corrosion of pipes in boilers by oxygen can be alleviated, ZOZEN Boiler tells you how to use the boiler deoxidizer

As all know, oxygen in the water can cause the part corrosion of feed water pipes, boiler equipment and path of steam turbine, which can shorten the service life of equipment. Therefore, in the process of boiler feed water treatment, oxygen removal is very important. Generally speaking, corrosion of pipes in boilers by oxygen can be alleviated via the use of boiler deoxidizer to extend the service life of boiler.

Above all, in order to better understand how corrosion of pipes in boilers by oxygen can be alleviated, let us analyze the reasons for boiler equipment corrosion first. The corrosion of boiler heating surface is mainly divided into chemical corrosion and electrochemical corrosion. Since the boiler water contains acid, alkali, and salt, which are all electrolytes, the corrosion of the boiler is mainly electrochemical corrosion. Electrochemical corrosion is mainly affected by dissolved gases and salts. If the water contains more O₂ and CO₂, the corrosion will accelerate. The occurrence of boiler metal corrosion will shorten its service life, and will also aggravate the heating surface scaling of the boiler with high thermal load, thereby promoting another kind of electrochemical corrosion, that is, under-deposit corrosion.

Therefore, electrochemical corrosion is the main cause of boiler equipment corrosion. However, how corrosion of pipes in boilers by oxygen can be alleviated? This method is to use boiler deoxidizer. Next, ZOZEN Boiler will introduce the common boiler deoxidizer and its usage for you.

The common boiler deoxidizer such as carbohydrazide, also known as carbazide, has low toxicity, high melting point, and deoxygenation efficiency far higher than ordinary materials. It is an ideal product for safety and environmental protection. Its appearance is white fine crystals, which are easily soluble in the water and produce harmless substances with dissolved oxygen in the water. The pumping amount is small and the effect is quick. In actual use, in order to completely remove the O₂ in the water, it is necessary to maintain a certain excess amount to ensure that corrosion of pipes in boilers by oxygen can be alleviated.

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In addition, whether the deoxidizer is used correctly will also affect whether corrosion of pipes in boilers by oxygen can be alleviated. Here, ZOZEN Boiler will give you a detailed introduction to the use of deoxidizer. Under the same water temperature condition, the greater the excess amount of deoxidizer in the water, the faster and more complete the chemical reaction; under the same dosage condition, the higher the water temperature, the better the deoxygenation effect; under the same deoxygenation effect condition, the higher the water temperature, the smaller the dosage. The deoxidizer dosage G can be calculated by the formula that is G=8[O₂]+β. O₂ is the amount of oxygen in the water whose unit is mg/L, and β is the excess amount of deoxidizer whose unit is mg/L and the value usually is 10-15. Therefore, the general dosage is 40-50 mg/L. The deoxidizer can be added to the feed water pipes in front of the feed water pump by using an orifice or membrane type dosing device or a piston water pump.

In conclusion, the correct and reasonable use of boiler deoxidizer is the key for whether corrosion of pipes in boilers by oxygen can be alleviated. If corrosion of pipes in boilers by oxygen can be alleviated, it can further extend the service life of the boiler. Therefore, in order to save boiler operating and maintenance costs, companies using boilers must pay attention to the problem of boiler pipe corrosion caused by oxygen and constantly explore new methods to ensure that corrosion of pipes in boilers by oxygen can be alleviated and ensure the safe and stable operation of the boiler. If you have more questions about "whether corrosion of pipes in boilers by oxygen can be alleviated", please consult the online customer service of ZOZEN Boiler.