Breaking strength is an indicator of the tensile properties of the filter cloth, which can reflect the ability of the filter cloth to exert a tensile force on the outside, especially on some filter equipment such as belt vacuum filters, Drum vacuum filter, etc., the filter cloth to withstand greater tension, filter cloth for the selection of these devices, the tensile properties is particularly important.
The elongation of the filter cloth is an indicator of the elastic deformation performance of the filter.In some filtration equipment, such as the filter press and box-type filter press filter operation, the filter will be a certain amount of Squeeze pressure and deformation. When choosing a filter cloth for these devices, the elongation should be taken into account. Abrasion resistance is a reflection of the failure of filter cloth an indicator. Such as the discharge scraper to remove the filter cake filter, plate frame filter or box filter, although the tension of the filter cloth is small, but at the inlet, the filter cloth and rack joints are A certain degree of friction, wear and tear to become the main reason for the failure of the filter cloth. Abrasion resistance is an important indicator when choosing filter cloths for this type of equipment.
Breathability and water permeability reflect the size of the fluid resistance of the filter cloth.Permeability and water permeability can reflect the initial filtration rate of the filter cloth, the filtration rate is an important indicator of the efficiency of the filtration equipment. In actual production, to improve the filtration efficiency of the equipment, we should choose the filter cloth with small fluid resistance. Bubble pore size can indirectly reflect the ability of the filter cloth to retain solid particles and the uniformity of the filter cloth aperture. The bubble diameter has two values, namely, the maximum bubble diameter and the boiling bubble diameter, the maximum bubble diameter describes the retention of the filter cloth, and the ratio of boiling aperture to the maximum bubble diameter describes the uniformity of the pore of the filter cloth. In the production of high precision filtering requirements, filter selection, this indicator is more important.
Pressurization, vacuum filtration performance measurement is to determine the initial filtration rate of filter cloth, which can reflect the ability of the filter cloth to adapt to the material. This indicator is important to improve the productivity of pressurized and vacuum filtration equipment. The maximum through the particle size can directly reflect the ability of the filter cloth to retain particles. In actual production, for the low concentration of the slurry filter or filtrate clarity requirements are higher, this performance is particularly important.
Peeling performance is the determination of the adhesive stress between the filter cloth and the filter cake, the size of the filter cake directly reflects the ease from the filter cloth.Research on the peel cake is more difficult, some foreign filter cloth manufacturers can not be quantitatively proposed Filter cake peel performance data, only good, medium and poor to qualitative evaluation. The concept of adhesion stress proposed in this paper is to describe the performance of filter cake stripping freely. The size of this indicator will affect the recovery of solid phase production, equipment production efficiency and equipment can operate normally. So when the filter cloth selection, peel performance is very important.
Regeneration is the determination of the regeneration efficiency of the filter cloth, which can reflect the regeneration of the filter is still blocked by the solid particles of the filter. In the past, there was not a clear quantitative evaluation of the regeneration performance of the filter cloth. The concept of regeneration efficiency was proposed in this project, and the regeneration performance of the filter cloth was quantitatively described. This indicator has a great impact on the production efficiency of the equipment, which is an index that can not be ignored when selecting the filter cloth.
(Addtime：2018-1-21)
