A nested gas-liquid-solid cyclone separation device

Abstract

A nested gas-liquid-solid cyclone separation device. It is characterized in that: the outer sleeve contains a gas phase separation module, a liquid phase separation module and a solid phase separation module, and the gas-liquid-solid three-phase mixture enters the cyclone separation device from the liquid inlet of the outer sleeve and passes through the gas phase separation module The nested outer helical flow channel and inner helical flow channel make the gas phase be discharged preferentially, while the separated liquid phase passes through the inside of the helical flow channel, the return control unit, and then returns to the outer sleeve, and then passes through the liquid phase separation module. The flow discharges the overflow of the lighter density in the three-phase mixed liquid, the sand phase surrounds the inner wall of the outer sleeve, and finally passes through the solid phase separation module to separate the sand phase, and the underflow liquid flows out through the inner sleeve. This kind of cyclone separation device can process the three-phase mixed liquid and realize the single-phase separation of gas phase, solid phase, overflow liquid and underflow liquid.

Description

technical field [0001] The invention relates to a gas-liquid-solid three-phase cyclone separation device applied in the fields of petrochemical industry and water treatment. Background technique [0002] With the continuous exploitation of the oilfield, the problem of sand and gas in the oilfield produced fluid is becoming more and more serious. The gas contained in the produced fluid will not only increase the cost of artificial lift, but also cause the accompanying gas if not properly treated. It will have an impact on the environment, and more importantly, it will seriously affect the efficiency of injection-production cyclone separation in the same well of high water-cut oilfields. If the gas contained in the mixed liquid can be collected and recycled, inefficient cyclone separation will be avoided, and at the same time, it will be reduced. On the other hand, the problem of sand content should not be underestimated. A certain amount of sand content will affect the effici...

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Problems solved by technology

[0002] With the continuous development of oilfields, the problem of sand and gas in the oilfield production fluid is becoming more and more serious. The gas contained in the production fluid will not only increase the cost of artificial lifting, but also the associated gas will be damaged if it is not properly treated. It will have an impact on the environment, and more importantly, it will seriously affect the efficiency of the injection-production cyclone separation of the same well in high water-cut oilfields. If the gas contained in the mixed liquid can be collected and recycled, the low-efficiency cyclone separation will be avoided, and at the same time it will reduce On the other hand, the problem of sand content should not be underestimated. A certain amount of sand content will affect the separation efficiency, and a large amount of sand content will cause silting and clogging. Therefore, it is necessary to develop a gas-liquid-solid three-phase Separation device, usually the gas-liquid-solid three-phase separation cyclone uses the density difference between the phases for cyclone separation, such as the three-phase separation cyclone, patent number: 2015108694142, the device designed by this invention patent can realize gas-liquid-solid Three-phase separation, but there are still many deficiencies. First of all, the helical structure of the device to achieve solid phase separation is complicated and difficult to realize. More importantly, the device cannot realize the separation between underflow and overflow that are both liquid phases. , which requires the development of a multifunctional cyclone separation device capable of sand removal, exhaust, underflow separation, and overflow separation

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