Oil-containing sewage cyclone flotation evaluation device and method using same

A swirling air flotation and sewage technology, which is applied in the field of multiphase separation of oil and gas gathering and transportation systems, can solve problems such as production decline, ecological environment pollution, formation blockage, etc., and achieve the effects of compact structure, simple process, optimized design and efficient operation

Active Publication Date: 2016-06-22
CHINA UNIV OF PETROLEUM (EAST CHINA)
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Problems solved by technology

Oily sewage directly re-injected into the formation will lead to clogging of the formation and reduce the water absorption of the formation, resultin

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  • Oil-containing sewage cyclone flotation evaluation device and method using same
  • Oil-containing sewage cyclone flotation evaluation device and method using same

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[0020] see attached figure 1 , 2 , a swirl air flotation evaluation system for oily sewage, characterized in that it includes a gas introduction pipeline, a sewage pipeline, a bubble preparation pipeline and a swirl air flotation device, wherein the swirl air flotation device includes a swirl cylinder 23 with an inner cylinder 25 , and the swirl tube 23 is coaxially arranged with the inner tube 25, the top of the swirl tube 23 is provided with a speed-regulating motor 27 for driving the inner tube 25, and the top of the swirl tube 23 is provided with a water injection port with a valve I (22) 21 and the exhaust port 28 with the valve J (29), the oil skimmer 24 and the air distribution plate 32 are also arranged in the swirl cylinder 23, and the oil skimmer 24 and the air distribution plate 32 are respectively located above and below the inner cylinder 25, The side of the cyclone 23 is provided with a sewage outlet 26, an oil discharge port 31 with a valve K30 and a treated...

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Abstract

The invention provides an oil-containing sewage cyclone flotation evaluation device and a method using same. The oil-containing sewage cyclone flotation evaluation device comprises air floatation equipment, gas dissolving equipment, etc. The air floatation equipment comprises a cyclone cylinder, a speed adjusting motor, an inner cylinder, etc. The inner cylinder rotates for making sewage perform cyclone motion and forming a cyclone field which is uniform in the axial direction. The rotation speed of the inner cylinder is adjusted through the speed adjusting motor for realizing cyclone strength change, thereby evaluating effect of the cyclone strength to cyclone flotation de-oiling performance. The gas dissolving equipment comprises a multiphase gas dissolving pump, an expanding tube, etc. Through adjusting the flow and the pressure of the gas dissolving pump, parameters such as bubble diameter and dissolved gas amount are controlled for evaluating effect of a bubble characteristic to the cyclone flotation de-oiling performance. Through detecting oil content change of the sewage at the sampling opening of the air floatation equipment before and after testing, the effect of cyclone strength and bubble characteristic to the cyclone flotation de-oiling performance is evaluated. The oil-containing sewage cyclone flotation evaluation device and the method using same can realize optimization for key parameters of a cyclone flotation process, thereby laying the foundation for optimized design and high-efficiency operation of cyclone evaluation equipment.

Description

technical field [0001] The invention relates to a swirl air flotation evaluation device and method for oily sewage, which is used to evaluate the key parameters of the swirl air flotation process, such as swirl intensity, bubble particle size, and dissolved air volume, for oily sewage with different oil concentrations and oil droplet diameters. Multiphase separation technology field of oil and gas gathering and transportation system. Background technique [0002] Oilfields at home and abroad generally adopt the water injection production method, the water content of the oilfield produced fluid increases rapidly, and a large amount of oily sewage is produced. The direct reinjection of oily sewage into the formation will lead to clogging of the formation and reduce the water absorption of the formation, resulting in a decline in production. If the oily sewage is directly discharged without treatment, it will cause serious pollution to the ecological environment. Therefore, e...

Claims

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Application Information

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IPC IPC(8): G01D21/00
CPCG01D21/00
Inventor 罗小明何利民付浩吕宇玲杨东海
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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