Causes and Treatment Methods of Air Compressor Blowing Gas with Water
1. root cause analysis
- physical characteristics of air humidity and compression process
- water-containing nature of air: The air itself contains moisture (humidity). After compression, the volume of the air decreases and the temperature rises, forming a supersaturated state, and the excess water is precipitated in the form of condensed water.
- Condensation effect of gas storage tank: The temperature of compressed air in the air storage tank drops sharply, and a large amount of water vapor liquefies to form condensed water. If it is not discharged in time, it will enter the back-end pipeline with the gas.
- Equipment failure and lack of maintenance
- drainage system failure: Automatic drain blockage (such as physical blockage, electronic component failure) or manual drain valve is not regularly opened, resulting in condensate accumulation.
- Insufficient drying equipment: No dryer is installed, or the dryer (such as cold dryer and suction dryer) has insufficient processing capacity, failure (such as blockage of the radiator of the cold dryer), and cannot effectively remove water.
- Pipeline design defect: The pipeline is too long, the elbow is too large or the drainage point is not set, which causes the compressed air to condense twice in the flow and the water stays.
- Environmental and operational factors
- high ambient humidity: The room is wet or seasonal humid weather, increasing the air moisture content.
- Improper maintenance: The filter element is not replaced in time, and the cooling system leaks (such as the cooler leaks), causing moisture to enter the gas.
2. Systematic Solutions
1. Optimize the drainage system
- regular drainage: Manually drain the condensed water from the low point of the air storage tank and pipeline before starting up daily to avoid water accumulation.
- Upgrade automatic drainer:
- choose electronic automatic drainer (with fault alarm function) or physical float drainer to ensure that the blockage can be found in time.
- Recommended installation position: the bottom of the gas tank, the lowest point of the pipeline, and the rear end of the dryer.
- Check drain line: Ensure that the drain pipe is free of blockage and back pressure to avoid backflow of condensed water.
2. Enhanced drying treatment
- install dryer:
- cold dryer: Suitable for general industrial needs, the dew point can be reduced to 2-10 ℃, and the radiator needs to be cleaned regularly (once a quarter is recommended).
- suction dryer: Suitable for low dew point requirements (such as -40 ℃ to -70 ℃), the need to regularly replace the adsorbent (such as activated alumina, molecular sieve).
- Matching processing amount: The processing capacity of the dryer should be 20% larger than that of the air compressor to avoid overload operation.
- multistage drying: For humidity-sensitive scenes (such as medicine and electronics), cold dryer and suction dryer can be connected in series to improve water removal efficiency.
3. Improve environment and operation
- control room humidity: Use a dehumidifier to control the ambient humidity below 50% to reduce the air moisture content.
- Pretreated air: Install a pre-filter (such as 1μm accuracy) at the inlet of the air compressor, and configure a pre-cooler to reduce the temperature of the intake air.
- Optimized piping design:
- reduce the number of elbows and ensure that the pipeline slope is ≥ 1:100 to ensure that the condensate flows naturally to the drainage point.
- Automatic drain valves shall be added at the lowest point of the pipeline at intervals of 50 meters.
4. Regular maintenance and inspection
- replace consumables: Replace the air compressor filter element and oil core every 2000 hours, and replace the dryer adsorbent every 5000 hours.
- Check the cooling system: Repair the leakage of the cooler, clean the dust on the surface of the radiator, and ensure the cooling efficiency.
- Equipment maintenance: Deep cleaning of the air compressor every quarter, check the wear of seals, valves and other parts.
5. Upgrade post-processing equipment
- precision filtration: A precision filter (0.01μm accuracy) is installed at the rear end of the dryer to further remove residual moisture and oil.
- multistage filtration system for special industries (such as food, medical), multi-stage filtration (such as activated carbon filter HEPA filter) can be configured to ensure gas quality.
3. Summary
the problem of water content in the gas blown out by the air compressor needs to be solved through a comprehensive scheme of "source control (humidity reduction) + process treatment (drainage, drying) + end filtration (precision purification). Regular maintenance of equipment and optimization of operation process are the key to ensure long-term stable operation. If the problem persists, it is recommended to contact a professional engineer for system diagnosis to avoid secondary problems such as equipment corrosion and product quality degradation due to moisture.
