The filtration level of a filter element refers to its ability to intercept and remove pollutants of different sizes and properties step by step during the filtration process. The design of the filtering hierarchy directly affects the filtering effect, service life, and applicable scenarios of the filter element. According to different filtration principles and filtration accuracies, the filtration levels of filter cartridges can usually be divided into the following categories:

1. Coarse filtration level

The coarse filtration level is the defense line of the filtration system, mainly used to intercept larger particles and suspended solids. Its filtering accuracy is usually between tens of micrometers and hundreds of micrometers, mainly filtering out visible impurities such as sediment, rust, hair, fibers, etc.

characteristic:

-Low filtering accuracy: able to intercept larger particles, but limited filtering effect on small particles.

-High flux: Due to the large filter aperture, the resistance of water or air flow passing through is relatively small, making it suitable as a pretreatment step.

-Extend the lifespan of subsequent filter cartridges: By intercepting large particles, the burden on subsequent fine filter cartridges can be reduced, extending their service life.

Application scenarios:

The coarse filtration layer is commonly used in the pretreatment stage of household water purifiers, air purifiers, industrial filtration systems, and other equipment. For example, in a water treatment system, the coarse filter layer can intercept sediment and suspended solids in the water, protecting the subsequent fine filter element.

2. Microfiltration level

The filtration accuracy of the microfiltration level is between coarse filtration and ultrafiltration, typically ranging from 0.1 micrometers to 10 micrometers. It can intercept smaller particles such as bacteria, colloids, and some viruses.

characteristic:

-High filtration accuracy: It can effectively intercept small particles and improve water or air quality.

-Moderate flux: The filter aperture is small, but it can still maintain a high flux, suitable for daily use.

-Widely used: Microfiltration technology is mature, relatively low-cost, and suitable for various filtration scenarios.

Application scenarios:

Microfiltration levels are commonly used in household water purifiers, industrial water treatment, food and beverage processing, and other fields. For example, in water purifiers, microfiltration filters can remove bacteria and colloids from water, providing cleaner drinking water.

3. Ultrafiltration level

The filtration accuracy of the ultrafiltration layer is higher, usually between 0.01 microns and 0.1 microns. It can intercept smaller particles, including most bacteria, viruses, colloids, and large organic molecules.

characteristic:

-Efficient filtration: capable of removing the vast majority of bacteria and viruses from water, providing safer water quality.

-Retaining minerals: The pore size of ultrafiltration membranes is small, but they do not intercept minerals in water, making them suitable for drinking water treatment.

-Low energy consumption: The ultrafiltration process usually does not require additional energy input and can be completed through natural pressure filtration.

Application scenarios:

Ultrafiltration layers are widely used in household water purifiers, industrial water treatment, medical water and other fields. For example, in medical water, ultrafiltration technology can remove bacteria and viruses from the water, ensuring the safety of the water.

4. Nanofiltration level

The filtration accuracy of nanofiltration level is between ultrafiltration and reverse osmosis, usually between 0.001 microns and 0.01 microns. It can intercept smaller particles, including some viruses, large organic molecules, and some heavy metal ions.

characteristic:

-Selective filtration: Nanofiltration membranes can intercept some ions and organic matter, while allowing some minerals to pass through, making them suitable for softening and purifying water quality.

-Efficient removal of pollutants: capable of removing harmful substances such as heavy metals and pesticide residues from water.

-Energy saving and environmental protection: Compared with reverse osmosis, nanofiltration has lower energy consumption and is suitable for large-scale applications.

Application scenarios:

Nanofiltration layers are commonly used in industrial water treatment, drinking water purification, wastewater reuse, and other fields. For example, in drinking water purification, nanofiltration technology can remove heavy metals and organic matter from water while retaining beneficial minerals.

5. Anti infiltration hierarchy

The filtration accuracy of the reverse osmosis layer is high, usually between 0.0001 microns and 0.001 microns. It can intercept almost all particles, ions, organic matter, and microorganisms, providing almost pure water.

characteristic:

-Ultra high filtration accuracy: capable of removing almost all pollutants in water, including heavy metals, bacteria, viruses, organic matter, etc.

-Deionization: Reverse osmosis membranes can remove ions from water and are suitable for preparing high-purity water.

-High energy consumption: The reverse osmosis process requires high pressure and relatively high energy consumption.

Application scenarios:

Reverse osmosis layers are widely used in household water purifiers, industrial high-purity water preparation, seawater desalination, and other fields. For example, in seawater desalination, reverse osmosis technology can convert seawater into drinkable fresh water.

6. Adsorption level of activated carbon

The adsorption level of activated carbon does not belong to the traditional filtering level, but it removes pollutants such as organic matter, odors, chlorine gas, etc. from water or air through adsorption.

characteristic:

-Efficient adsorption: Activated carbon has a developed pore structure that can effectively adsorb organic matter and odors.

-Improving taste: In water purifiers, activated carbon can remove chlorine gas from water and improve its taste.

-Limited service life: The adsorption capacity of activated carbon will gradually decrease over time and needs to be replaced regularly.

Application scenarios:

Activated carbon adsorption layers are commonly used in household water purifiers, air purifiers, industrial waste gas treatment, and other fields. For example, in air purifiers, activated carbon can remove odors and harmful gases from the air.

7. Composite filter element

Composite filter element integrates multiple filtration levels into one filter element to achieve a more comprehensive filtration effect. For example, composite filter cartridges may include multiple levels such as coarse filtration, microfiltration, and activated carbon adsorption.

characteristic:

-Multi functionality: capable of intercepting multiple pollutants simultaneously, providing a more comprehensive filtering effect.

-Space saving: Integrating multiple filtering levels into one filter cartridge to save equipment space.

-Efficient and convenient: Users only need to replace one filter element to achieve multiple filtering functions.

Application scenarios:

Composite filter cartridges are widely used in household water purifiers, air purifiers, industrial filtration systems, and other fields. For example, in household water purifiers, composite filters can simultaneously intercept particulate matter, adsorb organic matter, remove odors, and provide high-quality drinking water.

summarize

The filtration level of the filter element ranges from coarse filtration to reverse osmosis, covering the interception range from large particles to small pollutants. Different filtering levels are suitable for different scenarios and needs, and users can choose the appropriate filter element according to their actual situation. In practical applications, multiple filtering levels are usually combined to achieve more comprehensive and efficient filtering effects. By designing and selecting filter elements reasonably, water or air quality can be effectively improved, meeting the diverse needs of life and industry.