Rotary disc filter

As a continuous and efficient vacuum filtration equipment, the structure design of the Rotary disc filter revolves around the core function of "solid-liquid separation". The device has a horizontally placed main turntable, on which several fan-shaped filter chambers are evenly installed along the circular direction. These filter chambers are the key units for achieving filtration.

The upper part of each fan-shaped filter chamber is sequentially equipped with filter plates, filter screens, and filter cloth. These three layers of components are stacked together, mainly responsible for intercepting solid particles and allowing liquids to pass smoothly; And the lower part of the filter chamber will be connected to an outlet pipe, which is in turn connected to the wrong air disc located at the center of the turntable. The core working power of the entire equipment comes from the vacuum system. Through the suction generated by the vacuum system, the liquid is driven to pass through the filter cloth, filter screen, and filter plate, and then discharged through the outlet pipe and cross disc, thus completing the solid-liquid separation process. 

Working Principle

The full name of the Rotary disc filter revolves around "continuous operation and continuous separation", and the entire process can be divided into three stages according to function: adsorption, dehydration, and unloading, forming a cycle of interlocking.

Firstly, in the adsorption process, after the equipment is started, the motor drives the filter disc to slowly rotate. At this time, the slurry to be processed in the filter chamber will enter a dedicated adsorption area. Under the action of the vacuum pump, a pressure difference will be formed on both sides of the filter medium. This pressure difference will act like a "suction force", allowing solid particles in the slurry to firmly adhere to the surface of the filter disc and slowly accumulate to form a filter cake. Meanwhile, the liquid in the slurry will pass through the filter cloth, follow the filtrate pipe to the distribution head, and finally be discharged from the distribution head to the equipment.

When the filter cake leaves the liquid surface with the rotation of the filter disk, it enters the dehydration stage. At this time, the vacuum pump still keeps working, and under the action of vacuum suction, the residual moisture in the filter cake will continue to be "pumped away", making the filter cake drier. When the filter cake rotates to the discharge area, the equipment will turn on the reverse air blower, which will blow air from the inside of the filter disc outward, blowing the dried filter cake off the filter disc. The filter cake then falls into the discharge groove below to complete the collection.

In this way, as the filter disk continues to rotate, the three stages of adsorption, dehydration, and unloading are repeatedly carried out, and the entire solid-liquid separation operation can be continuously cycled without stopping halfway.

Price of Rotary disc filter

There is no fixed price standard for Rotary disc filter, and there are significant differences between different equipment, mainly influenced by several key factors. Firstly, the filtering area. The larger the area that the equipment can filter simultaneously, the more the overall structure and material usage will increase, and the price will be relatively higher. Then there is the material of the equipment, for example, some require the use of corrosion-resistant special materials, which have a much lower cost compared to ordinary steel, and this will directly affect the price. There is also processing capacity, which refers to how much slurry can be processed per unit of time. Equipment with strong processing capacity requires higher internal components and power systems, and the price will also be higher.

In terms of price range, small vacuum turntable filters, such as those suitable for small workshops or small-scale production, can be purchased for around $10000. But if it is large, such as those used for continuous high-intensity operations in factories, with high performance requirements and high-quality and wear-resistant materials, the price will go up, possibly reaching around 100000 US dollars. If there is a special customization demand, the price may even be higher.

Application

Rotary disc filter are mainly used for liquid-solid separation and are widely used in many industrial fields. It is commonly used in the chemical industry for separating various solutions and solid impurities, in pharmaceutical processes for purifying materials and removing impurities, and in metallurgical and mineral processing industries for handling mixtures such as slurry.

However, it is particularly suitable for scenarios where high washing requirements are required and the slurry contains medium to coarse particles, making it very suitable for use. For example, when producing titanium dioxide, it is necessary to separate the titanium dioxide particles from the liquid and ensure that the particles are cleaned thoroughly; When extracting alumina, precise separation is also required for the slurry containing alumina particles; In the processing of precious metals such as gold and silver, separating metal particles and liquids in the material can also achieve good results.

Summary

In the production of chemical, metallurgical, pharmaceutical and other industries, solid-liquid separation is a key link, and rotary disk filter are becoming an important equipment for achieving green and efficient production in these industries due to their continuous operation and high separation efficiency.

In industrial applications, rotating disc filter not only solve the problem of solid-liquid separation for traditional industries such as chemical and mineral processing, helping enterprises improve raw material utilization and reduce wastewater emissions, but also play an important role in clean production and new energy material purification and processing in the pharmaceutical industry. They have become indispensable equipment for optimizing production processes and promoting environmental upgrades in multiple industries.