Series of hazards caused by poor compressed air quality to production

Series of hazards caused by poor compressed air quality to production

Compressed air is an important source of power in industry. Compressed air is the second largest power source in industry after electricity. Compressed air contains harmful substances such as water, oil, and particulate impurities. If it is not effectively treated, it will cause great harm to pneumatic equipment and processes. The compressed air purification industry has been paid more and more attention.

　　 Can the compressed air be used directly?

When the air is compressed, the moisture does not run out of the compression chamber, which directly causes the density of water vapor in the air to increase; all the gas from the compression unit of the compression system does not contain oil, but the temperature is very high, and the relative humidity will reach 100% ; In short, after the compressed air is compressed, the temperature rises, the moisture content per unit volume increases, and the oil content increases...Do not use it directly.

　　Research has shown that more than 85% of the causes of malfunction or shutdown of the pneumatic system are related to the use of unclean, non-dry compressed air. Impurities in compressed air include moisture, oil stains and solid particles, etc., which will damage the spraying process. The series of hazards caused by water in compressed air to production In the process of compressed air manufacturing, the temperature tends to gradually drop. At the beginning, because the air is compressed at a higher heat temperature, the moisture in the air protects the vaporization state. When it flows in the pipe, the surrounding environment will exchange heat, which will make the compressed air slowly cool down. The lower the air temperature (the ambient air temperature), the compression The water vapor in the air is more likely to condense. When the compressed air is released from the discharge port in use, the pressure suddenly decreases, the volume expands, and the temperature decreases, which will cause the water vapor in the compressed air to further condense into water.

　　 The main hazard caused by the water in the compressed air is: the condensed water on the pneumatic equipment will take away the lubricating oil, causing the equipment efficiency to decrease or even damage. Condensate will also accelerate the wear and damage of valves in the pipeline. Condensate will also accelerate the wear of valves in the pipeline, causing failure or misoperation of the gas control equipment; causing corrosion of the pipeline and equipment. If the water freezes at the low point of the pipeline, the pipeline may burst. The water mist contained in the compressed air used for spraying will affect the adhesion of the paint on the workpiece and cause the painting to fail.

The series of hazards are as follows: Corroded pipes; Sticking to dust and blocking the pipes; Mixing with raw materials, affecting product purity, resulting in increased defective products; Forming a "water hammer" phenomenon in the pipes, destroying gas equipment; affecting the operation speed of high-speed equipment, causing The production efficiency is low; the oil vapor in the compressed air is harmful to the production. The oil in the compressed air comes from air, and some is because the air compressor used needs to be lubricated with lubricating oil. When the compressor is severely worn or the temperature is high, the lubricating oil will also be mixed into the compressed air, which will bring many problems to the operation and maintenance of the equipment.

　　 If the oil vapor content in the air is too high, the temperature of the air is high during the compression process and exceeds its explosive limit, which will cause an explosion or combustion. Air spraying with oil-containing compressed air will cause the coating film to shrink and wrinkle into orange peel due to the interaction between the oil stain and the coating, and the gloss and durability of the coating film will deteriorate, which will seriously affect the coating quality. So before entering the system, the oil in the compressed air must be removed.