High-pressure filtering device used for steel rolling sludge treatment

Abstract

The invention discloses a high-pressure filtering device used for steel rolling sludge treatment. The high-pressure filtering device comprises a sealed pressurizing chamber and a filtering compartment, the sealed pressurizing chamber is an enclosed hollow tank, a gas inlet pipe and a feeding pipe are arranged on the outer wall of the sealed pressurizing chamber, the filtering compartment is arranged inside the sealed pressurizing chamber and comprises driving wheels, transmission rollers and a filtering strip, the driving wheels are arranged at two ends of the filtering compartment, the transmission rollers are arranged between the driving wheels, the filtering strip winds the peripheries of the driving wheels and the transmission rollers to form a filtering transmission mechanism, the filtering compartment and the sealed pressurizing chamber are divided into two independent enclosed spaces by the filtering strip, a filtrate outlet pipe is arranged on the side face of the filtering compartment, and the filtering compartment comprises a scraping plate which is a V-shaped plate and is used for scraping intercepting objects on the filtering strip.

Description

technical field [0001] The invention relates to the field of steel rolling wastewater treatment, in particular to a high-pressure 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 chemical degre...

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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 the amount of material added to the filter belt is large, it is easy to cause damage to the filter belt. On the one hand, it limits the amount of material added to the filter, affecting work efficiency. On the other hand, it accelerates the wear of the filter belt and affects the service life of the belt filter.

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