Filter Machine

The disc filter is a highly efficient and energy-saving solid-liquid separation device. With its unique structural design and excellent operational performance, it holds a significant position in the field of industrial production. Specifically engineered for filtering suspensions, its core advantages lie in production efficiency, operational stability, and ease of operation. It is particularly suitable for demanding working conditions, significantly reducing operation and maintenance costs and providing strong support for improving production quality and efficiency across industries. It has now become the preferred equipment for solid-liquid separation in alumina production and various other sectors.

The device employs a scientific working principle to achieve efficient solid-liquid separation. A vacuum pump creates negative pressure, generating a stable pressure differential on the surface of the filter disc. Under this pressure, solid particles from the suspension are retained on the filter cloth to form a filter cake, while the filtrate passes through the cloth and is discharged. The filter cake moves with the rotating disc into the drying zone, where most moisture is removed, before reaching the discharge zone. Here, compressed air from a blower dislodges the majority of the cake, and any remaining residue is completely removed by a scraper device, completing one efficient filtration cycle with excellent separation results.

Multiple core technological innovations give the device its leading performance. Its filtration structure features a large-diameter design with a lightweight top optimization, significantly increasing production capacity compared to similar domestic and international equipment and ranking among the largest disc diameter devices globally. The unique distributor head and central shaft structure not only reduces vacuum loss and increases filtration pressure differential but also adds vacuum channels to enhance vacuum intensity per unit area. This ensures fast filtrate flow, dense and uniform filter cakes with low moisture content. The single distributor head design also saves space and optimizes plant layout.

The device demonstrates significant advantages in operation, maintenance, and adaptability. It uses rolling bearings to replace traditional structures, reducing maintenance workload and the frequency of wearing parts replacement, effectively controlling operational costs. It is the first in China to allow on-the-fly adjustment of the filtration zone area, with submersion rates flexibly adjustable between 38% and 53%, adapting to diverse process needs. The absence of mechanical agitation, combined with variable frequency speed control technology, allows precise matching of different process requirements for technical indicators. The open overflow design of the tank enables rapid discharge and smooth overflow, completely preventing material blockage and buildup.

Detailed design further enhances the device's practicality and stability. The sector plates adopt a small central angle and large diameter design, reducing the number of discs while expanding the filtration and drying areas. Replacing perforated plates with specially processed filter plates strengthens rigidity and increases porosity and air permeability. The reduced weight of individual sector plates lowers manual labor intensity. The top of the vertical sector plates allows for single-piece filter cloth replacement, offering convenient operation, minimal spare parts requirements, and significantly improved operational stability.

The feeding and auxiliary system design balances practicality and safety. It utilizes mid-bottom simultaneous feeding or bottom-only feeding methods, effectively preventing material sedimentation and crystallization in the lower part of the disc. The rapid pneumatic butterfly valve discharge design allows quick material evacuation during equipment failure, preventing sedimentation. A centralized lubrication station with dry grease lubrication ensures reliable and uniform lubrication. The belt drive system provides more reliable mechanical protection, while the special pipeline connection design, featuring angled connections and silicone rubber interfaces, ensures smooth filtrate flow, greatly reduces vibration, and enhances operational stability.

The device has a wide range of applications. It is primarily used for filtering suspensions in the decomposition process of alumina plants and is also suitable for various solid-liquid separation scenarios involving suspensions in industries such as chemicals, mining, and environmental protection. With its comprehensive technical advantages and versatile adaptability, the disc filter can meet the stringent production requirements of different industries, providing a solid guarantee for enterprises to achieve efficient, stable, and low-cost production, and driving the upgrading and evolution of filtration processes across sectors.