Which parts of the power plant are classified as high-risk vibration areas, and PULS blankets are preferred over ordinary ceramic fiber blankets?
Release Time: 2026-11-06
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Which parts of the power plant are classified as high-risk vibration areas, and PULS blankets are preferred over ordinary ceramic fiber blankets? In the insulation operation and maintenance of thermal power plants, many insulation failures are not simply caused by high temperatures, but by the combination of "continuous mechanical vibration+unit start stop thermal cycle impact". Ordinary ceramic fiber blankets have weak tensile properties and insufficient fiber interweaving. They are prone to delamination, pulverization, settling, and overall detachment under long-term vibration conditions, forming local hotspots, increasing heat dissipation losses, and posing safety hazards during on-site inspections. For high-risk vibration points in power plants, Rosewool Insulation Refractory Co.,Ltd. 's upgraded "PLUS Ceramic Fiber Blanket" has become the preferred insulation lining material for such working conditions due to its high tensile strength, high rebound, low slag ball, and resistance to repeated thermal shock. List of Typical High Risk Vibration Parts in Power Plants
1. "Turbine body area (highest risk)": high and medium pressure cylinder body, cylinder split flange, cylinder head, exhaust port, and cylinder connecting steam duct. The continuous rotation of the unit brings low-frequency continuous vibration, combined with a large temperature difference between start and stop, and ordinary insulation is prone to seam opening, hollowing and sliding, making it a hot and high-risk area for power plants. 2. "Large rotating auxiliary equipment parts": induced draft fan, supply fan, primary fan housing, fan inlet and outlet expansion joints, fan inlet and outlet flue; Various high-temperature centrifugal pumps, feed pumps, booster pumps, pump bodies, and inlet and outlet short pipes are subjected to dual effects of fluid impact and rotor vibration, and the insulation layer fastening structure is subjected to alternating stress for a long time. 3. "Abnormal shape and impact section of steam and water pipeline": main steam, reheated steam, extraction steam, drainage pipeline elbows, tees, reducers, flanges, valve bodies; Two phase flow drainage pipelines experience significant impact and vibration of the medium, and the insulation near the pipeline supports and hangers, as well as at the pipeline limit position, is prone to cracking and detachment from the fixed points. 4. "SCR denitration and high-temperature flue vibration section": The inlet and outlet flue of the denitration reactor, the flue compensator, and the coupling position of flue gas flushing and vibration not only have continuous vibration, but also high-speed dusty flue gas flushing. Ordinary fiber blankets are prone to rapid pulverization and loss. 5. "Boiler auxiliary vibration components": The boiler header, exhaust pipe, safety valve, and exhaust muffler connecting pipe experience severe impact vibration during start stop pressure relief, greatly reducing the service life of conventional insulation.
Rosewool Insulation Refractory Co.,Ltd. PLUS blanket has core functional advantages compared to ordinary ceramic fiber blankets
Ordinary ceramic fiber blankets use conventional needle punching technology, which results in high slag ball content, weak fiber interweaving, low tensile strength, fiber brittleness and delamination settlement after repeated vibration and cold and hot cycles, thinning of insulation layer, and appearance of voids. Generally, large-scale repairs are required within 1-2 years.
Rosewool Insulation Refractory Co.,Ltd. PLUS ceramic fiber blanket has been fully upgraded in terms of raw materials and needle punching technology, with outstanding advantages in core indicators:
"Ultra high tensile strength": Under the same density, the tensile strength can reach ≥ 110kPa, far higher than the national standard and ordinary blankets. The fibers are interwoven and locked in a three-dimensional manner, and are not easily torn or layered by repeated vibration and pulling. The fiber structure is not easy to fall apart.
"Extremely low slag ball content": The slag ball content is ≤ 5%, much lower than that of ordinary ceramic fiber blankets, with fewer impurities. The fibers remain flexible at high temperatures, are not easily brittle or powdery, reduce dust, and have long-term stable insulation performance.
"Excellent rebound performance": The rebound rate is ≥ 85%, and the thickness can be restored after compression. Vibration, fastening, bundling, and compression will not permanently compact or collapse, and the insulation thickness will be continuously maintained to avoid a surge in thermal conductivity and the generation of hot spots.
"Lower thermal conductivity": At 500 ℃, the thermal conductivity is ≤ 0.135W/(m · K), which has better insulation and energy-saving effects. Under the same insulation thickness, the heat dissipation loss is smaller, helping the unit improve efficiency and reduce consumption.
"Anti thermal shock, suitable for frequent start stop": no organic adhesive, resistant to the alternating cold and hot impacts of unit start stop, low thermal shrinkage rate, and the joint position is not easily cracked due to temperature difference pulling; Cutting without burrs, reducing on-site construction dust, fitting complex surfaces such as cylinders, flanges, and valve bodies, filling densely, and reducing thermal bridges.
"Safety and Environmental Protection": A-level non combustible, asbestos free, good chemical stability, acid and alkali resistant flue gas erosion, suitable for high temperature flue gas and steam conditions in power plants.
Rosewool Insulation Refractory Co.,Ltd. has been deeply involved in high-temperature insulation supporting for power plants for many years. The supporting products include a full range of industrial insulation and refractory products such as PLUS ceramic fiber blankets, ceramic fiber boards, calcium silicate boards, etc., serving multiple domestic thermal power, solar thermal energy storage, and chemical projects, including Jiangyin boiler and multiple power plant turbine insulation renovation projects. We can provide material selection, thickness schemes, and construction technical guidance based on unit operating conditions, temperature, and vibration levels, support customized specifications and bulk supply, and can provide complete testing reports and technical data in conjunction with bidding projects.
