Whether it is to ensure healthy indoor air, get clean air and create a clean environment for production operations, or prevent leakage of harmful substances, choosing a suitable air filter is crucial for industrial air filtration systems.
Generally speaking, the end air filter determines the cleanliness of the air supply. Therefore, the end air filter is critical in the filtration process and should be protected with care.
When choosing a filter, the appropriate air filter should be selected reasonably according to the specific situation. In this regard, we can follow the following principles.
principle 1
Determine the efficiency of the air filter according to the standard of cleanliness required in the room.
If the indoor air quality requirements are general, you can choose the primary filter;
if the indoor conditions are moderate purification, you should use the primary and secondary two-stage filters;
if the indoor requirements are super clean purification, you can use the primary, secondary, and high-efficiency three-stage purification and filtration, and to reasonably match the efficiency of the filters at all levels, the efficiency of two adjacent filters should not be too different.
These all depend on the area of the production plant, the production facility and production line, and other factors.
Principle 2
Correctly measure the dust content of indoor and outdoor air and the characteristics of dust particles.
The filtration process is to filter the outdoor air and send it into the room, so the dust content of the outdoor air is the essential data.
Especially when dealing with multi-stage purification and filtration, when choosing pre-filters, you need to consider the use environment, operating energy consumption, and other factors before making a decision.
Principle 3
Correctly determines the filter’s characteristics.
General filter characteristics are filtration efficiency, resistance, transmission rate, dust capacity, filter air speed, processing air volume, etc.
When choosing a filter, choose a filter with high efficiency, low resistance, large dust capacity, moderate filtration air speed, large processing air volume, and ease to be installed, and consider the primary investment and secondary investment and energy efficiency ratio from the commercial point of view.
Principle 4
Analyze the nature of dust-containing gas.
This is important for industrial air filters. The specific characteristics of dust-containing gases affect the use of air filters.
The main properties of dust-containing gases related to air filters are temperature, humidity, acidity and alkalinity, and the number of organic solvents. This is because some filters are allowed to operate at high temperatures.
On the contrary, some filters can only work at room temperature and regular humidity. At the same time, the acidity of the dust-containing gas and the number of organic solvents can significantly affect the performance and efficiency of the air sensor.
In addition, there are factors of aerosol, smoke, and oil mist to consider. Therefore, before selecting a filter, an analysis of the gas should be studied before considering which filter to use.
Now let’s line up the situation and corresponding industrial air filtration needs and Commercial space.
1. Commercial building
The widespread use of advanced office facilities in Many commercial offices is driving the need for better air quality.
Computer terminals are a source of ozone and volatile organic compounds. Inkjet printers are a source of hydrocarbons.
Dry photocopiers produce hydrocarbons, respirable suspended particulates, and ozone; fax machines produce VOCs, and laser printers produce hydrocarbons and respirable particulates. Also, human-to-human contact can spread some bacteria and hair.
These contaminants have seriously polluted the indoor environment and have caused some harm to people.
To filter and purify this contaminated air, we have to choose activated carbon filters with good adsorption capacity, together with some medium and high-efficiency multi-stage filtration programs to screen and adsorb these harmful gases and small particles,
And if necessary, chemical treatment of the filters so that they can adsorb and decompose toxic substances to get clean air.
It is also an excellent way to open more windows, so fresh air can come in.
2. Manufacturing plants
Air quality requirements vary significantly from plant to plant. Plants with fume hoods and pollution control equipment require large amounts of supplemental air.
If the ambient air in the area where these plants are located is contaminated, the supplemental air must be filtered before it can be distributed to the workplace.
The semiconductor manufacturing and pharmaceutical industries require high levels of air cleanliness. A typical work environment contains 500,000 particles per cubic foot of air, while the latest requirement for semiconductor manufacturing is one particle per cubic foot of air.
As a result, these industries also use the most HEPA filters of any industrial air filtration. In contrast, they also require relatively high-quality industrial air filters.
To protect the HEPA filter, pre-filtration and intermediate filtration need to be added to the front section of the filtration system, which increases the filtration capacity and extends the life of the HEPA filter in the industrial air filter.
An essential issue for plant emissions is toxicity compared to smoke, fumes, oil mist, welding fumes, and other pollutants generated during the production process.
Heavy metals such as mercury, arsenic, chromium, and beryllium are highly toxic, and their emission limits are stringent.
In the area of air toxicity, several countries have passed new and stricter legislation. The new regulations have lowered air toxicity limits from 20 m g/m 3 (standard) to 010004 m g/m 3 (standard). Plants need more advanced filters or filtration facilities to remove submicron particles to achieve this goal.
In some machining production processes, mist, smoke, and other contaminants can be used for dust collection with Filter cartridges. Sometimes these cartridges are mounted to the facility.
3. Hospitals
The health industry is a vast and particular industry with high requirements for air cleanliness. Typically, the minimum requirement for hospital air is filtered with a 30%-40% efficiency pre-filter and a 99.97% or more efficiency final filter.
Many hospital HVAC systems use 100% outdoor air, a good strategy for preventing cross-contamination of patients through suspended microorganisms in the HVAC system.
However, using 100% outdoor air does not eliminate the growth of microorganisms in the air filtration media and their adverse effects on the care environment.
Therefore, there is still a huge need for advanced HVAC systems in many hospitals.
Clean rooms in health systems were first used in operating rooms. At first, it was only widely used in orthopedic surgery because of the long duration of orthopedic surgery and its tendency to cause infections in contact with contaminants.
The ideal level of control is to use the air near the operating table to achieve a cleanliness level of 100 class.
Other areas where clean rooms are used are birthing rooms, nursery rooms, burn rooms, cardiac care units, etc.
One of the latest advances in using clean rooms for dental surgery reduces the risk of infection of medical personnel during lengthy surgical procedures by contacting bacteria.
4. Food Processes
Food processing is becoming an expanding market for air filtration facilities for the air filtration industry—more than other small businesses.
Sterilization to eliminate contamination and maintain the fresh taste of food products is being phased out of use. This has made it even more critical to eliminate product-related air contamination.
State regulations, insurance awareness, Commercial considerations, and customer concerns are driving meat processors, dairy producers, and other food manufacturers to upgrade their industrial air filtration systems to meet customers’ needs.
