In industrial fields such as thermal power generation, pulverized coal transportation is the core link in the production process. As a key component of the pulverized coal conveying system, the structural design and performance parameters of the wear-resistant elbow of the pulverized coal conveying pipeline play a decisive role in ensuring the continuous and efficient transportation of pulverized coal.

The wear-resistant elbow of the powder feeding pipeline is networked in the pulverized coal conveying system, covering the main conveying path from the outlet air box of the pulverized coal mixer, the powder exhaust fan to the burner and the tertiary air outlet. At the same time, the outlet air box of the powder exhaust fan is connected with the recirculation air pipe at the inlet of the coal mill. This spatial layout ensures that it covers the key nodes of the whole process of pulverized coal transportation and provides physical support for the directional transmission of materials.

Aiming at the problem of erosion wear caused by high-speed flow of pulverized coal, the wear-resistant elbow of the powder feeding pipeline is designed with a composite structure lined with wear-resistant ceramics. The wear-resistant ceramic material has significant engineering characteristics : First, the Vickers hardness can reach more than 1500 HV, which can effectively resist the erosion and wear caused by pulverized coal particles, and extend the service life of the elbow to 5-8 times that of the ordinary carbon steel elbow ; secondly, the material has excellent chemical stability, and can effectively resist material corrosion in an industrial environment with a pH value of 2-12.Thirdly, the surface roughness of ceramics is Ra ≤ 0.8μm, which is 60 % lower than that of traditional metal materials, which can effectively reduce the conveying resistance of pulverized coal and improve the energy efficiency of the system.

Compared with other wear-resistant materials, wear-resistant ceramics are more balanced in terms of wear rate, temperature resistance and chemical stability, which can effectively improve the operational reliability and economy of industrial systems.

With its scientific system layout and high-performance wear-resistant ceramic lining technology, the wear-resistant elbow of powder feeding pipeline has become the core equipment in modern industrial pulverized coal conveying system. The technical scheme realizes the double breakthrough of equipment reliability and economy by optimizing material performance and structural design, and provides a reliable guarantee for the efficient and stable operation of industrial production.