Method for continuously treating sulfonic acid wastewater

The invention discloses a method for continuously treating sulfonic acid wastewater. The method for continuously treating sulfonic acid wastewater comprises the following steps of: regulating a pH value of the wastewater to 1-2 by using acid or alkali; continuously flowing the wastewater into the bottom of an extracting tower, continuously adding an extracting agent, which is 0.10-0.25 times the volume flow rate of the sulfonic acid wastewater, to the bottom of the extracting tower for carrying out concurrent extraction; entering the mixture into the middle part of a quantizer after flowing out from the tower top, wherein the water layer continuously flows out from the bottom of the quantizer and can be directly fed to a sewage treatment station for treatment, the oil layer continuously flows out from the top of the quantizr and enters the lower part of a reverse extraction tower for carrying out counter-current extraction with diluted alkali, which is 0.05-0.2 times of the volume flow rate of the sulfonic acid wastewater continuously added to the upper part of the reverse extraction tower; and recycling the regenerated extracting agent after flowing out from the top of the reverse extraction tower, flowing the enriched sulfonate aqueous solution out from the bottom of the reverse extraction tower for being recycled as the product after being further treated. The method for continuously treating sulfonic acid wastewater has the advantages of large treatment capacity, low energy consumption, high recovery rate and high COD (Chemical Oxygen Demand) removing rate, and is stable to operate, simple to process and capable of greatly reducing the wastewater furthermore treatment difficulty.