The power industry, as a vital sector of a nation’s economy, relies heavily on the stable operation of equipment. During power generation, equipment wear poses a significant challenge, impacting both service life and production efficiency. Wear-resistant ceramic liners, with their exceptional performance, have become widely adopted in the power industry, offering an effective solution to mitigate equipment wear.
Below are specific applications of wear-resistant ceramics in the power sector:
1. Straight Sections of Pulverized Coal Conveying Pipelines
In coal-fired power plants, the pulverized coal conveying pipelines from the milling system to the boiler endure severe abrasion due to high-speed coal particles propelled by pressurized gas. Installing wear-resistant ceramic liners significantly enhances pipeline durability. For instance, a power plant utilized ceramic liners with 95% alumina content in straight pipeline sections. Long-term monitoring revealed an 80% reduction in wear compared to unlined pipelines. The service life of these pipelines extended from 1–2 years to 5–8 years, drastically reducing replacement frequency, ensuring stable coal conveyance, and avoiding production downtime caused by pipeline leaks.
2. Elbows in Pulverized Coal Conveying Pipelines
Elbows experience the most severe wear in coal conveying systems due to abrupt directional changes of coal particles, causing intense impact on inner walls. Wear-resistant ceramic liners, installed via specialized bonding techniques, effectively combat this wear. Some plants employ dovetail groove-structured ceramic liners secured with high-strength adhesives, enhancing stability under high-impact conditions. Practical applications show that such solutions extend elbow lifespan by over 10 times, reducing maintenance costs and safety risks.
3. Induced Draft Fan Blades
Induced draft fans expel high-temperature flue gas containing abrasive dust particles. The blades suffer thinning and deformation from continuous particle erosion, affecting fan performance. Applying ceramic liners to blade surfaces significantly reduces wear. A large thermal power plant reported lower blade wear rates and reduced vibration after retrofitting fan blades with ceramic liners. This upgrade improved operational reliability, saving hundreds of thousands of RMB annually in blade replacement costs.
4. Primary Fan Blades
Primary fans transport pulverized coal and combustion air, operating in similarly harsh environments. Combining laser cladding with ceramic liners has proven effective. A laser-clad transition layer is first applied to enhance blade toughness, followed by ceramic liner installation. This composite technology drastically improves wear resistance, ensuring stable operation of coal milling systems.
5. Absorber Towers in Wet Flue Gas Desulfurization (WFGD) Systems
Sprayed desulfurization slurry in absorber towers contains abrasive solids and corrosive acids, damaging components like trays and demisters. Installing ceramic liners on tray surfaces resists slurry erosion and corrosion, extending component lifespan. Additionally, the smooth ceramic surface minimizes slurry buildup, enhancing tower efficiency.
6. Wet FGD Recirculation Pump Components
Recirculation pumps circulate slurry within absorber towers, exposing components (e.g., impellers, casings) to severe wear. Ceramic liners applied to these parts significantly extend service life. One plant reported extending maintenance intervals from 3–6 months to 1–2 years after retrofitting pumps with ceramic liners, reducing costs and improving system stability.
Post time: Mar-10-2025