DEVICE FOR PURIFICATION OF OILY WASTE WATER Russian patent published in 2005 - IPC

FIELD: petroleum industry; equipment of purification of oily waste water at oil fields.

SUBSTANCE: the invention is dealt with equipment for purification of oily waste water and may be used at enterprises engaged in purification and use of waste water of oil fields. The device contains: a pipeline of delivery of initial oily waste waters; a forcing hydrocyclone with a cylindrical chamber installed at the lower unloading outlet of which; a settler; distributing devices. The settler has separating partitions, crude oil collectors, a device for withdrawal of purified water and also settlings. For exclusion of effect of a hydrostatical liquid column on the processes of fragmentation and coalescence of drops of petroleum the hydrocyclone and the cylindrical chamber are installed horizontally. The connecting pipe of withdrawal from the upper unloading outlet of the hydrocyclone is tangentially connected to the cylindrical chamber of the lower unloading outlet of the hydrocyclone in the direction of a swirling flow in the chamber of the lower unloading outlet at a space equal to 1.0-1.1 of diameter of the chamber from its front butt. The technical result is an increase of efficiency of purification.

EFFECT: the invention ensures increased efficiency of oily waste water purification.

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