Issues with loading 98% concentrated sulfuric acid
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Ladies and gentlemen, 98% concentrated sulfuric acid is loaded through the top of a dip pipe, and the gas released from the tank truck is drawn out via the gas line of that dip pipe. So, where should this extracted gas be directed? Does the gas pipeline need insulation? Thank you
Set up a neutralization tank; the acidic gas is fed into the tank, using caustic soda.
I’m not very clear about sulfuric acid； Our company uses flexible hoses to load and unload liquid ammonia, with all the gas pipelines connecting the tank trucks to the liquid ammonia tanks ； (through the compressor) ； I’m not sure about the equipment structure of your company ； The individual analysis should allow the gas pipeline to be connected to the storage tank ； If the storage tank is equipped with an exhaust gas absorption device to treat the exhaust gases from tank trucks through this device ； The gas pipeline should not necessarily be kept at a constant temperature
Thank you, moderator. It hasn’t been returned to the storage tank; there’s now a sulfuric acid ditch at the site. Is it okay to direct the gas pipes directly into that ditch?
In principle, it is not acceptable to directly discharge it into sewers or the atmosphere； (Of course, many companies do this when the local authorities fail to enforce proper regulations); one thing to consider is whether you have storage tanks for raw materials If not, it’s best to prepare an absorption tank or build an absorption cell ；
There are raw material storage tanks, and these tanks are also directly connected to the atmosphere. Is there a lot of acid mist generated when loading 98% sulfuric acid?
Also, are there any relevant regulations specifying the emission of its exhaust gases? Thank you!
Direct discharge is definitely not acceptable; sulfuric acid is corrosive, so measures must be put in place to collect and recover the condensate. For specifications, refer to Article 9.1.11 of the Oil Storage Tank Design Code
98% sulfuric acid produces almost no acid mist; what comes out of the piping used for loading is mainly air, so it can be released into the atmosphere without any problem. If it is necessary to meet environmental protection requirements, a water absorption tank can be installed to absorb any acidic gases that might be present.
Led to the water washing unit, no insulation required