How do you separate a solid from a liquid?

A filter screen is a common physical separation device, mainly used to separate liquids and solids that are mixed together. During the filtration process, the liquid passes through the pores of the filter screen, while the solid cannot pass through the pores of the screen and is intercepted. In this way, the liquid flows out of the filter screen, while the solid remains on the screen to achieve the effect of separation.

The action mechanism of the filter screen is completed by the selection of the size and shape of the screen pores and the density of the screen material. Generally speaking, the pore size of the filter screen and the size of the solid particles should be properly matched. If the pore size is too large, the solid particles will pass through and cannot be separated. At the same time, the density and structure of the screen material will also affect the effect of the filter screen. It is usually made of different materials, such as metal, plastic, fiber, etc., to meet the filtration requirements of different substances.

There are generally two ways to use the filter screen: one is to pour the mixed liquid directly above the screen, let the liquid flow out from the pores of the screen, leaving solid particles; the other is to put the screen on the filter funnel, Then pour the mixed liquid into the funnel, let the liquid flow out from the mouth of the funnel, and leave the solid particles on the sieve.

Of course, the filter screen is not suitable for all occasions of separating liquid and solid substances. For suspended liquids with small and dispersed particles, it is difficult to completely separate them using a filter sieve, and other methods, such as centrifuges and ultrafiltration, are required. For solid substances with larger particles and higher density, it is necessary to use a filter screen with coarse pores, otherwise the screen will be blocked and the separation effect will be affected.

In short, the filter screen is a simple and effective method of separating liquid and solid substances, which is not only widely used, but also easy to operate and maintain. In actual production, filter screens are also widely used in food, medicine, chemical and other industries to ensure product quality and safety.