Naphthalenesulfonic acid wastewater is a common chemical organic wastewater. A large amount of this type of wastewater is generated during the production process of chemical plants. Naphthalenesulfonic acid wastewater contains high organic matter and generally has high COD, making it difficult to directly enter the biochemical stage for treatment. Therefore, the wastewater must be pretreated to extract the organic matter in it and reduce the COD before subsequent treatment.

There are many methods for pretreatment of naphthalenesulfonic acid wastewater, but the most commonly used method is solvent extraction, because of its good extraction effect and low investment. Specific process flow:

  1. Mixed mass transfer: First, add concentrated sulfuric acid to adjust the pH value of the wastewater, then add the complexing extractant, let it mix and contact with the naphthalenesulfonic acid wastewater, and use the different distribution ratios of pollutants in water and solvent to separate and extract pollutants.
  2. Stripping: Use the stripping agent to strip the extractant containing the extractant, recover the useful substances in it, regenerate the extractant and reuse it.

The centrifugal extractor has a significant operating effect in the treatment of high-concentration organic wastewater in the chemical industry. The CWL-M centrifugal extractor is a new, fast and efficient liquid-liquid extraction and separation equipment. It is essentially different from traditional extraction equipment such as mixer settlers and extraction columns in terms of working principle. The centrifugal extractor uses a motor to drive the drum to rotate at high speed. Two liquids with different densities and immiscible with each other complete the mixing and mass transfer under the shear force generated by the rotation of the drum or blades, and are quickly separated under the centrifugal force generated by the high-speed rotation of the drum.

Zhengzhou Tiei Extraction is an enterprise that develops and produces liquid liquid extraction equipment. The CWL-M series centrifugal extractors are widely used in extraction and washing operations in many fields. Regarding the pretreatment of naphthalenesulfonic acid wastewater, we have provided relevant cases to many companies. Therefore, we can help you in the pretreatment of naphthalenesulfonic acid wastewater.
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