Chemical cleaning of nitrogen pipeline
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During the chemical cleaning of nitrogen pipelines, is it necessary to perform chemical cleaning from the outlet of the nitrogen compressor to the high-pressure nitrogen tank, as well as for the low-pressure nitrogen entering the nitrogen buffer tank?
Chemical cleaning is not necessary; it is essential to clean it thoroughly
The outlet of the emergency nitrogen compressor requires chemical cleaning, using a circulation cleaning method; the emergency nitrogen tank is cleaned by rinsing. This is the approach adopted in most projects, especially for emergency nitrogen tanks, which are often not given due attention. In fact, this is the most dangerous part – the emergency nitrogen pipelines and tanks should be cleaned using both circulation cleaning and rinsing.
Cleaning is necessary· During start-up and shutdown purging, it comes into direct contact with oxygen
First, it is necessary to clarify the users of the containers and pipes being used, as well as the material of these pipes and containers. Usually, only physical purging is sufficient; for special applications, acid cleaning and degreasing are required, and purging is also necessary after connection.
Nitrogen pipelines do not require chemical cleaning; only steam pipelines do! ! !
What material? Generally, chemical cleaning, pressure testing, and purging are sufficient.
It’s better to have it, as pressure cleaning alone isn’t enough to clean it thoroughly!
We use water-coal slurry gasification; the pipeline from the nitrogen compressor outlet to the nitrogen tank has been acid-washed. Acid washing is necessary because it is a high-pressure nitrogen deoxygenation pipeline, and there are potential risks involved.
Same as Floor 9; experienced a certain coal-water slurry gasification unit. The high-pressure nitrogen system is directly connected to the high-pressure oxygen system. Given the high cleanliness requirements of the high-pressure oxygen system, the nitrogen system requires thorough chemical cleaning, and its cleanliness standards are also quite high.