Water content in air of air compressor

In the process of compressing air, because the air itself contains moisture (ie humidity), the moisture in the compressed air precipitates and becomes a liquid, resulting in a certain amount of moisture in the compressed air. The following is a detailed analysis of the water content in the air in the air compressor:

sources of water content in 1. air

1. natural humidity: The air always contains a certain amount of moisture, that is, humidity. When the air is compressed, due to the increase in pressure, the water molecules in the air will be more likely to gather and separate out as a liquid.
2. Ambient humidity if the ambient humidity of the air compressor is high, the moisture content in the air sucked into the air compressor will increase accordingly, resulting in an increase in the moisture content in the compressed air.

Effect of water content in 2. air

1. equipment damage: Excessive moisture will cause equipment rust, corrosion, and even damage to key components, shortening the service life of the equipment.
2. Decreased product quality: In the production process that requires high-quality compressed air, excessive moisture may affect the quality and performance of the product. For example, in the process of painting, spraying, etc., excessive moisture can cause problems such as blistering and peeling of the coating.
3. Increased energy consumption: Excessive moisture will reduce the working efficiency of the air compressor, thereby increasing energy consumption.

Standard and Detection of Water Content in 3. Air

1. standard: According to national standards or industry standards, the water content of compressed air under specific conditions is clearly specified. For example, in the standard GB/T3853-2018 "Technical Conditions for Air Compressors", it is stipulated that the saturated water content of compressed air is 30 mg/m & sup3 when the relative humidity is 100 at 30 ℃; Under the standard gas volume system, the mass flow rate of the open package shall not exceed about 0.1 mg/m & sup3; The amount of moisture. Air compressors used in specific industries should also be tested according to the industry's standards. In addition, in general, the water content in the air of the air compressor should not exceed 80ppm (water content per cubic meter of gas does not exceed 80 mg).
2. Detection: Detect the water content in the air output of the air compressor, generally using a dew point meter or capillary method. Among them, the dew point meter has higher accuracy and can detect the water content of 0.001ppm; while the capillary method has certain errors in detecting the water content, but the operation is simple, and it can be considered for smaller air compressors.

4. methods for reducing water content in air

1. install dryer: Dryer is a kind of equipment specially used to reduce the water content of air. By installing and using the dryer, the moisture in the air can be effectively removed and the quality of compressed air can be improved.
2. Regular maintenance the air compressor needs to be maintained and cleaned after a period of use to ensure its normal operation and smooth discharge of water. During the maintenance process, special attention should be paid to cleaning the easily blocked parts such as the condenser and trachoma to avoid the blockage and the water cannot be discharged smoothly.
3. Use automatic drainer: The automatic drain can automatically discharge the condensed water at regular intervals, thereby effectively reducing the moisture content in the compressed air. The physical drainer relies on the buoyancy of the buoy in the drainer to open the drainer. The electronic automatic drainer matches the solenoid valve with the solid-state electronic timer of the analog circuit to realize the timed automatic discharge of condensed water in the compressed air system.

5. considerations

1. select the appropriate air compressor model: When choosing an air compressor, the appropriate model and specifications should be selected according to actual needs and working conditions to ensure that it can meet the needs of the production line and reduce energy consumption.
2. Reasonable layout of pipelines: When laying out the pipeline, try to avoid the occurrence of pipeline leakage or water accumulation to reduce the moisture content in the compressed air.

In summary, the air compressor will produce a certain amount of moisture in the process of compressing air. In order to reduce the water content in the air and improve the quality of compressed air, it is necessary to take a series of measures and methods for control and detection.