Inventory of high-risk vibration areas in power plants: why do these areas have to use PLUS blankets instead of ordinary ceramic fiber blankets?
Release Time: 2026-11-06
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Inventory of high-risk vibration areas in power plants: why do these areas have to use PLUS blankets instead of ordinary ceramic fiber blankets? In power plants, the continuous vibration generated by equipment operation is the "invisible killer" of insulation layer failure. Ordinary ceramic fiber blankets are prone to problems such as fiber breakage, insulation layer falling, and seam opening in long-term vibration environments, ultimately leading to overheating of equipment casings, increased energy consumption, and even safety hazards. Rosewool Insulation Refractory Co.,Ltd. , as a source manufacturer with more than 40 years of deep cultivation in the industry, combines a large number of power plant engineering practices to systematically sort out the high-risk vibration areas of power plants and the selection advantages of PLUS blankets for you. Five high-risk vibration areas in power plants
1. Steam turbine cylinder body (high-pressure cylinder, intermediate pressure cylinder)
During the operation of the steam turbine, the rotor rotates at high speed and the cylinder body continuously experiences high-frequency vibration. Under long-term vibration, the fiber structure of ordinary ceramic fiber blanket gradually loosens, causing hollowing and falling of the insulation layer, resulting in an increase in temperature difference between the upper and lower parts of the cylinder body, which affects the efficiency of the unit. Especially during the start-up and shutdown of the unit, the thermal expansion and contraction of the cylinder body are combined with vibration, and ordinary blankets are prone to tearing at the flange joint surface. 2. Main steam pipeline and reheated steam pipeline
High temperature and high-pressure steam flows at high speed inside the pipeline, causing continuous flow induced vibration. The vibration of pipeline bends, tees, reducers and other parts is particularly obvious due to changes in flow direction. Ordinary blankets are prone to tearing in these areas due to repeated stress, forming thermal bridges when the seams are opened, resulting in local overheating. 3. Fan and pump body
Rotating equipment such as induced draft fans, forced draft fans, feedwater pumps, and circulating water pumps experience severe vibrations during operation. If the tensile strength of the insulation layer on the equipment shell is insufficient, it will loosen due to vibration, and in severe cases, the whole piece may fall off, which not only affects the insulation effect but may also injure the equipment or personnel. 4. Pipeline support hangers and flange connections
The support and hanger bear the dual effects of thermal displacement and vibration of the pipeline, while the flange connection generates micro vibrations due to fluctuations in bolt tightening force. The insulation layer in these areas is prone to fatigue damage due to repeated displacement, forming thermal bridges. Ordinary blankets often experience damage at the base of the support hanger. 5. Surrounding the boiler burner and SCR ammonia injection grille
The airflow pulsation in the burner area is strong, and the ammonia spray grille vibrates due to the impact of ammonia injection. In this environment, the fibers of ordinary blankets are easily washed and peeled off by air currents, resulting in thinning of the insulation layer and local overheating. Meanwhile, the acidic corrosion environment in the SCR area will accelerate the aging of ordinary blankets.
The actual effect of PLUS blanket in high-risk vibration areas:
Turbine body: High tensile strength, tied with stainless steel wire mesh, insulation layer tightly attached to the surface of the cylinder body, long-term vibration does not crack or fall off
Main steam pipeline elbow: good flexibility, can tightly wrap around the curved surface of the elbow, high tensile strength, and the joint does not open
Fan pump body: rebound rate ≥ 85%, good recovery after compression, insulation layer does not collapse
Supports, hangers, flanges: can be cut into insulation gaskets, resistant to vibration fatigue, and will not pulverize after long-term use
Surrounding burner: slag ball content ≤ 5%, pure fibers, strong resistance to airflow erosion
Rosewool Insulation Refractory Co.,Ltd. , as a leading manufacturer of insulation and refractory materials with over 40 years of experience, provides professional solutions for high-risk vibration areas in power plants
Product advantages:PLUS blanket has a temperature resistance of 1360 ℃, tensile strength ≥ 110KPa, slag ball ≤ 5%, rebound rate ≥ 85%, designed specifically for high vibration working conditions
Supporting services: can be equipped with stainless steel wire mesh, high-temperature adhesive, anchoring components, and provide an integrated solution of "materials+construction"
Qualification guarantee: Passed ISO9001 certification, provided third-party testing reports, products comply with DL/T 776 power industry standards
Engineering experience: The product has been successfully applied to multiple power generation enterprises such as Huaneng and Huadian, and its quality has been verified by the market
Direct supply from the source: Annual production of 80000 cubic meters, regular specifications can be shipped within 72 hours, and the price advantage of bulk procurement is obvious.
