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Selection method of filter media in filter press

Feb 16, 2021

The selection method of filter media in the filter press is mainly selected according to the characteristics of the filter press. Moreover, today’s filter presses are widely used in many industries such as chemical, pharmaceutical, metallurgy, dyes, food, brewing, ceramics, and environmental protection, and are classified as chamber filter presses, plate and frame filter presses, and belt presses. Filters, vertical filter presses, membrane press filter presses, etc., so the selection of filter and filter press filter cloth requires scientific methods.

(1) To consider the chemical and physical properties of the material, choose the material of the filter cloth. You must carefully understand the specific information provided by the fabric merchant. To

(2) Need to meet the filtration accuracy of the filter press, that is, the permeability of the filter cloth. 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. It is only necessary to consider that the filtration accuracy can meet the lower requirements. After the filter press forms a filter layer after filtering for a period of time, the retention effect of the filter cloth is very small. The formation of a good filter layer is the key to the technology of the filter press. 

(3) The peeling performance of the filter cake also requires special attention when selecting filter cloth. Generally speaking, the surface of the filter cloth is smooth and flat. The faster the filter cake peels off and the shorter the operation time for thorough filtration, the higher the efficiency. 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 and reduce the work efficiency. But when replacing the filter cloth, it takes a lot of time and energy. 

(4) When choosing filter cloth, pay attention to choosing 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 filter efficiency of the replaced filter cloth is restored to more than 80% after simple treatment (drying, washing, etc.). 

(5) Afterwards, the special consideration is to carry out a filtering experiment on the selected filter cloth, because the use technology of the filter press is an experimental technology. Carry out a sample experiment on material filtration. Investigate the filtration rate, retention effect, filter cake moisture content, cake unloading performance, regeneration performance, etc. of the filter cloth.