How to clean LEFILTER pleated filter element

Pleated filter cartridge is a kind of element used for filtering, which has many characteristics and advantages and is widely used in industrial dust removal, air purification and other fields. The following is a detailed introduction to pleated filter cartridge:

Structural features:

Pleated design: There are many pleats on the surface of the pleated filter cartridge, which greatly increases the surface area of filtration. Compared with traditional flat filter cartridges or filter bags, pleated filter cartridges can provide a larger filtration area at the same volume, thereby improving filtration efficiency and processing capacity. For example, in some scenarios with limited space but high filtration requirements, the advantages of pleated filter cartridges are particularly obvious.

Various materials: It is made of rich materials, and common ones include polyester fiber, glass fiber, non-woven fabrics, etc. These materials have different characteristics, such as polyester fiber has good wear resistance and corrosion resistance; glass fiber has good high temperature resistance and is suitable for filtration in high temperature environments; non-woven fabrics have good filtration accuracy and air permeability. Different materials can be selected according to specific filtration requirements.

Internal support structure: A support skeleton is usually provided inside the pleated filter cartridge to support the pleated structure of the filter cartridge to prevent deformation or collapse due to pressure changes during the filtration process, and to ensure the stability and filtration effect of the filter cartridge.

Working principle:

Dust-containing gas or liquid enters the pleated filter cartridge under pressure, and the dust, particles and other impurities in it are intercepted and adsorbed by the filter material on the surface of the filter cartridge. Due to the large filtration area of the pleated filter cartridge, it can provide more filtration channels, making it easier to capture impurities.

The clean gas or liquid after filtration is discharged from the other end of the filter cartridge, achieving the purpose of filtration. As the filtration process continues, impurities on the surface of the filter cartridge will gradually accumulate. When they accumulate to a certain extent, it is necessary to clean or replace the filter cartridge to ensure the continuous and stable filtration effect.

Advantages:

High filtration efficiency: The large filtration area and reasonable pleated structure design enable the pleated filter cartridge to efficiently capture tiny particles and dust, with high filtration accuracy. It is very suitable for some occasions with strict filtration requirements, such as electronics, pharmaceuticals, food processing and other industries.

Low pressure loss: When gas or liquid passes through the pleated filter cartridge, due to its special structural design, the flow resistance of the fluid is relatively small and the pressure loss is low. This can not only reduce the energy consumption of the system, but also reduce the pressure requirements for other equipment in the filtration system and extend the service life of the equipment.

Long service life: high-quality materials and reasonable structural design make the pleated filter cartridge have good wear resistance, corrosion resistance and fatigue resistance, and a long service life. At the same time, some pleated filter cartridges are also washable and can be reused after cleaning, reducing the cost of use.

Easy to install and maintain: The installation method of the pleated filter cartridge is relatively simple, and it can usually be installed compatible with existing filtering equipment. In terms of maintenance, due to its relatively compact structure, it is easy to operate when replacing the filter cartridge, and no complex tools and equipment are required, which greatly shortens the maintenance time.

Application areas:

Industrial dust removal: In the steel, cement, chemical, electric power and other industrial fields, pleated filter cartridge dust collectors are widely used to treat dust and particulate matter in various industrial waste gases, effectively reducing the pollution of industrial production to the environment.

Air purification: Air purification systems used in commercial buildings, hospitals, schools, offices and other places remove pollutants such as dust, pollen, bacteria and other pollutants in the air to improve indoor air quality.

Liquid filtration: In liquid filtration in water treatment, petrochemical, pharmaceutical and other industries, pleated filter cartridges can filter out impurities, particles, suspended matter, etc. in the liquid to ensure the purity and quality of the liquid.

Common cleaning methods for LEFILTER pleated filter cartridges are mainly the following:

Pulse backwash cleaning:

Working principle: When the pulse controller sends a signal, the exhaust port of the pulse control valve is opened, the gas outside the back pressure chamber of the pulse valve releases the pressure, and a pressure difference is generated on both sides of the diaphragm. The diaphragm is displaced due to the pressure difference, causing the pulse valve to open. At this time, compressed air is ejected from the air bag through the pulse valve through the small hole of the injection pipe (the gas ejected from the injection pipe is the primary air). When the high-speed airflow passes through the Venturi inducer, it will induce surrounding air (called secondary air) several times the primary air into the filter cartridge, causing an instantaneous positive pressure in the filter cartridge. This positive pressure will cause the filter cartridge to expand and deform to produce vibration. Under the action of the reverse airflow, the dust attached to the outer surface of the filter cartridge is peeled off, thereby achieving cleaning.

Advantages: good cleaning effect, high efficiency, can completely remove dust on the filter cartridge; relatively small gas consumption; can realize timed automatic cleaning through the control system, easy to operate, and can ensure the continuous operation of the dust collector.

Disadvantages: need to be equipped with a compressed air system, which increases the complexity and cost of the equipment; if the pressure or flow of compressed air is unstable, it may affect the cleaning effect.

Mechanical vibration cleaning:

Working method: mechanical devices such as manual, electromagnetic vibration, pneumatic, etc. are used to vibrate the filter cartridge. The vibration frequency can be adjusted according to the working conditions and dust characteristics. For example, the eccentric wheel is driven by a motor to rotate to generate vibration, or electromagnetic force is used to generate periodic vibration. During the vibration process, the dust on the filter cartridge will loosen due to vibration, detach from the surface of the filter cartridge, and fall into the ash hopper under the action of gravity.

Advantages: relatively simple structure, no additional compressed air source is required, and the equipment cost is low; for some dusts with less viscosity, the cleaning effect is better.

Disadvantages: Vibration cleaning may cause some wear and tear on the structure of the filter cartridge, affecting the service life of the filter cartridge; the vibration generates a lot of noise and the working environment is poor; the cleaning effect may not be as thorough as pulse back-blowing cleaning, and the ability to remove fine dust particles is limited.

Back-blowing and vibration combined cleaning:

Working process: This cleaning method combines the two cleaning methods of back-blowing and vibration. First, the filter cartridge is back-blown using reverse airflow (usually provided by a fan) so that the dust in the filter cartridge is loosened by the reverse impact force. Then, the filter cartridge is vibrated by a mechanical vibration device to further promote dust shedding. For example, in some filter cartridge dust collectors, the back-blowing blower is first started for back-blowing, and then the vibration device is started for vibration cleaning.

Advantages: It combines the advantages of back-blowing cleaning and vibration cleaning, can improve the cleaning effect, and has a better removal ability for dust with strong adhesion; the parameters of back-blowing and vibration can be flexibly adjusted according to actual conditions to achieve the best cleaning effect.

Disadvantages: The equipment structure is relatively complex, and it needs to be equipped with a back-blowing system and a vibration device at the same time, which increases the difficulty and cost of equipment maintenance; during operation, the coordinated work of back-blowing and vibration requires precise control, otherwise it may affect the dust cleaning effect.

High-pressure airflow back-blowing cleaning:

Working principle: Directly use high-pressure airflow to back-blow the filter cartridge, and the high-pressure airflow blows from the inside or outside of the filter cartridge to the surface of the filter cartridge to blow off the dust attached to the filter cartridge. High-pressure airflow can be provided by a high-pressure fan or a compressed air system.

Advantages: The airflow is uniform and can fully clean the filter cartridge; for some large filter cartridge dust collectors, high-pressure airflow back-blowing can ensure the cleaning effect.

Disadvantages: Large gas consumption and high operating costs; high pressure is required to achieve a good cleaning effect, and high requirements are placed on the sealing and pressure resistance of the equipment.