What is industrial filtration?
It involves physical, biological and chemical operations that separates the solid substances and fluid from a mixture that is filled with a filter medium having complex structure through which the fluid passes. Industrial filtration involves the process of removing solid matter from liquids and gases. It simply acts like a strainer and used for purifying.
Filtration in industries are done through a suspension process where a porous medium is present and liquids and gases are separated from it. There are three main types of industrial filtration that is recognized by pressure technology and modalities such as microfiltration, ultrafiltration, nanofiltration and reverse osmosis. The industrial filtration market includes filter press, bag filters, drum & depth filters and cartridges filters.
Applications of industrial filtration include protection of the equipment, purification, safety, product isolation and efficiency.
Filtration involves certain deals and requirements. They are-
- Suspended solid load present in the application.
- Viscosity of fluid.
- Density or specific gravity of fluid.
- Chemical compatibility.
- Operating parameters using operating pressure and temperature.
- Rating of the filtration required.
The process of industrial filtration, involves certain principles and types of filtration.
- Centrifugal filtration– it involves the principle of rotational movement through the filter body. The rotational movement have a defined speed of equipment and the high-density solids or liquids are separated from the fluid of low density.
- Gravity filtration– gravity filtration is performed with atmospheric pressure when the suspended solids are removed from the liquids using a flow direction from the top surface to the lower surface.
- Vacuum filtration– it is used to remove the suspended dust particles from the atmospheric air through a static pressure level.
- Chill or cold filtration– this process is done after maintaining a lower temperature and is useful in removing fatty acids, proteins or esters which avoids sedimentation in the final use of the filtrate at a lower temperature.
- Hot filtration– it is useful in removing the amount of impurities from crystalline compounds. At a high temperature, the crystalline compounds are dissolved in a suitable solvent and remove all the impurities from the liquid compound.
- Multi layered filtration-filtration is done using a filter tank where multiple gravels are arranged by various types and sizes settled in different spaces.
- Mechanical filtration– this filtration is a form of modern innovation that is useful to cater the industrial filtration when operated at higher atmospheric pressure.
Industries are using advanced filtration techniques that include advancement in the sintered metal filters and various types of filter media are used in the industries. Some industries are also using bag and belt techniques for cleaning and filtration. Thus, these advancements include the development of continuous process to replace the old techniques.