EP 0757736 B1 19980408 - METHOD AND DEVICE FOR DE-ICING ROAD CARRIAGEWAYS INVOLVING THE RE-USE OF RECOVERED THAWING SOLUTION
Title (en)
METHOD AND DEVICE FOR DE-ICING ROAD CARRIAGEWAYS INVOLVING THE RE-USE OF RECOVERED THAWING SOLUTION
Title (de)
VERFAHREN UND EINRICHTUNG ZUM ENTEISEN VON FAHRBAHNEN UNTER WIEDERVERWENDUNG RÜCKGEWONNENER AUFTAULÖSUNGEN
Title (fr)
PROCEDE ET DISPOSITIF DE DEGLACAGE DE VOIES DE CIRCULATION IMPLIQUANT LA REUTILISATION D'UNE SOLUTION DE DEGIVRAGE RECUPEREE
Publication
Application
Priority
- DE 4414520 A 19940426
- EP 9501534 W 19950424
Abstract (en)
[origin: US5853262A] PCT No. PCT/EP95/01534 Sec. 371 Date Oct. 23, 1996 Sec. 102(e) Date Oct. 23, 1996 PCT Filed Apr. 24, 1995 PCT Pub. No. WO95/29296 PCT Pub. Date Nov. 2, 1995A process and an apparatus installation for de-icing roadways (1) automatically, to which is applied a melting-agent solution in water to lower the freezing point. The run-off from the roadways may be mixed with precipitation water and melted snow and ice as melt water. The latter is collected and, after having tested its melting-agent content (in 18), at least a portion of the melting-agent contained in the run-off leaving the roadway surface is re-used by re-applying it as an aqueous melting solution (via 11)-if necessary after adding fresh melting-agent-and, in particular, helps save melting-agent and is also less damaging to the environment by increasing (in 26) the solution's concentration in the melt water to be re-used before re-applying it as a melting solution in one separation step in the course of which water (in 31) free of or low in melting-agent on the one hand and a more highly concentrated solution (in 32) on the other hand are created as partial flows, as a consequence of which a larger percentage of the melt water can be re-used. This cycle can also integrate polluant-elimination steps.
IPC 1-7
IPC 8 full level
E01H 10/00 (2006.01)
CPC (source: EP US)
E01H 10/005 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE CH DK FR IT LI NL
DOCDB simple family (publication)
US 5853262 A 19981229; AT E164901 T1 19980415; CA 2188935 A1 19951102; DE 4414520 C1 19950928; DK 0757736 T3 19990111; EP 0757736 A1 19970212; EP 0757736 B1 19980408; WO 9529296 A1 19951102
DOCDB simple family (application)
US 72757696 A 19961023; AT 95918593 T 19950424; CA 2188935 A 19950424; DE 4414520 A 19940426; DK 95918593 T 19950424; EP 9501534 W 19950424; EP 95918593 A 19950424