Vacuum belt dehydrator and its combined filter cloth scraper

Abstract

The invention discloses a vacuum belt dehydrator and a combined type filtering cloth scraper thereof. The combined type filtering cloth scraper comprises a roller scraper (1) and a flat-plate scraper (2), wherein the outer circumferential surface of the roller scraper is matched with a material bearing surface (5) of a return section (4) of filtering cloth (3) of the vacuum belt dehydrator so as to scrap off materials attached to the material bearing surface due to the rotation of the roller scraper; the flat-plate scraper is matched with the outer circumferential surface of the roller scraper so as to scrap off materials attached to the outer circumferential surface of the roller scraper through the flat-plate scraper. The combined type filtering cloth scraper disclosed by the invention can effectively separate the materials attached to the filtering cloth, and the problems of abrasion and clamping of the filtering cloth are effectively solved.

Description

technical field [0001] The invention relates to a combined filter cloth scraper, in particular to a combined filter cloth scraper of a vacuum belt dehydrator and the vacuum belt dehydrator. Background technique [0002] The vacuum belt dehydrator is a continuous filter that uses the negative pressure of the vacuum equipment and the gravity of the material to achieve rapid solid-liquid separation. It can be widely used in solid-liquid separation in metallurgy, chemical industry, papermaking, food and other fields, especially in limestone -The vacuum belt dehydrator is basically used in the gypsum wet desulfurization system. However, when the general vacuum belt dehydrator is working normally, with the rotation of the filter cloth, the dehydrated material will not be completely separated from the filter cloth due to its own adhesion force under the action of gravity, and some materials will adhere to the filter cloth. The surface is brought back with the rotation of the filte...

AI Technical Summary

Problems solved by technology

[0004] The flat filter cloth scraper is in angular contact with the filter cloth, so the distance between the scraper and the filter cloth is not easy to adjust. When the gap is small, it can effectively separate the materials adhered to the filter cloth. However, because the filter cloth joint is generally used The zipper type metal joint has different degrees of edges and corners and is thicker than the filter cloth body. Therefore, when the filter cloth joint is transferred to the scraper, there will be greater friction, which will block the filter cloth and cause damage to the filter cloth.

However, if the distance between the scraper and the filter cloth is too large, the materials adhering to the filter cloth cannot be separated well.

[0005] Due to the contact between the drum type scraper and the filter cloth which belongs to the arc surface, it can effectively prevent jamming, but during the operation, the material adheres to the drum and causes the local diameter of the drum to be inconsistent, which not only affects the separation effect, Moreover, there is a greater security risk

[0006] Therefore, the present invention needs to provide a scraper that can simultaneously solve the problem of filter cloth wear and jam caused by the adhesive material of the drum scraper and the flat scraper, which is a problem to be solved in the prior art

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