How does a filter press work?
2021-06-30 18:30:32
How does a filter press work?
A filter press is a batch-operated, fixed-volume machine that uses pressure filtration to separate liquids and solids. The solid-liquid mixture is pumped into the filter press and dewatered under pressure. It is used for a variety of water and wastewater treatment in a variety of different applications, from industrial to municipal.
The filter press for sale is mainly composed of frame, filter plate and filter cloth. The frame is made of Q235B, welded by carbon dioxide gas protection welding, open structure, the whole machine is treated with acrylic polyester anti-corrosion paint. The filter plate is made of food-grade polypropylene (pp), which is pressed at high pressure by 5000 tons press machine. The material of the filter plate is selected according to the nature of the material to be treated, and it is made by laser cutting and processing.
As the solid-liquid mixture is pumped through the automatic filter press, the solids begin to build up on the filter cloth and the filtrate simultaneously flows out through the filtrate channel. Solid-liquid separation is accomplished by building up a filter cake on the fabric. Initially, some fine particles may penetrate the filter cloth, but some of the larger solids begin to form a layer on the filter cloth similar to a pre-coating substance, and this layer adsorbs the particles, thus gradually forming a filter cake. As the feed pump continuously feeds the material into the filter press, the pressure inside the filter press increases, the moisture content of the filter cake gradually decreases, the filter cake is formed, then the solids are trapped in the filter press, the liquid is discharged, and the whole filtration process is finished.
As for the membrane filter press, after the filter cake is formed, the filter press can use liquid or air to make the membrane plate expand and make a second press on the filter cake to further reduce the moisture content of the filter cake. Therefore, membrane filter presses are often used for some viscous, difficult to filter materials and industries with high requirements for the moisture content of the filter cake.
If you have any questions about wastewater water filter press, please contact us freely: info@gaodetec.com. Whether you need performance optimization for an existing filter press, need spare press parts, or are embarking on a new filtration project, we can provide a suggestion for you.
