| abstract |
The utility model is related to a kind of systems improving stainless steel acid-washing waste liquid nitric acid regeneration yield, including hydrolysis roaster, preconcentrator, acid absorption column, scrubbing tower, condenser, knockout drum and the catalytic denitration device set gradually；The utility model in flue gas before acid absorbs first cool down, and to effectively improve the absorptivity of nitric acid, while spraying into oxidant in flue gas, can NO be oxidized to N 2 O 5 Contour valence state species further increase the yield of nitric acid. |