What are the classifications of air filters for Guangdong purification projects
1. Disposable paper frame filter
The outer frame of a disposable paper frame filter is generally divided into a regular hard paper frame and a high-strength cut hard cardboard. The filter element is a pleated fiber filter material lined with a single-sided metal wire mesh. Beautiful appearance. The structure is sturdy and durable. The general cardboard frame is used to manufacture non-standard filters and can be used for the production of filters of any size. It has high strength and is not prone to deformation. High strength tactile and hard cardboard is used to manufacture filters with high specification accuracy and low aesthetic cost. If entrance fiber or synthetic fiber filter materials are used, their various functional indicators can reach or exceed those of the same production for entrance filtration.
The filter material is folded and packed into high-strength cardboard, increasing the windward area. The dust particles in the incoming air are effectively blocked between the folds by the filtering material. Clean air flows out evenly from the other side, so the air flow is smooth and the filter is gentle and even. Depending on the filter material, the particle size it blocks varies from 0.5 μ m to 5 μ m, and the filtration efficiency also varies.
2. Cleanable air filter
Traditionally, cleaning is done by rinsing with water or rubbing with hands. The outer frame is made of metal or plastic, and the filter material of the washable plate filter should be compacted with coarse fibers (diameter ≥ f10) and water-resistant. This type of filter material is mostly low-cost non-woven fiber felt, which is an ideal material for manufacturing G2-G4 efficiency filters. The filter can also be cleaned using ultrasonic waves.
3. Bag filter
It is essential for general ventilation air conditioning systems and is the main force in filtering air. The main purpose of making bags is to meet the requirements of high air volume and low resistance. The accurate method of using a bag filter is to install a pre filtration device at the front end of the bag filter, usually using disposable paper frame or metal frame plate primary filters. This can effectively prevent the bag filter from directly contacting harsh environments.
4. Medium efficiency and sub high efficiency box filters
Medium efficiency and sub high efficiency box filters use composite synthetic fibers and glass fiber filter media, equipped with internal metal brackets and high-strength galvanized sheet outer frames. It has the advantages of sturdy structure, low resistance, high air volume, long service life, and can replace the filter element to reduce the cost of use. It is being recognized by more and more industry users.
5. Non partition high-efficiency filter with partition high-efficiency filter
The application scope of high-efficiency filters is mainly in the end filtration of pharmaceutical, civilian or industrial clean places with high cleanliness requirements in industries such as electronics, semiconductors, precision machinery, pharmaceuticals, hospitals, and food. Because high-efficiency filters are generally used as the filtering end, the requirements for high-efficiency filters are also the most stringent. In some cases, the use of high-efficiency filters is not based on resistance considerations, but on other factors. If there is hydrofluoric acid in the factory and the workshop air conditioning is not a brand new air system, the glass fiber filter paper of the high-efficiency filter will be corroded by the return air. For safety reasons, it is necessary to replace the high-efficiency filter on schedule.
6. High temperature resistant and efficient filter
It still has a partition structure, using high-temperature resistant fiberglass or ultra-fine fiberglass filter paper, aluminum foil partition, stainless steel frame, and specially designed high-temperature resistant sealant for sealing and assembly. Each unit has undergone strict testing. The efficiency can reach F9-H14. Mainly used for ultra clean ovens or high-temperature air purification equipment and systems that require drying in production processes such as food and pharmaceuticals. The maximum working temperature is 350 degrees.
7. Activated carbon filter
Activated carbon is an excellent adsorbent with dual properties of physical and chemical adsorption. It can selectively adsorb various substances in the air to achieve disinfection and deodorization purposes. Activated carbon needs to be replaced after adsorption saturation, approximately every three months.
Activated carbon filter is made by attaching high-quality powdered activated carbon as an adsorbent material onto a polymer matrix, which has good adsorption and dust collection effects. It has low airflow resistance and can be used alone to remove fine dust, smoke, odors, and volatile organic pollutants such as benzene and formaldehyde; It can also be combined with ultra-fine melt blown fibers and coarse filter cotton to achieve higher dust filtration and deodorization effects. Mainly used for oil fume purification; Various household and car air conditioners, air filters matching; Water purification, gas-phase adsorption, etc.
The article originates from Guangdong Purification Engineering: http://www.xwsk.com.cn/
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