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What factors will affect the service life of high-temperature efficiency filters?
What factors will affect the service life of high-temperature efficiency filters?The service life of high-temperature high-efficiency filters is affected by many factors, the following is a detailed analysis of the key factors:1. Use environment Temperature condition Long-term high temperature: Continued close to or beyond the design temperature limit (such as 250℃ filter long-term operation at 280℃), will accelerate the embrittlement of glass fiber filter material and glue failure, resulting in structural cracking or leakage. Temperature fluctuations: Frequent starting and stopping of equipment or sudden cooling will cause the material to expand and shrink, increasing the risk of stress damage to the filter material and the frame. Dust pollution degree High concentration of dust: such as cement, metal processing, and other industries, dust quickly clogs the filter hole, resulting in increased resistance, reduced filtration efficiency, and shortened replacement cycle. Dust properties: sharp particles (such as metal debris) may scratch the filter material, reducing the filtration accuracy; Oily dust is easy to adhere to the filter material and difficult to clean. Corrosive gas Acidic or alkaline gases in chemical and electroplating environments can corrode metal frames (such as galvanized frames) and sealants, resulting in structural failure or leakage. Two, maintenance Timely cleaning and replacement Surface area dust: failure to clean the dust on the surface of non-woven fabrics in time will lead to increased resistance, increased fan energy consumption, and even cause local filter material overload damage. Cartridge replacement: Extended use (such as resistance exceeding 1.5 times the initial value) will cause a significant decrease in filtration efficiency and affect the cleanliness of the system. Installation tightness The uncompacted sealing ring or border deformation during installation will lead to unfiltered air bypass, making the local filter material bear excessive load and accelerate aging. Operating specification Start/stop procedure: Slow heating or cooling not according to the regulations (such as direct high-temperature operation when curing is insufficient), will lead to glue cracking or filter material folding deformation. Airflow stability: Fan failure or unreasonable pipe design leads to uneven wind speed, which may cause local wear or tear of the filter material. Third, product quality Material property Filter material: high-quality ultrafine glass fiber filter paper (such as thickness ≥0.1mm) has better high-temperature resistance and folding resistance, and can withstand higher-strength air impact. Glue: ceramic glue (resistant to more than 350 ° C) is more resistant to high temperatures than silicone, but the cost is higher; Inferior glue is volatile or carbonized at high temperatures and loses its sealing. Manufacturing process The precision of the baffle structure of aluminum foil affects the spacing of the layers, and the uneven spacing will lead to excessive local resistance. Filter material indentation technology can enhance the damage resistance of filter paper. Iv. Other key factors Prefilter configuration In systems where primary/intermediate filters are not installed, the main filter needs to directly intercept large particles of dust, and the life span may be shortened by more than 50%. Shutdown maintenance If moisture-proof treatment is not done during long-term shutdown, the filter material may be moldy; Failure to check tightness before reactivation may result in leakage during initial operation. Summary and suggestion Core recommendations: Regularly monitor the pressure difference (recommended to use a pressure difference sensor), when the resistance reaches 1.5 times the initial value to clean or replace; Under high-temperature conditions, it is recommended to check the appearance of the filter material every quarter (such as whether it is discolored and embrittlement). Life extension techniques: add pre-filtration in a dust environment; Step cooling is used during shutdown (for example, from 300 ° C to 100 ° C is divided into 3 stages, each stage is 1 hour apart). By controlling environmental parameters, standardized maintenance, and selecting high-quality products, the service life of high-temperature high-efficiency filters can be stabilized at 2-3 years, and some high-end models can even reach more than 5 years. |
