The temperature of the waste gas from the methanol recovery tower when leaving the production line is relatively high.70to80It may contain a small amount of solid impurities, so filter to remove the impurities first, and then enter an absorption section. In this absorption section, the solvent concentration is 15%.toTwenty percent of the mixed aqueous solution absorbs the waste gas in the first absorption section. The absorbed liquid is calculated according to the material constant, and part of it is sent to distillation for recovery, while the rest continues to circulate.