| abstract |
The invention discloses a pretreatment process for waste water produced by aldehyde ammonia pyridine. The specific steps of the process are: 1) use an ammonia stripping tower to strip the pyridine production wastewater, and control the ammonia nitrogen content in the tower bottom liquid discharge liquid to be no higher than 300 mg/L; 2) strip the cooled stripping tower bottom liquid , at room temperature, pumped at a certain speed into the resin column formed by the A column resin and the B column resin in series; 3) The A column resin and the B column resin are desorbed and regenerated respectively; 4) The stripping tower top liquid is passed through The condensation enters the incinerator, and the desorbed liquid of the resin column A enters the incinerator for incineration. The advantage is that the amount of incineration is greatly reduced, reduced to 1/8 of the original, the fuel used for incineration is greatly reduced, and the cost of wastewater treatment is reduced. The ring content is zero, and the water quality entering the biochemical system is not toxic, which improves the biodegradability of the wastewater. |