Disc Filters :One of The Simplest Yet Effective Filters and Have Been in Use for Decades

Disc filters are one of the simplest yet effective filters and have been in use for several decades now. These filters comprise a membrane that has been stretched over a disc-shaped frame. The membrane or micro screen is what helps carry out the actual filtration process. They are commonly used for separating solids or particulate matter from liquids. Some of the common application areas of these filters are in dewatering and metal treatment and finishing applications in the chemical and metalworking industry. Several metal ores and concentrates are de-watered using this method. The filtration surface area of these filters is fairly large. Several disc filters are usually placed in a parallel series during the filtration process. A disc filter can be used for several medium to heavy duty applications such as: Metal finishing and treatment applications: There are a number of processes right from electroplating solutions to powder carbon treatment to waste effluent polishing that are carried out using disc filters. Such filters are also extensively used for metal treatment. Metal treatment industry: A number of heavy duty applications such as dewatering of iron ore, taconite, coal, aluminium hydrate, and other beneficiation processes witness the use of a disc filter. These filters are available in several sizes. They could range from a few inches to a couple of feet depending on the volume of material to be filtered. However, the typical diameter of these filters ranges from 5" to 33". Most filter media manufacturers also offer custom sizes for specific requirements. Another vital consideration while purchasing a disc filter would be the material of the filtration media. There are a variety of options such as polypropylene filters, DE impregnated cellulose, carbon impregnated filters, PVDF, etc. These filters are classified using a unit of measurement called a 'micron'. A micron is unit of measurement in the metric system. The filter could either be nominal or absolute rated depending on its capacity to allow various sizes of particles to pass through. One of the most commonly used filters is the polypropylene filter. It is compatible for use with several different types of chemicals hence it is used with a broad variety of chemical filtration processes. A polypropylene filter can also be used with certain types of organic solvents. Organic solvents are used widely in the commercial industry, as they have the ability to dissolve rubber, plastics, oils, and fats. Another widely seen application of a disc filter is in wastewater treatment applications. Several rainwater harvesting systems also widely rely on these filters to recycle rain water that can then be used for irrigation, gardening or as gray water for toilets. These filters continue to see a steady demand from a myriad of industries as they are effective, compact and economical. Source: GOARTICLES