Mitigating Wear and Tear in Dust Removal Ducts: Causes and Protective Measures

Dust removal duct wear analysis and preventive measures are crucial aspects of maintaining an efficient industrial system. This article explores the harms of duct wear, factors influencing it, and effective strategies to prevent and mitigate wear, emphasizing the use of advanced materials like wear-resistant ceramics.

I. The Hazards of Dust Removal Duct Wear

Dust removal duct wear is a common occurrence, primarily concentrated in areas with irregular structures such as bends and intersections. While straight ducts experience relatively minimal wear, the bottom of the duct is susceptible, and wear can also manifest at the top when dust accumulates. The consequences of wear include air leakage, compromising dust control effectiveness, impairing the functionality of dust removal systems, and, in extreme cases, leading to system failure. Elevated ducts face additional risks as wear can rapidly decrease their strength and rigidity, posing safety hazards. Therefore, a proactive approach to understanding and addressing duct wear is essential.

II. Factors Influencing Dust Removal Duct Wear

1. Effect of Internal Air Velocity: The velocity of air within the duct determines the movement and collision speed of dust particles.

2. Impact of Dust Concentration: The concentration of dust particles in the air plays a significant role.

3. Influence of Incidence Angle: The angle of incidence affects wear, and it's crucial to consider this factor in system design.

4. Effect of Friction Coefficient: The coefficient of friction is related to the hardness of dust particles, wall material hardness, surface geometry of particles, and duct surface roughness, requiring a comprehensive consideration.

III. Measures to Prevent Wear

Efficient wear prevention measures encompass both wear resistance and durability. Addressing wear problems can involve the following technical measures:

• Control Internal Air Velocity: Maintain optimal air velocity within the duct while ensuring dust does not settle.

• Optimize Dust Hood Design: Design efficient dust hood structures and extraction points, controlling hood air velocity to minimize the impact of excessive or coarse dust particles on the duct.

• Design Appropriate Bend Radii: Design bends and intersections with suitable curvature radii, increasing wall thickness by 1-2mm at these points.

• Utilize Wear-Resistant Composite Ducts: Consider materials like wear-resistant ceramics, wear-resistant cast iron, wear-resistant cast stone, wear-resistant rubber, and wear-resistant coatings.

Sanxin New Materials Co,.Ltd produces wear-resistant ceramic pipes designed for systems transporting highly abrasive powders and slurries. The outer shell is steel, while the inner lining consists of wear-resistant alumina ceramics, combining high-temperature wear resistance and corrosion resistance of ceramics with the strength and toughness of steel. This integrated design facilitates easy replacement and installation.

Importantly, these wear-resistant ceramic composite ducts overcome the longstanding challenge of wear in industrial pipelines. They have replaced a significant portion of elbows and pipes in pneumatic conveying systems across industries such as power generation, metallurgy, steel production, coal, cement, petroleum, and chemicals. Customer usage testimonials indicate that adopting wear-resistant ceramic ducts can effectively extend equipment lifespan by more than 10 times.

By understanding the harms of duct wear and implementing effective preventive measures, industries can enhance the longevity and efficiency of their dust removal systems. The integration of advanced materials like wear-resistant ceramics is pivotal in achieving sustainable and reliable industrial operations.

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