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Analysis on Filtration Performance of Air Compressor Dust Filter

The function of the air compressor dust removal filter element is to enter the oil-containing compressed air generated by the main engine into the cooler, and enter the oil and gas filter element for filtration through mechanical separation, intercept and aggregate the oil mist in the gas, and form oil droplets concentrated at the bottom of the filter element and returned through the oil return pipe To the compressor lubrication system, the compressor discharges purer, high-quality compressed air; simply put, it is a device that removes solid dust, oil and gas particles and liquid substances in the compressed air.

The filtration performance of the dust filter is mainly reflected in the filtration efficiency, dust holding capacity, air permeability and resistance, and service life. The following is a brief analysis of the performance of the dust filter from these aspects:

    Filtration efficiency

    On the one hand, the filtration efficiency of the dust filter is related to the structure of the filter material, and on the other hand, it also depends on the dust layer formed on the filter material. From the perspective of the filter material structure, the filtration efficiency of short fibers is higher than that of long fibers, and the filtration efficiency of felt filter materials is higher than that of fabrics. High filter material. From the point of view of the formation of the dust layer, for the thin filter material, after cleaning, the dust layer is destroyed and the efficiency is greatly reduced, while for the thick filter material, a part of the dust can be retained in the filter material after cleaning, so as to avoid excessive cleaning. Generally speaking, the highest efficiency can be achieved when the filter material is not ruptured. Therefore, as long as the design parameters are properly selected, the dust removal effect of the filter element should be no problem.

    Dust holding capacity

    Dust holding capacity, also known as dust load, refers to the amount of dust accumulated on the filter material per unit area when the given resistance value is reached (kg/m2). The dust holding capacity of the filter element affects the resistance of the filter material and the cleaning cycle. In order to avoid a lot of dust removal and prolong the life of the filter element, it is generally required that the filter element has the largest dust holding capacity. The dust holding capacity is related to the porosity and air permeability of the filter material, and the felt filter material has a larger dust holding capacity than the fabric filter material.

    Air permeability and resistance

    Breathable filtration refers to the amount of gas passing through a unit area of ​​filter material under a certain pressure difference. The resistance of the filter element is directly related to the air permeability. As the constant pressure difference value to calibrate the air permeability, the value varies from country to country. Japan and the United States take 127Pa, Sweden takes 100Pa, and Germany takes 200Pa. Therefore, the pressure difference taken in the experiment should be considered when selecting the air permeability. The air permeability depends on the fiber fineness, the type of fiber pile and the weaving method. According to Swedish data, the air permeability of filament fiber filter material is 200–800 cubic meters/(square meter ˙h), and the air permeability of staple fiber travel material is 300-1000 cubic meters/(square meter ˙h), The air permeability of the felt filter material is 400-800 cubic meters/(square meter ˙h). The higher the air permeability, the larger the allowable air volume (specific load) per unit area.

    Air permeability generally refers to the air permeability of the clean filter material. When dust accumulates on the filter cloth, the air permeability will decrease. Depending on the nature of the dust, the general air permeability is only 20%-40% of the initial air permeability (the air permeability when the filter material is clean), and for fine dust, it is even only 10%-20%. The ventilation string is reduced, the dust removal efficiency is improved, but the resistance is greatly increased.

    Air compressor dust filter service life

    The life of the filter element refers to the time it takes for the filter element to explode under normal use conditions. The length of the filter element life depends on the quality of the filter element itself (material, weaving method, post-processing technology, etc.) two factors. Under the same conditions, a good dust removal process design can also prolong the service life of the filter element.

    1. The end cover plate and the inner and outer protective net are made of high-quality electrochemical plate material, which has good anti-rust and anti-corrosion performance, and also has the characteristics of beautiful appearance and good strength.

    2. The closed-cell rubber sealing ring (diamond or cone) with good elasticity, high strength and anti-aging is used to ensure the air tightness of the filter cartridge.

Imported high-quality and high-efficiency adhesive is selected, and the bonding part is firm and durable, and will not produce degumming and cracking, which ensures the service life of the filter cartridge and the safety of use in high-load continuous operation.

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