The following is a detailed introduction about industrial filters:

Definition and Function

Definition: An industrial filter is a device used to filter and purify various fluid media (such as liquids and gases) in industrial production processes. It removes impurities, particles, pollutants, etc. from the media through physical, chemical, or other means to meet the purity requirements of the production process.

role

Protection equipment: prevent impurities from entering pumps, compressors, heat exchangers and other equipment, reduce equipment wear, blockage and failure, and extend equipment service life.

Improve product quality: In industries such as food, pharmaceuticals, and electronics, ensure that raw materials, intermediates, and finished products in the production process are not contaminated, and guarantee the purity and quality of products.

Optimizing the production process: Removing impurities from the fluid can improve its fluidity and heat transfer efficiency, making the production process more stable and efficient.

Environmental protection: Filter and treat industrial wastewater and exhaust gas to reduce pollutant emissions and minimize environmental pollution.

Working principle

Mechanical filtration: By using filter elements such as filter screens, filter bags, and filter cartridges, particles and impurities in the fluid are intercepted, allowing the fluid to pass through the filter elements and the impurities to be retained.

Adsorption filtration: using the adsorption effect of activated carbon, molecular sieve and other adsorption materials to remove organic pollutants, odors, heavy metal ions, etc. from fluids.

Centrifugal filtration: By the action of centrifugal force, particles and impurities in the fluid are separated under the action of centrifugal force, commonly used to separate impurities from larger particles.

Electrostatic filtration: Utilizing the action of an electrostatic field to adsorb charged particles in a fluid onto an electrode, thereby achieving the purpose of filtration. It is commonly used in air filtration.

Structural composition

Shell: usually made of metal or plastic, used to accommodate filter elements and other components, forming a closed filtration space that can withstand the pressure during the filtration process.

Filter elements, such as filter screens, filter bags, filter cartridges, etc., are the core components that achieve filtration functions. Different materials, accuracies, and structures of filter elements are selected according to different filtration requirements.

Backwash mechanism: used for regularly cleaning filter elements, removing trapped impurities, and restoring the filtering performance of filter elements. Common backwash methods include high-pressure water backwash, air backwash, etc.

Electric control box: used to control the operation of filters, including the start, stop, and time setting of backwashing, to achieve automated operation.

Electric valve: used to control the flow direction of fluid in and out and during backwashing process, ensuring the normal operation of filtration and backwashing process.

Type and Characteristics

air filter

Primary filter: mainly used to remove large particles in the air, such as dust, sand, etc., with a filtration accuracy generally above 5 microns. It has the characteristics of low resistance, large dust holding capacity, and low price.

Medium efficiency filter: capable of removing particles with a diameter of 1-5 microns, such as pollen, bacteria, etc., with high filtration efficiency, commonly used for intermediate filtration in air conditioning systems and general industrial cleanrooms.

Efficient filter: capable of removing particles with a diameter of 0.3 microns or more, such as smoke, bacteria, viruses, etc., with a filtration efficiency of over 99.97%. It is widely used in industries such as electronics, pharmaceuticals, and healthcare that require high air cleanliness.

Ultra efficient filter: It can remove particles with a diameter of 0.1 microns or more, such as radioactive substances, with extremely high filtration efficiency. It is used in situations where high air cleanliness is required, such as sterile workshops in semiconductor manufacturing and biopharmaceuticals.

liquid filter

Bag filter: Using a filter bag as the filtering medium, the liquid is introduced into a closed filter housing to achieve solid-liquid separation through the filter bag. It has the advantages of high filtration efficiency, easy operation, and low cost, and is suitable for liquid filtration in various industries.

Tube filter: composed of a cylinder, stainless steel filter or fiberglass filter, sewage part, transmission device, and electrical control part. When the medium passes through the filter, impurities are intercepted outside. When cleaning is needed, the detachable filter can be removed for cleaning.

Centrifugal filter: using centrifugal force to separate particles and impurities in the liquid, it has the advantages of large processing capacity and small footprint, and is commonly used for processing liquids containing a large amount of solid particles.

application area 

Chemical industry: used for filtering chemical raw materials and products, removing impurities, improving product quality, while protecting production equipment, preventing blockage and corrosion.

Pharmaceutical industry: During the drug production process, raw materials, intermediates, and finished products are filtered to ensure the purity and sterility of the drug, in compliance with Good Manufacturing Practice (GMP) requirements.

Food and beverage industry: used for filtering fruit juice, milk, beer, beverages, etc., removing impurities, bacteria, and suspended solids to ensure the hygiene, safety, and taste of food and beverages.

Electronics industry: In the process of semiconductor manufacturing, electronic component production, etc., high-precision filtration is carried out on ultrapure water, photoresist, etc. to prevent particle impurities from causing defects in electronic products, affecting product performance and quality.