The invention provides a circulating type oil-gas vacuum adsorption and
recovery system comprising a crude-
oil storage tank, comprising the crude-
oil storage tank, a vacuum desulfurization device, an adsorption tank, a
vacuum pump, an absorbent treating device and an absorption
tower, wherein the absorbent treating device treats
crude oil pumped from the crude-
oil storage tank into lean
gasoline;volatile oil gas of the crude-oil
storage tank enters the vacuum desulfurization device and then enters the adsorption tank for adsorption and
recovery after
desorption and desulfurization; standard air is exhausted into
atmosphere from the upper end of the adsorption tank, and nonstandard
tail gas reenters the adsorption tank for circulating adsorption and
recovery; the
vacuum pump is used for carrying out vacuum
desorption and regeneration on the adsorption tank with saturated adsorption; and desorbed high-concentration oil gas enters the absorption
tower, and is absorbed by the lean
gasoline body from the absorbent treating device, and the rich
gasoline after absorption returns to the crude-oil
storage tank. The circulating type oil-gas vacuum adsorption and recovery
system is convenient and simple, volatile oil gas is absorbed and recovered by fully utilizing the self characteristic of the
crude oil, additional equipment and resources do not need to be added, and the secondary
pollution is not caused as well.