Global Patent Index - EP 1023242 A1

EP 1023242 A1 2000-08-02 - METHOD AND APPARATUS FOR PURIFYING A LIQUID BY MEANS OF FLOTATION

Title (en)

METHOD AND APPARATUS FOR PURIFYING A LIQUID BY MEANS OF FLOTATION

Title (de)

VERFAHREN UND VORRICHTUNG ZUR REINIGUNG EINER FLÜSSIGKEIT MIT HILFE EINER FLOTATION

Title (fr)

PROCEDE ET DISPOSITIF DE PURIFICATION D'UN LIQUIDE PAR FLOTTATION

Publication

EP 1023242 A1 (EN)

Application

EP 98901627 A

Priority

  • SE 9800066 W
  • SE 9700100 A

Abstract (en)

[origin: WO9831634A1] Method for purifying a liquid by means of flotation at which the water to be cleaned as well as the dispersion water (or liquid) is fed to the lower part of a first long and narrow standing preferably cylindrical vessel (23) whereby in the water column defined by the form of the vessel a rising water current is achieved which gives to the particles or flocculations in the water column a rising movement which movement increases the flotation effect of the micro bubbles which are created at the dispersion nozzle as well as during the successive decrease in pressure which takes place in the water column and which bubbles by means of the design of the vessel will be given a high concentration, which vessel (23) at least at its upper open end is surrounded by a second open vessel (22) the edges of which reach higher than the upper edge of said first vessel (23) and at the lower part of which a pipe joint (32) is arranged for the outflow of the cleaned liquid and at the upper part of which a third vessel (29) is arranged for receiving of the separated impurities from the second vessel (22).

IPC 1-7 (main, further and additional classification)

C02F 1/24

IPC 8 full level (invention and additional information)

C02F 1/24 (2006.01)

CPC (invention and additional information)

C02F 1/24 (2013.01)

Citation (search report)

See references of WO 9831634A1

Designated contracting state (EPC)

CH DE DK FI FR GB LI NL SE

EPO simple patent family

WO 9831634 A1 19980723; AU 5786398 A 19980807; EP 1023242 A1 20000802; SE 9700100 D0 19970115; SE 9700100 L 19980716

INPADOC legal status


2004-02-04 [18D] DEEMED TO BE WITHDRAWN

- Ref Legal Event Code: 18D

- Effective date: 20030801

2000-08-02 [17P] REQUEST FOR EXAMINATION FILED

- Ref Legal Event Code: 17P

- Effective date: 19990824

2000-08-02 [AK] DESIGNATED CONTRACTING STATES:

- Ref Legal Event Code: AK

- Designated State(s): CH DE DK FI FR GB LI NL SE