In the daily industrial production of filter presses, our most common problem is how to choose the filter cloth suitable for your industry? How to choose the filter cloth of different types of filter press? These issues are what we say today! In general, we are choosing filter press filter cloth according to our requirements and the nature of the filter, that is, the stripping property, chemical and physical properties of the material; the drying property of the filter cake after filtration; Wait, let's take a look at this one below. First of all. The most important thing for us is to consider the nature of the filter. Its factors account for more than 75% of the importance of the filter cloth in the filter press. A. The peeling performance of the filter residue directly affects the working efficiency of the filter press equipment. The surface of the filter residue is smooth and non-blocking type, and the filtrate will quickly ooze out from the medium filter cloth, and the filtration time period is high. On the contrary, the filter residue has blocking properties, the filtration time will be long, and the efficiency will of course be correspondingly reduced. Moreover, the stronger the adhesion, the lower the efficiency. At this time we have to choose a monofilament filter cloth or satin weave filter cloth. B. According to the chemical properties such as acidity and alkalinity of the filtrate, different acid and alkali levels are selected to suit the filter cloth type. The strongest acid resistance is polyester filter cloth, and the most resistant to alkali is vinylon filter cloth. The acid and alkali resistance is also the polypropylene filter cloth. C. The shape of the filter residue, whether the particles are uniform, and whether the shape is hard, so as to consider the wear resistance of the filter cloth. Uneven size and diamond angle, depending on the degree. The best wear resistance is the strip filter cloth and the warp filter cloth. D. The temperature and temperature of the filter are also the filter cloth and working efficiency of the filter press. The highest temperature resistance is the strip filter cloth. Again, it is our request, we want the efficiency of the filter press and the degree of dryness of the filter residue. The regeneration performance of the filter cloth. When selecting the filter cloth, pay attention to the filter cloth with good regeneration performance. The filter cloth with good regeneration performance can directly wash the filter cloth on the filter press to reduce the number of times of changing. The filter cloth after replacement is easily treated (dry, washed, etc.) and the filtration efficiency is restored to 80% or more. Therefore, depending on the specific conditions, the temperature of the filtrate, pH, and filtration are all selected. The properties of the four commonly used filter cloths are listed below. performance Polyester Nylon Polypropylene Weilun Acid resistance Strong Poor good Not resistant to acid Alkali resistance Weak base good Strong Strong alkali resistance Conductivity Very poor better good general Elongation at break 30%-40% 18%-45% Big and polyester 12%-25% Responsiveness well Recovery rate of 90% or more at 10% elongation Slightly better with polyester Poor Wear resistance well well it is good better Heat resistance 170 °C Slightly shrink at 130 °C Slightly shrink at 90 °C 100 °C shrinkage Softening Point 230 -240 °C 180 °C 140 -150 °C 200 °C Melting point 255 -265 °C 210 -215 °C 165 -170 °C 220 °C
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How to choose the filter cloth filter that suits you?