In which units of refineries are waste sulfuric acid regeneration units generally used?
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I would like to ask whether units for alkylation, MMA, and acrylonitrile all utilize waste sulfuric acid regeneration processes? What other devices are used?
There are both alkylation and acrylonitrile processes; the acrylonitrile plant at Lianyungang Sierbang Petrochemical has used many of my valves and pipes.
For these devices, it’s sufficient to use waste acid for regeneration.
I would like to ask, what is the typical oxygen content level that should be maintained in a spent acid pyrolysis furnace?
It is generally between 2-2.5%
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