High efficiency dissolved air flotation machine is often exposed to corrosive sewage, and anti-corrosion technology is crucial to its stable operation. I will analyze how anti-corrosion technology can help the equipment operate for a long time from the aspects of materials and surface treatment.
In the complex environment of sewage treatment, high efficiency dissolved air flotation machine faces erosion from various chemical substances in sewage, from acid and alkali components to heavy metal ions, which may cause damage to the equipment. The anti-corrosion technology is like putting on a layer of solid "armor" for the equipment, resisting the threat of corrosion from multiple levels, ensuring that the equipment can operate stably for a long time and continue to play an important role in sewage treatment.
Material selection is the first line of defense against corrosion. The key components of high efficiency dissolved air flotation machine will use materials with excellent corrosion resistance. For dissolved air tanks and flotation tanks that are in direct contact with sewage for a long time, stainless steel is often used. The alloy elements such as chromium and nickel added inside can form a dense oxide film on the surface. This film is like a natural barrier, effectively isolating the contact between corrosive substances in sewage and the metal body, greatly reducing the risk of rust and corrosion. Some equipment will also use special engineering plastics or fiberglass materials. These materials themselves have good chemical stability and strong resistance to corrosive media such as acids and alkalis, laying the foundation for the anti-corrosion performance of the equipment from the source.
The surface treatment process further enhances the anti-corrosion ability of the equipment. Common anti-corrosion coating spraying is one of the important means. During the equipment manufacturing process, the metal surface will be pre-treated first, and the rust, oil and impurities on the surface will be removed by grinding, sandblasting, etc., so that the surface reaches a certain degree of roughness, which can enhance the adhesion between the coating and the metal surface. Subsequently, professional spraying equipment is used to evenly spray high-performance anti-corrosion coatings on the surface of the equipment to form a continuous and tough protective film. This protective film can not only block the invasion of corrosive substances, but also has good wear resistance. Even if the equipment is slightly collided or rubbed during operation, it will not be easily damaged, and it will continue to provide protection for the equipment.
The structural design of the equipment also fully considers the anti-corrosion needs. Reasonable structural design can avoid the accumulation of sewage inside the equipment to form dead corners and reduce local corrosion caused by long-term retention of sewage. For example, the flotation tank adopts an inclined bottom design so that sewage can be discharged smoothly without residue; the pipe connection part adopts a smooth transition design to reduce the turbulence and eddy current of the water flow and avoid erosion of the pipe wall caused by water flow scouring. At the same time, the sealing structure of the equipment has also been carefully designed. The high-quality sealing material can not only prevent sewage leakage, but also prevent the outside air and moisture from entering the equipment, further reducing the possibility of equipment corrosion.
In the assembly and welding process of the equipment, the anti-corrosion process should not be ignored. Special welding processes and welding rods are used during welding to ensure that the metal structure of the welding part is uniform and avoid the gaps caused by welding defects from becoming a breakthrough for corrosion. After welding is completed, the welding part will be polished and anti-corrosion treated to make its surface smooth and have the same anti-corrosion performance as the main body of the equipment. In the process of equipment assembly, the installation accuracy of each component is strictly controlled to avoid stress concentration caused by improper assembly, because stress concentration parts are more prone to corrosion, and accurate assembly can effectively reduce this risk.
Anti-corrosion measures in daily maintenance are also an important part of ensuring the long-term and stable operation of equipment. Clean the surface of the equipment regularly to remove attached dirt and corrosive substances to prevent them from damaging the anti-corrosion coating. At the same time, check the anti-corrosion coating. Once local damage or aging is found, repair and re-spray it in time. In addition, according to the operating environment of the equipment and the characteristics of sewage, corrosion inhibitors and other anti-corrosion agents will be added regularly to further slow down the corrosion rate of the equipment and extend the service life of the equipment.
The anti-corrosion process of the high efficiency dissolved air flotation machine builds an all-round anti-corrosion system through the synergy of multiple links from material selection, surface treatment, structural design, to assembly welding and daily maintenance. These processes cooperate with each other to effectively resist the invasion of various corrosive factors in sewage, ensure that the equipment can operate stably and long-term in a complex sewage treatment environment, and provide reliable guarantee for the continuous and efficient development of sewage treatment.
