Method for comprehensive treatment of condensation wastewater and by-production of sodium butyrate

The method comprises the following steps: pumping the condensation wastewater into an oxidation tank, introducing ozone for oxidation, oxidizing butyraldehyde and butanol in the wastewater into butyric acid, carrying out neutralization reaction on the butyric acid and sodium hydroxide in the wastewater to generate sodium butyrate, and pumping the oxidized feed liquid into a buffer tank; the wastewater in the buffer tank is sent to a two-effect evaporator for evaporation concentration, sodium butyrate is concentrated to 45-47wt%, the concentrated solution flows into a concentrated solution storage tank after being cooled, and steam generated by evaporation flows into a wastewater tank after being subjected to heat exchange and cooling; cooling and crystallizing the concentrated solution in the concentrated solution storage tank; pumping the crystallized slurry into a filtering and drying all-in-one machine for filtering and drying to obtain a sodium butyrate product, and enabling filtrate to flow into a wastew