What is added when boiling the device’s steam drum?
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Previously, we added sodium hydroxide and trisodium phosphate when cleaning the boiler; now I’ve noticed that in some sources it is mentioned that hydrazine and trisodium phosphate should be used. I would like to discuss with everyone whether it is possible to omit trisodium phosphate as long as the water quality is good during boiler cleaning, and what exactly is hydrazine? And how to determine the amounts of sodium hydroxide, hydrazine, and trisodium phosphate?
The main purpose of boiling is to remove oil stains, and substances such as trisodium phosphate, hydrazine, or sodium hydroxide function in a similar way to laundry detergent. Therefore, the operation of the boiler has nothing to do with the quality of the water; the aforementioned substances (alkalis) are necessary in order to remove oil stains. Urea, compared to sodium hydroxide, is a weak base, and it works as well. Here are a few links where you can learn* a bit; it will definitely be helpful to you. 1. http://bbs.hcbbs.com/viewthread.php?tid=161302 2. http://bbs.hcbbs.com/viewthread.php?tid=124386 3. http://bbs.hcbbs.com/thread-218638-1-10.html
According to the \"Technical Specifications for Construction and Acceptance of Electric Power Facilities\" (Boiler Units Section), drum boilers with a working pressure of less than 9.8 Mpa may not require chemical cleaning, but can instead be treated through alkali boiling. Alkaline substances such as trisodium phosphate, sodium carbonate, or sodium hydroxide can be used alone or in combination as boiler cleaning solutions
It must be added; the boiling furnace is primarily used to remove dirt from inside the device, and it is a necessary procedure to ensure normal operation without contamination；
Thank you all for the information provided. Is the amount to be added for each of them 3–5 Kg per cubic meter of water?