What is a Press Filter?
Filter press is a device that is used in the process of purification and separation of solids and liquids. The separation and purification process in this system is done by using the pressure exerted by the pump on the plates. Nab Bio company produces various pressure filters with different dimensions and capacities. Filter press is a widely used device in the wastewater treatment industry, which has different models according to various uses. This device is used in any type of slurry where excess water is seen and there is a need to reduce the humidity in them. These press filters often offer the highest amount of water removal due to their pressurized mechanism.
Filter press is an industrial device that, by applying hydraulic pressure (manual or electric), behind mesh and parallel plates made of polypropylene on which fabric is stretched, it is possible to separate solid particles and purify the suspension effluent from factories. It provides mines, industries, etc. This system provides the possibility of reuse of the water and the formed cake after the purification. Due to the use of pressure to separate suspended particles in the wastewater, they are also called pressure filters. In a simple way, it can be said that the filter press compresses the sludge in the form of a dry cake. This compression will be different depending on the density, compression pressure and specific characteristics of each sludge. There are three types of cake unloading: manual, chain, and automatic or robotic unloading. Usually, for large devices such as sizes 100, 120 and 150, due to the weight of the screen along with the cake and the difficulty of moving it by the operator, an automatic system or plc is used.
Also, filter press devices are made in two categories, chamber and membrane, in terms of cake dewatering rate. Chamber pressure filters are polypropylene plates that perform water extraction in one step. In membrane plates, in addition to dewatering, there are two flexible bags on both sides of each formed cake, which apply double pressure to the cake with water or air pressure from both sides of the cake and cause more dewatering to be done (drier cake). Due to the high price difference, the membrane filter press is usually used when drier solid materials are needed, or when the soluble or liquid phase has a high rial value.
Pressure filters are used in many different industries. From food production industries to plating and heavy metals industries. Below are the main industries in which the filter press is used:
For purification and cleaning and filtration in various industrial products
Textile and dyeing industries
Sugar and sugar industry
Tile industries and Ceramic
plating and production of heavy metals
food and beverage products.
in the pharmaceutical industry to have controlled and accurate processes and clean environments. Sludge is from water. Also, in the refining and petrochemical industry, filters with high volume and high pressure and automatic mechanism will be needed to produce quality materials. All kinds of mining industries and ceramic production also need modern huge filters to properly base the separation processes. Other uses of these filters include electroplating, metallurgy and marble factories in order to separate water from mud to reuse water during the marble cutting process.