Add nitrogen purge pipe to sulfuric acid delivery pipeline
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A nitrogen purging pipe is added to the concentrated sulfuric acid pipeline running from the oil depot to the ammonium sulfate plant; after each delivery of acid, nitrogen is used to purge any remaining acid in the pipeline into the acid discharge tank. It has been over two years since construction began, and there has never been any leakage from this pipeline.
May I ask the original poster: Was the nitrogen purchased in bottled form or supplied by a steel plant? But can’t we use the vent pipe after pumping in the acid?
The pipeline is quite long, about 500 to 600 meters I think. The nitrogen was supplied by the power department.
Nitrogen is produced by nitrogen generators; the pipelines in our factory have never been purged with nitrogen, and it has been five years – there was one major leak.
There was no purging here; new pipes were installed after five years
Nitrogen purging is recommended to reduce sulfuric acid corrosion； If not used, the pipeline must be airtight.
We have been in operation for 3 years; we haven’t missed a single day, nor have we carried out any purging. However, the pipeline is relatively short – around 200 meters I think
If the source of nitrogen is not convenient, could compressed air be considered as an alternative? This allows for the use of locally available materials. Compressed air is generally available in every coking plant, as compressors are present there. If the pipelines are not too long, it is sufficient to use simple discharge pipes