If the hot water boiler is used improperly in use, it will cause corrosion and seriously affect the service life of the hot water boiler. Now we will understand the corrosion phenomenon of the hot water boiler and the solution.
1. Oxygen corrosion
During the construction and decommissioning of traditional boilers, if there is no protective measure, the atmosphere will invade the boiler. Because the atmosphere contains oxygen and moisture. This causes oxygen corrosion. The pits caused by oxygen corrosion will accelerate the corrosion during the subsequent operation; within the entire system during the outage. In particular, in areas that are prone to stagnant water, if there are residues and slag on the surface, the corrosion will be more serious than in normal operation.
2.Backwater condensation corrosion
The temperature of the heating return water in the northern part of China is designed to be 75 ° C, but it is usually 50 ° C or even lower in actual use. At this time, the water vapor in the flue gas will condense into liquid water and mix with SO2 and NOx produced by combustion to form The strong acid severely corrodes the chimney, smoke chamber and smoke pipe, and the red rust water flowing out of the smoke chamber behind the boiler is caused by corrosion. This kind of corrosion is no exception even for imported boilers. In about three years, the boilers were worn out.
3.Fouling of the main furnace and smoke pipe
Many electric hot water boilers directly heat external hot water, and the quality of the water directly affects the life of the boiler. After the hot water is heated, scale will be continuously precipitated and deposited on the furnace and the smoke pipe one by one, which will increase the heat transfer heat resistance and reduce the boiler efficiency. When the scale accumulates to a certain extent, the furnace and the smoke pipe will be burned through, resulting in the boiler being scrapped.
