SEPARATION VESSEL WITH ENHANCED PARTICULATE REMOVAL

摘要

A separation tank for crude oil. Fluid enters an inlet section of a center column of the tank via an offset inlet pipe so the fluid enters swirling. Solids that settle in the inlet section are removed by a center column drain and a solids removal system. Free gas rises and exits from the top of the tank. Liquid flows out of the center column via a diffuser that spirals the fluid evenly toward the wall of the tank where oil coalesces and wicks upward. Liquid flows downward around two flow diverting baffles where more oil coalesces and wicks upward via an oil conduit into the oil layer. The water flows under the lower flow diverting baffle and exits the tank through the outlet section. A large circular oil collector weir uniformly removes oil from the oil layer. Interface draw offs located below the oil-water interface remove excess BS&W.

主权项

1. A separation tank with enhance particulate removal for separating gas, water and particulates from crude oil comprising:
a tank provided internally with a gas section at its top and a water section at its bottom with an oil section located between the gas section and the water section, means for discharging gas from the gas section, means for discharging particulates from the tank, said tank provided with a vertical center column, said center column divided into an inlet section and an outlet section, an inlet pipe attached to the center column offset so that fluid entering the inlet section from the inlet pipe swirls in a circular fashion within the center column, a spiral swirl vane diffuser provided in the center column above the inlet pipe so that liquid flows out of the center column via the diffuser in an outwardly spinning and ever increasing radius spiral to slow the velocity of the fluid and increase its effective separation time within the water section, a circular oil collector weir provided at a top of the oil section of the tank to remove oil from the oil section and discharge it from the tank, an upper flow diverting baffle located below the spiral diffuser and a lower flow diverting baffle provided below the upper flow diverting baffle so that fluid flows downward within the water section around the two flow diverting baffles, and outlet holes provided in the outlet section of the center column under the lower flow diverting baffle such that fluid flows through the outlet holes into the outlet section to exit the tank.