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The design of HILCO filters has also made significant progress, the most important of which is the removal of separators, i.e., the development of separator-free filters. Separator-free filters not only eliminate the risk of separators damaging the filter media, but also effectively increase the filtration area, improve filtration efficiency, and reduce airflow resistance, thereby reducing energy consumption. In addition, filters have also made great progress in high temperature resistance, corrosion resistance, water resistance, and bacteria resistance, meeting some special needs. The design of the filter itself has also made significant progress, the most important of which is the removal of separators, i.e., the development of separator-free filters. Separator-free filters not only eliminate the risk of separators damaging the filter media, but also effectively increase the filtration area, improve filtration efficiency, and reduce airflow resistance, thereby reducing energy consumption. In addition, filters have also made great progress in high temperature resistance, corrosion resistance, water resistance, and bacteria resistance, meeting some special needs.

HILCO filter applications

Air filters are used to obtain clean air that meets standards. General ventilation filters capture and adsorb dust particles of different sizes in the air to improve air quality. Chemical filters, in addition to adsorbing dust, can mainly adsorb odors and are usually used in biopharmaceuticals, hospitals, airport terminals, human living environments, and other places. The uses of general ventilation filters are relatively extensive, including the microelectronics industry, coating industry, food and beverage industry, etc. In other words, filters are just a means to achieve the goal of cleanliness.

HILCO filter selection

Select appropriate filters reasonably according to specific situations. The selection principles are as follows: Determine the efficiency of the final-stage filter based on the required cleanliness and purification standards indoors, and reasonably select the number of combination stages of air filters and the efficiency of each stage. If general purification is required indoors, primary efficiency filters can be used; if medium purification is required indoors, two-stage filters with primary and medium efficiency should be used; if ultra-clean purification is required indoors, three-stage purification filtration with primary, medium, and high efficiency should be used, and the efficiency of filters at all levels should be matched reasonably and properly. If the efficiency difference between two adjacent stages is too large, the previous stage filter will not protect the next stage filter. Analyze the properties of dusty gas. The properties of dusty gas related to filter selection are mainly temperature, humidity, and the amount of acids, alkalis, and organic solvents. Because some filters allow use at high temperatures, while others can only work at normal temperature and humidity, and the amount of acids, alkalis, and organic solvents in dusty gas affects the performance and efficiency of filters.

HILCO filter maintenance

To extend the service life of filters, the most fundamental method is to block dust at the pre-filter. Replacing pre-filters generally does not require production shutdown or debugging, so experienced owners will focus their attention and money on pre-filters and protective intermediate filters. In foreign projects and new domestic projects, F11 filters are the most common pre-filters for non-uniform flow cleanrooms. In some occasions, regulations on the service life of high-efficiency filters are not due to consideration of resistance, but other factors. If there is hydrofluoric acid in the plant, and the workshop air conditioning is not a fresh air system, the glass fiber filter paper in the filter will be corroded by the return air. For safety, high-efficiency filters must be replaced regularly. Some large pharmaceutical factories replace high-efficiency filters after the rainy season every year to prevent any possible mold contamination on the filters. Some biological laboratories and laboratories dealing with hazardous materials require the use of new high-efficiency filters for reliability before starting a new important project.

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