What are the applications of air filters for everyday use? What are the common types of air filter consumables?

routineAir FilterWhat are the applications?Air FilterWhat are the common types of consumables?

With the increasingly serious environmental pollution and the strengthening of people's environmental awareness, air quality has become a focus of attention all over the world. It is now recognized that air filtration systems should not only protect mechanical equipment, but also protect people. Therefore, the application of air filters is becoming more and more widespread.

The largest application for air filters is residential buildings, followed by commercial and industrial buildings. In addition, filtration equipment is commonly used in clean rooms, copying equipment, indoor air purifiers, anesthesia gas filtration equipment, laser surgery applications, HVAC systems (heating, ventilation, and air conditioning systems), thermostats, computer printers, studio air filtration systems, air-conditioners, and more.

The rapid development of air filters is closely related to the development of the military and electronic industries. With the emergence of new test methods, the improvement of the use of evaluation and the improvement of the filtration performance requirements, the design of the filters themselves has made good progress, and one of the important things is the removal of the separator plate, i.e., the development of the partitionless filter. Separatorless filters not only control the danger of damage to the filter media by the separators, but also effectively increase the filtration area, improve the filtration efficiency, and reduce the airflow resistance, thereby reducing energy consumption. In addition, air filters have also made great progress in high temperature and corrosion resistance, as well as waterproofing and anti-bacteria to meet some special needs.

I. Application of air filters in the food industry

The food industry is becoming an expanding market for air filtration equipment. To maintain the fresh taste of food products, the use of sterilization to control contamination is falling out of use. This makes controlling product-related air pollution even more important. National regulations, insurance awareness and public concern are prompting meat processors, dairy producers and other food producers to upgrade their air filtration systems. In Europe, yogurt is canned under cleanroom conditions, with the result that the product can be kept longer without the addition of expensive chemical preservatives. Breweries have found that in order to protect their draft beer, they must control air pollution in the environment surrounding the filling plant. Filling in a clean room is the better option. This type of plant requires a Class 100,000 clean room, which can be top-ventilated and filtered with HEPA filters.

II. Application of air filters in office buildings

The driving force behind the demand for improved office air quality is the use of advanced office equipment. Computer terminals are a source of ozone and volatile organic compounds. Inkjet printers are sources of hydrocarbons and ozone. Dry photocopying machines produce hydrocarbons, respirable suspended particles and ozone; facsimile machines produce ozone and volatile organic compounds; and laser printers produce hydrocarbons, ozone and respirable particles. These products have seriously polluted the indoor environment and caused some harm to people and office equipment. It is estimated that there are 30% indoor air pollution problems in office buildings and public buildings in the United States, especially public buildings such as airports, stations, etc. The challenges faced by far greater than office buildings. The air flow in the concourse of Chicago's D'Hare Airport is about 51.66 million m3 per minute, and to improve air quality, the location is equipped with 1,100 prefilters, 1,100 final filters, and 2,200 charcoal filters (the charcoal in which needs to be replaced every 10-12 months). Demand for air filters in offices, commercial and public buildings is expected to reach $500 million globally in 2020.

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What are a few of the common more adsorptive air filter supplies?

Adsorption is a common phenomenon on the surface of the object, the surface of the object between the molecules of the gravitational force or chemical reaction will be gaseous matter, particles, etc. attached and kept on the surface of the object of a phenomenon, such as the curtains have not been moved for a long time, and the surface will be attached to a large amount of dust, etc. is a relatively common phenomenon in daily life. Filter adsorption air purifier principle can be divided into physical filter adsorption and chemical filter adsorption. Physical filter adsorption is adsorption carrier and particulate pollutants to intermolecular forces or van der Waals force-based adsorption, chemical adsorption is adsorption carrier and gaseous pollutants to intermolecular chemical bond-based adsorption. Most of the adsorption carriers are porous objects with dense specific surfaces. Activated carbon, silica gel, nano-mineral crystals, etc. are commonly used adsorption carriers, which are more commonly used in air purifiers, such as honeycomb activated carbon filters and coconut shell activated carbon filters.

Physical interception air purifier is mainly based on HEPA high density to vacuum, sterilization, HEPA high efficiency filter is folded through the filter paper to increase the filtration area, pore density, and thus improve the harmful particles of pollutants, particle size of microorganisms, the removal of the net rate.HEPA filter is an irregular fibers (air purifiers commonly used in the H13/H14 grade glass fiber filter paper) composed of particles of the interception carrier. HEPA filters are made of irregular fibers (H13/H14 grade glass fiber filter paper commonly used in air purifiers) that form the interception carrier of particles, which belongs to physical adsorption. In order to improve the purification effect of air purifier, some filters add electrostatic adsorption function on the basis of HEPA filter, which adsorbs the particulate pollutants firmly on the filter through electrostatic force.

In addition, activated carbon is also one of the common materials applied to air purifier filters, mainly relying on the adsorptive properties of the pores of the activated carbon to work on particulate pollutants, gaseous pollutants, odors and so on. Common air purifier activated carbon filter is coconut shell activated carbon filter, its adsorption is strong, but at the same time, it is also very easy to reach saturation, once reached, the adsorption will decline, the stability is also called poor, easy to re-release pollutants, therefore, the need for regular and timely maintenance or replacement of activated carbon filter to ensure that the adsorption and purification function of the activated carbon filter.