Power plant unit boilers, pipelines SCR、 What are the allowable temperatures of the medium in each part of the steam turbine and the design outer wall?
Release Time: 2026-10-13
Share:
Power plant unit boilers, pipelines SCR、 What are the allowable temperatures of the medium in each part of the steam turbine and the design outer wall? The allowable temperature for important parts of the thermal system in power plants, such as boilers, pipelines, steam turbines, and outer walls, shall comply with the domestic thermal equipment insulation design specification GB/T 4272, which states that "when the environment is 25 ℃, the outer wall temperature of the equipment/pipeline after insulation shall be ≤ 50 ℃"; Some high-temperature equipment and areas that are not easily touched by people can be relaxed to ≤ 60 ℃. General requirements for thermal equipment in power plants: "The temperature of the insulation outer wall should be controlled within 50 ℃ to reduce heat loss, prevent burns, and reduce coal consumption of the unit. Rosewool Insulation Refractory Co.,Ltd. produces "Ceramic Fiber Blanket" and "Ceramic Fiber PLUS Blanket", which belong to high-temperature resistant fiber insulation products. They have low thermal conductivity, low heat capacity, thermal shock resistance, good flexibility, convenient construction, and are suitable for power plant boilers and flues SCR、 Thermal insulation engineering for steam turbine cylinders and high-temperature steam pipelines. Recommended supporting products for different locations ( Rosewool Insulation Refractory Co.,Ltd.) 1. "Boiler system"
-High temperature pipelines for furnace top, superheater, and reheater (medium 500~600 ℃): "Ceramic fiber PLUS blanket" is recommended; Resistant to high temperatures and vibrations, reduces heat dissipation at high temperatures, and is less prone to collapse during long-term use.
-Water cooled wall and economizer (medium<360 ℃): We recommend "ceramic fiber blanket" to meet insulation requirements and achieve better cost. 2. SCR denitration system (reactor+inlet and outlet flue gas 280~430 ℃)
-SCR reactor shell and flue: prioritize "ceramic fiber PLUS blanket". The flue gas has smoke erosion and temperature fluctuations. PLUS blanket has high tensile strength, thermal shock resistance, and is not easily damaged, ensuring stable control of the outer wall at ≤ 50 ℃, reducing heat loss in the denitrification system, and ensuring stable denitrification reaction temperature. 3. "Steam turbine and steam pipeline"
-High pressure cylinder, main steam pipeline (530~566 ℃): "Ceramic fiber PLUS blanket". The steam turbine body continues to vibrate, and the PLUS blanket has strong toughness, anti vibration fatigue, and is not easy to crack. The insulation layer is stable, and the outer wall temperature meets the standard, reducing the heat dissipation loss of the unit.
-Medium pressure cylinder and extraction steam pipeline: ceramic fiber blanket, with moderate operating temperature to meet insulation requirements.
-Low pressure cylinder: ceramic fiber blanket is sufficient. Application advantages of Rosewool Insulation Refractory Co.,Ltd. materials:
Excellent insulation effect, can stably control the outer wall of the equipment within 50 ℃, reduce heat loss, save coal, and improve the economic efficiency of the unit;
Rosewool Insulation Refractory Co.,Ltd. Ceramic Fiber PLUS Blanket, anti erosion, anti vibration, low high temperature shrinkage, suitable for boilers SCR、 Turbine vibration+flue gas flushing conditions result in longer service life;
The blanket material has good flexibility, and can be wrapped around curved pipes, irregular curved surfaces of cylinders, and corners of flues for easy cutting, shortening the on-site construction period;
The product is lightweight, reducing the load on the boiler, flue, and turbine body;
No toxic substances, meets the environmental protection requirements of power plants, and does not corrode equipment shells.
