of fee payment: 20

Ref country code: IT

Payment date: 20080730

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20080806

Year of fee payment: 20

REG Reference to a national code

Ref country code: GB

Ref legal event code: PE20

Expiry date: 20090727

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20090727