How to Improve The Working Efficiency of Hydrocyclone?

Date: 2021-06-05     From: Longding     Author: admin

Hydrocyclone is a kind of separation and classification equipment, which can effectively complete the operations of liquid clarification, sand removal, solid phase particle washing, and classification. So how to improve the working efficiency of hydrocyclone?

1. Improve the structure of the overflow pipe

The overflow pipe structure design of the cyclone is unreasonable, and there will be short-circuited flow phenomena, which will cause the overflow of the cyclone to run thick, and the separation of coarse and fine particles in the product will be mixed, which will directly affect the flow rate of the cyclone.

Solution

A. Adding some ring teeth on the outer wall of the overflow pipe can greatly reduce or even eliminate the short-circuit flow. After adding ring teeth to the outer wall of the overflow pipe, the separation accuracy index of the cyclone is 1.8 times higher than that of the ordinary cyclone.

B. An annular gap can be opened between the top cover of the cyclone and the overflow pipe to lead out the short-circuit flow, which can effectively reduce the mixing of coarse particles in the overflow product.

C. Adding a reverse spiral on the outer wall of the cyclone overflow pipe that is opposite to the short-circuit flow rotation direction can effectively solve the 10%-20% short-circuit flow problem of the cyclone treatment liquid and improve the separation efficiency.

D. Increasing the thickness of the overflow pipe wall of the cyclone can lengthen the path of the short-circuit flow and reduce the flow of the short-circuit flow. It can effectively improve the separation efficiency of the cyclone.

2. Improve the wall structure of the cyclone

After the cyclone is used for a long time, the wall will form a wall boundary layer, which will shield the fine-grained materials and affect the classification efficiency of the cyclone.

Solution

A. Changing the cyclone into a stepped wall can break the shielding of fine particles by the boundary layer of the sidewall through the loop on the wall.

B. The porous material wall is inflated into the cyclone, so that the content of fine particles in the underflow is relatively reduced by 30% to 50%.

C. Setting tooth-like grooves on the surface of the cyclone cone can effectively destroy the boundary layer of the wall and promote the formation of a certain strength of the vortex of the slurry, which is more conducive to the fine particles leaving the boundary layer and entering the overflow area, improving the separation accuracy.

3. Eliminate the air column in the cyclone

There is no separate process inside the air column in the cyclone, and it also occupies the flow area of the overflow port. The fluctuation of the size and position of the air column aggravates the instability of the flow field, thereby reducing the separation efficiency of the cyclone.

Solution

A. Use an appropriate amount of solid rods to occupy the original air column position in the cyclone to improve the separation performance.

B. Changing the gas flow in the cyclone can effectively reduce the turbulent energy consumption at the center, the velocity gradient of the fluid at the center of gravity, and the fluid velocity at the overflow port. It not only improves the separation efficiency by 15%, but also reduces the operating energy consumption by about 40%.