Industrial filter cloth materials are diverse, ranging from polypropylene, polyester, vinylon, and nylon. Which material of industrial filter cloth should be used for liquid-solid separation in the chemical, mineral processing, pharmaceutical, non-ferrous metal, environmental protection, desulfurization and other industries? The following 5 points are summarized, and I hope to help you.
1. According to the chemical and physical properties of the material, choose the material of industrial filter cloth.
2. The filter accuracy of the filter cloth
Select the permeability of the filter cloth according to the requirements of filtration accuracy. Although the filter cloth plays an important role in the initial filtration accuracy of the filter press, the initial filtration accuracy is not as high as possible. Because the filter press forms a filter layer after filtering for a period of time, the retention effect of the filter cloth is very small, and the filter layer plays the role of fine filtration. The formation of a good filter layer is the key to the technology of the filter device.
3. The peeling performance of the filter cake
When choosing industrial filter cloth, pay special attention to the peeling performance of the filter cake. The surface of the filter cloth is smooth and flat, the filter cake peels off quickly, the operation time of thorough filtration is short, and the efficiency is high. The filter cake adheres to the filter cloth and is not easy to peel off, which will extend the operating time of the filter press. If you want to replace the filter cloth, it will take longer. Choosing monofilament filter cloth has better cake unloading performance than long multifilament and short fiber filter cloth, and choosing satin weave has better cake unloading performance than plain weave.
4. The regeneration performance of the filter cloth
When choosing filter cloth, pay attention to choosing industrial filter cloth with good regeneration performance. The filter cloth with good regeneration performance can be washed directly on the filter press to reduce the number of cloth changes. The filtration efficiency of the filter cloth is restored to 80% after a brief treatment (washing, drying, etc.).
4. Material filtration experiment
After the initial selection of industrial filter cloth, it is very important to perform filtration experiments on the raw materials (without changing the nature of the materials and the process conditions). Carry out a sample experiment on material filtration to investigate the filtration rate, retention effect, filter cake moisture content, cake unloading performance, and regeneration performance of industrial filter cloths.