Rosewool Insulation Refractory Co.,Ltd.
What are the application locations and selection levels of aluminum silicate blanket refractory insulation materials in power plants? Aluminum silicate blanket is widely used for thermal insulation of 400-1200 ℃ high-temperature equipment in power plants due to its high temperature resistance, low thermal conductivity, light weight, good flexibility, and thermal shock resistance. It is mostly used for inner high-temperature backing insulation and is often used in combination with rock wool and calcium silicate board. The ultra-high temperature of power plant steam turbines determines that the insulation material to be used must be high temperature resistant and not easily powdering. Aluminum silicate blanket is highly preferred for insulation materials in power plants due to its evaluation of its own characteristics;
Aluminum silicate blanket (ceramic fiber blanket) is widely used in power plants, covering almost all high-temperature areas from boilers to turbines, from main steam pipelines to flue systems. At present, the demand for insulation materials in power plants has shifted from traditional calcium silicate products to aluminum silicate fiber cotton products, especially the growth of aluminum silicate fiber blankets is particularly prominent.
The insulation layer thickness of the boiler furnace wall is usually 180-200mm, and the hot surface temperature is about 450 ℃. The inner insulation layer is made of 40-50mm aluminum silicate fiber blanket, with 2-3 layers of mineral wool products added. Aluminum silicate blanket should also be used for insulation treatment in high-temperature heating surface areas such as rear screen superheater, final stage superheater, and high-temperature reheater;
The surface temperature of the steam turbine cylinder can reach 550 ℃. The insulation thickness of the upper cylinder is 200mm, and the lower cylinder is 250mm as the standard. During construction, the adhesive method is used, with a mesh fixed in the middle and a mesh covering the surface. The upper part of the high and medium pressure outer cylinder is usually laid with seven layers of aluminum silicate needle punched blanket.
the total insulation thickness of main steam pipeline above DN500 can reach 260mm, and the composite structure of multi-layer aluminum silicate fiber blanket+nano aerogel blanket is adopted. High purity aluminum silicate blanket should be used for steam pipelines (540-600 ℃) in thermal power plants;
The lining of the high-temperature furnace flue gas pipeline uses aluminum silicate fiber blanket as the insulation layer. Aluminum silicate fiber felt can also be attached to the inner surface of the flue to increase the temperature of the hot air.
The high-temperature heating surface area inside the boiler large package box (such as the rear screen superheater, final stage superheater, and high-temperature reheater) needs to be insulated and remade with aluminum silicate blanket. Aluminum silicate fiber cotton is also commonly used for filling rigid beams, expansion joints, and sealing and plugging parts of boilers.
Model: Long term use temperature, applicable scenarios for power plants
Standard aluminum silicate blanket 1050 ℃ flue, hot air duct, 450-550 ℃ pipeline backing
High purity aluminum silicate blanket for 1100 ℃ boiler roof and outer wall of header
High alumina type aluminum silicate blanket 1200 ℃ furnace outlet, high-temperature backing in superheater area
Zirconium containing aluminum silicate blanket at 1300 ℃ ultra-high temperature, with frequent start stop and thermal shock in large areas
Aluminum silicate needle punched blanket+calcium silicate plaster material+high temperature resistant wire mesh+high temperature adhesive
The amount of insulation materials required for steam turbines of different sizes and grades is not consistent;
What are the application locations and selection levels of aluminum silicate blanket refractory insulation materials in power plants? The working conditions of power plants are complex, and strict requirements are placed on the quality of insulation products, especially for the ultra-high temperature of steam turbines. Generally, insulation materials are prone to pulverization, so aluminum silicate blanket high-temperature resistant materials are chosen. Rosewool Insulation Refractory Co.,Ltd. specializes in supplying various grades of aluminum silicate blankets, including standard, high aluminum, and zirconium containing types, with a bulk density of 128-160kg/m ³ that can be customized according to needs. It has low slag ball content, high tensile strength, and is resistant to wind erosion and not easy to pulverize and settle. It is suitable for different temperature conditions such as boilers, flues, and high-temperature pipelines; Rosewool Insulation Refractory Co.,Ltd. has multiple large-scale production lines and is deeply involved in power insulation projects. It has rich experience in supplying power plant projects and can provide supporting services such as selection advice and technical disclosure. The product stability has been verified by multiple power plant major repairs and new construction projects, and the delivery cycle is stable. It is a reliable manufacturer of high-temperature insulation for power plants.
