Air compressor cooling water requirements

The requirements for cooling water of air compressors usually include the following aspects:

1. Water quality requirements

1. Clean and free of impurities: The cooling water should not contain suspended substances, silt, sand, oil and other impurities to prevent blocking the cooling system, affecting the cooling effect, and even damaging the equipment.
2. Moderate pH: The pH value of cooling water should be controlled between 6.5 and 9.5, preferably neutral, to avoid corrosion of the cooling system by overacid or excessive alkali.
3. Low hardness: The hardness of cooling water (mainly the content of calcium and magnesium ions) should be as low as possible to reduce the formation of scale. Scale will adhere to the tube walls of the cooling system, reducing heat transfer efficiency and increasing energy consumption.
4. Low salt content: The salt content in cooling water should be controlled within a certain range to reduce corrosion to the cooling system.
5. Low organic content: The organic content in cooling water should be as low as possible to prevent microorganisms from growing, resulting in contamination of the cooling system.

2. Temperature requirements

1. Inlet temperature: The inlet temperature of cooling water generally does not exceed 30℃, and the inlet temperature in hot areas does not exceed 35℃ for a short period of time. Excessively high inlet temperature will reduce the cooling effect and increase energy consumption.
2. Output temperature: The outlet temperature of cooling water generally does not exceed 40℃ to 45℃, depending on the type of air compressor and usage scenario. Excessive water outlet temperature will affect the normal operation and life of the air compressor.

3. Pressure and flow requirements

1. Water supply pressure: The water supply pressure of cooling water should meet the needs of the air compressor, generally controlled between 0.2 and 0.5 MPa, and the pressure difference between inlet and return water should be above 0.15 MPa.
2. Flow Requirements: The flow of cooling water should be calculated and determined based on the power and usage environment of the air compressor. Insufficient flow can lead to poor cooling effect, and excessive flow can lead to energy waste.

4. Other requirements

1. Softening treatment: For cooling water with higher hardness, softening treatment should be carried out to reduce the formation of scale. The softening method includes a drug softening method and an ion exchange softening method.
2. Replace and clean regularly: The cooling water should be replaced regularly to keep the water quality clean. At the same time, the cooling system should be cleaned regularly to prevent the accumulation of scale and dirt.
3. Standby cooling water source: In order to ensure the continuous and stable operation of the air compressor, a backup cooling water source should be prepared to prevent the main cooling water source from switching in time when there is a problem.

5. Precautions

1. Avoid using corrosive water quality: Avoid using water containing corrosive substances as cooling water to avoid causing damage to the cooling system.
2. Monitoring and Adjustment: The temperature, pressure and flow parameters of the cooling water should be monitored in real time, and adjusted as needed to ensure the best cooling effect.

To sum up, the requirements for cooling water of air compressors involve multiple aspects such as water quality, temperature, pressure and flow. In order to ensure the normal operation of the air compressor and extend the service life, the cooling water should be selected, processed and used strictly in accordance with these requirements.