Necessity of boiler deaerators
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Is it necessary to install a boiler deaerator? Some boilers are equipped with deaerators while others are not; what factors are mainly considered?
No way, steam boilers usually come equipped with deaerators; otherwise, it will cause corrosion in the boiler.
Oxygen in steam can cause corrosion in boilers; therefore, deaerators are installed under normal circumstances. If there is no deaerator, it is probably in small boilers or boilers with low steam pressure, in order to save costs
It depends on the size of your boiler; generally, very small chain boilers do not have deaerators. I’m not exactly sure what the capacity is – I’ll check it. Boilers that are a bit larger do have deaerators.
Generally, hot water boilers below 7 MW and steam boilers below 4 t/h do not require a deaerator.
Steam boilers must have deaerators; otherwise, corrosion will be severe!
Reply to 6# LZEXEX: Can’t steam boilers remove oxygen on their own? For other boilers, **according to regulations**, a boiler deaerator is required for those with a capacity of over 10T. There are various types of boiler deaeration equipment; in terms of operating costs, the method of physical absorption at room temperature combined with a small amount of sodium sulfite results in the lowest costs, is simple to maintain, and yields good results.
Dissolved oxygen in the water is the main cause of boiler corrosion. In boilers, the temperature of the water vapor is usually very high, which accelerates the rate of oxygen-induced corrosion. Moreover, since corrosion occurs in a localized manner and can progress over time, it poses a serious threat to boilers. Pipe burst and leakage accidents caused by oxygen-induced corrosion force the boiler to shut down, reducing its service life. Therefore, proper deoxidation of boiler feed water to prevent corrosion of boiler equipment is extremely important for ensuring the safe and economical operation of such equipment.
It is very dangerous to have no deaerator or to have one that is not functional; both are necessary. Some use thermal deaerators, while others use vacuum deaerators. Vacuum deaerators are more energy-efficient and offer various advantages, such as reducing steam consumption during the deaeration process.
What size of boiler requires a deaerator? What are the current mainstream methods for deoxidation?
Generally speaking, there’s no such thing as wasted money on something that doesn’t yield any results. One should not skip certain equipment in pursuit of short-term gains, as it will ultimately result in greater losses