What is the purpose of the air filter?
The air filter is mainly used to purify the intake air and remove the dust particles. In addition, the exhaust gas of some production processes contains small pollutants (such as radioactive substances, oil mist, etc.) although this type of purification belongs to exhaust gas purification, due to its high purification requirements, an air filter is also required.
The characteristics of air intake purification are low dust concentration and fine dust particles in the treated air, and the required purification efficiency is high.
According to the different purification efficiency, the classification and performance of air filters are shown in the table.
Note: ① General filter adopts atmospheric dust counting method, and high-efficiency filter adopts DOP method. It can also be divided according to the specific use, characteristics and structure of the air filter, such as:
(1) Primary air filter
Uses: filter section in general ventilation air treatment equipment or primary filtration of fresh air system.
Features: The filter material can be replaced by itself, and the initial effect of the paper frame is one-time.
(2) Folding medium efficiency air filter
Application: Filtration of ventilation system. General air purification in the fields of electronics, pharmaceuticals, mechanical instruments, metallurgy, petroleum, chemical industry, light industry, food, etc. Medium Efficiency High Temperature Air Filter is manufacturer
Features: high efficiency, large dust holding capacity, small footprint.
(3) Bag type medium efficiency air filter
Application: Central air-conditioning centralized ventilation system, or as a pre-filter of high-efficiency filter, it can reduce the burden of high-efficiency filter, prolong its service life, and can also be used for general air purification in industrial fields.
Features: small resistance, large dust holding capacity.
(4) Activated carbon filter
Uses: Effectively remove odors, volatile agents, bacteria, viruses and various air pollutants, such as paint spray, smoke, common pollutants in electronic factories and museums, as well as odors in food processing plants and hospitals.
Features: Highly developed microporous structure, high adsorption capacity, fast adsorption and desorption speed, and good purification effect. The use of activated carbon filtration must have a pre-filter, otherwise, the efficiency of activated carbon will be reduced due to other pollutants in the air.
(5) Nylon mesh air filter
Uses: Ventilation and air conditioning systems with low air quality requirements, or places with harsh surrounding environments and high dust are used as primary pre-filters.
Features: small resistance, easy to clean and easy to maintain.
(6) Sub-high efficiency air filter
Uses: Various types of clean engineering and the final filtration of central air-conditioning and process air supply systems with special requirements or clean room filtration.
Features: high filtration efficiency, low resistance and large dust holding capacity.
(7) HEPA filter
Application: Clean air conditioning system, high cleanliness environment.
Features: high efficiency and low resistance.
(8) High-efficiency filter with large air volume
Application: High-performance filter at the end of air-conditioning box.
Features: high filtration efficiency, large air volume and large dust holding capacity.
(9) Aluminum mesh air filter
Uses: Ventilation and air conditioning systems with low air quality requirements, or places with harsh surrounding environments, large dust and grease, are used as primary pre-filters.
Features: Durable and easy to clean.
(10) HEPA filter air outlet
Uses: Suitable for clean rooms with various cleanliness levels and various ceiling structures in non-laminar flow form.
Features: reliable performance, convenient installation and disassembly, and simple maintenance.
(11) HEPA filter unit with fan
Uses: Suitable for sterile operating rooms in hospitals and manufacturing fields such as electronics, biology, medicine, and food.
Features: Hanging under the floor, the cleaning effect can reach grade 10,000 or grade 100,000 or grade 100,000, saving machine room space, suitable for local purification, especially in the environment where the food industry often needs to wash the floor.
(12) Air shower room
Uses and features: The air shower is a personal purification device used by operators when they enter the clean room. It uses high-speed clean air to blow and shower to remove the dirt on the people who enter the room. Its nozzles are adjustable to effectively remove dust from people and prevent outside contamination from entering clean areas. It can also be used for showering of bulky goods.
(13) Transfer window
Uses and features: A device for transferring items in the clean area to reduce the number of door openings, which minimizes the pollution of the clean room. It is mainly used for the transfer of small items between clean areas of different levels and between clean areas and non-clean areas.
(14) Material shower transfer window
Uses: It is suitable for the use of high-speed clean air to blow off the surface contamination of the object before the object enters the clean area, or the transfer of high cleanliness requirements between the clean area and the non-clean area.
Features: The nozzle can be adjusted to directly aim at the object for blowing, effectively removing the object’s contamination and preventing external contamination from entering the clean area.
(15) Ultra-clean workbench
Uses and features: The ultra-clean workbench is a general-purpose local purification equipment. It can effectively eliminate the harmful effects of suspended particles and process dust in the air of the working area on products, and is widely used in medical, pharmaceutical, chemical experiments, electronics, precision instruments, food and cosmetic fields.