FIELD: purification of the steam-gaseous medium discharged into the atmosphere from hydrocarbons.
SUBSTANCE: the invention is pertinent to the field offluidics and intended for use in the systems of purification of the steam-gaseous medium discharged into the atmosphere from hydrocarbons formed during storage of petroleum and at filling up containers with oil products. The method includes pumping a liquid medium in the liquid-gaseous jet device, the steam-gaseous medium pumping out by the jet device from the container filled with petroleum and-or from a reservoir used foe storage of petroleum, the steam-gaseous medium squeezing in the liquid-gaseous jet device at the expense of power of the liquid medium, feeding of the mixture of steam-gaseous and fluid mediums formed in the liquid-gaseous jet device into a separator, separation in the separator of the mixture for a gas phase and a liquid medium with withdrawal from the separator of the gas phase and the liquid medium. A gas phase from the separator is fed into an absorption tower, into which in the capacity of an absorbent a hydrocarbon liquid is fed. In the absorption tower they carry out a process of absorption by the hydrocarbon liquid of hydrocarbon from the gaseous phase. Then the purified from hydrocarbons gaseous phase and the hydrocarbon liquid with dissolved in it hydrocarbons of the gaseous phase are separately withdrawn from the absorption tower. In the capacity of a hydrocarbon liquid they use gasoline or kerosene fractions of a crude distillation and before feeding the hydrocarbon liquid into the absorption tower is cooled to the temperature located in the range from minus 10°C to minus 50°C. At that the gaseous phase after its withdrawal from the absorption tower is fed into a membranous apparatus, where the rest gaseous hydrocarbons are separated from it. Then the depleted hydrocarbon gas and the enriched with hydrocarbon gas are separately withdrawn from the membranous apparatus. The invention ensures reduction of losses of the oil products and an increased efficiency of purification from hydrocarbons of the steam-gaseous medium formed during storage of oil products and at filling containers with them.
EFFECT: the invention ensures reduction of losses of the oil products, increased efficiency of purification.
8 cl, 2 dwg
