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The significance of measuring various performance indexes of filter cloth
Time:2018-3-21    Clicks: 632
Breaking strength is an indicator of the tensile performance of the filter cloth. This indicator can reflect the ability of the filter cloth to withstand the external pull force. Especially in some filter equipment, such as belt vacuum filter, folding belt type Drum vacuum filters, etc., filter cloths are subjected to greater tensile forces, and when selecting filter cloths for these devices, the tensile properties are particularly important.
The elongation of the filter cloth is an indicator of the elastic deformation performance of the filter cloth. On some filtration equipment such as the chamber filter press and the plate filter press, the filter cloth will be subjected to certain Squeezing force deforms. When choosing a filter cloth for these devices, the elongation should be taken into account. Wear resistance is an indicator that reflects the loss of filter cloth. For filter cakes, plate and frame filters or chamber filter presses where the filter cake is unloaded with a squeegee, although the tension on the filter cloth is small, it is at the feed port, where the filter cloth and the frame are joined. There is a certain amount of friction, and wear becomes the main reason for failure of the filter cloth. When choosing a filter cloth for this type of equipment, wear resistance is an important indicator.
Permeability and water permeability reflect the resistance of the filter cloth to the fluid. Breathability and permeability performance can reflect the initial filtration rate of the filter cloth, and the filtration rate is an important indicator that affects the production efficiency of the filtration equipment. In actual production, it is necessary to improve the filtration efficiency of the equipment. Filter cloth with low fluid resistance should be selected. The bubbling pore size can indirectly reflect the ability of the filter cloth to retain the solid phase particles and the uniformity of the pore size of the filter cloth. The bubbling pore size has two values, the maximum bubbling pore size and the boiling bubbling pore size. The maximum bubbling pore size is used to describe the retention properties of the filter cloth; the ratio of the boiling pore diameter and the maximum bubbling pore size is used to describe the uniformity of the pores of the filter cloth. In the production of high filtration accuracy, this indicator is more important when filter cloth is selected.
The determination of the pressure and vacuum filtration performance is to determine the filtration rate at the initial stage of filter cloth filtration, which can reflect the adaptability of the filter cloth to the material. This indicator is very important for improving the production capacity of pressurized and vacuum filtration equipment. The maximum particle size can directly reflect the ability of the filter cloth to retain particles. In actual production, this performance is particularly important when the filtration of low-concentration slurry or the clarity of the filtrate is required to be high.
Peeling performance is to determine the adhesion stress between the filter cloth and filter cake, and its size directly reflects the difficulty of the filter cake detachment from the filter cloth. It is difficult to study the filter cake peelability, some foreign filter cloth manufacturers can not be quantitatively proposed The filter cake peelability data was qualitatively evaluated only for good, medium, and poor. This topic proposes that the concept of sticking stress is to describe the peeling performance of filter cake in a definite manner. The size of this indicator will affect the recovery rate of the solid phase in production, the production efficiency of the equipment, and the normal operation of the equipment. Therefore, the peeling performance is very important in the selection of filter cloths.
The regeneration performance is to determine the regeneration efficiency of the filter cloth, which can reflect the fact that the filter cloth is still blocked by the solid particles after regeneration in the filtration process. In the past, there was no definite quantitative evaluation of the regeneration performance of the filter cloth. This topic proposes the concept of the regeneration efficiency and quantitatively describes the regeneration performance of the filter cloth. This indicator has a great influence on the production efficiency of the equipment and is an indicator that can not be ignored in the selection of filter cloths.

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