Naphthalenesulfonic acid series products are important fine chemical products for medicine, biology, dyes, etc. However, a large amount of wastewater is generated in the production of naphthalenesulfonic acid series products. The waste liquid has high COD, high chroma, strong acidity and is difficult to biodegrade. There are many methods for extracting naphthalenesulfonic acid wastewater. Among them, the complex extraction method has won the favor of many chemical, pharmaceutical and dye companies for its high extraction efficiency, good extraction effect, low investment cost and high production efficiency. The regenerated extractant after stripping can be reused many times without affecting the extraction effect.
Naphthalenesulfonic Acid Wastewater Treatment Process
In the treatment of naphthalenesulfonic acid wastewater, the operation process of the centrifugal extractor is usually divided into the following steps:
- pH adjustment and extractant addition, add concentrated sulfuric acid to adjust the pH of the wastewater to an appropriate range (usually an acidic environment), and then add a complexing extractant (such as an amine extractant and kerosene mixed system) to form a complex between naphthalenesulfonic acid and the extractant.
- Use CWL-M centrifugal extractor to achieve rapid separation of wastewater and loaded extractant under high-speed rotation. After two-stage cross-current extraction, the COD removal rate of wastewater reaches 94.6%, and the COD of residual liquid is reduced to 1470mg/L, which directly meets the emission standards.
- Stripping and resource recovery, naphthalenesulfonic acid is separated from the extractant by stripping agent (such as alkaline solution), the extractant can be recycled, and the recovered naphthalenesulfonic acid can be directly reused in the production line.
Zhengzhou Tiei Extraction CWL-M Centrifugal Extractor Advantages
- Low power consumption: The motor power of the traditional 650 centrifuge is 37KW. Under the premise of ensuring the extraction rate and separation effect, the motor power of the CWL650-M centrifugal extractor is 4KW, and the power consumption is about 1/10 of the traditional model.
- No vulnerable parts: The CWL-M centrifugal extractor adopts an upper hanging structure, which cancels the bottom machine seal of the traditional model, thus completely solving the problem of bottom leakage and easy damage of the machine seal of the traditional model.
- Simple and stable structure: The CWL-M centrifugal extractor has simplified the body from the beginning of its design, making it easier to operate and run more smoothly.
- Weir plate replacement: The CWL-M centrifugal extraction can realize the rapid replacement of the heavy phase weir plate.
The centrifugal extractor solvent extraction method is effective in treating naphthalenesulfonic acid organic wastewater. For more details, please consult Zhengzhou Tiei Extraction!
Email: sales@tieiextraction.com
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