Application principle of boiler spraying

       

wococarbide.com explains to you how boiler spray works: liquid combustion, such as kerosene, enters the combustion chamber through a small hole. After being atomized and mixed with oxygen, it is ignited, and a strong gas-phase reaction occurs. The heat released by the combustion can cause the product to expand violently. The expanding gas flows through the Laval nozzle. Constraints on the formation of high temperature flame flow in sonic spraying. Flame heating accelerates the sprayed material to reach the surface of the substrate to form a high-quality coating.  g boiler spraying is the combustion of propane, propylene and other hydrocarbon gases or hydrogen and high pressure oxygen. High-temperature, high-velocity combustion flame flow produced by combustion in a combustion chamber or special nozzle. The combustion flame velocity can reach Mach 5 (1500m/s). )above. Commonly referred to as HVOF (High Velocity Oxygen Fuel). The powder is fed axially into the flame, the ejected particles can be heated to a molten or semi-molten state, and accelerated to a speed of up to 300-500m/s, or even higher, resulting in high bond strength and compactness. of high-quality coatings. .Supersonic flame speed is high, but the temperature is relatively low. For WC-Co cemented carbide, the decomposition of WC can be effectively suppressed during the spraying process. The coating not only has high bonding strength, but also is dense and has excellent wear resistance. Its wear resistance greatly exceeds that of plasma sprayed coatings, which is equivalent to explosive sprayed coatings, and also exceeds that of electroplated hard chrome coatings and sprayed fusion coatings. It is widely used. The purpose of boiler spraying is mainly because the boiler is under high pressure and high temperature, and at the same time, it is corrosive to salt batteries and oxygen corrosive in its water environment. The protective effect of spraying is to add a protective film on the boiler to separate the metal from the medium in the air, thereby exerting a certain protective effect on the boiler and extending its service life.

wococarbide.com is committed to the spraying business, increasing the service life of the boiler and reducing the cost, and the boiler spraying is widely used in many industries. Large-scale reasonable and effective protection technology has been widely used. For steel structural parts that are often exposed to the outdoors, spraying lead, zinc and other alloys coatings instead of traditional painting methods are used to carry out long-term air anti-corrosion. widely developed. Such as large-scale projects such as TV towers, bridges, highways, microwave towers, high-voltage transmission towers, underground cable support frames, beacon buoys, shafts and shafts, etc., spraying lead, zinc and their alloys are used to implement anti-corrosion. Today, there are dozens of professional spraying factories in China engaged in this work. This technology is not only widely popularized and applied in China, but also has achieved good popularization and application in foreign aid projects. Boiler spraying uses supersonic spraying technology to repair and strengthen the localization of large-scale important equipment and imported parts. In recent years, there have been many successful application examples in this regard. Therefore, it is necessary to spray the boiler.