Double rotating grid composite hydrocyclone

Abstract

The invention discloses a double-rotary-grid combined type hydrocyclone. The special mode that two rotary grids are nested together is adopted, a centrifugal force field of outer vortex and a centrifugal force field of inner vortex of the hydrocyclone are enhanced, and the separation level of the hydrocyclone is improved. In addition, a series of adverse effect such as mixing caused by mechanical shock of the dynamic hydrocyclone, excessive turbulence intensity of a flow field due to a rotary part and coarse size caused by air column turbulence at an underflow orifice can be eliminated through the nested rotary grids. The double-rotary-grid combined type hydrocyclone is suitable for solid-liquid phase separation and liquid-liquid phase separation with high requirements for separation efficiency, separation precision and handling capacity.

Description

technical field [0001] The invention relates to a multi-phase system centrifugal separation and classification device, which is suitable for high-efficiency and high-precision separation of solid-liquid phase and oil-water phase. Background technique [0002] The hydrocyclone is a kind of centrifugal separation equipment, which realizes the separation of two or more phases according to the density difference between the two or more phases under the action of centrifugal force. Since the strength of the centrifugal force field is much greater than that of the gravity field, the separation efficiency of the hydrocyclone is much greater than that of the gravity separation equipment. Since the application of the first hydrocyclone patent in 1891, the history of hydrocyclones has passed more than a century. Today, hydrocyclones are widely used in many industries such as minerals, chemicals, machinery, medicine, biology, and food. [0003] At present, hydrocyclones can be genera...

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Problems solved by technology

[0005] However, there are still some deficiencies in the dynamic hydrocyclone: ​​the outer drum of the full-motion hydrocyclone will rotate at high speed during operation, and the mechanical error of the drum will cause the vibration intensity of the cyclone to be too large, and the internal flow of the cyclone The field will be unstable due to vibration, and secondary mixing will occur, which will affect the separation accuracy of the cyclone

[0008] Compared with the static hydrocyclone, the dynamic hydrocyclone mainly enhances the centrifugal force field of the external swirl flow through the rotating components, which strengthens the centrifugal settlement of the liquid in the hydrocyclone in the outer swirl area, but the centrifugal force of the inner swirl flow The effect has not been effectively enhanced

Moreover, the mechanical vibration of the dynamic hydrocyclone cannot be avoided and can only be weakened. The existence of mechanical vibration will inevitably cause a certain degree of secondary mixing phenomenon, thereby reducing the separation accuracy of the hydrocyclone.

When the rotating components of the dynamic hydrocyclone rotate at high speed, the turbulence intensity of the fluid inside the hydrocyclone will be increased, and too strong turbulence will also reduce the separation accuracy of the hydrocyclone

In addition, the phenomenon of overflow coarsening will also have an adverse effect on the separation operation of the cyclone. Although the use of the rotating impeller cyclone can effectively suppress the overflow coarsening caused by the short-circuit flow under the cover, the bottom flow port of the cone section of the cyclone The phenomenon of rough running caused by the turbulence of the air column has not been eliminated

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