(1) According to the chemical and physical properties of the material, choose the material of the filter cloth. The filter cloth suppliers are as far as possible to provide detailed technical information, refer to the choice.
(2) According to the filtering accuracy of the filter to choose the permeability (maximum retention particle size). Can refer to the filter cloth suppliers to provide the maximum cut-off size and other technical parameters of the primaries. Although the filter cloth filter on the initial filtration accuracy played a very important role, but the initial filtering accuracy is not as high as possible, to consider the filtering accuracy can reach the minimum requirements can be. Because the filter press filter after a period of time to form a filter layer, the filter cloth retention effect is very small, the real fine filter effect enough "filter layer" to form a good filter filter press is the key to the use of technology.
(3) cake peel performance. Pay special attention to filter cake stripping performance when choosing filter cloth. Smooth surface of the filter cloth, filter cake stripping quickly, complete filtration of the operating time is short, high efficiency. Cake adhesion in the filter cloth is not easy to peel, it will extend the filter press operating time and reduce work efficiency. If you want to change the filter cloth, time will be even more. Now commonly used van filter, filter cloth replacement are more troublesome. The choice of monofilament filter cloth than long multifilament and staple fiber filter cake unloading performance is better, choose satin weave than plain weave filter cake unloading cake performance better.
(4) filter cloth regeneration performance. Select the filter cloth should pay attention to select a good regenerative filter cloth. Regenerative performance of the filter cloth filter cloth can be directly on the filter to reduce the number of cloth change. Replacement of the cloth by simple treatment (drying, washing, etc.) filtration efficiency to 80% or more.
(5) material filtration experiment. The use of filter press technology is an experimental technique. After the initial selection of filter cloth on the original material (without changing the nature of the material and process conditions) for filtration experiments is very important. Material sample filtration experiment.Examine the filter cloth filtration rate, retention effect, cake moisture content, unloading cake performance, regeneration performance.
(Addtime：2018-1-18)
