Introduction to the "Xianghuibo" brand horizontal screw centrifuge

The horizontal screw centrifuge is a separation machine that uses the specific gravity difference between the material and the mother liquid to separate the components in the mixture of liquid and solid particles or liquid and liquid through centrifugal force.

The horizontal spiral centrifuge is mainly used to separate solid particles from liquids in suspension; Or separate two immiscible liquids with different densities in the emulsion (such as separating cream from milk); It can also be used to remove liquids from wet solids, such as using a washing machine to dry wet clothes; Taking advantage of the different settling speeds of solid particles with different densities or particle sizes in liquids, some settling centrifuges can also classify solid particles according to their density or particle size.

Horizontal spiral centrifuges are widely used in industries such as chemical, petroleum, food, pharmaceutical, mineral processing, sewage treatment, and environmental desulfurization.

Due to the improvement of the slag unloading mechanism, continuous operation centrifuges emerged in the 1930s, and intermittent operation centrifuges were also developed due to the implementation of automatic control.

Industrial centrifuges can be divided into three categories according to their structure and separation requirements: filter centrifuges, settling centrifuges, and separators.

The horizontal screw centrifuge has a cylinder that rotates at high speed around its own axis, called a drum, usually driven by an electric motor. After the suspension (or emulsion) is added to the drum, it is quickly driven to rotate at the same speed as the drum, and under the action of centrifugal force, each component is separated and discharged separately. Usually, the higher the drum speed and the longer the aspect ratio, the better the separation effect.

There are two working principles of horizontal screw centrifuges: centrifugal filtration and centrifugal sedimentation. Centrifugal filtration is the centrifugal pressure generated by the suspension in the centrifugal force field, which acts on the filtering medium, causing the liquid to pass through the filtering medium and become the filtrate, while solid particles are intercepted on the surface of the filtering medium, thus achieving liquid-solid separation; Centrifugal sedimentation is the principle of rapidly settling and layering components with different densities in suspension (or emulsion) in a centrifugal force field, achieving liquid-solid (or liquid-liquid) separation.

The important indicator for measuring the separation performance of a horizontal spiral centrifuge is the separation factor. It represents the ratio of the centrifugal force and gravity of the separated material in the drum. The higher the separation factor, the faster the separation speed and the better the separation effect. The separation factor of industrial centrifugal separators is generally between 100 and 4000. Another factor that determines the processing capacity of a centrifugal separator is the working area of the drum, which has a large working area and a large processing capacity.

Filter centrifuges and settling centrifuges mainly rely on increasing the diameter of the drum to expand the working surface on the circumference of the drum; In addition, the more detailed the separation of solid particles in the suspension, the more difficult it is to separate, and the amount of fine particles carried away in the filtrate or separation solution will increase. In this case, a centrifugal separator needs a high separation factor to effectively separate; When the viscosity of the liquid in the suspension is high, the separation speed slows down; The large density difference of each component in suspension or emulsion is beneficial for centrifugal sedimentation, while centrifugal filtration of suspension does not require a density difference of each component.

The selection of a horizontal spiral centrifuge requires a comprehensive analysis based on the size and concentration of solid particles in the suspension (or emulsion), the density difference between solid and liquid (or two liquids), liquid viscosity, the characteristics of filter residue (or sediment), and separation requirements, in order to meet the requirements for moisture content and filtration of filter residue (sediment)