High pressure double-layer filtering device for steel rolling sludge treatment

Abstract

The invention discloses a high pressure double-layer filtering device for steel rolling sludge treatment. By disposing a plurality of demountable meshes in flexible connection with baffle plates between driving rollers on the upper surface of a filtering mechanism, and equipping the meshes with a small aperture, on the one hand, a strong supporting effect can be achieved on a filtering belt, the feeding amount per unit time is increased by over 10%, and on the other hand, an effective two-stage filtration effect can be realized on to-be-treated sludge so as to enhance the filtration effect, and clogging of a filtrate collecting device can be effectively avoided. At the same time, by adding a magnetic material capable of performing adsorption at flexible joints of the meshes and the baffle plates, the connection fastness of the meshes and the baffle plates is enhanced, and separation of the meshes from the baffle plates can be effectively avoided when the feeding amount on the filtering belt is great. In addition, by setting the filtrate collecting device as an inverted conical structure, adsorption of filtrate in the filtrate collecting device can be effectively reduced.

Description

technical field [0001] The invention relates to the field of steel rolling wastewater treatment, in particular to a high-pressure double-layer filter device for treating steel rolling sludge. Background technique [0002] Due to direct contact with the equipment, the circulating water of the steel rolling direct cooling system has a high content of suspended matter and oil in the water. At the same time, in the steel rolling process, a large amount of iron oxide washed down by the high-pressure water gun also enters the steel rolling direct cooling circulating cooling water system with water. Therefore, the steel rolling direct cooling circulating cooling water system is usually equipped with scale recovery and sludge treatment systems, generally including rolling mill swirl wells, chemical degreasers, mud pools and filter press systems. [0003] At present, in the traditional process of circulating water in the steel rolling direct cooling system, the bottom sludge of the c...

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Problems solved by technology

In this process, the plate and frame filter press for processing the bottom sludge of the chemical degreaser has defects such as large equipment investment, large volume, complex mechanism, and intermittent operation due to structural reasons, resulting in low working efficiency and poor filtering effect.

Although the existing belt filter can realize continuous operation, it generally has defects such as easy blockage of the filter screen, high liquid content in the retentate, and unsatisfactory solid-liquid separation effect. In addition, because the filter working surface of the belt filter has A certain length, when

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