Filter-press plate for filter-press unit

Abstract

The invention provides a filter-press plate for a filter-press unit. The filter-press plate can be used for keeping liquid penetration smoothness of filter cloth, and prolonging the service life of the filter cloth. The plate surface of the filter press plate is provided with small embossments, and diversion areas surrounding the small embossments are distributed in a zigzag form. Compared with the prior art, the filter-press plate has the advantages that the filter cloth is supported sufficiently in longitudinal and latitudinal directions through the diversion areas which are distributed in the zigzag form, and the situation that the filter cloth cannot be supported at a long distance in a certain direction is avoided, so that the liquid penetration smoothness of the filter cloth is ensured, and meanwhile, the service life of the filter cloth is prolonged.

Description

technical field [0001] The invention relates to dewatering and filtering equipment in the field of sludge treatment, in particular to a filter press plate of a filter press unit. Background technique [0002] In the sludge dewatering treatment, a large amount of press-filtrate will be filtered out during the process of forming a mud cake with a low water content after the sludge is dewatered by a filter press. During the extrusion process, the mud cake will be closely attached to the filter plate assembly. Even after the filter plate assemblies of each layer are separated, there will still be a large amount of mud cake that cannot fall off from the filter plate assembly. It is necessary to manually produce the attached mud cake, which will seriously affect equipment efficiency. [0003] In the prior art, small protrusions are evenly spaced on the surface of the filter plate body, and when the oil cylinder is pressurized, the water squeezed out from the mud flows through the...

AI Technical Summary

Problems solved by technology

The plate surface of the filter press plate is mostly a round or square plate as the main structure. The function of the small convex column is originally to support the filter cloth and form a drainage channel around the small convex column. However, due to the limitation of processing in the prior art Influenced by convenience, the small bosses are arranged as figure 1 In the scheme shown, there is no small convex column in the area shown by the dotted line Ⅰ-Ⅰ, Ⅱ-Ⅱ, Ⅲ-Ⅲ direction, and the filter cloth in this area has no support, and this area extends over the entire plate of the filter plate. On the surface, and the diversion area parallel to the direction of the dotted line above also has the same problem. For convenience, the above diversion area is called a straight-through diversion area.

The above scheme has the following problems: one is that during the filter press process, the filter cloth corresponding to the above-mentioned straight-through diversion area will be attached to the plate surface of the filter press plate, which blocks the drainage path of sewage or at least prolongs the drainage path of sewage , increasing the drainage resistance; the second is that during the filter press process, the sludge sticks to the filter cloth along the straight-through diversion area to form sludge ribs. Due to the formation of many sludge ribs, it is difficult for the mud cake to separate from the filter cloth. Separation, the mud cake is difficult to fall freely after the filter press is completed, and manual cleaning is required, which is time-consuming and labor-intensive; the third is that the filter cloth is woven from velvet in both warp and weft directions. The pulling force of the filter cloth is very large, while the pressure in the other direction is very small, so the silk fabric is stretched unevenly, which affects the service life of the filter cloth

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