What are the air compressor water removal methods

Analysis of Water Removal Technology of Air Compressor

if the moisture in the compressed air is not removed in time, it may cause pipeline corrosion, pneumatic component failure, product quality degradation and other problems. The following from the technical principles and applicable scenarios, the system introduces the air compressor water removal method:

1. Pre-Physical Separation Technology

1. centrifugal separation
   • principle: Use the cyclone separator to produce high-speed rotation of the compressed air, and the water is thrown to the wall due to the density difference and discharged along the cone bottom.
   • Features: Can remove liquid water droplets with a diameter greater than 20μm, suitable for primary filtration, and requires regular cleaning of the sump.
2. Baffle Interception
   • principle: A multi-layer wave-shaped baffle is installed in the compressed air channel to force the airflow to change direction, and moisture accumulates and flows down after hitting the baffle due to inertia.
   • Features: The removal rate of water droplets above 10μm can reach 80%, and it is often used as a pretreatment unit in series with a precision filter.

2. precision filtration technology

1. coalescing filtration
   • principle: Multi-layer dense fiber filter element is adopted to capture small water droplets through the triple mechanism of direct interception, inertial collision and Brown diffusion.
   • Features: It can handle liquid water above 0.01μm, and needs to be equipped with an automatic drain. It is recommended to replace the filter element every 6-12 months.
2. ultrafine fiber filtration
   • principle: Use glass fiber or polyester fiber woven three-dimensional mesh structure to absorb moisture through surface tension.
   • Features: The removal efficiency of oil mist and moisture reaches 99.99, which is commonly used in high-standard gas consumption scenarios such as food and medicine.

3. adsorption drying technology

1. freeze drying
   • principle: The compressed air is cooled to 2-10°C through the refrigeration system, and the moisture is condensed into a liquid state and discharged.
   • Features: The pressure dew point can reach 2-10 ℃, which is suitable for general industrial gas. It is necessary to clean the condensate discharge pipeline regularly.
2. adsorption drying
   • principle the use of activated alumina, molecular sieve and other adsorbents, through physical adsorption to remove water.
   • Features pressure dew point can be as low as -70 ℃, suitable for electronics, precision manufacturing and other fields, need to be equipped with double tower alternating adsorption and regeneration system.

4. intelligent drainage technology

1. float type drainer
   • principle: Use the water level change to drive the float switch and automatically open the drain valve.
   • Features: The structure is simple and reliable, but the valve port must be cleaned regularly to avoid blockage.
2. Electronic level controller
   • principle: Real-time monitoring of liquid level through capacitive sensors, driving solenoid valve precise drainage.
   • Features: Can set the drainage interval and duration, reduce the loss of compressed air, suitable for unattended system.

5. system optimization strategy

1. pipeline design optimization: The main compressed air pipeline is designed according to a slope of 1-2 ‰, and the end is provided with a drain outlet to assist drainage by gravity.
2. Temperature control: Keep the temperature of the gas storage tank at 40-50°C to avoid a surge in condensed water caused by low temperature.
3. Regular maintenance: Establish a three-level filtration system inspection system, that is, daily inspection of automatic drainer, weekly inspection of filter element pressure difference, monthly inspection of compressed air dew point.

In summary, the air compressor water removal needs to use a combined solution. The user should select the appropriate water removal technology according to the gas quality requirements, ambient temperature and humidity and operating costs, and establish a standardized maintenance system to ensure the stable operation of the compressed air system.