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What is the working principle of hydrocyclone in wet desulfurization?

Author: Time: August 7, 2020 124 views

Hydrocyclone is a kind of device which uses fluid pressure to produce rotary motion. When the slurry enters the cyclone at a certain speed, it is forced to rotate when it meets the wall of the cyclone.

Due to the different centrifugal force, the solid coarse particles in the slurry have large centrifugal force, which can overcome the hydraulic resistance and move downward along the vessel wall under the joint action of its own gravity. The fine and small particles and most of the water will rotate with the slurry before reaching the wall due to the small centrifugal force. Driven by the subsequent feeding, the slurry continues to move downward and rotary, so the coarse particles continue to concentrate to the periphery, while the fine particles stay in the central area. The particle size increases from the center to the wall, forming a layered arrangement.

With the slurry from the Hydrocyclone The cylinder part flows to the cone part, and the flow section becomes smaller and smaller under the compression of the outer slurry.

 Hydrocyclone

The inner layer slurry containing a large number of fine particles has to change its surface direction and move upward to form an internal swirling flow, which is discharged from the overflow pipe and becomes overflow. The coarse particles continue to move downward along the wall of the separator to form an outer swirling flow, which is finally discharged from the underflow port and becomes grit.

Hydrocyclone is a common separation and classification equipment, commonly used centrifugal sedimentation principle. When the two-phase mixture to be separated enters the hydrocyclone tangentially from the periphery of the hydrocyclone at a certain pressure, a strong three-dimensional elliptical strong rotational shear turbulent motion is produced. Due to the difference in particle size between coarse and fine particles, they are subject to different sizes of centrifugal force, centripetal buoyancy and fluid drag. Due to centrifugal sedimentation, most of the coarse particles are discharged through the bottom flow port of the cyclone, while most of the fine particles are discharged by the overflow pipe, so as to achieve the purpose of separation and classification.