Corrosion is harmful to boilers and will reduce the safety and service life of the boiler. So what are the reasons for the corrosion of gas boilers? How to carry out boiler anti-corrosion maintenance work? Let's learn about it with XinLi boiler.

Corrosion Causes of Gas Boilers

　　The first reason is that the temperature of the flue gas and tube wall in the heating surface of the tail and the heating surface of the boiler tail is low, and there will be low temperature corrosion of sulfuric acid.

　　The second reason is the excess air coefficient. If the excess air coefficient is large, the SO3 content in the flue gas will be high, and low temperature corrosion will occur when the feed water temperature is low.

　　The third reason is operation and management. If the furnace worker has little experience in operating the boiler and the operation is unreasonable, the water temperature at the outlet of the boiler will be low, so that the temperature of the flue gas at the end of the flue pipe will also decrease, causing the acid source to easily condense, forming a negative effect on the flue pipe. corrosion.

Boiler anti-corrosion maintenance

　　1. Cleaning. For example, after the steam boiler is stopped and cooled, the ash on the heating surface and the ash on the upper part of the grate and the lower part of the furnace body should be completely removed.

　　2. Desiccant should be placed in the boiler furnace and flue, 3 kg per cubic meter. Another point is to use a combination of frequent low-fire baking and placing desiccant to reduce the corrosion of the furnace body according to the wet condition of the ground.

　　3. Boiler water, the pH value in the boiler hot water is controlled within the specified range, and a tight protective film will be formed to avoid corrosion of the metal wall in the hot water boiler.

　　The above are the reasons for the corrosion of gas boilers and the daily anti-corrosion maintenance work for you, for the reference of boiler customers.