Cold winter has passed, spring and summer is coming, some heating hot water boilers have begun to shut down, waiting for the next heating period.But recently, we found that a lot of hot water boiler after the furnace, internal and external corrosion is very serious.How to eliminate the corrosion of hot water boiler.Henan Huatai boiler to tell some simple solution skills!

First of all, let's take a look at the reasons for the corrosion of hot water boilers

1, do not control the supply of water, a 2.8MW hot water boiler, every day to fill nearly 100 tons of water, but more often, there is no need to fill so much water.

2, do not seriously implement the "low pressure boiler water quality standard", the standard clearly stipulates that when the water supply temperature is less than or equal to 95℃, the circulating water should be controlled pH value of 10-12, which is a very important indicator.

3. The installation of heat network pipeline is unqualified, and the circulating water cannot be delivered to the users at the end of the system.Increase the number of air emissions, drainage is hot, not cool, resulting in increased leakage.

4. It may also be that the expansion tank is inconsistent with the constant pressure of the boiler.The height is less than 15 meters, but the constant pressure of the boiler is 2.5kg/cm2. The furnace workers often replenish water in order to maintain the working pressure index of 2.5kg/cm2. The water overflows into the ditch without any reason, and it is wasted.

Secondly, the solution to the degree of corrosion of hot water boiler

1, for the boiler water replenishment rate exceeds the standard, we must find out the reason to suit the case, cut off all the water discharge valve, plug all the run, risk, drop, leakage, strictly implement the management system, so that the water replenishment rate standard.

2. A small amount of water is inevitable, but the quality of water should be paid attention to, and it is best to supply deoxygenated water.

3. The boiler water for heating alone can use the waste heat of the tail flue to fill the trina phosphate and sodium sulfite into the boiler at the same time, which is beneficial and harmless to the boiler.Strictly control the pH value of furnace water, and regularly test the pH value.

Finally, the maintenance of hot water boiler after shutdown

After the hot water boiler is out of service, it is best to use dry maintenance.All the water in the boiler is put clean, and the moisture is baked out with a small fire, and then the stone or calcium chloride is added, according to the volume of the boiler per cubic meter plus 2kg -3kg, to ensure that the inner wall of the pot is dry, which can effectively prevent the corrosion of the boiler during the period of outage.