High-efficiency oil removal settling tank for oilfield produced water treatment

Abstract

The invention discloses an efficient oil removal settling tank for oilfield produced water treatment. The efficient oil removal settling tank comprises a tank body, wherein an oil-water separation cavity and a settling cavity are respectively formed in the top and the bottom of the tank body, a hot air inlet is formed in the top in the tank body, a hot air exhaust pipe is installed at the bottom of the hot air inlet, a filter plate is installed at the bottom of the oil-water separation cavity, a center rod is installed in the middle of the upper surface of the filter plate, the top of the center rod is sleeved with a sliding block, and a rigid oil collecting pipe is installed on the front side of the sliding block. According to the invention, by arranging the hot air outlet pipe at the bottom of the hot air inlet and arranging the oil collecting disc at the top of the rigid oil collecting pipe, hot air conducts heat preservation and heating on emulsified oil, crude oil, dispersed oil and other oil layers floating on the top in the tank body through the hot air exhaust pipe of the hot air inlet, so that the phenomena that the temperature of the oil layers is too low, the paraffin components in the oil layers are prone to coagulation, the oil collecting disc is blocked, and normal oil-water separation work is affected are avoided, and the efficient oil removal settling tank is practical and suitable for wide application and popularization.

Description

technical field [0001] The invention relates to the technical field of oil-water separation in oilfields, in particular to a high-efficiency oil-removing settling tank for oilfield produced water treatment. Background technique [0002] At present, natural settlement tanks are commonly used for oil-water separation in oilfield produced water treatment. Natural settlement tanks include tanks, oil collection tanks, water distribution systems, and water collection systems. The oily sewage is settled in the settling tank for a period of time, and the purpose of oil-water separation is realized by using the density difference of oil and water. [0003] There are still some deficiencies in the existing high-efficiency oil-removing settling tanks for the treatment of produced water in oilfields. For example, the external temperature is too low, which leads to a decrease in the temperature of the oil layer in the tank, and the paraffin components in the oil layer are prone to conden...

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Problems solved by technology

[0003] There are still some deficiencies in the existing high-efficiency oil-removing settling tanks for produced water treatment in oilfields. For example, the external temperature is too low, which leads to a decrease in the temperature of the oil layer in the tank, and the paraffin components in the oil layer are prone to condensation, which will block the oil collector. The oil layer cannot be discharged in time, and most of the existing settling chamber and oil-water separation chamber are in the same chamber. When the rigid bubble tube of the dissolved air pump produces bubbles in the oilfield produced water, a small amount of lighter impurities will follow the bubbles and roll upwards, affecting crude oil extraction. purity and so on

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