Standard for Compressed Air Requirements for Textile Mills

Compressed air requirements for textile mills covered by the standard pressure, oil content, water content, dust content, pressure dew point and stability and other aspects, the specific requirements are as follows:

1. pressure requirements:
   • air-jet looms and other equipment have clear requirements for compressed air pressure, which usually needs to reach more than 0.5MPa to ensure the normal operation of weft insertion and other processes.
   • The supply pressure of compressed air shall be stable, and the pressure fluctuation shall be controlled within a small range (e. g. ± 0.01MPa) to avoid impact on production.
2. Oil content requirements:
   • the oil content in the compressed air needs to be strictly controlled, and the oil content is generally required to be less than 0.6 mg/m & sup3; to prevent oil from polluting the fabric, nozzles and reeds, affecting the jet force and weft insertion effect.
   • For the production of high-quality textiles such as filaments and fine high-density fabrics, it is recommended to use an oil-free air compressor to ensure that the compressed air is completely oil-free.
3. Water content requirements:
   • the moisture content in the compressed air should be controlled within a certain range to prevent the pipe wall from rusting, attaching dust, increasing the pressure loss of the gas transmission, and polluting the loom parts and fabrics.
   • Generally, the pressure dew point temperature of compressed air is 4-10 ℃, which meets the level 4 standard in ISO 8573-1 air quality grade standard. For higher requirements of the occasion, the pressure dew point can be set below -20 ℃, to meet the moisture content classification of level 2 requirements.
4. Dust content requirements:
   • the amount of dust in the compressed air must be strictly controlled to prevent accelerated compressor wear, affecting the efficiency and service life of the loom, and contaminating the fabric surface.
   • Generally, it is required that the dust content of compressed air is ≤ 1 mg/m & sup3;, and the dust particle size is ≤ 3-5μm, that is, it meets the level 2 standard in ISO 8573-1 air quality grade standard.
5. Stability requirements:
   • in the production process of textile mills, the flow and pressure of compressed air need to be stable to meet the needs of multiple equipment running at the same time.
   • Centrifugal compressors should be used in places where the number of looms is large, the compressed air consumption is large, and the gas pressure is low and stable. Screw compressors or centrifugal and screw compressors should be used in parallel when the gas pressure is high and the flow rate changes greatly and multiple machines are required to be connected in parallel.
6. Other Requirements:
   • the design of the compressed air station needs to consider noise control to meet the requirements of the noise hygiene standards of industrial enterprises.
   • Compressed air system needs to be equipped with corresponding post-processing equipment, such as precision filters, adsorption dryers, etc., to ensure that the quality of compressed air to meet production needs.