TWO-STAGE METHOD OF CLEANING SURFACES FROM OIL PRODUCTS Russian patent published in 2016 - IPC B08B3/02 

FIELD: technological processes; oil and gas industry.

SUBSTANCE: invention relates to methods of cleaning surfaces from hydrocarbon contaminants and can be used in various industries for powered washing and cleaning equipment and material ducts during preparation for internal survey, repair and/or changing content. Method includes the first stage consists in supply of working medium in form of a Jet onto treated surface and removal from processing zone products washing and the second stage consists in rinsing washed surface of the second working medium and removing products rinsing. Products of washing and rinsing with both processing stages is discharged in collector-separator for coarse separation into hydrocarbon, water and emulsion layers. Emulsion layer containing direct and reverse emulsion is used as working medium at the first stage of treatment. Water layer is used as working medium at the second stage of treatment. Part of the hydrocarbon layer is directed to the station dehydration to separate water from it and return to compensation of losses of water layer, and dehydrated hydrocarbons is implemented as a commercial product.

EFFECT: efficient cleaning surface with simplification of technology and reduction of total costs.

1 cl, 1 dwg