METHOD AND INSTALLATION FOR REMOVING PETROLEUM PRODUCTS FROM WATER Russian patent published in 1998 - IPC

FIELD: oil removal methods. SUBSTANCE: sealed reservoir is filled with water and communicated with middle part of tank to cause curvilinear motion of polluted water stream. Curvilinear motion can be created either before tank inlet or in the tank. In particular, motion can be circular. Installation contains intercommunicated (possibly through a pipe) reservoir and tank. The latter has means to create curvilinear motion of polluted water, which is made in the form of curvilinear canal, tangential inlet, and spiral canal with variable-area cross section or expanding canal. EFFECT: intensified water cleaning process. 14 cl, 4 dwg