In the chemical water treatment system of power plant, the quality requirements of compressed air are mainly concentrated in cleanliness, dryness, oil content and other aspects, the specific requirements are as follows:
cleanliness requirements
- dust particle size: The dust particle size in the purified gas should not be greater than 1μm to ensure that the compressed air will not pollute or wear the precision equipment in the chemical water treatment system.
- Maximum mass concentration: The maximum mass concentration of dust should not be greater than 1 mg/m & sup3;, to further ensure the cleanliness of compressed air.
Requirements for dryness
- dew point at working pressure: The dew point under working pressure is usually required to be -40°C or even lower (such as -70°C or -20°C, etc., depending on the application scenario and equipment requirements). The lower the dew point, the less the moisture content in the compressed air, the more beneficial to prevent the equipment in the chemical water treatment system from corrosion or scaling due to moisture.
Oil content requirements
- maximum oil content: The maximum oil content in compressed air should not be greater than 1 mg/m & sup3;, or even lower (such as 0.1 mg/m & sup3; or 0.01 mg/m & sup3;, etc.). Excessive oil content will cause compressed air to form an oil film in the chemical water treatment system, which will affect the heat exchange efficiency, and may even cause safety hazards such as fire.
Other Requirements
- pressure stability: The pressure of compressed air should be kept stable to meet the needs of various pneumatic equipment in the chemical water treatment system.
- Non-corrosive: Compressed air should be non-corrosive to prevent corrosion of metal equipment in the chemical water treatment system.
