Don’t underestimate this small piece of invisible cloth. In fact, in the use of the filter press, the filter cloth plays a very important role. It can even be said that it directly affects the filtering effect of the filter press, so When using a filter press, you need to choose a filter cloth suitable for the equipment itself, so as to further ensure the filtration accuracy.
In the filter press, the filter cloth plays the role of intercepting solids and dialysis liquid, and also supports the filter cake of the filter chamber, so the selection of filter cloth is very important. The filter cloth is roughly divided into the following three types.
First: woven filter cloths or filter nets such as woven filter cloths are the most used in the industry. Such filter cloths are woven from natural or synthetic fibers, fine metal wires and other materials. Such filter cloths The advantage is that the composition is clear, the results and performance are stable, and there will be no secondary pollution to the liquid. It can also be flexibly produced according to different equipment, easy to process, and the pore size of the filter cloth can be large or small, so more than 85% of the filter cloth of the current industrial filter press is like this.
Second: Stacked filter cloth This type of filter cloth is used less, and is made of some particles with high adsorption capacity. Such particles include: diatomaceous earth filter plate. An important disadvantage of such filter media is poor dialysis. Therefore, it can only be used for liquid filtration containing a small amount of solid particles.
Third: The uniform characteristic of industrial filter paper or polymer porous filter membrane is that the air inlet is extremely small, as small as a few nanometers, so such filter cloth is used to intercept and filter tiny particles to obtain a very clear filtrate. . That is to say, such filter cloths are used in industries with high requirements for filtrate, such as pharmaceutical, food processing and biochemical industries.