Antifreeze method for power station boilers in alpine regions

Abstract

The invention discloses an anti-freezing method for a power station boiler in an alpine region. The anti-freezing method comprises the following steps that a temporary combustor is installed; holes ina furnace and a vertical shaft are closed or blocked; heat preservation treatment is performed on a pipeline; fuel is ignited through the temporary combustor to generate high-temperature flue gas, and the high-temperature flue gas sequentially passes through a high-temperature reheater, a high-temperature superheater and a platen superheater, so that water in the high-temperature reheater, the high-temperature superheater and the platen superheater is evaporated into water vapor, a part of the water vapor is discharged through an emptying pipe, a part of the water vapor is condensed into liquid water and is discharged from a drain pipe; and when no water vapor and condensate water are discharged from the drain pipe, the temporary combustor is shut down. According to the anti-freezing method, a boiler undergoes combustion heating, so that water in the high-temperature reheater, the high-temperature superheater and the platen superheater is evaporated into the water vapor to be discharged, then the situation that the water remains in the high-temperature reheater, the high-temperature superheater and the platen superheater, then the water is evaporated into the water vapor, so thatequipment are frozen and damaged can be avoided, and the safety of the boiler can be maintained.

Description

technical field [0001] The invention relates to the technical field of boiler construction, in particular to an antifreeze method for power station boilers in alpine regions. Background technique [0002] During the installation of boiler equipment, the construction period of large-scale power plant boilers is generally longer. The winter temperature in the alpine region can reach below minus 19°C. Due to the limitation of the project progress, the boiler cannot be turned into a hot state operation before the winter, and it is inevitable to survive the winter in a cold state. [0003] When the temperature is low, the water in the boiler will freeze and damage parts such as valves and pipes. Therefore, it is necessary to drain the water in the boiler before winter. Most of the water can be drained through the boiler itself, but the screen type There will also be residual water in the superheater, high temperature superheater and high temperature reheater. Contents of the i...

AI Technical Summary

Problems solved by technology

[0003] When the temperature is low, the water in the boiler will freeze and damage parts such as valves and pipes. Therefore, it is necessary to drain the water in the boiler before winter. Most of the water can be drained through the boiler itself, but the screen type There will also be residual water in the superheater, high temperature superheater and high temperature reheater