Introduction of recovery process in crude oil processing

The stable light hydrocarbon recovery process for negative pressure crude oil includes the following: first, an equilibrium vaporization process of crude oil in a stable tower; and second, a one-time equilibrium condensation process of oil and gas in a condenser. Crude oil is separated by oil and gas and dehydrated. The crude oil is heated to enter the upper part of the stabilizing tower to perform flash stabilization. The degree of vacuum in the tower is kept in the range of -0.05 to 0.04 MPa. The flash gas is extracted from the top of the tower by a negative pressure screw compressor and undergoes compression cooling. The light hydrocarbons are cooled and the liquid enters the storage tank. The non-condensable gas enters the associated gas network. The stabilized crude oil is directly transferred from the bottom of the stabilization tower via the external pump.

In order to achieve the desired stabilizing effect during the stabilization of the crude oil under negative pressure, it is necessary to heat up the crude oil to above 80°C. The oil and gas extracted by a negative pressure screw compressor need to be cooled by a heat exchanger.

With the increase of the amount of sewage in the later stage of oilfield development, the injection of water in the oil field will no longer need to be replenished with fresh fresh water. The cooling water will not go to the road. The cooling method of the normal temperature water will be difficult to maintain and the effect will naturally deteriorate. In order to save water, the Wensan United Station uses a spray-evaporative air cooler for cooling. In the winter when the temperature is low, the effect is good, but when the temperature is high in the summer, the cooling effect becomes worse.

The negative pressure operation of the negative pressure machine, the increase of the vacuum level at the top of the crude oil stabilizing tower, the high liquid level in the crude oil stabilizing tower, or the phenomenon of pumping out of the air, making the production and operation management more difficult, the hidden danger of the accident increasing, and the operating time rate and light Reduced hydrocarbon recovery. Although the liquid light hydrocarbons recovered are stored under pressure and sealed, they are all transported and sold using open oil tank trucks. The evaporation loss during loading is as high as more than 10%, which not only causes direct loss of light hydrocarbons, but also pollutes the environment. Constitutes hidden dangers in the loading process. Light hydrocarbon explosions occur frequently.

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Bisphenol S,Bis-(3-allyl-4-hydroxyphenyl) sulfone,2-Acrylamido-2-methylpropane,Ammonium persulfate

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