Solid-liquid separation is an important unit operation, and its technical level directly affects the advancement and reliability of large-scale and process-based production in the pharmaceutical and chemical industry, as well as production capacity, energy consumption, environmental protection and economic benefits. The centrifuge is a mechanical device that uses centrifugal force to achieve solid-liquid separation, so the importance of the centrifuge is self-evident.
At present, according to the classification of filter media, centrifuges can be divided into media-type centrifuges and non-medium-type centrifuges. Among them, a centrifuge that relies on a filter cloth or a filter screen to achieve separation through the action of centrifugal force is a media-type centrifuge.
The difference between a non-medium centrifuge and a media-containing centrifuge is that there is no hole or filter (cloth) on the drum. When it is working, the suspension rotates at a high speed in the drum. Due to the different specific gravity of the solid and liquid phases, The centrifugal force generated is also different, and the separation of solid and liquid is realized.
With the emergence of new industrial centrifuge types, we might as well recall the development history of centrifuges.
Industrial centrifuges were born in Europe. After the first industrial revolution in the 18th century, with the rapid development of the textile industry, a three-foot centrifuge for cotton dewatering appeared in 1836. In 1877, in order to meet the needs of the cheese processing industry, it was invented A cream separator used to separate milk.
After entering the 20th century, with the development of comprehensive utilization of petroleum, a disc-type piston slag separator with automatic slag discharge was successfully developed in the 1950s. In recent years, with the development of environmental protection, three wastes treatment, and pharmaceutical and chemical development needs, various new types of centrifuges have also emerged.
Throughout the history of the development of centrifuges, it has evolved and evolved with the continuous progress and development of modern industry.
The first industrial revolution, the birth of the centrifuge, realized mechanized production;
In the second industrial revolution, the invention of the electric motor made the centrifuge electrify;
In the third industrial revolution, with the birth of automatic control systems such as PLC, DCS, and frequency converters, centrifuges entered the era of automation and information;
At the moment, Germany put forward the "Industry 4.0 Strategy" at the Hannover Messe. In 2014, our country put forward the "Made in China 2025" concept. The centrifuge will also adapt to the times and move towards a digital and intelligent era.
In the new round of the industrial revolution, how the development of centrifuges can respond to international competition and how to achieve overtaking in corners requires us all to be creative, work together, and move forward together.