Dehydration feeding buffer tank, raw oil dehydration process adopting buffer tank and application of raw oil dehydration process

Abstract

The invention relates to a dehydration feeding buffer tank, a raw oil dehydration process adopting the buffer tank and application of the raw oil dehydration process. The buffer tank is composed of a buffer tank body with a dehydration section tank body at the top and a vacuumizing system. A gas outlet is formed in the top of the buffer tank body; and a dehydrated oil outlet is formed in the bottom of the buffer tank body. The bottom of the dehydration section tank body is communicated with a gas outlet, a top outlet of the dehydration section tank body is connected with a steam ejector of the vacuumizing system, the vacuumizing system comprises the steam ejector, a water cooler and a separator which are sequentially connected, and the separator is provided with a water outlet, an oil outlet and a gas outlet; and the feeding hole is connected with a water-containing oil product in the raw material tank area, and the dehydrated oil outlet is connected with a feeding pump. According to the raw oil dehydration process, oil-water separation is realized by adopting a vacuumizing mode and utilizing different boiling point temperatures of water under different pressures, the dehydration rate is higher, the water content in the dehydrated oil is less than 10 ppm, and the dehydrated raw oil is pressurized by the feeding pump to be conveyed to the downstream, so that the requirements of a production device are completely met.

Description

technical field [0001] The invention relates to a dehydration feed buffer tank and a raw material oil dehydration process and application using the buffer tank, belonging to the fields of petrochemical and coal chemical industries. Background technique [0002] In recent years, as crude oil has become increasingly heavy and inferior, the density difference between water and oil accompanying crude oil production has decreased accordingly, and the density difference between heavy components and water after primary processing of heavy and inferior oil has been even smaller; in coal The coal tar produced during the classification and utilization process also contains a large amount of water, and the density difference between coal tar and water is also very small. [0003] Such as figure 2 As shown, the conventional raw material oil dehydration buffer process is: the water-containing raw oil 1 from the raw material tank area is settled and dehydrated by the dehydrator 2, and th...

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Problems solved by technology

[0006] In order to solve the technical problem that it is difficult to dehydrate the water-containing oil products with small difference in density between oil and water by using conventional removal methods such as sedimentation or coalescence, the inventor proposed a dehydration feed buffer on the basis of a lot of research and experiments. tank, greatly improving the oil dehydration effect

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