Inner liquid tangential velocity of cyclone
Writer： admin Time：2020-11-10 16:12 Browse：℃
Since the advent of the cyclone, it has been widely used in mineral processing, petroleum, chemical, food, environmental protection and other fields due to its simple structure, small footprint, light weight, short processing cycle, and good separation performance. The emergence of the cyclone is based on its advantages of simple design and structure, such as small space and light weight, it has obtained the opportunity to be widely used in various industries. The main working principle of the cyclone is actually to separate materials. Today we are working with cyclone manufacturers to understand the tangential velocity of the inner liquid of the lower cyclone.
Oilfield cyclones mainly use oil-water mixtures to quickly enter the inside of the equipment using tangential velocity under the pressure of the equipment. Because the density of the light and heavy components of the oilfield mixture are different, their centrifugal force is also different.
Although the design structure of the cyclone is relatively simple, its separation process is still very complicated, and its separation effect will be affected by various factors. In the separation process of the cyclone, its tangential velocity is considered to be a very critical item in the three-dimensional velocity because the equipment is directly related to the centrifugal acceleration inside the equipment. As the axial position of the cyclone gradually moves away from the inlet, the amplitude of the tangential velocity of the equipment will also decrease. The tangential velocity is not completely axisymmetrically distributed. This is because the inlet of the cyclone is a single inlet, which causes the unevenness of the internal flow field.
The distribution law of tangential velocity on different axial sections is consistent, and the whole is like a solid core and forced vortex inside and a quasi-free vortex outside. Due to the static wall of the cyclone and the effect of the boundary layer, the tangential velocity near the wall is zero and starts to increase. Along the radius to the center, the tangential velocity first increases and then decreases, and the velocity at the center is the smallest, approaching Yu zero.
As the axial position is farther away from the inlet, the amplitude of the tangential velocity becomes smaller. It can also be seen from the figure that the tangential velocity is not completely axisymmetrically distributed. This is because the inlet of the cyclone is a single inlet, which causes the unevenness of the internal flow field.
The oil-water mixture enters the cyclone at high speed tangentially from the inlet under pressure. Because of the different densities of the light and heavy components in the mixture, the centrifugal force they are subjected to is different. The underflow port exits the cyclone, and the light component oil phase will move to the center axis of the cyclone, and the upwardly moving internal swirling flow will be discharged from the overflow port to achieve the purpose of oil-water separation.
Although the cyclone has a simple structure, its separation process is quite complicated, and it is affected and restricted by various factors. In the cyclone separation process, the tangential velocity is considered to be the most important item in the three-dimensional velocity, because the tangential velocity determines the centrifugal acceleration and centrifugal force of the fluid inside the cyclone. The following figure shows a schematic diagram of the distribution of the tangential velocity Vt of the liquid flow in the cyclone along the radius R. Four cross-sections of z 450, 750, 1050 and 1300 along the direction of the cyclone column are selected for analysis along the radius.
The inner liquid tangential velocity of the cyclone, if you have any questions, you can continue to pay attention to us. If you have any questions about the cyclone, you can refer to other content on this site, or call for detailed inquiry.