Density Difference (Gravity Separation)
Natural gas is lighter than liquid hydrocarbon. Minute particles of liquid hydrocarbon that arc temporarily suspended in a stream of natural gas will, by density difference or force of gravity, settle out of the stream of gas if the velocity of the gas is sufficiently slow. Technical Data used in the field explained in oil and gas courses in Islamabad. The larger droplets of hydrocarbon will quickly settle out of the gas, but the smaller ones will take longer.
At standard conditions of pressure and temperature, the droplets of liquid hydrocarbon may have a density 400 to 1,600 times that of natural gas. However, as the operating pressure and temperature increase, the difference in density decreases. At an operating pressure of 800 psig, the liquid hydrocarbon may be only 6 to 10 times as dense as the gas. Thus, operating pressure materially affects the size of the separator and the size and type of mist extractor required to separate adequately the liquid and gas. Some more details of oil and gas courses in Islamabad are as under.
The fact that the liquid droplets may have a density 6 to 10 times that of the gas may indicate that droplets of liquid would quickly settle out of and separate from the gas. However, this may not occur because the particles of liquid may be so small that they tend to “float” in the gas and may not settle out of the gas stream in the short period of time the gas is in the oil and gas separator. ly are needed to remove smaller particles from the gas. Particles of liquid hydrocarbon with diameters of 100 pm and larger will generally settle out of the gas in most average-sized separators. However, mist extractors usual As the operating pressure on a separator increases, the density difference between the liquid and gas decreases. For this reason, it is desirable to operate oil and gas separators at as low a pressure as is consistent with other process variables, conditions, and requirements. TSK Training for Skills and Knowledge is the best institute in Rawalpindi Islamabad for Pakistani Students who wants to join oil and gas courses in Rawalpindi.