DEVICE FOR MIXING OF DIFFERENT OIL GRADES Russian patent published in 2015 - IPC B01F3/08 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to oil industry, namely to devices for mixing of different oil grades. The device includes at least one oil quality measuring unit, at least one charging pump, at least one pressure control and a flow rate related to it, a device having a possibility of being connected to at least two inlet pipelines for supply of oil of different grades: from the main line and from a tank farm and at least to one outlet main pipeline of mixed oil, which contains the main line pump, the device includes at least one auxiliary pump installed on the supply pipeline of oil supplied from the tank farm, with that, the auxiliary pump supplies oil to the charging pump inlet at provision of constant flow rate via the main oil line, with that, as an auxiliary pump there chosen is a pump of a centrifugal type, which is provided with a variable frequency drive and ensures a reduced head in comparison to the charging pump.

EFFECT: improving operating reliability of the device due to reduction of head on a pressure control, which is installed after the auxiliary pump at reduction of electrical power costs.

3 cl, 2 dwg